From e0489d488c1e6e4e33c4e26f2e12b477afc31a36 Mon Sep 17 00:00:00 2001
From: Brendan Burns <bburns@google.com>
Date: Wed, 11 Mar 2015 11:52:35 -0700
Subject: [PATCH] Fix stripFlags to be more intelligent about what it parses.

---
 command.go      | 29 ++++++++++++++++--
 command_test.go | 81 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 108 insertions(+), 2 deletions(-)
 create mode 100644 command_test.go

diff --git a/command.go b/command.go
index fa9b9e5e..96b7f35a 100644
--- a/command.go
+++ b/command.go
@@ -251,7 +251,23 @@ func (c *Command) resetChildrensParents() {
 	}
 }
 
-func stripFlags(args []string) []string {
+// Test if the named flag is a boolean flag.
+func isBooleanFlag(name string, f *flag.FlagSet) bool {
+	flag := f.Lookup(name)
+	if flag == nil {
+		return false
+	}
+	return flag.Value.Type() == "bool"
+}
+
+// Test if the named flag is a boolean flag.
+func isBooleanShortFlag(name string, f *flag.FlagSet) bool {
+     	result := false
+	f.VisitAll(func (f *flag.Flag) { if f.Shorthand == name && f.Value.Type() == "bool" { result = true } })
+	return result
+}
+
+func stripFlags(args []string, c *Command) []string {
 	if len(args) < 1 {
 		return args
 	}
@@ -259,6 +275,7 @@ func stripFlags(args []string) []string {
 	commands := []string{}
 
 	inQuote := false
+	inFlag := false
 	for _, y := range args {
 		if !inQuote {
 			switch {
@@ -266,8 +283,16 @@ func stripFlags(args []string) []string {
 				inQuote = true
 			case strings.Contains(y, "=\""):
 				inQuote = true
+			case strings.HasPrefix(y, "--") && !strings.Contains(y, "="):
+				// TODO: this isn't quite right, we should really check ahead for 'true' or 'false'
+				inFlag = !isBooleanFlag(y[2:], c.Flags())
+			case strings.HasPrefix(y, "-") && !strings.Contains(y, "=") && len(y) == 2 && !isBooleanShortFlag(y[1:], c.Flags()):
+				inFlag = true
+			case inFlag:
+				inFlag = false
 			case !strings.HasPrefix(y, "-"):
 				commands = append(commands, y)
+				inFlag = false
 			}
 		}
 
@@ -305,7 +330,7 @@ func (c *Command) Find(arrs []string) (*Command, []string, error) {
 
 	innerfind = func(c *Command, args []string) (*Command, []string) {
 		if len(args) > 0 && c.HasSubCommands() {
-			argsWOflags := stripFlags(args)
+			argsWOflags := stripFlags(args, c)
 			if len(argsWOflags) > 0 {
 				matches := make([]*Command, 0)
 				for _, cmd := range c.commands {
diff --git a/command_test.go b/command_test.go
new file mode 100644
index 00000000..ae665221
--- /dev/null
+++ b/command_test.go
@@ -0,0 +1,81 @@
+package cobra
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestStripFlags(t *testing.T) {
+	tests := []struct {
+		input  []string
+		output []string
+	}{
+		{
+			[]string{"foo", "bar"},
+			[]string{"foo", "bar"},
+		},
+		{
+			[]string{"foo", "--bar", "-b"},
+			[]string{"foo"},
+		},
+		{
+			[]string{"-b", "foo", "--bar", "bar"},
+			[]string{},
+		},
+		{
+			[]string{"-i10", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"-i=10", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"--int=100", "echo"},
+			[]string{"echo"},
+		},
+		{
+			[]string{"-ib", "echo", "-bfoo", "baz"},
+			[]string{"echo", "baz"},
+		},
+		{
+			[]string{"-i=baz", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+		{
+			[]string{"--int=baz", "-bbar", "-i", "foo", "blah"},
+			[]string{"blah"},
+		},
+		{
+			[]string{"--cat", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+		{
+			[]string{"-c", "bar", "-i", "foo", "blah"},
+			[]string{"bar", "blah"},
+		},
+	}
+
+	cmdPrint := &Command{
+		Use:   "print [string to print]",
+		Short: "Print anything to the screen",
+		Long:  `an utterly useless command for testing.`,
+		Run: func(cmd *Command, args []string) {
+			tp = args
+		},
+	}
+
+	var flagi int
+	var flagstr string
+	var flagbool bool
+	cmdPrint.Flags().IntVarP(&flagi, "int", "i", 345, "help message for flag int")
+	cmdPrint.Flags().StringVarP(&flagstr, "bar", "b", "bar", "help message for flag string")
+	cmdPrint.Flags().BoolVarP(&flagbool, "cat", "c", false, "help message for flag bool")
+
+	for _, test := range tests {
+		output := stripFlags(test.input, cmdPrint)
+		if !reflect.DeepEqual(test.output, output) {
+			t.Errorf("expected: %v, got: %v", test.output, output)
+		}
+	}
+}