Homebrew安裝多個版本程式 與 建立link

1. 檢視所有的版本
2. 依照版本安裝更新程式
3. 重新建立連結

brew update
brew versions FORMULA

#move to Homebrew's install path
cd `brew --prefix`
git checkout HASH Library/Formula/FORMULA.rb
brew unlink FORMULA(option)
brew install FORMULA

brew switch FORMULA VERSION
git checkout -- Library/Formula/FORMULA.rb(??)


Ex.
$brew update
$brew versions tomcat

7.0.32   git checkout 55cfbdf /usr/local/Library/Formula/tomcat.rb
7.0.30   git checkout ec5e2ca /usr/local/Library/Formula/tomcat.rb
7.0.29   git checkout 1683f9e /usr/local/Library/Formula/tomcat.rb
7.0.28   git checkout 3293f97 /usr/local/Library/Formula/tomcat.rb
7.0.27   git checkout 82498e5 /usr/local/Library/Formula/tomcat.rb
7.0.26   git checkout ee016a5 /usr/local/Library/Formula/tomcat.rb
7.0.25   git checkout 48c1c63 /usr/local/Library/Formula/tomcat.rb
7.0.23   git checkout 09e1800 /usr/local/Library/Formula/tomcat.rb
7.0.21   git checkout 22d9df7 /usr/local/Library/Formula/tomcat.rb
7.0.20   git checkout f857eca /usr/local/Library/Formula/tomcat.rb
7.0.19   git checkout 548514e /usr/local/Library/Formula/tomcat.rb
7.0.16   git checkout 14e4db3 /usr/local/Library/Formula/tomcat.rb
7.0.14   git checkout bdd4756 /usr/local/Library/Formula/tomcat.rb
7.0.6    git checkout 0476235 /usr/local/Library/Formula/tomcat.rb
6.0.26   git checkout 9e18876 /usr/local/Library/Formula/tomcat.rb

2.
cd `brew --prefix`