下载android源码出错解决办法

获取Android源代码使用repo sync命令，但经常会出错，导致获取不了最新的代码。

　　出现以下的类似错误：

From https://android.googlesource.com/platform/manifest

 * [new branch]      android-cts-2.3_r12 -> origin/android-cts-2.3_r12

 * [new tag]         android-cts-2.3_r12 -> android-cts-2.3_r12

Exception in thread Thread-1:

Traceback (most recent call last):

  File "/usr/lib/python2.6/threading.py", line 532, in __bootstrap_inner

    self.run()

  File "/usr/lib/python2.6/threading.py", line 484, in run

    self.__target(*self.__args, **self.__kwargs)

  File "/cygdrive/f/OpenSource/Android/.repo/repo/subcmds/sync.py", line 186, in _FetchHelper

    current_branch_only=opt.current_branch_only)

  File "/cygdrive/f/OpenSource/Android/.repo/repo/project.py", line 929, in Sync_NetworkHalf

    current_branch_only=current_branch_only):

  File "/cygdrive/f/OpenSource/Android/.repo/repo/project.py", line 1428, in _RemoteFetch

    if GitCommand(self, cmd, bare=True, ssh_proxy=ssh_proxy).Wait() == 0:

  File "/cygdrive/f/OpenSource/Android/.repo/repo/git_command.py", line 215, in __init__

    raise GitError('%s: %s' % (command[1], e))

GitError: fetch: [Errno 13] Permission denied

　　上网查了一番，发现到相应的工程运行一下git checkout -f就可以解决了。但是每次这样搞法也是费时费力啊。

　　查了一下repo的命令参数，发现repo forall可以对所有项目执行一个命令。于是就有了以下的解决办法：

 

repo forall -c git checkout -f

repo sync -f