MacOS多次踩坑后成功安装Homebrew

来一次性成功安装Homebrew吧

官网提供的安装脚本无法成功安装Homebrew，原因大家都懂的，故采用脚本安装的方式。

下载homebrew的安装脚本brew_install

在Download路径下执行如下脚本

curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install >> brew_install

修改brew_install脚本

修改brew_install脚本。如果你的脚本打开之后是如下内容：

#!/usr/bin/ruby
  
STDERR.print <<EOS
Warning: The Ruby Homebrew installer is now deprecated and has been rewritten in
Bash. Please migrate to the following command:
  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

EOS

Kernel.exec "/bin/bash", "-c", '/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"'

那么你需要直接打开链接Homebrew完整的install脚本，然后替换本地brew_install.sh的内容，并且修改脚本中BREW_REPO的值，如下：
BREW_REPO="https://mirrors.ustc.edu.cn/brew.git"
从改镜像库中下载资源。

执行brew_install脚本

要执行该脚本，首先更改脚本的权限，执行如下命令：

chmod 755 brew_install

然后执行安装命令：

./brew_install

之后会卡住，需要执行如下脚本：

git clone git://mirrors.ustc.edu.cn/homebrew-core.git/ /usr/local/Homebrew/Library/Taps/homebrew/homebrew-core --depth=1

出现如下内容：

==> This script will install:
/usr/local/bin/brew
/usr/local/share/doc/homebrew
/usr/local/share/man/man1/brew.1
/usr/local/share/zsh/site-functions/_brew
/usr/local/etc/bash_completion.d/brew
/usr/local/Homebrew

Press RETURN to continue or any other key to abort
==> Downloading and installing Homebrew...
HEAD is now at 270fd422d Merge pull request #7534 from MikeMcQuaid/outdated-version
Already up-to-date.
==> Installation successful!

==> Homebrew has enabled anonymous aggregate formulae and cask analytics.
Read the analytics documentation (and how to opt-out) here:
  https://docs.brew.sh/Analytics
No analytics data has been sent yet (or will be during this `install` run).

==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
  https://github.com/Homebrew/brew#donations

==> Next steps:
- Run `brew help` to get started
- Further documentation: 
    https://docs.brew.sh

安装就成功了。可以执行brew help验证。