(2) Implement datasources (#10440)

cmd/packer-plugin-check/main.go

@@ -12,7 +12,6 @@ import (
 	"strings"
 
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
-	"github.com/hashicorp/packer/packer"
 	"github.com/hashicorp/packer/packer/plugin"
 )
 
@@ -130,22 +129,23 @@ func discoverAndLoad() error {
 	}
 
 	// TODO: validate correctness of plugins loaded by checking them against the output of the `describe` command.
-	builders, provisioners, postProcessors := config.GetPlugins()
-	if len(builders) == 0 &&
-		len(provisioners) == 0 &&
-		len(postProcessors) == 0 {
-		return fmt.Errorf("couldn't load any Builder/Provisioner/Post-Processor from the plugin binary")
+	plugins := config.GetPlugins()
+	if len(plugins.Builders) == 0 &&
+		len(plugins.Provisioners) == 0 &&
+		len(plugins.PostProcessors) == 0 &&
+		len(plugins.DataSources) == 0 {
+		return fmt.Errorf("couldn't load any Builder/Provisioner/Post-Processor/Datasource from the plugin binary")
 	}
 
-	return checkHCL2ConfigSpec(builders, provisioners, postProcessors)
+	return checkHCL2ConfigSpec(plugins)
 }
 
 // checkHCL2ConfigSpec checks if the hcl2spec config is present for the given plugins by validating that ConfigSpec() does not
 // return an empty map of specs.
-func checkHCL2ConfigSpec(builders packer.BuilderStore, provisioners packer.ProvisionerStore, postProcessors packer.PostProcessorStore) error {
+func checkHCL2ConfigSpec(plugins plugin.Plugins) error {
 	var errs *packersdk.MultiError
-	for _, b := range builders.List() {
-		builder, err := builders.Start(b)
+	for _, b := range plugins.Builders.List() {
+		builder, err := plugins.Builders.Start(b)
 		if err != nil {
 			return packersdk.MultiErrorAppend(err, errs)
 		}
@@ -153,8 +153,8 @@ func checkHCL2ConfigSpec(builders packer.BuilderStore, provisioners packer.Provi
 			errs = packersdk.MultiErrorAppend(fmt.Errorf("builder %q does not contain the required hcl2spec configuration", b), errs)
 		}
 	}
-	for _, p := range provisioners.List() {
-		provisioner, err := provisioners.Start(p)
+	for _, p := range plugins.Provisioners.List() {
+		provisioner, err := plugins.Provisioners.Start(p)
 		if err != nil {
 			return packersdk.MultiErrorAppend(err, errs)
 		}
@@ -162,8 +162,8 @@ func checkHCL2ConfigSpec(builders packer.BuilderStore, provisioners packer.Provi
 			errs = packersdk.MultiErrorAppend(fmt.Errorf("provisioner %q does not contain the required hcl2spec configuration", p), errs)
 		}
 	}
-	for _, pp := range postProcessors.List() {
-		postProcessor, err := postProcessors.Start(pp)
+	for _, pp := range plugins.PostProcessors.List() {
+		postProcessor, err := plugins.PostProcessors.Start(pp)
 		if err != nil {
 			return packersdk.MultiErrorAppend(err, errs)
 		}
@@ -171,6 +171,15 @@ func checkHCL2ConfigSpec(builders packer.BuilderStore, provisioners packer.Provi
 			errs = packersdk.MultiErrorAppend(fmt.Errorf("post-processor %q does not contain the required hcl2spec configuration", pp), errs)
 		}
 	}
+	for _, d := range plugins.DataSources.List() {
+		datasource, err := plugins.DataSources.Start(d)
+		if err != nil {
+			return packersdk.MultiErrorAppend(err, errs)
+		}
+		if len(datasource.ConfigSpec()) == 0 {
+			errs = packersdk.MultiErrorAppend(fmt.Errorf("datasource %q does not contain the required hcl2spec configuration", d), errs)
+		}
+	}
 	if errs != nil && len(errs.Errors) > 0 {
 		return errs
 	}

command/build.go

@@ -70,6 +70,7 @@ func (m *Meta) GetConfigFromHCL(cla *MetaArgs) (*hcl2template.PackerConfig, int)
 		BuilderSchemas:          m.CoreConfig.Components.BuilderStore,
 		ProvisionersSchemas:     m.CoreConfig.Components.ProvisionerStore,
 		PostProcessorsSchemas:   m.CoreConfig.Components.PostProcessorStore,
+		DatasourceSchemas:       m.CoreConfig.Components.DatasourceStore,
 	}
 	cfg, diags := parser.Parse(cla.Path, cla.VarFiles, cla.Vars)
 	return cfg, writeDiags(m.Ui, parser.Files(), diags)
@@ -147,7 +148,7 @@ func (c *BuildCommand) RunContext(buildCtx context.Context, cla *BuildArgs) int
 	if ret != 0 {
 		return ret
 	}
-	diags := packerStarter.Initialize()
+	diags := packerStarter.Initialize(packer.InitializeOptions{})
 	ret = writeDiags(c.Ui, nil, diags)
 	if ret != 0 {
 		return ret

command/build_test.go

@@ -371,6 +371,17 @@ func TestBuild(t *testing.T) {
 			},
 			expectedCode: 1,
 		},
+		{
+			name: "hcl - execute and use datasource",
+			args: []string{
+				testFixture("hcl", "datasource.pkr.hcl"),
+			},
+			fileCheck: fileCheck{
+				expectedContent: map[string]string{
+					"chocolate.txt": "chocolate",
+				},
+			},
+		},
 	}
 
 	for _, tt := range tc {
@@ -849,6 +860,9 @@ func testCoreConfigBuilder(t *testing.T) *packer.CoreConfig {
 			"shell-local": func() (packersdk.PostProcessor, error) { return &shell_local_pp.PostProcessor{}, nil },
 			"manifest":    func() (packersdk.PostProcessor, error) { return &manifest.PostProcessor{}, nil },
 		},
+		DatasourceStore: packersdk.MapOfDatasource{
+			"mock": func() (packersdk.Datasource, error) { return &packersdk.MockDatasource{}, nil },
+		},
 	}
 	return &packer.CoreConfig{
 		Components: components,

command/console.go

@@ -60,7 +60,7 @@ func (c *ConsoleCommand) RunContext(ctx context.Context, cla *ConsoleArgs) int {
 		return ret
 	}
 
-	_ = packerStarter.Initialize()
+	_ = packerStarter.Initialize(packer.InitializeOptions{})
 
 	// Determine if stdin is a pipe. If so, we evaluate directly.
 	if c.StdinPiped() {

command/core_wrapper.go

@@ -11,7 +11,7 @@ type CoreWrapper struct {
 	*packer.Core
 }
 
-func (c *CoreWrapper) Initialize() hcl.Diagnostics {
+func (c *CoreWrapper) Initialize(_ packer.InitializeOptions) hcl.Diagnostics {
 	err := c.Core.Initialize()
 	if err != nil {
 		return hcl.Diagnostics{

command/hcl2_upgrade.go

@@ -13,8 +13,8 @@ import (
 	texttemplate "text/template"
 
 	"github.com/hashicorp/hcl/v2/hclwrite"
+	hcl2shim "github.com/hashicorp/packer-plugin-sdk/hcl2helper"
 	"github.com/hashicorp/packer-plugin-sdk/template"
-	hcl2shim "github.com/hashicorp/packer/hcl2template/shim"
 	"github.com/mitchellh/mapstructure"
 	"github.com/posener/complete"
 	"github.com/zclconf/go-cty/cty"

command/inspect.go

@@ -46,7 +46,7 @@ func (c *InspectCommand) RunContext(ctx context.Context, cla *InspectArgs) int {
 	}
 
 	// here we ignore init diags to allow unknown variables to be used
-	_ = packerStarter.Initialize()
+	_ = packerStarter.Initialize(packer.InitializeOptions{})
 
 	return packerStarter.InspectConfig(packer.InspectConfigOptions{
 		Ui: c.Ui,

command/plugin.go

@@ -212,7 +212,9 @@ var PostProcessors = map[string]packersdk.PostProcessor{
 	"yandex-import":        new(yandeximportpostprocessor.PostProcessor),
 }
 
-var pluginRegexp = regexp.MustCompile("packer-(builder|post-processor|provisioner)-(.+)")
+var Datasources = map[string]packersdk.Datasource{}
+
+var pluginRegexp = regexp.MustCompile("packer-(builder|post-processor|provisioner|datasource)-(.+)")
 
 func (c *PluginCommand) Run(args []string) int {
 	// This is an internal call (users should not call this directly) so we're
@@ -261,6 +263,13 @@ func (c *PluginCommand) Run(args []string) int {
 			return 1
 		}
 		server.RegisterPostProcessor(postProcessor)
+	case "datasource":
+		datasource, found := Datasources[pluginName]
+		if !found {
+			c.Ui.Error(fmt.Sprintf("Could not load datasource: %s", pluginName))
+			return 1
+		}
+		server.RegisterDatasource(datasource)
 	}
 
 	server.Serve()

command/test-fixtures/hcl/datasource.pkr.hcl

@@ -0,0 +1,14 @@
+data "mock" "content" {
+  foo = "chocolate"
+}
+
+source "file" "chocolate" {
+  content = data.mock.content.foo
+  target = "chocolate.txt"
+}
+
+build {
+  sources = [
+    "sources.file.chocolate",
+  ]
+}

command/test-fixtures/validate/datasource.pkr.hcl

@@ -0,0 +1,16 @@
+packer {
+  required_version = ">= v1.0.0"
+}
+
+data "mock" "content" {
+  foo = "content"
+}
+
+source "file" "chocolate" {
+  target = "chocolate.txt"
+  content = data.mock.content.foo
+}
+
+build {
+  sources = ["source.file.chocolate"]
+}

command/validate.go

@@ -56,7 +56,9 @@ func (c *ValidateCommand) RunContext(ctx context.Context, cla *ValidateArgs) int
 		return 0
 	}
 
-	diags := packerStarter.Initialize()
+	diags := packerStarter.Initialize(packer.InitializeOptions{
+		SkipDatasourcesExecution: true,
+	})
 	ret = writeDiags(c.Ui, nil, diags)
 	if ret != 0 {
 		return ret

command/validate_test.go

@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/google/go-cmp/cmp"
+	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 )
 
 func TestValidateCommand(t *testing.T) {
@@ -45,6 +46,29 @@ func TestValidateCommand(t *testing.T) {
 	}
 }
 
+func TestValidateCommand_SkipDatasourceExecution(t *testing.T) {
+	datasourceMock := &packersdk.MockDatasource{}
+	meta := testMetaFile(t)
+	meta.CoreConfig.Components.DatasourceStore = packersdk.MapOfDatasource{
+		"mock": func() (packersdk.Datasource, error) {
+			return datasourceMock, nil
+		},
+	}
+	c := &ValidateCommand{
+		Meta: meta,
+	}
+	args := []string{filepath.Join(testFixture("validate"), "datasource.pkr.hcl")}
+	if code := c.Run(args); code != 0 {
+		fatalCommand(t, c.Meta)
+	}
+	if datasourceMock.ExecuteCalled {
+		t.Fatalf("Datasource should not be executed on validation")
+	}
+	if !datasourceMock.OutputSpecCalled {
+		t.Fatalf("Datasource OutPutSpec should be called on validation")
+	}
+}
+
 func TestValidateCommand_SyntaxOnly(t *testing.T) {
 	tt := []struct {
 		path     string

config.go

@@ -30,6 +30,7 @@ type config struct {
 	Builders                   packer.MapOfBuilder       `json:"-"`
 	Provisioners               packer.MapOfProvisioner   `json:"-"`
 	PostProcessors             packer.MapOfPostProcessor `json:"-"`
+	Datasources                packer.MapOfDatasource    `json:"-"`
 	Plugins                    plugin.Config
 }
 
@@ -186,5 +187,17 @@ func (c *config) discoverInternalComponents() error {
 		}
 	}
 
+	for dataSource := range command.Datasources {
+		dataSource := dataSource
+		_, found := (c.Datasources)[dataSource]
+		if !found {
+			c.Datasources[dataSource] = func() (packersdk.Datasource, error) {
+				bin := fmt.Sprintf("%s%splugin%spacker-datasource-%s",
+					packerPath, PACKERSPACE, PACKERSPACE, dataSource)
+				return c.Plugins.Client(bin).Datasource()
+			}
+		}
+	}
+
 	return nil
 }

go.mod

@@ -49,7 +49,7 @@ require (
 	github.com/hashicorp/go-uuid v1.0.2
 	github.com/hashicorp/go-version v1.2.0
 	github.com/hashicorp/hcl/v2 v2.8.0
-	github.com/hashicorp/packer-plugin-sdk v0.0.7-0.20210111224258-fd30ebb797f0
+	github.com/hashicorp/packer-plugin-sdk v0.0.7
 	github.com/hashicorp/vault/api v1.0.4
 	github.com/hetznercloud/hcloud-go v1.15.1
 	github.com/hyperonecom/h1-client-go v0.0.0-20191203060043-b46280e4c4a4

