======home brew======

=====バージョンを指定してインストール=====

play 2.1.0をインストールしたい場合

<code bash>
$ brew versions play

2.2.1    git checkout 55d2970 /usr/local/Library/Formula/play.rb
2.2.0    git checkout 6b2612d /usr/local/Library/Formula/play.rb
2.1.5    git checkout 39ef434 /usr/local/Library/Formula/play.rb
2.1.4    git checkout e928446 /usr/local/Library/Formula/play.rb
2.1.3    git checkout 698381e /usr/local/Library/Formula/play.rb
2.1.2    git checkout 4bb2ed5 /usr/local/Library/Formula/play.rb
2.1.1    git checkout 1d1f5d2 /usr/local/Library/Formula/play.rb
2.1.0    git checkout 6a70797 /usr/local/Library/Formula/play.rb
2.0.4    git checkout a7f6e06 /usr/local/Library/Formula/play.rb
2.0.3    git checkout 3c5ca25 /usr/local/Library/Formula/play.rb
2.0.2    git checkout 6ba6dc0 /usr/local/Library/Formula/play.rb
2.0.1    git checkout 15976d5 /usr/local/Library/Formula/play.rb
2.0      git checkout 351d751 /usr/local/Library/Formula/play.rb
1.2.4    git checkout 3caf5c5 /usr/local/Library/Formula/play.rb
1.2.3    git checkout bee9712 /usr/local/Library/Formula/play.rb
1.2.2    git checkout 3137b6a /usr/local/Library/Formula/play.rb
1.2.1    git checkout bcdf2d5 /usr/local/Library/Formula/play.rb
1.2      git checkout 744b044 /usr/local/Library/Formula/play.rb
1.1.1    git checkout 0476235 /usr/local/Library/Formula/play.rb
1.1      git checkout eea40ff /usr/local/Library/Formula/play.rb
1.0.3.1  git checkout aa76115 /usr/local/Library/Formula/play.rb
1.0.3    git checkout 19edb1f /usr/local/Library/Formula/play.rb
</code>

git checkoutからをこぴって

<code bash>
$ cd /usr/local/Library/Formula
$ git checkout 6a70797 /usr/local/Library/Formula/play.rb
$ brew install play
</code>