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#!/usr/bin/python
# Copyright (c) 2006-2008 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.
# chromium_extension.py
import array
import hashlib
import logging
import optparse
import os
import re
import shutil
import sys
import zipfile
if sys.version_info < (2, 6):
import simplejson as json
else:
import json
ignore_dirs = [".svn", "CVS"]
ignore_files = [re.compile(".*~")]
MANIFEST_FILENAME = "manifest.json"
class ExtensionDir:
def __init__(self, path):
self._root = os.path.abspath(path)
self._dirs = []
self._files = []
for root, dirs, files in os.walk(path, topdown=True):
for dir in ignore_dirs:
if dir in dirs:
dirs.remove(dir)
root = os.path.abspath(root)
for dir in dirs:
self._dirs.append(os.path.join(root, dir))
for f in files:
for match in ignore_files:
if not match.match(f):
self._files.append(os.path.join(root, f))
def validate(self):
if os.path.join(self._root, MANIFEST_FILENAME) not in self._files:
logging.error("package is missing a valid %s file" % MANIFEST_FILENAME)
return False
return True
def writeToPackage(self, path):
if not self.validate():
return False
try:
f = open(os.path.join(self._root, MANIFEST_FILENAME))
manifest = json.load(f)
f.close()
zip_path = path + ".zip"
if os.path.exists(zip_path):
os.remove(zip_path)
zip = zipfile.ZipFile(zip_path, "w")
(root, dir) = os.path.split(self._root)
root_len = len(self._root)
for file in self._files:
arcname = file[root_len+1:]
logging.debug("%s: %s" % (arcname, file))
zip.write(file, arcname)
zip.close()
zip = open(zip_path, mode="rb")
hash = hashlib.sha256()
while True:
buf = zip.read(32 * 1024)
if not len(buf):
break
hash.update(buf)
zip.close()
manifest["zip_hash"] = hash.hexdigest()
# This is a bit odd - we're actually appending a new zip file to the end
# of the manifest. Believe it or not, this is actually an explicit
# feature of the zip format, and many zip utilities (this library
# and three others I tried) can still read the underlying zip file.
if os.path.exists(path):
os.remove(path)
out = open(path, "wb")
out.write("Cr24") # Extension file magic number
# The rest of the header is currently made up of three ints:
# version, header size, manifest size
header = array.array("l")
header.append(1) # version
header.append(16) # header size
manifest_json = json.dumps(manifest);
header.append(len(manifest_json)) # manifest size
header.tofile(out)
out.write(manifest_json);
zip = open(zip_path, "rb")
while True:
buf = zip.read(32 * 1024)
if not len(buf):
break
out.write(buf)
zip.close()
out.close()
os.remove(zip_path)
logging.info("created extension package %s" % path)
except IOError, (errno, strerror):
logging.error("error creating extension %s (%d, %s)" % (path, errno,
strerror))
try:
if os.path.exists(path):
os.remove(path)
except:
pass
return False
return True
class ExtensionPackage:
def __init__(self, path):
zip = zipfile.ZipFile(path)
error = zip.testzip()
if error:
logging.error("error reading extension: %s", error)
return
logging.info("%s contents:" % path)
files = zip.namelist()
for f in files:
logging.info(f)
def Run():
logging.basicConfig(level=logging.INFO, format="[%(levelname)s] %(message)s")
parser = optparse.OptionParser("usage: %prog --indir=<dir> --outfile=<file>")
parser.add_option("", "--indir",
help="an input directory where the extension lives")
parser.add_option("", "--outfile",
help="extension package filename to create")
(options, args) = parser.parse_args()
if not options.indir:
parser.error("missing required option --indir")
if not options.outfile:
parser.error("missing required option --outfile")
ext = ExtensionDir(options.indir)
ext.writeToPackage(options.outfile)
pkg = ExtensionPackage(options.outfile)
return 0
if __name__ == "__main__":
retcode = Run()
sys.exit(retcode)
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