Homebrew切换镜像源

切换中科大镜像源：

1. 替换brew.git

   cd /usr/local/Homebrew
   
   git remote set-url origin https://mirrors.ustc.edu.cn/brew.git

切换回官方源：

https://github.com/Homebrew/brew

2. 替换homebrew-core.git

   cd /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core
   
   git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git
   
   brew update

切换官方源：

https://github.com/Homebrew/homebrew-core

3. 替换Homebrew Bottles源

   echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.bash_profile
   
   source ~/.bash_profile

切换回官方：

删除~/.bash_profile中的HOMEBREW_BOTTLE_DOMAIN源即可