Merge pull request #9468 from hashicorp/azr-ft-hcl2-inspect

[hcl2] inspect command

command/cli.go

@@ -121,3 +121,12 @@ type ValidateArgs struct {
 	MetaArgs
 	SyntaxOnly bool
 }
+
+func (va *InspectArgs) AddFlagSets(flags *flag.FlagSet) {
+	va.MetaArgs.AddFlagSets(flags)
+}
+
+// InspectArgs represents a parsed cli line for a `packer inspect`
+type InspectArgs struct {
+	MetaArgs
+}

command/console_test.go

@@ -11,7 +11,7 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func Test_piping(t *testing.T) {
+func Test_console(t *testing.T) {
 
 	tc := []struct {
 		piped    string

command/exec_test.go

@@ -85,6 +85,8 @@ func TestHelperProcess(*testing.T) {
 	switch cmd {
 	case "console":
 		os.Exit((&ConsoleCommand{Meta: commandMeta()}).Run(args))
+	case "inspect":
+		os.Exit((&InspectCommand{Meta: commandMeta()}).Run(args))
 	default:
 		fmt.Fprintf(os.Stderr, "Unknown command %q\n", cmd)
 		os.Exit(2)

command/inspect.go

@@ -1,12 +1,10 @@
 package command
 
 import (
-	"fmt"
+	"context"
-	"sort"
 	"strings"
 
-	"github.com/hashicorp/packer/template"
+	"github.com/hashicorp/packer/packer"
-
 	"github.com/posener/complete"
 )
 
@@ -15,142 +13,40 @@ type InspectCommand struct {
 }
 
 func (c *InspectCommand) Run(args []string) int {
-	flags := c.Meta.FlagSet("inspect", FlagSetNone)
+	ctx := context.Background()
+
+	cfg, ret := c.ParseArgs(args)
+	if ret != 0 {
+		return ret
+	}
+
+	return c.RunContext(ctx, cfg)
+}
+
+func (c *InspectCommand) ParseArgs(args []string) (*InspectArgs, int) {
+	var cfg InspectArgs
+	flags := c.Meta.FlagSet("inspect", FlagSetVars)
 	flags.Usage = func() { c.Ui.Say(c.Help()) }
+	cfg.AddFlagSets(flags)
 	if err := flags.Parse(args); err != nil {
-		return 1
+		return &cfg, 1
 	}
 
 	args = flags.Args()
-	if len(args) != 1 {
+	if len(args) == 1 {
-		flags.Usage()
+		cfg.Path = args[0]
-		return 1
+	}
+	return &cfg, 0
 }
 
-	// Parse the template
+func (c *InspectCommand) RunContext(ctx context.Context, cla *InspectArgs) int {
-	tpl, err := template.ParseFile(args[0])
+	packerStarter, ret := c.GetConfig(&cla.MetaArgs)
-	if err != nil {
+	if ret != 0 {
-		c.Ui.Error(fmt.Sprintf("Failed to parse template: %s", err))
+		return ret
-		return 1
 	}
-
+	return packerStarter.InspectConfig(packer.InspectConfigOptions{
-	// Convenience...
+		Ui: c.Ui,
-	ui := c.Ui
+	})
-
-	// Description
-	if tpl.Description != "" {
-		ui.Say("Description:\n")
-		ui.Say(tpl.Description + "\n")
-	}
-
-	// Variables
-	if len(tpl.Variables) == 0 {
-		ui.Say("Variables:\n")
-		ui.Say("  <No variables>")
-	} else {
-		requiredHeader := false
-		for k, v := range tpl.Variables {
-			for _, sensitive := range tpl.SensitiveVariables {
-				if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
-					v.Default = "<sensitive>"
-				}
-			}
-			if v.Required {
-				if !requiredHeader {
-					requiredHeader = true
-					ui.Say("Required variables:\n")
-				}
-
-				ui.Machine("template-variable", k, v.Default, "1")
-				ui.Say("  " + k)
-			}
-		}
-
-		if requiredHeader {
-			ui.Say("")
-		}
-
-		ui.Say("Optional variables and their defaults:\n")
-		keys := make([]string, 0, len(tpl.Variables))
-		max := 0
-		for k := range tpl.Variables {
-			keys = append(keys, k)
-			if len(k) > max {
-				max = len(k)
-			}
-		}
-
-		sort.Strings(keys)
-
-		for _, k := range keys {
-			v := tpl.Variables[k]
-			if v.Required {
-				continue
-			}
-			for _, sensitive := range tpl.SensitiveVariables {
-				if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
-					v.Default = "<sensitive>"
-				}
-			}
-
-			padding := strings.Repeat(" ", max-len(k))
-			output := fmt.Sprintf("  %s%s = %s", k, padding, v.Default)
-
-			ui.Machine("template-variable", k, v.Default, "0")
-			ui.Say(output)
-		}
-	}
-
-	ui.Say("")
-
-	// Builders
-	ui.Say("Builders:\n")
-	if len(tpl.Builders) == 0 {
-		ui.Say("  <No builders>")
-	} else {
-		keys := make([]string, 0, len(tpl.Builders))
-		max := 0
-		for k := range tpl.Builders {
-			keys = append(keys, k)
-			if len(k) > max {
-				max = len(k)
-			}
-		}
-
-		sort.Strings(keys)
-
-		for _, k := range keys {
-			v := tpl.Builders[k]
-			padding := strings.Repeat(" ", max-len(k))
-			output := fmt.Sprintf("  %s%s", k, padding)
-			if v.Name != v.Type {
-				output = fmt.Sprintf("%s (%s)", output, v.Type)
-			}
-
-			ui.Machine("template-builder", k, v.Type)
-			ui.Say(output)
-
-		}
-	}
-
-	ui.Say("")
-
-	// Provisioners
-	ui.Say("Provisioners:\n")
-	if len(tpl.Provisioners) == 0 {
-		ui.Say("  <No provisioners>")
-	} else {
-		for _, v := range tpl.Provisioners {
-			ui.Machine("template-provisioner", v.Type)
-			ui.Say(fmt.Sprintf("  %s", v.Type))
-		}
-	}
-
-	ui.Say("\nNote: If your build names contain user variables or template\n" +
-		"functions such as 'timestamp', these are processed at build time,\n" +
-		"and therefore only show in their raw form here.")
-
-	return 0
 }
 
