text: #!/usr/bin/env python
  
  import argparse
  import glob
  import os
  import platform
  import subprocess
  import sys
  
  import lib.git as git
  
  from lib.config import PLATFORM_KEY
  
  SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
  BOTO_DIR = os.path.join(SOURCE_ROOT, 'vendor', 'boto')
  
  def main():
    args = parse_args()
  
    try:
      upload(args)
    except AssertionError as e:
      return e.message
  
  
  def parse_args():
    parser = argparse.ArgumentParser(description='Upload distribution')
    parser.add_argument('-t', '--target_arch', default='x64', help='x64 or ia32')
    parser.add_argument('--upload_packaged_src', action='store_true',
                        help='Upload packaged source to s3')
    parser.add_argument('--chromium_version',
                        help='Chromium version for uploading packaged source to s3')
    return parser.parse_args()
  
  
  def upload(args):
    os.chdir(SOURCE_ROOT)
    bucket, access_key, secret_key = s3_config()
    commit = git.get_head_commit(SOURCE_ROOT)
  
    if os.environ.has_key('MAS_BUILD'):
      platform = 'mas'
    else:
      platform = PLATFORM_KEY
  
    if args.upload_packaged_src:
      upload_files = ['src.tar.bz2']
      s3put(bucket, access_key, secret_key, SOURCE_ROOT,
            'libchromiumcontent/{0}/src/{1}'.format(PLATFORM_KEY, args.chromium_version),
            upload_files)
    else:
      upload_files = glob.glob('libchromiumcontent*.tar.bz2') + glob.glob('native-mksnapshot.tar.bz2')
      s3put(bucket, access_key, secret_key, SOURCE_ROOT,
            'libchromiumcontent/{0}/{1}/{2}'.format(platform, args.target_arch, commit),
            upload_files)
  
  
  def s3_config():
    config = (os.environ.get('LIBCHROMIUMCONTENT_S3_BUCKET', ''),
              os.environ.get('LIBCHROMIUMCONTENT_S3_ACCESS_KEY', ''),
              os.environ.get('LIBCHROMIUMCONTENT_S3_SECRET_KEY', ''))
    message = ('Error: Please set the $LIBCHROMIUMCONTENT_S3_BUCKET, '
               '$LIBCHROMIUMCONTENT_S3_ACCESS_KEY, and '
               '$LIBCHROMIUMCONTENT_S3_SECRET_KEY environment variables')
    assert all(len(c) for c in config), message
    return config
  
  
  def boto_path_dirs():
    return [
      os.path.join(BOTO_DIR, 'build', 'lib'),
      os.path.join(BOTO_DIR, 'build', 'lib.linux-x86_64-2.7')
    ]
  
  
  def run_boto_script(access_key, secret_key, script_name, *args):
    env = os.environ.copy()
    env['AWS_ACCESS_KEY_ID'] = access_key
    env['AWS_SECRET_ACCESS_KEY'] = secret_key
    env['PYTHONPATH'] = os.path.pathsep.join(
        [env.get('PYTHONPATH', '')] + boto_path_dirs())
  
    boto = os.path.join(BOTO_DIR, 'bin', script_name)
    subprocess.check_call([sys.executable, boto] + list(args), env=env)
  
  
  def s3put(bucket, access_key, secret_key, prefix, key_prefix, files):
    args = [
      '--bucket', bucket,
      '--prefix', prefix,
      '--key_prefix', key_prefix,
      '--multipart',
      '--grant', 'public-read'
    ] + files
  
    run_boto_script(access_key, secret_key, 's3put', *args)
  
  
  if __name__ == '__main__':
    sys.exit(main())
  