真的很简单。使用bzr branch lp:PROJECTNAME。
示例(此计算机上没有启动板登录名或键):
$ bzr branch lp:bzr
You have not informed bzr of your Launchpad ID, and you must do this to
write to Launchpad or access private data. See "bzr help launchpad-login".
Run Code Online (Sandbox Code Playgroud)
然后继续下载代码。