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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 argparse
import os
import re
import sys
_HERE_PATH = os.path.join(os.path.dirname(__file__))
# The name of a dummy file to be updated always after all other files have been
# written. This file is declared as the "output" for GN's purposes
_TIMESTAMP_FILENAME = os.path.join('unpack.stamp')
_SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..', '..'))
sys.path.insert(1, os.path.join(_SRC_PATH, 'tools', 'grit'))
from grit.format import data_pack
def ParseLine(line):
return re.match(' {"([^"]+)", ([^},]+)', line)
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.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 = ParseLine(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)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--pak_file')
parser.add_argument('--out_folder')
args = parser.parse_args()
Unpack(args.pak_file, args.out_folder)
timestamp_file_path = os.path.join(args.out_folder, _TIMESTAMP_FILENAME)
with open(timestamp_file_path, 'a'):
os.utime(timestamp_file_path, None)
if __name__ == '__main__':
main()
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