Merge pull request #2576 from taliesins/HyperV

Add Hyper-V builder

.gitattributes

@@ -0,0 +1,2 @@
+
+common/test-fixtures/root/*	eol=lf

builder/hyperv/common/artifact.go

@@ -0,0 +1,65 @@
+package common
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"github.com/mitchellh/packer/packer"
+)
+
+// This is the common builder ID to all of these artifacts.
+const BuilderId = "MSOpenTech.hyperv"
+
+// Artifact is the result of running the hyperv builder, namely a set
+// of files associated with the resulting machine.
+type artifact struct {
+	dir string
+	f   []string
+}
+
+// NewArtifact returns a hyperv artifact containing the files
+// in the given directory.
+func NewArtifact(dir string) (packer.Artifact, error) {
+	files := make([]string, 0, 5)
+	visit := func(path string, info os.FileInfo, err error) error {
+		if !info.IsDir() {
+			files = append(files, path)
+		}
+
+		return err
+	}
+
+	if err := filepath.Walk(dir, visit); err != nil {
+		return nil, err
+	}
+
+	return &artifact{
+		dir: dir,
+		f:   files,
+	}, nil
+}
+
+func (*artifact) BuilderId() string {
+	return BuilderId
+}
+
+func (a *artifact) Files() []string {
+	return a.f
+}
+
+func (*artifact) Id() string {
+	return "VM"
+}
+
+func (a *artifact) String() string {
+	return fmt.Sprintf("VM files in directory: %s", a.dir)
+}
+
+func (a *artifact) State(name string) interface{} {
+	return nil
+}
+
+func (a *artifact) Destroy() error {
+	return os.RemoveAll(a.dir)
+}

builder/hyperv/common/artifact_test.go

@@ -0,0 +1,43 @@
+package common
+
+import (
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/mitchellh/packer/packer"
+)
+
+func TestArtifact_impl(t *testing.T) {
+	var _ packer.Artifact = new(artifact)
+}
+
+func TestNewArtifact(t *testing.T) {
+	td, err := ioutil.TempDir("", "packer")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.RemoveAll(td)
+
+	err = ioutil.WriteFile(filepath.Join(td, "a"), []byte("foo"), 0644)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if err := os.Mkdir(filepath.Join(td, "b"), 0755); err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	a, err := NewArtifact(td)
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+
+	if a.BuilderId() != BuilderId {
+		t.Fatalf("bad: %#v", a.BuilderId())
+	}
+	if len(a.Files()) != 1 {
+		t.Fatalf("should length 1: %d", len(a.Files()))
+	}
+}

builder/hyperv/common/config_test.go

@@ -0,0 +1,11 @@
+package common
+
+import (
+	"testing"
+
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+func testConfigTemplate(t *testing.T) *interpolate.Context {
+	return &interpolate.Context{}
+}

builder/hyperv/common/driver.go

@@ -0,0 +1,104 @@
+package common
+
+// A driver is able to talk to HyperV and perform certain
+// operations with it. Some of the operations on here may seem overly
+// specific, but they were built specifically in mind to handle features
+// of the HyperV builder for Packer, and to abstract differences in
+// versions out of the builder steps, so sometimes the methods are
+// extremely specific.
+type Driver interface {
+
+	// Checks if the VM named is running.
+	IsRunning(string) (bool, error)
+
+	// Checks if the VM named is off.
+	IsOff(string) (bool, error)
+
+	//How long has VM been on
+	Uptime(vmName string) (uint64, error)
+
+	// Start starts a VM specified by the name given.
+	Start(string) error
+
+	// Stop stops a VM specified by the name given.
+	Stop(string) error
+
+	// Verify checks to make sure that this driver should function
+	// properly. If there is any indication the driver can't function,
+	// this will return an error.
+	Verify() error
+
+	// Finds the MAC address of the NIC nic0
+	Mac(string) (string, error)
+
+	// Finds the IP address of a VM connected that uses DHCP by its MAC address
+	IpAddress(string) (string, error)
+
+	// Finds the hostname for the ip address
+	GetHostName(string) (string, error)
+
+	// Finds the IP address of a host adapter connected to switch
+	GetHostAdapterIpAddressForSwitch(string) (string, error)
+
+	// Type scan codes to virtual keyboard of vm
+	TypeScanCodes(string, string) error
+
+	//Get the ip address for network adaptor
+	GetVirtualMachineNetworkAdapterAddress(string) (string, error)
+
+	//Set the vlan to use for switch
+	SetNetworkAdapterVlanId(string, string) error
+
+	//Set the vlan to use for machine
+	SetVirtualMachineVlanId(string, string) error
+
+	UntagVirtualMachineNetworkAdapterVlan(string, string) error
+
+	CreateExternalVirtualSwitch(string, string) error
+
+	GetVirtualMachineSwitchName(string) (string, error)
+
+	ConnectVirtualMachineNetworkAdapterToSwitch(string, string) error
+
+	CreateVirtualSwitch(string, string) (bool, error)
+
+	DeleteVirtualSwitch(string) error
+
+	CreateVirtualMachine(string, string, int64, int64, string, uint) error
+
+	DeleteVirtualMachine(string) error
+
+	SetVirtualMachineCpuCount(string, uint) error
+
+	SetVirtualMachineMacSpoofing(string, bool) error
+
+	SetVirtualMachineDynamicMemory(string, bool) error
+
+	SetVirtualMachineSecureBoot(string, bool) error
+
+	SetVirtualMachineVirtualizationExtensions(string, bool) error
+
+	EnableVirtualMachineIntegrationService(string, string) error
+
+	ExportVirtualMachine(string, string) error
+
+	CompactDisks(string, string) error
+
+	CopyExportedVirtualMachine(string, string, string, string) error
+
+	RestartVirtualMachine(string) error
+
+	CreateDvdDrive(string, string, uint) (uint, uint, error)
+
+	MountDvdDrive(string, string, uint, uint) error
+
+	SetBootDvdDrive(string, uint, uint, uint) error
+
+	UnmountDvdDrive(string, uint, uint) error
+
+	DeleteDvdDrive(string, uint, uint) error
+
+	MountFloppyDrive(string, string) error
+
+	UnmountFloppyDrive(string) error
+}

builder/hyperv/common/driver_ps_4.go

@@ -0,0 +1,308 @@
+package common
+
+import (
+	"fmt"
+	"log"
+	"runtime"
+	"strconv"
+	"strings"
+
+	"github.com/mitchellh/packer/powershell"
+	"github.com/mitchellh/packer/powershell/hyperv"
+)
+
+type HypervPS4Driver struct {
+}
+
+func NewHypervPS4Driver() (Driver, error) {
+	appliesTo := "Applies to Windows 8.1, Windows PowerShell 4.0, Windows Server 2012 R2 only"
+
+	// Check this is Windows
+	if runtime.GOOS != "windows" {
+		err := fmt.Errorf("%s", appliesTo)
+		return nil, err
+	}
+
+	ps4Driver := &HypervPS4Driver{}
+
+	if err := ps4Driver.Verify(); err != nil {
+		return nil, err
+	}
+
+	return ps4Driver, nil
+}
+
+func (d *HypervPS4Driver) IsRunning(vmName string) (bool, error) {
+	return hyperv.IsRunning(vmName)
+}
+
+func (d *HypervPS4Driver) IsOff(vmName string) (bool, error) {
+	return hyperv.IsOff(vmName)
+}
+
+func (d *HypervPS4Driver) Uptime(vmName string) (uint64, error) {
+	return hyperv.Uptime(vmName)
+}
+
+// Start starts a VM specified by the name given.
+func (d *HypervPS4Driver) Start(vmName string) error {
+	return hyperv.StartVirtualMachine(vmName)
+}
+
+// Stop stops a VM specified by the name given.
+func (d *HypervPS4Driver) Stop(vmName string) error {
+	return hyperv.StopVirtualMachine(vmName)
+}
+
+func (d *HypervPS4Driver) Verify() error {
+
+	if err := d.verifyPSVersion(); err != nil {
+		return err
+	}
+
+	if err := d.verifyPSHypervModule(); err != nil {
+		return err
+	}
+
+	if err := d.verifyElevatedMode(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// Get mac address for VM.
+func (d *HypervPS4Driver) Mac(vmName string) (string, error) {
+	res, err := hyperv.Mac(vmName)
+
+	if err != nil {
+		return res, err
+	}
+
+	if res == "" {
+		err := fmt.Errorf("%s", "No mac address.")
+		return res, err
+	}
+
+	return res, err
+}
+
+// Get ip address for mac address.
+func (d *HypervPS4Driver) IpAddress(mac string) (string, error) {
+	res, err := hyperv.IpAddress(mac)
+
+	if err != nil {
+		return res, err
+	}
+
+	if res == "" {
+		err := fmt.Errorf("%s", "No ip address.")
+		return res, err
+	}
+	return res, err
+}
+
+// Get host name from ip address
+func (d *HypervPS4Driver) GetHostName(ip string) (string, error) {
+	return powershell.GetHostName(ip)
+}
+
+// Finds the IP address of a host adapter connected to switch
+func (d *HypervPS4Driver) GetHostAdapterIpAddressForSwitch(switchName string) (string, error) {
+	res, err := hyperv.GetHostAdapterIpAddressForSwitch(switchName)
+
+	if err != nil {
+		return res, err
+	}
+
+	if res == "" {
+		err := fmt.Errorf("%s", "No ip address.")
+		return res, err
+	}
+	return res, err
+}
+
+// Type scan codes to virtual keyboard of vm
+func (d *HypervPS4Driver) TypeScanCodes(vmName string, scanCodes string) error {
+	return hyperv.TypeScanCodes(vmName, scanCodes)
+}
+
+// Get network adapter address
+func (d *HypervPS4Driver) GetVirtualMachineNetworkAdapterAddress(vmName string) (string, error) {
+	return hyperv.GetVirtualMachineNetworkAdapterAddress(vmName)
+}
+
+//Set the vlan to use for switch
+func (d *HypervPS4Driver) SetNetworkAdapterVlanId(switchName string, vlanId string) error {
+	return hyperv.SetNetworkAdapterVlanId(switchName, vlanId)
+}
+
+//Set the vlan to use for machine
+func (d *HypervPS4Driver) SetVirtualMachineVlanId(vmName string, vlanId string) error {
+	return hyperv.SetVirtualMachineVlanId(vmName, vlanId)
+}
+
+func (d *HypervPS4Driver) UntagVirtualMachineNetworkAdapterVlan(vmName string, switchName string) error {
+	return hyperv.UntagVirtualMachineNetworkAdapterVlan(vmName, switchName)
+}
+
+func (d *HypervPS4Driver) CreateExternalVirtualSwitch(vmName string, switchName string) error {
+	return hyperv.CreateExternalVirtualSwitch(vmName, switchName)
+}
+
+func (d *HypervPS4Driver) GetVirtualMachineSwitchName(vmName string) (string, error) {
+	return hyperv.GetVirtualMachineSwitchName(vmName)
+}
+
+func (d *HypervPS4Driver) ConnectVirtualMachineNetworkAdapterToSwitch(vmName string, switchName string) error {
+	return hyperv.ConnectVirtualMachineNetworkAdapterToSwitch(vmName, switchName)
+}
+
+func (d *HypervPS4Driver) DeleteVirtualSwitch(switchName string) error {
+	return hyperv.DeleteVirtualSwitch(switchName)
+}
+
+func (d *HypervPS4Driver) CreateVirtualSwitch(switchName string, switchType string) (bool, error) {
+	return hyperv.CreateVirtualSwitch(switchName, switchType)
+}
+
+func (d *HypervPS4Driver) CreateVirtualMachine(vmName string, path string, ram int64, diskSize int64, switchName string, generation uint) error {
+	return hyperv.CreateVirtualMachine(vmName, path, ram, diskSize, switchName, generation)
+}
+
+func (d *HypervPS4Driver) DeleteVirtualMachine(vmName string) error {
+	return hyperv.DeleteVirtualMachine(vmName)
+}
+
+func (d *HypervPS4Driver) SetVirtualMachineCpuCount(vmName string, cpu uint) error {
+	return hyperv.SetVirtualMachineCpuCount(vmName, cpu)
+}
+
+func (d *HypervPS4Driver) SetVirtualMachineMacSpoofing(vmName string, enable bool) error {
+	return hyperv.SetVirtualMachineMacSpoofing(vmName, enable)
+}
+
+func (d *HypervPS4Driver) SetVirtualMachineDynamicMemory(vmName string, enable bool) error {
+	return hyperv.SetVirtualMachineDynamicMemory(vmName, enable)
+}
+
+func (d *HypervPS4Driver) SetVirtualMachineSecureBoot(vmName string, enable bool) error {
+	return hyperv.SetVirtualMachineSecureBoot(vmName, enable)
+}
+
+func (d *HypervPS4Driver) SetVirtualMachineVirtualizationExtensions(vmName string, enable bool) error {
+	return hyperv.SetVirtualMachineVirtualizationExtensions(vmName, enable)
+}
+
+func (d *HypervPS4Driver) EnableVirtualMachineIntegrationService(vmName string, integrationServiceName string) error {
+	return hyperv.EnableVirtualMachineIntegrationService(vmName, integrationServiceName)
+}
+
+func (d *HypervPS4Driver) ExportVirtualMachine(vmName string, path string) error {
+	return hyperv.ExportVirtualMachine(vmName, path)
+}
+
+func (d *HypervPS4Driver) CompactDisks(expPath string, vhdDir string) error {
+	return hyperv.CompactDisks(expPath, vhdDir)
+}
+
+func (d *HypervPS4Driver) CopyExportedVirtualMachine(expPath string, outputPath string, vhdDir string, vmDir string) error {
+	return hyperv.CopyExportedVirtualMachine(expPath, outputPath, vhdDir, vmDir)
+}
+
+func (d *HypervPS4Driver) RestartVirtualMachine(vmName string) error {
+	return hyperv.RestartVirtualMachine(vmName)
+}
+
+func (d *HypervPS4Driver) CreateDvdDrive(vmName string, isoPath string, generation uint) (uint, uint, error) {
+	return hyperv.CreateDvdDrive(vmName, isoPath, generation)
+}
+
+func (d *HypervPS4Driver) MountDvdDrive(vmName string, path string, controllerNumber uint, controllerLocation uint) error {
+	return hyperv.MountDvdDrive(vmName, path, controllerNumber, controllerLocation)
+}
+
+func (d *HypervPS4Driver) SetBootDvdDrive(vmName string, controllerNumber uint, controllerLocation uint, generation uint) error {
+	return hyperv.SetBootDvdDrive(vmName, controllerNumber, controllerLocation, generation)
+}
+
+func (d *HypervPS4Driver) UnmountDvdDrive(vmName string, controllerNumber uint, controllerLocation uint) error {
+	return hyperv.UnmountDvdDrive(vmName, controllerNumber, controllerLocation)
+}
+
+func (d *HypervPS4Driver) DeleteDvdDrive(vmName string, controllerNumber uint, controllerLocation uint) error {
+	return hyperv.DeleteDvdDrive(vmName, controllerNumber, controllerLocation)
+}
+
+func (d *HypervPS4Driver) MountFloppyDrive(vmName string, path string) error {
+	return hyperv.MountFloppyDrive(vmName, path)
+}
+
+func (d *HypervPS4Driver) UnmountFloppyDrive(vmName string) error {
+	return hyperv.UnmountFloppyDrive(vmName)
+}
+
+func (d *HypervPS4Driver) verifyPSVersion() error {
+
+	log.Printf("Enter method: %s", "verifyPSVersion")
+	// check PS is available and is of proper version
+	versionCmd := "$host.version.Major"
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(versionCmd)
+	if err != nil {
+		return err
+	}
+
+	versionOutput := strings.TrimSpace(string(cmdOut))
+	log.Printf("%s output: %s", versionCmd, versionOutput)
+
+	ver, err := strconv.ParseInt(versionOutput, 10, 32)
+
+	if err != nil {
+		return err
+	}
+
+	if ver < 4 {
+		err := fmt.Errorf("%s", "Windows PowerShell version 4.0 or higher is expected")
+		return err
+	}
+
+	return nil
+}
+
+func (d *HypervPS4Driver) verifyPSHypervModule() error {
+
+	log.Printf("Enter method: %s", "verifyPSHypervModule")
+
+	versionCmd := "function foo(){try{ $commands = Get-Command -Module Hyper-V;if($commands.Length -eq 0){return $false} }catch{return $false}; return $true} foo"
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(versionCmd)
+	if err != nil {
+		return err
+	}
+
+	res := strings.TrimSpace(string(cmdOut))
+
+	if res == "False" {
+		err := fmt.Errorf("%s", "PS Hyper-V module is not loaded. Make sure Hyper-V feature is on.")
+		return err
+	}
+
+	return nil
+}
+
+func (d *HypervPS4Driver) verifyElevatedMode() error {
+
+	log.Printf("Enter method: %s", "verifyElevatedMode")
+
+	isAdmin, _ := powershell.IsCurrentUserAnAdministrator()
+
+	if !isAdmin {
+		err := fmt.Errorf("%s", "Please restart your shell in elevated mode")
+		return err
+	}
+
+	return nil
+}

builder/hyperv/common/floppy_config.go

@@ -0,0 +1,19 @@
+package common
+
+import (
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+// FloppyConfig is configuration related to created floppy disks and attaching
+// them to a Parallels virtual machine.
+type FloppyConfig struct {
+	FloppyFiles []string `mapstructure:"floppy_files"`
+}
+
+func (c *FloppyConfig) Prepare(ctx *interpolate.Context) []error {
+	if c.FloppyFiles == nil {
+		c.FloppyFiles = make([]string, 0)
+	}
+
+	return nil
+}

builder/hyperv/common/floppy_config_test.go

@@ -0,0 +1,18 @@
+package common
+
+import (
+	"testing"
+)
+
+func TestFloppyConfigPrepare(t *testing.T) {
+	c := new(FloppyConfig)
+
+	errs := c.Prepare(testConfigTemplate(t))
+	if len(errs) > 0 {
+		t.Fatalf("err: %#v", errs)
+	}
+
+	if len(c.FloppyFiles) > 0 {
+		t.Fatal("should not have floppy files")
+	}
+}

builder/hyperv/common/output_config.go

@@ -0,0 +1,28 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/packer/common"
+	"github.com/mitchellh/packer/template/interpolate"
+	"os"
+)
+
+type OutputConfig struct {
+	OutputDir string `mapstructure:"output_directory"`
+}
+
+func (c *OutputConfig) Prepare(ctx *interpolate.Context, pc *common.PackerConfig) []error {
+	if c.OutputDir == "" {
+		c.OutputDir = fmt.Sprintf("output-%s", pc.PackerBuildName)
+	}
+
+	var errs []error
+	if !pc.PackerForce {
+		if _, err := os.Stat(c.OutputDir); err == nil {
+			errs = append(errs, fmt.Errorf(
+				"Output directory '%s' already exists. It must not exist.", c.OutputDir))
+		}
+	}
+
+	return errs
+}

builder/hyperv/common/output_config_test.go

@@ -0,0 +1,45 @@
+package common
+
+import (
+	"github.com/mitchellh/packer/common"
+	"io/ioutil"
+	"os"
+	"testing"
+)
+
+func TestOutputConfigPrepare(t *testing.T) {
+	c := new(OutputConfig)
+	if c.OutputDir != "" {
+		t.Fatalf("what: %s", c.OutputDir)
+	}
+
+	pc := &common.PackerConfig{PackerBuildName: "foo"}
+	errs := c.Prepare(testConfigTemplate(t), pc)
+	if len(errs) > 0 {
+		t.Fatalf("err: %#v", errs)
+	}
+
+	if c.OutputDir == "" {
+		t.Fatal("should have output dir")
+	}
+}
+
+func TestOutputConfigPrepare_exists(t *testing.T) {
+	td, err := ioutil.TempDir("", "packer")
+	if err != nil {
+		t.Fatalf("err: %s", err)
+	}
+	defer os.RemoveAll(td)
+
+	c := new(OutputConfig)
+	c.OutputDir = td
+
+	pc := &common.PackerConfig{
+		PackerBuildName: "foo",
+		PackerForce:     false,
+	}
+	errs := c.Prepare(testConfigTemplate(t), pc)
+	if len(errs) == 0 {
+		t.Fatal("should have errors")
+	}
+}

builder/hyperv/common/run_config.go

@@ -0,0 +1,32 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/packer/template/interpolate"
+	"time"
+)
+
+type RunConfig struct {
+	RawBootWait string `mapstructure:"boot_wait"`
+
+	BootWait time.Duration ``
+}
+
+func (c *RunConfig) Prepare(ctx *interpolate.Context) []error {
+	if c.RawBootWait == "" {
+		c.RawBootWait = "10s"
+	}
+
+	var errs []error
+	var err error
+
+	if c.RawBootWait != "" {
+		c.BootWait, err = time.ParseDuration(c.RawBootWait)
+		if err != nil {
+			errs = append(
+				errs, fmt.Errorf("Failed parsing boot_wait: %s", err))
+		}
+	}
+
+	return errs
+}

builder/hyperv/common/run_config_test.go

@@ -0,0 +1,37 @@
+package common
+
+import (
+	"testing"
+)
+
+func TestRunConfigPrepare_BootWait(t *testing.T) {
+	var c *RunConfig
+	var errs []error
+
+	// Test a default boot_wait
+	c = new(RunConfig)
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) > 0 {
+		t.Fatalf("should not have error: %s", errs)
+	}
+
+	if c.RawBootWait != "10s" {
+		t.Fatalf("bad value: %s", c.RawBootWait)
+	}
+
+	// Test with a bad boot_wait
+	c = new(RunConfig)
+	c.RawBootWait = "this is not good"
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) == 0 {
+		t.Fatalf("bad: %#v", errs)
+	}
+
+	// Test with a good one
+	c = new(RunConfig)
+	c.RawBootWait = "5s"
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) > 0 {
+		t.Fatalf("should not have error: %s", errs)
+	}
+}

builder/hyperv/common/shutdown_config.go

@@ -0,0 +1,30 @@
+package common
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+type ShutdownConfig struct {
+	ShutdownCommand    string `mapstructure:"shutdown_command"`
+	RawShutdownTimeout string `mapstructure:"shutdown_timeout"`
+
+	ShutdownTimeout time.Duration ``
+}
+
+func (c *ShutdownConfig) Prepare(ctx *interpolate.Context) []error {
+	if c.RawShutdownTimeout == "" {
+		c.RawShutdownTimeout = "5m"
+	}
+
+	var errs []error
+	var err error
+	c.ShutdownTimeout, err = time.ParseDuration(c.RawShutdownTimeout)
+	if err != nil {
+		errs = append(errs, fmt.Errorf("Failed parsing shutdown_timeout: %s", err))
+	}
+
+	return errs
+}

builder/hyperv/common/shutdown_config_test.go

@@ -0,0 +1,45 @@
+package common
+
+import (
+	"testing"
+	"time"
+)
+
+func testShutdownConfig() *ShutdownConfig {
+	return &ShutdownConfig{}
+}
+
+func TestShutdownConfigPrepare_ShutdownCommand(t *testing.T) {
+	var c *ShutdownConfig
+	var errs []error
+
+	c = testShutdownConfig()
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) > 0 {
+		t.Fatalf("err: %#v", errs)
+	}
+}
+
+func TestShutdownConfigPrepare_ShutdownTimeout(t *testing.T) {
+	var c *ShutdownConfig
+	var errs []error
+
+	// Test with a bad value
+	c = testShutdownConfig()
+	c.RawShutdownTimeout = "this is not good"
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) == 0 {
+		t.Fatalf("should have error")
+	}
+
+	// Test with a good one
+	c = testShutdownConfig()
+	c.RawShutdownTimeout = "5s"
+	errs = c.Prepare(testConfigTemplate(t))
+	if len(errs) > 0 {
+		t.Fatalf("err: %#v", errs)
+	}
+	if c.ShutdownTimeout != 5*time.Second {
+		t.Fatalf("bad: %s", c.ShutdownTimeout)
+	}
+}

builder/hyperv/common/ssh.go

@@ -0,0 +1,49 @@
+package common
+
+import (
+	"github.com/mitchellh/multistep"
+	commonssh "github.com/mitchellh/packer/common/ssh"
+	"github.com/mitchellh/packer/communicator/ssh"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+func CommHost(state multistep.StateBag) (string, error) {
+	vmName := state.Get("vmName").(string)
+	driver := state.Get("driver").(Driver)
+
+	mac, err := driver.Mac(vmName)
+	if err != nil {
+		return "", err
+	}
+
+	ip, err := driver.IpAddress(mac)
+	if err != nil {
+		return "", err
+	}
+
+	return ip, nil
+}
+
+func SSHConfigFunc(config *SSHConfig) func(multistep.StateBag) (*gossh.ClientConfig, error) {
+	return func(state multistep.StateBag) (*gossh.ClientConfig, error) {
+		auth := []gossh.AuthMethod{
+			gossh.Password(config.Comm.SSHPassword),
+			gossh.KeyboardInteractive(
+				ssh.PasswordKeyboardInteractive(config.Comm.SSHPassword)),
+		}
+
+		if config.Comm.SSHPrivateKey != "" {
+			signer, err := commonssh.FileSigner(config.Comm.SSHPrivateKey)
+			if err != nil {
+				return nil, err
+			}
+
+			auth = append(auth, gossh.PublicKeys(signer))
+		}
+
+		return &gossh.ClientConfig{
+			User: config.Comm.SSHUsername,
+			Auth: auth,
+		}, nil
+	}
+}

builder/hyperv/common/ssh_config.go

@@ -0,0 +1,14 @@
+package common
+
+import (
+	"github.com/mitchellh/packer/helper/communicator"
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+type SSHConfig struct {
+	Comm communicator.Config `mapstructure:",squash"`
+}
+
+func (c *SSHConfig) Prepare(ctx *interpolate.Context) []error {
+	return c.Comm.Prepare(ctx)
+}

builder/hyperv/common/step_configure_ip.go

@@ -0,0 +1,75 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+	"strings"
+	"time"
+)
+
+type StepConfigureIp struct {
+}
+
+func (s *StepConfigureIp) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error configuring ip address: %s"
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Configuring ip address...")
+
+	count := 60
+	var duration time.Duration = 1
+	sleepTime := time.Minute * duration
+	var ip string
+
+	for count != 0 {
+		cmdOut, err := driver.GetVirtualMachineNetworkAdapterAddress(vmName)
+		if err != nil {
+			err := fmt.Errorf(errorMsg, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		ip = strings.TrimSpace(string(cmdOut))
+
+		if ip != "False" {
+			break
+		}
+
+		log.Println(fmt.Sprintf("Waiting for another %v minutes...", uint(duration)))
+		time.Sleep(sleepTime)
+		count--
+	}
+
+	if count == 0 {
+		err := fmt.Errorf(errorMsg, "IP address assigned to the adapter is empty")
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("ip address is " + ip)
+
+	hostName, err := driver.GetHostName(ip)
+	if err != nil {
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("hostname is " + hostName)
+
+	state.Put("ip", ip)
+	state.Put("hostname", hostName)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepConfigureIp) Cleanup(state multistep.StateBag) {
+	// do nothing
+}

builder/hyperv/common/step_configure_vlan.go

@@ -0,0 +1,52 @@
+package common
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepConfigureVlan struct {
+	VlanId       string
+	SwitchVlanId string
+}
+
+func (s *StepConfigureVlan) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error configuring vlan: %s"
+	vmName := state.Get("vmName").(string)
+	switchName := state.Get("SwitchName").(string)
+	vlanId := s.VlanId
+	switchVlanId := s.SwitchVlanId
+
+	ui.Say("Configuring vlan...")
+
+	if switchVlanId != "" {
+		err := driver.SetNetworkAdapterVlanId(switchName, vlanId)
+		if err != nil {
+			err := fmt.Errorf(errorMsg, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	if vlanId != "" {
+		err := driver.SetVirtualMachineVlanId(vmName, vlanId)
+		if err != nil {
+			err := fmt.Errorf(errorMsg, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepConfigureVlan) Cleanup(state multistep.StateBag) {
+	//do nothing
+}

builder/hyperv/common/step_create_external_switch.go

@@ -0,0 +1,103 @@
+package common
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/common/uuid"
+	"github.com/mitchellh/packer/packer"
+)
+
+// This step creates switch for VM.
+//
+// Produces:
+//   SwitchName string - The name of the Switch
+type StepCreateExternalSwitch struct {
+	SwitchName    string
+	oldSwitchName string
+}
+
+func (s *StepCreateExternalSwitch) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	vmName := state.Get("vmName").(string)
+	errorMsg := "Error createing external switch: %s"
+	var err error
+
+	ui.Say("Creating external switch...")
+
+	packerExternalSwitchName := "paes_" + uuid.TimeOrderedUUID()
+
+	err = driver.CreateExternalVirtualSwitch(vmName, packerExternalSwitchName)
+	if err != nil {
+		err := fmt.Errorf("Error creating switch: %s", err)
+		state.Put(errorMsg, err)
+		ui.Error(err.Error())
+		s.SwitchName = ""
+		return multistep.ActionHalt
+	}
+
+	switchName, err := driver.GetVirtualMachineSwitchName(vmName)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	if len(switchName) == 0 {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", "Can't get the VM switch name")
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("External switch name is: '" + switchName + "'")
+
+	if switchName != packerExternalSwitchName {
+		s.SwitchName = ""
+	} else {
+		s.SwitchName = packerExternalSwitchName
+		s.oldSwitchName = state.Get("SwitchName").(string)
+	}
+
+	// Set the final name in the state bag so others can use it
+	state.Put("SwitchName", switchName)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCreateExternalSwitch) Cleanup(state multistep.StateBag) {
+	if s.SwitchName == "" {
+		return
+	}
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Unregistering and deleting external switch...")
+
+	var err error = nil
+
+	errMsg := "Error deleting external switch: %s"
+
+	// connect the vm to the old switch
+	if s.oldSwitchName == "" {
+		ui.Error(fmt.Sprintf(errMsg, "the old switch name is empty"))
+		return
+	}
+
+	err = driver.ConnectVirtualMachineNetworkAdapterToSwitch(vmName, s.oldSwitchName)
+	if err != nil {
+		ui.Error(fmt.Sprintf(errMsg, err))
+		return
+	}
+
+	state.Put("SwitchName", s.oldSwitchName)
+
+	err = driver.DeleteVirtualSwitch(s.SwitchName)
+	if err != nil {
+		ui.Error(fmt.Sprintf(errMsg, err))
+	}
+}

builder/hyperv/common/step_create_switch.go

@@ -0,0 +1,78 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+const (
+	SwitchTypeInternal = "Internal"
+	SwitchTypePrivate  = "Private"
+	DefaultSwitchType  = SwitchTypeInternal
+)
+
+// This step creates switch for VM.
+//
+// Produces:
+//   SwitchName string - The name of the Switch
+type StepCreateSwitch struct {
+	// Specifies the name of the switch to be created.
+	SwitchName string
+	// Specifies the type of the switch to be created. Allowed values are Internal and Private. To create an External
+	// virtual switch, specify either the NetAdapterInterfaceDescription or the NetAdapterName parameter, which
+	// implicitly set the type of the virtual switch to External.
+	SwitchType string
+	// Specifies the name of the network adapter to be bound to the switch to be created.
+	NetAdapterName string
+	// Specifies the interface description of the network adapter to be bound to the switch to be created.
+	NetAdapterInterfaceDescription string
+
+	createdSwitch bool
+}
+
+func (s *StepCreateSwitch) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	if len(s.SwitchType) == 0 {
+		s.SwitchType = DefaultSwitchType
+	}
+
+	ui.Say(fmt.Sprintf("Creating switch '%v' if required...", s.SwitchName))
+
+	createdSwitch, err := driver.CreateVirtualSwitch(s.SwitchName, s.SwitchType)
+	if err != nil {
+		err := fmt.Errorf("Error creating switch: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		s.SwitchName = ""
+		return multistep.ActionHalt
+	}
+
+	s.createdSwitch = createdSwitch
+
+	if !s.createdSwitch {
+		ui.Say(fmt.Sprintf("    switch '%v' already exists. Will not delete on cleanup...", s.SwitchName))
+	}
+
+	// Set the final name in the state bag so others can use it
+	state.Put("SwitchName", s.SwitchName)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCreateSwitch) Cleanup(state multistep.StateBag) {
+	if len(s.SwitchName) == 0 || !s.createdSwitch {
+		return
+	}
+
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	ui.Say("Unregistering and deleting switch...")
+
+	err := driver.DeleteVirtualSwitch(s.SwitchName)
+	if err != nil {
+		ui.Error(fmt.Sprintf("Error deleting switch: %s", err))
+	}
+}

builder/hyperv/common/step_create_tempdir.go

@@ -0,0 +1,51 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"io/ioutil"
+	"os"
+)
+
+type StepCreateTempDir struct {
+	dirPath string
+}
+
+func (s *StepCreateTempDir) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Creating temporary directory...")
+
+	tempDir := os.TempDir()
+	packerTempDir, err := ioutil.TempDir(tempDir, "packerhv")
+	if err != nil {
+		err := fmt.Errorf("Error creating temporary directory: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	s.dirPath = packerTempDir
+	state.Put("packerTempDir", packerTempDir)
+
+	//	ui.Say("packerTempDir = '" + packerTempDir + "'")
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCreateTempDir) Cleanup(state multistep.StateBag) {
+	if s.dirPath == "" {
+		return
+	}
+
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Deleting temporary directory...")
+
+	err := os.RemoveAll(s.dirPath)
+
+	if err != nil {
+		ui.Error(fmt.Sprintf("Error deleting temporary directory: %s", err))
+	}
+}

builder/hyperv/common/step_create_vm.go

@@ -0,0 +1,114 @@
+package common
+
+import (
+	"fmt"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+// This step creates the actual virtual machine.
+//
+// Produces:
+//   VMName string - The name of the VM
+type StepCreateVM struct {
+	VMName                         string
+	SwitchName                     string
+	RamSize                        uint
+	DiskSize                       uint
+	Generation                     uint
+	Cpu                            uint
+	EnableMacSpoofing              bool
+	EnableDynamicMemory            bool
+	EnableSecureBoot               bool
+	EnableVirtualizationExtensions bool
+}
+
+func (s *StepCreateVM) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	ui.Say("Creating virtual machine...")
+
+	path := state.Get("packerTempDir").(string)
+
+	// convert the MB to bytes
+	ramSize := int64(s.RamSize * 1024 * 1024)
+	diskSize := int64(s.DiskSize * 1024 * 1024)
+
+	err := driver.CreateVirtualMachine(s.VMName, path, ramSize, diskSize, s.SwitchName, s.Generation)
+	if err != nil {
+		err := fmt.Errorf("Error creating virtual machine: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	err = driver.SetVirtualMachineCpuCount(s.VMName, s.Cpu)
+	if err != nil {
+		err := fmt.Errorf("Error creating setting virtual machine cpu: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	if s.EnableDynamicMemory {
+		err = driver.SetVirtualMachineDynamicMemory(s.VMName, s.EnableDynamicMemory)
+		if err != nil {
+			err := fmt.Errorf("Error creating setting virtual machine dynamic memory: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	if s.EnableMacSpoofing {
+		err = driver.SetVirtualMachineMacSpoofing(s.VMName, s.EnableMacSpoofing)
+		if err != nil {
+			err := fmt.Errorf("Error creating setting virtual machine mac spoofing: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	if s.Generation == 2 {
+		err = driver.SetVirtualMachineSecureBoot(s.VMName, s.EnableSecureBoot)
+		if err != nil {
+			err := fmt.Errorf("Error setting secure boot: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	if s.EnableVirtualizationExtensions {
+		//This is only supported on Windows 10 and Windows Server 2016 onwards
+		err = driver.SetVirtualMachineVirtualizationExtensions(s.VMName, s.EnableVirtualizationExtensions)
+		if err != nil {
+			err := fmt.Errorf("Error creating setting virtual machine virtualization extensions: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	// Set the final name in the state bag so others can use it
+	state.Put("vmName", s.VMName)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepCreateVM) Cleanup(state multistep.StateBag) {
+	if s.VMName == "" {
+		return
+	}
+
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	ui.Say("Unregistering and deleting virtual machine...")
+
+	err := driver.DeleteVirtualMachine(s.VMName)
+	if err != nil {
+		ui.Error(fmt.Sprintf("Error deleting virtual machine: %s", err))
+	}
+}

builder/hyperv/common/step_disable_vlan.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepDisableVlan struct {
+}
+
+func (s *StepDisableVlan) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error disabling vlan: %s"
+	vmName := state.Get("vmName").(string)
+	switchName := state.Get("SwitchName").(string)
+
+	ui.Say("Disabling vlan...")
+
+	err := driver.UntagVirtualMachineNetworkAdapterVlan(vmName, switchName)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepDisableVlan) Cleanup(state multistep.StateBag) {
+	//do nothing
+}

builder/hyperv/common/step_enable_integration_service.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepEnableIntegrationService struct {
+	name string
+}
+
+func (s *StepEnableIntegrationService) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	ui.Say("Enabling Integration Service...")
+
+	vmName := state.Get("vmName").(string)
+	s.name = "Guest Service Interface"
+
+	err := driver.EnableVirtualMachineIntegrationService(vmName, s.name)
+
+	if err != nil {
+		err := fmt.Errorf("Error enabling Integration Service: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepEnableIntegrationService) Cleanup(state multistep.StateBag) {
+	// do nothing
+}

builder/hyperv/common/step_export_vm.go

@@ -0,0 +1,85 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"io/ioutil"
+	"path/filepath"
+)
+
+const (
+	vhdDir string = "Virtual Hard Disks"
+	vmDir  string = "Virtual Machines"
+)
+
+type StepExportVm struct {
+	OutputDir      string
+	SkipCompaction bool
+}
+
+func (s *StepExportVm) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	var err error
+	var errorMsg string
+
+	vmName := state.Get("vmName").(string)
+	tmpPath := state.Get("packerTempDir").(string)
+	outputPath := s.OutputDir
+
+	// create temp path to export vm
+	errorMsg = "Error creating temp export path: %s"
+	vmExportPath, err := ioutil.TempDir(tmpPath, "export")
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("Exporting vm...")
+
+	err = driver.ExportVirtualMachine(vmName, vmExportPath)
+	if err != nil {
+		errorMsg = "Error exporting vm: %s"
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	// copy to output dir
+	expPath := filepath.Join(vmExportPath, vmName)
+
+	if s.SkipCompaction {
+		ui.Say("Skipping disk compaction...")
+	} else {
+		ui.Say("Compacting disks...")
+		err = driver.CompactDisks(expPath, vhdDir)
+		if err != nil {
+			errorMsg = "Error compacting disks: %s"
+			err := fmt.Errorf(errorMsg, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	ui.Say("Coping to output dir...")
+	err = driver.CopyExportedVirtualMachine(expPath, outputPath, vhdDir, vmDir)
+	if err != nil {
+		errorMsg = "Error exporting vm: %s"
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepExportVm) Cleanup(state multistep.StateBag) {
+	// do nothing
+}

builder/hyperv/common/step_mount_dvddrive.go

@@ -0,0 +1,91 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+)
+
+type StepMountDvdDrive struct {
+	Generation uint
+}
+
+func (s *StepMountDvdDrive) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error mounting dvd drive: %s"
+	vmName := state.Get("vmName").(string)
+	isoPath := state.Get("iso_path").(string)
+
+	// should be able to mount up to 60 additional iso images using SCSI
+	// but Windows would only allow a max of 22 due to available drive letters
+	// Will Windows assign DVD drives to A: and B: ?
+
+	// For IDE, there are only 2 controllers (0,1) with 2 locations each (0,1)
+
+	var dvdControllerProperties DvdControllerProperties
+	controllerNumber, controllerLocation, err := driver.CreateDvdDrive(vmName, isoPath, s.Generation)
+	if err != nil {
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	dvdControllerProperties.ControllerNumber = controllerNumber
+	dvdControllerProperties.ControllerLocation = controllerLocation
+	dvdControllerProperties.Existing = false
+
+	state.Put("os.dvd.properties", dvdControllerProperties)
+
+	ui.Say(fmt.Sprintf("Setting boot drive to os dvd drive %s ...", isoPath))
+	err = driver.SetBootDvdDrive(vmName, controllerNumber, controllerLocation, s.Generation)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say(fmt.Sprintf("Mounting os dvd drive %s ...", isoPath))
+	err = driver.MountDvdDrive(vmName, isoPath, controllerNumber, controllerLocation)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepMountDvdDrive) Cleanup(state multistep.StateBag) {
+	dvdControllerState := state.Get("os.dvd.properties")
+
+	if dvdControllerState == nil {
+		return
+	}
+
+	dvdController := dvdControllerState.(DvdControllerProperties)
+	driver := state.Get("driver").(Driver)
+	vmName := state.Get("vmName").(string)
+	ui := state.Get("ui").(packer.Ui)
+	errorMsg := "Error unmounting os dvd drive: %s"
+
+	ui.Say("Clean up os dvd drive...")
+
+	if dvdController.Existing {
+		err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error unmounting dvd drive: %s", err)
+			log.Print(fmt.Sprintf(errorMsg, err))
+		}
+	} else {
+		err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error deleting dvd drive: %s", err)
+			log.Print(fmt.Sprintf(errorMsg, err))
+		}
+	}
+}

builder/hyperv/common/step_mount_floppydrive.go

@@ -0,0 +1,118 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+)
+
+const (
+	FloppyFileName = "assets.vfd"
+)
+
+type StepMountFloppydrive struct {
+	Generation uint
+	floppyPath string
+}
+
+func (s *StepMountFloppydrive) Run(state multistep.StateBag) multistep.StepAction {
+	if s.Generation > 1 {
+		return multistep.ActionContinue
+	}
+
+	driver := state.Get("driver").(Driver)
+
+	// Determine if we even have a floppy disk to attach
+	var floppyPath string
+	if floppyPathRaw, ok := state.GetOk("floppy_path"); ok {
+		floppyPath = floppyPathRaw.(string)
+	} else {
+		log.Println("No floppy disk, not attaching.")
+		return multistep.ActionContinue
+	}
+
+	// Hyper-V is really dumb and can't figure out the format of the file
+	// without an extension, so we need to add the "vfd" extension to the
+	// floppy.
+	floppyPath, err := s.copyFloppy(floppyPath)
+	if err != nil {
+		state.Put("error", fmt.Errorf("Error preparing floppy: %s", err))
+		return multistep.ActionHalt
+	}
+
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Mounting floppy drive...")
+
+	err = driver.MountFloppyDrive(vmName, floppyPath)
+	if err != nil {
+		state.Put("error", fmt.Errorf("Error mounting floppy drive: %s", err))
+		return multistep.ActionHalt
+	}
+
+	// Track the path so that we can unregister it from Hyper-V later
+	s.floppyPath = floppyPath
+
+	return multistep.ActionContinue
+}
+
+func (s *StepMountFloppydrive) Cleanup(state multistep.StateBag) {
+	if s.Generation > 1 {
+		return
+	}
+	driver := state.Get("driver").(Driver)
+	if s.floppyPath == "" {
+		return
+	}
+
+	errorMsg := "Error unmounting floppy drive: %s"
+
+	vmName := state.Get("vmName").(string)
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Cleanup floppy drive...")
+
+	err := driver.UnmountFloppyDrive(vmName)
+	if err != nil {
+		log.Print(fmt.Sprintf(errorMsg, err))
+	}
+
+	err = os.Remove(s.floppyPath)
+
+	if err != nil {
+		log.Print(fmt.Sprintf(errorMsg, err))
+	}
+}
+
+func (s *StepMountFloppydrive) copyFloppy(path string) (string, error) {
+	tempdir, err := ioutil.TempDir("", "packer")
+	if err != nil {
+		return "", err
+	}
+
+	floppyPath := filepath.Join(tempdir, "floppy.vfd")
+	f, err := os.Create(floppyPath)
+	if err != nil {
+		return "", err
+	}
+	defer f.Close()
+
+	sourceF, err := os.Open(path)
+	if err != nil {
+		return "", err
+	}
+	defer sourceF.Close()
+
+	log.Printf("Copying floppy to temp location: %s", floppyPath)
+	if _, err := io.Copy(f, sourceF); err != nil {
+		return "", err
+	}
+
+	return floppyPath, nil
+}

builder/hyperv/common/step_mount_guest_additions.go

@@ -0,0 +1,92 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+)
+
+type StepMountGuestAdditions struct {
+	GuestAdditionsMode string
+	GuestAdditionsPath string
+	Generation         uint
+}
+
+func (s *StepMountGuestAdditions) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
+	if s.GuestAdditionsMode != "attach" {
+		ui.Say("Skipping mounting Integration Services Setup Disk...")
+		return multistep.ActionContinue
+	}
+
+	driver := state.Get("driver").(Driver)
+	ui.Say("Mounting Integration Services Setup Disk...")
+
+	vmName := state.Get("vmName").(string)
+
+	// should be able to mount up to 60 additional iso images using SCSI
+	// but Windows would only allow a max of 22 due to available drive letters
+	// Will Windows assign DVD drives to A: and B: ?
+
+	// For IDE, there are only 2 controllers (0,1) with 2 locations each (0,1)
+
+	var dvdControllerProperties DvdControllerProperties
+
+	controllerNumber, controllerLocation, err := driver.CreateDvdDrive(vmName, s.GuestAdditionsPath, s.Generation)
+	if err != nil {
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	dvdControllerProperties.ControllerNumber = controllerNumber
+	dvdControllerProperties.ControllerLocation = controllerLocation
+	dvdControllerProperties.Existing = false
+	state.Put("guest.dvd.properties", dvdControllerProperties)
+
+	ui.Say(fmt.Sprintf("Mounting Integration Services dvd drive %s ...", s.GuestAdditionsPath))
+	err = driver.MountDvdDrive(vmName, s.GuestAdditionsPath, controllerNumber, controllerLocation)
+	if err != nil {
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	log.Println(fmt.Sprintf("ISO %s mounted on DVD controller %v, location %v", s.GuestAdditionsPath, controllerNumber, controllerLocation))
+
+	return multistep.ActionContinue
+}
+
+func (s *StepMountGuestAdditions) Cleanup(state multistep.StateBag) {
+	if s.GuestAdditionsMode != "attach" {
+		return
+	}
+
+	dvdControllerState := state.Get("guest.dvd.properties")
+
+	if dvdControllerState == nil {
+		return
+	}
+
+	dvdController := dvdControllerState.(DvdControllerProperties)
+	ui := state.Get("ui").(packer.Ui)
+	driver := state.Get("driver").(Driver)
+	vmName := state.Get("vmName").(string)
+	errorMsg := "Error unmounting Integration Services dvd drive: %s"
+
+	ui.Say("Cleanup Integration Services dvd drive...")
+
+	if dvdController.Existing {
+		err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			log.Print(fmt.Sprintf(errorMsg, err))
+		}
+	} else {
+		err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			log.Print(fmt.Sprintf(errorMsg, err))
+		}
+	}
+}

