Add export_v8_tarball.py, a new tool to also export

standalone tarballs for V8.

This will be useful for Linux distributions packaging
shared library packages for V8.

BUG=none

Review URL: http://codereview.chromium.org/7600011

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@96099 0039d316-1c4b-4281-b951-d872f2087c98

tools/export_tarball/export_v8_tarball.py

+#!/usr/bin/python
+# Copyright (c) 2011 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 V8 sources, but without .svn directories.
+
+This allows easy packaging of V8, synchronized with browser releases.
+
+Example usage:
+
+export_v8_tarball.py /foo/bar
+
+The above will create file /foo/bar/v8-VERSION.tar.bz2 if it doesn't exist.
+"""
+
+import optparse
+import os
+import re
+import subprocess
+import sys
+import tarfile
+
+_V8_MAJOR_VERSION_PATTERN = re.compile(r'#define\s+MAJOR_VERSION\s+(.*)')
+_V8_MINOR_VERSION_PATTERN = re.compile(r'#define\s+MINOR_VERSION\s+(.*)')
+_V8_BUILD_NUMBER_PATTERN = re.compile(r'#define\s+BUILD_NUMBER\s+(.*)')
+_V8_PATCH_LEVEL_PATTERN = re.compile(r'#define\s+PATCH_LEVEL\s+(.*)')
+
+_V8_PATTERNS = [
+  _V8_MAJOR_VERSION_PATTERN,
+  _V8_MINOR_VERSION_PATTERN,
+  _V8_BUILD_NUMBER_PATTERN,
+  _V8_PATCH_LEVEL_PATTERN]
+
+def GetV8Version(v8_directory):
+  """
+  Returns version number as string based on the string
+  contents of version.cc file.
+  """
+  with open(os.path.join(v8_directory, 'src', 'version.cc')) as version_file:
+    version_contents = version_file.read()
+
+  version_components = []
+  for pattern in _V8_PATTERNS:
+    version_components.append(pattern.search(version_contents).group(1).strip())
+
+  if version_components[len(version_components) - 1] == '0':
+    version_components.pop()
+
+  return '.'.join(version_components)
+
+def GetSourceDirectory():
+  return os.path.realpath(
+    os.path.join(os.path.dirname(__file__), '..', '..', '..', 'src'))
+
+def GetV8Directory():
+  return os.path.join(GetSourceDirectory(), 'v8')
+
+# Workaround lack of the exclude parameter in add method in python-2.4.
+# TODO(phajdan.jr): remove the workaround when it's not needed on the bot.
+class MyTarFile(tarfile.TarFile):
+  def add(self, name, arcname=None, recursive=True, exclude=None):
+    head, tail = os.path.split(name)
+    if tail in ('.svn', '.git'):
+      return
+
+    tarfile.TarFile.add(self, name, arcname=arcname, recursive=recursive)
+
+def main(argv):
+  parser = optparse.OptionParser()
+  options, args = parser.parse_args(argv)
+
+  if len(args) != 1:
+    print 'You must provide only one argument: output file directory'
+    return 1
+
+  v8_directory = GetV8Directory()
+  if not os.path.exists(v8_directory):
+    print 'Cannot find the v8 directory.'
+    return 1
+
+  v8_version = GetV8Version(v8_directory)
+  print 'Packaging V8 version %s...' % v8_version
+  output_basename = 'v8-%s' % v8_version
+  output_fullname = os.path.join(args[0], output_basename + '.tar.bz2')
+
+  if os.path.exists(output_fullname):
+    print 'Already packaged, exiting.'
+    return 0
+
+  archive = MyTarFile.open(output_fullname, 'w:bz2')
+  try:
+    archive.add(v8_directory, arcname=output_basename)
+  finally:
+    archive.close()
+
+  return 0
+
+if __name__ == '__main__':
+  sys.exit(main(sys.argv[1:]))