native_client_sdk/src/build_tools/build_version.py

   1 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 """Small utility library of python functions used during SDK building.
   6 """
   7
   8 import os
   9 import re
  10 import sys
  11
  12 # pylint: disable=E0602
  13
  14 # Reuse last change utility code.
  15 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  16 SRC_DIR = os.path.dirname(os.path.dirname(os.path.dirname(SCRIPT_DIR)))
  17 sys.path.append(os.path.join(SRC_DIR, 'build/util'))
  18 import lastchange
  19
  20
  21 # Location of chrome's version file.
  22 VERSION_PATH = os.path.join(SRC_DIR, 'chrome', 'VERSION')
  23
  24
  25 def ChromeVersion():
  26   '''Extract chrome version from src/chrome/VERSION + svn.
  27
  28   Returns:
  29     Chrome version string or trunk + svn rev.
  30   '''
  31   info = FetchVersionInfo()
  32   if info.url == 'refs/heads/master':
  33     return 'trunk.%s' % info.revision
  34   else:
  35     return ChromeVersionNoTrunk()
  36
  37
  38 def ChromeVersionNoTrunk():
  39   '''Extract the chrome version from src/chrome/VERSION.
  40   Ignore whether this is a trunk build.
  41
  42   Returns:
  43     Chrome version string.
  44   '''
  45   exec(open(VERSION_PATH).read())
  46   return '%s.%s.%s.%s' % (MAJOR, MINOR, BUILD, PATCH)
  47
  48
  49 def ChromeMajorVersion():
  50   '''Extract chrome major version from src/chrome/VERSION.
  51
  52   Returns:
  53     Chrome major version.
  54   '''
  55   exec(open(VERSION_PATH, 'r').read())
  56   return str(MAJOR)
  57
  58
  59 def ChromeRevision():
  60   '''Extract chrome revision from svn.
  61
  62      Now that the Chrome source-of-truth is git, this will return the
  63      Cr-Commit-Position instead. fortunately, this value is equal to the SVN
  64      revision if one exists.
  65
  66   Returns:
  67     The Chrome revision as a string. e.g. "12345"
  68   '''
  69   return FetchVersionInfo().revision
  70
  71
  72 def NaClRevision():
  73   '''Extract NaCl revision from svn.
  74
  75   Returns:
  76     The NaCl revision as a string. e.g. "12345"
  77   '''
  78   nacl_dir = os.path.join(SRC_DIR, 'native_client')
  79   return FetchVersionInfo(nacl_dir, 'native_client').revision
  80
  81
  82 def FetchVersionInfo(directory=None,
  83                      directory_regex_prior_to_src_url='chrome|blink|svn'):
  84   """
  85   Returns the last change (in the form of a branch, revision tuple),
  86   from some appropriate revision control system.
  87
  88   TODO(binji): This is copied from lastchange.py. Remove this function and use
  89   lastchange.py directly when the dust settles. (see crbug.com/406783)
  90   """
  91   svn_url_regex = re.compile(
  92       r'.*/(' + directory_regex_prior_to_src_url + r')(/.*)')
  93
  94   version_info = (lastchange.FetchSVNRevision(directory, svn_url_regex) or
  95                   lastchange.FetchGitSVNRevision(directory, svn_url_regex) or
  96                   FetchGitCommitPosition(directory))
  97   if not version_info:
  98     version_info = lastchange.VersionInfo(None, None)
  99   return version_info
 100
 101
 102 def FetchGitCommitPosition(directory=None):
 103   """
 104   Return the "commit-position" of the Chromium git repo. This should be
 105   equivalent to the SVN revision if one eixsts.
 106
 107   This is a copy of the (recently reverted) change in lastchange.py.
 108   TODO(binji): Move this logic to lastchange.py when the dust settles.
 109   (see crbug.com/406783)
 110   """
 111   proc = lastchange.RunGitCommand(directory,
 112                                   ['show', '-s', '--format=%B', 'HEAD'])
 113   if proc:
 114     output = proc.communicate()[0]
 115     if proc.returncode == 0 and output:
 116       for line in reversed(output.splitlines()):
 117         match = re.search('Cr-Commit-Position: (.*)@{#(\d+)}', line)
 118         if match:
 119           return lastchange.VersionInfo(match.group(1), match.group(2))
 120   return lastchange.VersionInfo(None, None)