替换homebrew镜像源

replace homebrew mirrors

当我们brew update或者brew install xxx时，异常的慢，本事原因还是国内网络环境github下载慢导致。
我们可以更换Homebrew源, 从https://mirrors.ustc.edu.cn/上搜索各对应的源

cd "$(brew --repo)" （正常放置在/usr/local/Homebrew)
git remote set-url origin https://mirrors.ustc.edu.cn/brew.git/

# 替换homebrew-core
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git/

# 替换homebrew-cask
cd "$(brew --repo)/Library/Taps/homebrew/homebrew-cask"
git remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git/

# 替换homebrew-bottles:
echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.zshrc