cmd/ipfs2: Made error messages more visible

cmd/ipfs2/main.go

@@ -23,14 +23,17 @@ import (
 // log is the command logger
 var log = u.Logger("cmd/ipfs")
 
-const heapProfile = "ipfs.mprof"
+const (
+	heapProfile = "ipfs.mprof"
+	errorFormat = "ERROR: %v\n\n"
+)
 
 func main() {
 	args := os.Args[1:]
 	req, root := createRequest(args)
 	handleOptions(req, root)
 	res := callCommand(req, root)
-	outputResponse(res)
+	outputResponse(res, root)
 
 	if u.Debug {
 		err := writeHeapProfileToFile()
@@ -57,17 +60,18 @@ func createRequest(args []string) (cmds.Request, *cmds.Command) {
 	// e.g. incorrect number of args, or nonexistent subcommand)
 	if err != nil {
 		// if the -help flag wasn't specified, show the error message
-		if options != nil {
-			opt, _ := options.Option("help")
-			help, _ := opt.(bool)
-			if !help {
-				fmt.Println(err)
+		// or if a path was returned (user specified a valid subcommand), show the error message
+		// (this means there was an option or argument error)
+		if options != nil || path != nil && len(path) > 0 {
+			help := false
+			if options != nil {
+				opt, _ := options.Option("help")
+				help, _ = opt.(bool)
 			}
 
-		} else if path != nil && len(path) > 0 {
-			// if a path was returned (user specified a valid subcommand), show the error message
-			// (this means there was an option or argument error)
-			fmt.Println(err)
+			if !help {
+				fmt.Printf(errorFormat, err)
+			}
 		}
 
 		// when generating help for the root command, we don't want the autogenerated subcommand text
@@ -222,13 +226,17 @@ func callCommand(req cmds.Request, root *cmds.Command) cmds.Response {
 	return res
 }
 
-func outputResponse(res cmds.Response) {
+func outputResponse(res cmds.Response, root *cmds.Command) {
 	if res.Error() != nil {
-		fmt.Println(res.Error().Error())
+		fmt.Printf(errorFormat, res.Error().Error())
 
-		if res.Request().Command().Help != "" && res.Error().Code == cmds.ErrClient {
-			// TODO: convert from markdown to ANSI terminal format?
-			fmt.Println(res.Request().Command().Help)
+		if res.Error().Code == cmds.ErrClient {
+			helpText, err := cmdsCli.HelpText("ipfs", root, res.Request().Path())
+			if err != nil {
+				fmt.Println(err.Error())
+			} else {
+				fmt.Println(helpText)
+			}
 		}
 
 		os.Exit(1)