Ruby.sublime-build

# Get Sublime to use your rvm ruby... Change your ~/Library/Application Support/Sublime Text 2/Packages/Ruby/Ruby.sublime-build 
# (for ST3: ~/Library/Application Support/Sublime Text 3/Packages/User/Ruby.sublime-build) to this, replacing YOURUSERNAME.
# I am still looking to optimize this further... For example, avoiding hardcoding by using something like $HOME, although
# I have yet to get any form of that to work.

{
  "working_dir": "${project_path}",
  "cmd": [
    "/Users/YOURUSERNAME/.rvm/bin/rvm-auto-ruby", "-Ilib:test", "$file"
  ],
  // "path": "/Users/YOURUSERNAME/.rvm/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin",
  "file_regex": "^(...*?):([0-9]*):?([0-9]*)",
  "selector": "source.ruby"
}