new_contents: #!/usr/bin/python
  # Copyright (c) 2009 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.
  
  """
  This tool creates a tarball with all the sources, but without .svn directories.
  
  It can also remove files which are not strictly required for build, so that
  the resulting tarball can be reasonably small (last time it was ~110 MB).
  
  Example usage (make sure gclient is in your PATH):
  
  export_tarball.py /foo/bar
  
  The above will create file /foo/bar.tar.bz2.
  """
  
  from __future__ import with_statement
  
  import contextlib
  import optparse
  import os
  import shutil
  import subprocess
  import sys
  import tarfile
  import tempfile
  
  def RunCommand(argv):
    """Runs the command with given argv and returns exit code."""
    try:
      proc = subprocess.Popen(argv, stdout=None)
    except OSError:
      return 1
    output = proc.communicate()[0]
    return proc.returncode
  
  def main(argv):
    parser = optparse.OptionParser()
    parser.add_option("--remove-nonessential-files",
                      dest="remove_nonessential_files",
                      action="store_true", default=False)
  
    options, args = parser.parse_args(argv)
  
    if len(args) != 1:
      print 'You must provide only one argument: output file name'
      print '(without .tar.bz2 extension).'
      return 1
  
    output_fullname = args[0] + '.tar.bz2'
    output_basename = os.path.basename(args[0])
    target_dir = tempfile.mkdtemp()
  
    try:
      if RunCommand(['gclient', 'export', target_dir]) != 0:
        print 'gclient failed'
        return 1
  
      if options.remove_nonessential_files:
        nonessential_dirs = (
            'src/chrome/test/data',
            'src/chrome/tools/test/reference_build',
            'src/gears/binaries',
            'src/net/data/cache_tests',
            'src/o3d/documentation',
            'src/o3d/samples',
            'src/third_party/lighttpd',
            'src/third_party/WebKit/LayoutTests',
            'src/webkit/data/layout_tests',
            'src/webkit/tools/test/reference_build',
        )
        for dir in nonessential_dirs:
          path = os.path.join(target_dir, dir)
          try:
            print 'removing %s...' % dir
            shutil.rmtree(path)
          except OSError, e:
            print 'error while trying to remove %s, skipping' % dir
  
      with contextlib.closing(tarfile.open(output_fullname, 'w:bz2')) as archive:
        archive.add(os.path.join(target_dir, 'src'), arcname=output_basename)
    finally:
      shutil.rmtree(target_dir)
  
    return 0
  
  if __name__ == "__main__":
    sys.exit(main(sys.argv[1:]))
  
subject: Add export_tarball tool.