go.sum

@@ -3,42 +3,32 @@ cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMT
 cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
 cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
 cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1 h1:lRi0CHyU+ytlvylOlFKKq0af6JncuyoRh1J+QJBqQx0=
 cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
 cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
 cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
 cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0 h1:MZQCQQaRwOrAcuKjiHWHrgKykt4fZyuwF2dtiG3fGW8=
 cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
 cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
 cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
 cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
 cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0 h1:Dg9iHVQfrhq82rUNu9ZxUDrJLaxFUe/HlCVaLyRruq8=
 cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
 cloud.google.com/go v0.66.0 h1:DZeAkuQGQqnm9Xv36SbMJEU8aFBz4wL04UpMWPWwjzg=
 cloud.google.com/go v0.66.0/go.mod h1:dgqGAjKCDxyhGTtC9dAREQGUJpkceNm1yt590Qno0Ko=
 cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0 h1:sAbMqjY1PEQKZBWfbu6Y6bsupJ9c4QdHnzg/VvYTLcE=
 cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0 h1:xE3CPsOgttP4ACBePh79zTKALtXwn/Edhcr16R5hMWU=
 cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
 cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
 cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
 cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/datastore v1.0.0 h1:Kt+gOPPp2LEPWp8CSfxhsM8ik9CcyE/gYu+0r+RnZvM=
 cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0 h1:/May9ojXjRkPBNVrq+oWLqmWCkr4OU5uRY29bu0mRyQ=
 cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
 cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
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 cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0 h1:Lpy6hKgdcl7a3WGSfJIFmxmcdjSpP6OmBEfcOv1Y680=
 cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
 cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
 cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
 cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0 h1:UDpwYIwla4jHGzZJaEJYx1tOejbgSoNqsAfHAUYe2r8=
 cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
 cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
 cloud.google.com/go/storage v1.10.0 h1:STgFzyU5/8miMl0//zKh2aQeTyeaUH3WN9bSUiJ09bA=
@@ -79,12 +69,10 @@ github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbt
 github.com/Azure/go-ntlmssp v0.0.0-20180810175552-4a21cbd618b4/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/Azure/go-ntlmssp v0.0.0-20191115201650-bad6df29494a h1:3FwiePtHk5YJrooV799oo5jIfsgRdES25VdngJM03dU=
 github.com/Azure/go-ntlmssp v0.0.0-20191115201650-bad6df29494a/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
-github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/ChrisTrenkamp/goxpath v0.0.0-20170922090931-c385f95c6022 h1:y8Gs8CzNfDF5AZvjr+5UyGQvQEBL7pwo+v+wX6q9JI8=
 github.com/ChrisTrenkamp/goxpath v0.0.0-20170922090931-c385f95c6022/go.mod h1:nuWgzSkT5PnyOd+272uUmV0dnAnAn42Mk7PiQC5VzN4=
-github.com/DataDog/datadog-go v2.2.0+incompatible h1:V5BKkxACZLjzHjSgBbr2gvLA2Ae49yhc6CSY7MLy5k4=
 github.com/DataDog/datadog-go v2.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
 github.com/NaverCloudPlatform/ncloud-sdk-go-v2 v1.1.0 h1:0nxjOH7NurPGUWNG5BCrASWjB0uuhGbgJAKLqj2ZDTo=
 github.com/NaverCloudPlatform/ncloud-sdk-go-v2 v1.1.0/go.mod h1:P+3VS0ETiQPyWOx3vB/oeC8J3qd7jnVZLYAFwWgGRt8=
@@ -116,9 +104,7 @@ github.com/apparentlymart/go-textseg/v12 v12.0.0 h1:bNEQyAGak9tojivJNkoqWErVCQbj
 github.com/apparentlymart/go-textseg/v12 v12.0.0/go.mod h1:S/4uRK2UtaQttw1GenVJEynmyUenKwP++x/+DdGV/Ec=
 github.com/approvals/go-approval-tests v0.0.0-20160714161514-ad96e53bea43 h1:ePCAQPf5tUc5IMcUvu6euhSGna7jzs7eiXtJXHig6Zc=
 github.com/approvals/go-approval-tests v0.0.0-20160714161514-ad96e53bea43/go.mod h1:S6puKjZ9ZeqUPBv2hEBnMZGcM2J6mOsDRQcmxkMAND0=
-github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e h1:QEF07wC0T1rKkctt1RINW/+RMTVmiwxETico2l3gxJA=
 github.com/armon/circbuf v0.0.0-20150827004946-bbbad097214e/go.mod h1:3U/XgcO3hCbHZ8TKRvWD2dDTCfh9M9ya+I9JpbB7O8o=
-github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da h1:8GUt8eRujhVEGZFFEjBj46YV4rDjvGrNxb0KMWYkL2I=
 github.com/armon/go-metrics v0.0.0-20180917152333-f0300d1749da/go.mod h1:Q73ZrmVTwzkszR9V5SSuryQ31EELlFMUz1kKyl939pY=
 github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878 h1:EFSB7Zo9Eg91v7MJPVsifUysc/wPdN+NOnVe6bWbdBM=
 github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878/go.mod h1:3AMJUQhVx52RsWOnlkpikZr01T/yAVN2gn0861vByNg=
@@ -127,14 +113,11 @@ github.com/armon/go-radix v1.0.0 h1:F4z6KzEeeQIMeLFa97iZU6vupzoecKdU5TX24SNppXI=
 github.com/armon/go-radix v1.0.0/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/aws/aws-sdk-go v1.15.78/go.mod h1:E3/ieXAlvM0XWO57iftYVDLLvQ824smPP3ATZkfNZeM=
 github.com/aws/aws-sdk-go v1.26.3/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
-github.com/aws/aws-sdk-go v1.30.8 h1:4BHbh8K3qKmcnAgToZ2LShldRF9inoqIBccpCLNCy3I=
 github.com/aws/aws-sdk-go v1.30.8/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
 github.com/aws/aws-sdk-go v1.31.9/go.mod h1:5zCpMtNQVjRREroY7sYe8lOMRSxkhG6MZveU8YkpAk0=
-github.com/aws/aws-sdk-go v1.36.0 h1:CscTrS+szX5iu34zk2bZrChnGO/GMtUYgMK1Xzs2hYo=
 github.com/aws/aws-sdk-go v1.36.0/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go v1.36.5 h1:SouM2ar1A8f+3DYWW622sDdqkkZAO3ha4j8GQjiPLFg=
 github.com/aws/aws-sdk-go v1.36.5/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
-github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973 h1:xJ4a3vCFaGF/jqvzLMYoU8P317H5OQ+Via4RmuPwCS0=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d h1:xDfNPAt8lFiC1UJrqV3uuy861HCTo708pDMbjHHdCas=
 github.com/bgentry/go-netrc v0.0.0-20140422174119-9fd32a8b3d3d/go.mod h1:6QX/PXZ00z/TKoufEY6K/a0k6AhaJrQKdFe6OfVXsa4=
@@ -146,7 +129,6 @@ github.com/bmatcuk/doublestar v1.1.5 h1:2bNwBOmhyFEFcoB3tGvTD5xanq+4kyOZlB8wFYbM
 github.com/bmatcuk/doublestar v1.1.5/go.mod h1:wiQtGV+rzVYxB7WIlirSN++5HPtPlXEo9MEoZQC/PmE=
 github.com/c2h5oh/datasize v0.0.0-20200112174442-28bbd4740fee h1:BnPxIde0gjtTnc9Er7cxvBk8DHLWhEux0SxayC8dP6I=
 github.com/c2h5oh/datasize v0.0.0-20200112174442-28bbd4740fee/go.mod h1:S/7n9copUssQ56c7aAgHqftWO4LTf4xY6CGWt8Bc+3M=
-github.com/census-instrumentation/opencensus-proto v0.2.1 h1:glEXhBS5PSLLv4IXzLA5yPRVX4bilULVyxxbrfOtDAk=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cheggaaa/pb v1.0.27 h1:wIkZHkNfC7R6GI5w7l/PdAdzXzlrbcI3p8OAlnkTsnc=
 github.com/cheggaaa/pb v1.0.27/go.mod h1:pQciLPpbU0oxA0h+VJYYLxO+XeDQb5pZijXscXHm81s=
@@ -156,12 +138,9 @@ github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e h1:fY5BOSpyZCqRo5O
 github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 h1:q763qf9huN11kDQavWsoZXJNW3xEE4JJyHa5Q25/sd8=
 github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible h1:C29Ae4G5GtYyYMm1aztcyj/J5ckgJm2zwdDajFbx1NY=
 github.com/circonus-labs/circonus-gometrics v2.3.1+incompatible/go.mod h1:nmEj6Dob7S7YxXgwXpfOuvO54S+tGdZdw9fuRZt25Ag=
-github.com/circonus-labs/circonusllhist v0.1.3 h1:TJH+oke8D16535+jHExHj4nQvzlZrj7ug5D7I/orNUA=
 github.com/circonus-labs/circonusllhist v0.1.3/go.mod h1:kMXHVDlOchFAehlya5ePtbp5jckzBHf4XRpQvBOLI+I=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f h1:WBZRG4aNOuI15bLRrCgN8fCq8E5Xuty6jGbmSNEvSsU=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -185,15 +164,12 @@ github.com/dylanmei/winrmtest v0.0.0-20170819153634-c2fbb09e6c08 h1:0bp6/GrNOrTD
 github.com/dylanmei/winrmtest v0.0.0-20170819153634-c2fbb09e6c08/go.mod h1:VBVDFSBXCIW8JaHQpI8lldSKfYaLMzP9oyq6IJ4fhzY=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
-github.com/envoyproxy/go-control-plane v0.9.4 h1:rEvIZUSZ3fx39WIi3JkQqQBitGwpELBIYWeBVh6wn+E=
 github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
-github.com/envoyproxy/protoc-gen-validate v0.1.0 h1:EQciDnbrYxy13PgWoY8AqoxGiPrpgBZ1R8UNe3ddc+A=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/exoscale/egoscale v0.18.1 h1:1FNZVk8jHUx0AvWhOZxLEDNlacTU0chMXUUNkm9EZaI=
 github.com/exoscale/egoscale v0.18.1/go.mod h1:Z7OOdzzTOz1Q1PjQXumlz9Wn/CddH0zSYdCF3rnBKXE=
 github.com/fatih/camelcase v1.0.0 h1:hxNvNX/xYBp0ovncs8WyWZrOrpBNub/JfaMvbURyft8=
 github.com/fatih/camelcase v1.0.0/go.mod h1:yN2Sb0lFhZJUdVvtELVWefmrXpuZESvPmqwoZc+/fpc=
-github.com/fatih/color v1.7.0 h1:DkWD4oS2D8LGGgTQ6IvwJJXSL5Vp2ffcQg58nFV38Ys=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.9.0 h1:8xPHl4/q1VyqGIPif1F+1V3Y3lSmrq01EabUW3CoW5s=
 github.com/fatih/color v1.9.0/go.mod h1:eQcE1qtQxscV5RaZvpXrrb8Drkc3/DdQ+uUYCNjL+zU=
@@ -210,7 +186,6 @@ github.com/go-ini/ini v1.25.4/go.mod h1:ByCAeIL28uOIIG0E3PJtZPDL8WnHpFKFOtgjp+3I
 github.com/go-ldap/ldap v3.0.2+incompatible/go.mod h1:qfd9rJvER9Q0/D/Sqn1DfHRoBp40uXYvFoEVrNEPqRc=
 github.com/go-ole/go-ole v1.2.4 h1:nNBDSCOigTSiarFpYE9J/KtEA1IOW4CNeqT9TQDqCxI=
 github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM=
-github.com/go-resty/resty/v2 v2.1.1-0.20191201195748-d7b97669fe48 h1:JVrqSeQfdhYRFk24TvhTZWU0q8lfCojxZQFi3Ou7+uY=
 github.com/go-resty/resty/v2 v2.1.1-0.20191201195748-d7b97669fe48/go.mod h1:dZGr0i9PLlaaTD4H/hoZIDjQ+r6xq8mgbRzHZf7f2J8=
 github.com/go-resty/resty/v2 v2.3.0 h1:JOOeAvjSlapTT92p8xiS19Zxev1neGikoHsXJeOq8So=
 github.com/go-resty/resty/v2 v2.3.0/go.mod h1:UpN9CgLZNsv4e9XG50UU8xdI0F43UQ4HmxLBDwaroHU=
@@ -223,14 +198,10 @@ github.com/gobwas/glob v0.2.3/go.mod h1:d3Ez4x06l9bZtSvzIay5+Yzi0fmZzPgnTbPcKjJA
 github.com/gofrs/flock v0.7.3 h1:I0EKY9l8HZCXTMYC4F80vwT6KNypV9uYKP3Alm/hjmQ=
 github.com/gofrs/flock v0.7.3/go.mod h1:F1TvTiK9OcQqauNUHlbJvyl9Qa1QvF/gOUDKA14jxHU=
 github.com/gofrs/uuid v3.2.0+incompatible h1:y12jRkkFxsd7GpqdSZ+/KCs/fJbqpEXSGd4+jfEaewE=
-github.com/gofrs/uuid v3.2.0+incompatible h1:y12jRkkFxsd7GpqdSZ+/KCs/fJbqpEXSGd4+jfEaewE=
 github.com/gofrs/uuid v3.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
-github.com/gofrs/uuid v3.2.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
-github.com/gogo/protobuf v1.2.1 h1:/s5zKNz0uPFCZ5hddgPdo2TK2TVrUNMn0OOX8/aZMTE=
 github.com/gogo/protobuf v1.2.1/go.mod h1:hp+jE20tsWTFYpLwKvXlhS1hjn+gTNwPg2I6zVXpSg4=
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3 h1:zN2lZNZRflqFyxVaTIU61KNKQ9C0055u9CAfpmqUvo4=
 github.com/golang-collections/collections v0.0.0-20130729185459-604e922904d3/go.mod h1:nPpo7qLxd6XL3hWJG/O60sR8ZKfMCiIoNap5GvD12KU=
-github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b h1:VKtxabqXZkF25pY9ekfRL6a582T4P37/31XEstQ5p58=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
@@ -244,15 +215,11 @@ github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
 github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
 github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
 github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.3.5 h1:F768QJ1E9tib+q5Sc8MkdJi1RxLTbRcTf8LJV56aRls=
 github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
@@ -264,17 +231,12 @@ github.com/golang/protobuf v1.4.2 h1:+Z5KGCizgyZCbGh1KZqA0fcLLkwbsjIzS4aV2v7wJX0
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
 github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
-github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c h1:964Od4U6p2jUkFxvCydnIczKteheJEzHRToSGK3Bnlw=
 github.com/google/btree v0.0.0-20180813153112-4030bb1f1f0c/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
 github.com/google/btree v1.0.0 h1:0udJVsspx3VBr5FwtLhQQtuAsVc79tTq0ocGIPAU6qo=
 github.com/google/btree v1.0.0/go.mod h1:lNA+9X1NB3Zf8V7Ke586lFgjr2dZNuvo3lPJSGZ5JPQ=
-github.com/google/go-cmp v0.2.0 h1:+dTQ8DZQJz0Mb/HjFlkptS1FeQ4cWSnN941F8aEG4SQ=
 github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
-github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
 github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.3.1 h1:Xye71clBPdm5HgqGwUkwhbynsUJZhDbS20FvLhQ2izg=
 github.com/google/go-cmp v0.3.1/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
-github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
 github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.4.1/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
@@ -299,7 +261,6 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
 github.com/google/shlex v0.0.0-20150127133951-6f45313302b9 h1:JM174NTeGNJ2m/oLH3UOWOvWQQKd+BoL3hcSCUWFLt0=
 github.com/google/shlex v0.0.0-20150127133951-6f45313302b9/go.mod h1:RpwtwJQFrIEPstU94h88MWPXP2ektJZ8cZ0YntAmXiE=
 github.com/google/uuid v0.0.0-20170306145142-6a5e28554805/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
-github.com/google/uuid v1.1.1 h1:Gkbcsh/GbpXz7lPftLA3P6TYMwjCLYm83jiFQZF/3gY=
 github.com/google/uuid v1.1.1/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.1.2 h1:EVhdT+1Kseyi1/pUmXKaFxYsDNy9RQYkMWRH68J/W7Y=
 github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
@@ -327,7 +288,6 @@ github.com/hashicorp/errwrap v1.0.0 h1:hLrqtEDnRye3+sgx6z4qVLNuviH3MR5aQ0ykNJa/U
 github.com/hashicorp/errwrap v1.0.0/go.mod h1:YH+1FKiLXxHSkmPseP+kNlulaMuP3n2brvKWEqk/Jc4=
 github.com/hashicorp/go-checkpoint v0.0.0-20171009173528-1545e56e46de h1:XDCSythtg8aWSRSO29uwhgh7b127fWr+m5SemqjSUL8=
 github.com/hashicorp/go-checkpoint v0.0.0-20171009173528-1545e56e46de/go.mod h1:xIwEieBHERyEvaeKF/TcHh1Hu+lxPM+n2vT1+g9I4m4=
-github.com/hashicorp/go-cleanhttp v0.5.0 h1:wvCrVc9TjDls6+YGAF2hAifE1E5U1+b4tH6KdvN3Gig=
 github.com/hashicorp/go-cleanhttp v0.5.0/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
 github.com/hashicorp/go-cleanhttp v0.5.1 h1:dH3aiDG9Jvb5r5+bYHsikaOUIpcM0xvgMXVoDkXMzJM=
 github.com/hashicorp/go-cleanhttp v0.5.1/go.mod h1:JpRdi6/HCYpAwUzNwuwqhbovhLtngrth3wmdIIUrZ80=
@@ -346,15 +306,12 @@ github.com/hashicorp/go-hclog v0.0.0-20180709165350-ff2cf002a8dd/go.mod h1:9bjs9
 github.com/hashicorp/go-hclog v0.8.0/go.mod h1:5CU+agLiy3J7N7QjHK5d05KxGsuXiQLrjA0H7acj2lQ=
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@@ -369,50 +326,41 @@ github.com/hashicorp/go-rootcerts v1.0.2 h1:jzhAVGtqPKbwpyCPELlgNWhE1znq+qwJtW5O
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@@ -433,9 +381,7 @@ github.com/jdcloud-api/jdcloud-sdk-go v1.9.1-0.20190605102154-3d81a50ca961/go.mo
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@@ -464,7 +410,6 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1 h1:mweAR1A6xJ3oS2pRaGi
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@@ -478,20 +423,16 @@ github.com/linode/linodego v0.14.0/go.mod h1:2ce3S00NrDqJfp4i55ZuSlT0U3cKNELNYAC
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-github.com/mitchellh/gox v1.0.1 h1:x0jD3dcHk9a9xPSDN6YEL4xL6Qz0dvNYm8yZqui5chI=
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 github.com/mitchellh/iochan v1.0.0/go.mod h1:JwYml1nuB7xOzsp52dPpHFffvOCDupsG0QubkSMEySY=
 github.com/mitchellh/mapstructure v0.0.0-20160808181253-ca63d7c062ee/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
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-github.com/mitchellh/mapstructure v1.2.3 h1:f/MjBEBDLttYCGfRaKBbKSRVF5aV2O6fnBpzknuE3jU=
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 github.com/mitchellh/mapstructure v1.4.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
@@ -561,15 +494,12 @@ github.com/outscale/osc-sdk-go/osc v0.0.0-20200722135656-d654809d0699 h1:SHe9i7h
 github.com/outscale/osc-sdk-go/osc v0.0.0-20200722135656-d654809d0699/go.mod h1:5AqqNH1X8zCHescKVlpSHRzrat1KCKDXqZoQPe8fY3A=
 github.com/packer-community/winrmcp v0.0.0-20180921204643-0fd363d6159a h1:A3QMuteviunoaY/8ex+RKFqwhcZJ/Cf3fCW3IwL2wx4=
 github.com/packer-community/winrmcp v0.0.0-20180921204643-0fd363d6159a/go.mod h1:f6Izs6JvFTdnRbziASagjZ2vmf55NSIkC/weStxCHqk=
-github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c h1:Lgl0gzECD8GnQ5QCWA8o6BtfL6mDH5rQgM4/fX3avOs=
 github.com/pascaldekloe/goe v0.0.0-20180627143212-57f6aae5913c/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pascaldekloe/goe v0.1.0 h1:cBOtyMzM9HTpWjXfbbunk26uA6nG3a8n06Wieeh0MwY=
 github.com/pascaldekloe/goe v0.1.0/go.mod h1:lzWF7FIEvWOWxwDKqyGYQf6ZUaNfKdP144TG7ZOy1lc=