 func (*InspectCommand) Help() string {

command/inspect_test.go

@@ -0,0 +1,106 @@
+package command
+
+import (
+	"fmt"
+	"path/filepath"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func Test_commands(t *testing.T) {
+
+	tc := []struct {
+		command  []string
+		env      []string
+		expected string
+	}{
+		{[]string{"inspect", "-var=fruit=banana", filepath.Join(testFixture("var-arg"), "fruit_builder.pkr.hcl")}, nil, `Packer Inspect: HCL2 mode
+
+> input-variables:
+
+var.fruit: "banana" [debug: {Type:cty.String,CmdValue:banana,VarfileValue:null,EnvValue:null,DefaultValue:null}]
+
+> local-variables:
+
+local.fruit: "banana"
+
+> builds:
+
+  > <unnamed build 0>:
+
+    sources:
+
+      null.builder
+
+    provisioners:
+
+      shell-local
+
+    post-processors:
+
+      <no post-processor>
+
+`},
+		{[]string{"inspect", "-var=fruit=peach", filepath.Join(testFixture("hcl"), "inspect", "fruit_string.pkr.hcl")}, nil, `Packer Inspect: HCL2 mode
+
+> input-variables:
+
+var.fruit: "peach" [debug: {Type:cty.String,CmdValue:peach,VarfileValue:null,EnvValue:null,DefaultValue:banana}]
+
+> local-variables:
+
+
+> builds:
+
+`},
+		{[]string{"inspect", "-var=fruit=peach", filepath.Join(testFixture("hcl"), "inspect")}, nil, `Packer Inspect: HCL2 mode
+
+> input-variables:
+
+var.fruit: "peach" [debug: {Type:cty.String,CmdValue:peach,VarfileValue:null,EnvValue:null,DefaultValue:banana}]
+
+> local-variables:
+
+
+> builds:
+
+  > aws_example_builder:
+
+  > Description: The builder of clouds !!
+
+Use it at will.
+
+
+    sources:
+
+      amazon-ebs.example-1
+
+      amazon-ebs.example-2
+
+    provisioners:
+
+      shell
+
+    post-processors:
+
+      manifest
+
+`},
+	}
+
+	for _, tc := range tc {
+		t.Run(fmt.Sprintf("packer %s", tc.command), func(t *testing.T) {
+			p := helperCommand(t, tc.command...)
+			p.Env = append(p.Env, tc.env...)
+			bs, err := p.Output()
+			if err != nil {
+				t.Fatalf("%v: %s", err, bs)
+			}
+			actual := string(bs)
+			if diff := cmp.Diff(tc.expected, actual); diff != "" {
+				t.Fatalf("unexpected ouput %s", diff)
+			}
+		})
+	}
+}

command/test-fixtures/hcl/inspect/aws-builds.pkr.hcl

@@ -0,0 +1,29 @@
+
+
+build {
+  name = "aws_example_builder"
+  description = <<EOF
+The builder of clouds !!
+
+Use it at will.
+EOF
+
+  sources = [
+      "source.amazon-ebs.example-1",
+
+      // this one is not defined but we don't want to error there, we just
+      // would like to show what sources are being referenced.
+      "source.amazon-ebs.example-2", 
+  ]
+
+  provisioner "shell" {
+    files = [
+      "bins/install-this.sh",
+      "bins/install-that.sh",
+      "bins/conf-this.sh",
+    ]
+  }
+
+  post-processor "manifest" {
+  }
+}

command/test-fixtures/hcl/inspect/fruit_string.pkr.hcl

@@ -0,0 +1,5 @@
+
+variable "fruit" {
+  type = string
+  default = "banana"
+}

hcl2template/types.build.go

@@ -38,6 +38,10 @@ type BuildBlock struct {
 	// Name is a string representing the named build to show in the logs
 	Name string
 
