# Hookin -- minimalist Ruby package manager

# Copyright (C) 2008 Christian Neukirchen <purl.org/net/chneukirchen>
#
# Hookin is freely distributable under the terms of an MIT-style license.
# See COPYING or http://www.opensource.org/licenses/mit-license.php.

$HOOKIN_DB = nil
$HOOKIN_FILE = nil

def __hookin_require(lib)
  unless $HOOKIN_DB
    begin
      $HOOKIN_FILE = [ENV["HOOKINDB"],
                      "hookin.db",
                      File.expand_path("~/.hookin.db"),
                      *$LOAD_PATH.map { |path| File.join(path, "hookin.db") }
                     ].find { |f| f && File.exist?(f) }
      $HOOKIN_FILE ||= File.expand_path("~/.hookin.db")
      File.open($HOOKIN_FILE) { |db| $HOOKIN_DB = Marshal.load(db) }
    rescue Errno::ENOENT
      $HOOKIN_DB = {}
    end
  end

  if record = $HOOKIN_DB[lib]
    __pre_hookin_require "#{record[0]}/#{lib}"
  else
    __pre_hookin_require lib
  end
end

module Kernel
  alias __pre_hookin_require require
  alias require __hookin_require
end