module Roda::RodaPlugins::PathRewriter::RequestMethods

def initialize(scope, env)

Rewrite remaining_path and/or PATH_INFO based on the path rewrites. 
def initialize(scope, env)
  path_info = env['PATH_INFO']
  rewrite_path(scope.class.opts[:path_info_rewrites], path_info)
  super
  remaining_path = @remaining_path = @remaining_path.dup
  rewrite_path(scope.class.opts[:remaining_path_rewrites], remaining_path)
end

def rewrite_path(replacements, path)

Rewrite the given path using the given replacements. 
def rewrite_path(replacements, path)
  replacements.each do |was, is|
    if is.is_a?(Proc)
      path.sub!(was){is.call($~)}
    else
      path.sub!(was, is)
    end
  end
end