+	// A description of what this build does, it could be used in a inspect
+	// call for example.
+	Description string
+
 	// Sources is the list of sources that we want to start in this build block.
 	Sources []SourceRef
 
@@ -61,6 +65,7 @@ func (p *Parser) decodeBuildConfig(block *hcl.Block) (*BuildBlock, hcl.Diagnosti
 
 	var b struct {
 		Name        string   `hcl:"name,optional"`
+		Description string   `hcl:"description,optional"`
 		FromSources []string `hcl:"sources,optional"`
 		Config      hcl.Body `hcl:",remain"`
 	}
@@ -70,6 +75,7 @@ func (p *Parser) decodeBuildConfig(block *hcl.Block) (*BuildBlock, hcl.Diagnosti
 	}
 
 	build.Name = b.Name
+	build.Description = b.Description
 
 	for _, buildFrom := range b.FromSources {
 		ref := sourceRefFromString(buildFrom)

hcl2template/types.packer_config.go

@@ -439,6 +439,13 @@ func (p *PackerConfig) EvaluateExpression(line string) (out string, exit bool, d
 	case line == "help":
 		return PackerConsoleHelp, false, nil
 	case line == "variables":
+		return p.printVariables(), false, nil
+	default:
+		return p.handleEval(line)
+	}
+}
+
+func (p *PackerConfig) printVariables() string {
 	out := &strings.Builder{}
 	out.WriteString("> input-variables:\n\n")
 	for _, v := range p.InputVariables {
@@ -450,11 +457,52 @@ func (p *PackerConfig) EvaluateExpression(line string) (out string, exit bool, d
 		val, _ := v.Value()
 		fmt.Fprintf(out, "local.%s: %q\n", v.Name, PrintableCtyValue(val))
 	}
-
+	return out.String()
-		return out.String(), false, nil
-	default:
-		return p.handleEval(line)
 }
+
+func (p *PackerConfig) printBuilds() string {
+	out := &strings.Builder{}
+	out.WriteString("> builds:\n")
+	for i, build := range p.Builds {
+		name := build.Name
+		if name == "" {
+			name = fmt.Sprintf("<unnamed build %d>", i)
+		}
+		fmt.Fprintf(out, "\n  > %s:\n", name)
+		if build.Description != "" {
+			fmt.Fprintf(out, "\n  > Description: %s\n", build.Description)
+		}
+		fmt.Fprintf(out, "\n    sources:\n")
+		if len(build.Sources) == 0 {
+			fmt.Fprintf(out, "\n      <no source>\n")
+		}
+		for _, source := range build.Sources {
+			fmt.Fprintf(out, "\n      %s\n", source)
+		}
+		fmt.Fprintf(out, "\n    provisioners:\n\n")
+		if len(build.ProvisionerBlocks) == 0 {
+			fmt.Fprintf(out, "      <no provisioner>\n")
+		}
+		for _, prov := range build.ProvisionerBlocks {
+			str := prov.PType
+			if prov.PName != "" {
+				str = strings.Join([]string{prov.PType, prov.PName}, ".")
+			}
+			fmt.Fprintf(out, "      %s\n", str)
+		}
+		fmt.Fprintf(out, "\n    post-processors:\n\n")
+		if len(build.PostProcessors) == 0 {
+			fmt.Fprintf(out, "      <no post-processor>\n")
+		}
+		for _, pp := range build.PostProcessors {
+			str := pp.PType
+			if pp.PName != "" {
+				str = strings.Join([]string{pp.PType, pp.PName}, ".")
+			}
+			fmt.Fprintf(out, "      %s\n", str)
+		}
+	}
+	return out.String()
 }
 
 func (p *PackerConfig) handleEval(line string) (out string, exit bool, diags hcl.Diagnostics) {
@@ -479,3 +527,12 @@ func (p *PackerConfig) FixConfig(_ packer.FixConfigOptions) (diags hcl.Diagnosti
 	// No Fixers exist for HCL2 configs so there is nothing to do here for now.
 	return
 }
+
+func (p *PackerConfig) InspectConfig(opts packer.InspectConfigOptions) int {
+
+	ui := opts.Ui
+	ui.Say("Packer Inspect: HCL2 mode\n")
+	ui.Say(p.printVariables())
+	ui.Say(p.printBuilds())
+	return 0
+}

packer/core.go

@@ -424,6 +424,129 @@ func (c *Core) EvaluateExpression(line string) (string, bool, hcl.Diagnostics) {
 	}
 }
 
