一、Scroller（OverScroller）
$mkdir ~/bin
$curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$chmod a+x ~/bin/repo
$echo “export PATH=~/bin:$PATH” » ~/.bash_profile
repo init -u https://git.jd.com/yangbo243/jdidmanifest.git
repo sync -j4
https://gerrit.googlesource.com/git-repo/+/master/docs/manifest-format.md#Element-project