syntax_highlighting.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 code 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")
        elif name == "factories.rb":
            set_syntax(view, "RSpec", "User")
        elif name == "gemfile":
            set_syntax(view, "Ruby on Rails", "Rails")
        elif name == "guardfile":
            set_syntax(view, "Ruby on Rails", "Rails")
        elif name[-3:] == ".rb":
            set_syntax(view, "Ruby on Rails", "Rails")
        elif name[-5:] == ".scss":
            set_syntax(view, "SASS", "SASS/Syntaxes")


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