eval使わないなら、こんな感じ？

配列が頑張るなら、こんな感じ？

      [target_dir].
        select_recent.
        reverse[0..7].
        delete_current_file.
        collect_view_paths.
        open_menu

微妙かなw

require File.dirname(__FILE__) + '/open_from_menu'

include Mate::OpenFromMenu
module Mate
  module OpenRecent
    def open_recent(target_dir = ENV["TM_PROJECT_DIRECTORY"])
      [target_dir].
        select_recent.
        reverse[0..7].
        delete_current_file.
        collect_view_paths.
        open_menu
    end
  end
end

class Array
  include Mate::OpenFromMenu
  def select_recent
    root = self[0]
    root = ENV["HOME"] if root == nil
    Dir.glob("#{ root }/**/*.*").sort_by { |f| 
      File.mtime(f)
    }
  end

  def delete_current_file
    self.select { |e| e != ENV["TM_SELECTED_FILE"] }
  end

  def collect_view_paths
    self.collect { |e|
      dir_base = File.split(e)
      [dir_base[1], e]
    }
  end
  
  def open_menu
    open_from_menu(self)
  end
end

__END__

#!/usr/bin/env ruby
require ENV['TM_BUNDLE_SUPPORT'] + "/lib/mate/open_recent"
include Mate::OpenRecent
open_recent