Mercurial > hg > mercurial-crew-with-dirclash
view mercurial/version.py @ 5378:8a2915f57dfc
convert: add a mode where mercurial_sink skips empty revisions.
The getchanges function of some converter_source classes can return
some false positives. I.e. they sometimes claim that a file "foo"
was changed in some revision, even though its contents are still the
same.
convert_svn is particularly bad, but I think this can also happen with
convert_cvs and, at least in theory, with mercurial_source.
For regular conversions this is not really a problem - as long as
getfile returns the right contents, we'll get a converted revision
with the right contents. But when we use --filemap, this could lead
to superfluous revisions being converted.
Instead of fixing every converter_source, I decided to change
mercurial_sink to work around this problem.
When --filemap is used, we're interested only in revisions that touch
some specific files. If a revision doesn't change any of these files,
then we're not interested in it (at least for revisions with a single
parent; merges are special).
For mercurial_sink, we abuse this property and rollback a commit if
the manifest text hasn't changed. This avoids duplicating the logic
from localrepo.filecommit to detect unchanged files.
author | Alexis S. L. Carvalho <alexis@cecm.usp.br> |
---|---|
date | Thu, 04 Oct 2007 23:21:37 -0300 |
parents | cff3e4b4a8de |
children |
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# 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)