Initial commit

.gitignore

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+*.gem
+.bundle
+Gemfile.lock

Gemfile

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+source 'https://rubygems.org'
+
+# Specify your gem's dependencies in cdnjs-rails.gemspec
+gemspec

LICENSE.txt

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+Copyright (c) 2013 Gregory Eremin
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Cdnjs::Rails
+
+TODO: Write a gem description
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+    gem 'cdnjs-rails'
+
+And then execute:
+
+    $ bundle
+
+Or install it yourself as:
+
+    $ gem install cdnjs-rails
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Contributing
+
+1. Fork it
+2. Create your feature branch (`git checkout -b my-new-feature`)
+3. Commit your changes (`git commit -am 'Add some feature'`)
+4. Push to the branch (`git push origin my-new-feature`)
+5. Create new Pull Request

Rakefile

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+require 'bundler/gem_tasks'
+
+namespace :cdnjs do
+  desc 'Updates packages.json file from cdnjs.com'
+  task :update do
+    require 'open-uri'
+    require 'multi_json'
+
+    packages_url = 'http://cdnjs.com/packages.json'
+    file_path = File.expand_path('../data/packages.json', __FILE__)
+    json = open(packages_url).read
+
+    # Remove all unnecessary data
+    # Keep repo small and code fast
+    data = MultiJson.load(json)['packages'].map do |pkg|
+      {
+        pkg['name'] => {
+          'filename'       => pkg['filename'],
+          'latest_version' => pkg['version'],
+          'versions'       => pkg['assets'].map{ |asset| asset['version'] }
+        }
+      }
+    end.inject(:merge)
+
+    # Format JSON for better diffs and smaller patches
+    json = MultiJson.dump(data, :pretty => true)
+
+    File.open(file_path, 'wb') do |file|
+      file.write json
+      file.close
+    end
+  end
+end

cdnjs-rails.gemspec

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+lib = File.expand_path('../lib', __FILE__)
+$LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
+require 'cdnjs_rails/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = 'cdnjs-rails'
+  spec.version       = CdnjsRails::VERSION
+  spec.authors       = ['Gregory Eremin']
+  spec.email         = ['magnolia_fan@me.com']
+  spec.description   = 'This gem adds view helpers to Ruby on Rails'+
+                       'applications that embed javascripts and'+
+                       'stylesheets directly from cdnjs.com'
+  spec.summary       = 'Rails view helpers for embedding cdnjs.com assets'
+  spec.homepage      = ''
+  spec.license       = 'MIT'
+
+  spec.files         = `git ls-files`.split($/)
+  spec.executables   = []
+  spec.test_files    = [] # spec.files.grep(%r{^(test|spec|features)/})
+  spec.require_paths = ['lib']
+
+  spec.add_development_dependency 'bundler', '~> 1.3'
+  spec.add_development_dependency 'rake'
+  spec.add_runtime_dependency 'multi_json'
+end

lib/cdnjs-rails.rb

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+require 'cdnjs_rails'

lib/cdnjs_rails.rb

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+require 'multi_json'
+require 'cdnjs_rails/railtie' if defined? Rails
+
+module CdnjsRails
+  URL_TEMPLATE = '%s//cdnjs.cloudflare.com/ajax/libs/%s/%s/%s'
+
+  def package_url name, options = {}
+    package = packages[name]
+    raise UnknownPackageError.new(name) if package.nil?
+
+    version = options[:version] || options[:ver] || options[:v]
+    version = package['latest_version'] if version.nil? || version == 'latest'
+    unless package['versions'].include?(version)
+      raise UnknownPackageVersionError.new(name, version)
+    end
+
+    protocol = options[:protocol] || options[:proto]
+    protocol = "#{protocol}:" unless protocol.nil?
+
+    URL_TEMPLATE % [protocol.to_s, name, version, package['filename']]
+  end
+
+  private
+
+  def packages
+    @packages ||= MultiJson.load(packages_json)
+  end
+
+  def packages_json
+    path = File.expand_path('../../data/packages.json', __FILE__)
+    File.open(path).read
+  end
+
+  extend self
+
+  class UnknownPackageError < ::Exception
+    def initialize name
+      super "Unknown package: #{name}"
+    end
+  end
+
+  class UnknownPackageVersionError < ::Exception
+    def initialize name, version
+      super "Unknown #{name} version: #{version}"
+    end
+  end
+end

lib/cdnjs_rails/railtie.rb

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+require 'cdnjs_rails/view_helpers'
+
+module CdnjsRails
+  class Railtie < Rails::Railtie
+    initializer 'cdnjs_rails.view_helpers' do |app|
+      ActionView::Base.send(:include, ViewHelpers)
+    end
+  end
+end

lib/cdnjs_rails/version.rb

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+module CdnjsRails
+  VERSION = '0.0.1'
+end

lib/cdnjs_rails/view_helpers.rb

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+module CdnjsRails
+  module ViewHelpers
+    def javascript_cdnjs_tag name, version = nil
+      javascript_include_tag CdnjsRails.package_url(name, version)
+    end
+
+    def stylesheet_cdnjs_tag name, version = nil
+      stylesheet_include_tag CdnjsRails.package_url(name, version)
+    end
+  end
+end