show extensions when pack inspect

Signed-off-by: Darshan Kumar <itsdarshankumar@gmail.com>

internal/inspectimage/info_display.go

@@ -44,6 +44,7 @@ type InfoDisplay struct {
 	Base            BaseDisplay             `json:"base_image" yaml:"base_image" toml:"base_image"`
 	RunImageMirrors []RunImageMirrorDisplay `json:"run_images" yaml:"run_images" toml:"run_images"`
 	Buildpacks      []dist.ModuleInfo       `json:"buildpacks" yaml:"buildpacks" toml:"buildpacks"`
+	Extensions      []dist.ModuleInfo       `json:"extensions" yaml:"extensions" toml:"extensions"`
 	Processes       []ProcessDisplay        `json:"processes" yaml:"processes" toml:"processes"`
 }
 
@@ -62,6 +63,7 @@ func NewInfoDisplay(info *client.ImageInfo, generalInfo GeneralInfo) *InfoDispla
 		Base:            displayBase(info.Base),
 		RunImageMirrors: displayMirrors(info, generalInfo),
 		Buildpacks:      displayBuildpacks(info.Buildpacks),
+		Extensions:      displayExtensions(info.Extensions),
 		Processes:       displayProcesses(info.Processes),
 	}
 }
@@ -140,6 +142,18 @@ func displayBuildpacks(buildpacks []buildpack.GroupElement) []dist.ModuleInfo {
 	return result
 }
 
+func displayExtensions(extensions []buildpack.GroupElement) []dist.ModuleInfo {
+	var result []dist.ModuleInfo
+	for _, extension := range extensions {
+		result = append(result, dist.ModuleInfo{
+			ID:       extension.ID,
+			Version:  extension.Version,
+			Homepage: extension.Homepage,
+		})
+	}
+	return result
+}
+
 func displayProcesses(details client.ProcessDetails) []ProcessDisplay {
 	var result []ProcessDisplay
 	detailsArray := details.OtherProcesses

internal/inspectimage/writer/human_readable.go

@@ -61,6 +61,7 @@ func writeImageInfo(
 		Parse(runImagesTemplate))
 	imgTpl = template.Must(imgTpl.New("buildpacks").
 		Parse(buildpacksTemplate))
+	imgTpl = template.Must(imgTpl.New("extensions").Parse(extensionsTemplate))
 	imgTpl = template.Must(imgTpl.New("processes").
 		Parse(processesTemplate))
 	imgTpl = template.Must(imgTpl.New("image").
@@ -127,6 +128,17 @@ Buildpacks:
   (buildpack metadata not present)
 {{- end }}`
 
+var extensionsTemplate = `
+Extensions:
+{{- if .Info.Extensions }}
+  ID	VERSION	HOMEPAGE
+{{- range $_, $b := .Info.Extensions }}
+  {{ $b.ID }}	{{ $b.Version }}	{{ StringsValueOrDefault $b.Homepage "-" }}
+{{- end }}
+{{- else }}
+  (extension metadata not present)
+{{- end }}`
+
 var processesTemplate = `
 {{- if .Info.Processes }}
 
@@ -150,4 +162,6 @@ Base Image:
 {{- end}}
   Top Layer: {{ .Info.Base.TopLayer }}
 {{ template "runImages" . }}
-{{ template "buildpacks" . }}{{ template "processes" . }}`
+{{ template "buildpacks" . }}
+{{ template "extensions" . }}
+{{ template "processes" . }}`

pkg/client/inspect_image.go

@@ -24,6 +24,10 @@ type ImageInfo struct {
 	// phases and made a contribution to this image.
 	Buildpacks []buildpack.GroupElement
 
+	// List of extensions that passed detection, ran their generate
+	// phases and made a contribution to this image.
+	Extensions []buildpack.GroupElement
+
 	// Base includes two references to the run image,
 	// - the Run Image ID,
 	// - the hash of the last layer in the app image that belongs to the run image.
@@ -178,6 +182,7 @@ func (c *Client) InspectImage(name string, daemon bool) (*ImageInfo, error) {
 		Base:       layersMd.RunImage,
 		BOM:        buildMD.BOM,
 		Buildpacks: buildMD.Buildpacks,
+		Extensions: buildMD.Extensions,
 		Processes:  processDetails,
 	}, nil
 }