builder/hyperv/common/step_mount_secondary_dvd_images.go

@@ -0,0 +1,94 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+)
+
+type StepMountSecondaryDvdImages struct {
+	IsoPaths   []string
+	Generation uint
+}
+
+type DvdControllerProperties struct {
+	ControllerNumber   uint
+	ControllerLocation uint
+	Existing           bool
+}
+
+func (s *StepMountSecondaryDvdImages) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	ui.Say("Mounting secondary DVD images...")
+
+	vmName := state.Get("vmName").(string)
+
+	// should be able to mount up to 60 additional iso images using SCSI
+	// but Windows would only allow a max of 22 due to available drive letters
+	// Will Windows assign DVD drives to A: and B: ?
+
+	// For IDE, there are only 2 controllers (0,1) with 2 locations each (0,1)
+	var dvdProperties []DvdControllerProperties
+
+	for _, isoPath := range s.IsoPaths {
+		var properties DvdControllerProperties
+
+		controllerNumber, controllerLocation, err := driver.CreateDvdDrive(vmName, isoPath, s.Generation)
+		if err != nil {
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		properties.ControllerNumber = controllerNumber
+		properties.ControllerLocation = controllerLocation
+		properties.Existing = false
+		dvdProperties = append(dvdProperties, properties)
+		state.Put("secondary.dvd.properties", dvdProperties)
+
+		ui.Say(fmt.Sprintf("Mounting secondary dvd drive %s ...", isoPath))
+		err = driver.MountDvdDrive(vmName, isoPath, controllerNumber, controllerLocation)
+		if err != nil {
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		log.Println(fmt.Sprintf("ISO %s mounted on DVD controller %v, location %v", isoPath, controllerNumber, controllerLocation))
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepMountSecondaryDvdImages) Cleanup(state multistep.StateBag) {
+	dvdControllersState := state.Get("secondary.dvd.properties")
+
+	if dvdControllersState == nil {
+		return
+	}
+
+	dvdControllers := dvdControllersState.([]DvdControllerProperties)
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+	errorMsg := "Error unmounting secondary dvd drive: %s"
+
+	ui.Say("Clean up secondary dvd drives...")
+
+	for _, dvdController := range dvdControllers {
+
+		if dvdController.Existing {
+			err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+			if err != nil {
+				log.Print(fmt.Sprintf(errorMsg, err))
+			}
+		} else {
+			err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+			if err != nil {
+				log.Print(fmt.Sprintf(errorMsg, err))
+			}
+		}
+	}
+}

builder/hyperv/common/step_output_dir.go

@@ -0,0 +1,67 @@
+package common
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+// StepOutputDir sets up the output directory by creating it if it does
+// not exist, deleting it if it does exist and we're forcing, and cleaning
+// it up when we're done with it.
+type StepOutputDir struct {
+	Force bool
+	Path  string
+}
+
+func (s *StepOutputDir) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
+	if _, err := os.Stat(s.Path); err == nil && s.Force {
+		ui.Say("Deleting previous output directory...")
+		os.RemoveAll(s.Path)
+	}
+
+	// Create the directory
+	if err := os.MkdirAll(s.Path, 0755); err != nil {
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+
+	// Make sure we can write in the directory
+	f, err := os.Create(filepath.Join(s.Path, "_packer_perm_check"))
+	if err != nil {
+		err = fmt.Errorf("Couldn't write to output directory: %s", err)
+		state.Put("error", err)
+		return multistep.ActionHalt
+	}
+	f.Close()
+	os.Remove(f.Name())
+
+	return multistep.ActionContinue
+}
+
+func (s *StepOutputDir) Cleanup(state multistep.StateBag) {
+	_, cancelled := state.GetOk(multistep.StateCancelled)
+	_, halted := state.GetOk(multistep.StateHalted)
+
+	if cancelled || halted {
+		ui := state.Get("ui").(packer.Ui)
+
+		ui.Say("Deleting output directory...")
+		for i := 0; i < 5; i++ {
+			err := os.RemoveAll(s.Path)
+			if err == nil {
+				break
+			}
+
+			log.Printf("Error removing output dir: %s", err)
+			time.Sleep(2 * time.Second)
+		}
+	}
+}

builder/hyperv/common/step_polling_installation.go

@@ -0,0 +1,79 @@
+package common
+
+import (
+	"bytes"
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+	"os/exec"
+	"strings"
+	"time"
+)
+
+const port string = "13000"
+
+type StepPollingInstalation struct {
+	step int
+}
+
+func (s *StepPollingInstalation) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error polling VM: %s"
+	vmIp := state.Get("ip").(string)
+
+	ui.Say("Start polling VM to check the installation is complete...")
+	host := "'" + vmIp + "'," + port
+
+	var blockBuffer bytes.Buffer
+	blockBuffer.WriteString("Invoke-Command -scriptblock {function foo(){try{$client=New-Object System.Net.Sockets.TcpClient(")
+	blockBuffer.WriteString(host)
+	blockBuffer.WriteString(") -ErrorAction SilentlyContinue;if($client -eq $null){return $false}}catch{return $false}return $true} foo}")
+
+	count := 60
+	var duration time.Duration = 20
+	sleepTime := time.Second * duration
+
+	var res string
+
+	for count > 0 {
+		log.Println(fmt.Sprintf("Connecting vm (%s)...", host))
+		cmd := exec.Command("powershell", blockBuffer.String())
+		cmdOut, err := cmd.Output()
+		if err != nil {
+			err := fmt.Errorf(errorMsg, err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		res = strings.TrimSpace(string(cmdOut))
+
+		if res != "False" {
+			ui.Say("Signal was received from the VM")
+			// Sleep before starting provision
+			time.Sleep(time.Second * 30)
+			break
+		}
+
+		log.Println(fmt.Sprintf("Slipping for more %v seconds...", uint(duration)))
+		time.Sleep(sleepTime)
+		count--
+	}
+
+	if count == 0 {
+		err := fmt.Errorf(errorMsg, "a signal from vm was not received in a given time period ")
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("The installation complete")
+
+	return multistep.ActionContinue
+}
+
+func (s *StepPollingInstalation) Cleanup(state multistep.StateBag) {
+
+}

builder/hyperv/common/step_reboot_vm.go

@@ -0,0 +1,40 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"time"
+)
+
+type StepRebootVm struct {
+}
+
+func (s *StepRebootVm) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	errorMsg := "Error rebooting vm: %s"
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Rebooting vm...")
+
+	err := driver.RestartVirtualMachine(vmName)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say("Waiting the VM to complete rebooting (2 minutes)...")
+
+	sleepTime := time.Minute * 2
+	time.Sleep(sleepTime)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepRebootVm) Cleanup(state multistep.StateBag) {
+	// do nothing
+}

builder/hyperv/common/step_run.go

@@ -0,0 +1,65 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"time"
+)
+
+type StepRun struct {
+	BootWait time.Duration
+
+	vmName string
+}
+
+func (s *StepRun) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Starting the virtual machine...")
+
+	err := driver.Start(vmName)
+	if err != nil {
+		err := fmt.Errorf("Error starting vm: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	s.vmName = vmName
+
+	if int64(s.BootWait) > 0 {
+		ui.Say(fmt.Sprintf("Waiting %s for boot...", s.BootWait))
+		wait := time.After(s.BootWait)
+	WAITLOOP:
+		for {
+			select {
+			case <-wait:
+				break WAITLOOP
+			case <-time.After(1 * time.Second):
+				if _, ok := state.GetOk(multistep.StateCancelled); ok {
+					return multistep.ActionHalt
+				}
+			}
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepRun) Cleanup(state multistep.StateBag) {
+	if s.vmName == "" {
+		return
+	}
+
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	if running, _ := driver.IsRunning(s.vmName); running {
+		if err := driver.Stop(s.vmName); err != nil {
+			ui.Error(fmt.Sprintf("Error shutting down VM: %s", err))
+		}
+	}
+}

builder/hyperv/common/step_shutdown.go

@@ -0,0 +1,104 @@
+package common
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"log"
+	"time"
+)
+
+// This step shuts down the machine. It first attempts to do so gracefully,
+// but ultimately forcefully shuts it down if that fails.
+//
+// Uses:
+//   communicator packer.Communicator
+//   dir OutputDir
+//   driver Driver
+//   ui     packer.Ui
+//   vmx_path string
+//
+// Produces:
+//   <nothing>
+type StepShutdown struct {
+	Command string
+	Timeout time.Duration
+}
+
+func (s *StepShutdown) Run(state multistep.StateBag) multistep.StepAction {
+
+	comm := state.Get("communicator").(packer.Communicator)
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	if s.Command != "" {
+		ui.Say("Gracefully halting virtual machine...")
+		log.Printf("Executing shutdown command: %s", s.Command)
+
+		var stdout, stderr bytes.Buffer
+		cmd := &packer.RemoteCmd{
+			Command: s.Command,
+			Stdout:  &stdout,
+			Stderr:  &stderr,
+		}
+		if err := comm.Start(cmd); err != nil {
+			err := fmt.Errorf("Failed to send shutdown command: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		// Wait for the command to run
+		cmd.Wait()
+
+		stderrString := stderr.String()
+		stdoutString := stdout.String()
+
+		// If the command failed to run, notify the user in some way.
+		if !(cmd.ExitStatus == 0 || (cmd.ExitStatus == 1 && len(stderrString) == 0)) {
+			state.Put("error", fmt.Errorf(
+				"Shutdown command has not successful.\n\nExitStatus: %d\n\nStdout: %s\n\nStderr: %s",
+				cmd.ExitStatus, stdoutString, stderrString))
+			return multistep.ActionHalt
+		}
+
+		log.Printf("Shutdown stdout: %s", stdoutString)
+		log.Printf("Shutdown stderr: %s", stderrString)
+
+		// Wait for the machine to actually shut down
+		log.Printf("Waiting max %s for shutdown to complete", s.Timeout)
+		shutdownTimer := time.After(s.Timeout)
+		for {
+			running, _ := driver.IsRunning(vmName)
+			if !running {
+				break
+			}
+
+			select {
+			case <-shutdownTimer:
+				err := errors.New("Timeout while waiting for machine to shut down.")
+				state.Put("error", err)
+				ui.Error(err.Error())
+				return multistep.ActionHalt
+			default:
+				time.Sleep(150 * time.Millisecond)
+			}
+		}
+	} else {
+		ui.Say("Forcibly halting virtual machine...")
+		if err := driver.Stop(vmName); err != nil {
+			err := fmt.Errorf("Error stopping VM: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	log.Println("VM shut down.")
+	return multistep.ActionContinue
+}
+
+func (s *StepShutdown) Cleanup(state multistep.StateBag) {}

builder/hyperv/common/step_sleep.go

@@ -0,0 +1,28 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"time"
+)
+
+type StepSleep struct {
+	Minutes    time.Duration
+	ActionName string
+}
+
+func (s *StepSleep) Run(state multistep.StateBag) multistep.StepAction {
+	ui := state.Get("ui").(packer.Ui)
+
+	if len(s.ActionName) > 0 {
+		ui.Say(s.ActionName + "! Waiting for " + fmt.Sprintf("%v", uint(s.Minutes)) + " minutes to let the action to complete...")
+	}
+	time.Sleep(time.Minute * s.Minutes)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepSleep) Cleanup(state multistep.StateBag) {
+
+}

builder/hyperv/common/step_type_boot_command.go

@@ -0,0 +1,278 @@
+package common
+
+import (
+	"fmt"
+	"log"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+type bootCommandTemplateData struct {
+	HTTPIP   string
+	HTTPPort uint
+	Name     string
+}
+
+// This step "types" the boot command into the VM via the Hyper-V virtual keyboard
+type StepTypeBootCommand struct {
+	BootCommand []string
+	SwitchName  string
+	Ctx         interpolate.Context
+}
+
+func (s *StepTypeBootCommand) Run(state multistep.StateBag) multistep.StepAction {
+	httpPort := state.Get("http_port").(uint)
+	ui := state.Get("ui").(packer.Ui)
+	driver := state.Get("driver").(Driver)
+	vmName := state.Get("vmName").(string)
+
+	hostIp, err := driver.GetHostAdapterIpAddressForSwitch(s.SwitchName)
+
+	if err != nil {
+		err := fmt.Errorf("Error getting host adapter ip address: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	ui.Say(fmt.Sprintf("Host IP for the HyperV machine: %s", hostIp))
+
+	s.Ctx.Data = &bootCommandTemplateData{
+		hostIp,
+		httpPort,
+		vmName,
+	}
+
+	ui.Say("Typing the boot command...")
+	scanCodesToSend := []string{}
+
+	for _, command := range s.BootCommand {
+		command, err := interpolate.Render(command, &s.Ctx)
+
+		if err != nil {
+			err := fmt.Errorf("Error preparing boot command: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		scanCodesToSend = append(scanCodesToSend, scancodes(command)...)
+	}
+
+	scanCodesToSendString := strings.Join(scanCodesToSend, " ")
+
+	if err := driver.TypeScanCodes(vmName, scanCodesToSendString); err != nil {
+		err := fmt.Errorf("Error sending boot command: %s", err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+		return multistep.ActionHalt
+	}
+
+	return multistep.ActionContinue
+}
+
+func (*StepTypeBootCommand) Cleanup(multistep.StateBag) {}
+
+func scancodes(message string) []string {
+	// Scancodes reference: http://www.win.tue.nl/~aeb/linux/kbd/scancodes-1.html
+	//
+	// Scancodes represent raw keyboard output and are fed to the VM by using
+	// powershell to use Msvm_Keyboard
+	//
+	// Scancodes are recorded here in pairs. The first entry represents
+	// the key press and the second entry represents the key release and is
+	// derived from the first by the addition of 0x80.
+	special := make(map[string][]string)
+	special["<bs>"] = []string{"0e", "8e"}
+	special["<del>"] = []string{"53", "d3"}
+	special["<enter>"] = []string{"1c", "9c"}
+	special["<esc>"] = []string{"01", "81"}
+	special["<f1>"] = []string{"3b", "bb"}
+	special["<f2>"] = []string{"3c", "bc"}
+	special["<f3>"] = []string{"3d", "bd"}
+	special["<f4>"] = []string{"3e", "be"}
+	special["<f5>"] = []string{"3f", "bf"}
+	special["<f6>"] = []string{"40", "c0"}
+	special["<f7>"] = []string{"41", "c1"}
+	special["<f8>"] = []string{"42", "c2"}
+	special["<f9>"] = []string{"43", "c3"}
+	special["<f10>"] = []string{"44", "c4"}
+	special["<return>"] = []string{"1c", "9c"}
+	special["<tab>"] = []string{"0f", "8f"}
+	special["<up>"] = []string{"48", "c8"}
+	special["<down>"] = []string{"50", "d0"}
+	special["<left>"] = []string{"4b", "cb"}
+	special["<right>"] = []string{"4d", "cd"}
+	special["<spacebar>"] = []string{"39", "b9"}
+	special["<insert>"] = []string{"52", "d2"}
+	special["<home>"] = []string{"47", "c7"}
+	special["<end>"] = []string{"4f", "cf"}
+	special["<pageUp>"] = []string{"49", "c9"}
+	special["<pageDown>"] = []string{"51", "d1"}
+	special["<leftAlt>"] = []string{"38", "b8"}
+	special["<leftCtrl>"] = []string{"1d", "9d"}
+	special["<leftShift>"] = []string{"2a", "aa"}
+	special["<rightAlt>"] = []string{"e038", "e0b8"}
+	special["<rightCtrl>"] = []string{"e01d", "e09d"}
+	special["<rightShift>"] = []string{"36", "b6"}
+
+	shiftedChars := "~!@#$%^&*()_+{}|:\"<>?"
+
+	scancodeIndex := make(map[string]uint)
+	scancodeIndex["1234567890-="] = 0x02
+	scancodeIndex["!@#$%^&*()_+"] = 0x02
+	scancodeIndex["qwertyuiop[]"] = 0x10
+	scancodeIndex["QWERTYUIOP{}"] = 0x10
+	scancodeIndex["asdfghjkl;'`"] = 0x1e
+	scancodeIndex[`ASDFGHJKL:"~`] = 0x1e
+	scancodeIndex[`\zxcvbnm,./`] = 0x2b
+	scancodeIndex["|ZXCVBNM<>?"] = 0x2b
+	scancodeIndex[" "] = 0x39
+
+	scancodeMap := make(map[rune]uint)
+	for chars, start := range scancodeIndex {
+		var i uint = 0
+		for len(chars) > 0 {
+			r, size := utf8.DecodeRuneInString(chars)
+			chars = chars[size:]
+			scancodeMap[r] = start + i
+			i += 1
+		}
+	}
+
+	result := make([]string, 0, len(message)*2)
+	for len(message) > 0 {
+		var scancode []string
+
+		if strings.HasPrefix(message, "<leftAltOn>") {
+			scancode = []string{"38"}
+			message = message[len("<leftAltOn>"):]
+			log.Printf("Special code '<leftAltOn>' found, replacing with: 38")
+		}
+
+		if strings.HasPrefix(message, "<leftCtrlOn>") {
+			scancode = []string{"1d"}
+			message = message[len("<leftCtrlOn>"):]
+			log.Printf("Special code '<leftCtrlOn>' found, replacing with: 1d")
+		}
+
+		if strings.HasPrefix(message, "<leftShiftOn>") {
+			scancode = []string{"2a"}
+			message = message[len("<leftShiftOn>"):]
+			log.Printf("Special code '<leftShiftOn>' found, replacing with: 2a")
+		}
+
+		if strings.HasPrefix(message, "<leftAltOff>") {
+			scancode = []string{"b8"}
+			message = message[len("<leftAltOff>"):]
+			log.Printf("Special code '<leftAltOff>' found, replacing with: b8")
+		}
+
+		if strings.HasPrefix(message, "<leftCtrlOff>") {
+			scancode = []string{"9d"}
+			message = message[len("<leftCtrlOff>"):]
+			log.Printf("Special code '<leftCtrlOff>' found, replacing with: 9d")
+		}
+
+		if strings.HasPrefix(message, "<leftShiftOff>") {
+			scancode = []string{"aa"}
+			message = message[len("<leftShiftOff>"):]
+			log.Printf("Special code '<leftShiftOff>' found, replacing with: aa")
+		}
+
+		if strings.HasPrefix(message, "<rightAltOn>") {
+			scancode = []string{"e038"}
+			message = message[len("<rightAltOn>"):]
+			log.Printf("Special code '<rightAltOn>' found, replacing with: e038")
+		}
+
+		if strings.HasPrefix(message, "<rightCtrlOn>") {
+			scancode = []string{"e01d"}
+			message = message[len("<rightCtrlOn>"):]
+			log.Printf("Special code '<rightCtrlOn>' found, replacing with: e01d")
+		}
+
+		if strings.HasPrefix(message, "<rightShiftOn>") {
+			scancode = []string{"36"}
+			message = message[len("<rightShiftOn>"):]
+			log.Printf("Special code '<rightShiftOn>' found, replacing with: 36")
+		}
+
+		if strings.HasPrefix(message, "<rightAltOff>") {
+			scancode = []string{"e0b8"}
+			message = message[len("<rightAltOff>"):]
+			log.Printf("Special code '<rightAltOff>' found, replacing with: e0b8")
+		}
+
+		if strings.HasPrefix(message, "<rightCtrlOff>") {
+			scancode = []string{"e09d"}
+			message = message[len("<rightCtrlOff>"):]
+			log.Printf("Special code '<rightCtrlOff>' found, replacing with: e09d")
+		}
+
+		if strings.HasPrefix(message, "<rightShiftOff>") {
+			scancode = []string{"b6"}
+			message = message[len("<rightShiftOff>"):]
+			log.Printf("Special code '<rightShiftOff>' found, replacing with: b6")
+		}
+
+		if strings.HasPrefix(message, "<wait>") {
+			log.Printf("Special code <wait> found, will sleep 1 second at this point.")
+			scancode = []string{"wait"}
+			message = message[len("<wait>"):]
+		}
+
+		if strings.HasPrefix(message, "<wait5>") {
+			log.Printf("Special code <wait5> found, will sleep 5 seconds at this point.")
+			scancode = []string{"wait5"}
+			message = message[len("<wait5>"):]
+		}
+
+		if strings.HasPrefix(message, "<wait10>") {
+			log.Printf("Special code <wait10> found, will sleep 10 seconds at this point.")
+			scancode = []string{"wait10"}
+			message = message[len("<wait10>"):]
+		}
+
+		if scancode == nil {
+			for specialCode, specialValue := range special {
+				if strings.HasPrefix(message, specialCode) {
+					log.Printf("Special code '%s' found, replacing with: %s", specialCode, specialValue)
+					scancode = specialValue
+					message = message[len(specialCode):]
+					break
+				}
+			}
+		}
+
+		if scancode == nil {
+			r, size := utf8.DecodeRuneInString(message)
+			message = message[size:]
+			scancodeInt := scancodeMap[r]
+			keyShift := unicode.IsUpper(r) || strings.ContainsRune(shiftedChars, r)
+
+			scancode = make([]string, 0, 4)
+			if keyShift {
+				scancode = append(scancode, "2a")
+			}
+
+			scancode = append(scancode, fmt.Sprintf("%02x", scancodeInt))
+
+			if keyShift {
+				scancode = append(scancode, "aa")
+			}
+
+			scancode = append(scancode, fmt.Sprintf("%02x", scancodeInt+0x80))
+			log.Printf("Sending char '%c', code '%v', shift %v", r, scancode, keyShift)
+		}
+
+		result = append(result, scancode...)
+	}
+
+	return result
+}

builder/hyperv/common/step_unmount_dvddrive.go

@@ -0,0 +1,53 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepUnmountDvdDrive struct {
+}
+
+func (s *StepUnmountDvdDrive) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	vmName := state.Get("vmName").(string)
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Unmount/delete os dvd drive...")
+
+	dvdControllerState := state.Get("os.dvd.properties")
+
+	if dvdControllerState == nil {
+		return multistep.ActionContinue
+	}
+
+	dvdController := dvdControllerState.(DvdControllerProperties)
+
+	if dvdController.Existing {
+		ui.Say(fmt.Sprintf("Unmounting os dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+		err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error unmounting os dvd drive: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	} else {
+		ui.Say(fmt.Sprintf("Delete os dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+		err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error deleting os dvd drive: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	state.Put("os.dvd.properties", nil)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepUnmountDvdDrive) Cleanup(state multistep.StateBag) {
+}

builder/hyperv/common/step_unmount_floppydrive.go

@@ -0,0 +1,38 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepUnmountFloppyDrive struct {
+	Generation uint
+}
+
+func (s *StepUnmountFloppyDrive) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+
+	if s.Generation > 1 {
+		return multistep.ActionContinue
+	}
+
+	vmName := state.Get("vmName").(string)
+	ui.Say("Unmount/delete floppy drive (Run)...")
+
+	errorMsg := "Error Unmounting floppy drive: %s"
+
+	err := driver.UnmountFloppyDrive(vmName)
+	if err != nil {
+		err := fmt.Errorf(errorMsg, err)
+		state.Put("error", err)
+		ui.Error(err.Error())
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepUnmountFloppyDrive) Cleanup(state multistep.StateBag) {
+	// do nothing
+}

builder/hyperv/common/step_unmount_guest_additions.go

@@ -0,0 +1,53 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepUnmountGuestAdditions struct {
+}
+
+func (s *StepUnmountGuestAdditions) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	vmName := state.Get("vmName").(string)
+	ui := state.Get("ui").(packer.Ui)
+
+	ui.Say("Unmount/delete Integration Services dvd drive...")
+
+	dvdControllerState := state.Get("guest.dvd.properties")
+
+	if dvdControllerState == nil {
+		return multistep.ActionContinue
+	}
+
+	dvdController := dvdControllerState.(DvdControllerProperties)
+
+	if dvdController.Existing {
+		ui.Say(fmt.Sprintf("Unmounting Integration Services dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+		err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error unmounting Integration Services dvd drive: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	} else {
+		ui.Say(fmt.Sprintf("Delete Integration Services dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+		err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+		if err != nil {
+			err := fmt.Errorf("Error deleting Integration Services dvd drive: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+	}
+
+	state.Put("guest.dvd.properties", nil)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepUnmountGuestAdditions) Cleanup(state multistep.StateBag) {
+}

builder/hyperv/common/step_unmount_secondary_dvd_images.go

@@ -0,0 +1,55 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+)
+
+type StepUnmountSecondaryDvdImages struct {
+}
+
+func (s *StepUnmountSecondaryDvdImages) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	ui.Say("Unmount/delete secondary dvd drives...")
+
+	dvdControllersState := state.Get("secondary.dvd.properties")
+
+	if dvdControllersState == nil {
+		return multistep.ActionContinue
+	}
+
+	dvdControllers := dvdControllersState.([]DvdControllerProperties)
+
+	for _, dvdController := range dvdControllers {
+		if dvdController.Existing {
+			ui.Say(fmt.Sprintf("Unmounting secondary dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+			err := driver.UnmountDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+			if err != nil {
+				err := fmt.Errorf("Error unmounting secondary dvd drive: %s", err)
+				state.Put("error", err)
+				ui.Error(err.Error())
+				return multistep.ActionHalt
+			}
+		} else {
+			ui.Say(fmt.Sprintf("Delete secondary dvd drives controller %d location %d ...", dvdController.ControllerNumber, dvdController.ControllerLocation))
+			err := driver.DeleteDvdDrive(vmName, dvdController.ControllerNumber, dvdController.ControllerLocation)
+			if err != nil {
+				err := fmt.Errorf("Error deleting secondary dvd drive: %s", err)
+				state.Put("error", err)
+				ui.Error(err.Error())
+				return multistep.ActionHalt
+			}
+		}
+	}
+
+	state.Put("secondary.dvd.properties", nil)
+
+	return multistep.ActionContinue
+}
+
+func (s *StepUnmountSecondaryDvdImages) Cleanup(state multistep.StateBag) {
+}

builder/hyperv/common/step_wait_for_install_to_complete.go

@@ -0,0 +1,90 @@
+package common
+
+import (
+	"fmt"
+	"github.com/mitchellh/multistep"
+	"github.com/mitchellh/packer/packer"
+	"time"
+)
+
+const (
+	SleepSeconds = 10
+)
+
+type StepWaitForPowerOff struct {
+}
+
+func (s *StepWaitForPowerOff) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+	ui.Say("Waiting for vm to be powered down...")
+
+	for {
+		isOff, err := driver.IsOff(vmName)
+
+		if err != nil {
+			err := fmt.Errorf("Error checking if vm is off: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		if isOff {
+			break
+		} else {
+			time.Sleep(time.Second * SleepSeconds)
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepWaitForPowerOff) Cleanup(state multistep.StateBag) {
+}
+
+type StepWaitForInstallToComplete struct {
+	ExpectedRebootCount uint
+	ActionName          string
+}
+
+func (s *StepWaitForInstallToComplete) Run(state multistep.StateBag) multistep.StepAction {
+	driver := state.Get("driver").(Driver)
+	ui := state.Get("ui").(packer.Ui)
+	vmName := state.Get("vmName").(string)
+
+	if len(s.ActionName) > 0 {
+		ui.Say(fmt.Sprintf("%v ! Waiting for VM to reboot %v times...", s.ActionName, s.ExpectedRebootCount))
+	}
+
+	var rebootCount uint
+	var lastUptime uint64
+
+	for rebootCount < s.ExpectedRebootCount {
+		uptime, err := driver.Uptime(vmName)
+
+		if err != nil {
+			err := fmt.Errorf("Error checking uptime: %s", err)
+			state.Put("error", err)
+			ui.Error(err.Error())
+			return multistep.ActionHalt
+		}
+
+		if uptime < lastUptime {
+			rebootCount++
+			ui.Say(fmt.Sprintf("%v  -> Detected reboot %v after %v seconds...", s.ActionName, rebootCount, lastUptime))
+		}
+
+		lastUptime = uptime
+
+		if rebootCount < s.ExpectedRebootCount {
+			time.Sleep(time.Second * SleepSeconds)
+		}
+	}
+
+	return multistep.ActionContinue
+}
+
+func (s *StepWaitForInstallToComplete) Cleanup(state multistep.StateBag) {
+
+}

builder/hyperv/iso/builder.go

@@ -0,0 +1,523 @@
+package iso
+
+import (
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/mitchellh/multistep"
+	hypervcommon "github.com/mitchellh/packer/builder/hyperv/common"
+	"github.com/mitchellh/packer/common"
+	"github.com/mitchellh/packer/helper/communicator"
+	"github.com/mitchellh/packer/helper/config"
+	"github.com/mitchellh/packer/packer"
+	powershell "github.com/mitchellh/packer/powershell"
+	"github.com/mitchellh/packer/powershell/hyperv"
+	"github.com/mitchellh/packer/template/interpolate"
+)
+
+const (
+	DefaultDiskSize = 40 * 1024        // ~40GB
+	MinDiskSize     = 256              // 256MB
+	MaxDiskSize     = 64 * 1024 * 1024 // 64TB
+
+	DefaultRamSize                 = 1 * 1024  // 1GB
+	MinRamSize                     = 32        // 32MB
+	MaxRamSize                     = 32 * 1024 // 32GB
+	MinNestedVirtualizationRamSize = 4 * 1024  // 4GB
+
+	LowRam = 256 // 256MB
+
+	DefaultUsername = ""
+	DefaultPassword = ""
+)
+
+// Builder implements packer.Builder and builds the actual Hyperv
+// images.
+type Builder struct {
+	config Config
+	runner multistep.Runner
+}
+
+type Config struct {
+	common.PackerConfig         `mapstructure:",squash"`
+	common.HTTPConfig           `mapstructure:",squash"`
+	common.ISOConfig            `mapstructure:",squash"`
+	hypervcommon.FloppyConfig   `mapstructure:",squash"`
+	hypervcommon.OutputConfig   `mapstructure:",squash"`
+	hypervcommon.SSHConfig      `mapstructure:",squash"`
+	hypervcommon.RunConfig      `mapstructure:",squash"`
+	hypervcommon.ShutdownConfig `mapstructure:",squash"`
+
+	// The size, in megabytes, of the hard disk to create for the VM.
+	// By default, this is 130048 (about 127 GB).
+	DiskSize uint `mapstructure:"disk_size"`
+	// The size, in megabytes, of the computer memory in the VM.
+	// By default, this is 1024 (about 1 GB).
+	RamSize uint `mapstructure:"ram_size"`
+	// A list of files to place onto a floppy disk that is attached when the
+	// VM is booted. This is most useful for unattended Windows installs,
+	// which look for an Autounattend.xml file on removable media. By default,
+	// no floppy will be attached. All files listed in this setting get
+	// placed into the root directory of the floppy and the floppy is attached
+	// as the first floppy device. Currently, no support exists for creating
+	// sub-directories on the floppy. Wildcard characters (*, ?, and [])
+	// are allowed. Directory names are also allowed, which will add all
+	// the files found in the directory to the floppy.
+	FloppyFiles []string `mapstructure:"floppy_files"`
+	//
+	SecondaryDvdImages []string `mapstructure:"secondary_iso_images"`
+
+	// Should integration services iso be mounted
+	GuestAdditionsMode string `mapstructure:"guest_additions_mode"`
+
+	// The path to the integration services iso
+	GuestAdditionsPath string `mapstructure:"guest_additions_path"`
+
+	// This is the name of the new virtual machine.
+	// By default this is "packer-BUILDNAME", where "BUILDNAME" is the name of the build.
+	VMName string `mapstructure:"vm_name"`
+
+	BootCommand                    []string `mapstructure:"boot_command"`
+	SwitchName                     string   `mapstructure:"switch_name"`
+	SwitchVlanId                   string   `mapstructure:"switch_vlan_id"`
+	VlanId                         string   `mapstructure:"vlan_id"`
+	Cpu                            uint     `mapstructure:"cpu"`
+	Generation                     uint     `mapstructure:"generation"`
+	EnableMacSpoofing              bool     `mapstructure:"enable_mac_spoofing"`
+	EnableDynamicMemory            bool     `mapstructure:"enable_dynamic_memory"`
+	EnableSecureBoot               bool     `mapstructure:"enable_secure_boot"`
+	EnableVirtualizationExtensions bool     `mapstructure:"enable_virtualization_extensions"`
+
+	Communicator string `mapstructure:"communicator"`
+
+	SkipCompaction bool `mapstructure:"skip_compaction"`
+
+	ctx interpolate.Context
+}
+
+// Prepare processes the build configuration parameters.
+func (b *Builder) Prepare(raws ...interface{}) ([]string, error) {
+	err := config.Decode(&b.config, &config.DecodeOpts{
+		Interpolate: true,
+		InterpolateFilter: &interpolate.RenderFilter{
+			Exclude: []string{
+				"boot_command",
+			},
+		},
+	}, raws...)
+	if err != nil {
+		return nil, err
+	}
+
+	// Accumulate any errors and warnings
+	var errs *packer.MultiError
+	warnings := make([]string, 0)
+
+	isoWarnings, isoErrs := b.config.ISOConfig.Prepare(&b.config.ctx)
+	warnings = append(warnings, isoWarnings...)
+	errs = packer.MultiErrorAppend(errs, isoErrs...)
+
+	errs = packer.MultiErrorAppend(errs, b.config.FloppyConfig.Prepare(&b.config.ctx)...)
+	errs = packer.MultiErrorAppend(errs, b.config.HTTPConfig.Prepare(&b.config.ctx)...)
+	errs = packer.MultiErrorAppend(errs, b.config.RunConfig.Prepare(&b.config.ctx)...)
+	errs = packer.MultiErrorAppend(errs, b.config.OutputConfig.Prepare(&b.config.ctx, &b.config.PackerConfig)...)
+	errs = packer.MultiErrorAppend(errs, b.config.SSHConfig.Prepare(&b.config.ctx)...)
+	errs = packer.MultiErrorAppend(errs, b.config.ShutdownConfig.Prepare(&b.config.ctx)...)
+
+	err = b.checkDiskSize()
+	if err != nil {
+		errs = packer.MultiErrorAppend(errs, err)
+	}
+
+	err = b.checkRamSize()
+	if err != nil {
+		errs = packer.MultiErrorAppend(errs, err)
+	}
+
+	if b.config.VMName == "" {
+		b.config.VMName = fmt.Sprintf("packer-%s", b.config.PackerBuildName)
+	}
+
+	log.Println(fmt.Sprintf("%s: %v", "VMName", b.config.VMName))
+
+	if b.config.SwitchName == "" {
+		b.config.SwitchName = b.detectSwitchName()
+	}
+
+	if b.config.Cpu < 1 {
+		b.config.Cpu = 1
+	}
+
+	if b.config.Generation != 2 {
+		b.config.Generation = 1
+	}
+
+	if b.config.Generation == 2 {
+		if len(b.config.FloppyFiles) > 0 {
+			err = errors.New("Generation 2 vms don't support floppy drives. Use ISO image instead.")
+			errs = packer.MultiErrorAppend(errs, err)
+		}
+	}
+
+	log.Println(fmt.Sprintf("Using switch %s", b.config.SwitchName))
+	log.Println(fmt.Sprintf("%s: %v", "SwitchName", b.config.SwitchName))
+
+	// Errors
+	if b.config.GuestAdditionsMode == "" {
+		if b.config.GuestAdditionsPath != "" {
+			b.config.GuestAdditionsMode = "attach"
+		} else {
+			b.config.GuestAdditionsPath = os.Getenv("WINDIR") + "\\system32\\vmguest.iso"
+
+			if _, err := os.Stat(b.config.GuestAdditionsPath); os.IsNotExist(err) {
+				if err != nil {
+					b.config.GuestAdditionsPath = ""
+					b.config.GuestAdditionsMode = "none"
+				} else {
+					b.config.GuestAdditionsMode = "attach"
+				}
+			}
+		}
+	}
+
+	if b.config.GuestAdditionsPath == "" && b.config.GuestAdditionsMode == "attach" {
+		b.config.GuestAdditionsPath = os.Getenv("WINDIR") + "\\system32\\vmguest.iso"
+
+		if _, err := os.Stat(b.config.GuestAdditionsPath); os.IsNotExist(err) {
+			if err != nil {
+				b.config.GuestAdditionsPath = ""
+			}
+		}
+	}
+
+	for _, isoPath := range b.config.SecondaryDvdImages {
+		if _, err := os.Stat(isoPath); os.IsNotExist(err) {
+			if err != nil {
+				errs = packer.MultiErrorAppend(
+					errs, fmt.Errorf("Secondary Dvd image does not exist: %s", err))
+			}
+		}
+	}
+
+	numberOfIsos := len(b.config.SecondaryDvdImages)
+
+	if b.config.GuestAdditionsMode == "attach" {
+		if _, err := os.Stat(b.config.GuestAdditionsPath); os.IsNotExist(err) {
+			if err != nil {
+				errs = packer.MultiErrorAppend(
+					errs, fmt.Errorf("Guest additions iso does not exist: %s", err))
+			}
+		}
+
+		numberOfIsos = numberOfIsos + 1
+	}
+
+	if b.config.Generation < 2 && numberOfIsos > 2 {
+		if b.config.GuestAdditionsMode == "attach" {
+			errs = packer.MultiErrorAppend(errs, fmt.Errorf("There are only 2 ide controllers available, so we can't support guest additions and these secondary dvds: %s", strings.Join(b.config.SecondaryDvdImages, ", ")))
+		} else {
+			errs = packer.MultiErrorAppend(errs, fmt.Errorf("There are only 2 ide controllers available, so we can't support these secondary dvds: %s", strings.Join(b.config.SecondaryDvdImages, ", ")))
+		}
+	} else if b.config.Generation > 1 && len(b.config.SecondaryDvdImages) > 16 {
+		if b.config.GuestAdditionsMode == "attach" {
+			errs = packer.MultiErrorAppend(errs, fmt.Errorf("There are not enough drive letters available for scsi (limited to 16), so we can't support guest additions and these secondary dvds: %s", strings.Join(b.config.SecondaryDvdImages, ", ")))
+		} else {
+			errs = packer.MultiErrorAppend(errs, fmt.Errorf("There are not enough drive letters available for scsi (limited to 16), so we can't support these secondary dvds: %s", strings.Join(b.config.SecondaryDvdImages, ", ")))
+		}
+	}
+
+	if b.config.EnableVirtualizationExtensions {
+		hasVirtualMachineVirtualizationExtensions, err := powershell.HasVirtualMachineVirtualizationExtensions()
+		if err != nil {
+			errs = packer.MultiErrorAppend(errs, fmt.Errorf("Failed detecting virtual machine virtualization extensions support: %s", err))
+		} else {
+			if !hasVirtualMachineVirtualizationExtensions {
+				errs = packer.MultiErrorAppend(errs, fmt.Errorf("This version of Hyper-V does not support virtual machine virtualization extension. Please use Windows 10 or Windows Server 2016 or newer."))
+			}
+		}
+	}
+
+	// Warnings
+
+	if b.config.ShutdownCommand == "" {
+		warnings = append(warnings,
+			"A shutdown_command was not specified. Without a shutdown command, Packer\n"+
+				"will forcibly halt the virtual machine, which may result in data loss.")
+	}
+
+	warning := b.checkHostAvailableMemory()
+	if warning != "" {
+		warnings = appendWarnings(warnings, warning)
+	}
+
+	if b.config.EnableVirtualizationExtensions {
+		if b.config.EnableDynamicMemory {
+			warning = fmt.Sprintf("For nested virtualization, when virtualization extension is enabled, dynamic memory should not be allowed.")
+			warnings = appendWarnings(warnings, warning)
+		}
+
+		if !b.config.EnableMacSpoofing {
+			warning = fmt.Sprintf("For nested virtualization, when virtualization extension is enabled, mac spoofing should be allowed.")
+			warnings = appendWarnings(warnings, warning)
+		}
+
+		if b.config.RamSize < MinNestedVirtualizationRamSize {
+			warning = fmt.Sprintf("For nested virtualization, when virtualization extension is enabled, there should be 4GB or more memory set for the vm, otherwise Hyper-V may fail to start any nested VMs.")
+			warnings = appendWarnings(warnings, warning)
+		}
+	}
+
+	if b.config.SwitchVlanId != "" {
+		if b.config.SwitchVlanId != b.config.VlanId {
+			warning = fmt.Sprintf("Switch network adaptor vlan should match virtual machine network adaptor vlan. The switch will not be able to see traffic from the VM.")
+			warnings = appendWarnings(warnings, warning)
+		}
+	}
+
+	if errs != nil && len(errs.Errors) > 0 {
+		return warnings, errs
+	}
+
+	return warnings, nil
+}
+
+// Run executes a Packer build and returns a packer.Artifact representing
+// a Hyperv appliance.
+func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
+	// Create the driver that we'll use to communicate with Hyperv
+	driver, err := hypervcommon.NewHypervPS4Driver()
+	if err != nil {
+		return nil, fmt.Errorf("Failed creating Hyper-V driver: %s", err)
+	}
+
+	// Set up the state.
+	state := new(multistep.BasicStateBag)
+	state.Put("cache", cache)
+	state.Put("config", &b.config)
+	state.Put("debug", b.config.PackerDebug)
+	state.Put("driver", driver)
+	state.Put("hook", hook)
+	state.Put("ui", ui)
+
+	steps := []multistep.Step{
+		&hypervcommon.StepCreateTempDir{},
+		&hypervcommon.StepOutputDir{
+			Force: b.config.PackerForce,
+			Path:  b.config.OutputDir,
+		},
+		&common.StepDownload{
+			Checksum:     b.config.ISOChecksum,
+			ChecksumType: b.config.ISOChecksumType,
+			Description:  "ISO",
+			ResultKey:    "iso_path",
+			Url:          b.config.ISOUrls,
+			Extension:    "iso",
+			TargetPath:   b.config.TargetPath,
+		},
+		&common.StepCreateFloppy{
+			Files: b.config.FloppyFiles,
+		},
+		&common.StepHTTPServer{
+			HTTPDir:     b.config.HTTPDir,
+			HTTPPortMin: b.config.HTTPPortMin,
+			HTTPPortMax: b.config.HTTPPortMax,
+		},
+		&hypervcommon.StepCreateSwitch{
+			SwitchName: b.config.SwitchName,
+		},
+		&hypervcommon.StepCreateVM{
+			VMName:                         b.config.VMName,
+			SwitchName:                     b.config.SwitchName,
+			RamSize:                        b.config.RamSize,
+			DiskSize:                       b.config.DiskSize,
+			Generation:                     b.config.Generation,
+			Cpu:                            b.config.Cpu,
+			EnableMacSpoofing:              b.config.EnableMacSpoofing,
+			EnableDynamicMemory:            b.config.EnableDynamicMemory,
+			EnableSecureBoot:               b.config.EnableSecureBoot,
+			EnableVirtualizationExtensions: b.config.EnableVirtualizationExtensions,
+		},
+		&hypervcommon.StepEnableIntegrationService{},
+
+		&hypervcommon.StepMountDvdDrive{
+			Generation: b.config.Generation,
+		},
+		&hypervcommon.StepMountFloppydrive{
+			Generation: b.config.Generation,
+		},
+
+		&hypervcommon.StepMountGuestAdditions{
+			GuestAdditionsMode: b.config.GuestAdditionsMode,
+			GuestAdditionsPath: b.config.GuestAdditionsPath,
+			Generation:         b.config.Generation,
+		},
+
+		&hypervcommon.StepMountSecondaryDvdImages{
+			IsoPaths:   b.config.SecondaryDvdImages,
+			Generation: b.config.Generation,
+		},
+
+		&hypervcommon.StepConfigureVlan{
+			VlanId:       b.config.VlanId,
+			SwitchVlanId: b.config.SwitchVlanId,
+		},
+
+		&hypervcommon.StepRun{
+			BootWait: b.config.BootWait,
+		},
+
+		&hypervcommon.StepTypeBootCommand{
+			BootCommand: b.config.BootCommand,
+			SwitchName:  b.config.SwitchName,
+			Ctx:         b.config.ctx,
+		},
+
+		// configure the communicator ssh, winrm
+		&communicator.StepConnect{
+			Config:    &b.config.SSHConfig.Comm,
+			Host:      hypervcommon.CommHost,
+			SSHConfig: hypervcommon.SSHConfigFunc(&b.config.SSHConfig),
+		},
+
+		// provision requires communicator to be setup
+		&common.StepProvision{},
+
+		&hypervcommon.StepShutdown{
+			Command: b.config.ShutdownCommand,
+			Timeout: b.config.ShutdownTimeout,
+		},
+
+		// wait for the vm to be powered off
+		&hypervcommon.StepWaitForPowerOff{},
+
+		// remove the secondary dvd images
+		// after we power down
+		&hypervcommon.StepUnmountSecondaryDvdImages{},
+		&hypervcommon.StepUnmountGuestAdditions{},
+		&hypervcommon.StepUnmountDvdDrive{},
+		&hypervcommon.StepUnmountFloppyDrive{
+			Generation: b.config.Generation,
+		},
+		&hypervcommon.StepExportVm{
+			OutputDir:      b.config.OutputDir,
+			SkipCompaction: b.config.SkipCompaction,
+		},
+
+		// the clean up actions for each step will be executed reverse order
+	}
+
+	// Run the steps.
+	if b.config.PackerDebug {
+		pauseFn := common.MultistepDebugFn(ui)
+		state.Put("pauseFn", pauseFn)
+		b.runner = &multistep.DebugRunner{
+			Steps:   steps,
+			PauseFn: pauseFn,
+		}
+	} else {
+		b.runner = &multistep.BasicRunner{Steps: steps}
+	}
+
+	b.runner.Run(state)
+
+	// Report any errors.
+	if rawErr, ok := state.GetOk("error"); ok {
+		return nil, rawErr.(error)
+	}
+
+	// If we were interrupted or cancelled, then just exit.
+	if _, ok := state.GetOk(multistep.StateCancelled); ok {
+		return nil, errors.New("Build was cancelled.")
+	}
+
+	if _, ok := state.GetOk(multistep.StateHalted); ok {
+		return nil, errors.New("Build was halted.")
+	}
+
+	return hypervcommon.NewArtifact(b.config.OutputDir)
+}
+
+// Cancel.
+func (b *Builder) Cancel() {
+	if b.runner != nil {
+		log.Println("Cancelling the step runner...")
+		b.runner.Cancel()
+	}
+}
+
+func appendWarnings(slice []string, data ...string) []string {
+	m := len(slice)
+	n := m + len(data)
+	if n > cap(slice) { // if necessary, reallocate
+		// allocate double what's needed, for future growth.
+		newSlice := make([]string, (n+1)*2)
+		copy(newSlice, slice)
+		slice = newSlice
+	}
+	slice = slice[0:n]
+	copy(slice[m:n], data)
+	return slice
+}
+
+func (b *Builder) checkDiskSize() error {
+	if b.config.DiskSize == 0 {
+		b.config.DiskSize = DefaultDiskSize
+	}
+
+	log.Println(fmt.Sprintf("%s: %v", "DiskSize", b.config.DiskSize))
+
+	if b.config.DiskSize < MinDiskSize {
+		return fmt.Errorf("disk_size: Virtual machine requires disk space >= %v GB, but defined: %v", MinDiskSize, b.config.DiskSize/1024)
+	} else if b.config.DiskSize > MaxDiskSize {
+		return fmt.Errorf("disk_size: Virtual machine requires disk space <= %v GB, but defined: %v", MaxDiskSize, b.config.DiskSize/1024)
+	}
+
+	return nil
+}
+
+func (b *Builder) checkRamSize() error {
+	if b.config.RamSize == 0 {
+		b.config.RamSize = DefaultRamSize
+	}
+
+	log.Println(fmt.Sprintf("%s: %v", "RamSize", b.config.RamSize))
+
+	if b.config.RamSize < MinRamSize {
+		return fmt.Errorf("ram_size: Virtual machine requires memory size >= %v MB, but defined: %v", MinRamSize, b.config.RamSize)
+	} else if b.config.RamSize > MaxRamSize {
+		return fmt.Errorf("ram_size: Virtual machine requires memory size <= %v MB, but defined: %v", MaxRamSize, b.config.RamSize)
+	}
+
+	return nil
+}
+
+func (b *Builder) checkHostAvailableMemory() string {
+	powershellAvailable, _, _ := powershell.IsPowershellAvailable()
+
+	if powershellAvailable {
+		freeMB := powershell.GetHostAvailableMemory()
+
+		if (freeMB - float64(b.config.RamSize)) < LowRam {
+			return fmt.Sprintf("Hyper-V might fail to create a VM if there is not enough free memory in the system.")
+		}
+	}
+
+	return ""
+}
+
+func (b *Builder) detectSwitchName() string {
+	powershellAvailable, _, _ := powershell.IsPowershellAvailable()
+
+	if powershellAvailable {
+		// no switch name, try to get one attached to a online network adapter
+		onlineSwitchName, err := hyperv.GetExternalOnlineVirtualSwitch()
+		if onlineSwitchName != "" && err == nil {
+			return onlineSwitchName
+		}
+	}
+
+	return fmt.Sprintf("packer-%s", b.config.PackerBuildName)
+}

