Module: Snails::Assets

Defined in:
lib/snails/app.rb

Overview

Then, in your view:

<script src=“/assets/js/app.js”></script> <link rel=“stylesheet” href=“/assets/css/styles.css” />

Defined Under Namespace

Modules: Tasks

Class Method Summary collapse

Class Method Details

.registered(app) ⇒ Object 



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# File 'lib/snails/app.rb', line 97

def self.registered(app)
  require 'sprockets-helpers'

  cwd = Pathname.new(Dir.pwd)
  app.set :sprockets, Sprockets::Environment.new(cwd)
  app.set :digest_assets, false
  app.set :assets_prefix, app.setting(:assets_prefix, '/assets') # URL
  app.set :assets_paths, app.setting(:assets_paths, %w(assets)) # source files
  app.set :assets_public_path, app.setting(:assets_public_path, cwd.join('public', 'assets')) # output dir
  app.set :assets_precompile, app.setting(:assets_precompile, %w(js/main.js css/main.css))
  app.set :assets_remove_digests, app.setting(:assets_remove_digests, false)

  app.configure do
    app.assets_paths.each do |path|
      app.sprockets.append_path cwd.join(path)
    end
  end

  app.configure :production, :staging do
    # app.sprockets.css_compressor = :sass
    # app.sprockets.js_compressor = :uglifier
  end

  app.configure :development, :test do
    # allow asset requests to pass
    if app.respond_to?(:allow_paths)
      app.allow_paths.push /^#{app.assets_prefix}(\/\w+)?\/([\w\.-]+)/
    end

    # and serve them
    app.get "#{app.assets_prefix}/*" do |path|
      env_sprockets = request.env.dup
      env_sprockets['PATH_INFO'] = path
      app.sprockets.call(env_sprockets)
    end
  end

  app.helpers do
    def asset_path(filename)
      file = manifest[filename] or raise "Not found in manifest: #{filename}"
      [settings.assets_prefix, file].join('/')
    end

    if Snails.env.production?
      def manifest
        @manifest ||= read_manifest
      end
    else
      def manifest
        read_manifest
      end
    end

    def read_manifest
      file = Dir[settings.assets_public_path + '/.*.json'].first or raise "No manifest found at #{path}"
      JSON.parse(IO.read(file))['assets']
    end
  end
end