Merge pull request #528 from urfave/backport-no-arg-reordering

Backport no argument reordering as an option

command.go

@@ -46,6 +46,11 @@ type Command struct {
 	Flags []Flag
 	// Treat all flags as normal arguments if true
 	SkipFlagParsing bool
+	// Skip argument reordering which attempts to move flags before arguments,
+	// but only works if all flags appear after all arguments. This behavior was
+	// removed n version 2 since it only works under specific conditions so we
+	// backport here by exposing it as an option for compatibility.
+	SkipArgReorder bool
 	// Boolean to hide built-in help command
 	HideHelp bool
 	// Boolean to hide this command from help or completion
@@ -89,7 +94,9 @@ func (c Command) Run(ctx *Context) (err error) {
 	set := flagSet(c.Name, c.Flags)
 	set.SetOutput(ioutil.Discard)
 
-	if !c.SkipFlagParsing {
+	if c.SkipFlagParsing {
+		err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
+	} else if !c.SkipArgReorder {
 		firstFlagIndex := -1
 		terminatorIndex := -1
 		for index, arg := range ctx.Args() {
@@ -121,10 +128,6 @@ func (c Command) Run(ctx *Context) (err error) {
 		} else {
 			err = set.Parse(ctx.Args().Tail())
 		}
-	} else {
-		if c.SkipFlagParsing {
-			err = set.Parse(append([]string{"--"}, ctx.Args().Tail()...))
-		}
 	}
 
 	if err != nil {

command_test.go

@@ -13,12 +13,18 @@ func TestCommandFlagParsing(t *testing.T) {
 	cases := []struct {
 		testArgs        []string
 		skipFlagParsing bool
+		skipArgReorder  bool
 		expectedErr     error
 	}{
-		{[]string{"blah", "blah", "-break"}, false, errors.New("flag provided but not defined: -break")}, // Test normal "not ignoring flags" flow
-		{[]string{"blah", "blah"}, true, nil},                                                            // Test SkipFlagParsing without any args that look like flags
-		{[]string{"blah", "-break"}, true, nil},                                                          // Test SkipFlagParsing with random flag arg
-		{[]string{"blah", "-help"}, true, nil},                                                           // Test SkipFlagParsing with "special" help flag arg
+		// Test normal "not ignoring flags" flow
+		{[]string{"test-cmd", "blah", "blah", "-break"}, false, false, errors.New("flag provided but not defined: -break")},
+
+		// Test no arg reorder
+		{[]string{"test-cmd", "blah", "blah", "-break"}, false, true, nil},
+
+		{[]string{"test-cmd", "blah", "blah"}, true, false, nil},   // Test SkipFlagParsing without any args that look like flags
+		{[]string{"test-cmd", "blah", "-break"}, true, false, nil}, // Test SkipFlagParsing with random flag arg
+		{[]string{"test-cmd", "blah", "-help"}, true, false, nil},  // Test SkipFlagParsing with "special" help flag arg
 	}
 
 	for _, c := range cases {
@@ -35,10 +41,10 @@ func TestCommandFlagParsing(t *testing.T) {
 			Usage:           "this is for testing",
 			Description:     "testing",
 			Action:          func(_ *Context) error { return nil },
+			SkipFlagParsing: c.skipFlagParsing,
+			SkipArgReorder:  c.skipArgReorder,
 		}
 
-		command.SkipFlagParsing = c.skipFlagParsing
-
 		err := command.Run(context)
 
 		expect(t, err, c.expectedErr)