Allow callers to bypass cmdutil.CheckError() logging

pkg/kubectl/cmd/util/helpers.go

@@ -88,23 +88,26 @@ func DefaultBehaviorOnFatal() {
 	fatalErrHandler = fatal
 }
 
-// fatal prints the message if set and then exits. If V(2) or greater, glog.Fatal
-// is invoked for extended information.
+// fatal prints the message (if provided) and then exits. If V(2) or greater,
+// glog.Fatal is invoked for extended information.
 func fatal(msg string, code int) {
+	if glog.V(2) {
+		glog.FatalDepth(2, msg)
+	}
 	if len(msg) > 0 {
 		// add newline if needed
 		if !strings.HasSuffix(msg, "\n") {
 			msg += "\n"
 		}
-
-		if glog.V(2) {
-			glog.FatalDepth(2, msg)
-		}
 		fmt.Fprint(os.Stderr, msg)
 	}
 	os.Exit(code)
 }
 
+// ErrExit may be passed to CheckError to instruct it to output nothing but exit with
+// status code 1.
+var ErrExit = fmt.Errorf("exit")
+
 // CheckErr prints a user friendly error to STDERR and exits with a non-zero
 // exit code. Unrecognized errors will be printed with an "error: " prefix.
 //
@@ -130,6 +133,9 @@ func checkErr(prefix string, err error, handleErr func(string, int)) {
 	switch {
 	case err == nil:
 		return
+	case err == ErrExit:
+		handleErr("", DefaultErrorExitCode)
+		return
 	case kerrors.IsInvalid(err):
 		details := err.(*kerrors.StatusError).Status().Details
 		s := fmt.Sprintf("%sThe %s %q is invalid", prefix, details.Kind, details.Name)