builder/hyperv/iso/builder_test.go

@@ -0,0 +1,250 @@
+package iso
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/mitchellh/packer/packer"
+)
+
+func testConfig() map[string]interface{} {
+	return map[string]interface{}{
+		"iso_checksum":            "foo",
+		"iso_checksum_type":       "md5",
+		"iso_url":                 "http://www.packer.io",
+		"shutdown_command":        "yes",
+		"ssh_username":            "foo",
+		"ram_size":                64,
+		"disk_size":               256,
+		"guest_additions_mode":    "none",
+		packer.BuildNameConfigKey: "foo",
+	}
+}
+
+func TestBuilder_ImplementsBuilder(t *testing.T) {
+	var raw interface{}
+	raw = &Builder{}
+	if _, ok := raw.(packer.Builder); !ok {
+		t.Error("Builder must implement builder.")
+	}
+}
+
+func TestBuilderPrepare_Defaults(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.VMName != "packer-foo" {
+		t.Errorf("bad vm name: %s", b.config.VMName)
+	}
+}
+
+func TestBuilderPrepare_DiskSize(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	delete(config, "disk_size")
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("bad err: %s", err)
+	}
+
+	if b.config.DiskSize != 40*1024 {
+		t.Fatalf("bad size: %d", b.config.DiskSize)
+	}
+
+	config["disk_size"] = 256
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.DiskSize != 256 {
+		t.Fatalf("bad size: %d", b.config.DiskSize)
+	}
+}
+
+func TestBuilderPrepare_InvalidKey(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Add a random key
+	config["i_should_not_be_valid"] = true
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+}
+
+func TestBuilderPrepare_ISOChecksum(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Test bad
+	config["iso_checksum"] = ""
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test good
+	config["iso_checksum"] = "FOo"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOChecksum != "foo" {
+		t.Fatalf("should've lowercased: %s", b.config.ISOChecksum)
+	}
+}
+
+func TestBuilderPrepare_ISOChecksumType(t *testing.T) {
+	var b Builder
+	config := testConfig()
+
+	// Test bad
+	config["iso_checksum_type"] = ""
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test good
+	config["iso_checksum_type"] = "mD5"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOChecksumType != "md5" {
+		t.Fatalf("should've lowercased: %s", b.config.ISOChecksumType)
+	}
+
+	// Test unknown
+	config["iso_checksum_type"] = "fake"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test none
+	config["iso_checksum_type"] = "none"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) == 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if b.config.ISOChecksumType != "none" {
+		t.Fatalf("should've lowercased: %s", b.config.ISOChecksumType)
+	}
+}
+
+func TestBuilderPrepare_ISOUrl(t *testing.T) {
+	var b Builder
+	config := testConfig()
+	delete(config, "iso_url")
+	delete(config, "iso_urls")
+
+	// Test both epty
+	config["iso_url"] = ""
+	b = Builder{}
+	warns, err := b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test iso_url set
+	config["iso_url"] = "http://www.packer.io"
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Errorf("should not have error: %s", err)
+	}
+
+	expected := []string{"http://www.packer.io"}
+	if !reflect.DeepEqual(b.config.ISOUrls, expected) {
+		t.Fatalf("bad: %#v", b.config.ISOUrls)
+	}
+
+	// Test both set
+	config["iso_url"] = "http://www.packer.io"
+	config["iso_urls"] = []string{"http://www.packer.io"}
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err == nil {
+		t.Fatal("should have error")
+	}
+
+	// Test just iso_urls set
+	delete(config, "iso_url")
+	config["iso_urls"] = []string{
+		"http://www.packer.io",
+		"http://www.hashicorp.com",
+	}
+
+	b = Builder{}
+	warns, err = b.Prepare(config)
+	if len(warns) > 0 {
+		t.Fatalf("bad: %#v", warns)
+	}
+	if err != nil {
+		t.Errorf("should not have error: %s", err)
+	}
+
+	expected = []string{
+		"http://www.packer.io",
+		"http://www.hashicorp.com",
+	}
+	if !reflect.DeepEqual(b.config.ISOUrls, expected) {
+		t.Fatalf("bad: %#v", b.config.ISOUrls)
+	}
+}

command/plugin.go

@@ -23,6 +23,7 @@ import (
 	dockerbuilder "github.com/mitchellh/packer/builder/docker"
 	filebuilder "github.com/mitchellh/packer/builder/file"
 	googlecomputebuilder "github.com/mitchellh/packer/builder/googlecompute"
+	hypervbuilder "github.com/mitchellh/packer/builder/hyperv/iso"
 	nullbuilder "github.com/mitchellh/packer/builder/null"
 	oneandonebuilder "github.com/mitchellh/packer/builder/oneandone"
 	openstackbuilder "github.com/mitchellh/packer/builder/openstack"
@@ -34,6 +35,7 @@ import (
 	virtualboxovfbuilder "github.com/mitchellh/packer/builder/virtualbox/ovf"
 	vmwareisobuilder "github.com/mitchellh/packer/builder/vmware/iso"
 	vmwarevmxbuilder "github.com/mitchellh/packer/builder/vmware/vmx"
+
 	amazonimportpostprocessor "github.com/mitchellh/packer/post-processor/amazon-import"
 	artificepostprocessor "github.com/mitchellh/packer/post-processor/artifice"
 	atlaspostprocessor "github.com/mitchellh/packer/post-processor/atlas"
@@ -49,6 +51,7 @@ import (
 	vagrantpostprocessor "github.com/mitchellh/packer/post-processor/vagrant"
 	vagrantcloudpostprocessor "github.com/mitchellh/packer/post-processor/vagrant-cloud"
 	vspherepostprocessor "github.com/mitchellh/packer/post-processor/vsphere"
+
 	ansibleprovisioner "github.com/mitchellh/packer/provisioner/ansible"
 	ansiblelocalprovisioner "github.com/mitchellh/packer/provisioner/ansible-local"
 	chefclientprovisioner "github.com/mitchellh/packer/provisioner/chef-client"
@@ -79,6 +82,7 @@ var Builders = map[string]packer.Builder{
 	"docker":           new(dockerbuilder.Builder),
 	"file":             new(filebuilder.Builder),
 	"googlecompute":    new(googlecomputebuilder.Builder),
+	"hyperv-iso":       new(hypervbuilder.Builder),
 	"null":             new(nullbuilder.Builder),
 	"oneandone":        new(oneandonebuilder.Builder),
 	"openstack":        new(openstackbuilder.Builder),

common/config_test.go

@@ -120,7 +120,7 @@ func TestDownloadableURL_FilePaths(t *testing.T) {
 	}()
 
 	// Test some cases with and without a schema prefix
-	for _, prefix := range []string{"", "file://"} {
+	for _, prefix := range []string{"", filePrefix} {
 		// Nonexistent file
 		_, err = DownloadableURL(prefix + "i/dont/exist")
 		if err != nil {

common/download_test.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"os"
+	"runtime"
 	"testing"
 )
 
@@ -56,6 +57,7 @@ func TestDownloadClient_basic(t *testing.T) {
 		Url:        ts.URL + "/basic.txt",
 		TargetPath: tf.Name(),
 	})
+
 	path, err := client.Get()
 	if err != nil {
 		t.Fatalf("err: %s", err)
@@ -352,7 +354,13 @@ func TestDownloadFileUrl(t *testing.T) {
 
 	// source_path is a file path and source is a network path
 	sourcePath := fmt.Sprintf("%s/test-fixtures/fileurl/%s", cwd, "cake")
-	source := fmt.Sprintf("file://" + sourcePath)
+
+	filePrefix := "file://"
+	if runtime.GOOS == "windows" {
+		filePrefix += "/"
+	}
+
+	source := fmt.Sprintf(filePrefix + sourcePath)
 	t.Logf("Trying to download %s", source)
 
 	config := &DownloadConfig{

common/iso_config.go

@@ -8,6 +8,7 @@ import (
 	"net/url"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 
 	"github.com/mitchellh/packer/template/interpolate"
@@ -77,7 +78,13 @@ func (c *ISOConfig) Prepare(ctx *interpolate.Context) (warnings []string, errs [
 							return warnings, errs
 						}
 					case "file":
-						file, err := os.Open(u.Path)
+						path := u.Path
+
+						if runtime.GOOS == "windows" && len(path) > 2 && path[0] == '/' && path[2] == ':' {
+							path = strings.TrimLeft(path, "/")
+						}
+
+						file, err := os.Open(path)
 						if err != nil {
 							errs = append(errs, err)
 							return warnings, errs

common/iso_config_test.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"net/http/httptest"
 	"reflect"
+	"runtime"
 	"testing"
 )
 
@@ -80,7 +81,11 @@ func TestISOConfigPrepare_ISOChecksumURL(t *testing.T) {
 	i.ISOChecksum = ""
 	cs_file, _ := ioutil.TempFile("", "packer-test-")
 	ioutil.WriteFile(cs_file.Name(), []byte(cs_bsd_style), 0666)
-	i.ISOChecksumURL = fmt.Sprintf("file://%s", cs_file.Name())
+	filePrefix := "file://"
+	if runtime.GOOS == "windows" {
+		filePrefix += "/"
+	}
+	i.ISOChecksumURL = fmt.Sprintf("%s%s", filePrefix, cs_file.Name())
 	warns, err = i.Prepare(nil)
 	if len(warns) > 0 {
 		t.Fatalf("bad: %#v", warns)
@@ -98,7 +103,7 @@ func TestISOConfigPrepare_ISOChecksumURL(t *testing.T) {
 	i.ISOChecksum = ""
 	cs_file, _ = ioutil.TempFile("", "packer-test-")
 	ioutil.WriteFile(cs_file.Name(), []byte(cs_gnu_style), 0666)
-	i.ISOChecksumURL = fmt.Sprintf("file://%s", cs_file.Name())
+	i.ISOChecksumURL = fmt.Sprintf("%s%s", filePrefix, cs_file.Name())
 	warns, err = i.Prepare(nil)
 	if len(warns) > 0 {
 		t.Fatalf("bad: %#v", warns)

helper/communicator/step_connect.go

@@ -33,6 +33,7 @@ type StepConnect struct {
 	// WinRMConfig should return the default configuration for
 	// connecting via WinRM.
 	WinRMConfig func(multistep.StateBag) (*WinRMConfig, error)
+	WinRMPort   func(multistep.StateBag) (int, error)
 
 	// CustomConnect can be set to have custom connectors for specific
 	// types. These take highest precedence so you can also override
@@ -55,7 +56,7 @@ func (s *StepConnect) Run(state multistep.StateBag) multistep.StepAction {
 			Config:      s.Config,
 			Host:        s.Host,
 			WinRMConfig: s.WinRMConfig,
-			WinRMPort:   s.SSHPort,
+			WinRMPort:   s.WinRMPort,
 		},
 	}
 	for k, v := range s.CustomConnect {

helper/communicator/step_connect_winrm.go

@@ -96,6 +96,7 @@ func (s *StepConnectWinRM) waitForWinRM(state multistep.StateBag, cancel <-chan
 			log.Printf("[DEBUG] Error getting WinRM host: %s", err)
 			continue
 		}
+
 		port := s.Config.WinRMPort
 		if s.WinRMPort != nil {
 			port, err = s.WinRMPort(state)

post-processor/vagrant/hyperv.go

@@ -3,7 +3,9 @@ package vagrant
 import (
 	"fmt"
 	"github.com/mitchellh/packer/packer"
+	"os"
 	"path/filepath"
+	"strings"
 )
 
 type HypervProvider struct{}
@@ -16,15 +18,49 @@ func (p *HypervProvider) Process(ui packer.Ui, artifact packer.Artifact, dir str
 	// Create the metadata
 	metadata = map[string]interface{}{"provider": "hyperv"}
 
+	// ui.Message(fmt.Sprintf("artifacts all: %+v", artifact))
+	var outputDir string
+
+	// Vargant requires specific dir structure for hyperv
+	// hyperv builder creates the structure in the output dir
+	// we have to keep the structure in a temp dir
+	// hack little bit but string in artifact usually have output dir
+	artifactString := artifact.String()
+	d := strings.Split(artifactString, ": ")
+	outputDir = d[1]
+	// ui.Message(fmt.Sprintf("artifact dir from string: %s", outputDir))
+
 	// Copy all of the original contents into the temporary directory
 	for _, path := range artifact.Files() {
 		ui.Message(fmt.Sprintf("Copying: %s", path))
 
-		dstPath := filepath.Join(dir, filepath.Base(path))
-		if err = CopyContents(dstPath, path); err != nil {
+		var rel string
+
+		rel, err = filepath.Rel(outputDir, filepath.Dir(path))
+		// ui.Message(fmt.Sprintf("rel is: %s", rel))
+
+		if err != nil {
+			ui.Message(fmt.Sprintf("err in: %s", rel))
+			return
+		}
+
+		dstDir := filepath.Join(dir, rel)
+		// ui.Message(fmt.Sprintf("dstdir is: %s", dstDir))
+		if _, err = os.Stat(dstDir); err != nil {
+			if err = os.MkdirAll(dstDir, 0755); err != nil {
+				ui.Message(fmt.Sprintf("err in creating: %s", dstDir))
 				return
 			}
 		}
 
+		dstPath := filepath.Join(dstDir, filepath.Base(path))
+
+		if err = CopyContents(dstPath, path); err != nil {
+			ui.Message(fmt.Sprintf("err in copying: %s to %s", path, dstPath))
+			return
+		}
+		ui.Message(fmt.Sprintf("Copyed %s to %s", path, dstPath))
+	}
+
 	return
 }

powershell/hyperv/hyperv.go

@@ -0,0 +1,984 @@
+package hyperv
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+
+	"github.com/mitchellh/packer/powershell"
+)
+
+func GetHostAdapterIpAddressForSwitch(switchName string) (string, error) {
+	var script = `
+param([string]$switchName, [int]$addressIndex)
+
+$HostVMAdapter = Get-VMNetworkAdapter -ManagementOS -SwitchName $switchName
+if ($HostVMAdapter){
+    $HostNetAdapter = Get-NetAdapter | ?{ $_.DeviceID -eq $HostVMAdapter.DeviceId }
+    if ($HostNetAdapter){
+        $HostNetAdapterConfiguration =  @(get-wmiobject win32_networkadapterconfiguration -filter "IPEnabled = 'TRUE' AND InterfaceIndex=$($HostNetAdapter.ifIndex)")
+        if ($HostNetAdapterConfiguration){
+            return @($HostNetAdapterConfiguration.IpAddress)[$addressIndex]
+        }
+    }
+}
+return $false
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, switchName, "0")
+
+	return cmdOut, err
+}
+
+func GetVirtualMachineNetworkAdapterAddress(vmName string) (string, error) {
+
+	var script = `
+param([string]$vmName, [int]$addressIndex)
+try {
+  $adapter = Get-VMNetworkAdapter -VMName $vmName -ErrorAction SilentlyContinue
+  $ip = $adapter.IPAddresses[$addressIndex]
+  if($ip -eq $null) {
+    return $false
+  }
+} catch {
+  return $false
+}
+$ip
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName, "0")
+
+	return cmdOut, err
+}
+
+func CreateDvdDrive(vmName string, isoPath string, generation uint) (uint, uint, error) {
+	var ps powershell.PowerShellCmd
+	var script string
+
+	script = `
+param([string]$vmName, [string]$isoPath)
+$dvdController = Add-VMDvdDrive -VMName $vmName -path $isoPath -Passthru
+$dvdController | Set-VMDvdDrive -path $null
+$result = "$($dvdController.ControllerNumber),$($dvdController.ControllerLocation)"
+$result
+`
+
+	cmdOut, err := ps.Output(script, vmName, isoPath)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	cmdOutArray := strings.Split(cmdOut, ",")
+	if len(cmdOutArray) != 2 {
+		return 0, 0, errors.New("Did not return controller number and controller location")
+	}
+
+	controllerNumberTemp, err := strconv.ParseUint(strings.TrimSpace(cmdOutArray[0]), 10, 64)
+	if err != nil {
+		return 0, 0, err
+	}
+	controllerNumber := uint(controllerNumberTemp)
+
+	controllerLocationTemp, err := strconv.ParseUint(strings.TrimSpace(cmdOutArray[1]), 10, 64)
+	if err != nil {
+		return controllerNumber, 0, err
+	}
+	controllerLocation := uint(controllerLocationTemp)
+
+	return controllerNumber, controllerLocation, err
+}
+
+func MountDvdDrive(vmName string, path string, controllerNumber uint, controllerLocation uint) error {
+
+	var script = `
+param([string]$vmName,[string]$path,[string]$controllerNumber,[string]$controllerLocation)
+$vmDvdDrive = Get-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation
+if (!$vmDvdDrive) {throw 'unable to find dvd drive'}
+Set-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation -Path $path
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, path, strconv.FormatInt(int64(controllerNumber), 10), strconv.FormatInt(int64(controllerLocation), 10))
+	return err
+}
+
+func UnmountDvdDrive(vmName string, controllerNumber uint, controllerLocation uint) error {
+	var script = `
+param([string]$vmName,[int]$controllerNumber,[int]$controllerLocation)
+$vmDvdDrive = Get-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation
+if (!$vmDvdDrive) {throw 'unable to find dvd drive'}
+Set-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation -Path $null
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, strconv.FormatInt(int64(controllerNumber), 10), strconv.FormatInt(int64(controllerLocation), 10))
+	return err
+}
+
+func SetBootDvdDrive(vmName string, controllerNumber uint, controllerLocation uint, generation uint) error {
+
+	if generation < 2 {
+		script := `
+param([string]$vmName)
+Set-VMBios -VMName $vmName -StartupOrder @("CD", "IDE","LegacyNetworkAdapter","Floppy")
+`
+		var ps powershell.PowerShellCmd
+		err := ps.Run(script, vmName)
+		return err
+	} else {
+		script := `
+param([string]$vmName,[int]$controllerNumber,[int]$controllerLocation)
+$vmDvdDrive = Get-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation
+if (!$vmDvdDrive) {throw 'unable to find dvd drive'}
+Set-VMFirmware -VMName $vmName -FirstBootDevice $vmDvdDrive -ErrorAction SilentlyContinue
+`
+		var ps powershell.PowerShellCmd
+		err := ps.Run(script, vmName, strconv.FormatInt(int64(controllerNumber), 10), strconv.FormatInt(int64(controllerLocation), 10))
+		return err
+	}
+}
+
+func DeleteDvdDrive(vmName string, controllerNumber uint, controllerLocation uint) error {
+	var script = `
+param([string]$vmName,[int]$controllerNumber,[int]$controllerLocation)
+$vmDvdDrive = Get-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation
+if (!$vmDvdDrive) {throw 'unable to find dvd drive'}
+Remove-VMDvdDrive -VMName $vmName -ControllerNumber $controllerNumber -ControllerLocation $controllerLocation
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, strconv.FormatInt(int64(controllerNumber), 10), strconv.FormatInt(int64(controllerLocation), 10))
+	return err
+}
+
+func DeleteAllDvdDrives(vmName string) error {
+	var script = `
+param([string]$vmName)
+Get-VMDvdDrive -VMName $vmName | Remove-VMDvdDrive
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func MountFloppyDrive(vmName string, path string) error {
+	var script = `
+param([string]$vmName, [string]$path)
+Set-VMFloppyDiskDrive -VMName $vmName -Path $path
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, path)
+	return err
+}
+
+func UnmountFloppyDrive(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+Set-VMFloppyDiskDrive -VMName $vmName -Path $null
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func CreateVirtualMachine(vmName string, path string, ram int64, diskSize int64, switchName string, generation uint) error {
+
+	if generation == 2 {
+		var script = `
+param([string]$vmName, [string]$path, [long]$memoryStartupBytes, [long]$newVHDSizeBytes, [string]$switchName, [int]$generation)
+$vhdx = $vmName + '.vhdx'
+$vhdPath = Join-Path -Path $path -ChildPath $vhdx
+New-VM -Name $vmName -Path $path -MemoryStartupBytes $memoryStartupBytes -NewVHDPath $vhdPath -NewVHDSizeBytes $newVHDSizeBytes -SwitchName $switchName -Generation $generation
+`
+		var ps powershell.PowerShellCmd
+		err := ps.Run(script, vmName, path, strconv.FormatInt(ram, 10), strconv.FormatInt(diskSize, 10), switchName, strconv.FormatInt(int64(generation), 10))
+		return err
+	} else {
+		var script = `
+param([string]$vmName, [string]$path, [long]$memoryStartupBytes, [long]$newVHDSizeBytes, [string]$switchName)
+$vhdx = $vmName + '.vhdx'
+$vhdPath = Join-Path -Path $path -ChildPath $vhdx
+New-VM -Name $vmName -Path $path -MemoryStartupBytes $memoryStartupBytes -NewVHDPath $vhdPath -NewVHDSizeBytes $newVHDSizeBytes -SwitchName $switchName
+`
+		var ps powershell.PowerShellCmd
+		err := ps.Run(script, vmName, path, strconv.FormatInt(ram, 10), strconv.FormatInt(diskSize, 10), switchName)
+
+		if err != nil {
+			return err
+		}
+
+		return DeleteAllDvdDrives(vmName)
+	}
+}
+
+func SetVirtualMachineCpuCount(vmName string, cpu uint) error {
+
+	var script = `
+param([string]$vmName, [int]$cpu)
+Set-VMProcessor -VMName $vmName -Count $cpu
+`
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, strconv.FormatInt(int64(cpu), 10))
+	return err
+}
+
+func SetVirtualMachineVirtualizationExtensions(vmName string, enableVirtualizationExtensions bool) error {
+
+	var script = `
+param([string]$vmName, [string]$exposeVirtualizationExtensionsString)
+$exposeVirtualizationExtensions = [System.Boolean]::Parse($exposeVirtualizationExtensionsString)
+Set-VMProcessor -VMName $vmName -ExposeVirtualizationExtensions $exposeVirtualizationExtensions
+`
+	exposeVirtualizationExtensionsString := "False"
+	if enableVirtualizationExtensions {
+		exposeVirtualizationExtensionsString = "True"
+	}
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, exposeVirtualizationExtensionsString)
+	return err
+}
+
+func SetVirtualMachineDynamicMemory(vmName string, enableDynamicMemory bool) error {
+
+	var script = `
+param([string]$vmName, [string]$enableDynamicMemoryString)
+$enableDynamicMemory = [System.Boolean]::Parse($enableDynamicMemoryString)
+Set-VMMemory -VMName $vmName -DynamicMemoryEnabled $enableDynamicMemory
+`
+	enableDynamicMemoryString := "False"
+	if enableDynamicMemory {
+		enableDynamicMemoryString = "True"
+	}
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, enableDynamicMemoryString)
+	return err
+}
+
+func SetVirtualMachineMacSpoofing(vmName string, enableMacSpoofing bool) error {
+	var script = `
+param([string]$vmName, $enableMacSpoofing)
+Set-VMNetworkAdapter -VMName $vmName -MacAddressSpoofing $enableMacSpoofing
+`
+
+	var ps powershell.PowerShellCmd
+
+	enableMacSpoofingString := "Off"
+	if enableMacSpoofing {
+		enableMacSpoofingString = "On"
+	}
+
+	err := ps.Run(script, vmName, enableMacSpoofingString)
+	return err
+}
+
+func SetVirtualMachineSecureBoot(vmName string, enableSecureBoot bool) error {
+	var script = `
+param([string]$vmName, $enableSecureBoot)
+Set-VMFirmware -VMName $vmName -EnableSecureBoot $enableSecureBoot
+`
+
+	var ps powershell.PowerShellCmd
+
+	enableSecureBootString := "Off"
+	if enableSecureBoot {
+		enableSecureBootString = "On"
+	}
+
+	err := ps.Run(script, vmName, enableSecureBootString)
+	return err
+}
+
+func DeleteVirtualMachine(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+
+$vm = Get-VM -Name $vmName
+if (($vm.State -ne [Microsoft.HyperV.PowerShell.VMState]::Off) -and ($vm.State -ne [Microsoft.HyperV.PowerShell.VMState]::OffCritical)) {
+    Stop-VM -VM $vm -TurnOff -Force -Confirm:$false
+}
+
+Remove-VM -Name $vmName -Force -Confirm:$false
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func ExportVirtualMachine(vmName string, path string) error {
+
+	var script = `
+param([string]$vmName, [string]$path)
+Export-VM -Name $vmName -Path $path
+
+if (Test-Path -Path ([IO.Path]::Combine($path, $vmName, 'Virtual Machines', '*.VMCX')))
+{
+  $vm = Get-VM -Name $vmName
+  $vm_adapter = Get-VMNetworkAdapter -VM $vm | Select -First 1
+
+  $config = [xml]@"
+<?xml version="1.0" ?>
+<configuration>
+  <properties>
+    <subtype type="integer">$($vm.Generation - 1)</subtype>
+    <name type="string">$($vm.Name)</name>
+  </properties>
+  <settings>
+    <processors>
+      <count type="integer">$($vm.ProcessorCount)</count>
+    </processors>
+    <memory>
+      <bank>
+        <dynamic_memory_enabled type="bool">$($vm.DynamicMemoryEnabled)</dynamic_memory_enabled>
+        <limit type="integer">$($vm.MemoryMaximum / 1MB)</limit>
+        <reservation type="integer">$($vm.MemoryMinimum / 1MB)</reservation>
+        <size type="integer">$($vm.MemoryStartup / 1MB)</size>
+      </bank>
+    </memory>
+  </settings>
+  <AltSwitchName type="string">$($vm_adapter.SwitchName)</AltSwitchName>
+  <boot>
+    <device0 type="string">Optical</device0>
+  </boot>
+  <secure_boot_enabled type="bool">False</secure_boot_enabled>
+  <notes type="string">$($vm.Notes)</notes>
+  <vm-controllers/>
+</configuration>
+"@
+
+  if ($vm.Generation -eq 1)
+  {
+    $vm_controllers  = Get-VMIdeController -VM $vm
+    $controller_type = $config.SelectSingleNode('/configuration/vm-controllers')
+    # IDE controllers are not stored in a special XML container
+  }
+  else
+  {
+    $vm_controllers  = Get-VMScsiController -VM $vm
+    $controller_type = $config.CreateElement('scsi')
+    $controller_type.SetAttribute('ChannelInstanceGuid', 'x')
+    # SCSI controllers are stored in the scsi XML container
+    if ((Get-VMFirmware -VM $vm).SecureBoot -eq [Microsoft.HyperV.PowerShell.OnOffState]::On)
+    {
+      $config.configuration.secure_boot_enabled.'#text' = 'True'
+    }
+    else
+    {
+      $config.configuration.secure_boot_enabled.'#text' = 'False'
+    }
+  }
+
+  $vm_controllers | ForEach {
+    $controller = $config.CreateElement('controller' + $_.ControllerNumber)
+    $_.Drives | ForEach {
+      $drive = $config.CreateElement('drive' + ($_.DiskNumber + 0))
+      $drive_path = $config.CreateElement('pathname')
+      $drive_path.SetAttribute('type', 'string')
+      $drive_path.AppendChild($config.CreateTextNode($_.Path))
+      $drive_type = $config.CreateElement('type')
+      $drive_type.SetAttribute('type', 'string')
+      if ($_ -is [Microsoft.HyperV.PowerShell.HardDiskDrive])
+      {
+        $drive_type.AppendChild($config.CreateTextNode('VHD'))
+      }
+      elseif ($_ -is [Microsoft.HyperV.PowerShell.DvdDrive])
+      {
+        $drive_type.AppendChild($config.CreateTextNode('ISO'))
+      }
+      else
+      {
+        $drive_type.AppendChild($config.CreateTextNode('NONE'))
+      }
+      $drive.AppendChild($drive_path)
+      $drive.AppendChild($drive_type)
+      $controller.AppendChild($drive)
+    }
+    $controller_type.AppendChild($controller)
+  }
+  if ($controller_type.Name -ne 'vm-controllers')
+  {
+    $config.SelectSingleNode('/configuration/vm-controllers').AppendChild($controller_type)
+  }
+
+  $config.Save([IO.Path]::Combine($path, $vm.Name, 'Virtual Machines', 'box.xml'))
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, path)
+	return err
+}
+
+func CompactDisks(expPath string, vhdDir string) error {
+	var script = `
+param([string]$srcPath, [string]$vhdDirName)
+Get-ChildItem "$srcPath/$vhdDirName" -Filter *.vhd* | %{
+    Optimize-VHD -Path $_.FullName -Mode Full
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, expPath, vhdDir)
+	return err
+}
+
+func CopyExportedVirtualMachine(expPath string, outputPath string, vhdDir string, vmDir string) error {
+
+	var script = `
+param([string]$srcPath, [string]$dstPath, [string]$vhdDirName, [string]$vmDir)
+Move-Item -Path $srcPath/*.* -Destination $dstPath
+Move-Item -Path $srcPath/$vhdDirName -Destination $dstPath
+Move-Item -Path $srcPath/$vmDir -Destination $dstPath
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, expPath, outputPath, vhdDir, vmDir)
+	return err
+}
+
+func CreateVirtualSwitch(switchName string, switchType string) (bool, error) {
+
+	var script = `
+param([string]$switchName,[string]$switchType)
+$switches = Get-VMSwitch -Name $switchName -ErrorAction SilentlyContinue
+if ($switches.Count -eq 0) {
+  New-VMSwitch -Name $switchName -SwitchType $switchType
+  return $true
+}
+return $false
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, switchName, switchType)
+	var created = strings.TrimSpace(cmdOut) == "True"
+	return created, err
+}
+
+func DeleteVirtualSwitch(switchName string) error {
+
+	var script = `
+param([string]$switchName)
+$switch = Get-VMSwitch -Name $switchName -ErrorAction SilentlyContinue
+if ($switch -ne $null) {
+    $switch | Remove-VMSwitch -Force -Confirm:$false
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, switchName)
+	return err
+}
+
+func StartVirtualMachine(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+if ($vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Off) {
+  Start-VM -Name $vmName -Confirm:$false
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func RestartVirtualMachine(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+Restart-VM $vmName -Force -Confirm:$false
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func StopVirtualMachine(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName
+if ($vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Running) {
+    Stop-VM -VM $vm -Force -Confirm:$false
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func EnableVirtualMachineIntegrationService(vmName string, integrationServiceName string) error {
+
+	integrationServiceId := ""
+	switch integrationServiceName {
+	case "Time Synchronization":
+		integrationServiceId = "2497F4DE-E9FA-4204-80E4-4B75C46419C0"
+	case "Heartbeat":
+		integrationServiceId = "84EAAE65-2F2E-45F5-9BB5-0E857DC8EB47"
+	case "Key-Value Pair Exchange":
+		integrationServiceId = "2A34B1C2-FD73-4043-8A5B-DD2159BC743F"
+	case "Shutdown":
+		integrationServiceId = "9F8233AC-BE49-4C79-8EE3-E7E1985B2077"
+	case "VSS":
+		integrationServiceId = "5CED1297-4598-4915-A5FC-AD21BB4D02A4"
+	case "Guest Service Interface":
+		integrationServiceId = "6C09BB55-D683-4DA0-8931-C9BF705F6480"
+	default:
+		panic("unrecognized Integration Service Name")
+	}
+
+	var script = `
+param([string]$vmName,[string]$integrationServiceId)
+Get-VMIntegrationService -VmName $vmName | ?{$_.Id -match $integrationServiceId} | Enable-VMIntegrationService
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, integrationServiceId)
+	return err
+}
+
+func SetNetworkAdapterVlanId(switchName string, vlanId string) error {
+
+	var script = `
+param([string]$networkAdapterName,[string]$vlanId)
+Set-VMNetworkAdapterVlan -ManagementOS -VMNetworkAdapterName $networkAdapterName -Access -VlanId $vlanId
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, switchName, vlanId)
+	return err
+}
+
+func SetVirtualMachineVlanId(vmName string, vlanId string) error {
+
+	var script = `
+param([string]$vmName,[string]$vlanId)
+Set-VMNetworkAdapterVlan -VMName $vmName -Access -VlanId $vlanId
+`
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, vlanId)
+	return err
+}
+
+func GetExternalOnlineVirtualSwitch() (string, error) {
+
+	var script = `
+$adapters = Get-NetAdapter -Physical -ErrorAction SilentlyContinue | Where-Object { $_.Status -eq 'Up' } | Sort-Object -Descending -Property Speed
+foreach ($adapter in $adapters) { 
+  $switch = Get-VMSwitch -SwitchType External | Where-Object { $_.NetAdapterInterfaceDescription -eq $adapter.InterfaceDescription }
+
+  if ($switch -ne $null) {
+    $switch.Name
+    break
+  }
+}
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script)
+	if err != nil {
+		return "", err
+	}
+
+	var switchName = strings.TrimSpace(cmdOut)
+	return switchName, nil
+}
+
+func CreateExternalVirtualSwitch(vmName string, switchName string) error {
+
+	var script = `
+param([string]$vmName,[string]$switchName)
+$switch = $null
+$names = @('ethernet','wi-fi','lan')
+$adapters = foreach ($name in $names) {
+  Get-NetAdapter -Physical -Name $name -ErrorAction SilentlyContinue | where status -eq 'up'
+}
+
+foreach ($adapter in $adapters) { 
+  $switch = Get-VMSwitch -SwitchType External | where { $_.NetAdapterInterfaceDescription -eq $adapter.InterfaceDescription }
+
+  if ($switch -eq $null) { 
+    $switch = New-VMSwitch -Name $switchName -NetAdapterName $adapter.Name -AllowManagementOS $true -Notes 'Parent OS, VMs, WiFi'
+  }
+
+  if ($switch -ne $null) {
+    break
+  }
+}
+
+if($switch -ne $null) { 
+  Get-VMNetworkAdapter -VMName $vmName | Connect-VMNetworkAdapter -VMSwitch $switch 
+} else { 
+  Write-Error 'No internet adapters found'
+}
+`
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, switchName)
+	return err
+}
+
+func GetVirtualMachineSwitchName(vmName string) (string, error) {
+
+	var script = `
+param([string]$vmName)
+(Get-VMNetworkAdapter -VMName $vmName).SwitchName
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName)
+	if err != nil {
+		return "", err
+	}
+
+	return strings.TrimSpace(cmdOut), nil
+}
+
+func ConnectVirtualMachineNetworkAdapterToSwitch(vmName string, switchName string) error {
+
+	var script = `
+param([string]$vmName,[string]$switchName)
+Get-VMNetworkAdapter -VMName $vmName | Connect-VMNetworkAdapter -SwitchName $switchName
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, switchName)
+	return err
+}
+
+func UntagVirtualMachineNetworkAdapterVlan(vmName string, switchName string) error {
+
+	var script = `
+param([string]$vmName,[string]$switchName)
+Set-VMNetworkAdapterVlan -VMName $vmName -Untagged
+Set-VMNetworkAdapterVlan -ManagementOS -VMNetworkAdapterName $switchName -Untagged
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, switchName)
+	return err
+}
+
+func IsRunning(vmName string) (bool, error) {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+$vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Running
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName)
+
+	if err != nil {
+		return false, err
+	}
+
+	var isRunning = strings.TrimSpace(cmdOut) == "True"
+	return isRunning, err
+}
+
+func IsOff(vmName string) (bool, error) {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+$vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Off
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName)
+
+	if err != nil {
+		return false, err
+	}
+
+	var isRunning = strings.TrimSpace(cmdOut) == "True"
+	return isRunning, err
+}
+
+func Uptime(vmName string) (uint64, error) {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+$vm.Uptime.TotalSeconds
+`
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName)
+
+	if err != nil {
+		return 0, err
+	}
+
+	uptime, err := strconv.ParseUint(strings.TrimSpace(string(cmdOut)), 10, 64)
+
+	return uptime, err
+}
+
+func Mac(vmName string) (string, error) {
+	var script = `
+param([string]$vmName, [int]$adapterIndex)
+try {
+  $adapter = Get-VMNetworkAdapter -VMName $vmName -ErrorAction SilentlyContinue
+  $mac = $adapter[$adapterIndex].MacAddress
+  if($mac -eq $null) {
+    return ""
+  }
+} catch {
+  return ""
+}
+$mac
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, vmName, "0")
+
+	return cmdOut, err
+}
+
+func IpAddress(mac string) (string, error) {
+	var script = `
+param([string]$mac, [int]$addressIndex)
+try {
+  $ip = Get-Vm | %{$_.NetworkAdapters} | ?{$_.MacAddress -eq $mac} | %{$_.IpAddresses[$addressIndex]}
+	
+  if($ip -eq $null) {
+    return ""
+  }
+} catch {
+  return ""
+}
+$ip
+`
+
+	var ps powershell.PowerShellCmd
+	cmdOut, err := ps.Output(script, mac, "0")
+
+	return cmdOut, err
+}
+
+func TurnOff(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+if ($vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Running) {
+  Stop-VM -Name $vmName -TurnOff -Force -Confirm:$false
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func ShutDown(vmName string) error {
+
+	var script = `
+param([string]$vmName)
+$vm = Get-VM -Name $vmName -ErrorAction SilentlyContinue
+if ($vm.State -eq [Microsoft.HyperV.PowerShell.VMState]::Running) {
+  Stop-VM -Name $vmName -Force -Confirm:$false
+}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName)
+	return err
+}
+
+func TypeScanCodes(vmName string, scanCodes string) error {
+	if len(scanCodes) == 0 {
+		return nil
+	}
+
+	var script = `
+param([string]$vmName, [string]$scanCodes)
+	#Requires -Version 3
+	#Requires -RunAsAdministrator
+	
+	function Get-VMConsole
+	{
+	    [CmdletBinding()]
+	    param (
+	        [Parameter(Mandatory)]
+	        [string] $VMName
+	    )
+	
+	    $ErrorActionPreference = "Stop"
+	    
+	    $vm = Get-CimInstance -Namespace "root\virtualization\v2" -ClassName Msvm_ComputerSystem -ErrorAction Ignore -Verbose:$false | where ElementName -eq $VMName | select -first 1
+	    if ($vm -eq $null){
+	        Write-Error ("VirtualMachine({0}) is not found!" -f $VMName)
+	    }
+		
+	    $vmKeyboard = $vm | Get-CimAssociatedInstance -ResultClassName "Msvm_Keyboard" -ErrorAction Ignore -Verbose:$false
+		
+		if ($vmKeyboard -eq $null) {
+			$vmKeyboard = Get-CimInstance -Namespace "root\virtualization\v2" -ClassName Msvm_Keyboard -ErrorAction Ignore -Verbose:$false | where SystemName -eq $vm.Name | select -first 1
+		}
+
+		if ($vmKeyboard -eq $null) {
+			$vmKeyboard = Get-CimInstance -Namespace "root\virtualization" -ClassName Msvm_Keyboard -ErrorAction Ignore -Verbose:$false | where SystemName -eq $vm.Name | select -first 1
+		}
+		
+	    if ($vmKeyboard -eq $null){
+	        Write-Error ("VirtualMachine({0}) keyboard class is not found!" -f $VMName)
+	    }
+	
+	    #TODO: It may be better using New-Module -AsCustomObject to return console object?
+	
+	    #Console object to return
+	    $console = [pscustomobject] @{
+	        Msvm_ComputerSystem = $vm
+	        Msvm_Keyboard = $vmKeyboard
+	    }
+	
+	    #Need to import assembly to use System.Windows.Input.Key
+	    Add-Type -AssemblyName WindowsBase
+	
+	    #region Add Console Members
+	    $console | Add-Member -MemberType ScriptMethod -Name TypeText -Value {
+	        [OutputType([bool])]
+	        param (
+	            [ValidateNotNullOrEmpty()]
+	            [Parameter(Mandatory)]
+	            [string] $AsciiText
+	        )
+	        $result = $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "TypeText" -Arguments @{ asciiText = $AsciiText }
+	        return (0 -eq $result.ReturnValue)
+	    }
+	
+	    #Define method:TypeCtrlAltDel
+	    $console | Add-Member -MemberType ScriptMethod -Name TypeCtrlAltDel -Value {
+	        $result = $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "TypeCtrlAltDel"
+	        return (0 -eq $result.ReturnValue)
+	    }
+	
+	    #Define method:TypeKey
+	    $console | Add-Member -MemberType ScriptMethod -Name TypeKey -Value {
+	        [OutputType([bool])]
+	        param (
+	            [Parameter(Mandatory)]
+	            [Windows.Input.Key] $Key,
+	            [Windows.Input.ModifierKeys] $ModifierKey = [Windows.Input.ModifierKeys]::None
+	        )
+	
+	        $keyCode = [Windows.Input.KeyInterop]::VirtualKeyFromKey($Key)
+	        
+	        switch ($ModifierKey)
+	        {
+	            ([Windows.Input.ModifierKeys]::Control){ $modifierKeyCode = [Windows.Input.KeyInterop]::VirtualKeyFromKey([Windows.Input.Key]::LeftCtrl)}
+	            ([Windows.Input.ModifierKeys]::Alt){ $modifierKeyCode = [Windows.Input.KeyInterop]::VirtualKeyFromKey([Windows.Input.Key]::LeftAlt)}
+	            ([Windows.Input.ModifierKeys]::Shift){ $modifierKeyCode = [Windows.Input.KeyInterop]::VirtualKeyFromKey([Windows.Input.Key]::LeftShift)}
+	            ([Windows.Input.ModifierKeys]::Windows){ $modifierKeyCode = [Windows.Input.KeyInterop]::VirtualKeyFromKey([Windows.Input.Key]::LWin)}
+	        }
+	
+	        if ($ModifierKey -eq [Windows.Input.ModifierKeys]::None)
+	        {
+	            $result = $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "TypeKey" -Arguments @{ keyCode = $keyCode }
+	        }
+	        else
+	        {
+	            $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "PressKey" -Arguments @{ keyCode = $modifierKeyCode }
+	            $result = $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "TypeKey" -Arguments @{ keyCode = $keyCode }
+	            $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "ReleaseKey" -Arguments @{ keyCode = $modifierKeyCode }
+	        }
+	        $result = return (0 -eq $result.ReturnValue)
+	    }
+	
+	    #Define method:Scancodes
+	    $console | Add-Member -MemberType ScriptMethod -Name TypeScancodes -Value {
+	        [OutputType([bool])]
+	        param (
+	            [Parameter(Mandatory)]
+	            [byte[]] $ScanCodes
+	        )
+	        $result = $this.Msvm_Keyboard | Invoke-CimMethod -MethodName "TypeScancodes" -Arguments @{ ScanCodes = $ScanCodes }
+	        return (0 -eq $result.ReturnValue)
+	    }
+	
+	    #Define method:ExecCommand
+	    $console | Add-Member -MemberType ScriptMethod -Name ExecCommand -Value {
+	        param (
+	            [Parameter(Mandatory)]
+	            [string] $Command
+	        )
+	        if ([String]::IsNullOrEmpty($Command)){
+	            return
+	        }
+	
+	        $console.TypeText($Command) > $null
+	        $console.TypeKey([Windows.Input.Key]::Enter) > $null
+	        #sleep -Milliseconds 100
+	    }
+	
+	    #Define method:Dispose
+	    $console | Add-Member -MemberType ScriptMethod -Name Dispose -Value {
+	        $this.Msvm_ComputerSystem.Dispose()
+	        $this.Msvm_Keyboard.Dispose()
+	    }
+	    
+	
+	    #endregion
+	
+	    return $console
+	}
+	
+	$vmConsole = Get-VMConsole -VMName $vmName
+	$scanCodesToSend = ''
+	$scanCodes.Split(' ') | %{
+		$scanCode = $_
+			
+		if ($scanCode.StartsWith('wait')){
+			$timeToWait = $scanCode.Substring(4)
+			if (!$timeToWait){
+				$timeToWait = "1"
+			}
+						
+			if ($scanCodesToSend){
+				$scanCodesToSendByteArray = [byte[]]@($scanCodesToSend.Split(' ') | %{"0x$_"})
+				
+                $scanCodesToSendByteArray | %{
+				    $vmConsole.TypeScancodes($_)
+                }
+			}
+			
+			write-host "Special code <wait> found, will sleep $timeToWait second(s) at this point."
+			Start-Sleep -s $timeToWait
+			
+			$scanCodesToSend = ''
+		} else {
+			if ($scanCodesToSend){
+				write-host "Sending special code '$scanCodesToSend' '$scanCode'"
+				$scanCodesToSend = "$scanCodesToSend $scanCode"
+			} else {
+				write-host "Sending char '$scanCode'"
+				$scanCodesToSend = "$scanCode"
+			}
+		}
+	}
+	if ($scanCodesToSend){
+		$scanCodesToSendByteArray = [byte[]]@($scanCodesToSend.Split(' ') | %{"0x$_"})
+		
+        $scanCodesToSendByteArray | %{
+			$vmConsole.TypeScancodes($_)
+        }
+	}
+`
+
+	var ps powershell.PowerShellCmd
+	err := ps.Run(script, vmName, scanCodes)
+	return err
+}

