Convert TextMate snippets to Sublime Text 2 snippets

tm_to_subl.rb

require 'nokogiri'
require 'fileutils'
require 'active_support/inflector'

def friendly_filename(filename)
  filename.gsub(/[^\w\s_-]+/, '')
    .gsub(/(^|\b\s)\s+($|\s?\b)/, '\\1\\2')
    .gsub(/\s/, '_')
end

# allowed keys from tm snippets
valid_keys = ['content', 'name', 'tabTrigger', 'scope']

# maps tm tags to subl tags
keys_mapping = {
  'content'    => 'content',
  'name'       => 'description',
  'tabTrigger' => 'tabTrigger',
  'scope'      => 'scope'
}

path = File.expand_path '.'
collections = Dir.entries('tm_snippets').reject {|e| e.length < 3}

collections.each do |collection|
  # create directories for Sublime snippets, remove exsiting ones
  FileUtils.rm_rf("#{path}/subl_snippets/#{collection}")
  Dir.mkdir("#{path}/subl_snippets/#{collection}")

  # snippets file names
  tm_names = Dir.entries("#{path}/tm_snippets/#{collection}").reject {|f| f.length < 3}
  
  tm_names.each do |name|
    # hash to containt tm snippet data
    dict = {}
    # parse tm snippets
    doc = Nokogiri::XML(File.open("#{path}/tm_snippets/#{collection}/#{name}"))
    # get all keys tags
    keys = doc.xpath '//key'

    # read next element of each tag which is the string tag
    keys.each do |key|
      dict[key.text] = key.next_element.text if valid_keys.include?(key.text)
    end

    # build subl xml doc
     builder = Nokogiri::XML::Builder.new do |xml|
      xml.snippet do 
        dict.each do |key,value|
          xml.send(keys_mapping[key], value)
        end
      end
    end

    # create subl xml document
    doc = builder.doc

    # get xml doc without the xml declaration element
    xml = doc.root.to_s

    file_name = name
    
    # save xml data to file
    File.open("#{path}/subl_snippets/#{collection}/#{file_name}.sublime-snippet", 'w') {|file| file.write(xml)}
  end
end