module ActionView::PathRegistry

def self.all_file_system_resolvers
  @file_system_resolvers.values
end

def self.all_resolvers
  resolvers = [all_file_system_resolvers]
  resolvers.concat @view_paths_by_class.values.map(&:to_a)
  resolvers.flatten.uniq
end

def self.cast_file_system_resolvers(paths)
  paths = Array(paths)
  @file_system_resolver_mutex.synchronize do
    built_resolver = false
    paths = paths.map do |path|
      case path
      when String, Pathname
        path = File.expand_path(path)
        @file_system_resolvers[path] ||=
          begin
            built_resolver = true
            FileSystemResolver.new(path)
          end
      else
        path
      end
    end
    file_system_resolver_hooks.each(&:call) if built_resolver
  end
  paths
end

def self.get_view_paths(klass)
  @view_paths_by_class[klass] || get_view_paths(klass.superclass)
end

def self.set_view_paths(klass, paths)
  @view_paths_by_class[klass] = paths
end