powershell/powershell.go

@@ -0,0 +1,276 @@
+package powershell
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"os/exec"
+	"strconv"
+	"strings"
+)
+
+const (
+	powerShellFalse = "False"
+	powerShellTrue  = "True"
+)
+
+type PowerShellCmd struct {
+	Stdout io.Writer
+	Stderr io.Writer
+}
+
+func (ps *PowerShellCmd) Run(fileContents string, params ...string) error {
+	_, err := ps.Output(fileContents, params...)
+	return err
+}
+
+// Output runs the PowerShell command and returns its standard output.
+func (ps *PowerShellCmd) Output(fileContents string, params ...string) (string, error) {
+	path, err := ps.getPowerShellPath()
+	if err != nil {
+		return "", err
+	}
+
+	filename, err := saveScript(fileContents)
+	if err != nil {
+		return "", err
+	}
+
+	debug := os.Getenv("PACKER_POWERSHELL_DEBUG") != ""
+	verbose := debug || os.Getenv("PACKER_POWERSHELL_VERBOSE") != ""
+
+	if !debug {
+		defer os.Remove(filename)
+	}
+
+	args := createArgs(filename, params...)
+
+	if verbose {
+		log.Printf("Run: %s %s", path, args)
+	}
+
+	var stdout, stderr bytes.Buffer
+	command := exec.Command(path, args...)
+	command.Stdout = &stdout
+	command.Stderr = &stderr
+
+	err = command.Run()
+
+	if ps.Stdout != nil {
+		stdout.WriteTo(ps.Stdout)
+	}
+
+	if ps.Stderr != nil {
+		stderr.WriteTo(ps.Stderr)
+	}
+
+	stderrString := strings.TrimSpace(stderr.String())
+
+	if _, ok := err.(*exec.ExitError); ok {
+		err = fmt.Errorf("PowerShell error: %s", stderrString)
+	}
+
+	if len(stderrString) > 0 {
+		err = fmt.Errorf("PowerShell error: %s", stderrString)
+	}
+
+	stdoutString := strings.TrimSpace(stdout.String())
+
+	if verbose && stdoutString != "" {
+		log.Printf("stdout: %s", stdoutString)
+	}
+
+	// only write the stderr string if verbose because
+	// the error string will already be in the err return value.
+	if verbose && stderrString != "" {
+		log.Printf("stderr: %s", stderrString)
+	}
+
+	return stdoutString, err
+}
+
+func IsPowershellAvailable() (bool, string, error) {
+	path, err := exec.LookPath("powershell")
+	if err != nil {
+		return false, "", err
+	} else {
+		return true, path, err
+	}
+}
+
+func (ps *PowerShellCmd) getPowerShellPath() (string, error) {
+	powershellAvailable, path, err := IsPowershellAvailable()
+
+	if !powershellAvailable {
+		log.Fatal("Cannot find PowerShell in the path")
+		return "", err
+	}
+
+	return path, nil
+}
+
+func saveScript(fileContents string) (string, error) {
+	file, err := ioutil.TempFile(os.TempDir(), "ps")
+	if err != nil {
+		return "", err
+	}
+
+	_, err = file.Write([]byte(fileContents))
+	if err != nil {
+		return "", err
+	}
+
+	err = file.Close()
+	if err != nil {
+		return "", err
+	}
+
+	newFilename := file.Name() + ".ps1"
+	err = os.Rename(file.Name(), newFilename)
+	if err != nil {
+		return "", err
+	}
+
+	return newFilename, nil
+}
+
+func createArgs(filename string, params ...string) []string {
+	args := make([]string, len(params)+4)
+	args[0] = "-ExecutionPolicy"
+	args[1] = "Bypass"
+
+	args[2] = "-File"
+	args[3] = filename
+
+	for key, value := range params {
+		args[key+4] = value
+	}
+
+	return args
+}
+
+func GetHostAvailableMemory() float64 {
+
+	var script = "(Get-WmiObject Win32_OperatingSystem).FreePhysicalMemory / 1024"
+
+	var ps PowerShellCmd
+	output, _ := ps.Output(script)
+
+	freeMB, _ := strconv.ParseFloat(output, 64)
+
+	return freeMB
+}
+
+func GetHostName(ip string) (string, error) {
+
+	var script = `
+param([string]$ip)
+try {
+  $HostName = [System.Net.Dns]::GetHostEntry($ip).HostName
+  if ($HostName -ne $null) {
+    $HostName = $HostName.Split('.')[0]
+  }
+  $HostName
+} catch { }
+`
+
+	//
+	var ps PowerShellCmd
+	cmdOut, err := ps.Output(script, ip)
+	if err != nil {
+		return "", err
+	}
+
+	return cmdOut, nil
+}
+
+func IsCurrentUserAnAdministrator() (bool, error) {
+	var script = `
+$identity = [System.Security.Principal.WindowsIdentity]::GetCurrent()
+$principal = new-object System.Security.Principal.WindowsPrincipal($identity)
+$administratorRole = [System.Security.Principal.WindowsBuiltInRole]::Administrator
+return $principal.IsInRole($administratorRole)
+`
+
+	var ps PowerShellCmd
+	cmdOut, err := ps.Output(script)
+	if err != nil {
+		return false, err
+	}
+
+	res := strings.TrimSpace(cmdOut)
+	return res == powerShellTrue, nil
+}
+
+func ModuleExists(moduleName string) (bool, error) {
+
+	var script = `
+param([string]$moduleName)
+(Get-Module -Name $moduleName) -ne $null
+`
+	var ps PowerShellCmd
+	cmdOut, err := ps.Output(script)
+	if err != nil {
+		return false, err
+	}
+
+	res := strings.TrimSpace(string(cmdOut))
+
+	if res == powerShellFalse {
+		err := fmt.Errorf("PowerShell %s module is not loaded. Make sure %s feature is on.", moduleName, moduleName)
+		return false, err
+	}
+
+	return true, nil
+}
+
+func HasVirtualMachineVirtualizationExtensions() (bool, error) {
+
+	var script = `	
+(GET-Command Set-VMProcessor).parameters.keys -contains "ExposeVirtualizationExtensions"
+`
+
+	var ps PowerShellCmd
+	cmdOut, err := ps.Output(script)
+
+	if err != nil {
+		return false, err
+	}
+
+	var hasVirtualMachineVirtualizationExtensions = strings.TrimSpace(cmdOut) == "True"
+	return hasVirtualMachineVirtualizationExtensions, err
+}
+
+func SetUnattendedProductKey(path string, productKey string) error {
+
+	var script = `
+param([string]$path,[string]$productKey)
+
+$unattend = [xml](Get-Content -Path $path)
+$ns = @{ un = 'urn:schemas-microsoft-com:unattend' }
+
+$setupNode = $unattend | 
+  Select-Xml -XPath '//un:settings[@pass = "specialize"]/un:component[@name = "Microsoft-Windows-Shell-Setup"]' -Namespace $ns |
+  Select-Object -ExpandProperty Node
+
+$productKeyNode = $setupNode |
+  Select-Xml -XPath '//un:ProductKey' -Namespace $ns |
+  Select-Object -ExpandProperty Node
+
+if ($productKeyNode -eq $null) {
+    $productKeyNode = $unattend.CreateElement('ProductKey', $ns.un)
+    [Void]$setupNode.AppendChild($productKeyNode)
+}
+
+$productKeyNode.InnerText = $productKey
+
+$unattend.Save($path)
+`
+
+	var ps PowerShellCmd
+	err := ps.Run(script, path, productKey)
+	return err
+}

powershell/powershell_test.go

@@ -0,0 +1,69 @@
+package powershell
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestOutput(t *testing.T) {
+
+	var ps PowerShellCmd
+
+	powershellAvailable, _, _ := IsPowershellAvailable()
+
+	if !powershellAvailable {
+		t.Skipf("powershell not installed")
+		return
+	}
+
+	cmdOut, err := ps.Output("")
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if cmdOut != "" {
+		t.Fatalf("output '%v' is not ''", cmdOut)
+	}
+
+	trueOutput, err := ps.Output("$True")
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if trueOutput != "True" {
+		t.Fatalf("output '%v' is not 'True'", trueOutput)
+	}
+
+	falseOutput, err := ps.Output("$False")
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if falseOutput != "False" {
+		t.Fatalf("output '%v' is not 'False'", falseOutput)
+	}
+}
+
+func TestRunFile(t *testing.T) {
+	var ps PowerShellCmd
+
+	powershellAvailable, _, _ := IsPowershellAvailable()
+
+	if !powershellAvailable {
+		t.Skipf("powershell not installed")
+		return
+	}
+
+	var blockBuffer bytes.Buffer
+	blockBuffer.WriteString(`param([string]$a, [string]$b, [int]$x, [int]$y) if (Test-Path variable:global:ProgressPreference){$ProgressPreference="SilentlyContinue"}; $n = $x + $y; Write-Output "$a $b $n";`)
+
+	cmdOut, err := ps.Output(blockBuffer.String(), "a", "b", "5", "10")
+
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+
+	if cmdOut != "a b 15" {
+		t.Fatalf("output '%v' is not 'a b 15'", cmdOut)
+	}
+}

powershell/scriptbuilder.go

@@ -0,0 +1,29 @@
+package powershell
+
+import (
+	"bytes"
+)
+
+type ScriptBuilder struct {
+	buffer bytes.Buffer
+}
+
+func (b *ScriptBuilder) WriteLine(s string) (n int, err error) {
+	n, err = b.buffer.WriteString(s)
+	b.buffer.WriteString("\n")
+
+	return n + 1, err
+}
+
+func (b *ScriptBuilder) WriteString(s string) (n int, err error) {
+	n, err = b.buffer.WriteString(s)
+	return n, err
+}
+
+func (b *ScriptBuilder) String() string {
+	return b.buffer.String()
+}
+
+func (b *ScriptBuilder) Reset() {
+	b.buffer.Reset()
+}

provisioner/powershell/elevated.go

@@ -58,6 +58,7 @@ $t.XmlText = @'
   </Actions>
 </Task>
 '@
+if (Test-Path variable:global:ProgressPreference){$ProgressPreference="SilentlyContinue"}
 $f = $s.GetFolder("\")
 $f.RegisterTaskDefinition($name, $t, 6, "{{.User}}", "{{.Password}}", 1, $null) | Out-Null
 $t = $f.GetTask("\$name")
@@ -68,19 +69,16 @@ while ((!($t.state -eq 4)) -and ($sec -lt $timeout)) {
   Start-Sleep -s 1
   $sec++
 }
-function SlurpOutput($l) {
-  if (Test-Path $log) {
-    Get-Content $log | select -skip $l | ForEach {
-      $l += 1
-      Write-Host "$_"
-    }
-  }
-  return $l
-}
+
 $line = 0
 do {
   Start-Sleep -m 100
-  $line = SlurpOutput $line
+  if (Test-Path $log) {
+    Get-Content $log | select -skip $line | ForEach {
+      $line += 1
+      Write-Output "$_"
+    }
+  }
 } while (!($t.state -eq 3))
 $result = $t.LastTaskResult
 [System.Runtime.Interopservices.Marshal]::ReleaseComObject($s) | Out-Null

provisioner/powershell/powershell.go

@@ -2,16 +2,53 @@ package powershell
 
 import (
 	"encoding/base64"
+	"encoding/binary"
+	"unicode/utf16"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding/unicode"
 )
 
-func powershellEncode(buffer []byte) string {
-	// 2 byte chars to make PowerShell happy
-	wideCmd := ""
-	for _, b := range buffer {
-		wideCmd += string(b) + "\x00"
+func convertUtf8ToUtf16LE(message string) (string, error) {
+	utf16le := unicode.UTF16(unicode.LittleEndian, unicode.IgnoreBOM)
+	utfEncoder := utf16le.NewEncoder()
+	ut16LeEncodedMessage, err := utfEncoder.String(message)
+
+	return ut16LeEncodedMessage, err
+}
+
+// UTF16BytesToString converts UTF-16 encoded bytes, in big or little endian byte order,
+// to a UTF-8 encoded string.
+func UTF16BytesToString(b []byte, o binary.ByteOrder) string {
+	utf := make([]uint16, (len(b)+(2-1))/2)
+	for i := 0; i+(2-1) < len(b); i += 2 {
+		utf[i/2] = o.Uint16(b[i:])
+	}
+	if len(b)/2 < len(utf) {
+		utf[len(utf)-1] = utf8.RuneError
+	}
+	return string(utf16.Decode(utf))
+}
+
+func powershellEncode(message string) (string, error) {
+	utf16LEEncodedMessage, err := convertUtf8ToUtf16LE(message)
+	if err != nil {
+		return "", err
 	}
 
 	// Base64 encode the command
-	input := []uint8(wideCmd)
-	return base64.StdEncoding.EncodeToString(input)
+	input := []uint8(utf16LEEncodedMessage)
+	return base64.StdEncoding.EncodeToString(input), nil
+}
+
+func powershellDecode(messageBase64 string) (retour string, err error) {
+	messageUtf16LeByteArray, err := base64.StdEncoding.DecodeString(messageBase64)
+
+	if err != nil {
+		return "", err
+	}
+
+	message := UTF16BytesToString(messageUtf16LeByteArray, binary.LittleEndian)
+
+	return message, nil
 }

provisioner/powershell/provisioner.go

@@ -107,12 +107,13 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 			},
 		},
 	}, raws...)
+
 	if err != nil {
 		return err
 	}
 
 	if p.config.EnvVarFormat == "" {
-		p.config.EnvVarFormat = `$env:%s=\"%s\"; `
+		p.config.EnvVarFormat = `$env:%s="%s"; `
 	}
 
 	if p.config.ElevatedEnvVarFormat == "" {
@@ -120,11 +121,11 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 	}
 
 	if p.config.ExecuteCommand == "" {
-		p.config.ExecuteCommand = `powershell "& { {{.Vars}}{{.Path}}; exit $LastExitCode}"`
+		p.config.ExecuteCommand = `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode`
 	}
 
 	if p.config.ElevatedExecuteCommand == "" {
-		p.config.ElevatedExecuteCommand = `{{.Vars}}{{.Path}}`
+		p.config.ElevatedExecuteCommand = `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode`
 	}
 
 	if p.config.Inline != nil && len(p.config.Inline) == 0 {
@@ -347,8 +348,9 @@ func (p *Provisioner) createFlattenedEnvVars(elevated bool) (flattened string, e
 	// Split vars into key/value components
 	for _, envVar := range p.config.Vars {
 		keyValue := strings.Split(envVar, "=")
-		if len(keyValue) != 2 {
-			err = errors.New("Shell provisioner environment variables must be in key=value format")
+
+		if len(keyValue) != 2 || keyValue[0] == "" {
+			err = errors.New(fmt.Sprintf("Shell provisioner environment variables must be in key=value format. Currently it is '%s'", envVar))
 			return
 		}
 		envVars[keyValue[0]] = keyValue[1]
@@ -373,28 +375,57 @@ func (p *Provisioner) createFlattenedEnvVars(elevated bool) (flattened string, e
 }
 
 func (p *Provisioner) createCommandText() (command string, err error) {
+	// Return the interpolated command
+	if p.config.ElevatedUser == "" {
+		return p.createCommandTextNonPrivileged()
+	} else {
+		return p.createCommandTextPrivileged()
+	}
+}
+
+func (p *Provisioner) createCommandTextNonPrivileged() (command string, err error) {
 	// Create environment variables to set before executing the command
 	flattenedEnvVars, err := p.createFlattenedEnvVars(false)
 	if err != nil {
 		return "", err
 	}
-
 	p.config.ctx.Data = &ExecuteCommandTemplate{
 		Vars: flattenedEnvVars,
 		Path: p.config.RemotePath,
 	}
 	command, err = interpolate.Render(p.config.ExecuteCommand, &p.config.ctx)
+
 	if err != nil {
 		return "", fmt.Errorf("Error processing command: %s", err)
 	}
 
-	// Return the interpolated command
-	if p.config.ElevatedUser == "" {
-		return command, nil
+	commandText, err := p.generateCommandLineRunner(command)
+	if err != nil {
+		return "", fmt.Errorf("Error generating command line runner: %s", err)
 	}
 
+	return commandText, err
+}
+
+func (p *Provisioner) generateCommandLineRunner(command string) (commandText string, err error) {
+	log.Printf("Building command line for: %s", command)
+
+	base64EncodedCommand, err := powershellEncode(command)
+	if err != nil {
+		return "", fmt.Errorf("Error encoding command: %s", err)
+	}
+
+	commandText = "powershell -executionpolicy bypass -encodedCommand " + base64EncodedCommand
+
+	return commandText, nil
+}
+
+func (p *Provisioner) createCommandTextPrivileged() (command string, err error) {
 	// Can't double escape the env vars, lets create shiny new ones
-	flattenedEnvVars, err = p.createFlattenedEnvVars(true)
+	flattenedEnvVars, err := p.createFlattenedEnvVars(true)
+	if err != nil {
+		return "", err
+	}
 	p.config.ctx.Data = &ExecuteCommandTemplate{
 		Vars: flattenedEnvVars,
 		Path: p.config.RemotePath,
@@ -407,11 +438,14 @@ func (p *Provisioner) createCommandText() (command string, err error) {
 	// OK so we need an elevated shell runner to wrap our command, this is going to have its own path
 	// generate the script and update the command runner in the process
 	path, err := p.generateElevatedRunner(command)
+	if err != nil {
+		return "", fmt.Errorf("Error generating elevated runner: %s", err)
+	}
 
 	// Return the path to the elevated shell wrapper
 	command = fmt.Sprintf("powershell -executionpolicy bypass -file \"%s\"", path)
 
-	return
+	return command, err
 }
 
 func (p *Provisioner) generateElevatedRunner(command string) (uploadedPath string, err error) {
@@ -419,12 +453,18 @@ func (p *Provisioner) generateElevatedRunner(command string) (uploadedPath strin
 
 	// generate command
 	var buffer bytes.Buffer
+
+	base64EncodedCommand, err := powershellEncode(command)
+	if err != nil {
+		return "", fmt.Errorf("Error encoding command: %s", err)
+	}
+
 	err = elevatedTemplate.Execute(&buffer, elevatedOptions{
 		User:            p.config.ElevatedUser,
 		Password:        p.config.ElevatedPassword,
 		TaskDescription: "Packer elevated task",
 		TaskName:        fmt.Sprintf("packer-%s", uuid.TimeOrderedUUID()),
-		EncodedCommand:  powershellEncode([]byte(command + "; exit $LASTEXITCODE")),
+		EncodedCommand:  base64EncodedCommand,
 	})
 
 	if err != nil {

provisioner/powershell/provisioner_test.go

@@ -75,12 +75,12 @@ func TestProvisionerPrepare_Defaults(t *testing.T) {
 		t.Error("expected elevated_password to be empty")
 	}
 
-	if p.config.ExecuteCommand != "powershell \"& { {{.Vars}}{{.Path}}; exit $LastExitCode}\"" {
-		t.Fatalf("Default command should be powershell \"& { {{.Vars}}{{.Path}}; exit $LastExitCode}\", but got %s", p.config.ExecuteCommand)
+	if p.config.ExecuteCommand != `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode` {
+		t.Fatalf(`Default command should be "if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode", but got %s`, p.config.ExecuteCommand)
 	}
 
-	if p.config.ElevatedExecuteCommand != "{{.Vars}}{{.Path}}" {
-		t.Fatalf("Default command should be powershell {{.Vars}}{{.Path}}, but got %s", p.config.ElevatedExecuteCommand)
+	if p.config.ElevatedExecuteCommand != `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode` {
+		t.Fatalf(`Default command should be "if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};{{.Vars}}&'{{.Path}}';exit $LastExitCode", but got %s`, p.config.ElevatedExecuteCommand)
 	}
 
 	if p.config.ValidExitCodes == nil {
@@ -96,7 +96,7 @@ func TestProvisionerPrepare_Defaults(t *testing.T) {
 	}
 
 	if p.config.ElevatedEnvVarFormat != `$env:%s="%s"; ` {
-		t.Fatalf("Default command should be powershell \"{{.Vars}}{{.Path}}\", but got %s", p.config.ElevatedEnvVarFormat)
+		t.Fatalf(`Default command should be powershell '$env:%%s="%%s"; ', but got %s`, p.config.ElevatedEnvVarFormat)
 	}
 }
 
@@ -328,7 +328,7 @@ func TestProvisionerProvision_ValidExitCodes(t *testing.T) {
 	delete(config, "inline")
 
 	// Defaults provided by Packer
-	config["remote_path"] = "c:/Windows/Temp/inlineScript.bat"
+	config["remote_path"] = "c:/Windows/Temp/inlineScript.ps1"
 	config["inline"] = []string{"whoami"}
 	ui := testUi()
 	p := new(Provisioner)
@@ -351,7 +351,7 @@ func TestProvisionerProvision_InvalidExitCodes(t *testing.T) {
 	delete(config, "inline")
 
 	// Defaults provided by Packer
-	config["remote_path"] = "c:/Windows/Temp/inlineScript.bat"
+	config["remote_path"] = "c:/Windows/Temp/inlineScript.ps1"
 	config["inline"] = []string{"whoami"}
 	ui := testUi()
 	p := new(Provisioner)
@@ -374,7 +374,7 @@ func TestProvisionerProvision_Inline(t *testing.T) {
 	delete(config, "inline")
 
 	// Defaults provided by Packer
-	config["remote_path"] = "c:/Windows/Temp/inlineScript.bat"
+	config["remote_path"] = "c:/Windows/Temp/inlineScript.ps1"
 	config["inline"] = []string{"whoami"}
 	ui := testUi()
 	p := new(Provisioner)
@@ -389,18 +389,30 @@ func TestProvisionerProvision_Inline(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
+	expectedCommand := `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};$env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; &'c:/Windows/Temp/inlineScript.ps1';exit $LastExitCode`
+	expectedCommandBase64Encoded := `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`
+	expectedCommandPrefix := `powershell -executionpolicy bypass -encodedCommand `
+	expectedCommandEncoded := expectedCommandPrefix + expectedCommandBase64Encoded
 
-	// Should run the command without alteration
-	if comm.StartCmd.Command != expectedCommand {
-		t.Fatalf("Expect command to be: %s, got %s", expectedCommand, comm.StartCmd.Command)
+	actualCommandWithoutPrefix := strings.Replace(comm.StartCmd.Command, expectedCommandPrefix, "", -1)
+	actualCommandDecoded, err := powershellDecode(actualCommandWithoutPrefix)
+	if err != nil {
+		t.Fatal("should not have error when base64 decoding")
+	}
+
+	if actualCommandDecoded != expectedCommand {
+		t.Fatalf("Expected decoded: %s, got %s", expectedCommand, actualCommandDecoded)
+	}
+
+	if comm.StartCmd.Command != expectedCommandEncoded {
+		t.Fatalf("Expect command to be: %s, got %s", expectedCommandEncoded, comm.StartCmd.Command)
 	}
 
 	envVars := make([]string, 2)
 	envVars[0] = "FOO=BAR"
 	envVars[1] = "BAR=BAZ"
 	config["environment_vars"] = envVars
-	config["remote_path"] = "c:/Windows/Temp/inlineScript.bat"
+	config["remote_path"] = "c:/Windows/Temp/inlineScript.ps1"
 
 	p.Prepare(config)
 	err = p.Provision(ui, comm)
@@ -408,11 +420,23 @@ func TestProvisionerProvision_Inline(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand = `powershell "& { $env:BAR=\"BAZ\"; $env:FOO=\"BAR\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; c:/Windows/Temp/inlineScript.bat; exit $LastExitCode}"`
+	expectedCommand = `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};$env:BAR="BAZ"; $env:FOO="BAR"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; &'c:/Windows/Temp/inlineScript.ps1';exit $LastExitCode`
+	expectedCommandBase64Encoded = `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`
+	expectedCommandPrefix = `powershell -executionpolicy bypass -encodedCommand `
+	expectedCommandEncoded = expectedCommandPrefix + expectedCommandBase64Encoded
 
-	// Should run the command without alteration
-	if comm.StartCmd.Command != expectedCommand {
-		t.Fatalf("Expect command to be: %s, got: %s", expectedCommand, comm.StartCmd.Command)
+	actualCommandWithoutPrefix = strings.Replace(comm.StartCmd.Command, expectedCommandPrefix, "", -1)
+	actualCommandDecoded, err = powershellDecode(actualCommandWithoutPrefix)
+	if err != nil {
+		t.Fatal("should not have error when base64 decoding")
+	}
+
+	if actualCommandDecoded != expectedCommand {
+		t.Fatalf("Expected decoded: %s, got %s", expectedCommand, actualCommandDecoded)
+	}
+
+	if comm.StartCmd.Command != expectedCommandEncoded {
+		t.Fatalf("Expect command to be: %s, got %s", expectedCommandEncoded, comm.StartCmd.Command)
 	}
 }
 
@@ -434,12 +458,23 @@ func TestProvisionerProvision_Scripts(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	//powershell -Command "$env:PACKER_BUILDER_TYPE=''"; powershell -Command "$env:PACKER_BUILD_NAME='foobuild'";  powershell -Command c:/Windows/Temp/script.ps1
-	expectedCommand := `powershell "& { $env:PACKER_BUILDER_TYPE=\"footype\"; $env:PACKER_BUILD_NAME=\"foobuild\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
+	expectedCommand := `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};$env:PACKER_BUILDER_TYPE="footype"; $env:PACKER_BUILD_NAME="foobuild"; &'c:/Windows/Temp/script.ps1';exit $LastExitCode`
+	expectedCommandBase64Encoded := `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`
+	expectedCommandPrefix := `powershell -executionpolicy bypass -encodedCommand `
+	expectedCommandEncoded := expectedCommandPrefix + expectedCommandBase64Encoded
 
-	// Should run the command without alteration
-	if comm.StartCmd.Command != expectedCommand {
-		t.Fatalf("Expect command to be %s NOT %s", expectedCommand, comm.StartCmd.Command)
+	actualCommandWithoutPrefix := strings.Replace(comm.StartCmd.Command, expectedCommandPrefix, "", -1)
+	actualCommandDecoded, err := powershellDecode(actualCommandWithoutPrefix)
+	if err != nil {
+		t.Fatal("should not have error when base64 decoding")
+	}
+
+	if actualCommandDecoded != expectedCommand {
+		t.Fatalf("Expected decoded: %s, got %s", expectedCommand, actualCommandDecoded)
+	}
+
+	if comm.StartCmd.Command != expectedCommandEncoded {
+		t.Fatalf("Expect command to be: %s, got %s", expectedCommandEncoded, comm.StartCmd.Command)
 	}
 }
 
@@ -468,11 +503,23 @@ func TestProvisionerProvision_ScriptsWithEnvVars(t *testing.T) {
 		t.Fatal("should not have error")
 	}
 
-	expectedCommand := `powershell "& { $env:BAR=\"BAZ\"; $env:FOO=\"BAR\"; $env:PACKER_BUILDER_TYPE=\"footype\"; $env:PACKER_BUILD_NAME=\"foobuild\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}"`
+	expectedCommand := `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};$env:BAR="BAZ"; $env:FOO="BAR"; $env:PACKER_BUILDER_TYPE="footype"; $env:PACKER_BUILD_NAME="foobuild"; &'c:/Windows/Temp/script.ps1';exit $LastExitCode`
+	expectedCommandBase64Encoded := `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`
+	expectedCommandPrefix := `powershell -executionpolicy bypass -encodedCommand `
+	expectedCommandEncoded := expectedCommandPrefix + expectedCommandBase64Encoded
 
-	// Should run the command without alteration
-	if comm.StartCmd.Command != expectedCommand {
-		t.Fatalf("Expect command to be %s NOT %s", expectedCommand, comm.StartCmd.Command)
+	actualCommandWithoutPrefix := strings.Replace(comm.StartCmd.Command, expectedCommandPrefix, "", -1)
+	actualCommandDecoded, err := powershellDecode(actualCommandWithoutPrefix)
+	if err != nil {
+		t.Fatal("should not have error when base64 decoding")
+	}
+
+	if actualCommandDecoded != expectedCommand {
+		t.Fatalf("Expected decoded: %s, got %s", expectedCommand, actualCommandDecoded)
+	}
+
+	if comm.StartCmd.Command != expectedCommandEncoded {
+		t.Fatalf("Expect command to be: %s, got %s", expectedCommandEncoded, comm.StartCmd.Command)
 	}
 }
 
@@ -500,7 +547,7 @@ func TestProvisioner_createFlattenedElevatedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != `$env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -511,7 +558,7 @@ func TestProvisioner_createFlattenedElevatedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:FOO=\"bar\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != `$env:FOO="bar"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -522,7 +569,7 @@ func TestProvisioner_createFlattenedElevatedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:BAZ=\"qux\"; $env:FOO=\"bar\"; $env:PACKER_BUILDER_TYPE=\"iso\"; $env:PACKER_BUILD_NAME=\"vmware\"; " {
+	if flattenedEnvVars != `$env:BAZ="qux"; $env:FOO="bar"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 }
@@ -545,7 +592,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
+	if flattenedEnvVars != `$env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -556,7 +603,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:FOO=\\\"bar\\\"; $env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
+	if flattenedEnvVars != `$env:FOO="bar"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 
@@ -567,7 +614,7 @@ func TestProvisioner_createFlattenedEnvVars_windows(t *testing.T) {
 	if err != nil {
 		t.Fatalf("should not have error creating flattened env vars: %s", err)
 	}
-	if flattenedEnvVars != "$env:BAZ=\\\"qux\\\"; $env:FOO=\\\"bar\\\"; $env:PACKER_BUILDER_TYPE=\\\"iso\\\"; $env:PACKER_BUILD_NAME=\\\"vmware\\\"; " {
+	if flattenedEnvVars != `$env:BAZ="qux"; $env:FOO="bar"; $env:PACKER_BUILDER_TYPE="iso"; $env:PACKER_BUILD_NAME="vmware"; ` {
 		t.Fatalf("unexpected flattened env vars: %s", flattenedEnvVars)
 	}
 }
@@ -582,8 +629,25 @@ func TestProvision_createCommandText(t *testing.T) {
 
 	// Non-elevated
 	cmd, _ := p.createCommandText()
-	if cmd != "powershell \"& { $env:PACKER_BUILDER_TYPE=\\\"\\\"; $env:PACKER_BUILD_NAME=\\\"\\\"; c:/Windows/Temp/script.ps1; exit $LastExitCode}\"" {
-		t.Fatalf("Got unexpected non-elevated command: %s", cmd)
+
+	expectedCommand := `if (Test-Path variable:global:ProgressPreference){$ProgressPreference='SilentlyContinue'};$env:PACKER_BUILDER_TYPE=""; $env:PACKER_BUILD_NAME=""; &'c:/Windows/Temp/script.ps1';exit $LastExitCode`
+	expectedCommandBase64Encoded := `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`
+	expectedCommandPrefix := `powershell -executionpolicy bypass -encodedCommand `
+	expectedCommandEncoded := expectedCommandPrefix + expectedCommandBase64Encoded
+
+	actualCommandWithoutPrefix := strings.Replace(cmd, expectedCommandPrefix, "", -1)
+
+	actualCommandDecoded, err := powershellDecode(actualCommandWithoutPrefix)
+	if err != nil {
+		t.Fatal("should not have error when base64 decoding")
+	}
+
+	if actualCommandDecoded != expectedCommand {
+		t.Fatalf("Expected decoded: %s, got %s", expectedCommand, actualCommandDecoded)
+	}
+
+	if cmd != expectedCommandEncoded {
+		t.Fatalf("Expect command to be: %s, got %s", expectedCommandEncoded, cmd)
 	}
 
 	// Elevated

provisioner/windows-shell/provisioner.go

@@ -305,8 +305,8 @@ func (p *Provisioner) createFlattenedEnvVars() (flattened string, err error) {
 	// Split vars into key/value components
 	for _, envVar := range p.config.Vars {
 		keyValue := strings.Split(envVar, "=")
-		if len(keyValue) != 2 {
-			err = errors.New("Shell provisioner environment variables must be in key=value format")
+		if len(keyValue) != 2 || keyValue[0] == "" {
+			err = errors.New(fmt.Sprintf("Shell provisioner environment variables must be in key=value format. Currently it is '%s'", envVar))
 			return
 		}
 		envVars[keyValue[0]] = keyValue[1]

vendor/github.com/stretchr/testify/LICENSE

@@ -0,0 +1,22 @@
+Copyright (c) 2012 - 2013 Mat Ryer and Tyler Bunnell
+
+Please consider promoting this project if you find it useful.
+
+Permission is hereby granted, free of charge, to any person 
+obtaining a copy of this software and associated documentation 
+files (the "Software"), to deal in the Software without restriction, 
+including without limitation the rights to use, copy, modify, merge, 
+publish, distribute, sublicense, and/or sell copies of the Software, 
+and to permit persons to whom the Software is furnished to do so, 
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT 
+OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
+OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/golang.org/x/text/LICENSE

@@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

vendor/golang.org/x/text/PATENTS

@@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.

vendor/golang.org/x/text/encoding/encoding.go

@@ -0,0 +1,335 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package encoding defines an interface for character encodings, such as Shift
+// JIS and Windows 1252, that can convert to and from UTF-8.
+//
+// Encoding implementations are provided in other packages, such as
+// golang.org/x/text/encoding/charmap and
+// golang.org/x/text/encoding/japanese.
+package encoding // import "golang.org/x/text/encoding"
+
+import (
+	"errors"
+	"io"
+	"strconv"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding/internal/identifier"
+	"golang.org/x/text/transform"
+)
+
+// TODO:
+// - There seems to be some inconsistency in when decoders return errors
+//   and when not. Also documentation seems to suggest they shouldn't return
+//   errors at all (except for UTF-16).
+// - Encoders seem to rely on or at least benefit from the input being in NFC
+//   normal form. Perhaps add an example how users could prepare their output.
+
+// Encoding is a character set encoding that can be transformed to and from
+// UTF-8.
+type Encoding interface {
+	// NewDecoder returns a Decoder.
+	NewDecoder() *Decoder
+
+	// NewEncoder returns an Encoder.
+	NewEncoder() *Encoder
+}
+
+// A Decoder converts bytes to UTF-8. It implements transform.Transformer.
+//
+// Transforming source bytes that are not of that encoding will not result in an
+// error per se. Each byte that cannot be transcoded will be represented in the
+// output by the UTF-8 encoding of '\uFFFD', the replacement rune.
+type Decoder struct {
+	transform.Transformer
+
+	// This forces external creators of Decoders to use names in struct
+	// initializers, allowing for future extendibility without having to break
+	// code.
+	_ struct{}
+}
+
+// Bytes converts the given encoded bytes to UTF-8. It returns the converted
+// bytes or nil, err if any error occurred.
+func (d *Decoder) Bytes(b []byte) ([]byte, error) {
+	b, _, err := transform.Bytes(d, b)
+	if err != nil {
+		return nil, err
+	}
+	return b, nil
+}
+
+// String converts the given encoded string to UTF-8. It returns the converted
+// string or "", err if any error occurred.
+func (d *Decoder) String(s string) (string, error) {
+	s, _, err := transform.String(d, s)
+	if err != nil {
+		return "", err
+	}
+	return s, nil
+}
+
+// Reader wraps another Reader to decode its bytes.
+//
+// The Decoder may not be used for any other operation as long as the returned
+// Reader is in use.
+func (d *Decoder) Reader(r io.Reader) io.Reader {
+	return transform.NewReader(r, d)
+}
+
+// An Encoder converts bytes from UTF-8. It implements transform.Transformer.
+//
+// Each rune that cannot be transcoded will result in an error. In this case,
+// the transform will consume all source byte up to, not including the offending
+// rune. Transforming source bytes that are not valid UTF-8 will be replaced by
+// `\uFFFD`. To return early with an error instead, use transform.Chain to
+// preprocess the data with a UTF8Validator.
+type Encoder struct {
+	transform.Transformer
+
+	// This forces external creators of Encoders to use names in struct
+	// initializers, allowing for future extendibility without having to break
+	// code.
+	_ struct{}
+}
+
+// Bytes converts bytes from UTF-8. It returns the converted bytes or nil, err if
+// any error occurred.
+func (e *Encoder) Bytes(b []byte) ([]byte, error) {
+	b, _, err := transform.Bytes(e, b)
+	if err != nil {
+		return nil, err
+	}
+	return b, nil
+}
+
+// String converts a string from UTF-8. It returns the converted string or
+// "", err if any error occurred.
+func (e *Encoder) String(s string) (string, error) {
+	s, _, err := transform.String(e, s)
+	if err != nil {
+		return "", err
+	}
+	return s, nil
+}
+
+// Writer wraps another Writer to encode its UTF-8 output.
+//
+// The Encoder may not be used for any other operation as long as the returned
+// Writer is in use.
+func (e *Encoder) Writer(w io.Writer) io.Writer {
+	return transform.NewWriter(w, e)
+}
+
+// ASCIISub is the ASCII substitute character, as recommended by
+// http://unicode.org/reports/tr36/#Text_Comparison
+const ASCIISub = '\x1a'
+
+// Nop is the nop encoding. Its transformed bytes are the same as the source
+// bytes; it does not replace invalid UTF-8 sequences.
+var Nop Encoding = nop{}
+
+type nop struct{}
+
+func (nop) NewDecoder() *Decoder {
+	return &Decoder{Transformer: transform.Nop}
+}
+func (nop) NewEncoder() *Encoder {
+	return &Encoder{Transformer: transform.Nop}
+}
+
+// Replacement is the replacement encoding. Decoding from the replacement
+// encoding yields a single '\uFFFD' replacement rune. Encoding from UTF-8 to
+// the replacement encoding yields the same as the source bytes except that
+// invalid UTF-8 is converted to '\uFFFD'.
+//
+// It is defined at http://encoding.spec.whatwg.org/#replacement
+var Replacement Encoding = replacement{}
+
+type replacement struct{}
+
+func (replacement) NewDecoder() *Decoder {
+	return &Decoder{Transformer: replacementDecoder{}}
+}
+
+func (replacement) NewEncoder() *Encoder {
+	return &Encoder{Transformer: replacementEncoder{}}
+}
+
+func (replacement) ID() (mib identifier.MIB, other string) {
+	return identifier.Replacement, ""
+}
+
+type replacementDecoder struct{ transform.NopResetter }
+
+func (replacementDecoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	if len(dst) < 3 {
+		return 0, 0, transform.ErrShortDst
+	}
+	if atEOF {
+		const fffd = "\ufffd"
+		dst[0] = fffd[0]
+		dst[1] = fffd[1]
+		dst[2] = fffd[2]
+		nDst = 3
+	}
+	return nDst, len(src), nil
+}
+
+type replacementEncoder struct{ transform.NopResetter }
+
+func (replacementEncoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	r, size := rune(0), 0
+
+	for ; nSrc < len(src); nSrc += size {
+		r = rune(src[nSrc])
+
+		// Decode a 1-byte rune.
+		if r < utf8.RuneSelf {
+			size = 1
+
+		} else {
+			// Decode a multi-byte rune.
+			r, size = utf8.DecodeRune(src[nSrc:])
+			if size == 1 {
+				// All valid runes of size 1 (those below utf8.RuneSelf) were
+				// handled above. We have invalid UTF-8 or we haven't seen the
+				// full character yet.
+				if !atEOF && !utf8.FullRune(src[nSrc:]) {
+					err = transform.ErrShortSrc
+					break
+				}
+				r = '\ufffd'
+			}
+		}
+
+		if nDst+utf8.RuneLen(r) > len(dst) {
+			err = transform.ErrShortDst
+			break
+		}
+		nDst += utf8.EncodeRune(dst[nDst:], r)
+	}
+	return nDst, nSrc, err
+}
+
+// HTMLEscapeUnsupported wraps encoders to replace source runes outside the
+// repertoire of the destination encoding with HTML escape sequences.
+//
+// This wrapper exists to comply to URL and HTML forms requiring a
+// non-terminating legacy encoder. The produced sequences may lead to data
+// loss as they are indistinguishable from legitimate input. To avoid this
+// issue, use UTF-8 encodings whenever possible.
+func HTMLEscapeUnsupported(e *Encoder) *Encoder {
+	return &Encoder{Transformer: &errorHandler{e, errorToHTML}}
+}
+
+// ReplaceUnsupported wraps encoders to replace source runes outside the
+// repertoire of the destination encoding with an encoding-specific
+// replacement.
+//
+// This wrapper is only provided for backwards compatibility and legacy
+// handling. Its use is strongly discouraged. Use UTF-8 whenever possible.
+func ReplaceUnsupported(e *Encoder) *Encoder {
+	return &Encoder{Transformer: &errorHandler{e, errorToReplacement}}
+}
+
+type errorHandler struct {
+	*Encoder
+	handler func(dst []byte, r rune, err repertoireError) (n int, ok bool)
+}
+
+// TODO: consider making this error public in some form.
+type repertoireError interface {
+	Replacement() byte
+}
+
+func (h errorHandler) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	nDst, nSrc, err = h.Transformer.Transform(dst, src, atEOF)
+	for err != nil {
+		rerr, ok := err.(repertoireError)
+		if !ok {
+			return nDst, nSrc, err
+		}
+		r, sz := utf8.DecodeRune(src[nSrc:])
+		n, ok := h.handler(dst[nDst:], r, rerr)
+		if !ok {
+			return nDst, nSrc, transform.ErrShortDst
+		}
+		err = nil
+		nDst += n
+		if nSrc += sz; nSrc < len(src) {
+			var dn, sn int
+			dn, sn, err = h.Transformer.Transform(dst[nDst:], src[nSrc:], atEOF)
+			nDst += dn
+			nSrc += sn
+		}
+	}
+	return nDst, nSrc, err
+}
+
+func errorToHTML(dst []byte, r rune, err repertoireError) (n int, ok bool) {
+	buf := [8]byte{}
+	b := strconv.AppendUint(buf[:0], uint64(r), 10)
+	if n = len(b) + len("&#;"); n >= len(dst) {
+		return 0, false
+	}
+	dst[0] = '&'
+	dst[1] = '#'
+	dst[copy(dst[2:], b)+2] = ';'
+	return n, true
+}
+
+func errorToReplacement(dst []byte, r rune, err repertoireError) (n int, ok bool) {
+	if len(dst) == 0 {
+		return 0, false
+	}
+	dst[0] = err.Replacement()
+	return 1, true
+}
+
+// ErrInvalidUTF8 means that a transformer encountered invalid UTF-8.
+var ErrInvalidUTF8 = errors.New("encoding: invalid UTF-8")
+
+// UTF8Validator is a transformer that returns ErrInvalidUTF8 on the first
+// input byte that is not valid UTF-8.
+var UTF8Validator transform.Transformer = utf8Validator{}
+
+type utf8Validator struct{ transform.NopResetter }
+
+func (utf8Validator) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	n := len(src)
+	if n > len(dst) {
+		n = len(dst)
+	}
+	for i := 0; i < n; {
+		if c := src[i]; c < utf8.RuneSelf {
+			dst[i] = c
+			i++
+			continue
+		}
+		_, size := utf8.DecodeRune(src[i:])
+		if size == 1 {
+			// All valid runes of size 1 (those below utf8.RuneSelf) were
+			// handled above. We have invalid UTF-8 or we haven't seen the
+			// full character yet.
+			err = ErrInvalidUTF8
+			if !atEOF && !utf8.FullRune(src[i:]) {
+				err = transform.ErrShortSrc
+			}
+			return i, i, err
+		}
+		if i+size > len(dst) {
+			return i, i, transform.ErrShortDst
+		}
+		for ; size > 0; size-- {
+			dst[i] = src[i]
+			i++
+		}
+	}
+	if len(src) > len(dst) {
+		err = transform.ErrShortDst
+	}
+	return n, n, err
+}

vendor/golang.org/x/text/encoding/internal/identifier/gen.go

@@ -0,0 +1,137 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+package main
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"log"
+	"strings"
+
+	"golang.org/x/text/internal/gen"
+)
+
+type registry struct {
+	XMLName  xml.Name `xml:"registry"`
+	Updated  string   `xml:"updated"`
+	Registry []struct {
+		ID     string `xml:"id,attr"`
+		Record []struct {
+			Name string `xml:"name"`
+			Xref []struct {
+				Type string `xml:"type,attr"`
+				Data string `xml:"data,attr"`
+			} `xml:"xref"`
+			Desc struct {
+				Data string `xml:",innerxml"`
+				// Any []struct {
+				// 	Data string `xml:",chardata"`
+				// } `xml:",any"`
+				// Data string `xml:",chardata"`
+			} `xml:"description,"`
+			MIB   string   `xml:"value"`
+			Alias []string `xml:"alias"`
+			MIME  string   `xml:"preferred_alias"`
+		} `xml:"record"`
+	} `xml:"registry"`
+}
+
+func main() {
+	r := gen.OpenIANAFile("assignments/character-sets/character-sets.xml")
+	reg := &registry{}
+	if err := xml.NewDecoder(r).Decode(&reg); err != nil && err != io.EOF {
+		log.Fatalf("Error decoding charset registry: %v", err)
+	}
+	if len(reg.Registry) == 0 || reg.Registry[0].ID != "character-sets-1" {
+		log.Fatalf("Unexpected ID %s", reg.Registry[0].ID)
+	}
+
+	w := &bytes.Buffer{}
+	fmt.Fprintf(w, "const (\n")
+	for _, rec := range reg.Registry[0].Record {
+		constName := ""
+		for _, a := range rec.Alias {
+			if strings.HasPrefix(a, "cs") && strings.IndexByte(a, '-') == -1 {
+				// Some of the constant definitions have comments in them. Strip those.
+				constName = strings.Title(strings.SplitN(a[2:], "\n", 2)[0])
+			}
+		}
+		if constName == "" {
+			switch rec.MIB {
+			case "2085":
+				constName = "HZGB2312" // Not listed as alias for some reason.
+			default:
+				log.Fatalf("No cs alias defined for %s.", rec.MIB)
+			}
+		}
+		if rec.MIME != "" {
+			rec.MIME = fmt.Sprintf(" (MIME: %s)", rec.MIME)
+		}
+		fmt.Fprintf(w, "// %s is the MIB identifier with IANA name %s%s.\n//\n", constName, rec.Name, rec.MIME)
+		if len(rec.Desc.Data) > 0 {
+			fmt.Fprint(w, "// ")
+			d := xml.NewDecoder(strings.NewReader(rec.Desc.Data))
+			inElem := true
+			attr := ""
+			for {
+				t, err := d.Token()
+				if err != nil {
+					if err != io.EOF {
+						log.Fatal(err)
+					}
+					break
+				}
+				switch x := t.(type) {
+				case xml.CharData:
+					attr = "" // Don't need attribute info.
+					a := bytes.Split([]byte(x), []byte("\n"))
+					for i, b := range a {
+						if b = bytes.TrimSpace(b); len(b) != 0 {
+							if !inElem && i > 0 {
+								fmt.Fprint(w, "\n// ")
+							}
+							inElem = false
+							fmt.Fprintf(w, "%s ", string(b))
+						}
+					}
+				case xml.StartElement:
+					if x.Name.Local == "xref" {
+						inElem = true
+						use := false
+						for _, a := range x.Attr {
+							if a.Name.Local == "type" {
+								use = use || a.Value != "person"
+							}
+							if a.Name.Local == "data" && use {
+								attr = a.Value + " "
+							}
+						}
+					}
+				case xml.EndElement:
+					inElem = false
+					fmt.Fprint(w, attr)
+				}
+			}
+			fmt.Fprint(w, "\n")
+		}
+		for _, x := range rec.Xref {
+			switch x.Type {
+			case "rfc":
+				fmt.Fprintf(w, "// Reference: %s\n", strings.ToUpper(x.Data))
+			case "uri":
+				fmt.Fprintf(w, "// Reference: %s\n", x.Data)
+			}
+		}
+		fmt.Fprintf(w, "%s MIB = %s\n", constName, rec.MIB)
+		fmt.Fprintln(w)
+	}
+	fmt.Fprintln(w, ")")
+
+	gen.WriteGoFile("mib.go", "identifier", w.Bytes())
+}

