Add source bundle validation and inspection

internal/cli/validate.go

@@ -21,7 +21,7 @@ func validateCommand(ctx context.Context, args []string, stdout, stderr io.Write
 	if len(args) == 1 {
 		path = args[0]
 	}
-	if err := app.Validate(ctx, app.ValidateOptions{Path: path}); err != nil {
+	if err := app.Validate(ctx, app.ValidateOptions{Path: path, Stdout: stdout}); err != nil {
 		return fail(stderr, err)
 	}
 	return exitOK
@@ -31,6 +31,6 @@ func printValidateHelp(w io.Writer) {
 	fmt.Fprint(w, `Usage:
   distributor validate <path>
 
-The validate command is present but bundle validation is not implemented yet.
+Validate a local source bundle directory or a tree containing source bundles.
 `)
 }