def guess_commit(section, repo, options):
"""Guess the last commit documented in a changelog header"""
if not section:
return None
header = section.header
# Try to parse the fields from the header revision
rev_re = '^%s$' % re.sub(r'%\((\S+?)\)s', r'(?P<\1>\S+)',
options.changelog_revision)
match = re.match(rev_re, header['revision'], re.I)
fields = match.groupdict() if match else {}
# First, try to find tag-name, if present
if 'tagname' in fields:
gbp.log.debug("Trying to find tagname %s" % fields['tagname'])
try:
return repo.rev_parse("%s^0" % fields['tagname'])
except GitRepositoryError:
gbp.log.warn("Changelog points to tagname '%s' which is not found "
"in the git repository" % fields['tagname'])
# Next, try to find packaging tag matching the version
tag_str_fields = {'vendor': options.vendor}
if 'version' in fields:
gbp.log.debug("Trying to find packaging tag for version '%s'" %
fields['version'])
full_version = fields['version']
tag_str_fields.update(RpmPkgPolicy.split_full_version(full_version))
elif 'upstreamversion' in fields:
gbp.log.debug("Trying to find packaging tag for version '%s'" %
fields['upstreamversion'])
tag_str_fields['upstreamversion'] = fields['upstreamversion']
if 'release' in fields:
tag_str_fields['release'] = fields['release']
commit = repo.find_version(options.packaging_tag, tag_str_fields)
if commit:
return commit
else:
gbp.log.info("Couldn't find packaging tag for version %s" %
header['revision'])
# As a last resort we look at the timestamp
timestamp = header['time'].isoformat()
last = repo.get_commits(num=1, options="--until='%s'" % timestamp)
if last:
gbp.log.info("Using commit (%s) before the last changelog timestamp "
"(%s)" % (last, timestamp))
return last[0]
return None