vendor/golang.org/x/text/encoding/internal/identifier/identifier.go

@@ -0,0 +1,81 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:generate go run gen.go
+
+// Package identifier defines the contract between implementations of Encoding
+// and Index by defining identifiers that uniquely identify standardized coded
+// character sets (CCS) and character encoding schemes (CES), which we will
+// together refer to as encodings, for which Encoding implementations provide
+// converters to and from UTF-8. This package is typically only of concern to
+// implementers of Indexes and Encodings.
+//
+// One part of the identifier is the MIB code, which is defined by IANA and
+// uniquely identifies a CCS or CES. Each code is associated with data that
+// references authorities, official documentation as well as aliases and MIME
+// names.
+//
+// Not all CESs are covered by the IANA registry. The "other" string that is
+// returned by ID can be used to identify other character sets or versions of
+// existing ones.
+//
+// It is recommended that each package that provides a set of Encodings provide
+// the All and Common variables to reference all supported encodings and
+// commonly used subset. This allows Index implementations to include all
+// available encodings without explicitly referencing or knowing about them.
+package identifier
+
+// Note: this package is internal, but could be made public if there is a need
+// for writing third-party Indexes and Encodings.
+
+// References:
+// - http://source.icu-project.org/repos/icu/icu/trunk/source/data/mappings/convrtrs.txt
+// - http://www.iana.org/assignments/character-sets/character-sets.xhtml
+// - http://www.iana.org/assignments/ianacharset-mib/ianacharset-mib
+// - http://www.ietf.org/rfc/rfc2978.txt
+// - http://www.unicode.org/reports/tr22/
+// - http://www.w3.org/TR/encoding/
+// - http://www.w3.org/TR/encoding/indexes/encodings.json
+// - https://encoding.spec.whatwg.org/
+// - https://tools.ietf.org/html/rfc6657#section-5
+
+// Interface can be implemented by Encodings to define the CCS or CES for which
+// it implements conversions.
+type Interface interface {
+	// ID returns an encoding identifier. Exactly one of the mib and other
+	// values should be non-zero.
+	//
+	// In the usual case it is only necessary to indicate the MIB code. The
+	// other string can be used to specify encodings for which there is no MIB,
+	// such as "x-mac-dingbat".
+	//
+	// The other string may only contain the characters a-z, A-Z, 0-9, - and _.
+	ID() (mib MIB, other string)
+
+	// NOTE: the restrictions on the encoding are to allow extending the syntax
+	// with additional information such as versions, vendors and other variants.
+}
+
+// A MIB identifies an encoding. It is derived from the IANA MIB codes and adds
+// some identifiers for some encodings that are not covered by the IANA
+// standard.
+//
+// See http://www.iana.org/assignments/ianacharset-mib.
+type MIB uint16
+
+// These additional MIB types are not defined in IANA. They are added because
+// they are common and defined within the text repo.
+const (
+	// Unofficial marks the start of encodings not registered by IANA.
+	Unofficial MIB = 10000 + iota
+
+	// Replacement is the WhatWG replacement encoding.
+	Replacement
+
+	// XUserDefined is the code for x-user-defined.
+	XUserDefined
+
+	// MacintoshCyrillic is the code for x-mac-cyrillic.
+	MacintoshCyrillic
+)

vendor/golang.org/x/text/encoding/internal/internal.go

@@ -0,0 +1,75 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package internal contains code that is shared among encoding implementations.
+package internal
+
+import (
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/encoding/internal/identifier"
+	"golang.org/x/text/transform"
+)
+
+// Encoding is an implementation of the Encoding interface that adds the String
+// and ID methods to an existing encoding.
+type Encoding struct {
+	encoding.Encoding
+	Name string
+	MIB  identifier.MIB
+}
+
+// _ verifies that Encoding implements identifier.Interface.
+var _ identifier.Interface = (*Encoding)(nil)
+
+func (e *Encoding) String() string {
+	return e.Name
+}
+
+func (e *Encoding) ID() (mib identifier.MIB, other string) {
+	return e.MIB, ""
+}
+
+// SimpleEncoding is an Encoding that combines two Transformers.
+type SimpleEncoding struct {
+	Decoder transform.Transformer
+	Encoder transform.Transformer
+}
+
+func (e *SimpleEncoding) NewDecoder() *encoding.Decoder {
+	return &encoding.Decoder{Transformer: e.Decoder}
+}
+
+func (e *SimpleEncoding) NewEncoder() *encoding.Encoder {
+	return &encoding.Encoder{Transformer: e.Encoder}
+}
+
+// FuncEncoding is an Encoding that combines two functions returning a new
+// Transformer.
+type FuncEncoding struct {
+	Decoder func() transform.Transformer
+	Encoder func() transform.Transformer
+}
+
+func (e FuncEncoding) NewDecoder() *encoding.Decoder {
+	return &encoding.Decoder{Transformer: e.Decoder()}
+}
+
+func (e FuncEncoding) NewEncoder() *encoding.Encoder {
+	return &encoding.Encoder{Transformer: e.Encoder()}
+}
+
+// A RepertoireError indicates a rune is not in the repertoire of a destination
+// encoding. It is associated with an encoding-specific suggested replacement
+// byte.
+type RepertoireError byte
+
+// Error implements the error interrface.
+func (r RepertoireError) Error() string {
+	return "encoding: rune not supported by encoding."
+}
+
+// Replacement returns the replacement string associated with this error.
+func (r RepertoireError) Replacement() byte { return byte(r) }
+
+var ErrASCIIReplacement = RepertoireError(encoding.ASCIISub)

vendor/golang.org/x/text/encoding/unicode/override.go

@@ -0,0 +1,82 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package unicode
+
+import (
+	"golang.org/x/text/transform"
+)
+
+// BOMOverride returns a new decoder transformer that is identical to fallback,
+// except that the presence of a Byte Order Mark at the start of the input
+// causes it to switch to the corresponding Unicode decoding. It will only
+// consider BOMs for UTF-8, UTF-16BE, and UTF-16LE.
+//
+// This differs from using ExpectBOM by allowing a BOM to switch to UTF-8, not
+// just UTF-16 variants, and allowing falling back to any encoding scheme.
+//
+// This technique is recommended by the W3C for use in HTML 5: "For
+// compatibility with deployed content, the byte order mark (also known as BOM)
+// is considered more authoritative than anything else."
+// http://www.w3.org/TR/encoding/#specification-hooks
+//
+// Using BOMOverride is mostly intended for use cases where the first characters
+// of a fallback encoding are known to not be a BOM, for example, for valid HTML
+// and most encodings.
+func BOMOverride(fallback transform.Transformer) transform.Transformer {
+	// TODO: possibly allow a variadic argument of unicode encodings to allow
+	// specifying details of which fallbacks are supported as well as
+	// specifying the details of the implementations. This would also allow for
+	// support for UTF-32, which should not be supported by default.
+	return &bomOverride{fallback: fallback}
+}
+
+type bomOverride struct {
+	fallback transform.Transformer
+	current  transform.Transformer
+}
+
+func (d *bomOverride) Reset() {
+	d.current = nil
+	d.fallback.Reset()
+}
+
+var (
+	// TODO: we could use decode functions here, instead of allocating a new
+	// decoder on every NewDecoder as IgnoreBOM decoders can be stateless.
+	utf16le = UTF16(LittleEndian, IgnoreBOM)
+	utf16be = UTF16(BigEndian, IgnoreBOM)
+)
+
+const utf8BOM = "\ufeff"
+
+func (d *bomOverride) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	if d.current != nil {
+		return d.current.Transform(dst, src, atEOF)
+	}
+	if len(src) < 3 && !atEOF {
+		return 0, 0, transform.ErrShortSrc
+	}
+	d.current = d.fallback
+	bomSize := 0
+	if len(src) >= 2 {
+		if src[0] == 0xFF && src[1] == 0xFE {
+			d.current = utf16le.NewDecoder()
+			bomSize = 2
+		} else if src[0] == 0xFE && src[1] == 0xFF {
+			d.current = utf16be.NewDecoder()
+			bomSize = 2
+		} else if len(src) >= 3 &&
+			src[0] == utf8BOM[0] &&
+			src[1] == utf8BOM[1] &&
+			src[2] == utf8BOM[2] {
+			d.current = transform.Nop
+			bomSize = 3
+		}
+	}
+	if bomSize < len(src) {
+		nDst, nSrc, err = d.current.Transform(dst, src[bomSize:], atEOF)
+	}
+	return nDst, nSrc + bomSize, err
+}

vendor/golang.org/x/text/encoding/unicode/unicode.go

@@ -0,0 +1,434 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package unicode provides Unicode encodings such as UTF-16.
+package unicode // import "golang.org/x/text/encoding/unicode"
+
+import (
+	"errors"
+	"unicode/utf16"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/encoding/internal"
+	"golang.org/x/text/encoding/internal/identifier"
+	"golang.org/x/text/internal/utf8internal"
+	"golang.org/x/text/runes"
+	"golang.org/x/text/transform"
+)
+
+// TODO: I think the Transformers really should return errors on unmatched
+// surrogate pairs and odd numbers of bytes. This is not required by RFC 2781,
+// which leaves it open, but is suggested by WhatWG. It will allow for all error
+// modes as defined by WhatWG: fatal, HTML and Replacement. This would require
+// the introduction of some kind of error type for conveying the erroneous code
+// point.
+
+// UTF8 is the UTF-8 encoding.
+var UTF8 encoding.Encoding = utf8enc
+
+var utf8enc = &internal.Encoding{
+	&internal.SimpleEncoding{utf8Decoder{}, runes.ReplaceIllFormed()},
+	"UTF-8",
+	identifier.UTF8,
+}
+
+type utf8Decoder struct{ transform.NopResetter }
+
+func (utf8Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	var pSrc int // point from which to start copy in src
+	var accept utf8internal.AcceptRange
+
+	// The decoder can only make the input larger, not smaller.
+	n := len(src)
+	if len(dst) < n {
+		err = transform.ErrShortDst
+		n = len(dst)
+		atEOF = false
+	}
+	for nSrc < n {
+		c := src[nSrc]
+		if c < utf8.RuneSelf {
+			nSrc++
+			continue
+		}
+		first := utf8internal.First[c]
+		size := int(first & utf8internal.SizeMask)
+		if first == utf8internal.FirstInvalid {
+			goto handleInvalid // invalid starter byte
+		}
+		accept = utf8internal.AcceptRanges[first>>utf8internal.AcceptShift]
+		if nSrc+size > n {
+			if !atEOF {
+				// We may stop earlier than necessary here if the short sequence
+				// has invalid bytes. Not checking for this simplifies the code
+				// and may avoid duplicate computations in certain conditions.
+				if err == nil {
+					err = transform.ErrShortSrc
+				}
+				break
+			}
+			// Determine the maximal subpart of an ill-formed subsequence.
+			switch {
+			case nSrc+1 >= n || src[nSrc+1] < accept.Lo || accept.Hi < src[nSrc+1]:
+				size = 1
+			case nSrc+2 >= n || src[nSrc+2] < utf8internal.LoCB || utf8internal.HiCB < src[nSrc+2]:
+				size = 2
+			default:
+				size = 3 // As we are short, the maximum is 3.
+			}
+			goto handleInvalid
+		}
+		if c = src[nSrc+1]; c < accept.Lo || accept.Hi < c {
+			size = 1
+			goto handleInvalid // invalid continuation byte
+		} else if size == 2 {
+		} else if c = src[nSrc+2]; c < utf8internal.LoCB || utf8internal.HiCB < c {
+			size = 2
+			goto handleInvalid // invalid continuation byte
+		} else if size == 3 {
+		} else if c = src[nSrc+3]; c < utf8internal.LoCB || utf8internal.HiCB < c {
+			size = 3
+			goto handleInvalid // invalid continuation byte
+		}
+		nSrc += size
+		continue
+
+	handleInvalid:
+		// Copy the scanned input so far.
+		nDst += copy(dst[nDst:], src[pSrc:nSrc])
+
+		// Append RuneError to the destination.
+		const runeError = "\ufffd"
+		if nDst+len(runeError) > len(dst) {
+			return nDst, nSrc, transform.ErrShortDst
+		}
+		nDst += copy(dst[nDst:], runeError)
+
+		// Skip the maximal subpart of an ill-formed subsequence according to
+		// the W3C standard way instead of the Go way. This Transform is
+		// probably the only place in the text repo where it is warranted.
+		nSrc += size
+		pSrc = nSrc
+
+		// Recompute the maximum source length.
+		if sz := len(dst) - nDst; sz < len(src)-nSrc {
+			err = transform.ErrShortDst
+			n = nSrc + sz
+			atEOF = false
+		}
+	}
+	return nDst + copy(dst[nDst:], src[pSrc:nSrc]), nSrc, err
+}
+
+// UTF16 returns a UTF-16 Encoding for the given default endianness and byte
+// order mark (BOM) policy.
+//
+// When decoding from UTF-16 to UTF-8, if the BOMPolicy is IgnoreBOM then
+// neither BOMs U+FEFF nor noncharacters U+FFFE in the input stream will affect
+// the endianness used for decoding, and will instead be output as their
+// standard UTF-8 encodings: "\xef\xbb\xbf" and "\xef\xbf\xbe". If the BOMPolicy
+// is UseBOM or ExpectBOM a staring BOM is not written to the UTF-8 output.
+// Instead, it overrides the default endianness e for the remainder of the
+// transformation. Any subsequent BOMs U+FEFF or noncharacters U+FFFE will not
+// affect the endianness used, and will instead be output as their standard
+// UTF-8 encodings. For UseBOM, if there is no starting BOM, it will proceed
+// with the default Endianness. For ExpectBOM, in that case, the transformation
+// will return early with an ErrMissingBOM error.
+//
+// When encoding from UTF-8 to UTF-16, a BOM will be inserted at the start of
+// the output if the BOMPolicy is UseBOM or ExpectBOM. Otherwise, a BOM will not
+// be inserted. The UTF-8 input does not need to contain a BOM.
+//
+// There is no concept of a 'native' endianness. If the UTF-16 data is produced
+// and consumed in a greater context that implies a certain endianness, use
+// IgnoreBOM. Otherwise, use ExpectBOM and always produce and consume a BOM.
+//
+// In the language of http://www.unicode.org/faq/utf_bom.html#bom10, IgnoreBOM
+// corresponds to "Where the precise type of the data stream is known... the
+// BOM should not be used" and ExpectBOM corresponds to "A particular
+// protocol... may require use of the BOM".
+func UTF16(e Endianness, b BOMPolicy) encoding.Encoding {
+	return utf16Encoding{config{e, b}, mibValue[e][b&bomMask]}
+}
+
+// mibValue maps Endianness and BOMPolicy settings to MIB constants. Note that
+// some configurations map to the same MIB identifier. RFC 2781 has requirements
+// and recommendations. Some of the "configurations" are merely recommendations,
+// so multiple configurations could match.
+var mibValue = map[Endianness][numBOMValues]identifier.MIB{
+	BigEndian: [numBOMValues]identifier.MIB{
+		IgnoreBOM: identifier.UTF16BE,
+		UseBOM:    identifier.UTF16, // BigEnding default is preferred by RFC 2781.
+		// TODO: acceptBOM | strictBOM would map to UTF16BE as well.
+	},
+	LittleEndian: [numBOMValues]identifier.MIB{
+		IgnoreBOM: identifier.UTF16LE,
+		UseBOM:    identifier.UTF16, // LittleEndian default is allowed and preferred on Windows.
+		// TODO: acceptBOM | strictBOM would map to UTF16LE as well.
+	},
+	// ExpectBOM is not widely used and has no valid MIB identifier.
+}
+
+// All lists a configuration for each IANA-defined UTF-16 variant.
+var All = []encoding.Encoding{
+	UTF8,
+	UTF16(BigEndian, UseBOM),
+	UTF16(BigEndian, IgnoreBOM),
+	UTF16(LittleEndian, IgnoreBOM),
+}
+
+// BOMPolicy is a UTF-16 encoding's byte order mark policy.
+type BOMPolicy uint8
+
+const (
+	writeBOM   BOMPolicy = 0x01
+	acceptBOM  BOMPolicy = 0x02
+	requireBOM BOMPolicy = 0x04
+	bomMask    BOMPolicy = 0x07
+
+	// HACK: numBOMValues == 8 triggers a bug in the 1.4 compiler (cannot have a
+	// map of an array of length 8 of a type that is also used as a key or value
+	// in another map). See golang.org/issue/11354.
+	// TODO: consider changing this value back to 8 if the use of 1.4.* has
+	// been minimized.
+	numBOMValues = 8 + 1
+
+	// IgnoreBOM means to ignore any byte order marks.
+	IgnoreBOM BOMPolicy = 0
+	// Common and RFC 2781-compliant interpretation for UTF-16BE/LE.
+
+	// UseBOM means that the UTF-16 form may start with a byte order mark, which
+	// will be used to override the default encoding.
+	UseBOM BOMPolicy = writeBOM | acceptBOM
+	// Common and RFC 2781-compliant interpretation for UTF-16.
+
+	// ExpectBOM means that the UTF-16 form must start with a byte order mark,
+	// which will be used to override the default encoding.
+	ExpectBOM BOMPolicy = writeBOM | acceptBOM | requireBOM
+	// Used in Java as Unicode (not to be confused with Java's UTF-16) and
+	// ICU's UTF-16,version=1. Not compliant with RFC 2781.
+
+	// TODO (maybe): strictBOM: BOM must match Endianness. This would allow:
+	// - UTF-16(B|L)E,version=1: writeBOM | acceptBOM | requireBOM | strictBOM
+	//    (UnicodeBig and UnicodeLittle in Java)
+	// - RFC 2781-compliant, but less common interpretation for UTF-16(B|L)E:
+	//    acceptBOM | strictBOM (e.g. assigned to CheckBOM).
+	// This addition would be consistent with supporting ExpectBOM.
+)
+
+// Endianness is a UTF-16 encoding's default endianness.
+type Endianness bool
+
+const (
+	// BigEndian is UTF-16BE.
+	BigEndian Endianness = false
+	// LittleEndian is UTF-16LE.
+	LittleEndian Endianness = true
+)
+
+// ErrMissingBOM means that decoding UTF-16 input with ExpectBOM did not find a
+// starting byte order mark.
+var ErrMissingBOM = errors.New("encoding: missing byte order mark")
+
+type utf16Encoding struct {
+	config
+	mib identifier.MIB
+}
+
+type config struct {
+	endianness Endianness
+	bomPolicy  BOMPolicy
+}
+
+func (u utf16Encoding) NewDecoder() *encoding.Decoder {
+	return &encoding.Decoder{Transformer: &utf16Decoder{
+		initial: u.config,
+		current: u.config,
+	}}
+}
+
+func (u utf16Encoding) NewEncoder() *encoding.Encoder {
+	return &encoding.Encoder{Transformer: &utf16Encoder{
+		endianness:       u.endianness,
+		initialBOMPolicy: u.bomPolicy,
+		currentBOMPolicy: u.bomPolicy,
+	}}
+}
+
+func (u utf16Encoding) ID() (mib identifier.MIB, other string) {
+	return u.mib, ""
+}
+
+func (u utf16Encoding) String() string {
+	e, b := "B", ""
+	if u.endianness == LittleEndian {
+		e = "L"
+	}
+	switch u.bomPolicy {
+	case ExpectBOM:
+		b = "Expect"
+	case UseBOM:
+		b = "Use"
+	case IgnoreBOM:
+		b = "Ignore"
+	}
+	return "UTF-16" + e + "E (" + b + " BOM)"
+}
+
+type utf16Decoder struct {
+	initial config
+	current config
+}
+
+func (u *utf16Decoder) Reset() {
+	u.current = u.initial
+}
+
+func (u *utf16Decoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	if len(src) == 0 {
+		if atEOF && u.current.bomPolicy&requireBOM != 0 {
+			return 0, 0, ErrMissingBOM
+		}
+		return 0, 0, nil
+	}
+	if u.current.bomPolicy&acceptBOM != 0 {
+		if len(src) < 2 {
+			return 0, 0, transform.ErrShortSrc
+		}
+		switch {
+		case src[0] == 0xfe && src[1] == 0xff:
+			u.current.endianness = BigEndian
+			nSrc = 2
+		case src[0] == 0xff && src[1] == 0xfe:
+			u.current.endianness = LittleEndian
+			nSrc = 2
+		default:
+			if u.current.bomPolicy&requireBOM != 0 {
+				return 0, 0, ErrMissingBOM
+			}
+		}
+		u.current.bomPolicy = IgnoreBOM
+	}
+
+	var r rune
+	var dSize, sSize int
+	for nSrc < len(src) {
+		if nSrc+1 < len(src) {
+			x := uint16(src[nSrc+0])<<8 | uint16(src[nSrc+1])
+			if u.current.endianness == LittleEndian {
+				x = x>>8 | x<<8
+			}
+			r, sSize = rune(x), 2
+			if utf16.IsSurrogate(r) {
+				if nSrc+3 < len(src) {
+					x = uint16(src[nSrc+2])<<8 | uint16(src[nSrc+3])
+					if u.current.endianness == LittleEndian {
+						x = x>>8 | x<<8
+					}
+					// Save for next iteration if it is not a high surrogate.
+					if isHighSurrogate(rune(x)) {
+						r, sSize = utf16.DecodeRune(r, rune(x)), 4
+					}
+				} else if !atEOF {
+					err = transform.ErrShortSrc
+					break
+				}
+			}
+			if dSize = utf8.RuneLen(r); dSize < 0 {
+				r, dSize = utf8.RuneError, 3
+			}
+		} else if atEOF {
+			// Single trailing byte.
+			r, dSize, sSize = utf8.RuneError, 3, 1
+		} else {
+			err = transform.ErrShortSrc
+			break
+		}
+		if nDst+dSize > len(dst) {
+			err = transform.ErrShortDst
+			break
+		}
+		nDst += utf8.EncodeRune(dst[nDst:], r)
+		nSrc += sSize
+	}
+	return nDst, nSrc, err
+}
+
+func isHighSurrogate(r rune) bool {
+	return 0xDC00 <= r && r <= 0xDFFF
+}
+
+type utf16Encoder struct {
+	endianness       Endianness
+	initialBOMPolicy BOMPolicy
+	currentBOMPolicy BOMPolicy
+}
+
+func (u *utf16Encoder) Reset() {
+	u.currentBOMPolicy = u.initialBOMPolicy
+}
+
+func (u *utf16Encoder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	if u.currentBOMPolicy&writeBOM != 0 {
+		if len(dst) < 2 {
+			return 0, 0, transform.ErrShortDst
+		}
+		dst[0], dst[1] = 0xfe, 0xff
+		u.currentBOMPolicy = IgnoreBOM
+		nDst = 2
+	}
+
+	r, size := rune(0), 0
+	for nSrc < len(src) {
+		r = rune(src[nSrc])
+
+		// Decode a 1-byte rune.
+		if r < utf8.RuneSelf {
+			size = 1
+
+		} else {
+			// Decode a multi-byte rune.
+			r, size = utf8.DecodeRune(src[nSrc:])
+			if size == 1 {
+				// All valid runes of size 1 (those below utf8.RuneSelf) were
+				// handled above. We have invalid UTF-8 or we haven't seen the
+				// full character yet.
+				if !atEOF && !utf8.FullRune(src[nSrc:]) {
+					err = transform.ErrShortSrc
+					break
+				}
+			}
+		}
+
+		if r <= 0xffff {
+			if nDst+2 > len(dst) {
+				err = transform.ErrShortDst
+				break
+			}
+			dst[nDst+0] = uint8(r >> 8)
+			dst[nDst+1] = uint8(r)
+			nDst += 2
+		} else {
+			if nDst+4 > len(dst) {
+				err = transform.ErrShortDst
+				break
+			}
+			r1, r2 := utf16.EncodeRune(r)
+			dst[nDst+0] = uint8(r1 >> 8)
+			dst[nDst+1] = uint8(r1)
+			dst[nDst+2] = uint8(r2 >> 8)
+			dst[nDst+3] = uint8(r2)
+			nDst += 4
+		}
+		nSrc += size
+	}
+
+	if u.endianness == LittleEndian {
+		for i := 0; i < nDst; i += 2 {
+			dst[i], dst[i+1] = dst[i+1], dst[i]
+		}
+	}
+	return nDst, nSrc, err
+}

vendor/golang.org/x/text/internal/gen/code.go

@@ -0,0 +1,339 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package gen
+
+import (
+	"bytes"
+	"encoding/gob"
+	"fmt"
+	"hash"
+	"hash/fnv"
+	"io"
+	"log"
+	"os"
+	"reflect"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// This file contains utilities for generating code.
+
+// TODO: other write methods like:
+// - slices, maps, types, etc.
+
+// CodeWriter is a utility for writing structured code. It computes the content
+// hash and size of written content. It ensures there are newlines between
+// written code blocks.
+type CodeWriter struct {
+	buf  bytes.Buffer
+	Size int
+	Hash hash.Hash32 // content hash
+	gob  *gob.Encoder
+	// For comments we skip the usual one-line separator if they are followed by
+	// a code block.
+	skipSep bool
+}
+
+func (w *CodeWriter) Write(p []byte) (n int, err error) {
+	return w.buf.Write(p)
+}
+
+// NewCodeWriter returns a new CodeWriter.
+func NewCodeWriter() *CodeWriter {
+	h := fnv.New32()
+	return &CodeWriter{Hash: h, gob: gob.NewEncoder(h)}
+}
+
+// WriteGoFile appends the buffer with the total size of all created structures
+// and writes it as a Go file to the the given file with the given package name.
+func (w *CodeWriter) WriteGoFile(filename, pkg string) {
+	f, err := os.Create(filename)
+	if err != nil {
+		log.Fatalf("Could not create file %s: %v", filename, err)
+	}
+	defer f.Close()
+	if _, err = w.WriteGo(f, pkg); err != nil {
+		log.Fatalf("Error writing file %s: %v", filename, err)
+	}
+}
+
+// WriteGo appends the buffer with the total size of all created structures and
+// writes it as a Go file to the the given writer with the given package name.
+func (w *CodeWriter) WriteGo(out io.Writer, pkg string) (n int, err error) {
+	sz := w.Size
+	w.WriteComment("Total table size %d bytes (%dKiB); checksum: %X\n", sz, sz/1024, w.Hash.Sum32())
+	defer w.buf.Reset()
+	return WriteGo(out, pkg, w.buf.Bytes())
+}
+
+func (w *CodeWriter) printf(f string, x ...interface{}) {
+	fmt.Fprintf(w, f, x...)
+}
+
+func (w *CodeWriter) insertSep() {
+	if w.skipSep {
+		w.skipSep = false
+		return
+	}
+	// Use at least two newlines to ensure a blank space between the previous
+	// block. WriteGoFile will remove extraneous newlines.
+	w.printf("\n\n")
+}
+
+// WriteComment writes a comment block. All line starts are prefixed with "//".
+// Initial empty lines are gobbled. The indentation for the first line is
+// stripped from consecutive lines.
+func (w *CodeWriter) WriteComment(comment string, args ...interface{}) {
+	s := fmt.Sprintf(comment, args...)
+	s = strings.Trim(s, "\n")
+
+	// Use at least two newlines to ensure a blank space between the previous
+	// block. WriteGoFile will remove extraneous newlines.
+	w.printf("\n\n// ")
+	w.skipSep = true
+
+	// strip first indent level.
+	sep := "\n"
+	for ; len(s) > 0 && (s[0] == '\t' || s[0] == ' '); s = s[1:] {
+		sep += s[:1]
+	}
+
+	strings.NewReplacer(sep, "\n// ", "\n", "\n// ").WriteString(w, s)
+
+	w.printf("\n")
+}
+
+func (w *CodeWriter) writeSizeInfo(size int) {
+	w.printf("// Size: %d bytes\n", size)
+}
+
+// WriteConst writes a constant of the given name and value.
+func (w *CodeWriter) WriteConst(name string, x interface{}) {
+	w.insertSep()
+	v := reflect.ValueOf(x)
+
+	switch v.Type().Kind() {
+	case reflect.String:
+		// See golang.org/issue/13145.
+		const arbitraryCutoff = 16
+		if v.Len() > arbitraryCutoff {
+			w.printf("var %s %s = ", name, typeName(x))
+		} else {
+			w.printf("const %s %s = ", name, typeName(x))
+		}
+		w.WriteString(v.String())
+		w.printf("\n")
+	default:
+		w.printf("const %s = %#v\n", name, x)
+	}
+}
+
+// WriteVar writes a variable of the given name and value.
+func (w *CodeWriter) WriteVar(name string, x interface{}) {
+	w.insertSep()
+	v := reflect.ValueOf(x)
+	oldSize := w.Size
+	sz := int(v.Type().Size())
+	w.Size += sz
+
+	switch v.Type().Kind() {
+	case reflect.String:
+		w.printf("var %s %s = ", name, typeName(x))
+		w.WriteString(v.String())
+	case reflect.Struct:
+		w.gob.Encode(x)
+		fallthrough
+	case reflect.Slice, reflect.Array:
+		w.printf("var %s = ", name)
+		w.writeValue(v)
+		w.writeSizeInfo(w.Size - oldSize)
+	default:
+		w.printf("var %s %s = ", name, typeName(x))
+		w.gob.Encode(x)
+		w.writeValue(v)
+		w.writeSizeInfo(w.Size - oldSize)
+	}
+	w.printf("\n")
+}
+
+func (w *CodeWriter) writeValue(v reflect.Value) {
+	x := v.Interface()
+	switch v.Kind() {
+	case reflect.String:
+		w.WriteString(v.String())
+	case reflect.Array:
+		// Don't double count: callers of WriteArray count on the size being
+		// added, so we need to discount it here.
+		w.Size -= int(v.Type().Size())
+		w.writeSlice(x, true)
+	case reflect.Slice:
+		w.writeSlice(x, false)
+	case reflect.Struct:
+		w.printf("%s{\n", typeName(v.Interface()))
+		t := v.Type()
+		for i := 0; i < v.NumField(); i++ {
+			w.printf("%s: ", t.Field(i).Name)
+			w.writeValue(v.Field(i))
+			w.printf(",\n")
+		}
+		w.printf("}")
+	default:
+		w.printf("%#v", x)
+	}
+}
+
+// WriteString writes a string literal.
+func (w *CodeWriter) WriteString(s string) {
+	s = strings.Replace(s, `\`, `\\`, -1)
+	io.WriteString(w.Hash, s) // content hash
+	w.Size += len(s)
+
+	const maxInline = 40
+	if len(s) <= maxInline {
+		w.printf("%q", s)
+		return
+	}
+
+	// We will render the string as a multi-line string.
+	const maxWidth = 80 - 4 - len(`"`) - len(`" +`)
+
+	// When starting on its own line, go fmt indents line 2+ an extra level.
+	n, max := maxWidth, maxWidth-4
+
+	// Print "" +\n, if a string does not start on its own line.
+	b := w.buf.Bytes()
+	if p := len(bytes.TrimRight(b, " \t")); p > 0 && b[p-1] != '\n' {
+		w.printf("\"\" + // Size: %d bytes\n", len(s))
+		n, max = maxWidth, maxWidth
+	}
+
+	w.printf(`"`)
+
+	for sz, p := 0, 0; p < len(s); {
+		var r rune
+		r, sz = utf8.DecodeRuneInString(s[p:])
+		out := s[p : p+sz]
+		chars := 1
+		if !unicode.IsPrint(r) || r == utf8.RuneError || r == '"' {
+			switch sz {
+			case 1:
+				out = fmt.Sprintf("\\x%02x", s[p])
+			case 2, 3:
+				out = fmt.Sprintf("\\u%04x", r)
+			case 4:
+				out = fmt.Sprintf("\\U%08x", r)
+			}
+			chars = len(out)
+		}
+		if n -= chars; n < 0 {
+			w.printf("\" +\n\"")
+			n = max - len(out)
+		}
+		w.printf("%s", out)
+		p += sz
+	}
+	w.printf(`"`)
+}
+
+// WriteSlice writes a slice value.
+func (w *CodeWriter) WriteSlice(x interface{}) {
+	w.writeSlice(x, false)
+}
+
+// WriteArray writes an array value.
+func (w *CodeWriter) WriteArray(x interface{}) {
+	w.writeSlice(x, true)
+}
+
+func (w *CodeWriter) writeSlice(x interface{}, isArray bool) {
+	v := reflect.ValueOf(x)
+	w.gob.Encode(v.Len())
+	w.Size += v.Len() * int(v.Type().Elem().Size())
+	name := typeName(x)
+	if isArray {
+		name = fmt.Sprintf("[%d]%s", v.Len(), name[strings.Index(name, "]")+1:])
+	}
+	if isArray {
+		w.printf("%s{\n", name)
+	} else {
+		w.printf("%s{ // %d elements\n", name, v.Len())
+	}
+
+	switch kind := v.Type().Elem().Kind(); kind {
+	case reflect.String:
+		for _, s := range x.([]string) {
+			w.WriteString(s)
+			w.printf(",\n")
+		}
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
+		// nLine and nBlock are the number of elements per line and block.
+		nLine, nBlock, format := 8, 64, "%d,"
+		switch kind {
+		case reflect.Uint8:
+			format = "%#02x,"
+		case reflect.Uint16:
+			format = "%#04x,"
+		case reflect.Uint32:
+			nLine, nBlock, format = 4, 32, "%#08x,"
+		case reflect.Uint, reflect.Uint64:
+			nLine, nBlock, format = 4, 32, "%#016x,"
+		case reflect.Int8:
+			nLine = 16
+		}
+		n := nLine
+		for i := 0; i < v.Len(); i++ {
+			if i%nBlock == 0 && v.Len() > nBlock {
+				w.printf("// Entry %X - %X\n", i, i+nBlock-1)
+			}
+			x := v.Index(i).Interface()
+			w.gob.Encode(x)
+			w.printf(format, x)
+			if n--; n == 0 {
+				n = nLine
+				w.printf("\n")
+			}
+		}
+		w.printf("\n")
+	case reflect.Struct:
+		zero := reflect.Zero(v.Type().Elem()).Interface()
+		for i := 0; i < v.Len(); i++ {
+			x := v.Index(i).Interface()
+			w.gob.EncodeValue(v)
+			if !reflect.DeepEqual(zero, x) {
+				line := fmt.Sprintf("%#v,\n", x)
+				line = line[strings.IndexByte(line, '{'):]
+				w.printf("%d: ", i)
+				w.printf(line)
+			}
+		}
+	case reflect.Array:
+		for i := 0; i < v.Len(); i++ {
+			w.printf("%d: %#v,\n", i, v.Index(i).Interface())
+		}
+	default:
+		panic("gen: slice elem type not supported")
+	}
+	w.printf("}")
+}
+
+// WriteType writes a definition of the type of the given value and returns the
+// type name.
+func (w *CodeWriter) WriteType(x interface{}) string {
+	t := reflect.TypeOf(x)
+	w.printf("type %s struct {\n", t.Name())
+	for i := 0; i < t.NumField(); i++ {
+		w.printf("\t%s %s\n", t.Field(i).Name, t.Field(i).Type)
+	}
+	w.printf("}\n")
+	return t.Name()
+}
+
+// typeName returns the name of the go type of x.
+func typeName(x interface{}) string {
+	t := reflect.ValueOf(x).Type()
+	return strings.Replace(fmt.Sprint(t), "main.", "", 1)
+}

vendor/golang.org/x/text/internal/gen/gen.go

@@ -0,0 +1,281 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package gen contains common code for the various code generation tools in the
+// text repository. Its usage ensures consistency between tools.
+//
+// This package defines command line flags that are common to most generation
+// tools. The flags allow for specifying specific Unicode and CLDR versions
+// in the public Unicode data repository (http://www.unicode.org/Public).
+//
+// A local Unicode data mirror can be set through the flag -local or the
+// environment variable UNICODE_DIR. The former takes precedence. The local
+// directory should follow the same structure as the public repository.
+//
+// IANA data can also optionally be mirrored by putting it in the iana directory
+// rooted at the top of the local mirror. Beware, though, that IANA data is not
+// versioned. So it is up to the developer to use the right version.
+package gen // import "golang.org/x/text/internal/gen"
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"go/build"
+	"go/format"
+	"io"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"os"
+	"path"
+	"path/filepath"
+	"sync"
+	"unicode"
+
+	"golang.org/x/text/unicode/cldr"
+)
+
+var (
+	url = flag.String("url",
+		"http://www.unicode.org/Public",
+		"URL of Unicode database directory")
+	iana = flag.String("iana",
+		"http://www.iana.org",
+		"URL of the IANA repository")
+	unicodeVersion = flag.String("unicode",
+		getEnv("UNICODE_VERSION", unicode.Version),
+		"unicode version to use")
+	cldrVersion = flag.String("cldr",
+		getEnv("CLDR_VERSION", cldr.Version),
+		"cldr version to use")
+)
+
+func getEnv(name, def string) string {
+	if v := os.Getenv(name); v != "" {
+		return v
+	}
+	return def
+}
+
+// Init performs common initialization for a gen command. It parses the flags
+// and sets up the standard logging parameters.
+func Init() {
+	log.SetPrefix("")
+	log.SetFlags(log.Lshortfile)
+	flag.Parse()
+}
+
+const header = `// This file was generated by go generate; DO NOT EDIT
+
+package %s
+
+`
+
+// UnicodeVersion reports the requested Unicode version.
+func UnicodeVersion() string {
+	return *unicodeVersion
+}
+
+// UnicodeVersion reports the requested CLDR version.
+func CLDRVersion() string {
+	return *cldrVersion
+}
+
+// IsLocal reports whether data files are available locally.
+func IsLocal() bool {
+	dir, err := localReadmeFile()
+	if err != nil {
+		return false
+	}
+	if _, err = os.Stat(dir); err != nil {
+		return false
+	}
+	return true
+}
+
+// OpenUCDFile opens the requested UCD file. The file is specified relative to
+// the public Unicode root directory. It will call log.Fatal if there are any
+// errors.
+func OpenUCDFile(file string) io.ReadCloser {
+	return openUnicode(path.Join(*unicodeVersion, "ucd", file))
+}
+
+// OpenCLDRCoreZip opens the CLDR core zip file. It will call log.Fatal if there
+// are any errors.
+func OpenCLDRCoreZip() io.ReadCloser {
+	return OpenUnicodeFile("cldr", *cldrVersion, "core.zip")
+}
+
+// OpenUnicodeFile opens the requested file of the requested category from the
+// root of the Unicode data archive. The file is specified relative to the
+// public Unicode root directory. If version is "", it will use the default
+// Unicode version. It will call log.Fatal if there are any errors.
+func OpenUnicodeFile(category, version, file string) io.ReadCloser {
+	if version == "" {
+		version = UnicodeVersion()
+	}
+	return openUnicode(path.Join(category, version, file))
+}
+
+// OpenIANAFile opens the requested IANA file. The file is specified relative
+// to the IANA root, which is typically either http://www.iana.org or the
+// iana directory in the local mirror. It will call log.Fatal if there are any
+// errors.
+func OpenIANAFile(path string) io.ReadCloser {
+	return Open(*iana, "iana", path)
+}
+
+var (
+	dirMutex sync.Mutex
+	localDir string
+)
+
+const permissions = 0755
+
+func localReadmeFile() (string, error) {
+	p, err := build.Import("golang.org/x/text", "", build.FindOnly)
+	if err != nil {
+		return "", fmt.Errorf("Could not locate package: %v", err)
+	}
+	return filepath.Join(p.Dir, "DATA", "README"), nil
+}
+
+func getLocalDir() string {
+	dirMutex.Lock()
+	defer dirMutex.Unlock()
+
+	readme, err := localReadmeFile()
+	if err != nil {
+		log.Fatal(err)
+	}
+	dir := filepath.Dir(readme)
+	if _, err := os.Stat(readme); err != nil {
+		if err := os.MkdirAll(dir, permissions); err != nil {
+			log.Fatalf("Could not create directory: %v", err)
+		}
+		ioutil.WriteFile(readme, []byte(readmeTxt), permissions)
+	}
+	return dir
+}
+
+const readmeTxt = `Generated by golang.org/x/text/internal/gen. DO NOT EDIT.
+
+This directory contains downloaded files used to generate the various tables
+in the golang.org/x/text subrepo.
+
+Note that the language subtag repo (iana/assignments/language-subtag-registry)
+and all other times in the iana subdirectory are not versioned and will need
+to be periodically manually updated. The easiest way to do this is to remove
+the entire iana directory. This is mostly of concern when updating the language
+package.
+`
+
+// Open opens subdir/path if a local directory is specified and the file exists,
+// where subdir is a directory relative to the local root, or fetches it from
+// urlRoot/path otherwise. It will call log.Fatal if there are any errors.
+func Open(urlRoot, subdir, path string) io.ReadCloser {
+	file := filepath.Join(getLocalDir(), subdir, filepath.FromSlash(path))
+	return open(file, urlRoot, path)
+}
+
+func openUnicode(path string) io.ReadCloser {
+	file := filepath.Join(getLocalDir(), filepath.FromSlash(path))
+	return open(file, *url, path)
+}
+
+// TODO: automatically periodically update non-versioned files.
+
+func open(file, urlRoot, path string) io.ReadCloser {
+	if f, err := os.Open(file); err == nil {
+		return f
+	}
+	r := get(urlRoot, path)
+	defer r.Close()
+	b, err := ioutil.ReadAll(r)
+	if err != nil {
+		log.Fatalf("Could not download file: %v", err)
+	}
+	os.MkdirAll(filepath.Dir(file), permissions)
+	if err := ioutil.WriteFile(file, b, permissions); err != nil {
+		log.Fatalf("Could not create file: %v", err)
+	}
+	return ioutil.NopCloser(bytes.NewReader(b))
+}
+
+func get(root, path string) io.ReadCloser {
+	url := root + "/" + path
+	fmt.Printf("Fetching %s...", url)
+	defer fmt.Println(" done.")
+	resp, err := http.Get(url)
+	if err != nil {
+		log.Fatalf("HTTP GET: %v", err)
+	}
+	if resp.StatusCode != 200 {
+		log.Fatalf("Bad GET status for %q: %q", url, resp.Status)
+	}
+	return resp.Body
+}
+
+// TODO: use Write*Version in all applicable packages.
+
+// WriteUnicodeVersion writes a constant for the Unicode version from which the
+// tables are generated.
+func WriteUnicodeVersion(w io.Writer) {
+	fmt.Fprintf(w, "// UnicodeVersion is the Unicode version from which the tables in this package are derived.\n")
+	fmt.Fprintf(w, "const UnicodeVersion = %q\n\n", UnicodeVersion())
+}
+
+// WriteCLDRVersion writes a constant for the CLDR version from which the
+// tables are generated.
+func WriteCLDRVersion(w io.Writer) {
+	fmt.Fprintf(w, "// CLDRVersion is the CLDR version from which the tables in this package are derived.\n")
+	fmt.Fprintf(w, "const CLDRVersion = %q\n\n", CLDRVersion())
+}
+
+// WriteGoFile prepends a standard file comment and package statement to the
+// given bytes, applies gofmt, and writes them to a file with the given name.
+// It will call log.Fatal if there are any errors.
+func WriteGoFile(filename, pkg string, b []byte) {
+	w, err := os.Create(filename)
+	if err != nil {
+		log.Fatalf("Could not create file %s: %v", filename, err)
+	}
+	defer w.Close()
+	if _, err = WriteGo(w, pkg, b); err != nil {
+		log.Fatalf("Error writing file %s: %v", filename, err)
+	}
+}
+
+// WriteGo prepends a standard file comment and package statement to the given
+// bytes, applies gofmt, and writes them to w.
+func WriteGo(w io.Writer, pkg string, b []byte) (n int, err error) {
+	src := []byte(fmt.Sprintf(header, pkg))
+	src = append(src, b...)
+	formatted, err := format.Source(src)
+	if err != nil {
+		// Print the generated code even in case of an error so that the
+		// returned error can be meaningfully interpreted.
+		n, _ = w.Write(src)
+		return n, err
+	}
+	return w.Write(formatted)
+}
+
+// Repackage rewrites a Go file from belonging to package main to belonging to
+// the given package.
+func Repackage(inFile, outFile, pkg string) {
+	src, err := ioutil.ReadFile(inFile)
+	if err != nil {
+		log.Fatalf("reading %s: %v", inFile, err)
+	}
+	const toDelete = "package main\n\n"
+	i := bytes.Index(src, []byte(toDelete))
+	if i < 0 {
+		log.Fatalf("Could not find %q in %s.", toDelete, inFile)
+	}
+	w := &bytes.Buffer{}
+	w.Write(src[i+len(toDelete):])
+	WriteGoFile(outFile, pkg, w.Bytes())
+}

vendor/golang.org/x/text/internal/utf8internal/utf8internal.go

@@ -0,0 +1,87 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package utf8internal contains low-level utf8-related constants, tables, etc.
+// that are used internally by the text package.
+package utf8internal
+
+// The default lowest and highest continuation byte.
+const (
+	LoCB = 0x80 // 1000 0000
+	HiCB = 0xBF // 1011 1111
+)
+
+// Constants related to getting information of first bytes of UTF-8 sequences.
+const (
+	// ASCII identifies a UTF-8 byte as ASCII.
+	ASCII = as
+
+	// FirstInvalid indicates a byte is invalid as a first byte of a UTF-8
+	// sequence.
+	FirstInvalid = xx
+
+	// SizeMask is a mask for the size bits. Use use x&SizeMask to get the size.
+	SizeMask = 7
+
+	// AcceptShift is the right-shift count for the first byte info byte to get
+	// the index into the AcceptRanges table. See AcceptRanges.
+	AcceptShift = 4
+
+	// The names of these constants are chosen to give nice alignment in the
+	// table below. The first nibble is an index into acceptRanges or F for
+	// special one-byte cases. The second nibble is the Rune length or the
+	// Status for the special one-byte case.
+	xx = 0xF1 // invalid: size 1
+	as = 0xF0 // ASCII: size 1
+	s1 = 0x02 // accept 0, size 2
+	s2 = 0x13 // accept 1, size 3
+	s3 = 0x03 // accept 0, size 3
+	s4 = 0x23 // accept 2, size 3
+	s5 = 0x34 // accept 3, size 4
+	s6 = 0x04 // accept 0, size 4
+	s7 = 0x44 // accept 4, size 4
+)
+
+// First is information about the first byte in a UTF-8 sequence.
+var First = [256]uint8{
+	//   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x00-0x0F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x10-0x1F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x20-0x2F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x30-0x3F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x40-0x4F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x50-0x5F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x60-0x6F
+	as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x70-0x7F
+	//   1   2   3   4   5   6   7   8   9   A   B   C   D   E   F
+	xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x80-0x8F
+	xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x90-0x9F
+	xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xA0-0xAF
+	xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xB0-0xBF
+	xx, xx, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xC0-0xCF
+	s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xD0-0xDF
+	s2, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s4, s3, s3, // 0xE0-0xEF
+	s5, s6, s6, s6, s7, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xF0-0xFF
+}
+
+// AcceptRange gives the range of valid values for the second byte in a UTF-8
+// sequence for any value for First that is not ASCII or FirstInvalid.
+type AcceptRange struct {
+	Lo uint8 // lowest value for second byte.
+	Hi uint8 // highest value for second byte.
+}
+
+// AcceptRanges is a slice of AcceptRange values. For a given byte sequence b
+//
+//		AcceptRanges[First[b[0]]>>AcceptShift]
+//
+// will give the value of AcceptRange for the multi-byte UTF-8 sequence starting
+// at b[0].
+var AcceptRanges = [...]AcceptRange{
+	0: {LoCB, HiCB},
+	1: {0xA0, HiCB},
+	2: {LoCB, 0x9F},
+	3: {0x90, HiCB},
+	4: {LoCB, 0x8F},
+}