 github.com/pierrec/lz4 v2.0.5+incompatible h1:2xWsjqPFWcplujydGg4WmhC/6fZqK42wMM8aXeqhl0I=
 github.com/pierrec/lz4 v2.0.5+incompatible/go.mod h1:pdkljMzZIN41W+lC3N2tnIh5sFi+IEE17M5jbnwPHcY=
-github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
 github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=
 github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
 github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
@@ -577,24 +507,18 @@ github.com/pkg/sftp v0.0.0-20160118190721-e84cc8c755ca h1:k8gsErq3rkcbAyCnpOycQs
 github.com/pkg/sftp v0.0.0-20160118190721-e84cc8c755ca/go.mod h1:NxmoDg/QLVWluQDUYG7XBZTLUpKeFa8e3aMf1BfjyHk=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/posener/complete v1.1.1 h1:ccV59UEOTzVDnDUEFdT95ZzHVZ+5+158q8+SJb2QV5w=
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
 github.com/posener/complete v1.2.3 h1:NP0eAhjcjImqslEwo/1hq7gpajME0fTLTezBKDqfXqo=
 github.com/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSgv7Sy7s/s=
 github.com/profitbricks/profitbricks-sdk-go v4.0.2+incompatible h1:ZoVHH6voxW9Onzo6z2yLtocVoN6mBocyDoqoyAMHokE=
 github.com/profitbricks/profitbricks-sdk-go v4.0.2+incompatible/go.mod h1:T3/WrziK7fYH3C8ilAFAHe99R452/IzIG3YYkqaOFeQ=
-github.com/prometheus/client_golang v0.9.2 h1:awm861/B8OKDd2I/6o1dy3ra4BamzKhYOiGItCeZ740=
 github.com/prometheus/client_golang v0.9.2/go.mod h1:OsXs2jCmiKlQ1lTBmv21f2mNfw4xf/QclQDMrYNZzcM=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
-github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4 h1:gQz4mCbXsO+nc9n1hCxHcGA3Zx3Eo+UHZoInFGUIXNM=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/prometheus/common v0.0.0-20181126121408-4724e9255275 h1:PnBWHBf+6L0jOqq0gIVUe6Yk0/QMZ640k6NvkxcBf+8=
 github.com/prometheus/common v0.0.0-20181126121408-4724e9255275/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
-github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a h1:9a8MnZMP0X2nLJdBg+pBmGgkJlSaKC2KaQmTCk1XDtE=
 github.com/prometheus/procfs v0.0.0-20181204211112-1dc9a6cbc91a/go.mod h1:c3At6R/oaqEKCNdg8wHV1ftS6bRYblBhIjjI8uT2IGk=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
 github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
-github.com/ryanuber/columnize v2.1.0+incompatible h1:j1Wcmh8OrK4Q7GXY+V7SVSY8nUWQxHW5TkBe7YUl+2s=
 github.com/ryanuber/columnize v2.1.0+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
 github.com/ryanuber/go-glob v1.0.0 h1:iQh3xXAumdQ+4Ufa5b25cRpC5TYKlno6hsv6Cb3pkBk=
 github.com/ryanuber/go-glob v1.0.0/go.mod h1:807d1WSdnB0XRJzKNil9Om6lcp/3a0v4qIHxIXzX/Yc=
@@ -610,7 +534,6 @@ github.com/shirou/gopsutil v2.18.12+incompatible h1:1eaJvGomDnH74/5cF4CTmTbLHAri
 github.com/shirou/gopsutil v2.18.12+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4 h1:udFKJ0aHUL60LboW/A+DfgoHVedieIzIXE8uylPue0U=
 github.com/shirou/w32 v0.0.0-20160930032740-bb4de0191aa4/go.mod h1:qsXQc7+bwAM3Q1u/4XEfrquwF8Lw7D7y5cD8CuHnfIc=
-github.com/sirupsen/logrus v1.3.0 h1:hI/7Q+DtNZ2kINb6qt/lS+IyXnHQe9e90POfeewL/ME=
 github.com/sirupsen/logrus v1.3.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
@@ -621,23 +544,17 @@ github.com/smartystreets/goconvey v0.0.0-20181108003508-044398e4856c/go.mod h1:X
 github.com/spf13/pflag v1.0.2/go.mod h1:DYY7MBk1bdzusC3SYhjObp+wFpr4gzcvqqNjLnInEg4=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
-github.com/stretchr/objx v0.1.1 h1:2vfRuCMp5sSVIDSqO8oNnWJq7mPa6KVP3iPIwFBuy8A=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
 github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
-github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
 github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
-github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
 github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
 github.com/stretchr/testify v1.6.1 h1:hDPOHmpOpP40lSULcqw7IrRb/u7w6RpDC9399XyoNd0=
 github.com/stretchr/testify v1.6.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/tencentcloud/tencentcloud-sdk-go v3.0.222+incompatible h1:bs+0lcG4RELNbE8PsBC9oaPP0/qExr0DuEGnZyocm84=
 github.com/tencentcloud/tencentcloud-sdk-go v3.0.222+incompatible/go.mod h1:0PfYow01SHPMhKY31xa+EFz2RStxIqj6JFAJS+IkCi4=
-github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926 h1:G3dpKMzFDjgEh2q1Z7zUUtKa8ViPtH+ocF0bE0g00O8=
 github.com/tv42/httpunix v0.0.0-20150427012821-b75d8614f926/go.mod h1:9ESjWnEqriFuLhtthL60Sar/7RFoluCcXsuvEwTV5KM=
 github.com/ucloud/ucloud-sdk-go v0.16.3 h1:DCh4A5vSxFr3EvtvJL+g0Ehy4hSlEkMpQmEvxEQhYdo=
 github.com/ucloud/ucloud-sdk-go v0.16.3/go.mod h1:dyLmFHmUfgb4RZKYQP9IArlvQ2pxzFthfhwxRzOEPIw=
@@ -647,7 +564,6 @@ github.com/ugorji/go v0.0.0-20151218193438-646ae4a518c1 h1:U6ufy3mLDgg9RYupntOvA
 github.com/ugorji/go v0.0.0-20151218193438-646ae4a518c1/go.mod h1:hnLbHMwcvSihnDhEfx2/BzKp2xb0Y+ErdfYcrs9tkJQ=
 github.com/ulikunitz/xz v0.5.5 h1:pFrO0lVpTBXLpYw+pnLj6TbvHuyjXMfjGeCwSqCVwok=
 github.com/ulikunitz/xz v0.5.5/go.mod h1:2bypXElzHzzJZwzH67Y6wb67pO62Rzfn7BSiF4ABRW8=
-github.com/vmihailenco/msgpack v3.3.3+incompatible h1:wapg9xDUZDzGCNFlwc5SqI1rvcciqcxEHac4CYj89xI=
 github.com/vmihailenco/msgpack v3.3.3+incompatible/go.mod h1:fy3FlTQTDXWkZ7Bh6AcGMlsjHatGryHQYUTf1ShIgkk=
 github.com/vmihailenco/msgpack/v4 v4.3.12/go.mod h1:gborTTJjAo/GWTqqRjrLCn9pgNN+NXzzngzBKDPIqw4=
 github.com/vmihailenco/tagparser v0.1.1/go.mod h1:OeAg3pn3UbLjkWt+rN9oFYB6u/cQgqMEUPoW2WPyhdI=
@@ -666,18 +582,14 @@ github.com/yuin/goldmark v1.1.32/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9de
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/zclconf/go-cty v1.0.0/go.mod h1:xnAOWiHeOqg2nWS62VtQ7pbOu17FtxJNW8RLEih+O3s=
 github.com/zclconf/go-cty v1.2.0/go.mod h1:hOPWgoHbaTUnI5k4D2ld+GRpFJSCe6bCM7m1q/N4PQ8=
-github.com/zclconf/go-cty v1.4.0 h1:+q+tmgyUB94HIdH/uVTIi/+kt3pt4sHwEZAcTyLoGsQ=
 github.com/zclconf/go-cty v1.4.0/go.mod h1:nHzOclRkoj++EU9ZjSrZvRG0BXIWt8c7loYc0qXAFGQ=
 github.com/zclconf/go-cty v1.7.0 h1:yMqLinUwNCYkmiHjEH+luio1yGl35cjqVzjvdRg2WlY=
 github.com/zclconf/go-cty v1.7.0/go.mod h1:VDR4+I79ubFBGm1uJac1226K5yANQFHeauxPBoP54+o=
 github.com/zclconf/go-cty-yaml v1.0.1 h1:up11wlgAaDvlAGENcFDnZgkn0qUJurso7k6EpURKNF8=
 github.com/zclconf/go-cty-yaml v1.0.1/go.mod h1:IP3Ylp0wQpYm50IHK8OZWKMu6sPJIUgKa8XhiVHura0=
-go.opencensus.io v0.21.0 h1:mU6zScU4U1YAFPHEHYk+3JC4SY7JxgkqS10ZOSyksNg=
 go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
-go.opencensus.io v0.22.0 h1:C9hSCOW830chIVkdja34wa6Ky+IzWllkUinR+BtRZd4=
 go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
-go.opencensus.io v0.22.3 h1:8sGtKOrtQqkN1bp2AtX+misvLIlOmsEsNd+9NIcPEm8=
 go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
 go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
 go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
@@ -685,22 +597,17 @@ go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/zap v1.10.0/go.mod h1:vwi/ZaCAaUcBkycHslxD9B2zi4UTXhF60s6SWpuDF0Q=
 golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3 h1:KYQXGkl6vs02hK7pK4eIbw0NpNPedieTSTEiJ//bwGs=
 golang.org/x/crypto v0.0.0-20181029021203-45a5f77698d3/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
 golang.org/x/crypto v0.0.0-20190222235706-ffb98f73852f/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
-golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 h1:VklqNMn3ovrHsnt90PveolxSbWFaJdECFbxSq0Mqo2M=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
-golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5 h1:58fnuSXlxZmFdJyvtTFVmVhcMLU6v5fEb/ok4wyqtNU=
 golang.org/x/crypto v0.0.0-20190605123033-f99c8df09eb5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=
 golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20191202143827-86a70503ff7e/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20191206172530-e9b2fee46413/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20200422194213-44a606286825 h1:dSChiwOTvzwbHFTMq2l6uRardHH7/E6SqEkqccinS/o=
 golang.org/x/crypto v0.0.0-20200422194213-44a606286825/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
 golang.org/x/crypto v0.0.0-20201208171446-5f87f3452ae9 h1:sYNJzB4J8toYPQTM6pAkcmBRgw9SnQKP9oXCHfgy604=
 golang.org/x/crypto v0.0.0-20201208171446-5f87f3452ae9/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
@@ -710,12 +617,10 @@ golang.org/x/exp v0.0.0-20190510132918-efd6b22b2522/go.mod h1:ZjyILWgesfNpC6sMxT
 golang.org/x/exp v0.0.0-20190731235908-ec7cb31e5a56/go.mod h1:JhuoJpWY28nO4Vef9tZUw9qufEGTyX1+7lmHxV5q5G4=
 golang.org/x/exp v0.0.0-20190829153037-c13cbed26979/go.mod h1:86+5VVa7VpoJ4kLfm080zCjGlMRFzhUhsZKEZO7MGek=
 golang.org/x/exp v0.0.0-20191030013958-a1ab85dbe136/go.mod h1:JXzH8nQsPlswgeRAPE3MuO9GYsAcnJvJ4vnMwN/5qkY=
-golang.org/x/exp v0.0.0-20191129062945-2f5052295587 h1:5Uz0rkjCFu9BC9gCRN7EkwVvhNyQgGWb8KNJrPwBoHY=
 golang.org/x/exp v0.0.0-20191129062945-2f5052295587/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20191227195350-da58074b4299/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200119233911-0405dc783f0a/go.mod h1:2RIsYlXP63K8oxa1u096TMicItID8zy7Y6sNkU49FU4=
 golang.org/x/exp v0.0.0-20200207192155-f17229e696bd/go.mod h1:J/WKrq2StrnmMY6+EHIKF9dgMWnmCNThgcyBT1FY9mM=
-golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6 h1:QE6XYQK6naiK1EPAe1g/ILLxN5RBoH5xkJk3CqlMI/Y=
 golang.org/x/exp v0.0.0-20200224162631-6cc2880d07d6/go.mod h1:3jZMyOhIsHpP37uCMkUooju7aAi5cS1Q23tOzKc+0MU=
 golang.org/x/image v0.0.0-20190227222117-0694c2d4d067/go.mod h1:kZ7UVZpmo3dzQBMxlp+ypCbDeSB+sBbTgSJuh5dn5js=
 golang.org/x/image v0.0.0-20190802002840-cff245a6509b/go.mod h1:FeLwcggjj3mMvU+oOTbSwawSJRM1uh48EjtB4UJZlP0=
@@ -726,25 +631,20 @@ golang.org/x/lint v0.0.0-20190313153728-d0100b6bd8b3/go.mod h1:6SW0HCj/g11FgYtHl
 golang.org/x/lint v0.0.0-20190409202823-959b441ac422/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190909230951-414d861bb4ac/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
 golang.org/x/lint v0.0.0-20190930215403-16217165b5de/go.mod h1:6SW0HCj/g11FgYtHlgUYUwCkIfeOF89ocIRzGO/8vkc=
-golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f h1:J5lckAjkw6qYlOZNj90mLYNTEKDvWeuc1yieZ8qUzUE=
 golang.org/x/lint v0.0.0-20191125180803-fdd1cda4f05f/go.mod h1:5qLYkcX4OjUUV8bRuDixDT3tpyyb+LUpUlRWLxfhWrs=
-golang.org/x/lint v0.0.0-20200130185559-910be7a94367 h1:0IiAsCRByjO2QjX7ZPkw5oU9x+n1YqRL802rjC0c3Aw=
 golang.org/x/lint v0.0.0-20200130185559-910be7a94367/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b h1:Wh+f8QHJXR411sJR8/vRBTZ7YapZaRvUcLFFJhusH0k=
 golang.org/x/lint v0.0.0-20200302205851-738671d3881b/go.mod h1:3xt1FjdF8hUf6vQPIChWIBhFzV8gjjsPE/fR3IyQdNY=
 golang.org/x/mobile v0.0.0-20190312151609-d3739f865fa6/go.mod h1:z+o9i4GpDbdi3rU15maQ/Ox0txvL9dWGYEHz965HBQE=
 golang.org/x/mobile v0.0.0-20190719004257-d2bd2a29d028/go.mod h1:E/iHnbuqvinMTCcRqshq8CkpyQDoeVncDDYHnLhea+o=
-golang.org/x/mobile v0.0.0-20191130191448-5c0e7e404af8 h1:9w7mvrikkrG9zFfEJfuFe08FVKrg8Yi0ePhOdGAKpUw=
 golang.org/x/mobile v0.0.0-20191130191448-5c0e7e404af8/go.mod h1:p895TfNkDgPEmEQrNiOtIl3j98d/tGU95djDj7NfyjQ=
 golang.org/x/mobile v0.0.0-20201208152944-da85bec010a2 h1:3HADozU50HyrJ2jklLtr3xr0itFkz9u4LxCJhqKVdjI=
 golang.org/x/mobile v0.0.0-20201208152944-da85bec010a2/go.mod h1:skQtrUTUwhdJvXM/2KKJzY8pDgNr9I/FOMqDVRPBUS4=
 golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKGUJ2LatrhH/nqhxcFungHvyanc=
 golang.org/x/mod v0.1.0/go.mod h1:0QHyrYULN0/3qlju5TqG8bIK38QM8yzMo5ekMj3DlcY=
-golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee h1:WG0RUwxtNT4qqaXX3DPA8zHFNm/D9xaBpxzHt1WcA/E=
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.1.1-0.20191107180719-034126e5016b/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.1.1-0.20191209134235-331c550502dd/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
-golang.org/x/mod v0.2.0 h1:KU7oHjnv3XNWfa5COkzUifxZmxp1TyI7ImMXqFxLwvQ=
 golang.org/x/mod v0.2.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.3.0 h1:RM4zey1++hCTbCVQfnWeKs9/IEsaBLA8vTkd0WVtmH4=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
@@ -752,18 +652,14 @@ golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73r
 golang.org/x/net v0.0.0-20180811021610-c39426892332/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20181023162649-9b4f9f5ad519/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20181201002055-351d144fa1fc h1:a3CU5tJYVj92DY2LaA1kUkrsqD5/3mLDhx2NcNqyW+0=
 golang.org/x/net v0.0.0-20181201002055-351d144fa1fc/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20190108225652-1e06a53dbb7e/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190213061140-3a22650c66bd h1:HuTn7WObtcDo9uEEU7rEqL0jYthdXAmZ6PP+meazmaU=
 golang.org/x/net v0.0.0-20190213061140-3a22650c66bd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
-golang.org/x/net v0.0.0-20190311183353-d8887717615a h1:oWX7TPOiFAMXLq8o0ikBYfCJVlRHBcsciT5bXOrH628=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190501004415-9ce7a6920f09/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190603091049-60506f45cf65/go.mod h1:HSz+uSET+XFnRR8LxR5pz3Of3rY3CfYBVs4xY44aLks=
-golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190628185345-da137c7871d7/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
@@ -783,13 +679,9 @@ golang.org/x/net v0.0.0-20200513185701-a91f0712d120/go.mod h1:qpuaurCH72eLCgpAm/
 golang.org/x/net v0.0.0-20200520182314-0ba52f642ac2/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
 golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
 golang.org/x/net v0.0.0-20200707034311-ab3426394381/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200822124328-c89045814202 h1:VvcQYSHwXgi7W+TpUR6A9g6Up98WAHf3f/ulnJ62IyA=
 golang.org/x/net v0.0.0-20200822124328-c89045814202/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20200904194848-62affa334b73 h1:MXfv8rhZWmFeqX3GNZRsd6vOLoaCHjYEX3qkRo3YBUA=
 golang.org/x/net v0.0.0-20200904194848-62affa334b73/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
-golang.org/x/net v0.0.0-20201021035429-f5854403a974 h1:IX6qOQeG5uLjB/hjjwjedwfjND0hgjPMMyO1RoIXQNI=
 golang.org/x/net v0.0.0-20201021035429-f5854403a974/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
-golang.org/x/net v0.0.0-20201110031124-69a78807bb2b h1:uwuIcX0g4Yl1NC5XAz37xsr2lTtcqevgzYNVt49waME=
 golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwYZr8TS3Oi6o0r6Gce1SSxlDquU=
 golang.org/x/net v0.0.0-20201209123823-ac852fbbde11 h1:lwlPPsmjDKK0J6eG6xDWd5XPehI0R024zxjDnw3esPA=
 golang.org/x/net v0.0.0-20201209123823-ac852fbbde11/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
@@ -797,7 +689,6 @@ golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAG
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20190604053449-0f29369cfe45/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20191202225959-858c2ad4c8b6/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
-golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d h1:TzXSXBo42m9gQenoE3b9BGiEpg5IG2JkU5FkPIawgtw=
 golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=
 golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43 h1:ld7aEMNHoBnnDAX15v1T6z31v8HwR2A9FYOuAhWqkwc=
 golang.org/x/oauth2 v0.0.0-20200902213428-5d25da1a8d43/go.mod h1:KelEdhl1UZF7XfJ4dDtk6s++YSgaE7mD/BuKKDLBl4A=
@@ -807,11 +698,8 @@ golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
 golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208 h1:qwRHBd0NqMbJxfbotnDhm2ByMI1Shq4Y6oRJo21SGJA=
 golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9 h1:SQFwaSi55rU7vdNs9Yr0Z324VNlrF+0wMqRXT4St8ck=
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a h1:DcqTD9SDLc+1P/r1EmRBwnVsrOwW+kk2vWf9n+1sGhs=
 golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -857,7 +745,6 @@ golang.org/x/sys v0.0.0-20200523222454-059865788121/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200803210538-64077c9b5642/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200828194041-157a740278f4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200905004654-be1d3432aa8f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f h1:+Nyd8tzPX9R7BWHguqsrbFdRx3WQ/1ib8I44HXV5yTA=
 golang.org/x/sys v0.0.0-20200930185726-fdedc70b468f/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 h1:nxC68pudNYkKU6jWhgrqdreuFiOQWj1Fs7T3VrH4Pjw=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=

