https://developer.apple.com/documentation/ ??
https://opensource.apple.com/ ??
http://help.apple.com/xcode/mac/9.0/ ??
https://developer.apple.com/download/ ??這里是下載
https://gitlab.com/gitlab-org/gitlab-shell/blob/master/README.md ??這里是gitLab
https://www.gitlab.com.cn ??這里是gitLab中文(運(yùn)維什么都做)
https://www.gitlab.com.cn/features/ ??這里是gitLab特性