vendor/golang.org/x/text/runes/cond.go

@@ -0,0 +1,187 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package runes
+
+import (
+	"unicode/utf8"
+
+	"golang.org/x/text/transform"
+)
+
+// Note: below we pass invalid UTF-8 to the tIn and tNotIn transformers as is.
+// This is done for various reasons:
+// - To retain the semantics of the Nop transformer: if input is passed to a Nop
+//   one would expect it to be unchanged.
+// - It would be very expensive to pass a converted RuneError to a transformer:
+//   a transformer might need more source bytes after RuneError, meaning that
+//   the only way to pass it safely is to create a new buffer and manage the
+//   intermingling of RuneErrors and normal input.
+// - Many transformers leave ill-formed UTF-8 as is, so this is not
+//   inconsistent. Generally ill-formed UTF-8 is only replaced if it is a
+//   logical consequence of the operation (as for Map) or if it otherwise would
+//   pose security concerns (as for Remove).
+// - An alternative would be to return an error on ill-formed UTF-8, but this
+//   would be inconsistent with other operations.
+
+// If returns a transformer that applies tIn to consecutive runes for which
+// s.Contains(r) and tNotIn to consecutive runes for which !s.Contains(r). Reset
+// is called on tIn and tNotIn at the start of each run. A Nop transformer will
+// substitute a nil value passed to tIn or tNotIn. Invalid UTF-8 is translated
+// to RuneError to determine which transformer to apply, but is passed as is to
+// the respective transformer.
+func If(s Set, tIn, tNotIn transform.Transformer) Transformer {
+	if tIn == nil && tNotIn == nil {
+		return Transformer{transform.Nop}
+	}
+	if tIn == nil {
+		tIn = transform.Nop
+	}
+	if tNotIn == nil {
+		tNotIn = transform.Nop
+	}
+	sIn, ok := tIn.(transform.SpanningTransformer)
+	if !ok {
+		sIn = dummySpan{tIn}
+	}
+	sNotIn, ok := tNotIn.(transform.SpanningTransformer)
+	if !ok {
+		sNotIn = dummySpan{tNotIn}
+	}
+
+	a := &cond{
+		tIn:    sIn,
+		tNotIn: sNotIn,
+		f:      s.Contains,
+	}
+	a.Reset()
+	return Transformer{a}
+}
+
+type dummySpan struct{ transform.Transformer }
+
+func (d dummySpan) Span(src []byte, atEOF bool) (n int, err error) {
+	return 0, transform.ErrEndOfSpan
+}
+
+type cond struct {
+	tIn, tNotIn transform.SpanningTransformer
+	f           func(rune) bool
+	check       func(rune) bool               // current check to perform
+	t           transform.SpanningTransformer // current transformer to use
+}
+
+// Reset implements transform.Transformer.
+func (t *cond) Reset() {
+	t.check = t.is
+	t.t = t.tIn
+	t.t.Reset() // notIn will be reset on first usage.
+}
+
+func (t *cond) is(r rune) bool {
+	if t.f(r) {
+		return true
+	}
+	t.check = t.isNot
+	t.t = t.tNotIn
+	t.tNotIn.Reset()
+	return false
+}
+
+func (t *cond) isNot(r rune) bool {
+	if !t.f(r) {
+		return true
+	}
+	t.check = t.is
+	t.t = t.tIn
+	t.tIn.Reset()
+	return false
+}
+
+// This implementation of Span doesn't help all too much, but it needs to be
+// there to satisfy this package's Transformer interface.
+// TODO: there are certainly room for improvements, though. For example, if
+// t.t == transform.Nop (which will a common occurrence) it will save a bundle
+// to special-case that loop.
+func (t *cond) Span(src []byte, atEOF bool) (n int, err error) {
+	p := 0
+	for n < len(src) && err == nil {
+		// Don't process too much at a time as the Spanner that will be
+		// called on this block may terminate early.
+		const maxChunk = 4096
+		max := len(src)
+		if v := n + maxChunk; v < max {
+			max = v
+		}
+		atEnd := false
+		size := 0
+		current := t.t
+		for ; p < max; p += size {
+			r := rune(src[p])
+			if r < utf8.RuneSelf {
+				size = 1
+			} else if r, size = utf8.DecodeRune(src[p:]); size == 1 {
+				if !atEOF && !utf8.FullRune(src[p:]) {
+					err = transform.ErrShortSrc
+					break
+				}
+			}
+			if !t.check(r) {
+				// The next rune will be the start of a new run.
+				atEnd = true
+				break
+			}
+		}
+		n2, err2 := current.Span(src[n:p], atEnd || (atEOF && p == len(src)))
+		n += n2
+		if err2 != nil {
+			return n, err2
+		}
+		// At this point either err != nil or t.check will pass for the rune at p.
+		p = n + size
+	}
+	return n, err
+}
+
+func (t *cond) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	p := 0
+	for nSrc < len(src) && err == nil {
+		// Don't process too much at a time, as the work might be wasted if the
+		// destination buffer isn't large enough to hold the result or a
+		// transform returns an error early.
+		const maxChunk = 4096
+		max := len(src)
+		if n := nSrc + maxChunk; n < len(src) {
+			max = n
+		}
+		atEnd := false
+		size := 0
+		current := t.t
+		for ; p < max; p += size {
+			r := rune(src[p])
+			if r < utf8.RuneSelf {
+				size = 1
+			} else if r, size = utf8.DecodeRune(src[p:]); size == 1 {
+				if !atEOF && !utf8.FullRune(src[p:]) {
+					err = transform.ErrShortSrc
+					break
+				}
+			}
+			if !t.check(r) {
+				// The next rune will be the start of a new run.
+				atEnd = true
+				break
+			}
+		}
+		nDst2, nSrc2, err2 := current.Transform(dst[nDst:], src[nSrc:p], atEnd || (atEOF && p == len(src)))
+		nDst += nDst2
+		nSrc += nSrc2
+		if err2 != nil {
+			return nDst, nSrc, err2
+		}
+		// At this point either err != nil or t.check will pass for the rune at p.
+		p = nSrc + size
+	}
+	return nDst, nSrc, err
+}

vendor/golang.org/x/text/runes/runes.go

@@ -0,0 +1,355 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package runes provide transforms for UTF-8 encoded text.
+package runes // import "golang.org/x/text/runes"
+
+import (
+	"unicode"
+	"unicode/utf8"
+
+	"golang.org/x/text/transform"
+)
+
+// A Set is a collection of runes.
+type Set interface {
+	// Contains returns true if r is contained in the set.
+	Contains(r rune) bool
+}
+
+type setFunc func(rune) bool
+
+func (s setFunc) Contains(r rune) bool {
+	return s(r)
+}
+
+// Note: using funcs here instead of wrapping types result in cleaner
+// documentation and a smaller API.
+
+// In creates a Set with a Contains method that returns true for all runes in
+// the given RangeTable.
+func In(rt *unicode.RangeTable) Set {
+	return setFunc(func(r rune) bool { return unicode.Is(rt, r) })
+}
+
+// In creates a Set with a Contains method that returns true for all runes not
+// in the given RangeTable.
+func NotIn(rt *unicode.RangeTable) Set {
+	return setFunc(func(r rune) bool { return !unicode.Is(rt, r) })
+}
+
+// Predicate creates a Set with a Contains method that returns f(r).
+func Predicate(f func(rune) bool) Set {
+	return setFunc(f)
+}
+
+// Transformer implements the transform.Transformer interface.
+type Transformer struct {
+	t transform.SpanningTransformer
+}
+
+func (t Transformer) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	return t.t.Transform(dst, src, atEOF)
+}
+
+func (t Transformer) Span(b []byte, atEOF bool) (n int, err error) {
+	return t.t.Span(b, atEOF)
+}
+
+func (t Transformer) Reset() { t.t.Reset() }
+
+// Bytes returns a new byte slice with the result of converting b using t.  It
+// calls Reset on t. It returns nil if any error was found. This can only happen
+// if an error-producing Transformer is passed to If.
+func (t Transformer) Bytes(b []byte) []byte {
+	b, _, err := transform.Bytes(t, b)
+	if err != nil {
+		return nil
+	}
+	return b
+}
+
+// String returns a string with the result of converting s using t. It calls
+// Reset on t. It returns the empty string if any error was found. This can only
+// happen if an error-producing Transformer is passed to If.
+func (t Transformer) String(s string) string {
+	s, _, err := transform.String(t, s)
+	if err != nil {
+		return ""
+	}
+	return s
+}
+
+// TODO:
+// - Copy: copying strings and bytes in whole-rune units.
+// - Validation (maybe)
+// - Well-formed-ness (maybe)
+
+const runeErrorString = string(utf8.RuneError)
+
+// Remove returns a Transformer that removes runes r for which s.Contains(r).
+// Illegal input bytes are replaced by RuneError before being passed to f.
+func Remove(s Set) Transformer {
+	if f, ok := s.(setFunc); ok {
+		// This little trick cuts the running time of BenchmarkRemove for sets
+		// created by Predicate roughly in half.
+		// TODO: special-case RangeTables as well.
+		return Transformer{remove(f)}
+	}
+	return Transformer{remove(s.Contains)}
+}
+
+// TODO: remove transform.RemoveFunc.
+
+type remove func(r rune) bool
+
+func (remove) Reset() {}
+
+// Span implements transform.Spanner.
+func (t remove) Span(src []byte, atEOF bool) (n int, err error) {
+	for r, size := rune(0), 0; n < len(src); {
+		if r = rune(src[n]); r < utf8.RuneSelf {
+			size = 1
+		} else if r, size = utf8.DecodeRune(src[n:]); size == 1 {
+			// Invalid rune.
+			if !atEOF && !utf8.FullRune(src[n:]) {
+				err = transform.ErrShortSrc
+			} else {
+				err = transform.ErrEndOfSpan
+			}
+			break
+		}
+		if t(r) {
+			err = transform.ErrEndOfSpan
+			break
+		}
+		n += size
+	}
+	return
+}
+
+// Transform implements transform.Transformer.
+func (t remove) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	for r, size := rune(0), 0; nSrc < len(src); {
+		if r = rune(src[nSrc]); r < utf8.RuneSelf {
+			size = 1
+		} else if r, size = utf8.DecodeRune(src[nSrc:]); size == 1 {
+			// Invalid rune.
+			if !atEOF && !utf8.FullRune(src[nSrc:]) {
+				err = transform.ErrShortSrc
+				break
+			}
+			// We replace illegal bytes with RuneError. Not doing so might
+			// otherwise turn a sequence of invalid UTF-8 into valid UTF-8.
+			// The resulting byte sequence may subsequently contain runes
+			// for which t(r) is true that were passed unnoticed.
+			if !t(utf8.RuneError) {
+				if nDst+3 > len(dst) {
+					err = transform.ErrShortDst
+					break
+				}
+				dst[nDst+0] = runeErrorString[0]
+				dst[nDst+1] = runeErrorString[1]
+				dst[nDst+2] = runeErrorString[2]
+				nDst += 3
+			}
+			nSrc++
+			continue
+		}
+		if t(r) {
+			nSrc += size
+			continue
+		}
+		if nDst+size > len(dst) {
+			err = transform.ErrShortDst
+			break
+		}
+		for i := 0; i < size; i++ {
+			dst[nDst] = src[nSrc]
+			nDst++
+			nSrc++
+		}
+	}
+	return
+}
+
+// Map returns a Transformer that maps the runes in the input using the given
+// mapping. Illegal bytes in the input are converted to utf8.RuneError before
+// being passed to the mapping func.
+func Map(mapping func(rune) rune) Transformer {
+	return Transformer{mapper(mapping)}
+}
+
+type mapper func(rune) rune
+
+func (mapper) Reset() {}
+
+// Span implements transform.Spanner.
+func (t mapper) Span(src []byte, atEOF bool) (n int, err error) {
+	for r, size := rune(0), 0; n < len(src); n += size {
+		if r = rune(src[n]); r < utf8.RuneSelf {
+			size = 1
+		} else if r, size = utf8.DecodeRune(src[n:]); size == 1 {
+			// Invalid rune.
+			if !atEOF && !utf8.FullRune(src[n:]) {
+				err = transform.ErrShortSrc
+			} else {
+				err = transform.ErrEndOfSpan
+			}
+			break
+		}
+		if t(r) != r {
+			err = transform.ErrEndOfSpan
+			break
+		}
+	}
+	return n, err
+}
+
+// Transform implements transform.Transformer.
+func (t mapper) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	var replacement rune
+	var b [utf8.UTFMax]byte
+
+	for r, size := rune(0), 0; nSrc < len(src); {
+		if r = rune(src[nSrc]); r < utf8.RuneSelf {
+			if replacement = t(r); replacement < utf8.RuneSelf {
+				if nDst == len(dst) {
+					err = transform.ErrShortDst
+					break
+				}
+				dst[nDst] = byte(replacement)
+				nDst++
+				nSrc++
+				continue
+			}
+			size = 1
+		} else if r, size = utf8.DecodeRune(src[nSrc:]); size == 1 {
+			// Invalid rune.
+			if !atEOF && !utf8.FullRune(src[nSrc:]) {
+				err = transform.ErrShortSrc
+				break
+			}
+
+			if replacement = t(utf8.RuneError); replacement == utf8.RuneError {
+				if nDst+3 > len(dst) {
+					err = transform.ErrShortDst
+					break
+				}
+				dst[nDst+0] = runeErrorString[0]
+				dst[nDst+1] = runeErrorString[1]
+				dst[nDst+2] = runeErrorString[2]
+				nDst += 3
+				nSrc++
+				continue
+			}
+		} else if replacement = t(r); replacement == r {
+			if nDst+size > len(dst) {
+				err = transform.ErrShortDst
+				break
+			}
+			for i := 0; i < size; i++ {
+				dst[nDst] = src[nSrc]
+				nDst++
+				nSrc++
+			}
+			continue
+		}
+
+		n := utf8.EncodeRune(b[:], replacement)
+
+		if nDst+n > len(dst) {
+			err = transform.ErrShortDst
+			break
+		}
+		for i := 0; i < n; i++ {
+			dst[nDst] = b[i]
+			nDst++
+		}
+		nSrc += size
+	}
+	return
+}
+
+// ReplaceIllFormed returns a transformer that replaces all input bytes that are
+// not part of a well-formed UTF-8 code sequence with utf8.RuneError.
+func ReplaceIllFormed() Transformer {
+	return Transformer{&replaceIllFormed{}}
+}
+
+type replaceIllFormed struct{ transform.NopResetter }
+
+func (t replaceIllFormed) Span(src []byte, atEOF bool) (n int, err error) {
+	for n < len(src) {
+		// ASCII fast path.
+		if src[n] < utf8.RuneSelf {
+			n++
+			continue
+		}
+
+		r, size := utf8.DecodeRune(src[n:])
+
+		// Look for a valid non-ASCII rune.
+		if r != utf8.RuneError || size != 1 {
+			n += size
+			continue
+		}
+
+		// Look for short source data.
+		if !atEOF && !utf8.FullRune(src[n:]) {
+			err = transform.ErrShortSrc
+			break
+		}
+
+		// We have an invalid rune.
+		err = transform.ErrEndOfSpan
+		break
+	}
+	return n, err
+}
+
+func (t replaceIllFormed) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	for nSrc < len(src) {
+		// ASCII fast path.
+		if r := src[nSrc]; r < utf8.RuneSelf {
+			if nDst == len(dst) {
+				err = transform.ErrShortDst
+				break
+			}
+			dst[nDst] = r
+			nDst++
+			nSrc++
+			continue
+		}
+
+		// Look for a valid non-ASCII rune.
+		if _, size := utf8.DecodeRune(src[nSrc:]); size != 1 {
+			if size != copy(dst[nDst:], src[nSrc:nSrc+size]) {
+				err = transform.ErrShortDst
+				break
+			}
+			nDst += size
+			nSrc += size
+			continue
+		}
+
+		// Look for short source data.
+		if !atEOF && !utf8.FullRune(src[nSrc:]) {
+			err = transform.ErrShortSrc
+			break
+		}
+
+		// We have an invalid rune.
+		if nDst+3 > len(dst) {
+			err = transform.ErrShortDst
+			break
+		}
+		dst[nDst+0] = runeErrorString[0]
+		dst[nDst+1] = runeErrorString[1]
+		dst[nDst+2] = runeErrorString[2]
+		nDst += 3
+		nSrc++
+	}
+	return nDst, nSrc, err
+}

vendor/golang.org/x/text/transform/transform.go

@@ -0,0 +1,705 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package transform provides reader and writer wrappers that transform the
+// bytes passing through as well as various transformations. Example
+// transformations provided by other packages include normalization and
+// conversion between character sets.
+package transform // import "golang.org/x/text/transform"
+
+import (
+	"bytes"
+	"errors"
+	"io"
+	"unicode/utf8"
+)
+
+var (
+	// ErrShortDst means that the destination buffer was too short to
+	// receive all of the transformed bytes.
+	ErrShortDst = errors.New("transform: short destination buffer")
+
+	// ErrShortSrc means that the source buffer has insufficient data to
+	// complete the transformation.
+	ErrShortSrc = errors.New("transform: short source buffer")
+
+	// ErrEndOfSpan means that the input and output (the transformed input)
+	// are not identical.
+	ErrEndOfSpan = errors.New("transform: input and output are not identical")
+
+	// errInconsistentByteCount means that Transform returned success (nil
+	// error) but also returned nSrc inconsistent with the src argument.
+	errInconsistentByteCount = errors.New("transform: inconsistent byte count returned")
+
+	// errShortInternal means that an internal buffer is not large enough
+	// to make progress and the Transform operation must be aborted.
+	errShortInternal = errors.New("transform: short internal buffer")
+)
+
+// Transformer transforms bytes.
+type Transformer interface {
+	// Transform writes to dst the transformed bytes read from src, and
+	// returns the number of dst bytes written and src bytes read. The
+	// atEOF argument tells whether src represents the last bytes of the
+	// input.
+	//
+	// Callers should always process the nDst bytes produced and account
+	// for the nSrc bytes consumed before considering the error err.
+	//
+	// A nil error means that all of the transformed bytes (whether freshly
+	// transformed from src or left over from previous Transform calls)
+	// were written to dst. A nil error can be returned regardless of
+	// whether atEOF is true. If err is nil then nSrc must equal len(src);
+	// the converse is not necessarily true.
+	//
+	// ErrShortDst means that dst was too short to receive all of the
+	// transformed bytes. ErrShortSrc means that src had insufficient data
+	// to complete the transformation. If both conditions apply, then
+	// either error may be returned. Other than the error conditions listed
+	// here, implementations are free to report other errors that arise.
+	Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error)
+
+	// Reset resets the state and allows a Transformer to be reused.
+	Reset()
+}
+
+// SpanningTransformer extends the Transformer interface with a Span method
+// that determines how much of the input already conforms to the Transformer.
+type SpanningTransformer interface {
+	Transformer
+
+	// Span returns a position in src such that transforming src[:n] results in
+	// identical output src[:n] for these bytes. It does not necessarily return
+	// the largest such n. The atEOF argument tells whether src represents the
+	// last bytes of the input.
+	//
+	// Callers should always account for the n bytes consumed before
+	// considering the error err.
+	//
+	// A nil error means that all input bytes are known to be identical to the
+	// output produced by the Transformer. A nil error can be be returned
+	// regardless of whether atEOF is true. If err is nil, then then n must
+	// equal len(src); the converse is not necessarily true.
+	//
+	// ErrEndOfSpan means that the Transformer output may differ from the
+	// input after n bytes. Note that n may be len(src), meaning that the output
+	// would contain additional bytes after otherwise identical output.
+	// ErrShortSrc means that src had insufficient data to determine whether the
+	// remaining bytes would change. Other than the error conditions listed
+	// here, implementations are free to report other errors that arise.
+	//
+	// Calling Span can modify the Transformer state as a side effect. In
+	// effect, it does the transformation just as calling Transform would, only
+	// without copying to a destination buffer and only up to a point it can
+	// determine the input and output bytes are the same. This is obviously more
+	// limited than calling Transform, but can be more efficient in terms of
+	// copying and allocating buffers. Calls to Span and Transform may be
+	// interleaved.
+	Span(src []byte, atEOF bool) (n int, err error)
+}
+
+// NopResetter can be embedded by implementations of Transformer to add a nop
+// Reset method.
+type NopResetter struct{}
+
+// Reset implements the Reset method of the Transformer interface.
+func (NopResetter) Reset() {}
+
+// Reader wraps another io.Reader by transforming the bytes read.
+type Reader struct {
+	r   io.Reader
+	t   Transformer
+	err error
+
+	// dst[dst0:dst1] contains bytes that have been transformed by t but
+	// not yet copied out via Read.
+	dst        []byte
+	dst0, dst1 int
+
+	// src[src0:src1] contains bytes that have been read from r but not
+	// yet transformed through t.
+	src        []byte
+	src0, src1 int
+
+	// transformComplete is whether the transformation is complete,
+	// regardless of whether or not it was successful.
+	transformComplete bool
+}
+
+const defaultBufSize = 4096
+
+// NewReader returns a new Reader that wraps r by transforming the bytes read
+// via t. It calls Reset on t.
+func NewReader(r io.Reader, t Transformer) *Reader {
+	t.Reset()
+	return &Reader{
+		r:   r,
+		t:   t,
+		dst: make([]byte, defaultBufSize),
+		src: make([]byte, defaultBufSize),
+	}
+}
+
+// Read implements the io.Reader interface.
+func (r *Reader) Read(p []byte) (int, error) {
+	n, err := 0, error(nil)
+	for {
+		// Copy out any transformed bytes and return the final error if we are done.
+		if r.dst0 != r.dst1 {
+			n = copy(p, r.dst[r.dst0:r.dst1])
+			r.dst0 += n
+			if r.dst0 == r.dst1 && r.transformComplete {
+				return n, r.err
+			}
+			return n, nil
+		} else if r.transformComplete {
+			return 0, r.err
+		}
+
+		// Try to transform some source bytes, or to flush the transformer if we
+		// are out of source bytes. We do this even if r.r.Read returned an error.
+		// As the io.Reader documentation says, "process the n > 0 bytes returned
+		// before considering the error".
+		if r.src0 != r.src1 || r.err != nil {
+			r.dst0 = 0
+			r.dst1, n, err = r.t.Transform(r.dst, r.src[r.src0:r.src1], r.err == io.EOF)
+			r.src0 += n
+
+			switch {
+			case err == nil:
+				if r.src0 != r.src1 {
+					r.err = errInconsistentByteCount
+				}
+				// The Transform call was successful; we are complete if we
+				// cannot read more bytes into src.
+				r.transformComplete = r.err != nil
+				continue
+			case err == ErrShortDst && (r.dst1 != 0 || n != 0):
+				// Make room in dst by copying out, and try again.
+				continue
+			case err == ErrShortSrc && r.src1-r.src0 != len(r.src) && r.err == nil:
+				// Read more bytes into src via the code below, and try again.
+			default:
+				r.transformComplete = true
+				// The reader error (r.err) takes precedence over the
+				// transformer error (err) unless r.err is nil or io.EOF.
+				if r.err == nil || r.err == io.EOF {
+					r.err = err
+				}
+				continue
+			}
+		}
+
+		// Move any untransformed source bytes to the start of the buffer
+		// and read more bytes.
+		if r.src0 != 0 {
+			r.src0, r.src1 = 0, copy(r.src, r.src[r.src0:r.src1])
+		}
+		n, r.err = r.r.Read(r.src[r.src1:])
+		r.src1 += n
+	}
+}
+
+// TODO: implement ReadByte (and ReadRune??).
+
+// Writer wraps another io.Writer by transforming the bytes read.
+// The user needs to call Close to flush unwritten bytes that may
+// be buffered.
+type Writer struct {
+	w   io.Writer
+	t   Transformer
+	dst []byte
+
+	// src[:n] contains bytes that have not yet passed through t.
+	src []byte
+	n   int
+}
+
+// NewWriter returns a new Writer that wraps w by transforming the bytes written
+// via t. It calls Reset on t.
+func NewWriter(w io.Writer, t Transformer) *Writer {
+	t.Reset()
+	return &Writer{
+		w:   w,
+		t:   t,
+		dst: make([]byte, defaultBufSize),
+		src: make([]byte, defaultBufSize),
+	}
+}
+
+// Write implements the io.Writer interface. If there are not enough
+// bytes available to complete a Transform, the bytes will be buffered
+// for the next write. Call Close to convert the remaining bytes.
+func (w *Writer) Write(data []byte) (n int, err error) {
+	src := data
+	if w.n > 0 {
+		// Append bytes from data to the last remainder.
+		// TODO: limit the amount copied on first try.
+		n = copy(w.src[w.n:], data)
+		w.n += n
+		src = w.src[:w.n]
+	}
+	for {
+		nDst, nSrc, err := w.t.Transform(w.dst, src, false)
+		if _, werr := w.w.Write(w.dst[:nDst]); werr != nil {
+			return n, werr
+		}
+		src = src[nSrc:]
+		if w.n == 0 {
+			n += nSrc
+		} else if len(src) <= n {
+			// Enough bytes from w.src have been consumed. We make src point
+			// to data instead to reduce the copying.
+			w.n = 0
+			n -= len(src)
+			src = data[n:]
+			if n < len(data) && (err == nil || err == ErrShortSrc) {
+				continue
+			}
+		}
+		switch err {
+		case ErrShortDst:
+			// This error is okay as long as we are making progress.
+			if nDst > 0 || nSrc > 0 {
+				continue
+			}
+		case ErrShortSrc:
+			if len(src) < len(w.src) {
+				m := copy(w.src, src)
+				// If w.n > 0, bytes from data were already copied to w.src and n
+				// was already set to the number of bytes consumed.
+				if w.n == 0 {
+					n += m
+				}
+				w.n = m
+				err = nil
+			} else if nDst > 0 || nSrc > 0 {
+				// Not enough buffer to store the remainder. Keep processing as
+				// long as there is progress. Without this case, transforms that
+				// require a lookahead larger than the buffer may result in an
+				// error. This is not something one may expect to be common in
+				// practice, but it may occur when buffers are set to small
+				// sizes during testing.
+				continue
+			}
+		case nil:
+			if w.n > 0 {
+				err = errInconsistentByteCount
+			}
+		}
+		return n, err
+	}
+}
+
+// Close implements the io.Closer interface.
+func (w *Writer) Close() error {
+	src := w.src[:w.n]
+	for {
+		nDst, nSrc, err := w.t.Transform(w.dst, src, true)
+		if _, werr := w.w.Write(w.dst[:nDst]); werr != nil {
+			return werr
+		}
+		if err != ErrShortDst {
+			return err
+		}
+		src = src[nSrc:]
+	}
+}
+
+type nop struct{ NopResetter }
+
+func (nop) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	n := copy(dst, src)
+	if n < len(src) {
+		err = ErrShortDst
+	}
+	return n, n, err
+}
+
+func (nop) Span(src []byte, atEOF bool) (n int, err error) {
+	return len(src), nil
+}
+
+type discard struct{ NopResetter }
+
+func (discard) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	return 0, len(src), nil
+}
+
+var (
+	// Discard is a Transformer for which all Transform calls succeed
+	// by consuming all bytes and writing nothing.
+	Discard Transformer = discard{}
+
+	// Nop is a SpanningTransformer that copies src to dst.
+	Nop SpanningTransformer = nop{}
+)
+
+// chain is a sequence of links. A chain with N Transformers has N+1 links and
+// N+1 buffers. Of those N+1 buffers, the first and last are the src and dst
+// buffers given to chain.Transform and the middle N-1 buffers are intermediate
+// buffers owned by the chain. The i'th link transforms bytes from the i'th
+// buffer chain.link[i].b at read offset chain.link[i].p to the i+1'th buffer
+// chain.link[i+1].b at write offset chain.link[i+1].n, for i in [0, N).
+type chain struct {
+	link []link
+	err  error
+	// errStart is the index at which the error occurred plus 1. Processing
+	// errStart at this level at the next call to Transform. As long as
+	// errStart > 0, chain will not consume any more source bytes.
+	errStart int
+}
+
+func (c *chain) fatalError(errIndex int, err error) {
+	if i := errIndex + 1; i > c.errStart {
+		c.errStart = i
+		c.err = err
+	}
+}
+
+type link struct {
+	t Transformer
+	// b[p:n] holds the bytes to be transformed by t.
+	b []byte
+	p int
+	n int
+}
+
+func (l *link) src() []byte {
+	return l.b[l.p:l.n]
+}
+
+func (l *link) dst() []byte {
+	return l.b[l.n:]
+}
+
+// Chain returns a Transformer that applies t in sequence.
+func Chain(t ...Transformer) Transformer {
+	if len(t) == 0 {
+		return nop{}
+	}
+	c := &chain{link: make([]link, len(t)+1)}
+	for i, tt := range t {
+		c.link[i].t = tt
+	}
+	// Allocate intermediate buffers.
+	b := make([][defaultBufSize]byte, len(t)-1)
+	for i := range b {
+		c.link[i+1].b = b[i][:]
+	}
+	return c
+}
+
+// Reset resets the state of Chain. It calls Reset on all the Transformers.
+func (c *chain) Reset() {
+	for i, l := range c.link {
+		if l.t != nil {
+			l.t.Reset()
+		}
+		c.link[i].p, c.link[i].n = 0, 0
+	}
+}
+
+// TODO: make chain use Span (is going to be fun to implement!)
+
+// Transform applies the transformers of c in sequence.
+func (c *chain) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	// Set up src and dst in the chain.
+	srcL := &c.link[0]
+	dstL := &c.link[len(c.link)-1]
+	srcL.b, srcL.p, srcL.n = src, 0, len(src)
+	dstL.b, dstL.n = dst, 0
+	var lastFull, needProgress bool // for detecting progress
+
+	// i is the index of the next Transformer to apply, for i in [low, high].
+	// low is the lowest index for which c.link[low] may still produce bytes.
+	// high is the highest index for which c.link[high] has a Transformer.
+	// The error returned by Transform determines whether to increase or
+	// decrease i. We try to completely fill a buffer before converting it.
+	for low, i, high := c.errStart, c.errStart, len(c.link)-2; low <= i && i <= high; {
+		in, out := &c.link[i], &c.link[i+1]
+		nDst, nSrc, err0 := in.t.Transform(out.dst(), in.src(), atEOF && low == i)
+		out.n += nDst
+		in.p += nSrc
+		if i > 0 && in.p == in.n {
+			in.p, in.n = 0, 0
+		}
+		needProgress, lastFull = lastFull, false
+		switch err0 {
+		case ErrShortDst:
+			// Process the destination buffer next. Return if we are already
+			// at the high index.
+			if i == high {
+				return dstL.n, srcL.p, ErrShortDst
+			}
+			if out.n != 0 {
+				i++
+				// If the Transformer at the next index is not able to process any
+				// source bytes there is nothing that can be done to make progress
+				// and the bytes will remain unprocessed. lastFull is used to
+				// detect this and break out of the loop with a fatal error.
+				lastFull = true
+				continue
+			}
+			// The destination buffer was too small, but is completely empty.
+			// Return a fatal error as this transformation can never complete.
+			c.fatalError(i, errShortInternal)
+		case ErrShortSrc:
+			if i == 0 {
+				// Save ErrShortSrc in err. All other errors take precedence.
+				err = ErrShortSrc
+				break
+			}
+			// Source bytes were depleted before filling up the destination buffer.
+			// Verify we made some progress, move the remaining bytes to the errStart
+			// and try to get more source bytes.
+			if needProgress && nSrc == 0 || in.n-in.p == len(in.b) {
+				// There were not enough source bytes to proceed while the source
+				// buffer cannot hold any more bytes. Return a fatal error as this
+				// transformation can never complete.
+				c.fatalError(i, errShortInternal)
+				break
+			}
+			// in.b is an internal buffer and we can make progress.
+			in.p, in.n = 0, copy(in.b, in.src())
+			fallthrough
+		case nil:
+			// if i == low, we have depleted the bytes at index i or any lower levels.
+			// In that case we increase low and i. In all other cases we decrease i to
+			// fetch more bytes before proceeding to the next index.
+			if i > low {
+				i--
+				continue
+			}
+		default:
+			c.fatalError(i, err0)
+		}
+		// Exhausted level low or fatal error: increase low and continue
+		// to process the bytes accepted so far.
+		i++
+		low = i
+	}
+
+	// If c.errStart > 0, this means we found a fatal error.  We will clear
+	// all upstream buffers. At this point, no more progress can be made
+	// downstream, as Transform would have bailed while handling ErrShortDst.
+	if c.errStart > 0 {
+		for i := 1; i < c.errStart; i++ {
+			c.link[i].p, c.link[i].n = 0, 0
+		}
+		err, c.errStart, c.err = c.err, 0, nil
+	}
+	return dstL.n, srcL.p, err
+}
+
+// Deprecated: use runes.Remove instead.
+func RemoveFunc(f func(r rune) bool) Transformer {
+	return removeF(f)
+}
+
+type removeF func(r rune) bool
+
+func (removeF) Reset() {}
+
+// Transform implements the Transformer interface.
+func (t removeF) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	for r, sz := rune(0), 0; len(src) > 0; src = src[sz:] {
+
+		if r = rune(src[0]); r < utf8.RuneSelf {
+			sz = 1
+		} else {
+			r, sz = utf8.DecodeRune(src)
+
+			if sz == 1 {
+				// Invalid rune.
+				if !atEOF && !utf8.FullRune(src) {
+					err = ErrShortSrc
+					break
+				}
+				// We replace illegal bytes with RuneError. Not doing so might
+				// otherwise turn a sequence of invalid UTF-8 into valid UTF-8.
+				// The resulting byte sequence may subsequently contain runes
+				// for which t(r) is true that were passed unnoticed.
+				if !t(r) {
+					if nDst+3 > len(dst) {
+						err = ErrShortDst
+						break
+					}
+					nDst += copy(dst[nDst:], "\uFFFD")
+				}
+				nSrc++
+				continue
+			}
+		}
+
+		if !t(r) {
+			if nDst+sz > len(dst) {
+				err = ErrShortDst
+				break
+			}
+			nDst += copy(dst[nDst:], src[:sz])
+		}
+		nSrc += sz
+	}
+	return
+}
+
+// grow returns a new []byte that is longer than b, and copies the first n bytes
+// of b to the start of the new slice.
+func grow(b []byte, n int) []byte {
+	m := len(b)
+	if m <= 32 {
+		m = 64
+	} else if m <= 256 {
+		m *= 2
+	} else {
+		m += m >> 1
+	}
+	buf := make([]byte, m)
+	copy(buf, b[:n])
+	return buf
+}
+
+const initialBufSize = 128
+
+// String returns a string with the result of converting s[:n] using t, where
+// n <= len(s). If err == nil, n will be len(s). It calls Reset on t.
+func String(t Transformer, s string) (result string, n int, err error) {
+	t.Reset()
+	if s == "" {
+		// Fast path for the common case for empty input. Results in about a
+		// 86% reduction of running time for BenchmarkStringLowerEmpty.
+		if _, _, err := t.Transform(nil, nil, true); err == nil {
+			return "", 0, nil
+		}
+	}
+
+	// Allocate only once. Note that both dst and src escape when passed to
+	// Transform.
+	buf := [2 * initialBufSize]byte{}
+	dst := buf[:initialBufSize:initialBufSize]
+	src := buf[initialBufSize : 2*initialBufSize]
+
+	// The input string s is transformed in multiple chunks (starting with a
+	// chunk size of initialBufSize). nDst and nSrc are per-chunk (or
+	// per-Transform-call) indexes, pDst and pSrc are overall indexes.
+	nDst, nSrc := 0, 0
+	pDst, pSrc := 0, 0
+
+	// pPrefix is the length of a common prefix: the first pPrefix bytes of the
+	// result will equal the first pPrefix bytes of s. It is not guaranteed to
+	// be the largest such value, but if pPrefix, len(result) and len(s) are
+	// all equal after the final transform (i.e. calling Transform with atEOF
+	// being true returned nil error) then we don't need to allocate a new
+	// result string.
+	pPrefix := 0
+	for {
+		// Invariant: pDst == pPrefix && pSrc == pPrefix.
+
+		n := copy(src, s[pSrc:])
+		nDst, nSrc, err = t.Transform(dst, src[:n], pSrc+n == len(s))
+		pDst += nDst
+		pSrc += nSrc
+
+		// TODO:  let transformers implement an optional Spanner interface, akin
+		// to norm's QuickSpan. This would even allow us to avoid any allocation.
+		if !bytes.Equal(dst[:nDst], src[:nSrc]) {
+			break
+		}
+		pPrefix = pSrc
+		if err == ErrShortDst {
+			// A buffer can only be short if a transformer modifies its input.
+			break
+		} else if err == ErrShortSrc {
+			if nSrc == 0 {
+				// No progress was made.
+				break
+			}
+			// Equal so far and !atEOF, so continue checking.
+		} else if err != nil || pPrefix == len(s) {
+			return string(s[:pPrefix]), pPrefix, err
+		}
+	}
+	// Post-condition: pDst == pPrefix + nDst && pSrc == pPrefix + nSrc.
+
+	// We have transformed the first pSrc bytes of the input s to become pDst
+	// transformed bytes. Those transformed bytes are discontiguous: the first
+	// pPrefix of them equal s[:pPrefix] and the last nDst of them equal
+	// dst[:nDst]. We copy them around, into a new dst buffer if necessary, so
+	// that they become one contiguous slice: dst[:pDst].
+	if pPrefix != 0 {
+		newDst := dst
+		if pDst > len(newDst) {
+			newDst = make([]byte, len(s)+nDst-nSrc)
+		}
+		copy(newDst[pPrefix:pDst], dst[:nDst])
+		copy(newDst[:pPrefix], s[:pPrefix])
+		dst = newDst
+	}
+
+	// Prevent duplicate Transform calls with atEOF being true at the end of
+	// the input. Also return if we have an unrecoverable error.
+	if (err == nil && pSrc == len(s)) ||
+		(err != nil && err != ErrShortDst && err != ErrShortSrc) {
+		return string(dst[:pDst]), pSrc, err
+	}
+
+	// Transform the remaining input, growing dst and src buffers as necessary.
+	for {
+		n := copy(src, s[pSrc:])
+		nDst, nSrc, err := t.Transform(dst[pDst:], src[:n], pSrc+n == len(s))
+		pDst += nDst
+		pSrc += nSrc
+
+		// If we got ErrShortDst or ErrShortSrc, do not grow as long as we can
+		// make progress. This may avoid excessive allocations.
+		if err == ErrShortDst {
+			if nDst == 0 {
+				dst = grow(dst, pDst)
+			}
+		} else if err == ErrShortSrc {
+			if nSrc == 0 {
+				src = grow(src, 0)
+			}
+		} else if err != nil || pSrc == len(s) {
+			return string(dst[:pDst]), pSrc, err
+		}
+	}
+}
+
+// Bytes returns a new byte slice with the result of converting b[:n] using t,
+// where n <= len(b). If err == nil, n will be len(b). It calls Reset on t.
+func Bytes(t Transformer, b []byte) (result []byte, n int, err error) {
+	return doAppend(t, 0, make([]byte, len(b)), b)
+}
+
+// Append appends the result of converting src[:n] using t to dst, where
+// n <= len(src), If err == nil, n will be len(src). It calls Reset on t.
+func Append(t Transformer, dst, src []byte) (result []byte, n int, err error) {
+	if len(dst) == cap(dst) {
+		n := len(src) + len(dst) // It is okay for this to be 0.
+		b := make([]byte, n)
+		dst = b[:copy(b, dst)]
+	}
+	return doAppend(t, len(dst), dst[:cap(dst)], src)
+}
+
+func doAppend(t Transformer, pDst int, dst, src []byte) (result []byte, n int, err error) {
+	t.Reset()
+	pSrc := 0
+	for {
+		nDst, nSrc, err := t.Transform(dst[pDst:], src[pSrc:], true)
+		pDst += nDst
+		pSrc += nSrc
+		if err != ErrShortDst {
+			return dst[:pDst], pSrc, err
+		}
+
+		// Grow the destination buffer, but do not grow as long as we can make
+		// progress. This may avoid excessive allocations.
+		if nDst == 0 {
+			dst = grow(dst, pDst)
+		}
+	}
+}

vendor/golang.org/x/text/unicode/cldr/base.go

@@ -0,0 +1,100 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cldr
+
+import (
+	"encoding/xml"
+	"regexp"
+	"strconv"
+)
+
+// Elem is implemented by every XML element.
+type Elem interface {
+	setEnclosing(Elem)
+	setName(string)
+	enclosing() Elem
+
+	GetCommon() *Common
+}
+
+type hidden struct {
+	CharData string `xml:",chardata"`
+	Alias    *struct {
+		Common
+		Source string `xml:"source,attr"`
+		Path   string `xml:"path,attr"`
+	} `xml:"alias"`
+	Def *struct {
+		Common
+		Choice string `xml:"choice,attr,omitempty"`
+		Type   string `xml:"type,attr,omitempty"`
+	} `xml:"default"`
+}
+
+// Common holds several of the most common attributes and sub elements
+// of an XML element.
+type Common struct {
+	XMLName         xml.Name
+	name            string
+	enclElem        Elem
+	Type            string `xml:"type,attr,omitempty"`
+	Reference       string `xml:"reference,attr,omitempty"`
+	Alt             string `xml:"alt,attr,omitempty"`
+	ValidSubLocales string `xml:"validSubLocales,attr,omitempty"`
+	Draft           string `xml:"draft,attr,omitempty"`
+	hidden
+}
+
+// Default returns the default type to select from the enclosed list
+// or "" if no default value is specified.
+func (e *Common) Default() string {
+	if e.Def == nil {
+		return ""
+	}
+	if e.Def.Choice != "" {
+		return e.Def.Choice
+	} else if e.Def.Type != "" {
+		// Type is still used by the default element in collation.
+		return e.Def.Type
+	}
+	return ""
+}
+
+// GetCommon returns e. It is provided such that Common implements Elem.
+func (e *Common) GetCommon() *Common {
+	return e
+}
+
+// Data returns the character data accumulated for this element.
+func (e *Common) Data() string {
+	e.CharData = charRe.ReplaceAllStringFunc(e.CharData, replaceUnicode)
+	return e.CharData
+}
+
+func (e *Common) setName(s string) {
+	e.name = s
+}
+
+func (e *Common) enclosing() Elem {
+	return e.enclElem
+}
+
+func (e *Common) setEnclosing(en Elem) {
+	e.enclElem = en
+}
+
+// Escape characters that can be escaped without further escaping the string.
+var charRe = regexp.MustCompile(`&#x[0-9a-fA-F]*;|\\u[0-9a-fA-F]{4}|\\U[0-9a-fA-F]{8}|\\x[0-9a-fA-F]{2}|\\[0-7]{3}|\\[abtnvfr]`)
+
+// replaceUnicode converts hexadecimal Unicode codepoint notations to a one-rune string.
+// It assumes the input string is correctly formatted.
+func replaceUnicode(s string) string {
+	if s[1] == '#' {
+		r, _ := strconv.ParseInt(s[3:len(s)-1], 16, 32)
+		return string(r)
+	}
+	r, _, _, _ := strconv.UnquoteChar(s, 0)
+	return string(r)
+}

vendor/golang.org/x/text/unicode/cldr/cldr.go

@@ -0,0 +1,130 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:generate go run makexml.go -output xml.go
+
+// Package cldr provides a parser for LDML and related XML formats.
+// This package is intended to be used by the table generation tools
+// for the various internationalization-related packages.
+// As the XML types are generated from the CLDR DTD, and as the CLDR standard
+// is periodically amended, this package may change considerably over time.
+// This mostly means that data may appear and disappear between versions.
+// That is, old code should keep compiling for newer versions, but data
+// may have moved or changed.
+// CLDR version 22 is the first version supported by this package.
+// Older versions may not work.
+package cldr // import "golang.org/x/text/unicode/cldr"
+
+import (
+	"fmt"
+	"sort"
+)
+
+// CLDR provides access to parsed data of the Unicode Common Locale Data Repository.
+type CLDR struct {
+	parent   map[string][]string
+	locale   map[string]*LDML
+	resolved map[string]*LDML
+	bcp47    *LDMLBCP47
+	supp     *SupplementalData
+}
+
+func makeCLDR() *CLDR {
+	return &CLDR{
+		parent:   make(map[string][]string),
+		locale:   make(map[string]*LDML),
+		resolved: make(map[string]*LDML),
+		bcp47:    &LDMLBCP47{},
+		supp:     &SupplementalData{},
+	}
+}
+
+// BCP47 returns the parsed BCP47 LDML data. If no such data was parsed, nil is returned.
+func (cldr *CLDR) BCP47() *LDMLBCP47 {
+	return nil
+}
+
+// Draft indicates the draft level of an element.
+type Draft int
+
+const (
+	Approved Draft = iota
+	Contributed
+	Provisional
+	Unconfirmed
+)
+
+var drafts = []string{"unconfirmed", "provisional", "contributed", "approved", ""}
+
+// ParseDraft returns the Draft value corresponding to the given string. The
+// empty string corresponds to Approved.
+func ParseDraft(level string) (Draft, error) {
+	if level == "" {
+		return Approved, nil
+	}
+	for i, s := range drafts {
+		if level == s {
+			return Unconfirmed - Draft(i), nil
+		}
+	}
+	return Approved, fmt.Errorf("cldr: unknown draft level %q", level)
+}
+
+func (d Draft) String() string {
+	return drafts[len(drafts)-1-int(d)]
+}
+
+// SetDraftLevel sets which draft levels to include in the evaluated LDML.
+// Any draft element for which the draft level is higher than lev will be excluded.
+// If multiple draft levels are available for a single element, the one with the
+// lowest draft level will be selected, unless preferDraft is true, in which case
+// the highest draft will be chosen.
+// It is assumed that the underlying LDML is canonicalized.
+func (cldr *CLDR) SetDraftLevel(lev Draft, preferDraft bool) {
+	// TODO: implement
+	cldr.resolved = make(map[string]*LDML)
+}
+
+// RawLDML returns the LDML XML for id in unresolved form.
+// id must be one of the strings returned by Locales.
+func (cldr *CLDR) RawLDML(loc string) *LDML {
+	return cldr.locale[loc]
+}
+
+// LDML returns the fully resolved LDML XML for loc, which must be one of
+// the strings returned by Locales.
+func (cldr *CLDR) LDML(loc string) (*LDML, error) {
+	return cldr.resolve(loc)
+}
+
+// Supplemental returns the parsed supplemental data. If no such data was parsed,
+// nil is returned.
+func (cldr *CLDR) Supplemental() *SupplementalData {
+	return cldr.supp
+}
+
+// Locales returns the locales for which there exist files.
+// Valid sublocales for which there is no file are not included.
+// The root locale is always sorted first.
+func (cldr *CLDR) Locales() []string {
+	loc := []string{"root"}
+	hasRoot := false
+	for l, _ := range cldr.locale {
+		if l == "root" {
+			hasRoot = true
+			continue
+		}
+		loc = append(loc, l)
+	}
+	sort.Strings(loc[1:])
+	if !hasRoot {
+		return loc[1:]
+	}
+	return loc
+}
+
+// Get fills in the fields of x based on the XPath path.
+func Get(e Elem, path string) (res Elem, err error) {
+	return walkXPath(e, path)
+}

