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Raspberry PiにRuby 2.1.5を入れてみた

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Raspberry Pi+Raspbianの環境に、新しいRubyを入れています。

$ cat /etc/os-release
PRETTY_NAME="Raspbian GNU/Linux 7 (wheezy)"

$ uname -a
Linux raspberrypi 3.12.28+ #709 PREEMPT Mon Sep 8 15:28:00 BST 2014 armv6l GNU/Linux

$ ruby -v
ruby 1.9.3p194 (2012-04-20 revision 35410) [arm-linux-eabihf]

準備

Rubyのバージョンを切り替えるrbenvを入れます。

$ git clone https://github.com/sstephenson/rbenv.git ~/.rbenv
$ git clone https://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build

$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
$ echo 'eval "$(rbenv init -)"' >> ~/.bash_profile
$ source ~/.bash_profile

インストールできるバージョンを調べる。

$ rbenv install --list
Available versions:
  1.8.6-p383
  1.8.6-p420
(略)
  2.1.3
  2.1.4
  2.1.5
(略)

Ruby 2.1.5のインストール

頭にtimeがついているのは処理時間を計測するためです。本来は不要。

$ time rbenv install 2.1.5
Downloading ruby-2.1.5.tar.gz...
-> http://dqw8nmjcqpjn7.cloudfront.net/4305cc6ceb094df55210d83548dcbeb5117d74eea25196a9b14fa268d354b100
Installing ruby-2.1.5...
Installed ruby-2.1.5 to /home/pi/.rbenv/versions/2.1.5


real	137m34.468s
user	128m43.180s
sys	4m34.110s

2時間強かかりました。

バージョン切替

$ rbenv versions
* system (set by /home/pi/.rbenv/version)
  2.1.5

ちゃんと2.1.5が入ってますね。

$ rbenv global 2.1.5
$ rbenv rehash
$ ruby -v
ruby 2.1.5p273 (2014-11-13 revision 48405) [armv6l-linux-eabihf]

でけた!

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