Enable only/except for provisioners and post-processors (#9357)

hcl2template/common_test.go

@@ -30,6 +30,7 @@ func getBasicParser() *Parser {
 		},
 		PostProcessorsSchemas: packer.MapOfPostProcessor{
 			"amazon-import": func() (packer.PostProcessor, error) { return &MockPostProcessor{}, nil },
+			"manifest":      func() (packer.PostProcessor, error) { return &MockPostProcessor{}, nil },
 		},
 	}
 }

hcl2template/testdata/build/post-processor_onlyexcept.pkr.hcl

@@ -0,0 +1,21 @@
+
+// starts resources to provision them.
+build {
+    sources = [
+        "source.virtualbox-iso.ubuntu-1204",
+        "source.amazon-ebs.ubuntu-1604",
+    ]
+
+    post-processor "amazon-import" {
+        only = ["virtualbox-iso.ubuntu-1204"]
+    }
+    post-processor "manifest" {
+        except = ["virtualbox-iso.ubuntu-1204"]
+    }
+}
+
+source "virtualbox-iso" "ubuntu-1204" {
+}
+
+source "amazon-ebs" "ubuntu-1604" {
+}

hcl2template/testdata/build/provisioner_onlyexcept.pkr.hcl

@@ -0,0 +1,21 @@
+
+// starts resources to provision them.
+build {
+    sources = [
+        "source.virtualbox-iso.ubuntu-1204",
+        "source.amazon-ebs.ubuntu-1604",
+    ]
+
+    provisioner "shell" {
+        only = ["virtualbox-iso.ubuntu-1204"]
+    }
+    provisioner "file" {
+        except = ["virtualbox-iso.ubuntu-1204"]
+    }
+}
+
+source "virtualbox-iso" "ubuntu-1204" {
+}
+
+source "amazon-ebs" "ubuntu-1604" {
+}

hcl2template/types.build.post-processor.go

@@ -12,6 +12,7 @@ import (
 type PostProcessorBlock struct {
 	PType      string
 	PName      string
+	OnlyExcept OnlyExcept
 
 	HCL2Ref
 }
@@ -23,6 +24,8 @@ func (p *PostProcessorBlock) String() string {
 func (p *Parser) decodePostProcessor(block *hcl.Block) (*PostProcessorBlock, hcl.Diagnostics) {
 	var b struct {
 		Name   string   `hcl:"name,optional"`
+		Only   []string `hcl:"only,optional"`
+		Except []string `hcl:"except,optional"`
 		Rest   hcl.Body `hcl:",remain"`
 	}
 	diags := gohcl.DecodeBody(block.Body, nil, &b)
@@ -33,9 +36,15 @@ func (p *Parser) decodePostProcessor(block *hcl.Block) (*PostProcessorBlock, hcl
 	postProcessor := &PostProcessorBlock{
 		PType:      block.Labels[0],
 		PName:      b.Name,
+		OnlyExcept: OnlyExcept{Only: b.Only, Except: b.Except},
 		HCL2Ref:    newHCL2Ref(block, b.Rest),
 	}
 
+	diags = diags.Extend(postProcessor.OnlyExcept.Validate())
+	if diags.HasErrors() {
+		return nil, diags
+	}
+
 	if !p.PostProcessorsSchemas.Has(postProcessor.PType) {
 		diags = append(diags, &hcl.Diagnostic{
 			Summary:  fmt.Sprintf("Unknown "+buildPostProcessorLabel+" type %q", postProcessor.PType),

hcl2template/types.build.provisioners.go

@@ -9,6 +9,52 @@ import (
 	"github.com/hashicorp/packer/packer"
 )
 
+// OnlyExcept is a struct that is meant to be embedded that contains the
+// logic required for "only" and "except" meta-parameters.
+type OnlyExcept struct {
+	Only   []string `json:"only,omitempty"`
+	Except []string `json:"except,omitempty"`
+}
+
+// Skip says whether or not to skip the build with the given name.
+func (o *OnlyExcept) Skip(n string) bool {
+	if len(o.Only) > 0 {
+		for _, v := range o.Only {
+			if v == n {
+				return false
+			}
+		}
+
+		return true
+	}
+
+	if len(o.Except) > 0 {
+		for _, v := range o.Except {
+			if v == n {
+				return true
+			}
+		}
+
+		return false
+	}
+
+	return false
+}
+
+// Validate validates that the OnlyExcept settings are correct for a thing.
+func (o *OnlyExcept) Validate() hcl.Diagnostics {
+	var diags hcl.Diagnostics
+
+	if len(o.Only) > 0 && len(o.Except) > 0 {
+		diags = diags.Append(&hcl.Diagnostic{
+			Summary:  "only one of 'only' or 'except' may be specified",
+			Severity: hcl.DiagError,
+		})
+	}
+
+	return diags
+}
+
 // ProvisionerBlock references a detected but unparsed provisioner
 type ProvisionerBlock struct {
 	PType       string
@@ -16,6 +62,7 @@ type ProvisionerBlock struct {
 	PauseBefore time.Duration
 	MaxRetries  int
 	Timeout     time.Duration
+	OnlyExcept  OnlyExcept
 	HCL2Ref
 }
 
