feat(cli): add basic bundle info command

cmd/cli/command/app/info.go

@@ -0,0 +1,56 @@
+package app
+
+import (
+	"os"
+
+	"forge.cadoles.com/arcad/edge/pkg/app"
+	"forge.cadoles.com/arcad/edge/pkg/bundle"
+	"github.com/pkg/errors"
+	"github.com/urfave/cli/v2"
+	"gopkg.in/yaml.v2"
+)
+
+func InfoCommand() *cli.Command {
+	return &cli.Command{
+		Name:  "info",
+		Usage: "Print app manifest informations",
+		Flags: []cli.Flag{
+			&cli.StringFlag{
+				Name:     "path",
+				Usage:    "use `PATH` as app bundle (zip, zim or directory bundle)",
+				Aliases:  []string{"p"},
+				Value:    "",
+				Required: true,
+			},
+		},
+		Action: func(ctx *cli.Context) error {
+			appPath := ctx.String("path")
+
+			bundle, err := bundle.FromPath(appPath)
+			if err != nil {
+				return errors.Wrap(err, "could not load app bundle")
+			}
+
+			manifest, err := app.LoadManifest(bundle)
+			if err != nil {
+				return errors.Wrap(err, "could not load app manifest")
+			}
+
+			if valid, err := manifest.Validate(manifestMetadataValidators...); !valid {
+				return errors.Wrap(err, "invalid app manifest")
+			}
+
+			encoder := yaml.NewEncoder(os.Stdout)
+
+			if err := encoder.Encode(manifest); err != nil {
+				return errors.Wrap(err, "could not encode manifest")
+			}
+
+			if err := encoder.Close(); err != nil {
+				return errors.WithStack(err)
+			}
+
+			return nil
+		},
+	}
+}

cmd/cli/command/app/root.go

@@ -12,6 +12,7 @@ func Root() *cli.Command {
 			RunCommand(),
 			PackageCommand(),
 			HashPasswordCommand(),
+			InfoCommand(),
 		},
 	}
 }