Vendorfile for fetching all jQuery UI components

gistfile1.rb

# Vendorfile for use with vendorer command. https://github.com/grosser/vendorer
# Run `vendorer` to install jQuery and jQuery UI dependencies into vendor/assets/javascripts.

JQUERY_VER = "1.7.1"
JQUERY_UI_VER = "1.8.16"


# Helper methods to extend vendorer functionality #
###################################################

# Given a path to a clone of the jQuery UI repo, build and minify the code,
# then prune the directory so that it contains only the .js and .min.js build products.
# The result will be .js and .min.js files for all the jQuery UI components.
def build_and_assemble_jquery_ui(path)
  Dir.chdir("#{path}/build") do
    puts "Building jQuery UI. This will take a few minutes..."
    run "ant"
  end
  Dir.chdir(path) do
    Dir["*", ".gitignore"].each { |f| run "rm -rf '#{f}'" unless f == "build" }
    run "mv build/dist/jquery-ui-#{JQUERY_UI_VER}/ui/* ."
    run "rm -rf build"
  end
end

# Given a path to a jQuery UI CSS theme file, find all the images referenced
# by the CSS and fetch them as vendor dependencies.
def fetch_jquery_theme_images(theme_css)
  IO.readlines(theme_css).each do |line|
    if (m = line.match /url\((images\/[^\)]+)\)/)    
      file m[1], "http://code.jquery.com/ui/#{JQUERY_UI_VER}/themes/redmond/#{m[1]}"
    end
  end
end


# Vendorfile #
##############

folder "vendor/assets/javascripts" do
  file "jquery.js"       , "http://code.jquery.com/jquery-#{JQUERY_VER}.js"
  file "jquery.min.js"   , "http://code.jquery.com/jquery-#{JQUERY_VER}.min.js"
  file "jquery-ui.js"    , "http://code.jquery.com/ui/#{JQUERY_UI_VER}/jquery-ui.js"
  file "jquery-ui.min.js", "http://code.jquery.com/ui/#{JQUERY_UI_VER}/jquery-ui.min.js"
  
  folder "jquery-ui", "git://github.com/jquery/jquery-ui.git", :tag => JQUERY_UI_VER do |path|
    build_and_assemble_jquery_ui(path)
  end
  
  folder "jquery-ui/themes/redmond" do
    file "jquery-ui.redmond.css", "http://code.jquery.com/ui/#{JQUERY_UI_VER}/themes/redmond/jquery-ui.css" do |css|
      fetch_jquery_theme_images(css)
    end
  end
end