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# Copyright (c) 2012 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.
"""Small utility library of python functions used during SDK building.
"""
import os
import re
import sys
# pylint: disable=E0602
# Reuse last change utility code.
SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
SRC_DIR = os.path.dirname(os.path.dirname(os.path.dirname(SCRIPT_DIR)))
sys.path.append(os.path.join(SRC_DIR, 'build/util'))
import lastchange
# Location of chrome's version file.
VERSION_PATH = os.path.join(SRC_DIR, 'chrome', 'VERSION')
def ChromeVersion():
'''Extract chrome version from src/chrome/VERSION + svn.
Returns:
Chrome version string or trunk + svn rev.
'''
info = FetchGitCommitPosition()
if info.url == 'git':
_, ref, revision = ParseCommitPosition(info.revision)
if ref == 'refs/heads/master':
return 'trunk.%s' % revision
return ChromeVersionNoTrunk()
def ChromeVersionNoTrunk():
'''Extract the chrome version from src/chrome/VERSION.
Ignore whether this is a trunk build.
Returns:
Chrome version string.
'''
exec(open(VERSION_PATH).read())
return '%s.%s.%s.%s' % (MAJOR, MINOR, BUILD, PATCH)
def ChromeMajorVersion():
'''Extract chrome major version from src/chrome/VERSION.
Returns:
Chrome major version.
'''
exec(open(VERSION_PATH, 'r').read())
return str(MAJOR)
def ChromeRevision():
'''Extract chrome revision from svn.
Now that the Chrome source-of-truth is git, this will return the
Cr-Commit-Position instead. Fortunately, this value is equal to the SVN
revision if one exists.
Returns:
The Chrome revision as a string. e.g. "12345"
'''
version = FetchGitCommitPosition()
return ParseCommitPosition(version.revision)[2]
def ChromeCommitPosition():
'''Return the full git sha and commit position.
Returns:
A value like:
0178d4831bd36b5fb9ff477f03dc43b11626a6dc-refs/heads/master@{#292238}
'''
return FetchGitCommitPosition().revision
def NaClRevision():
'''Extract NaCl revision from svn.
Returns:
The NaCl revision as a string. e.g. "12345"
'''
nacl_dir = os.path.join(SRC_DIR, 'native_client')
return lastchange.FetchVersionInfo(None, nacl_dir, 'native_client').revision
def FetchGitCommitPosition(directory=None):
'''Return the "commit-position" of the Chromium git repo. This should be
equivalent to the SVN revision if one exists.
'''
SEARCH_LIMIT = 100
for i in xrange(SEARCH_LIMIT):
cmd = ['show', '-s', '--format=%H%n%B', 'HEAD~%d' % i]
proc = lastchange.RunGitCommand(directory, cmd)
if not proc:
break
output = proc.communicate()[0]
if not (proc.returncode == 0 and output):
break
lines = output.splitlines()
# First line is the hash.
hsh = lines[0]
if not re.match(r'[0-9a-fA-F]+', hsh):
break
for line in reversed(lines):
if line.startswith('Cr-Commit-Position:'):
pos = line.rsplit()[-1].strip()
return lastchange.VersionInfo('git', '%s-%s' % (hsh, pos))
raise Exception('Unable to fetch a Git Commit Position.')
def ParseCommitPosition(commit_position):
'''Parse a Chrome commit position into its components.
Given a commit position like:
0178d4831bd36b5fb9ff477f03dc43b11626a6dc-refs/heads/master@{#292238}
Returns:
("0178d4831bd36b5fb9ff477f03dc43b11626a6dc", "refs/heads/master", "292238")
'''
m = re.match(r'([0-9a-fA-F]+)(?:-([^@]+)@{#(\d+)})?', commit_position)
if m:
return m.groups()
return None
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