hcl2template/common_test.go

@@ -33,6 +33,9 @@ func getBasicParser() *Parser {
 			"amazon-import": func() (packersdk.PostProcessor, error) { return &MockPostProcessor{}, nil },
 			"manifest":      func() (packersdk.PostProcessor, error) { return &MockPostProcessor{}, nil },
 		},
+		DatasourceSchemas: packersdk.MapOfDatasource{
+			"amazon-ami": func() (packersdk.Datasource, error) { return &MockDatasource{}, nil },
+		},
 	}
 }
 
@@ -62,7 +65,7 @@ func testParse(t *testing.T, tests []parseTest) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			gotCfg, gotDiags := tt.parser.Parse(tt.args.filename, tt.args.varFiles, tt.args.vars)
-			moreDiags := gotCfg.Initialize()
+			moreDiags := gotCfg.Initialize(packer.InitializeOptions{})
 			gotDiags = append(gotDiags, moreDiags...)
 			if tt.parseWantDiags == (gotDiags == nil) {
 				t.Fatalf("Parser.parse() unexpected %q diagnostics.", gotDiags)
@@ -125,13 +128,39 @@ var (
 		Tags: []MockTag{},
 	}
 
+	// everything in the tests is a basicNestedMockConfig this allow to test
+	// each known type to packer ( and embedding ) in one go.
+	builderBasicNestedMockConfig = NestedMockConfig{
+		String:   "string",
+		Int:      42,
+		Int64:    43,
+		Bool:     true,
+		Trilean:  config.TriTrue,
+		Duration: 10 * time.Second,
+		MapStringString: map[string]string{
+			"a": "b",
+			"c": "d",
+		},
+		SliceString: []string{
+			"a",
+			"b",
+			"c",
+		},
+		SliceSliceString: [][]string{
+			{"a", "b"},
+			{"c", "d"},
+		},
+		Tags:       []MockTag{},
+		Datasource: "string",
+	}
+
 	basicMockBuilder = &MockBuilder{
 		Config: MockConfig{
-			NestedMockConfig: basicNestedMockConfig,
-			Nested:           basicNestedMockConfig,
+			NestedMockConfig: builderBasicNestedMockConfig,
+			Nested:           builderBasicNestedMockConfig,
 			NestedSlice: []NestedMockConfig{
-				basicNestedMockConfig,
-				basicNestedMockConfig,
+				builderBasicNestedMockConfig,
+				builderBasicNestedMockConfig,
 			},
 		},
 	}
@@ -226,6 +255,7 @@ var cmpOpts = []cmp.Option{
 		PackerConfig{},
 		Variable{},
 		SourceBlock{},
+		Datasource{},
 		ProvisionerBlock{},
 		PostProcessorBlock{},
 		packer.CoreBuild{},

hcl2template/internal/mock.go

@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/hashicorp/hcl/v2/hcldec"
+	"github.com/hashicorp/packer-plugin-sdk/hcl2helper"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 	"github.com/hashicorp/packer-plugin-sdk/template/config"
 	"github.com/zclconf/go-cty/cty"
@@ -26,6 +27,7 @@ type NestedMockConfig struct {
 	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string"`
 	NamedString          NamedString          `mapstructure:"named_string"`
 	Tags                 []MockTag            `mapstructure:"tag"`
+	Datasource           string               `mapstructure:"data_source"`
 }
 
 type MockTag struct {
@@ -103,6 +105,32 @@ func (b *MockProvisioner) Provision(ctx context.Context, ui packersdk.Ui, comm p
 	return nil
 }
 
+//////
+// MockDatasource
+//////
+
+type MockDatasource struct {
+	Config MockConfig
+}
+
+var _ packersdk.Datasource = new(MockDatasource)
+
+func (d *MockDatasource) ConfigSpec() hcldec.ObjectSpec {
+	return d.Config.FlatMapstructure().HCL2Spec()
+}
+
+func (d *MockDatasource) OutputSpec() hcldec.ObjectSpec {
+	return d.Config.FlatMapstructure().HCL2Spec()
+}
+
+func (d *MockDatasource) Configure(raws ...interface{}) error {
+	return d.Config.Prepare(raws...)
+}
+
+func (d *MockDatasource) Execute() (cty.Value, error) {
+	return hcl2helper.HCL2ValueFromConfig(d.Config, d.OutputSpec()), nil
+}
+
 //////
 // MockPostProcessor
 //////

hcl2template/internal/mock.hcl2spec.go

@@ -23,6 +23,7 @@ type FlatMockConfig struct {
 	NamedMapStringString NamedMapStringString   `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
 	NamedString          *NamedString           `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
 	Tags                 []FlatMockTag          `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string                `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
 	Nested               *FlatNestedMockConfig  `mapstructure:"nested" cty:"nested" hcl:"nested"`
 	NestedSlice          []FlatNestedMockConfig `mapstructure:"nested_slice" cty:"nested_slice" hcl:"nested_slice"`
 }
@@ -52,6 +53,7 @@ func (*FlatMockConfig) HCL2Spec() map[string]hcldec.Spec {
 		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
 		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
 		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
 		"nested":                  &hcldec.BlockSpec{TypeName: "nested", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
 		"nested_slice":            &hcldec.BlockListSpec{TypeName: "nested_slice", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
 	}
@@ -98,6 +100,7 @@ type FlatNestedMockConfig struct {
 	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
 	NamedString          *NamedString         `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
 	Tags                 []FlatMockTag        `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string              `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
 }
 
 // FlatMapstructure returns a new FlatNestedMockConfig.
@@ -124,6 +127,7 @@ func (*FlatNestedMockConfig) HCL2Spec() map[string]hcldec.Spec {
 		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
 		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
 		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
 	}
 	return s
 }

hcl2template/parser.go

@@ -20,6 +20,7 @@ const (
 	variablesLabel    = "variables"
 	variableLabel     = "variable"
 	localsLabel       = "locals"
+	dataSourceLabel   = "data"
 	buildLabel        = "build"
 	communicatorLabel = "communicator"
 )
@@ -31,6 +32,7 @@ var configSchema = &hcl.BodySchema{
 		{Type: variablesLabel},
 		{Type: variableLabel, LabelNames: []string{"name"}},
 		{Type: localsLabel},
+		{Type: dataSourceLabel, LabelNames: []string{"type", "name"}},
 		{Type: buildLabel},
 		{Type: communicatorLabel, LabelNames: []string{"type", "name"}},
 	},
@@ -60,6 +62,8 @@ type Parser struct {
 	ProvisionersSchemas packer.ProvisionerStore
 
 	PostProcessorsSchemas packer.PostProcessorStore
+
+	DatasourceSchemas packer.DatasourceStore
 }
 
 const (
@@ -129,6 +133,7 @@ func (p *Parser) Parse(filename string, varFiles []string, argVars map[string]st
 		builderSchemas:          p.BuilderSchemas,
 		provisionersSchemas:     p.ProvisionersSchemas,
 		postProcessorsSchemas:   p.PostProcessorsSchemas,
+		datasourceSchemas:       p.DatasourceSchemas,
 		parser:                  p,
 		files:                   files,
 	}
@@ -155,6 +160,11 @@ func (p *Parser) Parse(filename string, varFiles []string, argVars map[string]st
 			diags = append(diags, cfg.decodeInputVariables(file)...)
 		}
 
+		for _, file := range files {
+			morediags := p.decodeDatasources(file, cfg)
+			diags = append(diags, morediags...)
+		}
+
 		for _, file := range files {
 			moreLocals, morediags := cfg.parseLocalVariables(file)
 			diags = append(diags, morediags...)
@@ -247,13 +257,14 @@ func sniffCoreVersionRequirements(body hcl.Body) ([]VersionConstraint, hcl.Diagn
 	return constraints, diags
 }
 
-func (cfg *PackerConfig) Initialize() hcl.Diagnostics {
+func (cfg *PackerConfig) Initialize(opts packer.InitializeOptions) hcl.Diagnostics {
 	var diags hcl.Diagnostics
 
 	_, moreDiags := cfg.InputVariables.Values()
 	diags = append(diags, moreDiags...)
 	_, moreDiags = cfg.LocalVariables.Values()
 	diags = append(diags, moreDiags...)
+	diags = append(diags, cfg.evaluateDatasources(opts.SkipDatasourcesExecution)...)
 	diags = append(diags, cfg.evaluateLocalVariables(cfg.LocalBlocks)...)
 
 	for _, variable := range cfg.InputVariables {
@@ -328,3 +339,41 @@ func (p *Parser) decodeConfig(f *hcl.File, cfg *PackerConfig) hcl.Diagnostics {
 
 	return diags
 }
+
+func (p *Parser) decodeDatasources(file *hcl.File, cfg *PackerConfig) hcl.Diagnostics {
+	var diags hcl.Diagnostics
+
+	body := dynblock.Expand(file.Body, cfg.EvalContext(nil))
+	content, moreDiags := body.Content(configSchema)
+	diags = append(diags, moreDiags...)
+
+	for _, block := range content.Blocks {
+		switch block.Type {
+		case dataSourceLabel:
+			datasource, moreDiags := p.decodeDataBlock(block)
+			diags = append(diags, moreDiags...)
+			if moreDiags.HasErrors() {
+				continue
+			}
+			ref := datasource.Ref()
+			if existing, found := cfg.Datasources[ref]; found {
+				diags = append(diags, &hcl.Diagnostic{
+					Severity: hcl.DiagError,
+					Summary:  "Duplicate " + dataSourceLabel + " block",
+					Detail: fmt.Sprintf("This "+dataSourceLabel+" block has the "+
+						"same data type and name as a previous block declared "+
+						"at %s. Each "+dataSourceLabel+" must have a unique name per builder type.",
+						existing.block.DefRange.Ptr()),
+					Subject: datasource.block.DefRange.Ptr(),
+				})
+				continue
+			}
+			if cfg.Datasources == nil {
+				cfg.Datasources = Datasources{}
+			}
+			cfg.Datasources[ref] = *datasource
+		}
+	}
+
+	return diags
+}

hcl2template/shim/mock.go

@@ -0,0 +1,40 @@
+//go:generate mapstructure-to-hcl2 -type MockConfig,NestedMockConfig,MockTag
+
+package hcl2shim
+
+import (
+	"time"
+
+	"github.com/hashicorp/packer-plugin-sdk/template/config"
+)
+
+type NestedMockConfig struct {
+	String               string               `mapstructure:"string"`
+	Int                  int                  `mapstructure:"int"`
+	Int64                int64                `mapstructure:"int64"`
+	Bool                 bool                 `mapstructure:"bool"`
+	Trilean              config.Trilean       `mapstructure:"trilean"`
+	Duration             time.Duration        `mapstructure:"duration"`
+	MapStringString      map[string]string    `mapstructure:"map_string_string"`
+	SliceString          []string             `mapstructure:"slice_string"`
+	SliceSliceString     [][]string           `mapstructure:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string"`
+	NamedString          NamedString          `mapstructure:"named_string"`
+	Tags                 []MockTag            `mapstructure:"tag"`
+	Datasource           string               `mapstructure:"data_source"`
+}
+
+type MockTag struct {
+	Key   string `mapstructure:"key"`
+	Value string `mapstructure:"value"`
+}
+
+type MockConfig struct {
+	NotSquashed      string `mapstructure:"not_squashed"`
+	NestedMockConfig `mapstructure:",squash"`
+	Nested           NestedMockConfig   `mapstructure:"nested"`
+	NestedSlice      []NestedMockConfig `mapstructure:"nested_slice"`
+}
+
+type NamedMapStringString map[string]string
+type NamedString string

