Update README.md

README.md

@@ -16,3 +16,94 @@
 
 > 如果报错 `--RPC failed，curl 18 transfer closed with outstanding read data remaining`是因为项目太久，tag资源文件太大。
 可以通过`git config --global http.postBuffer 524288000`解决
+
+# 使用国内镜像安装HomeBrew
+
+Mac下使用国内镜像安装Homebrew
+
+First
+
+MBP上的brew很老了，就想把brew更新一下，顺便安装一下NodeJs。无奈更新的过程一直卡在网络下载，毫不动弹。想想，应该是Repo访问不到的原因，于是重装brew。
+
+根据官网上的方法，在终端输入：
+
+```sh
+/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
+```
+结果还是被卡在下载阶段，怎么办呢？于是上网搜索到了“Homebrew 的安装方法(官方的方法老是安装失败) 第三方”这篇文章。
+
+依文中所述，进行安装。由于官方弃用了旧的homebrew仓库，将homebrew程序与软件包拆分成了两个仓库。与文中描述不符，也未能成功安装。于是稍作修改，记录于此。
+
+## 国内的镜像
+新增brew.git与homebrew-core.git镜像
+
+由于官方弃用了旧的homebrew仓库，将homebrew程序与软件包拆分成了两个仓库。为保证用户正常升级，旧镜像将暂时保留一段时间，择期删除。
+
+仓库对应关系：
+
+> github.com/Homebrew/brew -> mirrors.ustc.edu.cn/brew.git
+
+> github.com/Homebrew/homebrew-core -> mirrors.ustc.edu.cn/homebrew-core.git
+
+> github.com/Homebrew/homebrew(弃用) -> mirrors.ustc.edu.cn/homebrew.git
+
+引自：新增brew.git与homebrew-core.git镜像
+
+## 安装
+获取install文件并编辑
+```sh
+cd ~
+curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install >> brew_install
+```
+
+编辑brew_install文件
+```sh
+#!/System/Library/Frameworks/Ruby.framework/Versions/Current/usr/bin/ruby
+# This script installs to /usr/local only. To install elsewhere you can just
+# untar https://github.com/Homebrew/brew/tarball/master anywhere you like or
+# change the value of HOMEBREW_PREFIX.
+HOMEBREW_PREFIX = "/usr/local".freeze
+HOMEBREW_REPOSITORY = "/usr/local/Homebrew".freeze
+HOMEBREW_CACHE = "#{ENV["HOME"]}/Library/Caches/Homebrew".freeze
+HOMEBREW_OLD_CACHE = "/Library/Caches/Homebrew".freeze
+#BREW_REPO = "https://github.com/Homebrew/brew".freeze
+BREW_REPO = "git://mirrors.ustc.edu.cn/brew.git".freeze
+#CORE_TAP_REPO = "https://github.com/Homebrew/homebrew-core".freeze
+CORE_TAP_REPO = "git://mirrors.ustc.edu.cn/homebrew-core.git".freeze
+```
+
+注释掉BREW_REPO = "https://github.com/Homebrew/brew".freeze和CORE_TAP_REPO = "https://github.com/Homebrew/homebrew-core".freeze
+
+修改为BREW_REPO = "git://mirrors.ustc.edu.cn/brew.git".freeze和CORE_TAP_REPO = "git://mirrors.ustc.edu.cn/homebrew-core.git".freeze
+
+安装
+```sh
+/usr/bin/ruby ~/brew_install 
+```
+
+运行修改了的brew_install文件。
+
+## 替换homebrew源
+
+替换homebrew默认源
+```sh
+cd "$(brew --repo)"
+git remote set-url origin git://mirrors.ustc.edu.cn/brew.git
+```
+
+## 替换homebrew-core源
+```sh
+cd "$(brew --repo)/Library/Taps/homebrew/homebrew-core"
+git remote set-url origin git://mirrors.ustc.edu.cn/homebrew-core.git
+```
+
+## brew更新
+```sh
+brew update
+```
+
+## 设置 bintray镜像
+```sh
+echo 'export HOMEBREW_BOTTLE_DOMAIN=https://mirrors.ustc.edu.cn/homebrew-bottles' >> ~/.bash_profile
+source ~/.bash_profile
+```