@@ -29,6 +76,8 @@ func (p *Parser) decodeProvisioner(block *hcl.Block) (*ProvisionerBlock, hcl.Dia
 		PauseBefore string   `hcl:"pause_before,optional"`
 		MaxRetries  int      `hcl:"max_retries,optional"`
 		Timeout     string   `hcl:"timeout,optional"`
+		Only        []string `hcl:"only,optional"`
+		Except      []string `hcl:"except,optional"`
 		Rest        hcl.Body `hcl:",remain"`
 	}
 	diags := gohcl.DecodeBody(block.Body, nil, &b)
@@ -40,9 +89,15 @@ func (p *Parser) decodeProvisioner(block *hcl.Block) (*ProvisionerBlock, hcl.Dia
 		PType:      block.Labels[0],
 		PName:      b.Name,
 		MaxRetries: b.MaxRetries,
+		OnlyExcept: OnlyExcept{Only: b.Only, Except: b.Except},
 		HCL2Ref:    newHCL2Ref(block, b.Rest),
 	}
 
+	diags = diags.Extend(provisioner.OnlyExcept.Validate())
+	if diags.HasErrors() {
+		return nil, diags
+	}
+
 	if b.PauseBefore != "" {
 		pauseBefore, err := time.ParseDuration(b.PauseBefore)
 		if err != nil {

hcl2template/types.build_test.go

@@ -4,6 +4,7 @@ import (
 	"path/filepath"
 	"testing"
 
+	. "github.com/hashicorp/packer/hcl2template/internal"
 	"github.com/hashicorp/packer/packer"
 )
 
@@ -122,6 +123,139 @@ func TestParse_build(t *testing.T) {
 			[]packer.Build{},
 			true,
 		},
+		{"post-processor with only and except",
+			defaultParser,
+			parseTestArgs{"testdata/build/post-processor_onlyexcept.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "build"),
+				Sources: map[SourceRef]SourceBlock{
+					refVBIsoUbuntu1204:  {Type: "virtualbox-iso", Name: "ubuntu-1204"},
+					refAWSEBSUbuntu1604: {Type: "amazon-ebs", Name: "ubuntu-1604"},
+				},
+				Builds: Builds{
+					&BuildBlock{
+						Sources:           []SourceRef{refVBIsoUbuntu1204, refAWSEBSUbuntu1604},
+						ProvisionerBlocks: nil,
+						PostProcessors: []*PostProcessorBlock{
+							{
+								PType:      "amazon-import",
+								OnlyExcept: OnlyExcept{Only: []string{"virtualbox-iso.ubuntu-1204"}, Except: nil},
+							},
+							{
+								PType:      "manifest",
+								OnlyExcept: OnlyExcept{Only: nil, Except: []string{"virtualbox-iso.ubuntu-1204"}},
+							},
+						},
+					},
+				},
+			},
+			false, false,
+			[]packer.Build{
+				&packer.CoreBuild{
+					Type:         "virtualbox-iso.ubuntu-1204",
+					Prepared:     true,
+					Builder:      emptyMockBuilder,
+					Provisioners: []packer.CoreBuildProvisioner{},
+					PostProcessors: [][]packer.CoreBuildPostProcessor{
+						{
+							{
+								PType: "amazon-import",
+								PostProcessor: &MockPostProcessor{
+									Config: MockConfig{
+										NestedMockConfig: NestedMockConfig{Tags: []MockTag{}},
+										NestedSlice:      []NestedMockConfig{},
+									},
+								},
+							},
+						},
+					},
+				},
+				&packer.CoreBuild{
+					Type:         "amazon-ebs.ubuntu-1604",
+					Prepared:     true,
+					Builder:      emptyMockBuilder,
+					Provisioners: []packer.CoreBuildProvisioner{},
+					PostProcessors: [][]packer.CoreBuildPostProcessor{
+						{
+							{
+								PType: "manifest",
+								PostProcessor: &MockPostProcessor{
+									Config: MockConfig{
+										NestedMockConfig: NestedMockConfig{Tags: []MockTag{}},
+										NestedSlice:      []NestedMockConfig{},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+			false,
+		},
+		{"provisioner with only and except",
+			defaultParser,
+			parseTestArgs{"testdata/build/provisioner_onlyexcept.pkr.hcl", nil, nil},
+			&PackerConfig{
+				Basedir: filepath.Join("testdata", "build"),
+				Sources: map[SourceRef]SourceBlock{
+					refVBIsoUbuntu1204:  {Type: "virtualbox-iso", Name: "ubuntu-1204"},
+					refAWSEBSUbuntu1604: {Type: "amazon-ebs", Name: "ubuntu-1604"},
+				},
+				Builds: Builds{
+					&BuildBlock{
+						Sources: []SourceRef{refVBIsoUbuntu1204, refAWSEBSUbuntu1604},
+						ProvisionerBlocks: []*ProvisionerBlock{
+							{
+								PType:      "shell",
+								OnlyExcept: OnlyExcept{Only: []string{"virtualbox-iso.ubuntu-1204"}, Except: nil},
+							},
+							{
+								PType:      "file",
+								OnlyExcept: OnlyExcept{Only: nil, Except: []string{"virtualbox-iso.ubuntu-1204"}},
+							},
+						},
+					},
+				},
+			},
+			false, false,
+			[]packer.Build{
+				&packer.CoreBuild{
+					Type:     "virtualbox-iso.ubuntu-1204",
+					Prepared: true,
+					Builder:  emptyMockBuilder,
+					Provisioners: []packer.CoreBuildProvisioner{
+						{
+							PType: "shell",
+							Provisioner: &MockProvisioner{
+								Config: MockConfig{
+									NestedMockConfig: NestedMockConfig{Tags: []MockTag{}},
+									NestedSlice:      []NestedMockConfig{},
+								},
+							},
+						},
+					},
+					PostProcessors: [][]packer.CoreBuildPostProcessor{},
+				},
+				&packer.CoreBuild{
+					Type:     "amazon-ebs.ubuntu-1604",
+					Prepared: true,
+					Builder:  emptyMockBuilder,
+					Provisioners: []packer.CoreBuildProvisioner{
+						{
+							PType: "file",
+							Provisioner: &MockProvisioner{
+								Config: MockConfig{
+									NestedMockConfig: NestedMockConfig{Tags: []MockTag{}},
+									NestedSlice:      []NestedMockConfig{},
+								},
+							},
+						},
+					},
+					PostProcessors: [][]packer.CoreBuildPostProcessor{},
+				},
+			},
+			false,
+		},
 	}
 	testParse(t, tests)
 }