hcl2template/shim/mock.hcl2spec.go

@@ -0,0 +1,133 @@
+// Code generated by "mapstructure-to-hcl2 -type MockConfig,NestedMockConfig,MockTag"; DO NOT EDIT.
+
+package hcl2shim
+
+import (
+	"github.com/hashicorp/hcl/v2/hcldec"
+	"github.com/zclconf/go-cty/cty"
+)
+
+// FlatMockConfig is an auto-generated flat version of MockConfig.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatMockConfig struct {
+	NotSquashed          *string                `mapstructure:"not_squashed" cty:"not_squashed" hcl:"not_squashed"`
+	String               *string                `mapstructure:"string" cty:"string" hcl:"string"`
+	Int                  *int                   `mapstructure:"int" cty:"int" hcl:"int"`
+	Int64                *int64                 `mapstructure:"int64" cty:"int64" hcl:"int64"`
+	Bool                 *bool                  `mapstructure:"bool" cty:"bool" hcl:"bool"`
+	Trilean              *bool                  `mapstructure:"trilean" cty:"trilean" hcl:"trilean"`
+	Duration             *string                `mapstructure:"duration" cty:"duration" hcl:"duration"`
+	MapStringString      map[string]string      `mapstructure:"map_string_string" cty:"map_string_string" hcl:"map_string_string"`
+	SliceString          []string               `mapstructure:"slice_string" cty:"slice_string" hcl:"slice_string"`
+	SliceSliceString     [][]string             `mapstructure:"slice_slice_string" cty:"slice_slice_string" hcl:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString   `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
+	NamedString          *NamedString           `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
+	Tags                 []FlatMockTag          `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string                `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
+	Nested               *FlatNestedMockConfig  `mapstructure:"nested" cty:"nested" hcl:"nested"`
+	NestedSlice          []FlatNestedMockConfig `mapstructure:"nested_slice" cty:"nested_slice" hcl:"nested_slice"`
+}
+
+// FlatMapstructure returns a new FlatMockConfig.
+// FlatMockConfig is an auto-generated flat version of MockConfig.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*MockConfig) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatMockConfig)
+}
+
+// HCL2Spec returns the hcl spec of a MockConfig.
+// This spec is used by HCL to read the fields of MockConfig.
+// The decoded values from this spec will then be applied to a FlatMockConfig.
+func (*FlatMockConfig) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"not_squashed":            &hcldec.AttrSpec{Name: "not_squashed", Type: cty.String, Required: false},
+		"string":                  &hcldec.AttrSpec{Name: "string", Type: cty.String, Required: false},
+		"int":                     &hcldec.AttrSpec{Name: "int", Type: cty.Number, Required: false},
+		"int64":                   &hcldec.AttrSpec{Name: "int64", Type: cty.Number, Required: false},
+		"bool":                    &hcldec.AttrSpec{Name: "bool", Type: cty.Bool, Required: false},
+		"trilean":                 &hcldec.AttrSpec{Name: "trilean", Type: cty.Bool, Required: false},
+		"duration":                &hcldec.AttrSpec{Name: "duration", Type: cty.String, Required: false},
+		"map_string_string":       &hcldec.AttrSpec{Name: "map_string_string", Type: cty.Map(cty.String), Required: false},
+		"slice_string":            &hcldec.AttrSpec{Name: "slice_string", Type: cty.List(cty.String), Required: false},
+		"slice_slice_string":      &hcldec.AttrSpec{Name: "slice_slice_string", Type: cty.List(cty.List(cty.String)), Required: false},
+		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
+		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
+		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
+		"nested":                  &hcldec.BlockSpec{TypeName: "nested", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
+		"nested_slice":            &hcldec.BlockListSpec{TypeName: "nested_slice", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
+	}
+	return s
+}
+
+// FlatMockTag is an auto-generated flat version of MockTag.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatMockTag struct {
+	Key   *string `mapstructure:"key" cty:"key" hcl:"key"`
+	Value *string `mapstructure:"value" cty:"value" hcl:"value"`
+}
+
+// FlatMapstructure returns a new FlatMockTag.
+// FlatMockTag is an auto-generated flat version of MockTag.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*MockTag) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatMockTag)
+}
+
+// HCL2Spec returns the hcl spec of a MockTag.
+// This spec is used by HCL to read the fields of MockTag.
+// The decoded values from this spec will then be applied to a FlatMockTag.
+func (*FlatMockTag) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"key":   &hcldec.AttrSpec{Name: "key", Type: cty.String, Required: false},
+		"value": &hcldec.AttrSpec{Name: "value", Type: cty.String, Required: false},
+	}
+	return s
+}
+
+// FlatNestedMockConfig is an auto-generated flat version of NestedMockConfig.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatNestedMockConfig struct {
+	String               *string              `mapstructure:"string" cty:"string" hcl:"string"`
+	Int                  *int                 `mapstructure:"int" cty:"int" hcl:"int"`
+	Int64                *int64               `mapstructure:"int64" cty:"int64" hcl:"int64"`
+	Bool                 *bool                `mapstructure:"bool" cty:"bool" hcl:"bool"`
+	Trilean              *bool                `mapstructure:"trilean" cty:"trilean" hcl:"trilean"`
+	Duration             *string              `mapstructure:"duration" cty:"duration" hcl:"duration"`
+	MapStringString      map[string]string    `mapstructure:"map_string_string" cty:"map_string_string" hcl:"map_string_string"`
+	SliceString          []string             `mapstructure:"slice_string" cty:"slice_string" hcl:"slice_string"`
+	SliceSliceString     [][]string           `mapstructure:"slice_slice_string" cty:"slice_slice_string" hcl:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
+	NamedString          *NamedString         `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
+	Tags                 []FlatMockTag        `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string              `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
+}
+
+// FlatMapstructure returns a new FlatNestedMockConfig.
+// FlatNestedMockConfig is an auto-generated flat version of NestedMockConfig.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*NestedMockConfig) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatNestedMockConfig)
+}
+
+// HCL2Spec returns the hcl spec of a NestedMockConfig.
+// This spec is used by HCL to read the fields of NestedMockConfig.
+// The decoded values from this spec will then be applied to a FlatNestedMockConfig.
+func (*FlatNestedMockConfig) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"string":                  &hcldec.AttrSpec{Name: "string", Type: cty.String, Required: false},
+		"int":                     &hcldec.AttrSpec{Name: "int", Type: cty.Number, Required: false},
+		"int64":                   &hcldec.AttrSpec{Name: "int64", Type: cty.Number, Required: false},
+		"bool":                    &hcldec.AttrSpec{Name: "bool", Type: cty.Bool, Required: false},
+		"trilean":                 &hcldec.AttrSpec{Name: "trilean", Type: cty.Bool, Required: false},
+		"duration":                &hcldec.AttrSpec{Name: "duration", Type: cty.String, Required: false},
+		"map_string_string":       &hcldec.AttrSpec{Name: "map_string_string", Type: cty.Map(cty.String), Required: false},
+		"slice_string":            &hcldec.AttrSpec{Name: "slice_string", Type: cty.List(cty.String), Required: false},
+		"slice_slice_string":      &hcldec.AttrSpec{Name: "slice_slice_string", Type: cty.List(cty.List(cty.String)), Required: false},
+		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
+		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
+		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
+	}
+	return s
+}

hcl2template/shim/values.go

@@ -4,15 +4,10 @@ import (
 	"fmt"
 	"math/big"
 
+	"github.com/hashicorp/packer-plugin-sdk/hcl2helper"
 	"github.com/zclconf/go-cty/cty"
 )
 
-// UnknownVariableValue is a sentinel value that can be used
-// to denote that the value of a variable is unknown at this time.
-// RawConfig uses this information to build up data about
-// unknown keys.
-const UnknownVariableValue = "74D93920-ED26-11E3-AC10-0800200C9A66"
-
 // ConfigValueFromHCL2 converts a value from HCL2 (really, from the cty dynamic
 // types library that HCL2 uses) to a value type that matches what would've
 // been produced from the HCL-based interpolator for an equivalent structure.
@@ -22,7 +17,7 @@ const UnknownVariableValue = "74D93920-ED26-11E3-AC10-0800200C9A66"
 // need to detect and reject any null values.
 func ConfigValueFromHCL2(v cty.Value) interface{} {
 	if !v.IsKnown() {
-		return UnknownVariableValue
+		return hcl2helper.UnknownVariableValue
 	}
 	if v.IsNull() {
 		return nil
@@ -86,47 +81,104 @@ func ConfigValueFromHCL2(v cty.Value) interface{} {
 	panic(fmt.Errorf("can't convert %#v to config value", v))
 }
 
-// HCL2ValueFromConfigValue is the opposite of ConfigValueFromHCL2: it takes
-// a value as would be returned from the old interpolator and turns it into
-// a cty.Value so it can be used within, for example, an HCL2 EvalContext.
-func HCL2ValueFromConfigValue(v interface{}) cty.Value {
-	if v == nil {
-		return cty.NullVal(cty.DynamicPseudoType)
+// WriteUnknownPlaceholderValues will replace every Unknown value with a equivalent placeholder.
+// This is useful to use before marshaling the value to JSON. The default values are:
+// - string: "<unknown>"
+// - number: 0
+// - bool: false
+// - objects/lists/tuples/sets/maps: empty
+func WriteUnknownPlaceholderValues(v cty.Value) cty.Value {
+	if v.IsNull() {
+		return v
 	}
-	if v == UnknownVariableValue {
-		return cty.DynamicVal
-	}
-
-	switch tv := v.(type) {
-	case bool:
-		return cty.BoolVal(tv)
-	case string:
-		return cty.StringVal(tv)
-	case int:
-		return cty.NumberIntVal(int64(tv))
-	case float64:
-		return cty.NumberFloatVal(tv)
-	case []interface{}:
-		vals := make([]cty.Value, len(tv))
-		for i, ev := range tv {
-			vals[i] = HCL2ValueFromConfigValue(ev)
+	t := v.Type()
+	switch {
+	case t.IsPrimitiveType():
+		if v.IsKnown() {
+			return v
 		}
-		return cty.TupleVal(vals)
-	case []string:
-		vals := make([]cty.Value, len(tv))
-		for i, ev := range tv {
-			vals[i] = cty.StringVal(ev)
+		switch t {
+		case cty.String:
+			return cty.StringVal("<unknown>")
+		case cty.Number:
+			return cty.MustParseNumberVal("0")
+		case cty.Bool:
+			return cty.BoolVal(false)
+		default:
+			panic("unsupported primitive type")
 		}
-		return cty.ListVal(vals)
-	case map[string]interface{}:
-		vals := map[string]cty.Value{}
-		for k, ev := range tv {
-			vals[k] = HCL2ValueFromConfigValue(ev)
+	case t.IsListType():
+		if !v.IsKnown() {
+			return cty.ListValEmpty(t.ElementType())
 		}
-		return cty.ObjectVal(vals)
+		arr := []cty.Value{}
+		it := v.ElementIterator()
+		for it.Next() {
+			_, ev := it.Element()
+			arr = append(arr, WriteUnknownPlaceholderValues(ev))
+		}
+		if len(arr) == 0 {
+			return cty.ListValEmpty(t.ElementType())
+		}
+		return cty.ListVal(arr)
+	case t.IsSetType():
+		if !v.IsKnown() {
+			return cty.SetValEmpty(t.ElementType())
+		}
+		arr := []cty.Value{}
+		it := v.ElementIterator()
+		for it.Next() {
+			_, ev := it.Element()
+			arr = append(arr, WriteUnknownPlaceholderValues(ev))
+		}
+		if len(arr) == 0 {
+			return cty.SetValEmpty(t.ElementType())
+		}
+		return cty.SetVal(arr)
+	case t.IsMapType():
+		if !v.IsKnown() {
+			return cty.MapValEmpty(t.ElementType())
+		}
+		obj := map[string]cty.Value{}
+		it := v.ElementIterator()
+		for it.Next() {
+			ek, ev := it.Element()
+			obj[ek.AsString()] = WriteUnknownPlaceholderValues(ev)
+		}
+		if len(obj) == 0 {
+			return cty.MapValEmpty(t.ElementType())
+		}
+		return cty.MapVal(obj)
+	case t.IsTupleType():
+		if !v.IsKnown() {
+			return cty.EmptyTupleVal
+		}
+		arr := []cty.Value{}
+		it := v.ElementIterator()
+		for it.Next() {
+			_, ev := it.Element()
+			arr = append(arr, WriteUnknownPlaceholderValues(ev))
+		}
+		if len(arr) == 0 {
+			return cty.EmptyTupleVal
+		}
+		return cty.TupleVal(arr)
+	case t.IsObjectType():
+		if !v.IsKnown() {
+			return cty.EmptyObjectVal
+		}
+		obj := map[string]cty.Value{}
+		it := v.ElementIterator()
+		for it.Next() {
+			ek, ev := it.Element()
+			obj[ek.AsString()] = WriteUnknownPlaceholderValues(ev)
+		}
+		if len(obj) == 0 {
+			return cty.EmptyObjectVal
+		}
+		return cty.ObjectVal(obj)
 	default:
-		// HCL/HIL should never generate anything that isn't caught by
-		// the above, so if we get here something has gone very wrong.
-		panic(fmt.Errorf("can't convert %#v to cty.Value", v))
+		// should never happen
+		panic("unknown type")
 	}
 }

hcl2template/shim/values_test.go

@@ -5,6 +5,7 @@ import (
 	"reflect"
 	"testing"
 
+	"github.com/hashicorp/packer-plugin-sdk/hcl2helper"
 	"github.com/zclconf/go-cty/cty"
 )
 
@@ -81,7 +82,7 @@ func TestConfigValueFromHCL2(t *testing.T) {
 		},
 		{
 			cty.UnknownVal(cty.String),
-			UnknownVariableValue,
+			hcl2helper.UnknownVariableValue,
 		},
 	}
 
@@ -94,3 +95,140 @@ func TestConfigValueFromHCL2(t *testing.T) {
 		})
 	}
 }
+
+func TestWriteUnknownPlaceholderValues(t *testing.T) {
+	tests := []struct {
+		Name  string
+		Input cty.Value
+		Want  cty.Value
+	}{
+		{
+			Name:  "Unknown bool",
+			Input: cty.UnknownVal(cty.Bool),
+			Want:  cty.False,
+		},
+		{
+			Name:  "Unknown number",
+			Input: cty.UnknownVal(cty.Number),
+			Want:  cty.NumberIntVal(0),
+		},
+		{
+			Name:  "Unknown string",
+			Input: cty.UnknownVal(cty.String),
+			Want:  cty.StringVal("<unknown>"),
+		},
+		{
+			Name:  "Unknown object",
+			Input: cty.UnknownVal(cty.EmptyObject),
+			Want:  cty.EmptyObjectVal,
+		},
+		{
+			Name: "Object with unknown values",
+			Input: cty.ObjectVal(map[string]cty.Value{
+				"name":    cty.UnknownVal(cty.String),
+				"address": cty.UnknownVal(cty.EmptyObject),
+			}),
+			Want: cty.ObjectVal(map[string]cty.Value{
+				"name":    cty.StringVal("<unknown>"),
+				"address": cty.EmptyObjectVal,
+			}),
+		},
+		{
+			Name:  "Empty object",
+			Input: cty.ObjectVal(map[string]cty.Value{}),
+			Want:  cty.EmptyObjectVal,
+		},
+		{
+			Name:  "Unknown tuple",
+			Input: cty.UnknownVal(cty.EmptyTuple),
+			Want:  cty.EmptyTupleVal,
+		},
+		{
+			Name: "Tuple with unknown values",
+			Input: cty.TupleVal([]cty.Value{
+				cty.UnknownVal(cty.String),
+				cty.UnknownVal(cty.Bool),
+			}),
+			Want: cty.TupleVal([]cty.Value{
+				cty.StringVal("<unknown>"),
+				cty.False,
+			}),
+		},
+		{
+			Name:  "Empty tuple",
+			Input: cty.TupleVal([]cty.Value{}),
+			Want:  cty.EmptyTupleVal,
+		},
+		{
+			Name:  "Unknown list",
+			Input: cty.UnknownVal(cty.List(cty.String)),
+			Want:  cty.ListValEmpty(cty.String),
+		},
+		{
+			Name: "List with unknown values",
+			Input: cty.ListVal([]cty.Value{
+				cty.UnknownVal(cty.String),
+			}),
+			Want: cty.ListVal([]cty.Value{
+				cty.StringVal("<unknown>"),
+			}),
+		},
+		{
+			Name:  "Empty list",
+			Input: cty.ListValEmpty(cty.String),
+			Want:  cty.ListValEmpty(cty.String),
+		},
+		{
+			Name:  "Unknown set",
+			Input: cty.UnknownVal(cty.Set(cty.String)),
+			Want:  cty.SetValEmpty(cty.String),
+		},
+		{
+			Name: "Set with unknown values",
+			Input: cty.SetVal([]cty.Value{
+				cty.UnknownVal(cty.String),
+			}),
+			Want: cty.SetVal([]cty.Value{
+				cty.StringVal("<unknown>"),
+			}),
+		},
+		{
+			Name:  "Empty Set",
+			Input: cty.SetValEmpty(cty.String),
+			Want:  cty.SetValEmpty(cty.String),
+		},
+		{
+			Name:  "Unknown map",
+			Input: cty.UnknownVal(cty.Map(cty.String)),
+			Want:  cty.MapValEmpty(cty.String),
+		},
+		{
+			Name: "Map with unknown values",
+			Input: cty.MapVal(map[string]cty.Value{
+				"name": cty.UnknownVal(cty.String),
+			}),
+			Want: cty.MapVal(map[string]cty.Value{
+				"name": cty.StringVal("<unknown>"),
+			}),
+		},
+		{
+			Name:  "Empty Map",
+			Input: cty.MapValEmpty(cty.String),
+			Want:  cty.MapValEmpty(cty.String),
+		},
+		{
+			Name:  "Null val",
+			Input: cty.NullVal(cty.String),
+			Want:  cty.NullVal(cty.String),
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(t.Name(), func(t *testing.T) {
+			got := WriteUnknownPlaceholderValues(test.Input)
+			if got.Equals(test.Want).False() {
+				t.Errorf("wrong result\ninput: %#v\ngot:   %#v\nwant:  %#v", test.Input, got, test.Want)
+			}
+		})
+	}
+}

hcl2template/testdata/complete/datasource.pkr.hcl

@@ -0,0 +1,3 @@
+data "amazon-ami" "test" {
+  string = "string"
+}

hcl2template/testdata/complete/sources.pkr.hcl

@@ -26,6 +26,8 @@ source "virtualbox-iso" "ubuntu-1204" {
         ["c","d"]
     ]
 
+    data_source = data.amazon-ami.test.string
+
     nested {
         string   = "string"
         int      = 42
@@ -46,6 +48,7 @@ source "virtualbox-iso" "ubuntu-1204" {
             ["a","b"],
             ["c","d"]
         ]
+        data_source = data.amazon-ami.test.string
     }
 
     nested_slice {
@@ -68,6 +71,7 @@ source "virtualbox-iso" "ubuntu-1204" {
             ["a","b"],
             ["c","d"]
         ]
+        data_source = data.amazon-ami.test.string
     }
 
     nested_slice {
@@ -90,5 +94,6 @@ source "virtualbox-iso" "ubuntu-1204" {
             ["a","b"],
             ["c","d"]
         ]
+        data_source = data.amazon-ami.test.string
     }
 }

hcl2template/testdata/complete/variables.pkr.hcl

@@ -22,6 +22,7 @@ variable "availability_zone_names" {
 
 locals {
   feefoo = "${var.foo}_${var.image_id}"
+  data_source = data.amazon-ami.test.string
 }
 
