| #!/usr/bin/env python |
| """Downloads a prebuilt gn binary to a place where gn.py can find it.""" |
| |
| from __future__ import print_function |
| |
| import io |
| import os |
| try: |
| # In Python 3, we need the module urllib.reqest. In Python 2, this |
| # functionality was in the urllib2 module. |
| from urllib import request as urllib_request |
| except ImportError: |
| import urllib2 as urllib_request |
| import sys |
| import zipfile |
| |
| |
| def download_and_unpack(url, output_dir, gn): |
| """Download an archive from url and extract gn from it into output_dir.""" |
| print('downloading %s ...' % url, end='') |
| sys.stdout.flush() |
| data = urllib_request.urlopen(url).read() |
| print(' done') |
| zipfile.ZipFile(io.BytesIO(data)).extract(gn, path=output_dir) |
| |
| |
| def set_executable_bit(path): |
| mode = os.stat(path).st_mode |
| mode |= (mode & 0o444) >> 2 # Copy R bits to X. |
| os.chmod(path, mode) # No-op on Windows. |
| |
| |
| def get_platform(): |
| import platform |
| if sys.platform == 'darwin': |
| return 'mac-amd64' if platform.machine() != 'arm64' else 'mac-arm64' |
| if platform.machine() not in ('AMD64', 'x86_64'): |
| return None |
| if sys.platform.startswith('linux'): |
| return 'linux-amd64' |
| if sys.platform == 'win32': |
| return 'windows-amd64' |
| |
| |
| def main(): |
| platform = get_platform() |
| if not platform: |
| print('no prebuilt binary for', sys.platform) |
| print('build it yourself with:') |
| print(' rm -rf /tmp/gn &&') |
| print(' pushd /tmp && git clone https://gn.googlesource.com/gn &&') |
| print(' cd gn && build/gen.py && ninja -C out gn && popd &&') |
| print(' cp /tmp/gn/out/gn somewhere/on/PATH') |
| return 1 |
| dirname = os.path.join(os.path.dirname(__file__), 'bin', platform) |
| if not os.path.exists(dirname): |
| os.makedirs(dirname) |
| |
| url = 'https://chrome-infra-packages.appspot.com/dl/gn/gn/%s/+/latest' |
| gn = 'gn' + ('.exe' if sys.platform == 'win32' else '') |
| if platform == 'mac-arm64': # For https://openradar.appspot.com/FB8914243 |
| try: os.remove(os.path.join(dirname, gn)) |
| except OSError: pass |
| download_and_unpack(url % platform, dirname, gn) |
| set_executable_bit(os.path.join(dirname, gn)) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |