Updating Brew When It's Blocked on Mac

Running

ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

When installing with this command, it reported that GitHub was inaccessible and brew could not be downloaded.

So the only option was

git clone git://mirrors.tuna.tsinghua.edu.cn/homebrew.git (or git clone http://mirrors.ustc.edu.cn/homebrew.git)

Download, then copy into the /usr/local folder.

After trying

git remote set-url origin http://mirrors.ustc.edu.cn/homebrew.git

and then running brew update, it still said GitHub was inaccessible—quite strange.

I thought of two approaches: one was to modify brew's scripts to force a specific setting, but that was too much trouble.

So in the end I used ShadowsocksX-NG, connected directly to the server, opened port 1087 as an HTTP proxy, and in the terminal used:

export https_proxy=http://127.0.0.1:1087

Then brew succeeded.