 

hcl2template/testdata/datasources/basic.pkr.hcl

@@ -0,0 +1,87 @@
+data "amazon-ami" "test" {
+  string   = "string"
+  int      = 42
+  int64    = 43
+  bool     = true
+  trilean  = true
+  duration = "10s"
+  map_string_string = {
+    a = "b"
+    c = "d"
+  }
+  slice_string = [
+    "a",
+    "b",
+    "c",
+  ]
+  slice_slice_string = [
+    ["a","b"],
+    ["c","d"]
+  ]
+
+  nested {
+    string   = "string"
+    int      = 42
+    int64    = 43
+    bool     = true
+    trilean  = true
+    duration = "10s"
+    map_string_string = {
+      a = "b"
+      c = "d"
+    }
+    slice_string = [
+      "a",
+      "b",
+      "c",
+    ]
+    slice_slice_string = [
+      ["a","b"],
+      ["c","d"]
+    ]
+  }
+
+  nested_slice {
+    string   = "string"
+    int      = 42
+    int64    = 43
+    bool     = true
+    trilean  = true
+    duration = "10s"
+    map_string_string = {
+      a = "b"
+      c = "d"
+    }
+    slice_string = [
+      "a",
+      "b",
+      "c",
+    ]
+    slice_slice_string = [
+      ["a","b"],
+      ["c","d"]
+    ]
+  }
+
+  nested_slice {
+    string   = "string"
+    int      = 42
+    int64    = 43
+    bool     = true
+    trilean  = true
+    duration = "10s"
+    map_string_string = {
+      a = "b"
+      c = "d"
+    }
+    slice_string = [
+      "a",
+      "b",
+      "c",
+    ]
+    slice_slice_string = [
+      ["a","b"],
+      ["c","d"]
+    ]
+  }
+}

hcl2template/testdata/datasources/duplicate.pkr.hcl

@@ -0,0 +1,2 @@
+data "amazon-ami" "test" {}
+data "amazon-ami" "test" {}

hcl2template/testdata/datasources/inexistent.pkr.hcl

@@ -0,0 +1,3 @@
+data "inexistant" "test" {
+    foo = "bar"
+}

hcl2template/testdata/datasources/unnamed.pkr.hcl

@@ -0,0 +1,3 @@
+data "amazon-ami" {
+    foo = "bar"
+}

hcl2template/testdata/datasources/untyped.pkr.hcl

@@ -0,0 +1,3 @@
+data {
+    foo = "bar"
+}

hcl2template/types.datasource.go

@@ -0,0 +1,146 @@
+package hcl2template
+
+import (
+	"fmt"
+
+	"github.com/hashicorp/hcl/v2"
+	"github.com/hashicorp/hcl/v2/hclsyntax"
+	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
+	"github.com/hashicorp/packer/packer"
+	"github.com/zclconf/go-cty/cty"
+)
+
+// DataBlock references an HCL 'data' block.
+type Datasource struct {
+	Type string
+	Name string
+
+	value cty.Value
+	block *hcl.Block
+}
+
+type DatasourceRef struct {
+	Type string
+	Name string
+}
+
+type Datasources map[DatasourceRef]Datasource
+
+func (data *Datasource) Ref() DatasourceRef {
+	return DatasourceRef{
+		Type: data.Type,
+		Name: data.Name,
+	}
+}
+
+func (ds *Datasources) Values() (map[string]cty.Value, hcl.Diagnostics) {
+	var diags hcl.Diagnostics
+	res := map[string]cty.Value{}
+	valuesMap := map[string]map[string]cty.Value{}
+
+	for ref, datasource := range *ds {
+		if datasource.value == (cty.Value{}) {
+			diags = append(diags, &hcl.Diagnostic{
+				Summary:  fmt.Sprintf("empty value"),
+				Subject:  &datasource.block.DefRange,
+				Severity: hcl.DiagError,
+			})
+			continue
+		}
+		inner := valuesMap[ref.Type]
+		if inner == nil {
+			inner = map[string]cty.Value{}
+		}
+		inner[ref.Name] = datasource.value
+		res[ref.Type] = cty.MapVal(inner)
+
+		// Keeps values of different datasources from same type
+		valuesMap[ref.Type] = inner
+	}
+
+	return res, diags
+}
+
+func (cfg *PackerConfig) startDatasource(dataSourceStore packer.DatasourceStore, ref DatasourceRef) (packersdk.Datasource, hcl.Diagnostics) {
+	var diags hcl.Diagnostics
+	block := cfg.Datasources[ref].block
+
+	if dataSourceStore == nil {
+		diags = append(diags, &hcl.Diagnostic{
+			Summary:  "Unknown " + dataSourceLabel + " type " + ref.Type,
+			Subject:  block.LabelRanges[0].Ptr(),
+			Detail:   fmt.Sprintf("packer does not currently know any data source."),
+			Severity: hcl.DiagError,
+		})
+		return nil, diags
+	}
+
+	if !dataSourceStore.Has(ref.Type) {
+		diags = append(diags, &hcl.Diagnostic{
+			Summary:  "Unknown " + dataSourceLabel + " type " + ref.Type,
+			Subject:  block.LabelRanges[0].Ptr(),
+			Detail:   fmt.Sprintf("known data sources: %v", dataSourceStore.List()),
+			Severity: hcl.DiagError,
+		})
+		return nil, diags
+	}
+
+	datasource, err := dataSourceStore.Start(ref.Type)
+	if err != nil {
+		diags = append(diags, &hcl.Diagnostic{
+			Summary:  err.Error(),
+			Subject:  &block.DefRange,
+			Severity: hcl.DiagError,
+		})
+	}
+	if datasource == nil {
+		diags = append(diags, &hcl.Diagnostic{
+			Summary:  fmt.Sprintf("failed to start datasource plugin %q.%q", ref.Type, ref.Name),
+			Subject:  &block.DefRange,
+			Severity: hcl.DiagError,
+		})
+	}
+	body := block.Body
+	decoded, moreDiags := decodeHCL2Spec(body, cfg.EvalContext(nil), datasource)
+	diags = append(diags, moreDiags...)
+	if moreDiags.HasErrors() {
+		return nil, diags
+	}
+
+	if err := datasource.Configure(decoded); err != nil {
+		diags = append(diags, &hcl.Diagnostic{
+			Summary:  err.Error(),
+			Subject:  &block.DefRange,
+			Severity: hcl.DiagError,
+		})
+	}
+	return datasource, diags
+}
+
+func (p *Parser) decodeDataBlock(block *hcl.Block) (*Datasource, hcl.Diagnostics) {
+	var diags hcl.Diagnostics
+	r := &Datasource{
+		Type:  block.Labels[0],
+		Name:  block.Labels[1],
+		block: block,
+	}
+
+	if !hclsyntax.ValidIdentifier(r.Type) {
+		diags = append(diags, &hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Invalid data source name",
+			Detail:   badIdentifierDetail,
+			Subject:  &block.LabelRanges[0],
+		})
+	}
+	if !hclsyntax.ValidIdentifier(r.Name) {
+		diags = append(diags, &hcl.Diagnostic{
+			Severity: hcl.DiagError,
+			Summary:  "Invalid data resource name",
+			Detail:   badIdentifierDetail,
+			Subject:  &block.LabelRanges[1],
+		})
+	}
+
+	return r, diags
+}

hcl2template/types.datasource_test.go

@@ -0,0 +1,93 @@
+package hcl2template
+
+import (
+	"path/filepath"
+	"testing"
+
+	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
+)
+
+func TestParse_datasource(t *testing.T) {
+	defaultParser := getBasicParser()
+
+	tests := []parseTest{
+		{"two basic datasources",
+			defaultParser,
+			parseTestArgs{"testdata/datasources/basic.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "datasources"),
+				Datasources: Datasources{
+					{
+						Type: "amazon-ami",
+						Name: "test",
+					}: {
+						Type: "amazon-ami",
+						Name: "test",
+					},
+				},
+			},
+			false, false,
+			[]packersdk.Build{},
+			false,
+		},
+		{"untyped datasource",
+			defaultParser,
+			parseTestArgs{"testdata/datasources/untyped.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "datasources"),
+			},
+			true, true,
+			nil,
+			false,
+		},
+		{"unnamed source",
+			defaultParser,
+			parseTestArgs{"testdata/datasources/unnamed.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "datasources"),
+			},
+			true, true,
+			nil,
+			false,
+		},
+		{"inexistent source",
+			defaultParser,
+			parseTestArgs{"testdata/datasources/inexistent.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "datasources"),
+				Datasources: Datasources{
+					{
+						Type: "inexistant",
+						Name: "test",
+					}: {
+						Type: "inexistant",
+						Name: "test",
+					},
+				},
+			},
+			true, true,
+			nil,
+			false,
+		},
+		{"duplicate source",
+			defaultParser,
+			parseTestArgs{"testdata/datasources/duplicate.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "datasources"),
+				Datasources: Datasources{
+					{
+						Type: "amazon-ami",
+						Name: "test",
+					}: {
+						Type: "amazon-ami",
+						Name: "test",
+					},
+				},
+			},
+			true, true,
+			nil,
+			false,
+		},
+	}
+	testParse(t, tests)
+}

hcl2template/types.packer_config.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/gobwas/glob"
 	"github.com/hashicorp/hcl/v2"
+	"github.com/hashicorp/hcl/v2/hcldec"
 	"github.com/hashicorp/hcl/v2/hclsyntax"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
 	pkrfunction "github.com/hashicorp/packer/hcl2template/function"
@@ -40,6 +41,8 @@ type PackerConfig struct {
 	InputVariables Variables
 	LocalVariables Variables
 
+	Datasources Datasources
+
 	LocalBlocks []*LocalBlock
 
 	ValidationOptions
@@ -47,11 +50,10 @@ type PackerConfig struct {
 	// Builds is the list of Build blocks defined in the config files.
 	Builds Builds
 
-	builderSchemas packer.BuilderStore
-
-	provisionersSchemas packer.ProvisionerStore
-
+	builderSchemas        packer.BuilderStore
+	provisionersSchemas   packer.ProvisionerStore
 	postProcessorsSchemas packer.PostProcessorStore
+	datasourceSchemas     packer.DatasourceStore
 
 	except []glob.Glob
 	only   []glob.Glob
@@ -71,6 +73,7 @@ const (
 	sourcesAccessor        = "source"
 	buildAccessor          = "build"
 	packerAccessor         = "packer"
+	dataAccessor           = "data"
 )
 
 // EvalContext returns the *hcl.EvalContext that will be passed to an hcl
@@ -79,6 +82,7 @@ const (
 func (cfg *PackerConfig) EvalContext(variables map[string]cty.Value) *hcl.EvalContext {
 	inputVariables, _ := cfg.InputVariables.Values()
 	localVariables, _ := cfg.LocalVariables.Values()
+	datasourceVariables, _ := cfg.Datasources.Values()
 	ectx := &hcl.EvalContext{
 		Functions: Functions(cfg.Basedir),
 		Variables: map[string]cty.Value{
@@ -96,6 +100,7 @@ func (cfg *PackerConfig) EvalContext(variables map[string]cty.Value) *hcl.EvalCo
 				"cwd":  cty.StringVal(strings.ReplaceAll(cfg.Cwd, `\`, `/`)),
 				"root": cty.StringVal(strings.ReplaceAll(cfg.Basedir, `\`, `/`)),
 			}),
+			dataAccessor: cty.ObjectVal(datasourceVariables),
 		},
 	}
 	for k, v := range variables {
@@ -235,6 +240,43 @@ func (c *PackerConfig) evaluateLocalVariable(local *LocalBlock) hcl.Diagnostics
 	return diags
 }
 
+func (cfg *PackerConfig) evaluateDatasources(skipExecution bool) hcl.Diagnostics {
+	var diags hcl.Diagnostics
+
+	for ref, ds := range cfg.Datasources {
+		if ds.value != (cty.Value{}) {
+			continue
+		}
+
+		datasource, startDiags := cfg.startDatasource(cfg.datasourceSchemas, ref)
+		diags = append(diags, startDiags...)
+		if diags.HasErrors() {
+			continue
+		}
+
+		if skipExecution {
+			placeholderValue := cty.UnknownVal(hcldec.ImpliedType(datasource.OutputSpec()))
+			ds.value = placeholderValue
+			cfg.Datasources[ref] = ds
+			continue
+		}
+
+		realValue, err := datasource.Execute()
+		if err != nil {
+			diags = append(diags, &hcl.Diagnostic{
+				Summary:  err.Error(),
+				Subject:  &cfg.Datasources[ref].block.DefRange,
+				Severity: hcl.DiagError,
+			})
+			continue
+		}
+		ds.value = realValue
+		cfg.Datasources[ref] = ds
+	}
+
+	return diags
+}
+
 // getCoreBuildProvisioners takes a list of provisioner block, starts according
 // provisioners and sends parsed HCL2 over to it.
 func (cfg *PackerConfig) getCoreBuildProvisioners(source SourceBlock, blocks []*ProvisionerBlock, ectx *hcl.EvalContext) ([]packer.CoreBuildProvisioner, hcl.Diagnostics) {

hcl2template/types.packer_config_test.go

@@ -59,6 +59,11 @@ func TestParser_complete(t *testing.T) {
 						Values: []VariableAssignment{{From: "default", Value: cty.StringVal("value_image-id-default")}},
 						Type:   cty.String,
 					},
+					"data_source": &Variable{
+						Name:   "data_source",
+						Values: []VariableAssignment{{From: "default", Value: cty.StringVal("string")}},
+						Type:   cty.String,
+					},
 					"standard_tags": &Variable{
 						Name: "standard_tags",
 						Values: []VariableAssignment{{From: "default",
@@ -100,6 +105,13 @@ func TestParser_complete(t *testing.T) {
 						}),
 					},
 				},
+				Datasources: Datasources{
+					DatasourceRef{Type: "amazon-ami", Name: "test"}: Datasource{
+						Type:  "amazon-ami",
+						Name:  "test",
+						value: cty.StringVal("foo"),
+					},
+				},
 				Sources: map[SourceRef]SourceBlock{
 					refVBIsoUbuntu1204:  {Type: "virtualbox-iso", Name: "ubuntu-1204"},
 					refAWSEBSUbuntu1604: {Type: "amazon-ebs", Name: "ubuntu-1604"},

hcl2template/types.source.go

@@ -7,6 +7,7 @@ import (
 	"github.com/hashicorp/hcl/v2"
 	"github.com/hashicorp/hcl/v2/gohcl"
 	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
+	hcl2shim "github.com/hashicorp/packer/hcl2template/shim"
 	"github.com/hashicorp/packer/packer"
 	"github.com/zclconf/go-cty/cty"
 )
@@ -113,6 +114,12 @@ func (cfg *PackerConfig) startBuilder(source SourceBlock, ectx *hcl.EvalContext,
 		return nil, diags, nil
 	}
 
+	// In case of cty.Unknown values, this will write a equivalent placeholder of the same type
+	// Unknown types are not recognized by the json marshal during the RPC call and we have to do this here
+	// to avoid json parsing failures when running the validate command.
+	// We don't do this before so we can validate if variable types matches correctly on decodeHCL2Spec.
+	decoded = hcl2shim.WriteUnknownPlaceholderValues(decoded)
+
 	// Note: HCL prepares inside of the Start func, but Json does not. Json
 	// builds are instead prepared only in command/build.go
 	// TODO: either make json prepare when plugins are loaded, or make HCL

main.go

@@ -230,6 +230,7 @@ func wrappedMain() int {
 				BuilderStore:       config.Builders,
 				ProvisionerStore:   config.Provisioners,
 				PostProcessorStore: config.PostProcessors,
+				DatasourceStore:    config.Datasources,
 			},
 			Version: version.Version,
 		},
@@ -310,10 +311,11 @@ func loadConfig() (*config, error) {
 	}
 
 	// Copy plugins to general list
-	builders, provisioners, postProcessors := config.Plugins.GetPlugins()
-	config.Builders = builders
-	config.Provisioners = provisioners
-	config.PostProcessors = postProcessors
+	plugins := config.Plugins.GetPlugins()
+	config.Builders = plugins.Builders
+	config.Provisioners = plugins.Provisioners
+	config.PostProcessors = plugins.PostProcessors
+	config.Datasources = plugins.DataSources
 
 	// Finally, try to use an internal plugin. Note that this will not override
 	// any previously-loaded plugins.

packer/core.go

@@ -81,6 +81,11 @@ type PostProcessorStore interface {
 	Start(name string) (packersdk.PostProcessor, error)
 }
 
+type DatasourceStore interface {
+	BasicStore
+	Start(name string) (packersdk.Datasource, error)
+}
+
 // ComponentFinder is a struct that contains the various function
 // pointers necessary to look up components of Packer such as builders,
 // commands, etc.
@@ -91,6 +96,7 @@ type ComponentFinder struct {
 	BuilderStore       BuilderStore
 	ProvisionerStore   ProvisionerStore
 	PostProcessorStore PostProcessorStore
+	DatasourceStore    DatasourceStore
 }
 
 // NewCore creates a new Core.

packer/plugin/client.go

@@ -173,6 +173,16 @@ func (c *Client) Provisioner() (packersdk.Provisioner, error) {
 	return &cmdProvisioner{client.Provisioner(), c}, nil
 }
 
