vendor/rails/railties/lib/rails/rack/metal.rb

   1 require 'active_support/ordered_hash'
   2
   3 module Rails
   4   module Rack
   5     class Metal
   6       NotFoundResponse = [404, {}, []].freeze
   7       NotFound = lambda { NotFoundResponse }
   8
   9       cattr_accessor :metal_paths
  10       self.metal_paths = ["#{Rails.root}/app/metal"]
  11       cattr_accessor :requested_metals
  12
  13       def self.metals
  14         matcher = /#{Regexp.escape('/app/metal/')}(.*)\.rb\Z/
  15         metal_glob = metal_paths.map{ |base| "#{base}/**/*.rb" }
  16         all_metals = {}
  17
  18         metal_glob.each do |glob|
  19           Dir[glob].sort.map do |file|
  20             file = file.match(matcher)[1]
  21             all_metals[file.camelize] = file
  22           end
  23         end
  24
  25         load_list = requested_metals || all_metals.keys
  26
  27         load_list.map do |requested_metal|
  28           if metal = all_metals[requested_metal]
  29             require metal
  30             requested_metal.constantize
  31           end
  32         end.compact
  33       end
  34
  35       def initialize(app)
  36         @app = app
  37         @metals = ActiveSupport::OrderedHash.new
  38         self.class.metals.each { |app| @metals[app] = true }
  39         freeze
  40       end
  41
  42       def call(env)
  43         @metals.keys.each do |app|
  44           result = app.call(env)
  45           return result unless result[0].to_i == 404
  46         end
  47         @app.call(env)
  48       end
  49     end
  50   end
  51 end