#!/usr/bin/env python

# Copyright 2018 The Crashpad Authors. All rights reserved.
#
# 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.

# Various code adapted from:
# https://cs.chromium.org/chromium/src/build/linux/sysroot_scripts/install-sysroot.py

import os
import shutil
import subprocess
import sys
import urllib2


SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))

# Sysroot revision from:
# https://cs.chromium.org/chromium/src/build/linux/sysroot_scripts/sysroots.json
SERVER = 'https://commondatastorage.googleapis.com'
PATH = 'chrome-linux-sysroot/toolchain'
REVISION = '3c248ba4290a5ad07085b7af07e6785bf1ae5b66'
FILENAME = 'debian_stretch_amd64_sysroot.tar.xz'

def main():
  url = '%s/%s/%s/%s' % (SERVER, PATH, REVISION, FILENAME)

  sysroot = os.path.join(SCRIPT_DIR, os.pardir,
                         'third_party', 'linux', 'sysroot')

  stamp = os.path.join(sysroot, '.stamp')
  if os.path.exists(stamp):
    with open(stamp) as s:
      if s.read() == url:
        return

  print 'Installing Debian root image from %s' % url

  if os.path.isdir(sysroot):
    shutil.rmtree(sysroot)
  os.mkdir(sysroot)
  tarball = os.path.join(sysroot, FILENAME)
  print 'Downloading %s' % url

  for _ in range(3):
    response = urllib2.urlopen(url)
    with open(tarball, 'wb') as f:
      f.write(response.read())
    break
  else:
    raise Exception('Failed to download %s' % url)

  subprocess.check_call(['tar', 'xf', tarball, '-C', sysroot])

  os.remove(tarball)

  with open(stamp, 'w') as s:
    s.write(url)


if __name__ == '__main__':
  main()
  sys.exit(0)