vendor/golang.org/x/text/unicode/cldr/collate.go

@@ -0,0 +1,359 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cldr
+
+import (
+	"bufio"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"strconv"
+	"strings"
+	"unicode"
+	"unicode/utf8"
+)
+
+// RuleProcessor can be passed to Collator's Process method, which
+// parses the rules and calls the respective method for each rule found.
+type RuleProcessor interface {
+	Reset(anchor string, before int) error
+	Insert(level int, str, context, extend string) error
+	Index(id string)
+}
+
+const (
+	// cldrIndex is a Unicode-reserved sentinel value used to mark the start
+	// of a grouping within an index.
+	// We ignore any rule that starts with this rune.
+	// See http://unicode.org/reports/tr35/#Collation_Elements for details.
+	cldrIndex = "\uFDD0"
+
+	// specialAnchor is the format in which to represent logical reset positions,
+	// such as "first tertiary ignorable".
+	specialAnchor = "<%s/>"
+)
+
+// Process parses the rules for the tailorings of this collation
+// and calls the respective methods of p for each rule found.
+func (c Collation) Process(p RuleProcessor) (err error) {
+	if len(c.Cr) > 0 {
+		if len(c.Cr) > 1 {
+			return fmt.Errorf("multiple cr elements, want 0 or 1")
+		}
+		return processRules(p, c.Cr[0].Data())
+	}
+	if c.Rules.Any != nil {
+		return c.processXML(p)
+	}
+	return errors.New("no tailoring data")
+}
+
+// processRules parses rules in the Collation Rule Syntax defined in
+// http://www.unicode.org/reports/tr35/tr35-collation.html#Collation_Tailorings.
+func processRules(p RuleProcessor, s string) (err error) {
+	chk := func(s string, e error) string {
+		if err == nil {
+			err = e
+		}
+		return s
+	}
+	i := 0 // Save the line number for use after the loop.
+	scanner := bufio.NewScanner(strings.NewReader(s))
+	for ; scanner.Scan() && err == nil; i++ {
+		for s := skipSpace(scanner.Text()); s != "" && s[0] != '#'; s = skipSpace(s) {
+			level := 5
+			var ch byte
+			switch ch, s = s[0], s[1:]; ch {
+			case '&': // followed by <anchor> or '[' <key> ']'
+				if s = skipSpace(s); consume(&s, '[') {
+					s = chk(parseSpecialAnchor(p, s))
+				} else {
+					s = chk(parseAnchor(p, 0, s))
+				}
+			case '<': // sort relation '<'{1,4}, optionally followed by '*'.
+				for level = 1; consume(&s, '<'); level++ {
+				}
+				if level > 4 {
+					err = fmt.Errorf("level %d > 4", level)
+				}
+				fallthrough
+			case '=': // identity relation, optionally followed by *.
+				if consume(&s, '*') {
+					s = chk(parseSequence(p, level, s))
+				} else {
+					s = chk(parseOrder(p, level, s))
+				}
+			default:
+				chk("", fmt.Errorf("illegal operator %q", ch))
+				break
+			}
+		}
+	}
+	if chk("", scanner.Err()); err != nil {
+		return fmt.Errorf("%d: %v", i, err)
+	}
+	return nil
+}
+
+// parseSpecialAnchor parses the anchor syntax which is either of the form
+//    ['before' <level>] <anchor>
+// or
+//    [<label>]
+// The starting should already be consumed.
+func parseSpecialAnchor(p RuleProcessor, s string) (tail string, err error) {
+	i := strings.IndexByte(s, ']')
+	if i == -1 {
+		return "", errors.New("unmatched bracket")
+	}
+	a := strings.TrimSpace(s[:i])
+	s = s[i+1:]
+	if strings.HasPrefix(a, "before ") {
+		l, err := strconv.ParseUint(skipSpace(a[len("before "):]), 10, 3)
+		if err != nil {
+			return s, err
+		}
+		return parseAnchor(p, int(l), s)
+	}
+	return s, p.Reset(fmt.Sprintf(specialAnchor, a), 0)
+}
+
+func parseAnchor(p RuleProcessor, level int, s string) (tail string, err error) {
+	anchor, s, err := scanString(s)
+	if err != nil {
+		return s, err
+	}
+	return s, p.Reset(anchor, level)
+}
+
+func parseOrder(p RuleProcessor, level int, s string) (tail string, err error) {
+	var value, context, extend string
+	if value, s, err = scanString(s); err != nil {
+		return s, err
+	}
+	if strings.HasPrefix(value, cldrIndex) {
+		p.Index(value[len(cldrIndex):])
+		return
+	}
+	if consume(&s, '|') {
+		if context, s, err = scanString(s); err != nil {
+			return s, errors.New("missing string after context")
+		}
+	}
+	if consume(&s, '/') {
+		if extend, s, err = scanString(s); err != nil {
+			return s, errors.New("missing string after extension")
+		}
+	}
+	return s, p.Insert(level, value, context, extend)
+}
+
+// scanString scans a single input string.
+func scanString(s string) (str, tail string, err error) {
+	if s = skipSpace(s); s == "" {
+		return s, s, errors.New("missing string")
+	}
+	buf := [16]byte{} // small but enough to hold most cases.
+	value := buf[:0]
+	for s != "" {
+		if consume(&s, '\'') {
+			i := strings.IndexByte(s, '\'')
+			if i == -1 {
+				return "", "", errors.New(`unmatched single quote`)
+			}
+			if i == 0 {
+				value = append(value, '\'')
+			} else {
+				value = append(value, s[:i]...)
+			}
+			s = s[i+1:]
+			continue
+		}
+		r, sz := utf8.DecodeRuneInString(s)
+		if unicode.IsSpace(r) || strings.ContainsRune("&<=#", r) {
+			break
+		}
+		value = append(value, s[:sz]...)
+		s = s[sz:]
+	}
+	return string(value), skipSpace(s), nil
+}
+
+func parseSequence(p RuleProcessor, level int, s string) (tail string, err error) {
+	if s = skipSpace(s); s == "" {
+		return s, errors.New("empty sequence")
+	}
+	last := rune(0)
+	for s != "" {
+		r, sz := utf8.DecodeRuneInString(s)
+		s = s[sz:]
+
+		if r == '-' {
+			// We have a range. The first element was already written.
+			if last == 0 {
+				return s, errors.New("range without starter value")
+			}
+			r, sz = utf8.DecodeRuneInString(s)
+			s = s[sz:]
+			if r == utf8.RuneError || r < last {
+				return s, fmt.Errorf("invalid range %q-%q", last, r)
+			}
+			for i := last + 1; i <= r; i++ {
+				if err := p.Insert(level, string(i), "", ""); err != nil {
+					return s, err
+				}
+			}
+			last = 0
+			continue
+		}
+
+		if unicode.IsSpace(r) || unicode.IsPunct(r) {
+			break
+		}
+
+		// normal case
+		if err := p.Insert(level, string(r), "", ""); err != nil {
+			return s, err
+		}
+		last = r
+	}
+	return s, nil
+}
+
+func skipSpace(s string) string {
+	return strings.TrimLeftFunc(s, unicode.IsSpace)
+}
+
+// consumes returns whether the next byte is ch. If so, it gobbles it by
+// updating s.
+func consume(s *string, ch byte) (ok bool) {
+	if *s == "" || (*s)[0] != ch {
+		return false
+	}
+	*s = (*s)[1:]
+	return true
+}
+
+// The following code parses Collation rules of CLDR version 24 and before.
+
+var lmap = map[byte]int{
+	'p': 1,
+	's': 2,
+	't': 3,
+	'i': 5,
+}
+
+type rulesElem struct {
+	Rules struct {
+		Common
+		Any []*struct {
+			XMLName xml.Name
+			rule
+		} `xml:",any"`
+	} `xml:"rules"`
+}
+
+type rule struct {
+	Value  string `xml:",chardata"`
+	Before string `xml:"before,attr"`
+	Any    []*struct {
+		XMLName xml.Name
+		rule
+	} `xml:",any"`
+}
+
+var emptyValueError = errors.New("cldr: empty rule value")
+
+func (r *rule) value() (string, error) {
+	// Convert hexadecimal Unicode codepoint notation to a string.
+	s := charRe.ReplaceAllStringFunc(r.Value, replaceUnicode)
+	r.Value = s
+	if s == "" {
+		if len(r.Any) != 1 {
+			return "", emptyValueError
+		}
+		r.Value = fmt.Sprintf(specialAnchor, r.Any[0].XMLName.Local)
+		r.Any = nil
+	} else if len(r.Any) != 0 {
+		return "", fmt.Errorf("cldr: XML elements found in collation rule: %v", r.Any)
+	}
+	return r.Value, nil
+}
+
+func (r rule) process(p RuleProcessor, name, context, extend string) error {
+	v, err := r.value()
+	if err != nil {
+		return err
+	}
+	switch name {
+	case "p", "s", "t", "i":
+		if strings.HasPrefix(v, cldrIndex) {
+			p.Index(v[len(cldrIndex):])
+			return nil
+		}
+		if err := p.Insert(lmap[name[0]], v, context, extend); err != nil {
+			return err
+		}
+	case "pc", "sc", "tc", "ic":
+		level := lmap[name[0]]
+		for _, s := range v {
+			if err := p.Insert(level, string(s), context, extend); err != nil {
+				return err
+			}
+		}
+	default:
+		return fmt.Errorf("cldr: unsupported tag: %q", name)
+	}
+	return nil
+}
+
+// processXML parses the format of CLDR versions 24 and older.
+func (c Collation) processXML(p RuleProcessor) (err error) {
+	// Collation is generated and defined in xml.go.
+	var v string
+	for _, r := range c.Rules.Any {
+		switch r.XMLName.Local {
+		case "reset":
+			level := 0
+			switch r.Before {
+			case "primary", "1":
+				level = 1
+			case "secondary", "2":
+				level = 2
+			case "tertiary", "3":
+				level = 3
+			case "":
+			default:
+				return fmt.Errorf("cldr: unknown level %q", r.Before)
+			}
+			v, err = r.value()
+			if err == nil {
+				err = p.Reset(v, level)
+			}
+		case "x":
+			var context, extend string
+			for _, r1 := range r.Any {
+				v, err = r1.value()
+				switch r1.XMLName.Local {
+				case "context":
+					context = v
+				case "extend":
+					extend = v
+				}
+			}
+			for _, r1 := range r.Any {
+				if t := r1.XMLName.Local; t == "context" || t == "extend" {
+					continue
+				}
+				r1.rule.process(p, r1.XMLName.Local, context, extend)
+			}
+		default:
+			err = r.rule.process(p, r.XMLName.Local, "", "")
+		}
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}

vendor/golang.org/x/text/unicode/cldr/decode.go

@@ -0,0 +1,171 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cldr
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+)
+
+// A Decoder loads an archive of CLDR data.
+type Decoder struct {
+	dirFilter     []string
+	sectionFilter []string
+	loader        Loader
+	cldr          *CLDR
+	curLocale     string
+}
+
+// SetSectionFilter takes a list top-level LDML element names to which
+// evaluation of LDML should be limited.  It automatically calls SetDirFilter.
+func (d *Decoder) SetSectionFilter(filter ...string) {
+	d.sectionFilter = filter
+	// TODO: automatically set dir filter
+}
+
+// SetDirFilter limits the loading of LDML XML files of the specied directories.
+// Note that sections may be split across directories differently for different CLDR versions.
+// For more robust code, use SetSectionFilter.
+func (d *Decoder) SetDirFilter(dir ...string) {
+	d.dirFilter = dir
+}
+
+// A Loader provides access to the files of a CLDR archive.
+type Loader interface {
+	Len() int
+	Path(i int) string
+	Reader(i int) (io.ReadCloser, error)
+}
+
+var fileRe = regexp.MustCompile(".*/(.*)/(.*)\\.xml")
+
+// Decode loads and decodes the files represented by l.
+func (d *Decoder) Decode(l Loader) (cldr *CLDR, err error) {
+	d.cldr = makeCLDR()
+	for i := 0; i < l.Len(); i++ {
+		fname := l.Path(i)
+		if m := fileRe.FindStringSubmatch(fname); m != nil {
+			if len(d.dirFilter) > 0 && !in(d.dirFilter, m[1]) {
+				continue
+			}
+			var r io.Reader
+			if r, err = l.Reader(i); err == nil {
+				err = d.decode(m[1], m[2], r)
+			}
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+	d.cldr.finalize(d.sectionFilter)
+	return d.cldr, nil
+}
+
+func (d *Decoder) decode(dir, id string, r io.Reader) error {
+	var v interface{}
+	var l *LDML
+	cldr := d.cldr
+	switch {
+	case dir == "supplemental":
+		v = cldr.supp
+	case dir == "transforms":
+		return nil
+	case dir == "bcp47":
+		v = cldr.bcp47
+	case dir == "validity":
+		return nil
+	default:
+		ok := false
+		if v, ok = cldr.locale[id]; !ok {
+			l = &LDML{}
+			v, cldr.locale[id] = l, l
+		}
+	}
+	x := xml.NewDecoder(r)
+	if err := x.Decode(v); err != nil {
+		log.Printf("%s/%s: %v", dir, id, err)
+		return err
+	}
+	if l != nil {
+		if l.Identity == nil {
+			return fmt.Errorf("%s/%s: missing identity element", dir, id)
+		}
+		// TODO: verify when CLDR bug http://unicode.org/cldr/trac/ticket/8970
+		// is resolved.
+		// path := strings.Split(id, "_")
+		// if lang := l.Identity.Language.Type; lang != path[0] {
+		// 	return fmt.Errorf("%s/%s: language was %s; want %s", dir, id, lang, path[0])
+		// }
+	}
+	return nil
+}
+
+type pathLoader []string
+
+func makePathLoader(path string) (pl pathLoader, err error) {
+	err = filepath.Walk(path, func(path string, _ os.FileInfo, err error) error {
+		pl = append(pl, path)
+		return err
+	})
+	return pl, err
+}
+
+func (pl pathLoader) Len() int {
+	return len(pl)
+}
+
+func (pl pathLoader) Path(i int) string {
+	return pl[i]
+}
+
+func (pl pathLoader) Reader(i int) (io.ReadCloser, error) {
+	return os.Open(pl[i])
+}
+
+// DecodePath loads CLDR data from the given path.
+func (d *Decoder) DecodePath(path string) (cldr *CLDR, err error) {
+	loader, err := makePathLoader(path)
+	if err != nil {
+		return nil, err
+	}
+	return d.Decode(loader)
+}
+
+type zipLoader struct {
+	r *zip.Reader
+}
+
+func (zl zipLoader) Len() int {
+	return len(zl.r.File)
+}
+
+func (zl zipLoader) Path(i int) string {
+	return zl.r.File[i].Name
+}
+
+func (zl zipLoader) Reader(i int) (io.ReadCloser, error) {
+	return zl.r.File[i].Open()
+}
+
+// DecodeZip loads CLDR data from the zip archive for which r is the source.
+func (d *Decoder) DecodeZip(r io.Reader) (cldr *CLDR, err error) {
+	buffer, err := ioutil.ReadAll(r)
+	if err != nil {
+		return nil, err
+	}
+	archive, err := zip.NewReader(bytes.NewReader(buffer), int64(len(buffer)))
+	if err != nil {
+		return nil, err
+	}
+	return d.Decode(zipLoader{archive})
+}

vendor/golang.org/x/text/unicode/cldr/makexml.go

@@ -0,0 +1,400 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ignore
+
+// This tool generates types for the various XML formats of CLDR.
+package main
+
+import (
+	"archive/zip"
+	"bytes"
+	"encoding/xml"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"os"
+	"regexp"
+	"strings"
+
+	"golang.org/x/text/internal/gen"
+)
+
+var outputFile = flag.String("output", "xml.go", "output file name")
+
+func main() {
+	flag.Parse()
+
+	r := gen.OpenCLDRCoreZip()
+	buffer, err := ioutil.ReadAll(r)
+	if err != nil {
+		log.Fatal("Could not read zip file")
+	}
+	r.Close()
+	z, err := zip.NewReader(bytes.NewReader(buffer), int64(len(buffer)))
+	if err != nil {
+		log.Fatalf("Could not read zip archive: %v", err)
+	}
+
+	var buf bytes.Buffer
+
+	version := gen.CLDRVersion()
+
+	for _, dtd := range files {
+		for _, f := range z.File {
+			if strings.HasSuffix(f.Name, dtd.file+".dtd") {
+				r, err := f.Open()
+				failOnError(err)
+
+				b := makeBuilder(&buf, dtd)
+				b.parseDTD(r)
+				b.resolve(b.index[dtd.top[0]])
+				b.write()
+				if b.version != "" && version != b.version {
+					println(f.Name)
+					log.Fatalf("main: inconsistent versions: found %s; want %s", b.version, version)
+				}
+				break
+			}
+		}
+	}
+	fmt.Fprintln(&buf, "// Version is the version of CLDR from which the XML definitions are generated.")
+	fmt.Fprintf(&buf, "const Version = %q\n", version)
+
+	gen.WriteGoFile(*outputFile, "cldr", buf.Bytes())
+}
+
+func failOnError(err error) {
+	if err != nil {
+		log.New(os.Stderr, "", log.Lshortfile).Output(2, err.Error())
+		os.Exit(1)
+	}
+}
+
+// configuration data per DTD type
+type dtd struct {
+	file string   // base file name
+	root string   // Go name of the root XML element
+	top  []string // create a different type for this section
+
+	skipElem    []string // hard-coded or deprecated elements
+	skipAttr    []string // attributes to exclude
+	predefined  []string // hard-coded elements exist of the form <name>Elem
+	forceRepeat []string // elements to make slices despite DTD
+}
+
+var files = []dtd{
+	{
+		file: "ldmlBCP47",
+		root: "LDMLBCP47",
+		top:  []string{"ldmlBCP47"},
+		skipElem: []string{
+			"cldrVersion", // deprecated, not used
+		},
+	},
+	{
+		file: "ldmlSupplemental",
+		root: "SupplementalData",
+		top:  []string{"supplementalData"},
+		skipElem: []string{
+			"cldrVersion", // deprecated, not used
+		},
+		forceRepeat: []string{
+			"plurals", // data defined in plurals.xml and ordinals.xml
+		},
+	},
+	{
+		file: "ldml",
+		root: "LDML",
+		top: []string{
+			"ldml", "collation", "calendar", "timeZoneNames", "localeDisplayNames", "numbers",
+		},
+		skipElem: []string{
+			"cp",       // not used anywhere
+			"special",  // not used anywhere
+			"fallback", // deprecated, not used
+			"alias",    // in Common
+			"default",  // in Common
+		},
+		skipAttr: []string{
+			"hiraganaQuarternary", // typo in DTD, correct version included as well
+		},
+		predefined: []string{"rules"},
+	},
+}
+
+var comments = map[string]string{
+	"ldmlBCP47": `
+// LDMLBCP47 holds information on allowable values for various variables in LDML.
+`,
+	"supplementalData": `
+// SupplementalData holds information relevant for internationalization
+// and proper use of CLDR, but that is not contained in the locale hierarchy.
+`,
+	"ldml": `
+// LDML is the top-level type for locale-specific data.
+`,
+	"collation": `
+// Collation contains rules that specify a certain sort-order,
+// as a tailoring of the root order. 
+// The parsed rules are obtained by passing a RuleProcessor to Collation's
+// Process method.
+`,
+	"calendar": `
+// Calendar specifies the fields used for formatting and parsing dates and times.
+// The month and quarter names are identified numerically, starting at 1.
+// The day (of the week) names are identified with short strings, since there is
+// no universally-accepted numeric designation.
+`,
+	"dates": `
+// Dates contains information regarding the format and parsing of dates and times.
+`,
+	"localeDisplayNames": `
+// LocaleDisplayNames specifies localized display names for for scripts, languages,
+// countries, currencies, and variants.
+`,
+	"numbers": `
+// Numbers supplies information for formatting and parsing numbers and currencies.
+`,
+}
+
+type element struct {
+	name      string // XML element name
+	category  string // elements contained by this element
+	signature string // category + attrKey*
+
+	attr []*attribute // attributes supported by this element.
+	sub  []struct {   // parsed and evaluated sub elements of this element.
+		e      *element
+		repeat bool // true if the element needs to be a slice
+	}
+
+	resolved bool // prevent multiple resolutions of this element.
+}
+
+type attribute struct {
+	name string
+	key  string
+	list []string
+
+	tag string // Go tag
+}
+
+var (
+	reHead  = regexp.MustCompile(` *(\w+) +([\w\-]+)`)
+	reAttr  = regexp.MustCompile(` *(\w+) *(?:(\w+)|\(([\w\- \|]+)\)) *(?:#([A-Z]*) *(?:\"([\.\d+])\")?)? *("[\w\-:]*")?`)
+	reElem  = regexp.MustCompile(`^ *(EMPTY|ANY|\(.*\)[\*\+\?]?) *$`)
+	reToken = regexp.MustCompile(`\w\-`)
+)
+
+// builder is used to read in the DTD files from CLDR and generate Go code
+// to be used with the encoding/xml package.
+type builder struct {
+	w       io.Writer
+	index   map[string]*element
+	elem    []*element
+	info    dtd
+	version string
+}
+
+func makeBuilder(w io.Writer, d dtd) builder {
+	return builder{
+		w:     w,
+		index: make(map[string]*element),
+		elem:  []*element{},
+		info:  d,
+	}
+}
+
+// parseDTD parses a DTD file.
+func (b *builder) parseDTD(r io.Reader) {
+	for d := xml.NewDecoder(r); ; {
+		t, err := d.Token()
+		if t == nil {
+			break
+		}
+		failOnError(err)
+		dir, ok := t.(xml.Directive)
+		if !ok {
+			continue
+		}
+		m := reHead.FindSubmatch(dir)
+		dir = dir[len(m[0]):]
+		ename := string(m[2])
+		el, elementFound := b.index[ename]
+		switch string(m[1]) {
+		case "ELEMENT":
+			if elementFound {
+				log.Fatal("parseDTD: duplicate entry for element %q", ename)
+			}
+			m := reElem.FindSubmatch(dir)
+			if m == nil {
+				log.Fatalf("parseDTD: invalid element %q", string(dir))
+			}
+			if len(m[0]) != len(dir) {
+				log.Fatal("parseDTD: invalid element %q", string(dir), len(dir), len(m[0]), string(m[0]))
+			}
+			s := string(m[1])
+			el = &element{
+				name:     ename,
+				category: s,
+			}
+			b.index[ename] = el
+		case "ATTLIST":
+			if !elementFound {
+				log.Fatalf("parseDTD: unknown element %q", ename)
+			}
+			s := string(dir)
+			m := reAttr.FindStringSubmatch(s)
+			if m == nil {
+				log.Fatal(fmt.Errorf("parseDTD: invalid attribute %q", string(dir)))
+			}
+			if m[4] == "FIXED" {
+				b.version = m[5]
+			} else {
+				switch m[1] {
+				case "draft", "references", "alt", "validSubLocales", "standard" /* in Common */ :
+				case "type", "choice":
+				default:
+					el.attr = append(el.attr, &attribute{
+						name: m[1],
+						key:  s,
+						list: reToken.FindAllString(m[3], -1),
+					})
+					el.signature = fmt.Sprintf("%s=%s+%s", el.signature, m[1], m[2])
+				}
+			}
+		}
+	}
+}
+
+var reCat = regexp.MustCompile(`[ ,\|]*(?:(\(|\)|\#?[\w_-]+)([\*\+\?]?))?`)
+
+// resolve takes a parsed element and converts it into structured data
+// that can be used to generate the XML code.
+func (b *builder) resolve(e *element) {
+	if e.resolved {
+		return
+	}
+	b.elem = append(b.elem, e)
+	e.resolved = true
+	s := e.category
+	found := make(map[string]bool)
+	sequenceStart := []int{}
+	for len(s) > 0 {
+		m := reCat.FindStringSubmatch(s)
+		if m == nil {
+			log.Fatalf("%s: invalid category string %q", e.name, s)
+		}
+		repeat := m[2] == "*" || m[2] == "+" || in(b.info.forceRepeat, m[1])
+		switch m[1] {
+		case "":
+		case "(":
+			sequenceStart = append(sequenceStart, len(e.sub))
+		case ")":
+			if len(sequenceStart) == 0 {
+				log.Fatalf("%s: unmatched closing parenthesis", e.name)
+			}
+			for i := sequenceStart[len(sequenceStart)-1]; i < len(e.sub); i++ {
+				e.sub[i].repeat = e.sub[i].repeat || repeat
+			}
+			sequenceStart = sequenceStart[:len(sequenceStart)-1]
+		default:
+			if in(b.info.skipElem, m[1]) {
+			} else if sub, ok := b.index[m[1]]; ok {
+				if !found[sub.name] {
+					e.sub = append(e.sub, struct {
+						e      *element
+						repeat bool
+					}{sub, repeat})
+					found[sub.name] = true
+					b.resolve(sub)
+				}
+			} else if m[1] == "#PCDATA" || m[1] == "ANY" {
+			} else if m[1] != "EMPTY" {
+				log.Fatalf("resolve:%s: element %q not found", e.name, m[1])
+			}
+		}
+		s = s[len(m[0]):]
+	}
+}
+
+// return true if s is contained in set.
+func in(set []string, s string) bool {
+	for _, v := range set {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}
+
+var repl = strings.NewReplacer("-", " ", "_", " ")
+
+// title puts the first character or each character following '_' in title case and
+// removes all occurrences of '_'.
+func title(s string) string {
+	return strings.Replace(strings.Title(repl.Replace(s)), " ", "", -1)
+}
+
+// writeElem generates Go code for a single element, recursively.
+func (b *builder) writeElem(tab int, e *element) {
+	p := func(f string, x ...interface{}) {
+		f = strings.Replace(f, "\n", "\n"+strings.Repeat("\t", tab), -1)
+		fmt.Fprintf(b.w, f, x...)
+	}
+	if len(e.sub) == 0 && len(e.attr) == 0 {
+		p("Common")
+		return
+	}
+	p("struct {")
+	tab++
+	p("\nCommon")
+	for _, attr := range e.attr {
+		if !in(b.info.skipAttr, attr.name) {
+			p("\n%s string `xml:\"%s,attr\"`", title(attr.name), attr.name)
+		}
+	}
+	for _, sub := range e.sub {
+		if in(b.info.predefined, sub.e.name) {
+			p("\n%sElem", sub.e.name)
+			continue
+		}
+		if in(b.info.skipElem, sub.e.name) {
+			continue
+		}
+		p("\n%s ", title(sub.e.name))
+		if sub.repeat {
+			p("[]")
+		}
+		p("*")
+		if in(b.info.top, sub.e.name) {
+			p(title(sub.e.name))
+		} else {
+			b.writeElem(tab, sub.e)
+		}
+		p(" `xml:\"%s\"`", sub.e.name)
+	}
+	tab--
+	p("\n}")
+}
+
+// write generates the Go XML code.
+func (b *builder) write() {
+	for i, name := range b.info.top {
+		e := b.index[name]
+		if e != nil {
+			fmt.Fprintf(b.w, comments[name])
+			name := title(e.name)
+			if i == 0 {
+				name = b.info.root
+			}
+			fmt.Fprintf(b.w, "type %s ", name)
+			b.writeElem(0, e)
+			fmt.Fprint(b.w, "\n")
+		}
+	}
+}

vendor/golang.org/x/text/unicode/cldr/resolve.go

@@ -0,0 +1,602 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cldr
+
+// This file implements the various inheritance constructs defined by LDML.
+// See http://www.unicode.org/reports/tr35/#Inheritance_and_Validity
+// for more details.
+
+import (
+	"fmt"
+	"log"
+	"reflect"
+	"regexp"
+	"sort"
+	"strings"
+)
+
+// fieldIter iterates over fields in a struct. It includes
+// fields of embedded structs.
+type fieldIter struct {
+	v        reflect.Value
+	index, n []int
+}
+
+func iter(v reflect.Value) fieldIter {
+	if v.Kind() != reflect.Struct {
+		log.Panicf("value %v must be a struct", v)
+	}
+	i := fieldIter{
+		v:     v,
+		index: []int{0},
+		n:     []int{v.NumField()},
+	}
+	i.descent()
+	return i
+}
+
+func (i *fieldIter) descent() {
+	for f := i.field(); f.Anonymous && f.Type.NumField() > 0; f = i.field() {
+		i.index = append(i.index, 0)
+		i.n = append(i.n, f.Type.NumField())
+	}
+}
+
+func (i *fieldIter) done() bool {
+	return len(i.index) == 1 && i.index[0] >= i.n[0]
+}
+
+func skip(f reflect.StructField) bool {
+	return !f.Anonymous && (f.Name[0] < 'A' || f.Name[0] > 'Z')
+}
+
+func (i *fieldIter) next() {
+	for {
+		k := len(i.index) - 1
+		i.index[k]++
+		if i.index[k] < i.n[k] {
+			if !skip(i.field()) {
+				break
+			}
+		} else {
+			if k == 0 {
+				return
+			}
+			i.index = i.index[:k]
+			i.n = i.n[:k]
+		}
+	}
+	i.descent()
+}
+
+func (i *fieldIter) value() reflect.Value {
+	return i.v.FieldByIndex(i.index)
+}
+
+func (i *fieldIter) field() reflect.StructField {
+	return i.v.Type().FieldByIndex(i.index)
+}
+
+type visitor func(v reflect.Value) error
+
+var stopDescent = fmt.Errorf("do not recurse")
+
+func (f visitor) visit(x interface{}) error {
+	return f.visitRec(reflect.ValueOf(x))
+}
+
+// visit recursively calls f on all nodes in v.
+func (f visitor) visitRec(v reflect.Value) error {
+	if v.Kind() == reflect.Ptr {
+		if v.IsNil() {
+			return nil
+		}
+		return f.visitRec(v.Elem())
+	}
+	if err := f(v); err != nil {
+		if err == stopDescent {
+			return nil
+		}
+		return err
+	}
+	switch v.Kind() {
+	case reflect.Struct:
+		for i := iter(v); !i.done(); i.next() {
+			if err := f.visitRec(i.value()); err != nil {
+				return err
+			}
+		}
+	case reflect.Slice:
+		for i := 0; i < v.Len(); i++ {
+			if err := f.visitRec(v.Index(i)); err != nil {
+				return err
+			}
+		}
+	}
+	return nil
+}
+
+// getPath is used for error reporting purposes only.
+func getPath(e Elem) string {
+	if e == nil {
+		return "<nil>"
+	}
+	if e.enclosing() == nil {
+		return e.GetCommon().name
+	}
+	if e.GetCommon().Type == "" {
+		return fmt.Sprintf("%s.%s", getPath(e.enclosing()), e.GetCommon().name)
+	}
+	return fmt.Sprintf("%s.%s[type=%s]", getPath(e.enclosing()), e.GetCommon().name, e.GetCommon().Type)
+}
+
+// xmlName returns the xml name of the element or attribute
+func xmlName(f reflect.StructField) (name string, attr bool) {
+	tags := strings.Split(f.Tag.Get("xml"), ",")
+	for _, s := range tags {
+		attr = attr || s == "attr"
+	}
+	return tags[0], attr
+}
+
+func findField(v reflect.Value, key string) (reflect.Value, error) {
+	v = reflect.Indirect(v)
+	for i := iter(v); !i.done(); i.next() {
+		if n, _ := xmlName(i.field()); n == key {
+			return i.value(), nil
+		}
+	}
+	return reflect.Value{}, fmt.Errorf("cldr: no field %q in element %#v", key, v.Interface())
+}
+
+var xpathPart = regexp.MustCompile(`(\pL+)(?:\[@(\pL+)='([\w-]+)'\])?`)
+
+func walkXPath(e Elem, path string) (res Elem, err error) {
+	for _, c := range strings.Split(path, "/") {
+		if c == ".." {
+			if e = e.enclosing(); e == nil {
+				panic("path ..")
+				return nil, fmt.Errorf(`cldr: ".." moves past root in path %q`, path)
+			}
+			continue
+		} else if c == "" {
+			continue
+		}
+		m := xpathPart.FindStringSubmatch(c)
+		if len(m) == 0 || len(m[0]) != len(c) {
+			return nil, fmt.Errorf("cldr: syntax error in path component %q", c)
+		}
+		v, err := findField(reflect.ValueOf(e), m[1])
+		if err != nil {
+			return nil, err
+		}
+		switch v.Kind() {
+		case reflect.Slice:
+			i := 0
+			if m[2] != "" || v.Len() > 1 {
+				if m[2] == "" {
+					m[2] = "type"
+					if m[3] = e.GetCommon().Default(); m[3] == "" {
+						return nil, fmt.Errorf("cldr: type selector or default value needed for element %s", m[1])
+					}
+				}
+				for ; i < v.Len(); i++ {
+					vi := v.Index(i)
+					key, err := findField(vi.Elem(), m[2])
+					if err != nil {
+						return nil, err
+					}
+					key = reflect.Indirect(key)
+					if key.Kind() == reflect.String && key.String() == m[3] {
+						break
+					}
+				}
+			}
+			if i == v.Len() || v.Index(i).IsNil() {
+				return nil, fmt.Errorf("no %s found with %s==%s", m[1], m[2], m[3])
+			}
+			e = v.Index(i).Interface().(Elem)
+		case reflect.Ptr:
+			if v.IsNil() {
+				return nil, fmt.Errorf("cldr: element %q not found within element %q", m[1], e.GetCommon().name)
+			}
+			var ok bool
+			if e, ok = v.Interface().(Elem); !ok {
+				return nil, fmt.Errorf("cldr: %q is not an XML element", m[1])
+			} else if m[2] != "" || m[3] != "" {
+				return nil, fmt.Errorf("cldr: no type selector allowed for element %s", m[1])
+			}
+		default:
+			return nil, fmt.Errorf("cldr: %q is not an XML element", m[1])
+		}
+	}
+	return e, nil
+}
+
+const absPrefix = "//ldml/"
+
+func (cldr *CLDR) resolveAlias(e Elem, src, path string) (res Elem, err error) {
+	if src != "locale" {
+		if !strings.HasPrefix(path, absPrefix) {
+			return nil, fmt.Errorf("cldr: expected absolute path, found %q", path)
+		}
+		path = path[len(absPrefix):]
+		if e, err = cldr.resolve(src); err != nil {
+			return nil, err
+		}
+	}
+	return walkXPath(e, path)
+}
+
+func (cldr *CLDR) resolveAndMergeAlias(e Elem) error {
+	alias := e.GetCommon().Alias
+	if alias == nil {
+		return nil
+	}
+	a, err := cldr.resolveAlias(e, alias.Source, alias.Path)
+	if err != nil {
+		return fmt.Errorf("%v: error evaluating path %q: %v", getPath(e), alias.Path, err)
+	}
+	// Ensure alias node was already evaluated. TODO: avoid double evaluation.
+	err = cldr.resolveAndMergeAlias(a)
+	v := reflect.ValueOf(e).Elem()
+	for i := iter(reflect.ValueOf(a).Elem()); !i.done(); i.next() {
+		if vv := i.value(); vv.Kind() != reflect.Ptr || !vv.IsNil() {
+			if _, attr := xmlName(i.field()); !attr {
+				v.FieldByIndex(i.index).Set(vv)
+			}
+		}
+	}
+	return err
+}
+
+func (cldr *CLDR) aliasResolver() visitor {
+	return func(v reflect.Value) (err error) {
+		if e, ok := v.Addr().Interface().(Elem); ok {
+			err = cldr.resolveAndMergeAlias(e)
+			if err == nil && blocking[e.GetCommon().name] {
+				return stopDescent
+			}
+		}
+		return err
+	}
+}
+
+// elements within blocking elements do not inherit.
+// Taken from CLDR's supplementalMetaData.xml.
+var blocking = map[string]bool{
+	"identity":         true,
+	"supplementalData": true,
+	"cldrTest":         true,
+	"collation":        true,
+	"transform":        true,
+}
+
+// Distinguishing attributes affect inheritance; two elements with different
+// distinguishing attributes are treated as different for purposes of inheritance,
+// except when such attributes occur in the indicated elements.
+// Taken from CLDR's supplementalMetaData.xml.
+var distinguishing = map[string][]string{
+	"key":        nil,
+	"request_id": nil,
+	"id":         nil,
+	"registry":   nil,
+	"alt":        nil,
+	"iso4217":    nil,
+	"iso3166":    nil,
+	"mzone":      nil,
+	"from":       nil,
+	"to":         nil,
+	"type": []string{
+		"abbreviationFallback",
+		"default",
+		"mapping",
+		"measurementSystem",
+		"preferenceOrdering",
+	},
+	"numberSystem": nil,
+}
+
+func in(set []string, s string) bool {
+	for _, v := range set {
+		if v == s {
+			return true
+		}
+	}
+	return false
+}
+
+// attrKey computes a key based on the distinguishable attributes of
+// an element and it's values.
+func attrKey(v reflect.Value, exclude ...string) string {
+	parts := []string{}
+	ename := v.Interface().(Elem).GetCommon().name
+	v = v.Elem()
+	for i := iter(v); !i.done(); i.next() {
+		if name, attr := xmlName(i.field()); attr {
+			if except, ok := distinguishing[name]; ok && !in(exclude, name) && !in(except, ename) {
+				v := i.value()
+				if v.Kind() == reflect.Ptr {
+					v = v.Elem()
+				}
+				if v.IsValid() {
+					parts = append(parts, fmt.Sprintf("%s=%s", name, v.String()))
+				}
+			}
+		}
+	}
+	sort.Strings(parts)
+	return strings.Join(parts, ";")
+}
+
+// Key returns a key for e derived from all distinguishing attributes
+// except those specified by exclude.
+func Key(e Elem, exclude ...string) string {
+	return attrKey(reflect.ValueOf(e), exclude...)
+}
+
+// linkEnclosing sets the enclosing element as well as the name
+// for all sub-elements of child, recursively.
+func linkEnclosing(parent, child Elem) {
+	child.setEnclosing(parent)
+	v := reflect.ValueOf(child).Elem()
+	for i := iter(v); !i.done(); i.next() {
+		vf := i.value()
+		if vf.Kind() == reflect.Slice {
+			for j := 0; j < vf.Len(); j++ {
+				linkEnclosing(child, vf.Index(j).Interface().(Elem))
+			}
+		} else if vf.Kind() == reflect.Ptr && !vf.IsNil() && vf.Elem().Kind() == reflect.Struct {
+			linkEnclosing(child, vf.Interface().(Elem))
+		}
+	}
+}
+
+func setNames(e Elem, name string) {
+	e.setName(name)
+	v := reflect.ValueOf(e).Elem()
+	for i := iter(v); !i.done(); i.next() {
+		vf := i.value()
+		name, _ = xmlName(i.field())
+		if vf.Kind() == reflect.Slice {
+			for j := 0; j < vf.Len(); j++ {
+				setNames(vf.Index(j).Interface().(Elem), name)
+			}
+		} else if vf.Kind() == reflect.Ptr && !vf.IsNil() && vf.Elem().Kind() == reflect.Struct {
+			setNames(vf.Interface().(Elem), name)
+		}
+	}
+}
+
+// deepCopy copies elements of v recursively.  All elements of v that may
+// be modified by inheritance are explicitly copied.
+func deepCopy(v reflect.Value) reflect.Value {
+	switch v.Kind() {
+	case reflect.Ptr:
+		if v.IsNil() || v.Elem().Kind() != reflect.Struct {
+			return v
+		}
+		nv := reflect.New(v.Elem().Type())
+		nv.Elem().Set(v.Elem())
+		deepCopyRec(nv.Elem(), v.Elem())
+		return nv
+	case reflect.Slice:
+		nv := reflect.MakeSlice(v.Type(), v.Len(), v.Len())
+		for i := 0; i < v.Len(); i++ {
+			deepCopyRec(nv.Index(i), v.Index(i))
+		}
+		return nv
+	}
+	panic("deepCopy: must be called with pointer or slice")
+}
+
+// deepCopyRec is only called by deepCopy.
+func deepCopyRec(nv, v reflect.Value) {
+	if v.Kind() == reflect.Struct {
+		t := v.Type()
+		for i := 0; i < v.NumField(); i++ {
+			if name, attr := xmlName(t.Field(i)); name != "" && !attr {
+				deepCopyRec(nv.Field(i), v.Field(i))
+			}
+		}
+	} else {
+		nv.Set(deepCopy(v))
+	}
+}
+
+// newNode is used to insert a missing node during inheritance.
+func (cldr *CLDR) newNode(v, enc reflect.Value) reflect.Value {
+	n := reflect.New(v.Type())
+	for i := iter(v); !i.done(); i.next() {
+		if name, attr := xmlName(i.field()); name == "" || attr {
+			n.Elem().FieldByIndex(i.index).Set(i.value())
+		}
+	}
+	n.Interface().(Elem).GetCommon().setEnclosing(enc.Addr().Interface().(Elem))
+	return n
+}
+
+// v, parent must be pointers to struct
+func (cldr *CLDR) inheritFields(v, parent reflect.Value) (res reflect.Value, err error) {
+	t := v.Type()
+	nv := reflect.New(t)
+	nv.Elem().Set(v)
+	for i := iter(v); !i.done(); i.next() {
+		vf := i.value()
+		f := i.field()
+		name, attr := xmlName(f)
+		if name == "" || attr {
+			continue
+		}
+		pf := parent.FieldByIndex(i.index)
+		if blocking[name] {
+			if vf.IsNil() {
+				vf = pf
+			}
+			nv.Elem().FieldByIndex(i.index).Set(deepCopy(vf))
+			continue
+		}
+		switch f.Type.Kind() {
+		case reflect.Ptr:
+			if f.Type.Elem().Kind() == reflect.Struct {
+				if !vf.IsNil() {
+					if vf, err = cldr.inheritStructPtr(vf, pf); err != nil {
+						return reflect.Value{}, err
+					}
+					vf.Interface().(Elem).setEnclosing(nv.Interface().(Elem))
+					nv.Elem().FieldByIndex(i.index).Set(vf)
+				} else if !pf.IsNil() {
+					n := cldr.newNode(pf.Elem(), v)
+					if vf, err = cldr.inheritStructPtr(n, pf); err != nil {
+						return reflect.Value{}, err
+					}
+					vf.Interface().(Elem).setEnclosing(nv.Interface().(Elem))
+					nv.Elem().FieldByIndex(i.index).Set(vf)
+				}
+			}
+		case reflect.Slice:
+			vf, err := cldr.inheritSlice(nv.Elem(), vf, pf)
+			if err != nil {
+				return reflect.Zero(t), err
+			}
+			nv.Elem().FieldByIndex(i.index).Set(vf)
+		}
+	}
+	return nv, nil
+}
+
+func root(e Elem) *LDML {
+	for ; e.enclosing() != nil; e = e.enclosing() {
+	}
+	return e.(*LDML)
+}
+
+// inheritStructPtr first merges possible aliases in with v and then inherits
+// any underspecified elements from parent.
+func (cldr *CLDR) inheritStructPtr(v, parent reflect.Value) (r reflect.Value, err error) {
+	if !v.IsNil() {
+		e := v.Interface().(Elem).GetCommon()
+		alias := e.Alias
+		if alias == nil && !parent.IsNil() {
+			alias = parent.Interface().(Elem).GetCommon().Alias
+		}
+		if alias != nil {
+			a, err := cldr.resolveAlias(v.Interface().(Elem), alias.Source, alias.Path)
+			if a != nil {
+				if v, err = cldr.inheritFields(v.Elem(), reflect.ValueOf(a).Elem()); err != nil {
+					return reflect.Value{}, err
+				}
+			}
+		}
+		if !parent.IsNil() {
+			return cldr.inheritFields(v.Elem(), parent.Elem())
+		}
+	} else if parent.IsNil() {
+		panic("should not reach here")
+	}
+	return v, nil
+}
+
+// Must be slice of struct pointers.
+func (cldr *CLDR) inheritSlice(enc, v, parent reflect.Value) (res reflect.Value, err error) {
+	t := v.Type()
+	index := make(map[string]reflect.Value)
+	if !v.IsNil() {
+		for i := 0; i < v.Len(); i++ {
+			vi := v.Index(i)
+			key := attrKey(vi)
+			index[key] = vi
+		}
+	}
+	if !parent.IsNil() {
+		for i := 0; i < parent.Len(); i++ {
+			vi := parent.Index(i)
+			key := attrKey(vi)
+			if w, ok := index[key]; ok {
+				index[key], err = cldr.inheritStructPtr(w, vi)
+			} else {
+				n := cldr.newNode(vi.Elem(), enc)
+				index[key], err = cldr.inheritStructPtr(n, vi)
+			}
+			index[key].Interface().(Elem).setEnclosing(enc.Addr().Interface().(Elem))
+			if err != nil {
+				return v, err
+			}
+		}
+	}
+	keys := make([]string, 0, len(index))
+	for k, _ := range index {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	sl := reflect.MakeSlice(t, len(index), len(index))
+	for i, k := range keys {
+		sl.Index(i).Set(index[k])
+	}
+	return sl, nil
+}
+
+func parentLocale(loc string) string {
+	parts := strings.Split(loc, "_")
+	if len(parts) == 1 {
+		return "root"
+	}
+	parts = parts[:len(parts)-1]
+	key := strings.Join(parts, "_")
+	return key
+}
+
+func (cldr *CLDR) resolve(loc string) (res *LDML, err error) {
+	if r := cldr.resolved[loc]; r != nil {
+		return r, nil
+	}
+	x := cldr.RawLDML(loc)
+	if x == nil {
+		return nil, fmt.Errorf("cldr: unknown locale %q", loc)
+	}
+	var v reflect.Value
+	if loc == "root" {
+		x = deepCopy(reflect.ValueOf(x)).Interface().(*LDML)
+		linkEnclosing(nil, x)
+		err = cldr.aliasResolver().visit(x)
+	} else {
+		key := parentLocale(loc)
+		var parent *LDML
+		for ; cldr.locale[key] == nil; key = parentLocale(key) {
+		}
+		if parent, err = cldr.resolve(key); err != nil {
+			return nil, err
+		}
+		v, err = cldr.inheritFields(reflect.ValueOf(x).Elem(), reflect.ValueOf(parent).Elem())
+		x = v.Interface().(*LDML)
+		linkEnclosing(nil, x)
+	}
+	if err != nil {
+		return nil, err
+	}
+	cldr.resolved[loc] = x
+	return x, err
+}
+
+// finalize finalizes the initialization of the raw LDML structs.  It also
+// removed unwanted fields, as specified by filter, so that they will not
+// be unnecessarily evaluated.
+func (cldr *CLDR) finalize(filter []string) {
+	for _, x := range cldr.locale {
+		if filter != nil {
+			v := reflect.ValueOf(x).Elem()
+			t := v.Type()
+			for i := 0; i < v.NumField(); i++ {
+				f := t.Field(i)
+				name, _ := xmlName(f)
+				if name != "" && name != "identity" && !in(filter, name) {
+					v.Field(i).Set(reflect.Zero(f.Type))
+				}
+			}
+		}
+		linkEnclosing(nil, x) // for resolving aliases and paths
+		setNames(x, "ldml")
+	}
+}

vendor/golang.org/x/text/unicode/cldr/slice.go

@@ -0,0 +1,144 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cldr
+
+import (
+	"fmt"
+	"reflect"
+	"sort"
+)
+
+// Slice provides utilities for modifying slices of elements.
+// It can be wrapped around any slice of which the element type implements
+// interface Elem.
+type Slice struct {
+	ptr reflect.Value
+	typ reflect.Type
+}
+
+// Value returns the reflect.Value of the underlying slice.
+func (s *Slice) Value() reflect.Value {
+	return s.ptr.Elem()
+}
+
+// MakeSlice wraps a pointer to a slice of Elems.
+// It replaces the array pointed to by the slice so that subsequent modifications
+// do not alter the data in a CLDR type.
+// It panics if an incorrect type is passed.
+func MakeSlice(slicePtr interface{}) Slice {
+	ptr := reflect.ValueOf(slicePtr)
+	if ptr.Kind() != reflect.Ptr {
+		panic(fmt.Sprintf("MakeSlice: argument must be pointer to slice, found %v", ptr.Type()))
+	}
+	sl := ptr.Elem()
+	if sl.Kind() != reflect.Slice {
+		panic(fmt.Sprintf("MakeSlice: argument must point to a slice, found %v", sl.Type()))
+	}
+	intf := reflect.TypeOf((*Elem)(nil)).Elem()
+	if !sl.Type().Elem().Implements(intf) {
+		panic(fmt.Sprintf("MakeSlice: element type of slice (%v) does not implement Elem", sl.Type().Elem()))
+	}
+	nsl := reflect.MakeSlice(sl.Type(), sl.Len(), sl.Len())
+	reflect.Copy(nsl, sl)
+	sl.Set(nsl)
+	return Slice{
+		ptr: ptr,
+		typ: sl.Type().Elem().Elem(),
+	}
+}
+
+func (s Slice) indexForAttr(a string) []int {
+	for i := iter(reflect.Zero(s.typ)); !i.done(); i.next() {
+		if n, _ := xmlName(i.field()); n == a {
+			return i.index
+		}
+	}
+	panic(fmt.Sprintf("MakeSlice: no attribute %q for type %v", a, s.typ))
+}
+
+// Filter filters s to only include elements for which fn returns true.
+func (s Slice) Filter(fn func(e Elem) bool) {
+	k := 0
+	sl := s.Value()
+	for i := 0; i < sl.Len(); i++ {
+		vi := sl.Index(i)
+		if fn(vi.Interface().(Elem)) {
+			sl.Index(k).Set(vi)
+			k++
+		}
+	}
+	sl.Set(sl.Slice(0, k))
+}
+
+// Group finds elements in s for which fn returns the same value and groups
+// them in a new Slice.
+func (s Slice) Group(fn func(e Elem) string) []Slice {
+	m := make(map[string][]reflect.Value)
+	sl := s.Value()
+	for i := 0; i < sl.Len(); i++ {
+		vi := sl.Index(i)
+		key := fn(vi.Interface().(Elem))
+		m[key] = append(m[key], vi)
+	}
+	keys := []string{}
+	for k, _ := range m {
+		keys = append(keys, k)
+	}
+	sort.Strings(keys)
+	res := []Slice{}
+	for _, k := range keys {
+		nsl := reflect.New(sl.Type())
+		nsl.Elem().Set(reflect.Append(nsl.Elem(), m[k]...))
+		res = append(res, MakeSlice(nsl.Interface()))
+	}
+	return res
+}
+
+// SelectAnyOf filters s to contain only elements for which attr matches
+// any of the values.
+func (s Slice) SelectAnyOf(attr string, values ...string) {
+	index := s.indexForAttr(attr)
+	s.Filter(func(e Elem) bool {
+		vf := reflect.ValueOf(e).Elem().FieldByIndex(index)
+		return in(values, vf.String())
+	})
+}
+
+// SelectOnePerGroup filters s to include at most one element e per group of
+// elements matching Key(attr), where e has an attribute a that matches any
+// the values in v.
+// If more than one element in a group matches a value in v preference
+// is given to the element that matches the first value in v.
+func (s Slice) SelectOnePerGroup(a string, v []string) {
+	index := s.indexForAttr(a)
+	grouped := s.Group(func(e Elem) string { return Key(e, a) })
+	sl := s.Value()
+	sl.Set(sl.Slice(0, 0))
+	for _, g := range grouped {
+		e := reflect.Value{}
+		found := len(v)
+		gsl := g.Value()
+		for i := 0; i < gsl.Len(); i++ {
+			vi := gsl.Index(i).Elem().FieldByIndex(index)
+			j := 0
+			for ; j < len(v) && v[j] != vi.String(); j++ {
+			}
+			if j < found {
+				found = j
+				e = gsl.Index(i)
+			}
+		}
+		if found < len(v) {
+			sl.Set(reflect.Append(sl, e))
+		}
+	}
+}
+
+// SelectDraft drops all elements from the list with a draft level smaller than d
+// and selects the highest draft level of the remaining.
+// This method assumes that the input CLDR is canonicalized.
+func (s Slice) SelectDraft(d Draft) {
+	s.SelectOnePerGroup("draft", drafts[len(drafts)-2-int(d):])
+}

vendor/google.golang.org/cloud/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
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+      "Derivative Works" shall mean any work, whether in Source or Object
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+      editorial revisions, annotations, elaborations, or other modifications
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+      designated in writing by the copyright owner as "Not a Contribution."
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
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+
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+
+      (c) You must retain, in the Source form of any Derivative Works
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+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
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+          of the NOTICE file are for informational purposes only and
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+          notices within Derivative Works that You distribute, alongside
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+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
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+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
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+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+
+   Copyright 2014 Google Inc.
+
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+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/vendor.json

