class Rails::Command::RakeCommand

def non_app_file_pattern
  /\A(?!#{Regexp.quote Rails::Command.root.to_s})/
end

def perform(task, args, config)
  with_rake(task, *args) do |rake|
    if unrecognized_task = rake.top_level_tasks.find { |task| !rake.lookup(task[/[^\[]+/]) }
      @rake_tasks = rake.tasks
      raise UnrecognizedCommandError.new(unrecognized_task)
    end
    rake.options.suppress_backtrace_pattern = non_app_file_pattern
    rake.standard_exception_handling { rake.top_level }
  end
end

def printing_commands
  rake_tasks.filter_map do |task|
    if task.comment && task.locations.any?(non_app_file_pattern)
      [task.name_with_args, task.comment]
    end
  end
end

def rake_tasks
  @rake_tasks ||= with_rake(&:tasks)
end

def with_rake(*args, &block)
  require "rake"
  Rake::TaskManager.record_task_metadata = true
  result = nil
  Rake.with_application do |rake|
    rake.init(bin, args) unless args.empty?
    rake.load_rakefile
    result = block.call(rake)
  end
  result
end