1. repo工具的安装
$ mkdir ~/bin
$ PATH=~/bin:$PATH //也可以配到环境变量里面去
Download the Repo tool and ensure that it is executable:
$
curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$ chmod a +x ~ /bin/repo
能执行repo help , 表示安装成功了
2.</