add OutputsRawFormat helper; default show-all on multiple resource kinds

pkg/kubectl/cmd/get.go

@@ -182,13 +182,14 @@ func RunGet(f cmdutil.Factory, out, errOut io.Writer, cmd *cobra.Command, args [
 		return cmdutil.UsageError(cmd, usageString)
 	}
 
-	// always show resources when getting by name or filename
 	argsHasNames, err := resource.HasNames(args)
 	if err != nil {
 		return err
 	}
-	output := cmdutil.GetFlagString(cmd, "output")
+
-	if len(options.Filenames) > 0 || argsHasNames || output == "json" || output == "yaml" {
+	// always show resources when getting by name or filename, or if the output
+	// is machine-consumable, or if multiple resource kinds were requested.
+	if len(options.Filenames) > 0 || argsHasNames || cmdutil.OutputsRawFormat(cmd) || resource.MultipleTypesRequested(args) {
 		if !cmd.Flag("show-all").Changed {
 			cmd.Flag("show-all").Value.Set("true")
 		}

pkg/kubectl/cmd/util/helpers.go

@@ -729,3 +729,19 @@ func RequireNoArguments(c *cobra.Command, args []string) {
 		CheckErr(UsageError(c, fmt.Sprintf(`unknown command %q`, strings.Join(args, " "))))
 	}
 }
+
+// OutputsRawFormat determines if a command's output format is machine parsable
+// or returns false if it is human readable (name, wide, etc.)
+func OutputsRawFormat(cmd *cobra.Command) bool {
+	output := GetFlagString(cmd, "output")
+	if output == "json" ||
+		output == "yaml" ||
+		output == "go-template" ||
+		output == "go-template-file" ||
+		output == "jsonpath" ||
+		output == "jsonpath-file" {
+		return true
+	}
+
+	return false
+}