Fix podman inspect to accept -l and -s fields

Podman inspect has a breaking change in that it dropped
--latest and --size options.

This PR adds these back.  Lots of tests rely on
podman inspect -l.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

cmd/podman/images/inspect.go

@@ -20,11 +20,13 @@ import (
 var (
 	// Command: podman image _inspect_
 	inspectCmd = &cobra.Command{
-		Use:     "inspect [flags] IMAGE",
-		Short:   "Display the configuration of an image",
-		Long:    `Displays the low-level information on an image identified by name or ID.`,
-		RunE:    inspect,
-		Example: `podman image inspect alpine`,
+		Use:   "inspect [flags] IMAGE",
+		Short: "Display the configuration of an image",
+		Long:  `Displays the low-level information on an image identified by name or ID.`,
+		RunE:  inspect,
+		Example: `podman inspect alpine
+  podman inspect --format "imageId: {{.Id}} size: {{.Size}}" alpine
+  podman inspect --format "image: {{.ImageName}} driver: {{.Driver}}" myctr`,
 	}
 	inspectOpts *entities.InspectOptions
 )
@@ -39,14 +41,14 @@ func init() {
 }
 
 func inspect(cmd *cobra.Command, args []string) error {
-	latestContainer := inspectOpts.Latest
-
-	if len(args) == 0 && !latestContainer {
-		return errors.Errorf("container or image name must be specified: podman inspect [options [...]] name")
+	if inspectOpts.Size {
+		return fmt.Errorf("--size can only be used for containers")
 	}
-
-	if len(args) > 0 && latestContainer {
-		return errors.Errorf("you cannot provide additional arguments with --latest")
+	if inspectOpts.Latest {
+		return fmt.Errorf("--latest can only be used for containers")
+	}
+	if len(args) == 0 {
+		return errors.Errorf("image name must be specified: podman image inspect [options [...]] name")
 	}
 
 	results, err := registry.ImageEngine().Inspect(context.Background(), args, *inspectOpts)

cmd/podman/inspect.go

@@ -1,10 +1,8 @@
 package main
 
 import (
-	"context"
 	"fmt"
 
-	"github.com/containers/image/v5/docker/reference"
 	"github.com/containers/libpod/cmd/podman/common"
 	"github.com/containers/libpod/cmd/podman/containers"
 	"github.com/containers/libpod/cmd/podman/images"
@@ -21,11 +19,12 @@ var (
 	// Command: podman _inspect_ Object_ID
 	inspectCmd = &cobra.Command{
 		Use:              "inspect [flags] {CONTAINER_ID | IMAGE_ID}",
-		Args:             cobra.ExactArgs(1),
 		Short:            "Display the configuration of object denoted by ID",
 		Long:             "Displays the low-level information on an object identified by name or ID",
 		TraverseChildren: true,
 		RunE:             inspect,
+		Example: `podman inspect alpine
+  podman inspect --format "imageId: {{.Id}} size: {{.Size}}" alpine`,
 	}
 )
 
@@ -35,21 +34,25 @@ func init() {
 		Command: inspectCmd,
 	})
 	inspectOpts = common.AddInspectFlagSet(inspectCmd)
+	flags := inspectCmd.Flags()
+	flags.StringVarP(&inspectOpts.Type, "type", "t", "", "Return JSON for specified type, (image or container) (default \"all\")")
+	if !registry.IsRemote() {
+		flags.BoolVarP(&inspectOpts.Latest, "latest", "l", false, "Act on the latest container podman is aware of (containers only)")
+	}
 }
 
 func inspect(cmd *cobra.Command, args []string) error {
-	// First check if the input is even valid for an image
-	if _, err := reference.Parse(args[0]); err == nil {
-		if found, err := registry.ImageEngine().Exists(context.Background(), args[0]); err != nil {
-			return err
-		} else if found.Value {
-			return images.Inspect(cmd, args, inspectOpts)
-		}
-	}
-	if found, err := registry.ContainerEngine().ContainerExists(context.Background(), args[0]); err != nil {
-		return err
-	} else if found.Value {
+	switch inspectOpts.Type {
+	case "image":
+		return images.Inspect(cmd, args, inspectOpts)
+	case "container":
 		return containers.Inspect(cmd, args, inspectOpts)
+	case "":
+		if err := images.Inspect(cmd, args, inspectOpts); err == nil {
+			return nil
+		}
+		return containers.Inspect(cmd, args, inspectOpts)
+	default:
+		return fmt.Errorf("invalid type %q is must be 'container' or 'image'", inspectOpts.Type)
 	}
-	return fmt.Errorf("%s not found on system", args[0])
 }

pkg/domain/entities/types.go

@@ -50,6 +50,7 @@ type InspectOptions struct {
 	Format string `json:",omitempty"`
 	Latest bool   `json:",omitempty"`
 	Size   bool   `json:",omitempty"`
+	Type   string `json:",omitempty"`
 }
 
 // All API and CLI diff commands and diff sub-commands use the same options