require "action_view" module Sprockets module Helpers module RailsHelper extend ActiveSupport::Concern include ActionView::Helpers::AssetTagHelper def asset_paths @asset_paths ||= begin paths = RailsHelper::AssetPaths.new(config, controller) paths.asset_environment = asset_environment paths.asset_digests = asset_digests paths.compile_assets = compile_assets? paths.digest_assets = digest_assets? paths end end def javascript_include_tag(*sources) options = sources.extract_options! debug = options.key?(:debug) ? options.delete(:debug) : debug_assets? body = options.key?(:body) ? options.delete(:body) : false digest = options.key?(:digest) ? options.delete(:digest) : digest_assets? sources.collect do |source| if debug && asset = asset_paths.asset_for(source, 'js') asset.to_a.map { |dep| super(dep.pathname.to_s, { :src => path_to_asset(dep, :ext => 'js', :body => true, :digest => digest) }.merge!(options)) } else super(source.to_s, { :src => path_to_asset(source, :ext => 'js', :body => body, :digest => digest) }.merge!(options)) end end.join("\n").html_safe end def stylesheet_link_tag(*sources) options = sources.extract_options! debug = options.key?(:debug) ? options.delete(:debug) : debug_assets? body = options.key?(:body) ? options.delete(:body) : false digest = options.key?(:digest) ? options.delete(:digest) : digest_assets? sources.collect do |source| if debug && asset = asset_paths.asset_for(source, 'css') asset.to_a.map { |dep| super(dep.pathname.to_s, { :href => path_to_asset(dep, :ext => 'css', :body => true, :protocol => :request, :digest => digest) }.merge!(options)) } else super(source.to_s, { :href => path_to_asset(source, :ext => 'css', :body => body, :protocol => :request, :digest => digest) }.merge!(options)) end end.join("\n").html_safe end def asset_path(source, options = {}) source = source.logical_path if source.respond_to?(:logical_path) path = asset_paths.compute_public_path(source, asset_prefix, options.merge(:body => true)) options[:body] ? "#{path}?body=1" : path end alias_method :path_to_asset, :asset_path # aliased to avoid conflicts with an asset_path named route def image_path(source) path_to_asset(source) end alias_method :path_to_image, :image_path # aliased to avoid conflicts with an image_path named route def javascript_path(source) path_to_asset(source) end alias_method :path_to_javascript, :javascript_path # aliased to avoid conflicts with an javascript_path named route def stylesheet_path(source) path_to_asset(source) end alias_method :path_to_stylesheet, :stylesheet_path # aliased to avoid conflicts with an stylesheet_path named route private def debug_assets? compile_assets? && (Rails.application.config.assets.debug || params[:debug_assets]) rescue NoMethodError false end # Override to specify an alternative prefix for asset path generation. # When combined with a custom +asset_environment+, this can be used to # implement themes that can take advantage of the asset pipeline. # # If you only want to change where the assets are mounted, refer to # +config.assets.prefix+ instead. def asset_prefix Rails.application.config.assets.prefix end def asset_digests Rails.application.config.assets.digests end def compile_assets? Rails.application.config.assets.compile end def digest_assets? Rails.application.config.assets.digest end # Override to specify an alternative asset environment for asset # path generation. The environment should already have been mounted # at the prefix returned by +asset_prefix+. def asset_environment Rails.application.assets end class AssetPaths < ::ActionView::AssetPaths #:nodoc: attr_accessor :asset_environment, :asset_prefix, :asset_digests, :compile_assets, :digest_assets class AssetNotPrecompiledError < StandardError; end def asset_for(source, ext) source = source.to_s return nil if is_uri?(source) source = rewrite_extension(source, nil, ext) asset_environment[source] rescue Sprockets::FileOutsidePaths nil end def digest_for(logical_path) if digest_assets && asset_digests && (digest = asset_digests[logical_path]) return digest end if compile_assets if digest_assets && asset = asset_environment[logical_path] return asset.digest_path end return logical_path else raise AssetNotPrecompiledError.new("#{logical_path} isn't precompiled") end end def rewrite_asset_path(source, dir, options = {}) if source[0] == ?/ source else source = digest_for(source) unless options[:digest] == false source = File.join(dir, source) source = "/#{source}" unless source =~ /^\// source end end def rewrite_extension(source, dir, ext) if ext && File.extname(source) != ".#{ext}" "#{source}.#{ext}" else source end end end end end end