From 61e83d23cebb450a71c081e83d3fe087a0fd30bd Mon Sep 17 00:00:00 2001
From: WenHuxian <wenhuxian@gmail.com>
Date: Wed, 14 Jan 2015 11:28:27 +0800
Subject: [PATCH 1/2] add :update support
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

gom 'git.example.com/example', :command => 'git clone
git@git.example.com:example’, :update => 'git fetch'
---
 install.go | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/install.go b/install.go
index f01a795..08502b8 100644
--- a/install.go
+++ b/install.go
@@ -109,15 +109,25 @@ func (gom *Gom) Clone(args []string) error {
 			target = gom.name
 		}
 
+		var customCmd []string
 		srcdir := filepath.Join(vendor, "src", target)
-		customCmd := strings.Split(command, " ")
-		customCmd = append(customCmd, srcdir)
-
-		fmt.Printf("fetching %s (%v)\n", gom.name, customCmd)
-		err = run(customCmd, Blue)
-		if err != nil {
-			return err
+		if _, err := os.Stat(srcdir); err == nil || os.IsExist(err) {
+			if update, ok := gom.options["update"].(string); ok {
+				customCmd = strings.Split(update, " ")
+				customCmd = append(customCmd)
+				fmt.Printf("updating %s (%v)\n", gom.name, customCmd)
+				vcsExec(srcdir, customCmd...)
+			}
+		} else {
+			customCmd := strings.Split(command, " ")
+			customCmd = append(customCmd, srcdir)
+			fmt.Printf("fetching %s (%v)\n", gom.name, customCmd)
+			err = run(customCmd, Blue)
+			if err != nil {
+				return err
+			}
 		}
+
 	} else if private, ok := gom.options["private"].(string); ok {
 		if private == "true" {
 			target, ok := gom.options["target"].(string)

From 27f3cbd16a2e7091cc88734ea688b1a5da11fef9 Mon Sep 17 00:00:00 2001
From: WenHuxian <wenhuxian@gmail.com>
Date: Wed, 14 Jan 2015 18:07:50 +0800
Subject: [PATCH 2/2] update README , add :update => xxx

```
gom 'github.com/username/repository', :command => 'git clone
http://example.com/repository.git', :update => 'git fetch'
```
---
 README.mkd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.mkd b/README.mkd
index 2995903..0166e75 100644
--- a/README.mkd
+++ b/README.mkd
@@ -89,7 +89,7 @@ If you want to bundle specified tag, branch or commit
     
 If you want to bundle a repository that `go get` can't access
 
-    gom 'github.com/username/repository', :command => 'git clone http://example.com/repository.git'
+    gom 'github.com/username/repository', :command => 'git clone http://example.com/repository.git', :update => 'git fetch'
 
 Todo
 ----