+func (c *Core) InspectConfig(opts InspectConfigOptions) int {
+
+	// Convenience...
+	ui := opts.Ui
+	tpl := c.Template
+	ui.Say("Packer Inspect: JSON mode")
+
+	// Description
+	if tpl.Description != "" {
+		ui.Say("Description:\n")
+		ui.Say(tpl.Description + "\n")
+	}
+
+	// Variables
+	if len(tpl.Variables) == 0 {
+		ui.Say("Variables:\n")
+		ui.Say("  <No variables>")
+	} else {
+		requiredHeader := false
+		for k, v := range tpl.Variables {
+			for _, sensitive := range tpl.SensitiveVariables {
+				if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
+					v.Default = "<sensitive>"
+				}
+			}
+			if v.Required {
+				if !requiredHeader {
+					requiredHeader = true
+					ui.Say("Required variables:\n")
+				}
+
+				ui.Machine("template-variable", k, v.Default, "1")
+				ui.Say("  " + k)
+			}
+		}
+
+		if requiredHeader {
+			ui.Say("")
+		}
+
+		ui.Say("Optional variables and their defaults:\n")
+		keys := make([]string, 0, len(tpl.Variables))
+		max := 0
+		for k := range tpl.Variables {
+			keys = append(keys, k)
+			if len(k) > max {
+				max = len(k)
+			}
+		}
+
+		sort.Strings(keys)
+
+		for _, k := range keys {
+			v := tpl.Variables[k]
+			if v.Required {
+				continue
+			}
+			for _, sensitive := range tpl.SensitiveVariables {
+				if ok := strings.Compare(sensitive.Default, v.Default); ok == 0 {
+					v.Default = "<sensitive>"
+				}
+			}
+
+			padding := strings.Repeat(" ", max-len(k))
+			output := fmt.Sprintf("  %s%s = %s", k, padding, v.Default)
+
+			ui.Machine("template-variable", k, v.Default, "0")
+			ui.Say(output)
+		}
+	}
+
+	ui.Say("")
+
+	// Builders
+	ui.Say("Builders:\n")
+	if len(tpl.Builders) == 0 {
+		ui.Say("  <No builders>")
+	} else {
+		keys := make([]string, 0, len(tpl.Builders))
+		max := 0
+		for k := range tpl.Builders {
+			keys = append(keys, k)
+			if len(k) > max {
+				max = len(k)
+			}
+		}
+
+		sort.Strings(keys)
+
+		for _, k := range keys {
+			v := tpl.Builders[k]
+			padding := strings.Repeat(" ", max-len(k))
+			output := fmt.Sprintf("  %s%s", k, padding)
+			if v.Name != v.Type {
+				output = fmt.Sprintf("%s (%s)", output, v.Type)
+			}
+
+			ui.Machine("template-builder", k, v.Type)
+			ui.Say(output)
+
+		}
+	}
+
+	ui.Say("")
+
+	// Provisioners
+	ui.Say("Provisioners:\n")
+	if len(tpl.Provisioners) == 0 {
+		ui.Say("  <No provisioners>")
+	} else {
+		for _, v := range tpl.Provisioners {
+			ui.Machine("template-provisioner", v.Type)
+			ui.Say(fmt.Sprintf("  %s", v.Type))
+		}
+	}
+
+	ui.Say("\nNote: If your build names contain user variables or template\n" +
+		"functions such as 'timestamp', these are processed at build time,\n" +
+		"and therefore only show in their raw form here.")
+
+	return 0
+}
+
 func (c *Core) FixConfig(opts FixConfigOptions) hcl.Diagnostics {
 	var diags hcl.Diagnostics
 

packer/run_interfaces.go

@@ -29,6 +29,7 @@ type Handler interface {
 	Evaluator
 	BuildGetter
 	ConfigFixer
+	ConfigInspector
 }
 
 //go:generate enumer -type FixConfigMode
@@ -52,3 +53,12 @@ type ConfigFixer interface {
 	// FixConfig will output the config in a fixed manner.
 	FixConfig(FixConfigOptions) hcl.Diagnostics
 }
+
+type InspectConfigOptions struct {
+	Ui
+}
+
+type ConfigInspector interface {
+	// Inspect will output self inspection for a configuration
+	InspectConfig(InspectConfigOptions) (ret int)
+}