Merge pull request #157 from dajulia3/pull_request

stop flag parsing after terminator --

command.go

@@ -56,18 +56,30 @@ func (c Command) Run(ctx *Context) error {
 	set.SetOutput(ioutil.Discard)
 
 	firstFlagIndex := -1
+	terminatorIndex := -1
 	for index, arg := range ctx.Args() {
-		if strings.HasPrefix(arg, "-") {
-			firstFlagIndex = index
+		if arg == "--" {
+			terminatorIndex = index
 			break
+		} else if strings.HasPrefix(arg, "-") && firstFlagIndex == -1 {
+			firstFlagIndex = index
 		}
 	}
 
 	var err error
 	if firstFlagIndex > -1 && !c.SkipFlagParsing {
 		args := ctx.Args()
-		regularArgs := args[1:firstFlagIndex]
-		flagArgs := args[firstFlagIndex:]
+		regularArgs := make([]string, len(args[1:firstFlagIndex]))
+		copy(regularArgs, args[1:firstFlagIndex])
+
+		var flagArgs []string
+		if terminatorIndex > -1 {
+			flagArgs = args[firstFlagIndex:terminatorIndex]
+			regularArgs = append(regularArgs, args[terminatorIndex:]...)
+		} else {
+			flagArgs = args[firstFlagIndex:]
+		}
+
 		err = set.Parse(append(flagArgs, regularArgs...))
 	} else {
 		err = set.Parse(ctx.Args().Tail())