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#!/usr/bin/env python
# Copyright (C) 2015 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import print_function
import atexit
from distutils import spawn
import hashlib
import os
import shutil
import subprocess
import sys
import tarfile
import tempfile
def extract(path, outdir, bin):
if os.path.exists(os.path.join(outdir, bin)):
return # Another process finished extracting, ignore.
# Use a temp directory adjacent to outdir so shutil.move can use the same
# device atomically.
tmpdir = tempfile.mkdtemp(dir=os.path.dirname(outdir))
def cleanup():
try:
shutil.rmtree(tmpdir)
except OSError:
pass # Too late now
atexit.register(cleanup)
def extract_one(mem):
dest = os.path.join(outdir, mem.name)
tar.extract(mem, path=tmpdir)
try:
os.makedirs(os.path.dirname(dest))
except OSError:
pass # Either exists, or will fail on the next line.
shutil.move(os.path.join(tmpdir, mem.name), dest)
with tarfile.open(path, 'r:gz') as tar:
for mem in tar.getmembers():
if mem.name != bin:
extract_one(mem)
# Extract bin last so other processes only short circuit when extraction is
# finished.
extract_one(tar.getmember(bin))
def main(args):
path = args[0]
suffix = '.npm_binary.tgz'
tgz = os.path.basename(path)
parts = tgz[:-len(suffix)].split('@')
if not tgz.endswith(suffix) or len(parts) != 2:
print('usage: %s <path/to/npm_binary>' % sys.argv[0], file=sys.stderr)
return 1
name, _ = parts
# Avoid importing from gerrit because we don't want to depend on the right CWD.
sha1 = hashlib.sha1(open(path, 'rb').read()).hexdigest()
outdir = '%s-%s' % (path[:-len(suffix)], sha1)
rel_bin = os.path.join('package', 'bin', name)
bin = os.path.join(outdir, rel_bin)
if not os.path.isfile(bin):
extract(path, outdir, rel_bin)
nodejs = spawn.find_executable('nodejs')
if nodejs:
# Debian installs Node.js as 'nodejs', due to a conflict with another
# package.
subprocess.check_call([nodejs, bin] + args[1:])
else:
subprocess.check_call([bin] + args[1:])
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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