make_sources

# File lib/rake/task_manager.rb, line 267
    def make_sources(task_name, extensions)
      result = extensions.collect { |ext|
        case ext
        when /%/
          task_name.pathmap(ext)
        when %{/}
          ext
        when /^\./
          task_name.ext(ext)
        when String
          ext
        when Proc
          if ext.arity == 1
            ext.call(task_name)
          else
            ext.call
          end
        else
          fail "Don't know how to handle rule dependent: #{ext.inspect}"
        end
      }
      result.flatten
    end