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#!/usr/bin/env 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.
"""
version.py -- Chromium version string substitution utility.
"""
import getopt
import os
import re
import subprocess
import sys
class Usage(Exception):
def __init__(self, msg):
self.msg = msg
def svn_fetch_revision():
"""
Fetch the Subversion revision for the local tree.
Errors are swallowed.
"""
try:
p = subprocess.Popen(['svn', 'info'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except OSError:
# 'svn' is apparently either not installed or not executable.
return None
revision = None
if p:
svn_re = re.compile('^Revision:\s+(\S+)$', re.M)
m = svn_re.search(p.stdout.read())
if m:
revision = m.group(1)
return revision
def git_fetch_id():
"""
Fetch the GIT identifier for the local tree.
Errors are swallowed.
"""
try:
p = subprocess.Popen(['git', 'log', '-1'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
except OSError:
# 'git' is apparently either not installed or not executable.
return None
id = None
if p:
git_re = re.compile('^\s*git-svn-id:\s+(\S+)@(\d+)', re.M)
m = git_re.search(p.stdout.read())
if m:
id = m.group(1)
return id
def fetch_values_from_file(values_dict, file_name):
"""
Fetches KEYWORD=VALUE settings from the specified file.
Everything to the left of the first '=' is the keyword,
everything to the right is the value. No stripping of
white space, so beware.
The file must exist, otherwise you get the Python exception from open().
"""
for line in open(file_name, 'r').readlines():
key, val = line.rstrip('\r\n').split('=', 1)
values_dict[key] = val
def fetch_values(file_list):
"""
Returns a dictionary of values to be used for substitution, populating
the dictionary with KEYWORD=VALUE settings from the files in 'file_list'.
Explicitly adds the following values from internal calculations:
LASTCHANGE (the SVN revision, or GIT id of the local tree)
OFFICIAL_BUILD
"""
change = svn_fetch_revision()
if not change and sys.platform in ('linux2',):
change = git_fetch_id()
if not change:
change = '0'
CHROME_BUILD_TYPE = os.environ.get('CHROME_BUILD_TYPE')
if CHROME_BUILD_TYPE == '_official':
official_build = '1'
else:
official_build = '0'
values = dict(
LASTCHANGE = change,
OFFICIAL_BUILD = official_build,
)
for file_name in file_list:
fetch_values_from_file(values, file_name)
return values
def subst_contents(file_name, values):
"""
Returns the contents of the specified file_name with substited
values from the specified dictionary.
Keywords to be substituted are surrounded by '@': @KEYWORD@.
No attempt is made to avoid recursive substitution. The order
of evaluation is random based on the order of the keywords returned
by the Python dictionary. So do NOT substitute a value that
contains any @KEYWORD@ strings expecting them to be recursively
substituted, okay?
"""
contents = open(file_name, 'r').read()
for key, val in values.items():
try:
contents = contents.replace('@' + key + '@', val)
except TypeError:
print repr(key), repr(val)
return contents
def write_if_changed(file_name, contents):
"""
Writes the specified contents to the specified file_name
iff the contents are different than the current contents.
"""
try:
old_contents = open(file_name, 'r').read()
except EnvironmentError:
pass
else:
if contents == old_contents:
return
os.unlink(file_name)
open(file_name, 'w').write(contents)
def main(argv=None):
if argv is None:
argv = sys.argv
short_options = 'f:i:o:h'
long_options = ['file=', 'help']
helpstr = """\
Usage: version.py [-h] [-f FILE] [[-i] FILE] [[-o] FILE]
-f FILE, --file=FILE Read variables from FILE.
-i FILE, --input=FILE Read strings to substitute from FILE.
-o FILE, --output=FILE Write substituted strings to FILE.
-h, --help Print this help and exit.
"""
variable_files = []
in_file = None
out_file = None
try:
try:
opts, args = getopt.getopt(argv[1:], short_options, long_options)
except getopt.error, msg:
raise Usage(msg)
for o, a in opts:
if o in ('-f', '--file'):
variable_files.append(a)
elif o in ('-i', '--input'):
in_file = a
elif o in ('-o', '--output'):
out_file = a
elif o in ('-h', '--help'):
print helpstr
return 0
while len(args) and (in_file is None or out_file is None):
if in_file is None:
in_file = args.pop(0)
elif out_file is None:
out_file = args.pop(0)
if args:
msg = 'Unexpected arguments: %r' % args
raise Usage(msg)
except Usage, err:
sys.stderr.write(err.msg)
sys.stderr.write('Use -h to get help.')
return 2
values = fetch_values(variable_files)
if in_file:
contents = subst_contents(in_file, values)
else:
# Generate a default set of version information.
contents = """MAJOR=%(MAJOR)s
MINOR=%(MINOR)s
BUILD=%(BUILD)s
PATCH=%(PATCH)s
LASTCHANGE=%(LASTCHANGE)s
OFFICIAL_BUILD=%(OFFICIAL_BUILD)s
""" % values
if out_file:
write_if_changed(out_file, contents)
else:
print contents
return 0
if __name__ == '__main__':
sys.exit(main())
|