@@ -807,6 +807,12 @@
 			"path": "golang.org/x/sys/unix",
 			"revision": "50c6bc5e4292a1d4e65c6e9be5f53be28bcbe28e"
 		},
+		{
+			"checksumSHA1": "G9LfJI9gySazd+MyyC6QbTHx4to=",
+			"path": "golang.org/x/text/encoding/unicode",
+			"revision": "16e1d1f27f7aba51c74c0aeb7a7ee31a75c5c63c",
+			"revisionTime": "2016-10-12T14:34:48Z"
+		},
 		{
 			"checksumSHA1": "hrUTmck0J+LE+lBtCvHvemNDY8U=",
 			"path": "google.golang.org/api/compute/v1",

website/source/docs/builders/hyperv-iso.html.markdown

@@ -0,0 +1,982 @@
+---
+description: |-
+  The HyperV Packer builder is able to create HyperV virtual machines and export them.
+layout: "docs"
+page_title: "HyperV Builder (from an ISO)"
+---
+
+# HyperV Builder (from an ISO)
+
+Type: `hyperv-iso`
+
+The HyperV Packer builder is able to create [HyperV](https://www.microsoft.com/en-us/server-cloud/solutions/virtualization.aspx)
+virtual machines and export them, starting from an ISO image.
+
+The builder builds a virtual machine by creating a new virtual machine
+from scratch, booting it, installing an OS, provisioning software within
+the OS, then shutting it down. The result of the HyperV builder is a directory
+containing all the files necessary to run the virtual machine portably.
+
+## Basic Example
+
+Here is a basic example. This example is not functional. It will start the
+OS installer but then fail because we don't provide the preseed file for
+Ubuntu to self-install. Still, the example serves to show the basic configuration:
+
+```javascript
+{
+  "type": "hyperv-iso",
+  "iso_url": "http://releases.ubuntu.com/12.04/ubuntu-12.04.5-server-amd64.iso",
+  "iso_checksum": "769474248a3897f4865817446f9a4a53",
+  "iso_checksum_type": "md5",
+  "ssh_username": "packer",
+  "ssh_password": "packer",
+  "shutdown_command": "echo 'packer' | sudo -S shutdown -P now"
+}
+```
+
+It is important to add a `shutdown_command`. By default Packer halts the
+virtual machine and the file system may not be sync'd. Thus, changes made in a
+provisioner might not be saved.
+
+## Configuration Reference
+
+There are many configuration options available for the HyperV builder.
+They are organized below into two categories: required and optional. Within
+each category, the available options are alphabetized and described.
+
+In addition to the options listed here, a
+[communicator](/docs/templates/communicator.html)
+can be configured for this builder.
+
+### Required:
+
+-   `iso_checksum` (string) - The checksum for the OS ISO file. Because ISO
+    files are so large, this is required and Packer will verify it prior
+    to booting a virtual machine with the ISO attached. The type of the
+    checksum is specified with `iso_checksum_type`, documented below.
+
+-   `iso_checksum_type` (string) - The type of the checksum specified in
+    `iso_checksum`. Valid values are "none", "md5", "sha1", "sha256", or
+    "sha512" currently. While "none" will skip checksumming, this is not
+    recommended since ISO files are generally large and corruption does happen
+    from time to time.
+
+-   `iso_url` (string) - A URL to the ISO containing the installation image.
+    This URL can be either an HTTP URL or a file URL (or path to a file).
+    If this is an HTTP URL, Packer will download iso and cache it between
+    runs.
+
+### Optional:
+
+-   `boot_command` (array of strings) - This is an array of commands to type
+    when the virtual machine is first booted. The goal of these commands should
+    be to type just enough to initialize the operating system installer. Special
+    keys can be typed as well, and are covered in the section below on the boot
+    command. If this is not specified, it is assumed the installer will start
+    itself.
+
+-   `boot_wait` (string) - The time to wait after booting the initial virtual
+    machine before typing the `boot_command`. The value of this should be
+    a duration. Examples are "5s" and "1m30s" which will cause Packer to wait
+    five seconds and one minute 30 seconds, respectively. If this isn't specified,
+    the default is 10 seconds.
+
+-   `cpu` (integer) - The number of cpus the virtual machine should use. If this isn't specified,
+    the default is 1 cpu.
+
+-   `disk_size` (integer) - The size, in megabytes, of the hard disk to create
+    for the VM. By default, this is 40 GB.
+
+-   `enable_dynamic_memory` (bool) - If true enable dynamic memory for virtual machine.
+    This defaults to false.
+
+-   `enable_mac_spoofing` (bool) - If true enable mac spoofing for virtual machine.
+    This defaults to false.
+
+-   `enable_secure_boot` (bool) - If true enable secure boot for virtual machine.
+    This defaults to false.
+
+-   `enable_virtualization_extensions` (bool) - If true enable virtualization extensions for virtual machine.
+    This defaults to false. For nested virtualization you need to enable mac spoofing, disable dynamic memory
+    and have at least 4GB of RAM for virtual machine.
+
+-   `floppy_files` (array of strings) - A list of files to place onto a floppy
+    disk that is attached when the VM is booted. This is most useful
+    for unattended Windows installs, which look for an `Autounattend.xml` file
+    on removable media. By default, no floppy will be attached. All files
+    listed in this setting get placed into the root directory of the floppy
+    and the floppy is attached as the first floppy device. Currently, no
+    support exists for creating sub-directories on the floppy. Wildcard
+    characters (*, ?, and []) are allowed. Directory names are also allowed,
+    which will add all the files found in the directory to the floppy.
+
+-   `generation` (integer) - The HyperV generation for the virtual machine. By
+    default, this is 1. Generation 2 HyperV virtual machines do not support
+    floppy drives. In this scenario use `secondary_iso_images` instead. Hard
+    drives and dvd drives will also be scsi and not ide. 
+
+-   `guest_additions_mode` (string) - How should guest additions be installed.
+    If value `attach` then attach iso image with by specified by `guest_additions_path`.
+    Otherwise guest additions is not installed.
+
+-   `guest_additions_path` (string) - The path to the iso image for guest additions.
+
+-   `http_directory` (string) - Path to a directory to serve using an HTTP
+    server. The files in this directory will be available over HTTP that will
+    be requestable from the virtual machine. This is useful for hosting
+    kickstart files and so on. By default this is "", which means no HTTP
+    server will be started. The address and port of the HTTP server will be
+    available as variables in `boot_command`. This is covered in more detail
+    below.
+
+-   `http_port_min` and `http_port_max` (integer) - These are the minimum and
+    maximum port to use for the HTTP server started to serve the `http_directory`.
+    Because Packer often runs in parallel, Packer will choose a randomly available
+    port in this range to run the HTTP server. If you want to force the HTTP
+    server to be on one port, make this minimum and maximum port the same.
+    By default the values are 8000 and 9000, respectively.
+
+-   `iso_urls` (array of strings) - Multiple URLs for the ISO to download.
+    Packer will try these in order. If anything goes wrong attempting to download
+    or while downloading a single URL, it will move on to the next. All URLs
+    must point to the same file (same checksum). By default this is empty
+    and `iso_url` is used. Only one of `iso_url` or `iso_urls` can be specified.
+
+-   `output_directory` (string) - This is the path to the directory where the
+    resulting virtual machine will be created. This may be relative or absolute.
+    If relative, the path is relative to the working directory when `packer`
+    is executed. This directory must not exist or be empty prior to running the builder.
+    By default this is "output-BUILDNAME" where "BUILDNAME" is the name
+    of the build.
+
+-   `ram_size` (integer) - The size, in megabytes, of the ram to create
+    for the VM. By default, this is 1 GB.
+
+*   `secondary_iso_images` (array of strings) - A list of iso paths to attached to a 
+    VM when it is booted. This is most useful for unattended Windows installs, which 
+    look for an `Autounattend.xml` file on removable media. By default, no 
+    secondary iso will be attached. 
+
+-   `shutdown_command` (string) - The command to use to gracefully shut down the machine once all
+    the provisioning is done. By default this is an empty string, which tells Packer to just
+    forcefully shut down the machine unless a shutdown command takes place inside script so this may
+    safely be omitted. If one or more scripts require a reboot it is suggested to leave this blank
+    since reboots may fail and specify the final shutdown command in your last script.
+
+-   `shutdown_timeout` (string) - The amount of time to wait after executing
+    the `shutdown_command` for the virtual machine to actually shut down.
+    If it doesn't shut down in this time, it is an error. By default, the timeout
+    is "5m", or five minutes.
+
+-   `skip_compaction` (bool) - If true skip compacting the hard disk for virtual machine when
+    exporting. This defaults to false.
+
+-   `switch_name` (string) - The name of the switch to connect the virtual machine to. Be defaulting 
+    this to an empty string, Packer will try to determine the switch to use by looking for
+    external switch that is up and running.
+
+-   `switch_vlan_id` (string) - This is the vlan of the virtual switch's network card. 
+    By default none is set. If none is set then a vlan is not set on the switch's network card.
+    If this value is set it should match the vlan specified in by `vlan_id`.
+
+-   `vlan_id` (string) - This is the vlan of the virtual machine's network card for the new virtual
+    machine. By default none is set. If none is set then vlans are not set on the virtual machine's 
+    network card.
+
+-   `vm_name` (string) - This is the name of the virtual machine for the new virtual
+    machine, without the file extension. By default this is "packer-BUILDNAME",
+    where "BUILDNAME" is the name of the build.
+
+## Boot Command
+
+The `boot_command` configuration is very important: it specifies the keys
+to type when the virtual machine is first booted in order to start the
+OS installer. This command is typed after `boot_wait`, which gives the
+virtual machine some time to actually load the ISO.
+
+As documented above, the `boot_command` is an array of strings. The
+strings are all typed in sequence. It is an array only to improve readability
+within the template.
+
+The boot command is "typed" character for character over the virtual keyboard
+to the machine, simulating a human actually typing the keyboard. There are
+a set of special keys available. If these are in your boot command, they
+will be replaced by the proper key:
+
+-   `<bs>` - Backspace
+
+-   `<del>` - Delete
+
+-   `<enter>` and `<return>` - Simulates an actual "enter" or "return" keypress.
+
+-   `<esc>` - Simulates pressing the escape key.
+
+-   `<tab>` - Simulates pressing the tab key.
+
+-   `<f1>` - `<f12>` - Simulates pressing a function key.
+
+-   `<up>` `<down>` `<left>` `<right>` - Simulates pressing an arrow key.
+
+-   `<spacebar>` - Simulates pressing the spacebar.
+
+-   `<insert>` - Simulates pressing the insert key.
+
+-   `<home>` `<end>` - Simulates pressing the home and end keys.
+
+-   `<pageUp>` `<pageDown>` - Simulates pressing the page up and page down keys.
+
+-   `<leftAlt>` `<rightAlt>`  - Simulates pressing the alt key.
+
+-   `<leftCtrl>` `<rightCtrl>` - Simulates pressing the ctrl key.
+
+-   `<leftShift>` `<rightShift>` - Simulates pressing the shift key.
+
+-   `<leftAltOn>` `<rightAltOn>`  - Simulates pressing and holding the alt key.
+
+-   `<leftCtrlOn>` `<rightCtrlOn>` - Simulates pressing and holding the ctrl key. 
+
+-   `<leftShiftOn>` `<rightShiftOn>` - Simulates pressing and holding the shift key.
+
+-   `<leftAltOff>` `<rightAltOff>`  - Simulates releasing a held alt key.
+
+-   `<leftCtrlOff>` `<rightCtrlOff>` - Simulates releasing a held ctrl key.
+
+-   `<leftShiftOff>` `<rightShiftOff>` - Simulates releasing a held shift key.
+
+-   `<wait>` `<wait5>` `<wait10>` - Adds a 1, 5 or 10 second pause before
+    sending any additional keys. This is useful if you have to generally wait
+    for the UI to update before typing more.
+
+When using modifier keys `ctrl`, `alt`, `shift` ensure that you release them, otherwise they will be held down until the machine reboots. Use lowercase characters as well inside modifiers. For example: to simulate ctrl+c use `<leftCtrlOn>c<leftCtrlOff>`.    
+
+In addition to the special keys, each command to type is treated as a
+[configuration template](/docs/templates/configuration-templates.html).
+The available variables are:
+
+* `HTTPIP` and `HTTPPort` - The IP and port, respectively of an HTTP server
+  that is started serving the directory specified by the `http_directory`
+  configuration parameter. If `http_directory` isn't specified, these will
+  be blank!
+
+Example boot command. This is actually a working boot command used to start
+an Ubuntu 12.04 installer:
+
+```text
+[
+  "<esc><esc><enter><wait>",
+  "/install/vmlinuz noapic ",
+  "preseed/url=http://{{ .HTTPIP }}:{{ .HTTPPort }}/preseed.cfg ",
+  "debian-installer=en_US auto locale=en_US kbd-chooser/method=us ",
+  "hostname={{ .Name }} ",
+  "fb=false debconf/frontend=noninteractive ",
+  "keyboard-configuration/modelcode=SKIP keyboard-configuration/layout=USA ",
+  "keyboard-configuration/variant=USA console-setup/ask_detect=false ",
+  "initrd=/install/initrd.gz -- <enter>"
+]
+```
+
+## Integration Services
+
+Packer will automatically attach the integration services iso as a dvd drive
+for the version of HyperV that is running.
+
+## Generation 1 vs Generation 2
+
+Floppy drives are no longer supported by generation 2 machines. This requires you to 
+take another approach when dealing with preseed or answer files. Two possible options
+are using virtual dvd drives or using the built in web server.
+
+When dealing with Windows you need to enable UEFI drives for generation 2 virtual machines. 
+
+## Creating iso from directory
+
+Programs like mkisofs can be used to create an iso from a directory. 
+There is a [windows version of mkisofs](http://opensourcepack.blogspot.co.uk/p/cdrtools.html).
+
+Example powershell script. This is an actually working powershell script used to create a Windows answer iso:
+
+```text
+$isoFolder = "answer-iso"
+if (test-path $isoFolder){
+  remove-item $isoFolder -Force -Recurse
+}
+
+if (test-path windows\windows-2012R2-serverdatacenter-amd64\answer.iso){
+  remove-item windows\windows-2012R2-serverdatacenter-amd64\answer.iso -Force
+}
+
+mkdir $isoFolder
+
+copy windows\windows-2012R2-serverdatacenter-amd64\Autounattend.xml $isoFolder\
+copy windows\windows-2012R2-serverdatacenter-amd64\sysprep-unattend.xml $isoFolder\
+copy windows\common\set-power-config.ps1 $isoFolder\
+copy windows\common\microsoft-updates.ps1 $isoFolder\
+copy windows\common\win-updates.ps1 $isoFolder\
+copy windows\common\run-sysprep.ps1 $isoFolder\
+copy windows\common\run-sysprep.cmd $isoFolder\
+
+$textFile = "$isoFolder\Autounattend.xml" 
+
+$c = Get-Content -Encoding UTF8 $textFile
+
+# Enable UEFI and disable Non EUFI
+$c | % { $_ -replace '<!-- Start Non UEFI -->','<!-- Start Non UEFI' } | % { $_ -replace '<!-- Finish Non UEFI -->','Finish Non UEFI -->' } | % { $_ -replace '<!-- Start UEFI compatible','<!-- Start UEFI compatible -->' } | % { $_ -replace 'Finish UEFI compatible -->','<!-- Finish UEFI compatible -->' } | sc -Path $textFile
+
+& .\mkisofs.exe -r -iso-level 4 -UDF -o windows\windows-2012R2-serverdatacenter-amd64\answer.iso $isoFolder
+
+if (test-path $isoFolder){
+  remove-item $isoFolder -Force -Recurse
+}
+```
+
+
+## Example For Windows Server 2012 R2 Generation 2
+
+Packer config:
+
+```javascript
+{
+  "builders": [
+  {
+    "vm_name":"windows2012r2",
+    "type": "hyperv-iso",
+    "disk_size": 61440,
+    "floppy_files": [],
+    "secondary_iso_images": [
+      "./windows/windows-2012R2-serverdatacenter-amd64/answer.iso"
+    ],
+    "http_directory": "./windows/common/http/",
+    "boot_wait": "0s",
+    "boot_command": [
+      "a<wait>a<wait>a"
+    ],
+    "iso_url": "http://download.microsoft.com/download/6/2/A/62A76ABB-9990-4EFC-A4FE-C7D698DAEB96/9600.16384.WINBLUE_RTM.130821-1623_X64FRE_SERVER_EVAL_EN-US-IRM_SSS_X64FREE_EN-US_DV5.ISO",
+    "iso_checksum_type": "md5",
+    "iso_checksum": "458ff91f8abc21b75cb544744bf92e6a",
+    "communicator":"winrm",
+    "winrm_username": "vagrant",
+    "winrm_password": "vagrant",
+    "winrm_timeout" : "4h",
+    "shutdown_command": "f:\\run-sysprep.cmd",  
+    "ram_size": 4096,
+    "cpu": 4,
+    "generation": 2,
+    "switch_name":"LAN",
+    "enable_secure_boot":true
+  }],
+  "provisioners": [{
+    "type": "powershell",
+    "elevated_user":"vagrant",
+    "elevated_password":"vagrant",
+    "scripts": [
+      "./windows/common/install-7zip.ps1",
+      "./windows/common/install-chef.ps1",
+      "./windows/common/compile-dotnet-assemblies.ps1",
+      "./windows/common/cleanup.ps1",
+      "./windows/common/ultradefrag.ps1",
+      "./windows/common/sdelete.ps1"
+    ]
+  }],
+  "post-processors": [
+    {
+      "type": "vagrant",
+      "keep_input_artifact": false,
+      "output": "{{.Provider}}_windows-2012r2_chef.box"
+    }
+  ]
+}
+```
+
+autounattend.xml:
+
+```xml
+<?xml version="1.0" encoding="utf-8"?>
+<unattend xmlns="urn:schemas-microsoft-com:unattend">
+    <settings pass="windowsPE">
+        <component name="Microsoft-Windows-International-Core-WinPE" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <SetupUILanguage>
+                <UILanguage>en-US</UILanguage>
+            </SetupUILanguage>
+            <InputLocale>en-US</InputLocale>
+            <SystemLocale>en-US</SystemLocale>
+            <UILanguage>en-US</UILanguage>
+            <UILanguageFallback>en-US</UILanguageFallback>
+            <UserLocale>en-US</UserLocale>
+        </component>
+        <component name="Microsoft-Windows-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <!-- Start Non UEFI -->
+            <DiskConfiguration>
+                <Disk wcm:action="add">
+                    <CreatePartitions>
+                        <CreatePartition wcm:action="add">
+                            <Type>Primary</Type>
+                            <Order>1</Order>
+                            <Size>350</Size>
+                        </CreatePartition>
+                        <CreatePartition wcm:action="add">
+                            <Order>2</Order>
+                            <Type>Primary</Type>
+                            <Extend>true</Extend>
+                        </CreatePartition>
+                    </CreatePartitions>
+                    <ModifyPartitions>
+                        <ModifyPartition wcm:action="add">
+                            <Active>true</Active>
+                            <Format>NTFS</Format>
+                            <Label>boot</Label>
+                            <Order>1</Order>
+                            <PartitionID>1</PartitionID>
+                        </ModifyPartition>
+                        <ModifyPartition wcm:action="add">
+                            <Format>NTFS</Format>
+                            <Label>Windows 2012 R2</Label>
+                            <Letter>C</Letter>
+                            <Order>2</Order>
+                            <PartitionID>2</PartitionID>
+                        </ModifyPartition>
+                    </ModifyPartitions>
+                    <DiskID>0</DiskID>
+                    <WillWipeDisk>true</WillWipeDisk>
+                </Disk>
+            </DiskConfiguration>
+            <ImageInstall>
+                <OSImage>
+                    <InstallFrom>
+                        <MetaData wcm:action="add">
+                            <Key>/IMAGE/NAME </Key>
+                            <Value>Windows Server 2012 R2 SERVERSTANDARD</Value>
+                        </MetaData>
+                    </InstallFrom>
+                    <InstallTo>
+                        <DiskID>0</DiskID>
+                        <PartitionID>2</PartitionID>
+                    </InstallTo>
+                </OSImage>
+            </ImageInstall>
+            <!-- Finish Non UEFI -->
+            <!-- Start UEFI compatible
+            <DiskConfiguration>
+                <Disk wcm:action="add">
+                    <CreatePartitions>
+                        <CreatePartition wcm:action="add">
+                            <Order>1</Order>
+                            <Size>300</Size>
+                            <Type>Primary</Type>
+                        </CreatePartition>
+                        <CreatePartition wcm:action="add">
+                            <Order>2</Order>
+                            <Size>100</Size>
+                            <Type>EFI</Type>
+                        </CreatePartition>
+                        <CreatePartition wcm:action="add">
+                            <Order>3</Order>
+                            <Size>128</Size>
+                            <Type>MSR</Type>
+                        </CreatePartition>         
+                        <CreatePartition wcm:action="add">
+                            <Order>4</Order>
+                            <Extend>true</Extend> 
+                            <Type>Primary</Type>
+                        </CreatePartition>
+                    </CreatePartitions>
+                    <ModifyPartitions>
+                        <ModifyPartition wcm:action="add">
+                            <Order>1</Order>
+                            <PartitionID>1</PartitionID>
+                            <Label>WINRE</Label>
+                            <Format>NTFS</Format>
+                            <TypeID>de94bba4-06d1-4d40-a16a-bfd50179d6ac</TypeID>
+                        </ModifyPartition>
+                        <ModifyPartition wcm:action="add">
+                            <Order>2</Order>
+                            <PartitionID>2</PartitionID>
+                            <Label>System</Label>
+                            <Format>FAT32</Format>
+                        </ModifyPartition>
+                        <ModifyPartition wcm:action="add">
+                            <Order>3</Order>
+                            <PartitionID>3</PartitionID>
+                        </ModifyPartition>
+                        <ModifyPartition wcm:action="add">
+                            <Order>4</Order>
+                            <PartitionID>4</PartitionID>
+                            <Label>Windows</Label>
+                            <Format>NTFS</Format>
+                        </ModifyPartition>
+                    </ModifyPartitions>
+                    <DiskID>0</DiskID>
+                    <WillWipeDisk>true</WillWipeDisk>
+                </Disk>
+                <WillShowUI>OnError</WillShowUI>
+            </DiskConfiguration>
+            <ImageInstall>
+                <OSImage>
+                    <InstallFrom>
+                        <MetaData wcm:action="add">
+                            <Key>/IMAGE/NAME </Key>
+                            <Value>Windows Server 2012 R2 SERVERSTANDARD</Value>
+                        </MetaData>
+                    </InstallFrom>
+                    <InstallTo>
+                        <DiskID>0</DiskID>
+                        <PartitionID>4</PartitionID>
+                    </InstallTo>
+                </OSImage>
+            </ImageInstall>
+            Finish UEFI compatible -->
+            <UserData>
+                <!-- Product Key from http://technet.microsoft.com/en-us/library/jj612867.aspx -->
+                <ProductKey>
+                    <!-- Do not uncomment the Key element if you are using trial ISOs -->
+                    <!-- You must uncomment the Key element (and optionally insert your own key) if you are using retail or volume license ISOs -->
+                    <!--<Key>D2N9P-3P6X9-2R39C-7RTCD-MDVJX</Key>-->
+                    <WillShowUI>OnError</WillShowUI>
+                </ProductKey>
+                <AcceptEula>true</AcceptEula>
+                <FullName>Vagrant</FullName>
+                <Organization>Vagrant</Organization>
+            </UserData>
+        </component>
+    </settings>
+    <settings pass="specialize">
+        <component name="Microsoft-Windows-Shell-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <OEMInformation>
+                <HelpCustomized>false</HelpCustomized>
+            </OEMInformation>
+            <ComputerName>vagrant-2012r2</ComputerName>
+            <TimeZone>Coordinated Universal Time</TimeZone>
+            <RegisteredOwner />
+        </component>
+        <component name="Microsoft-Windows-ServerManager-SvrMgrNc" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <DoNotOpenServerManagerAtLogon>true</DoNotOpenServerManagerAtLogon>
+        </component>
+        <component name="Microsoft-Windows-IE-ESC" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <IEHardenAdmin>false</IEHardenAdmin>
+            <IEHardenUser>false</IEHardenUser>
+        </component>
+        <component name="Microsoft-Windows-OutOfBoxExperience" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <DoNotOpenInitialConfigurationTasksAtLogon>true</DoNotOpenInitialConfigurationTasksAtLogon>
+        </component>
+        <component name="Microsoft-Windows-Security-SPP-UX" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <SkipAutoActivation>true</SkipAutoActivation>
+        </component>
+    </settings>
+    <settings pass="oobeSystem">
+<!-- Start Setup cache proxy during installation
+        <component name="Microsoft-Windows-IE-ClientNetworkProtocolImplementation" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <POLICYProxySettingsPerUser>0</POLICYProxySettingsPerUser>
+            <HKLMProxyEnable>true</HKLMProxyEnable>
+            <HKLMProxyServer>cache-proxy:3142</HKLMProxyServer>
+        </component>  
+Finish Setup cache proxy during installation --> 
+        <component name="Microsoft-Windows-Shell-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <AutoLogon>
+                <Password>
+                    <Value>vagrant</Value>
+                    <PlainText>true</PlainText>
+                </Password>
+                <Enabled>true</Enabled>
+                <Username>vagrant</Username>
+            </AutoLogon>
+            <FirstLogonCommands>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c powershell -Command "Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Force"</CommandLine>
+                    <Description>Set Execution Policy 64 Bit</Description>
+                    <Order>1</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>C:\Windows\SysWOW64\cmd.exe /c powershell -Command "Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Force"</CommandLine>
+                    <Description>Set Execution Policy 32 Bit</Description>
+                    <Order>2</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm quickconfig -q</CommandLine>
+                    <Description>winrm quickconfig -q</Description>
+                    <Order>3</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm quickconfig -transport:http</CommandLine>
+                    <Description>winrm quickconfig -transport:http</Description>
+                    <Order>4</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config @{MaxTimeoutms="1800000"}</CommandLine>
+                    <Description>Win RM MaxTimoutms</Description>
+                    <Order>5</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/winrs @{MaxMemoryPerShellMB="300"}</CommandLine>
+                    <Description>Win RM MaxMemoryPerShellMB</Description>
+                    <Order>6</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/service @{AllowUnencrypted="true"}</CommandLine>
+                    <Description>Win RM AllowUnencrypted</Description>
+                    <Order>7</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/service/auth @{Basic="true"}</CommandLine>
+                    <Description>Win RM auth Basic</Description>
+                    <Order>8</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/client/auth @{Basic="true"}</CommandLine>
+                    <Description>Win RM client auth Basic</Description>
+                    <Order>9</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/listener?Address=*+Transport=HTTP @{Port="5985"} </CommandLine>
+                    <Description>Win RM listener Address/Port</Description>
+                    <Order>10</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c netsh advfirewall firewall set rule group="remote administration" new enable=yes </CommandLine>
+                    <Description>Win RM adv firewall enable</Description>
+                    <Order>11</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c netsh advfirewall firewall add rule name="WinRM 5985" protocol=TCP dir=in localport=5985 action=allow</CommandLine>
+                    <Description>Win RM port open</Description>
+                    <Order>12</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c netsh advfirewall firewall add rule name="WinRM 5986" protocol=TCP dir=in localport=5986 action=allow</CommandLine>
+                    <Description>Win RM port open</Description>
+                    <Order>13</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c net stop winrm </CommandLine>
+                    <Description>Stop Win RM Service </Description>
+                    <Order>14</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c sc config winrm start= disabled</CommandLine>
+                    <Description>Win RM Autostart</Description>
+                    <Order>15</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ /v HideFileExt /t REG_DWORD /d 0 /f</CommandLine>
+                    <Order>16</Order>
+                    <Description>Show file extensions in Explorer</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKCU\Console /v QuickEdit /t REG_DWORD /d 1 /f</CommandLine>
+                    <Order>17</Order>
+                    <Description>Enable QuickEdit mode</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ /v Start_ShowRun /t REG_DWORD /d 1 /f</CommandLine>
+                    <Order>18</Order>
+                    <Description>Show Run command in Start Menu</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ /v StartMenuAdminTools /t REG_DWORD /d 1 /f</CommandLine>
+                    <Order>19</Order>
+                    <Description>Show Administrative Tools in Start Menu</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKLM\SYSTEM\CurrentControlSet\Control\Power\ /v HibernateFileSizePercent /t REG_DWORD /d 0 /f</CommandLine>
+                    <Order>20</Order>
+                    <Description>Zero Hibernation File</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD HKLM\SYSTEM\CurrentControlSet\Control\Power\ /v HibernateEnabled /t REG_DWORD /d 0 /f</CommandLine>
+                    <Order>21</Order>
+                    <Description>Disable Hibernation Mode</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c wmic useraccount where "name='vagrant'" set PasswordExpires=FALSE</CommandLine>
+                    <Order>22</Order>
+                    <Description>Disable password expiration for vagrant user</Description>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/winrs @{MaxShellsPerUser="30"}</CommandLine>
+                    <Description>Win RM MaxShellsPerUser</Description>
+                    <Order>23</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c winrm set winrm/config/winrs @{MaxProcessesPerShell="25"}</CommandLine>
+                    <Description>Win RM MaxProcessesPerShell</Description>
+                    <Order>24</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>%SystemRoot%\System32\reg.exe ADD "HKLM\System\CurrentControlSet\Services\Netlogon\Parameters" /v DisablePasswordChange /t REG_DWORD /d 1 /f</CommandLine>
+                    <Description>Turn off computer password</Description>
+                    <Order>25</Order>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c netsh advfirewall firewall add rule name="ICMP Allow incoming V4 echo request" protocol=icmpv4:8,any dir=in action=allow</CommandLine>
+                    <Description>ICMP open for ping</Description>
+                    <Order>26</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <!-- WITH WINDOWS UPDATES -->
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c IF EXIST a:\set-power-config.ps1 (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File a:\set-power-config.ps1) ELSE (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File f:\set-power-config.ps1)</CommandLine>
+                    <Order>97</Order>
+                    <Description>Turn off all power saving and timeouts</Description>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c IF EXIST a:\microsoft-updates.ps1 (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File a:\microsoft-updates.ps1) ELSE (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File f:\microsoft-updates.ps1)</CommandLine>
+                    <Order>98</Order>
+                    <Description>Enable Microsoft Updates</Description>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <SynchronousCommand wcm:action="add">
+                    <CommandLine>cmd.exe /c IF EXIST a:\win-updates.ps1 (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File a:\win-updates.ps1) ELSE (C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -File f:\win-updates.ps1)</CommandLine>
+                    <Description>Install Windows Updates</Description>
+                    <Order>100</Order>
+                    <RequiresUserInput>true</RequiresUserInput>
+                </SynchronousCommand>
+                <!-- END WITH WINDOWS UPDATES -->
+            </FirstLogonCommands>
+            <OOBE>
+                <HideEULAPage>true</HideEULAPage>
+                <HideLocalAccountScreen>true</HideLocalAccountScreen>
+                <HideOEMRegistrationScreen>true</HideOEMRegistrationScreen>
+                <HideOnlineAccountScreens>true</HideOnlineAccountScreens>
+                <HideWirelessSetupInOOBE>true</HideWirelessSetupInOOBE>
+                <NetworkLocation>Work</NetworkLocation>
+                <ProtectYourPC>1</ProtectYourPC>
+            </OOBE>
+            <UserAccounts>
+                <AdministratorPassword>
+                    <Value>vagrant</Value>
+                    <PlainText>true</PlainText>
+                </AdministratorPassword>
+                <LocalAccounts>
+                    <LocalAccount wcm:action="add">
+                        <Password>
+                            <Value>vagrant</Value>
+                            <PlainText>true</PlainText>
+                        </Password>
+                        <Group>administrators</Group>
+                        <DisplayName>Vagrant</DisplayName>
+                        <Name>vagrant</Name>
+                        <Description>Vagrant User</Description>
+                    </LocalAccount>
+                </LocalAccounts>
+            </UserAccounts>
+            <RegisteredOwner />
+            <TimeZone>Coordinated Universal Time</TimeZone>
+        </component>
+    </settings>
+    <settings pass="offlineServicing">
+        <component name="Microsoft-Windows-LUA-Settings" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <EnableLUA>false</EnableLUA>
+        </component>
+    </settings>
+    <cpi:offlineImage cpi:source="wim:c:/projects/baseboxes/9600.16384.winblue_rtm.130821-1623_x64fre_server_eval_en-us-irm_sss_x64free_en-us_dv5_slipstream/sources/install.wim#Windows Server 2012 R2 SERVERDATACENTER" xmlns:cpi="urn:schemas-microsoft-com:cpi" />
+</unattend>
+
+```
+
+sysprep-unattend.xml:
+
+```text
+<?xml version="1.0" encoding="utf-8"?>
+<unattend xmlns="urn:schemas-microsoft-com:unattend">
+    <settings pass="generalize">
+        <component language="neutral" name="Microsoft-Windows-Security-SPP" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <SkipRearm>1</SkipRearm>
+        </component>
+    </settings>
+    <settings pass="oobeSystem">
+<!-- Setup proxy after sysprep 
+       <component name="Microsoft-Windows-IE-ClientNetworkProtocolImplementation" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" language="neutral" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <POLICYProxySettingsPerUser>1</POLICYProxySettingsPerUser>
+            <HKLMProxyEnable>false</HKLMProxyEnable>
+            <HKLMProxyServer>cache-proxy:3142</HKLMProxyServer>
+        </component>
+Finish proxy after sysprep -->  
+        <component language="neutral" name="Microsoft-Windows-International-Core" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <InputLocale>0809:00000809</InputLocale>
+            <SystemLocale>en-GB</SystemLocale>
+            <UILanguage>en-US</UILanguage>
+            <UILanguageFallback>en-US</UILanguageFallback>
+            <UserLocale>en-GB</UserLocale>
+        </component>
+        <component language="neutral" name="Microsoft-Windows-Shell-Setup" processorArchitecture="amd64" publicKeyToken="31bf3856ad364e35" versionScope="nonSxS" xmlns:wcm="http://schemas.microsoft.com/WMIConfig/2002/State" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+            <OOBE>
+                <HideEULAPage>true</HideEULAPage>
+                <HideOEMRegistrationScreen>true</HideOEMRegistrationScreen>
+                <HideOnlineAccountScreens>true</HideOnlineAccountScreens>
+                <HideWirelessSetupInOOBE>true</HideWirelessSetupInOOBE>
+                <NetworkLocation>Work</NetworkLocation>
+                <ProtectYourPC>1</ProtectYourPC>
+                <SkipUserOOBE>true</SkipUserOOBE>
+                <SkipMachineOOBE>true</SkipMachineOOBE>
+            </OOBE>
+            <UserAccounts>
+                <AdministratorPassword>
+                    <Value>vagrant</Value>
+                    <PlainText>true</PlainText>
+                </AdministratorPassword>
+                <LocalAccounts>
+                    <LocalAccount wcm:action="add">
+                        <Password>
+                            <Value>vagrant</Value>
+                            <PlainText>true</PlainText>
+                        </Password>
+                        <Group>administrators</Group>
+                        <DisplayName>Vagrant</DisplayName>
+                        <Name>vagrant</Name>
+                        <Description>Vagrant User</Description>
+                    </LocalAccount>
+                </LocalAccounts>
+            </UserAccounts>
+            <DisableAutoDaylightTimeSet>true</DisableAutoDaylightTimeSet>
+            <TimeZone>Coordinated Universal Time</TimeZone>
+            <VisualEffects>
+                <SystemDefaultBackgroundColor>2</SystemDefaultBackgroundColor>
+            </VisualEffects>
+        </component>
+    </settings>
+</unattend>
+```
+
+## Example For Ubuntu Vivid Generation 2
+
+Packer config:
+
+```javascript
+{
+  "builders": [
+  {
+    "vm_name":"ubuntu-vivid",
+    "type": "hyperv-iso",
+    "disk_size": 61440,
+    "iso_url": "http://releases.ubuntu.com/15.04/ubuntu-15.04-server-amd64.iso",
+    "iso_checksum_type": "sha1",
+    "iso_checksum": "D10248965C2C749DF6BCCE9F2F90F16A2E75E843",
+    "communicator":"ssh",
+    "ssh_username": "vagrant",
+    "ssh_password": "vagrant",
+    "ssh_timeout" : "4h",
+    "http_directory": "./linux/ubuntu/http/",
+    "boot_wait": "5s",
+    "boot_command": [
+      "<esc><esc><enter><wait>",
+      "/install/vmlinuz ",
+      "preseed/url=http://{{.HTTPIP}}:{{.HTTPPort}}/preseed.cfg ",
+      "debian-installer=en_US auto locale=en_US kbd-chooser/method=us ",
+      "hostname={{.Name}} ",
+      "fb=false debconf/frontend=noninteractive ",
+      "keyboard-configuration/modelcode=SKIP keyboard-configuration/layout=USA ",
+      "keyboard-configuration/variant=USA console-setup/ask_detect=false ",
+      "initrd=/install/initrd.gz -- <enter>"
+    ],
+    "shutdown_command": "echo 'vagrant' | sudo -S -E shutdown -P now",
+    "ram_size": 4096,
+    "cpu": 4,
+    "generation": 1,
+    "switch_name":"LAN"
+  }],
+  "provisioners": [{
+    "type": "shell",
+    "execute_command": "echo 'vagrant' | sudo -S -E sh {{.Path}}",
+    "scripts": [
+      "./linux/ubuntu/update.sh",
+      "./linux/ubuntu/network.sh",
+      "./linux/common/vagrant.sh",
+      "./linux/common/chef.sh",
+      "./linux/common/motd.sh",
+      "./linux/ubuntu/cleanup.sh"
+    ]
+  }],
+  "post-processors": [
+    {
+      "type": "vagrant",
+      "keep_input_artifact": true,
+      "output": "{{.Provider}}_ubuntu-15.04_chef.box"
+    }
+  ]
+}
+```
+
+preseed.cfg:
+
+```text
+## Options to set on the command line
+d-i debian-installer/locale string en_US.utf8
+d-i console-setup/ask_detect boolean false
+d-i console-setup/layout string us
+
+d-i netcfg/get_hostname string unassigned-hostname
+d-i netcfg/get_domain string unassigned-domain
+
+d-i time/zone string UTC
+d-i clock-setup/utc-auto boolean true
+d-i clock-setup/utc boolean true
+
+d-i kbd-chooser/method select American English
+
+d-i netcfg/wireless_wep string
+
+d-i base-installer/kernel/override-image string linux-server
+
+d-i debconf debconf/frontend select Noninteractive
+
+d-i pkgsel/install-language-support boolean false
+tasksel tasksel/first multiselect standard, ubuntu-server
+
+d-i partman-auto/method string lvm
+
+d-i partman-lvm/confirm boolean true
+d-i partman-lvm/device_remove_lvm boolean true
+d-i partman-auto/choose_recipe select atomic
+
+d-i partman/confirm_write_new_label boolean true
+d-i partman/confirm_nooverwrite boolean true
+d-i partman/choose_partition select finish
+d-i partman/confirm boolean true
+
+# Write the changes to disks and configure LVM?
+d-i partman-lvm/confirm boolean true
+d-i partman-lvm/confirm_nooverwrite boolean true
+d-i partman-auto-lvm/guided_size string max
+
+# Default user
+d-i passwd/user-fullname string vagrant
+d-i passwd/username string vagrant
+d-i passwd/user-password password vagrant
+d-i passwd/user-password-again password vagrant
+d-i user-setup/encrypt-home boolean false
+d-i user-setup/allow-password-weak boolean true
+
+# Minimum packages (see postinstall.sh)
+d-i pkgsel/include string openssh-server ntp
+
+# Upgrade packages after debootstrap? (none, safe-upgrade, full-upgrade)
+# (note: set to none for speed)
+d-i pkgsel/upgrade select none
+
+d-i grub-installer/only_debian boolean true
+d-i grub-installer/with_other_os boolean true
+d-i finish-install/reboot_in_progress note
+
+d-i pkgsel/update-policy select none
+
+choose-mirror-bin mirror/http/proxy string
+
+#d-i mirror/http/proxy string http://apt-cacher:3142/
+```

website/source/docs/builders/hyperv.html.markdown

@@ -0,0 +1,18 @@
+---
+layout: "docs"
+page_title: "HyperV Builder"
+description: |-
+  The HyperV Packer builder is able to create HyperV virtual machines and export them.
+---
+
+# HyperV Builder
+
+The HyperV Packer builder is able to create [HyperV](https://www.microsoft.com/en-us/server-cloud/solutions/virtualization.aspx)
+virtual machines and export them.
+
+Packer currently only support building HyperV machines with an iso:
+
+* [hyperv-iso](/docs/builders/hyperv-iso.html) - Starts from
+  an ISO file, creates a brand new HyperV VM, installs an OS,
+  provisions software within the OS, then exports that machine to create
+  an image. This is best for people who want to start from scratch.