jclouds/jclouds — pull request #1021 by nacx (2012-12-02 19:17:32+00:00)
Title: Do not try to install RubyGems if already installed

If the InstallRuby statement is used in a machine that already has Ruby and RubyGems, the statement fails to install the latter. This commit fixes it by introducing a check to test if the gem command already exists.