Remove App-only fields from CNAB image inspect out

Removes the App-only SERVICE fields from the `app image inspect
--pretty` output when inspecting a non-App CNAB:
* REPLICAS
* PORTS

Added unit test for image inspect of CNABs with pretty format.

Refactored parameter key sorting code to use simpler `sort.Strings()`

Signed-off-by: Nick Adcock <nick.adcock@docker.com>

Author: zappy-shu

internal/inspect/inspect.go

@@ -111,7 +111,7 @@ func ImageInspect(out io.Writer, app *types.App, argParameters map[string]string
 	}
 
 	outputFormat := os.Getenv(internal.DockerInspectFormatEnvVar)
-	return printImageAppInfo(out, appInfo, outputFormat)
+	return printImageAppInfo(out, appInfo, outputFormat, true)
 }
 
 func ImageInspectCNAB(out io.Writer, bndl *bundle.Bundle, outputFormat string) error {
@@ -138,6 +138,7 @@ func ImageInspectCNAB(out io.Writer, bndl *bundle.Bundle, outputFormat string) e
 			params[v.Definition] = ""
 		}
 	}
+	sort.Strings(paramKeys)
 
 	services := []Service{}
 	for k, v := range bndl.Images {
@@ -146,6 +147,9 @@ func ImageInspectCNAB(out io.Writer, bndl *bundle.Bundle, outputFormat string) e
 			Image: v.Image,
 		})
 	}
+	sort.SliceStable(services, func(i, j int) bool {
+		return services[i].Name < services[j].Name
+	})
 
 	appInfo := ImageAppInfo{
 		Metadata:       meta,
@@ -154,7 +158,7 @@ func ImageInspectCNAB(out io.Writer, bndl *bundle.Bundle, outputFormat string) e
 		Services:       services,
 	}
 
-	return printImageAppInfo(out, appInfo, outputFormat)
+	return printImageAppInfo(out, appInfo, outputFormat, false)
 }
 
 func printAppInfo(out io.Writer, app AppInfo, format string) error {
@@ -168,10 +172,10 @@ func printAppInfo(out io.Writer, app AppInfo, format string) error {
 	}
 }
 
-func printImageAppInfo(out io.Writer, app ImageAppInfo, format string) error {
+func printImageAppInfo(out io.Writer, app ImageAppInfo, format string, isApp bool) error {
 	switch format {
 	case "pretty":
-		return printTable(out, app)
+		return printTable(out, app, isApp)
 	case "json":
 		return printJSON(out, app)
 	default:
@@ -209,16 +213,24 @@ func printAppTable(out io.Writer, info AppInfo) error {
 	return nil
 }
 
-func printTable(out io.Writer, appInfo ImageAppInfo) error {
+func printTable(out io.Writer, appInfo ImageAppInfo, isApp bool) error {
 	// Add Meta data
 	printYAML(out, appInfo.Metadata)
 
 	// Add Service section
-	printSection(out, len(appInfo.Services), func(w io.Writer) {
-		for _, service := range appInfo.Services {
-			fmt.Fprintf(w, "%s\t%d\t%s\t%s\n", service.Name, service.Replicas, service.Ports, service.Image)
-		}
-	}, "SERVICE", "REPLICAS", "PORTS", "IMAGE")
+	if isApp {
+		printSection(out, len(appInfo.Services), func(w io.Writer) {
+			for _, service := range appInfo.Services {
+				fmt.Fprintf(w, "%s\t%d\t%s\t%s\n", service.Name, service.Replicas, service.Ports, service.Image)
+			}
+		}, "SERVICE", "REPLICAS", "PORTS", "IMAGE")
+	} else {
+		printSection(out, len(appInfo.Services), func(w io.Writer) {
+			for _, service := range appInfo.Services {
+				fmt.Fprintf(w, "%s\t%s\n", service.Name, service.Image)
+			}
+		}, "SERVICE", "IMAGE")
+	}
 
 	// Add Network section
 	printSection(out, len(appInfo.Networks), func(w io.Writer) {
@@ -369,7 +381,7 @@ func extractParameters(app *types.App, argParameters map[string]string) ([]strin
 	for k := range allParameters {
 		parametersKeys = append(parametersKeys, k)
 	}
-	sort.Slice(parametersKeys, func(i, j int) bool { return parametersKeys[i] < parametersKeys[j] })
+	sort.Strings(parametersKeys)
 	return parametersKeys, allParameters, nil
 }
 

internal/inspect/inspect_test.go

@@ -133,16 +133,24 @@ text: hello`),
 	})
 }
 
-func TestImageInspectCNAB(t *testing.T) {
+func TestImageInspectCNABFormatJSON(t *testing.T) {
+	testImageInspectCNAB(t, "json")
+}
+
+func TestImageInspectCNABFormatPretty(t *testing.T) {
+	testImageInspectCNAB(t, "pretty")
+}
+
+func testImageInspectCNAB(t *testing.T, format string) {
 	s := golden.Get(t, "bundle-json.golden")
 	var bndl bundle.Bundle
 	err := json.Unmarshal(s, &bndl)
 	assert.NilError(t, err)
 
-	expected := golden.Get(t, "inspect-bundle-json.golden")
+	expected := golden.Get(t, fmt.Sprintf("inspect-bundle-%s.golden", format))
 
 	outBuffer := new(bytes.Buffer)
-	err = ImageInspectCNAB(outBuffer, &bndl, "json")
+	err = ImageInspectCNAB(outBuffer, &bndl, format)
 	assert.NilError(t, err)
 
 	result := outBuffer.String()

internal/inspect/testdata/inspect-bundle-pretty.golden

@@ -0,0 +1,24 @@
+version: 0.1.0
+name: packing
+description: hello
+maintainers:
+- name: dev1
+  email: dev1@example.com
+- name: dev2
+  email: dev2@example.com
+
+
+SERVICE     IMAGE
+app-watcher watcher
+debug       busybox:latest
+front       nginx
+monitor     busybox:latest
+
+PARAMETER                           VALUE
+com.docker.app.args                 
+com.docker.app.inspect-format       json
+com.docker.app.kubernetes-namespace 
+com.docker.app.orchestrator         
+com.docker.app.render-format        yaml
+com.docker.app.share-registry-creds false
+watcher.cmd                         foo