Merge pull request #1615 from 2opremio/fluxctl-error-context

show more context for errors from fluxctl

cmd/fluxctl/main.go

@@ -12,11 +12,11 @@ func run(args []string) int {
 	rootCmd := newRoot().Command()
 	rootCmd.SetArgs(args)
 	if cmd, err := rootCmd.ExecuteC(); err != nil {
-		err = errors.Cause(err)
-		switch err := err.(type) {
-		case *fluxerr.Error:
-			cmd.Println("== Error ==\n\n" + err.Help)
-		default:
+		// Format flux-specific errors. They can come wrapped,
+		// so we use the cause instead.
+		if cause, ok := errors.Cause(err).(*fluxerr.Error); ok {
+			cmd.Println("== Error ==\n\n" + cause.Help)
+		} else {
 			cmd.Println("Error: " + err.Error())
 			cmd.Printf("Run '%v --help' for usage.\n", cmd.CommandPath())
 		}