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#!/usr/bin/env python
# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
import re
import sys
_HERE_PATH = os.path.join(os.path.dirname(__file__))
_SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..', '..'))
sys.path.append(os.path.join(_SRC_PATH, 'tools', 'grit'))
from grit.format import data_pack
def unpack(pak_path, out_path):
pak_dir = os.path.dirname(pak_path)
pak_id = os.path.splitext(os.path.basename(pak_path))[0]
data = data_pack.DataPack.ReadDataPack(pak_path)
# Associate numerical grit IDs to strings.
# For example 120045 -> 'IDR_SETTINGS_ABOUT_PAGE_HTML'
resource_ids = dict()
resources_path = os.path.join(pak_dir, 'grit', pak_id + '.h')
with open(resources_path) as resources_file:
for line in resources_file:
res = re.match('#define ([^ ]+) (\d+)', line)
if res:
resource_ids[int(res.group(2))] = res.group(1)
assert resource_ids
# Associate numerical string IDs to files.
resource_filenames = dict()
resources_map_path = os.path.join(pak_dir, 'grit', pak_id + '_map.cc')
with open(resources_map_path) as resources_map:
for line in resources_map:
res = re.match(' {"([^"]+)", ([^}]+)', line)
if res:
resource_filenames[res.group(2)] = res.group(1)
assert resource_filenames
# Extract packed files, while preserving directory structure.
for (resource_id, text) in data.resources.iteritems():
filename = resource_filenames[resource_ids[resource_id]]
dirname = os.path.join(out_path, os.path.dirname(filename))
if not os.path.exists(dirname):
os.makedirs(dirname)
with open(os.path.join(out_path, filename), 'w') as file:
file.write(text)
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