hcl2template/types.packer_config.go

@@ -198,6 +198,9 @@ func (cfg *PackerConfig) getCoreBuildProvisioners(source SourceBlock, blocks []*
 	var diags hcl.Diagnostics
 	res := []packer.CoreBuildProvisioner{}
 	for _, pb := range blocks {
+		if pb.OnlyExcept.Skip(source.Type + "." + source.Name) {
+			continue
+		}
 		provisioner, moreDiags := cfg.startProvisioner(source, pb, ectx, generatedVars)
 		diags = append(diags, moreDiags...)
 		if moreDiags.HasErrors() {
@@ -238,6 +241,9 @@ func (cfg *PackerConfig) getCoreBuildPostProcessors(source SourceBlock, blocks [
 	var diags hcl.Diagnostics
 	res := []packer.CoreBuildPostProcessor{}
 	for _, ppb := range blocks {
+		if ppb.OnlyExcept.Skip(source.Type + "." + source.Name) {
+			continue
+		}
 		postProcessor, moreDiags := cfg.startPostProcessor(source, ppb, ectx, generatedVars)
 		diags = append(diags, moreDiags...)
 		if moreDiags.HasErrors() {

hcl2template/types.packer_config_test.go

@@ -10,7 +10,7 @@ import (
 
 var (
 	refVBIsoUbuntu1204  = SourceRef{Type: "virtualbox-iso", Name: "ubuntu-1204"}
-	refAWSEBSUbuntu1204 = SourceRef{Type: "amazon-ebs", Name: "ubuntu-1604"}
+	refAWSEBSUbuntu1604 = SourceRef{Type: "amazon-ebs", Name: "ubuntu-1604"}
 )
 
 func TestParser_complete(t *testing.T) {
@@ -73,13 +73,13 @@ func TestParser_complete(t *testing.T) {
 				},
 				Sources: map[SourceRef]SourceBlock{
 					refVBIsoUbuntu1204:  {Type: "virtualbox-iso", Name: "ubuntu-1204"},
-					refAWSEBSUbuntu1204: {Type: "amazon-ebs", Name: "ubuntu-1604"},
+					refAWSEBSUbuntu1604: {Type: "amazon-ebs", Name: "ubuntu-1604"},
 				},
 				Builds: Builds{
 					&BuildBlock{
 						Sources: []SourceRef{
 							refVBIsoUbuntu1204,
-							refAWSEBSUbuntu1204,
+							refAWSEBSUbuntu1604,
 						},
 						ProvisionerBlocks: []*ProvisionerBlock{
 							{