~/Library/Application\ Support/Sublime\ Text\ 2/Packages/User/syntax_highlighting.py

gistfile1.py

import sublime, sublime_plugin
import os

class DetectFileTypeCommand(sublime_plugin.EventListener):
  """ Detects current file type if the file's extension isn't conclusive """
  """ Modified for Ruby on Rails and Sublime Text 2 """
  """ Original pastie here: http://pastie.org/private/kz8gtts0cjcvkec0d4quqa """

  def on_load(self, view):
    filename = view.file_name()
    if not filename: # buffer has never been saved
      return

    name = os.path.basename(filename.lower())
    if name[-8:] == "_spec.rb":
      set_syntax(view, "Rspec", "User/rspec")
    elif name[-8:] == "_steps.rb":
      set_syntax(view, "Cucumber Steps", "Cucumber")
    elif name == "factories.rb":
      set_syntax(view, "Rspec", "User/rspec")
    elif name == "gemfile":
      set_syntax(view, "Ruby on Rails", "Rails")
    elif name[-2:] == "rb":
      set_syntax(view, "Ruby on Rails", "Rails")


  def set_syntax(view, syntax, path=None):
    if path is None:
      path = syntax
    view.settings().set('syntax', 'Packages5G/'+ path + '/' + syntax + '.tmLanguage')
    print "Switched syntax to: " + syntax