Add git.Checkout

commands/checkout.go

 package commands
 
+import (
+	"github.com/jingweno/gh/git"
+	"github.com/jingweno/gh/utils"
+)
+
 var cmdCheckout = &Command{
 	Run:          checkout,
 	GitExtension: true,
@@ -7,5 +12,22 @@ var cmdCheckout = &Command{
 	Short:        "Switch the active branch to another branch",
 }
 
+/**
+  $ gh checkout https://github.com/jingweno/gh/pull/73
+  # > git remote add -f -t feature git://github:com/foo/gh.git
+  # > git checkout --track -B foo-feature foo/feature
+
+  $ gh checkout https://github.com/jingweno/gh/pull/73 custom-branch-name
+**/
 func checkout(command *Command, args []string) {
+	if len(args) > 0 {
+		args = transformCheckoutArgs(args)
+	}
+
+  err := git.ExecCheckout(args)
+	utils.Check(err)
+}
+
+func transformCheckoutArgs(args []string) []string {
+  return nil
 }

commands/commands.go

@@ -20,7 +20,7 @@ type Command struct {
 
 func (c *Command) PrintUsage() {
 	if c.GitExtension {
-		err := git.Help(c.Name())
+		err := git.ExecHelp(c.Name())
 		utils.Check(err)
 	} else {
 		if c.Runnable() {

commands/remote.go

@@ -29,7 +29,7 @@ func remote(command *Command, args []string) {
 		args = transformRemoteArgs(args)
 	}
 
-	err := git.ExecRemote(args)
+	err := git.ExecRemote(args...)
 	utils.Check(err)
 }
 

git/git.go

@@ -109,14 +109,12 @@ func Remote() (string, error) {
 	return "", errors.New("Can't find git remote (push)")
 }
 
-func ExecRemote(args []string) error {
-	cmd := cmd.New("git")
-	cmd.WithArg("remote")
-	for _, i := range args {
-		cmd.WithArg(i)
-	}
+func ExecRemote(args ...string) error {
+	cmdArgs := make([]string, 0)
+	cmdArgs = append(cmdArgs, "checkout")
+	cmdArgs = append(cmdArgs, args...)
 
-	return cmd.SysExec()
+	return sysExec(cmdArgs...)
 }
 
 func AddRemote(name, url string) error {
@@ -125,12 +123,16 @@ func AddRemote(name, url string) error {
 	return err
 }
 
-func Help(command string) error {
-	cmd := cmd.New("git")
-	cmd.WithArg(command)
-	cmd.WithArg("--help")
+func ExecCheckout(args []string) error {
+	cmdArgs := make([]string, 0)
+	cmdArgs = append(cmdArgs, "checkout")
+	cmdArgs = append(cmdArgs, args...)
 
-	return cmd.SysExec()
+	return sysExec(cmdArgs...)
+}
+
+func ExecHelp(command string) error {
+	return sysExec("help", command, "--help")
 }
 
 func Log(sha1, sha2 string) (string, error) {
@@ -149,6 +151,15 @@ func Log(sha1, sha2 string) (string, error) {
 	return outputs, nil
 }
 
+func sysExec(args ...string) error {
+	cmd := cmd.New("git")
+	for _, a := range args {
+		cmd.WithArg(a)
+	}
+
+	return cmd.SysExec()
+}
+
 func execGitCmd(input []string) (outputs []string, err error) {
 	cmd := cmd.New("git")
 	for _, i := range input {