packer-cn/builder/virtualbox/driver.go

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package virtualbox
import (
"bytes"
"fmt"
"log"
"os/exec"
"regexp"
"strings"
"time"
)
// A driver is able to talk to VirtualBox and perform certain
// operations with it.
type Driver interface {
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// Checks if the VM with the given name is running.
IsRunning(string) (bool, error)
// Stop stops a running machine, forcefully.
Stop(string) error
// SuppressMessages should do what needs to be done in order to
// suppress any annoying popups from VirtualBox.
SuppressMessages() error
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// VBoxManage executes the given VBoxManage command
VBoxManage(...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
// Version reads the version of VirtualBox that is installed.
Version() (string, error)
}
type VBox42Driver struct {
// This is the path to the "VBoxManage" application.
VBoxManagePath string
}
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func (d *VBox42Driver) IsRunning(name string) (bool, error) {
var stdout bytes.Buffer
cmd := exec.Command(d.VBoxManagePath, "showvminfo", name, "--machinereadable")
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return false, err
}
for _, line := range strings.Split(stdout.String(), "\n") {
if line == `VMState="running"` {
return true, nil
}
// We consider "stopping" to still be running. We wait for it to
// be completely stopped or some other state.
if line == `VMState="stopping"` {
return true, nil
}
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}
return false, nil
}
func (d *VBox42Driver) Stop(name string) error {
if err := d.VBoxManage("controlvm", name, "poweroff"); err != nil {
return err
}
return nil
}
func (d *VBox42Driver) SuppressMessages() error {
extraData := map[string]string{
"GUI/RegistrationData": "triesLeft=0",
"GUI/SuppressMessages": "confirmInputCapture,remindAboutAutoCapture,remindAboutMouseIntegrationOff,remindAboutMouseIntegrationOn,remindAboutWrongColorDepth",
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"GUI/UpdateDate": fmt.Sprintf("1 d, %d-01-01, stable", time.Now().Year()+1),
"GUI/UpdateCheckCount": "60",
}
for k, v := range extraData {
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if err := d.VBoxManage("setextradata", "global", k, v); err != nil {
return err
}
}
return nil
}
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func (d *VBox42Driver) VBoxManage(args ...string) error {
var stdout, stderr bytes.Buffer
log.Printf("Executing VBoxManage: %#v", args)
cmd := exec.Command(d.VBoxManagePath, args...)
cmd.Stdout = &stdout
cmd.Stderr = &stderr
err := cmd.Run()
stdoutString := strings.TrimSpace(stdout.String())
stderrString := strings.TrimSpace(stderr.String())
if _, ok := err.(*exec.ExitError); ok {
err = fmt.Errorf("VBoxManage error: %s", stderrString)
}
log.Printf("stdout: %s", stdoutString)
log.Printf("stderr: %s", stderrString)
return err
}
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func (d *VBox42Driver) Verify() error {
return nil
}
func (d *VBox42Driver) Version() (string, error) {
var stdout bytes.Buffer
cmd := exec.Command(d.VBoxManagePath, "--version")
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return "", err
}
versionRe := regexp.MustCompile("[^.0-9]")
matches := versionRe.Split(stdout.String(), 2)
if len(matches) == 0 {
return "", fmt.Errorf("No version found: %s", stdout.String())
}
return matches[0], nil
}