+// Returns a data source implementation that is communicating over this
+// client. If the client hasn't been started, this will start it.
+func (c *Client) Datasource() (packersdk.Datasource, error) {
+	client, err := c.Client()
+	if err != nil {
+		return nil, err
+	}
+	return &cmdDatasource{client.Datasource(), c}, nil
+}
+
 // End the executing subprocess (if it is running) and perform any cleanup
 // tasks necessary such as capturing any remaining logs and so on.
 //

packer/plugin/datasource.go

@@ -0,0 +1,58 @@
+package plugin
+
+import (
+	"log"
+
+	"github.com/hashicorp/hcl/v2/hcldec"
+	packersdk "github.com/hashicorp/packer-plugin-sdk/packer"
+	"github.com/zclconf/go-cty/cty"
+)
+
+type cmdDatasource struct {
+	d      packersdk.Datasource
+	client *Client
+}
+
+func (d *cmdDatasource) ConfigSpec() hcldec.ObjectSpec {
+	defer func() {
+		r := recover()
+		d.checkExit(r, nil)
+	}()
+
+	return d.d.ConfigSpec()
+}
+
+func (d *cmdDatasource) Configure(configs ...interface{}) error {
+	defer func() {
+		r := recover()
+		d.checkExit(r, nil)
+	}()
+
+	return d.d.Configure(configs...)
+}
+
+func (d *cmdDatasource) OutputSpec() hcldec.ObjectSpec {
+	defer func() {
+		r := recover()
+		d.checkExit(r, nil)
+	}()
+
+	return d.d.OutputSpec()
+}
+
+func (d *cmdDatasource) Execute() (cty.Value, error) {
+	defer func() {
+		r := recover()
+		d.checkExit(r, nil)
+	}()
+
+	return d.d.Execute()
+}
+
+func (d *cmdDatasource) checkExit(p interface{}, cb func()) {
+	if d.client.Exited() && cb != nil {
+		cb()
+	} else if p != nil && !Killed {
+		log.Panic(p)
+	}
+}

packer/plugin/datasource_test.go

@@ -0,0 +1,26 @@
+package plugin
+
+import (
+	"os/exec"
+	"testing"
+)
+
+func TestDatasource_NoExist(t *testing.T) {
+	c := NewClient(&ClientConfig{Cmd: exec.Command("i-should-not-exist")})
+	defer c.Kill()
+
+	_, err := c.Datasource()
+	if err == nil {
+		t.Fatal("should have error")
+	}
+}
+
+func TestDatasource_Good(t *testing.T) {
+	c := NewClient(&ClientConfig{Cmd: helperProcess("datasource")})
+	defer c.Kill()
+
+	_, err := c.Datasource()
+	if err != nil {
+		t.Fatalf("should not have error: %s", err)
+	}
+}

packer/plugin/discover.go

@@ -26,10 +26,23 @@ type Config struct {
 	builders       packer.MapOfBuilder
 	provisioners   packer.MapOfProvisioner
 	postProcessors packer.MapOfPostProcessor
+	dataSources    packer.MapOfDatasource
 }
 
-func (c *Config) GetPlugins() (packer.MapOfBuilder, packer.MapOfProvisioner, packer.MapOfPostProcessor) {
-	return c.builders, c.provisioners, c.postProcessors
+type Plugins struct {
+	Builders       packer.MapOfBuilder
+	Provisioners   packer.MapOfProvisioner
+	PostProcessors packer.MapOfPostProcessor
+	DataSources    packer.MapOfDatasource
+}
+
+func (c *Config) GetPlugins() Plugins {
+	return Plugins{
+		Builders:       c.builders,
+		Provisioners:   c.provisioners,
+		PostProcessors: c.postProcessors,
+		DataSources:    c.dataSources,
+	}
 }
 
 // Discover discovers plugins.
@@ -49,6 +62,9 @@ func (c *Config) Discover() error {
 	if c.postProcessors == nil {
 		c.postProcessors = packer.MapOfPostProcessor{}
 	}
+	if c.dataSources == nil {
+		c.dataSources = packer.MapOfDatasource{}
+	}
 
 	// If we are already inside a plugin process we should not need to
 	// discover anything.
@@ -161,6 +177,22 @@ func (c *Config) discoverExternalComponents(path string) error {
 		log.Printf("using external provisioners %v", externallyUsed)
 	}
 
+	pluginPaths, err = c.discoverSingle(filepath.Join(path, "packer-datasource-*"))
+	if err != nil {
+		return err
+	}
+	for pluginName, pluginPath := range pluginPaths {
+		newPath := pluginPath // this needs to be stored in a new variable for the func below
+		c.dataSources[pluginName] = func() (packersdk.Datasource, error) {
+			return c.Client(newPath).Datasource()
+		}
+		externallyUsed = append(externallyUsed, pluginName)
+	}
+	if len(externallyUsed) > 0 {
+		sort.Strings(externallyUsed)
+		log.Printf("using external datasource %v", externallyUsed)
+	}
+
 	pluginPaths, err = c.discoverSingle(filepath.Join(path, "packer-plugin-*"))
 	if err != nil {
 		return err
@@ -279,6 +311,16 @@ func (c *Config) discoverMultiPlugin(pluginName, pluginPath string) error {
 		log.Printf("found external %v provisioner from %s plugin", desc.Provisioners, pluginName)
 	}
 
+	for _, datasourceName := range desc.Datasources {
+		datasourceName := datasourceName // copy to avoid pointer overwrite issue
+		c.dataSources[pluginPrefix+datasourceName] = func() (packersdk.Datasource, error) {
+			return c.Client(pluginPath, "start", "datasource", datasourceName).Datasource()
+		}
+	}
+	if len(desc.Datasources) > 0 {
+		log.Printf("found external %v datasource from %s plugin", desc.Datasources, pluginName)
+	}
+
 	return nil
 }
 

packer/plugin/discover_test.go

@@ -111,6 +111,49 @@ func TestEnvVarPackerPluginPath_MultiplePaths(t *testing.T) {
 	}
 }
 
+func TestDiscoverDatasource(t *testing.T) {
+	// Create a temporary directory to store plugins in
+	dir, _, cleanUpFunc, err := generateFakePlugins("custom_plugin_dir",
+		[]string{"packer-datasource-partyparrot"})
+	if err != nil {
+		t.Fatalf("Error creating fake custom plugins: %s", err)
+	}
+
+	defer cleanUpFunc()
+
+	pathsep := ":"
+	if runtime.GOOS == "windows" {
+		pathsep = ";"
+	}
+
+	// Create a second dir to look in that will be empty
+	decoyDir, err := ioutil.TempDir("", "decoy")
+	if err != nil {
+		t.Fatalf("Failed to create a temporary test dir.")
+	}
+	defer os.Remove(decoyDir)
+
+	pluginPath := dir + pathsep + decoyDir
+
+	// Add temp dir to path.
+	os.Setenv("PACKER_PLUGIN_PATH", pluginPath)
+	defer os.Unsetenv("PACKER_PLUGIN_PATH")
+
+	config := newConfig()
+
+	err = config.Discover()
+	if err != nil {
+		t.Fatalf("Should not have errored: %s", err)
+	}
+
+	if len(config.dataSources) == 0 {
+		t.Fatalf("Should have found partyparrot datasource")
+	}
+	if _, ok := config.dataSources["partyparrot"]; !ok {
+		t.Fatalf("Should have found partyparrot datasource.")
+	}
+}
+
 func generateFakePlugins(dirname string, pluginNames []string) (string, []string, func(), error) {
 	dir, err := ioutil.TempDir("", dirname)
 	if err != nil {
@@ -268,6 +311,11 @@ var (
 				"smoke": nil,
 			},
 		},
+		"data": pluginsdk.Set{
+			Datasources: map[string]packersdk.Datasource{
+				"source": nil,
+			},
+		},
 	}
 
 	defaultNameMock = map[string]pluginsdk.Set{
@@ -334,6 +382,12 @@ func Test_multiplugin_describe(t *testing.T) {
 				t.Fatalf("expected to find post-processor %q", expectedPostProcessorName)
 			}
 		}
+		for mockDatasourceName := range plugin.Datasources {
+			expectedDatasourceName := mockPluginName + "-" + mockDatasourceName
+			if _, found := c.dataSources[expectedDatasourceName]; !found {
+				t.Fatalf("expected to find datasource %q", expectedDatasourceName)
+			}
+		}
 	}
 }
 

packer/plugin/plugin_test.go

@@ -108,6 +108,18 @@ func TestHelperProcess(*testing.T) {
 			os.Exit(1)
 		}
 		server.Serve()
+	case "datasource":
+		server, err := pluginsdk.Server()
+		if err != nil {
+			log.Printf("[ERR] %s", err)
+			os.Exit(1)
+		}
+		err = server.RegisterDatasource(new(packersdk.MockDatasource))
+		if err != nil {
+			log.Printf("[ERR] %s", err)
+			os.Exit(1)
+		}
+		server.Serve()
 	case "start-timeout":
 		time.Sleep(1 * time.Minute)
 		os.Exit(1)

packer/run_interfaces.go

@@ -27,9 +27,15 @@ type Evaluator interface {
 	EvaluateExpression(expr string) (output string, exit bool, diags hcl.Diagnostics)
 }
 
+type InitializeOptions struct {
+	// When set, the execution of datasources will be skipped and the datasource will provide
+	// a output spec that will be used for validation only.
+	SkipDatasourcesExecution bool
+}
+
 // The packer.Handler handles all Packer things.
 type Handler interface {
-	Initialize() hcl.Diagnostics
+	Initialize(InitializeOptions) hcl.Diagnostics
 	Evaluator
 	BuildGetter
 	ConfigFixer

scripts/generate-plugins.go

@@ -43,12 +43,18 @@ func main() {
 		log.Fatalf("Failed to discover post processors: %s", err)
 	}
 
+	datasources, err := discoverDatasources()
+	if err != nil {
+		log.Fatalf("Failed to discover Datasources: %s", err)
+	}
+
 	// Do some simple code generation and templating
 	output := source
-	output = strings.Replace(output, "IMPORTS", makeImports(builders, provisioners, postProcessors), 1)
+	output = strings.Replace(output, "IMPORTS", makeImports(builders, provisioners, postProcessors, datasources), 1)
 	output = strings.Replace(output, "BUILDERS", makeMap("Builders", "Builder", builders), 1)
 	output = strings.Replace(output, "PROVISIONERS", makeMap("Provisioners", "Provisioner", provisioners), 1)
 	output = strings.Replace(output, "POSTPROCESSORS", makeMap("PostProcessors", "PostProcessor", postProcessors), 1)
+	output = strings.Replace(output, "DATASOURCES", makeMap("Datasources", "Datasource", datasources), 1)
 
 	// TODO sort the lists of plugins so we are not subjected to random OS ordering of the plugin lists
 	// TODO format the file
@@ -105,7 +111,7 @@ func makeMap(varName, varType string, items []plugin) string {
 	return output
 }
 
-func makeImports(builders, provisioners, postProcessors []plugin) string {
+func makeImports(builders, provisioners, postProcessors, Datasources []plugin) string {
 	plugins := []string{}
 
 	for _, builder := range builders {
@@ -120,6 +126,10 @@ func makeImports(builders, provisioners, postProcessors []plugin) string {
 		plugins = append(plugins, fmt.Sprintf("\t%s \"github.com/hashicorp/packer/%s\"\n", postProcessor.ImportName, filepath.ToSlash(postProcessor.Path)))
 	}
 
+	for _, datasource := range Datasources {
+		plugins = append(plugins, fmt.Sprintf("\t%s \"github.com/hashicorp/packer/%s\"\n", datasource.ImportName, filepath.ToSlash(datasource.Path)))
+	}
+
 	// Make things pretty
 	sort.Strings(plugins)
 
@@ -229,6 +239,12 @@ func discoverBuilders() ([]plugin, error) {
 	return discoverTypesInPath(path, typeID)
 }
 
+func discoverDatasources() ([]plugin, error) {
+	path := "./datasource"
+	typeID := "Datasource"
+	return discoverTypesInPath(path, typeID)
+}
+
 func discoverProvisioners() ([]plugin, error) {
 	path := "./provisioner"
 	typeID := "Provisioner"
@@ -270,7 +286,9 @@ PROVISIONERS
 
 POSTPROCESSORS
 
-var pluginRegexp = regexp.MustCompile("packer-(builder|post-processor|provisioner)-(.+)")
+DATASOURCES
+
+var pluginRegexp = regexp.MustCompile("packer-(builder|post-processor|provisioner|datasource)-(.+)")
 
 func (c *PluginCommand) Run(args []string) int {
 	// This is an internal call (users should not call this directly) so we're
@@ -319,6 +337,13 @@ func (c *PluginCommand) Run(args []string) int {
 			return 1
 		}
 		server.RegisterPostProcessor(postProcessor)
+	case "datasource":
+		datasource, found := Datasources[pluginName]
+		if !found {
+			c.Ui.Error(fmt.Sprintf("Could not load datasource: %s", pluginName))
+			return 1
+		}
+		server.RegisterDatasource(datasource)
 	}
 
 	server.Serve()

vendor/github.com/hashicorp/packer-plugin-sdk/acctest/datasources.go

@@ -0,0 +1,102 @@
+package acctest
+
+import (
+	"bytes"
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+)
+
+// DatasourceTestCase is a single set of tests to run for a data source.
+// A DatasourceTestCase should generally map 1:1 to each test method for your
+// acceptance tests.
+type DatasourceTestCase struct {
+	// Check is called after this step is executed in order to test that
+	// the step executed successfully. If this is not set, then the next
+	// step will be called
+	Check func(*exec.Cmd, string) error
+	// Name is the name of the test case. Be simple but unique and descriptive.
+	Name string
+	// Setup, if non-nil, will be called once before the test case
+	// runs. This can be used for some setup like setting environment
+	// variables, or for validation prior to the
+	// test running. For example, you can use this to make sure certain
+	// binaries are installed, or text fixtures are in place.
+	Setup func() error
+	// Teardown will be called before the test case is over regardless
+	// of if the test succeeded or failed. This should return an error
+	// in the case that the test can't guarantee all resources were
+	// properly cleaned up.
+	Teardown TestTeardownFunc
+	// Template is the testing HCL2 template to use.
+	Template string
+	// Type is the type of data source.
+	Type string
+}
+
+//nolint:errcheck
+func TestDatasource(t *testing.T, testCase *DatasourceTestCase) {
+	if os.Getenv(TestEnvVar) == "" {
+		t.Skip(fmt.Sprintf(
+			"Acceptance tests skipped unless env '%s' set",
+			TestEnvVar))
+		return
+	}
+
+	logfile := fmt.Sprintf("packer_log_%s.txt", testCase.Name)
+	templatePath := fmt.Sprintf("./%s.pkr.hcl", testCase.Name)
+
+	// Write config hcl2 template
+	out := bytes.NewBuffer(nil)
+	fmt.Fprintf(out, testCase.Template)
+	outputFile, err := os.Create(templatePath)
+	if err != nil {
+		t.Fatalf("bad: failed to create template file: %s", err.Error())
+	}
+	_, err = outputFile.Write(out.Bytes())
+	if err != nil {
+		t.Fatalf("bad: failed to write template file: %s", err.Error())
+	}
+	outputFile.Sync()
+
+	// Make sure packer is installed:
+	packerbin, err := exec.LookPath("packer")
+	if err != nil {
+		t.Fatalf("Couldn't find packer binary installed on system: %s", err.Error())
+	}
+	// Run build
+	buildCommand := exec.Command(packerbin, "build", "--machine-readable", templatePath)
+	buildCommand.Env = append(buildCommand.Env, os.Environ()...)
+	buildCommand.Env = append(buildCommand.Env, "PACKER_LOG=1",
+		fmt.Sprintf("PACKER_LOG_PATH=%s", logfile))
+	buildCommand.Run()
+
+	// Check for test custom pass/fail before we clean up
+	var checkErr error
+	if testCase.Check != nil {
+		checkErr = testCase.Check(buildCommand, logfile)
+	}
+	// Clean up anything created in data source run
+	if testCase.Teardown != nil {
+		cleanErr := testCase.Teardown()
+		if cleanErr != nil {
+			log.Printf("bad: failed to clean up test-created resources: %s", cleanErr.Error())
+		}
+	}
+
+	// Fail test if check failed.
+	if checkErr != nil {
+		cwd, _ := os.Getwd()
+		t.Fatalf(fmt.Sprintf("Error running data source acceptance"+
+			" tests: %s\nLogs can be found at %s\nand the "+
+			"acceptance test template can be found at %s",
+			checkErr.Error(), filepath.Join(cwd, logfile),
+			filepath.Join(cwd, templatePath)))
+	} else {
+		os.Remove(templatePath)
+		os.Remove(logfile)
+	}
+}

vendor/github.com/hashicorp/packer-plugin-sdk/hcl2helper/doc.go

@@ -0,0 +1,4 @@
+/*
+Package hcl2helper provides helper functions for parsing or getting hcl2 types to and from a Packer plugin config.
+*/
+package hcl2helper

