Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/version.py @ 5197:55860a45bbf2
Enable demandimport only in scripts, not in importable modules (issue605)
This way other applications can choose if and when they want this feature,
because it might be problematic if those applications rely on ImportError.
author | Thomas Arendsen Hein <thomas@intevation.de> |
---|---|
date | Sat, 18 Aug 2007 11:37:08 +0200 |
parents | cff3e4b4a8de |
children |
line wrap: on
line source
# Copyright (C) 2005, 2006 by Intevation GmbH # Author(s): # Thomas Arendsen Hein <thomas@intevation.de> # # This program is free software under the GNU GPL (>=v2) # Read the file COPYING coming with the software for details. """ Mercurial version """ import os import os.path import re import time import util unknown_version = 'unknown' remembered_version = False def get_version(doreload=False): """Return version information if available.""" try: import mercurial.__version__ if doreload: reload(mercurial.__version__) version = mercurial.__version__.version except ImportError: version = unknown_version return version def write_version(version): """Overwrite version file.""" if version == get_version(): return directory = os.path.dirname(__file__) for suffix in ['py', 'pyc', 'pyo']: try: os.unlink(os.path.join(directory, '__version__.%s' % suffix)) except OSError: pass f = open(os.path.join(directory, '__version__.py'), 'w') f.write("# This file is auto-generated.\n") f.write("version = %r\n" % version) f.close() # reload the file we've just written get_version(True) def remember_version(version=None): """Store version information.""" global remembered_version if not version and os.path.isdir(".hg"): f = os.popen("hg identify 2> %s" % util.nulldev) # use real hg installation ident = f.read()[:-1] if not f.close() and ident: ids = ident.split(' ', 1) version = ids.pop(0) if version[-1] == '+': version = version[:-1] modified = True else: modified = False if version.isalnum() and ids: for tag in ids[0].split('/'): # is a tag is suitable as a version number? if re.match(r'^(\d+\.)+[\w.-]+$', tag): version = tag break if modified: version += time.strftime('+%Y%m%d') if version: remembered_version = True write_version(version) def forget_version(): """Remove version information.""" if remembered_version: write_version(unknown_version)