我正在尝试通过svn安装symfony，按照说明：
Installing from Subversion (recommended)
If you use Subversion, it is even better to use the svn:externals property to embed symfony into your project in the lib/vendor/ directory:
$ svn pe svn:externals lib/vendor/
If everything goes well, this command will run your favorite editor to give you the opportunity to configure the external Subversion sources.
所以我的项目文件在/ var / www / myproject里面，在myproject里面我有/ lib / vendor 当我尝试做svn pe svn：externals lib / vendor /我收到以下错误：
svn: 'lib/vendor' is not a working copy
任何想法为什么？
所以我认为lib / vendor中没有.svn文件夹，所以我尝试使用svn添加lib / vendor然后它给了我：
svn: 'lib' is not a working copy