vendor/github.com/hashicorp/packer-plugin-sdk/hcl2helper/mock.go

@@ -0,0 +1,40 @@
+//go:generate mapstructure-to-hcl2 -type MockConfig,NestedMockConfig,MockTag
+
+package hcl2helper
+
+import (
+	"time"
+
+	"github.com/hashicorp/packer-plugin-sdk/template/config"
+)
+
+type NestedMockConfig struct {
+	String               string               `mapstructure:"string"`
+	Int                  int                  `mapstructure:"int"`
+	Int64                int64                `mapstructure:"int64"`
+	Bool                 bool                 `mapstructure:"bool"`
+	Trilean              config.Trilean       `mapstructure:"trilean"`
+	Duration             time.Duration        `mapstructure:"duration"`
+	MapStringString      map[string]string    `mapstructure:"map_string_string"`
+	SliceString          []string             `mapstructure:"slice_string"`
+	SliceSliceString     [][]string           `mapstructure:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string"`
+	NamedString          NamedString          `mapstructure:"named_string"`
+	Tags                 []MockTag            `mapstructure:"tag"`
+	Datasource           string               `mapstructure:"data_source"`
+}
+
+type MockTag struct {
+	Key   string `mapstructure:"key"`
+	Value string `mapstructure:"value"`
+}
+
+type MockConfig struct {
+	NotSquashed      string `mapstructure:"not_squashed"`
+	NestedMockConfig `mapstructure:",squash"`
+	Nested           NestedMockConfig   `mapstructure:"nested"`
+	NestedSlice      []NestedMockConfig `mapstructure:"nested_slice"`
+}
+
+type NamedMapStringString map[string]string
+type NamedString string

vendor/github.com/hashicorp/packer-plugin-sdk/hcl2helper/mock.hcl2spec.go

@@ -0,0 +1,133 @@
+// Code generated by "mapstructure-to-hcl2 -type MockConfig,NestedMockConfig,MockTag"; DO NOT EDIT.
+
+package hcl2helper
+
+import (
+	"github.com/hashicorp/hcl/v2/hcldec"
+	"github.com/zclconf/go-cty/cty"
+)
+
+// FlatMockConfig is an auto-generated flat version of MockConfig.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatMockConfig struct {
+	NotSquashed          *string                `mapstructure:"not_squashed" cty:"not_squashed" hcl:"not_squashed"`
+	String               *string                `mapstructure:"string" cty:"string" hcl:"string"`
+	Int                  *int                   `mapstructure:"int" cty:"int" hcl:"int"`
+	Int64                *int64                 `mapstructure:"int64" cty:"int64" hcl:"int64"`
+	Bool                 *bool                  `mapstructure:"bool" cty:"bool" hcl:"bool"`
+	Trilean              *bool                  `mapstructure:"trilean" cty:"trilean" hcl:"trilean"`
+	Duration             *string                `mapstructure:"duration" cty:"duration" hcl:"duration"`
+	MapStringString      map[string]string      `mapstructure:"map_string_string" cty:"map_string_string" hcl:"map_string_string"`
+	SliceString          []string               `mapstructure:"slice_string" cty:"slice_string" hcl:"slice_string"`
+	SliceSliceString     [][]string             `mapstructure:"slice_slice_string" cty:"slice_slice_string" hcl:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString   `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
+	NamedString          *NamedString           `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
+	Tags                 []FlatMockTag          `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string                `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
+	Nested               *FlatNestedMockConfig  `mapstructure:"nested" cty:"nested" hcl:"nested"`
+	NestedSlice          []FlatNestedMockConfig `mapstructure:"nested_slice" cty:"nested_slice" hcl:"nested_slice"`
+}
+
+// FlatMapstructure returns a new FlatMockConfig.
+// FlatMockConfig is an auto-generated flat version of MockConfig.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*MockConfig) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatMockConfig)
+}
+
+// HCL2Spec returns the hcl spec of a MockConfig.
+// This spec is used by HCL to read the fields of MockConfig.
+// The decoded values from this spec will then be applied to a FlatMockConfig.
+func (*FlatMockConfig) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"not_squashed":            &hcldec.AttrSpec{Name: "not_squashed", Type: cty.String, Required: false},
+		"string":                  &hcldec.AttrSpec{Name: "string", Type: cty.String, Required: false},
+		"int":                     &hcldec.AttrSpec{Name: "int", Type: cty.Number, Required: false},
+		"int64":                   &hcldec.AttrSpec{Name: "int64", Type: cty.Number, Required: false},
+		"bool":                    &hcldec.AttrSpec{Name: "bool", Type: cty.Bool, Required: false},
+		"trilean":                 &hcldec.AttrSpec{Name: "trilean", Type: cty.Bool, Required: false},
+		"duration":                &hcldec.AttrSpec{Name: "duration", Type: cty.String, Required: false},
+		"map_string_string":       &hcldec.AttrSpec{Name: "map_string_string", Type: cty.Map(cty.String), Required: false},
+		"slice_string":            &hcldec.AttrSpec{Name: "slice_string", Type: cty.List(cty.String), Required: false},
+		"slice_slice_string":      &hcldec.AttrSpec{Name: "slice_slice_string", Type: cty.List(cty.List(cty.String)), Required: false},
+		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
+		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
+		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
+		"nested":                  &hcldec.BlockSpec{TypeName: "nested", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
+		"nested_slice":            &hcldec.BlockListSpec{TypeName: "nested_slice", Nested: hcldec.ObjectSpec((*FlatNestedMockConfig)(nil).HCL2Spec())},
+	}
+	return s
+}
+
+// FlatMockTag is an auto-generated flat version of MockTag.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatMockTag struct {
+	Key   *string `mapstructure:"key" cty:"key" hcl:"key"`
+	Value *string `mapstructure:"value" cty:"value" hcl:"value"`
+}
+
+// FlatMapstructure returns a new FlatMockTag.
+// FlatMockTag is an auto-generated flat version of MockTag.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*MockTag) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatMockTag)
+}
+
+// HCL2Spec returns the hcl spec of a MockTag.
+// This spec is used by HCL to read the fields of MockTag.
+// The decoded values from this spec will then be applied to a FlatMockTag.
+func (*FlatMockTag) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"key":   &hcldec.AttrSpec{Name: "key", Type: cty.String, Required: false},
+		"value": &hcldec.AttrSpec{Name: "value", Type: cty.String, Required: false},
+	}
+	return s
+}
+
+// FlatNestedMockConfig is an auto-generated flat version of NestedMockConfig.
+// Where the contents of a field with a `mapstructure:,squash` tag are bubbled up.
+type FlatNestedMockConfig struct {
+	String               *string              `mapstructure:"string" cty:"string" hcl:"string"`
+	Int                  *int                 `mapstructure:"int" cty:"int" hcl:"int"`
+	Int64                *int64               `mapstructure:"int64" cty:"int64" hcl:"int64"`
+	Bool                 *bool                `mapstructure:"bool" cty:"bool" hcl:"bool"`
+	Trilean              *bool                `mapstructure:"trilean" cty:"trilean" hcl:"trilean"`
+	Duration             *string              `mapstructure:"duration" cty:"duration" hcl:"duration"`
+	MapStringString      map[string]string    `mapstructure:"map_string_string" cty:"map_string_string" hcl:"map_string_string"`
+	SliceString          []string             `mapstructure:"slice_string" cty:"slice_string" hcl:"slice_string"`
+	SliceSliceString     [][]string           `mapstructure:"slice_slice_string" cty:"slice_slice_string" hcl:"slice_slice_string"`
+	NamedMapStringString NamedMapStringString `mapstructure:"named_map_string_string" cty:"named_map_string_string" hcl:"named_map_string_string"`
+	NamedString          *NamedString         `mapstructure:"named_string" cty:"named_string" hcl:"named_string"`
+	Tags                 []FlatMockTag        `mapstructure:"tag" cty:"tag" hcl:"tag"`
+	Datasource           *string              `mapstructure:"data_source" cty:"data_source" hcl:"data_source"`
+}
+
+// FlatMapstructure returns a new FlatNestedMockConfig.
+// FlatNestedMockConfig is an auto-generated flat version of NestedMockConfig.
+// Where the contents a fields with a `mapstructure:,squash` tag are bubbled up.
+func (*NestedMockConfig) FlatMapstructure() interface{ HCL2Spec() map[string]hcldec.Spec } {
+	return new(FlatNestedMockConfig)
+}
+
+// HCL2Spec returns the hcl spec of a NestedMockConfig.
+// This spec is used by HCL to read the fields of NestedMockConfig.
+// The decoded values from this spec will then be applied to a FlatNestedMockConfig.
+func (*FlatNestedMockConfig) HCL2Spec() map[string]hcldec.Spec {
+	s := map[string]hcldec.Spec{
+		"string":                  &hcldec.AttrSpec{Name: "string", Type: cty.String, Required: false},
+		"int":                     &hcldec.AttrSpec{Name: "int", Type: cty.Number, Required: false},
+		"int64":                   &hcldec.AttrSpec{Name: "int64", Type: cty.Number, Required: false},
+		"bool":                    &hcldec.AttrSpec{Name: "bool", Type: cty.Bool, Required: false},
+		"trilean":                 &hcldec.AttrSpec{Name: "trilean", Type: cty.Bool, Required: false},
+		"duration":                &hcldec.AttrSpec{Name: "duration", Type: cty.String, Required: false},
+		"map_string_string":       &hcldec.AttrSpec{Name: "map_string_string", Type: cty.Map(cty.String), Required: false},
+		"slice_string":            &hcldec.AttrSpec{Name: "slice_string", Type: cty.List(cty.String), Required: false},
+		"slice_slice_string":      &hcldec.AttrSpec{Name: "slice_slice_string", Type: cty.List(cty.List(cty.String)), Required: false},
+		"named_map_string_string": &hcldec.AttrSpec{Name: "named_map_string_string", Type: cty.Map(cty.String), Required: false},
+		"named_string":            &hcldec.AttrSpec{Name: "named_string", Type: cty.String, Required: false},
+		"tag":                     &hcldec.BlockListSpec{TypeName: "tag", Nested: hcldec.ObjectSpec((*FlatMockTag)(nil).HCL2Spec())},
+		"data_source":             &hcldec.AttrSpec{Name: "data_source", Type: cty.String, Required: false},
+	}
+	return s
+}

vendor/github.com/hashicorp/packer-plugin-sdk/hcl2helper/values.go

@@ -0,0 +1,131 @@
+package hcl2helper
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/hashicorp/hcl/v2/hcldec"
+	"github.com/hashicorp/packer-plugin-sdk/template/config"
+	"github.com/mitchellh/mapstructure"
+	"github.com/zclconf/go-cty/cty"
+	"github.com/zclconf/go-cty/cty/gocty"
+)
+
+// UnknownVariableValue is a sentinel value that can be used
+// to denote that the value of a variable is unknown at this time.
+// RawConfig uses this information to build up data about
+// unknown keys.
+const UnknownVariableValue = "74D93920-ED26-11E3-AC10-0800200C9A66"
+
+// HCL2ValueFromConfigValue takes a value turns it into
+// a cty.Value so it can be used within, for example, an HCL2 EvalContext.
+func HCL2ValueFromConfigValue(v interface{}) cty.Value {
+	if v == nil {
+		return cty.NullVal(cty.DynamicPseudoType)
+	}
+	if v == UnknownVariableValue {
+		return cty.DynamicVal
+	}
+
+	switch tv := v.(type) {
+	case bool:
+		return cty.BoolVal(tv)
+	case string:
+		return cty.StringVal(tv)
+	case int:
+		return cty.NumberIntVal(int64(tv))
+	case float64:
+		return cty.NumberFloatVal(tv)
+	case []interface{}:
+		vals := make([]cty.Value, len(tv))
+		for i, ev := range tv {
+			vals[i] = HCL2ValueFromConfigValue(ev)
+		}
+		return cty.TupleVal(vals)
+	case []string:
+		vals := make([]cty.Value, len(tv))
+		for i, ev := range tv {
+			vals[i] = cty.StringVal(ev)
+		}
+		return cty.ListVal(vals)
+	case map[string]interface{}:
+		vals := map[string]cty.Value{}
+		for k, ev := range tv {
+			vals[k] = HCL2ValueFromConfigValue(ev)
+		}
+		return cty.ObjectVal(vals)
+	default:
+		// HCL/HIL should never generate anything that isn't caught by
+		// the above, so if we get here something has gone very wrong.
+		panic(fmt.Errorf("can't convert %#v to cty.Value", v))
+	}
+}
+
+// HCL2ValueFromConfig takes a struct with it's map of hcldec.Spec, and turns it into
+// a cty.Value so it can be used as, for example, a Datasource value.
+func HCL2ValueFromConfig(conf interface{}, configSpec map[string]hcldec.Spec) cty.Value {
+	c := map[string]interface{}{}
+	if err := mapstructure.Decode(conf, &c); err != nil {
+		panic(fmt.Errorf("can't convert %#v to cty.Value", conf))
+	}
+
+	// Use the HCL2Spec to know the expected cty.Type for an attribute
+	resp := map[string]cty.Value{}
+	for k, v := range c {
+		spec := configSpec[k]
+
+		switch st := spec.(type) {
+		case *hcldec.BlockListSpec:
+			// This should be a slice of objects, so we need to take a special care
+			if hcldec.ImpliedType(st.Nested).IsObjectType() {
+				res := []cty.Value{}
+				c := []interface{}{}
+				if err := mapstructure.Decode(v, &c); err != nil {
+					panic(fmt.Errorf("can't convert %#v to cty.Value", conf))
+				}
+				types := hcldec.ChildBlockTypes(spec)
+				for _, e := range c {
+					res = append(res, HCL2ValueFromConfig(e, types[k].(hcldec.ObjectSpec)))
+				}
+				if len(res) != 0 {
+					resp[k] = cty.ListVal(res)
+					continue
+				}
+				// At this point this is an empty list so we want it to go to gocty.ToCtyValue(v, impT)
+				// and make it a NullVal
+			}
+		}
+
+		impT := hcldec.ImpliedType(spec)
+		if value, err := gocty.ToCtyValue(v, impT); err == nil {
+			resp[k] = value
+			continue
+		}
+
+		// Uncommon types not caught until now
+		switch tv := v.(type) {
+		case config.Trilean:
+			resp[k] = cty.BoolVal(tv.True())
+			continue
+		case time.Duration:
+			if tv.Microseconds() == int64(0) {
+				resp[k] = cty.NumberIntVal(int64(0))
+				continue
+			}
+			resp[k] = cty.NumberIntVal(v.(time.Duration).Milliseconds())
+			continue
+		}
+
+		// This is a nested object and we should recursively go through the same process
+		if impT.IsObjectType() {
+			types := hcldec.ChildBlockTypes(spec)
+			resp[k] = HCL2ValueFromConfig(v, types[k].(hcldec.ObjectSpec))
+			continue
+		}
+
+		panic("not supported type - contact the Packer team with further information")
+	}
+
+	// This is decoding structs so it will always be an cty.ObjectVal at the end
+	return cty.ObjectVal(resp)
+}

vendor/github.com/hashicorp/packer-plugin-sdk/version/version.go

@@ -13,12 +13,12 @@ import (
 var GitCommit string
 
 // Package version helps plugin creators set and track the sdk version using
-const Version = "0.0.6"
+const Version = "0.0.7"
 
 // A pre-release marker for the version. If this is "" (empty string)
 // then it means that it is a final release. Otherwise, this is a pre-release
 // such as "dev" (in development), "beta", "rc1", etc.
-const VersionPrerelease = "dev"
+const VersionPrerelease = ""
 
 // InitializePluginVersion initializes the SemVer and returns a version var.
 // If the provided "version" string is not valid, the call to version.Must

vendor/modules.txt

@@ -355,7 +355,7 @@ github.com/hashicorp/hcl/v2/hclparse
 github.com/hashicorp/hcl/v2/hclsyntax
 github.com/hashicorp/hcl/v2/hclwrite
 github.com/hashicorp/hcl/v2/json
-# github.com/hashicorp/packer-plugin-sdk v0.0.7-0.20210111224258-fd30ebb797f0
+# github.com/hashicorp/packer-plugin-sdk v0.0.7
 github.com/hashicorp/packer-plugin-sdk/acctest
 github.com/hashicorp/packer-plugin-sdk/acctest/provisioneracc
 github.com/hashicorp/packer-plugin-sdk/acctest/testutils
@@ -368,6 +368,7 @@ github.com/hashicorp/packer-plugin-sdk/communicator/ssh
 github.com/hashicorp/packer-plugin-sdk/communicator/sshkey
 github.com/hashicorp/packer-plugin-sdk/filelock
 github.com/hashicorp/packer-plugin-sdk/guestexec
+github.com/hashicorp/packer-plugin-sdk/hcl2helper
 github.com/hashicorp/packer-plugin-sdk/json
 github.com/hashicorp/packer-plugin-sdk/multistep
 github.com/hashicorp/packer-plugin-sdk/multistep/commonsteps