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# Copyright (C) 2010 Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
"""Merge hook for bzr's NEWS file.
To enable this plugin, add a section to your branch.conf or location.conf
like::
[/home/user/code/bzr]
news_merge_files = NEWS
news_merge_files:policy = recurse
The news_merge_files config option takes a list of file paths, separated by
commas.
Limitations:
* if there's a conflict in more than just bullet points, this doesn't yet know
how to resolve that, so bzr will fallback to the default line-based merge.
"""
# Since we are a built-in plugin we share the bzrlib version
from bzrlib import version_info
# Put most of the code in a separate module that we lazy-import to keep the
# overhead of this plugin as minimal as possible.
from bzrlib.lazy_import import lazy_import
lazy_import(globals(), """
from bzrlib.plugins.news_merge.news_merge import news_merger
""")
from bzrlib.merge import Merger
def news_merge_hook(params):
"""Merger.merge_file_content hook function for bzr-format NEWS files."""
# First, check whether this custom merge logic should be used. We expect
# most files should not be merged by this file.
if params.winner == 'other':
# OTHER is a straight winner, rely on default merge.
return 'not_applicable', None
elif not params.is_file_merge():
# THIS and OTHER aren't both files.
return 'not_applicable', None
elif not filename_matches_config(params):
# The filename isn't listed in the 'news_merge_files' config option.
return 'not_applicable', None
return news_merger(params)
def filename_matches_config(params):
affected_files = getattr(params, '_news_merge_affected_files', None)
if affected_files is None:
config = params.merger.this_tree.branch.get_config()
# Until bzr provides a better policy for caching the config, we just
# add the part we're interested in to the params to avoid reading the
# config files repeatedly (bazaar.conf, location.conf, branch.conf).
affected_files = config.get_user_option_as_list('news_merge_files')
if affected_files is None:
# If nothing was specified in the config, we have nothing to do,
# but we use None in the params to start the caching.
affected_files = []
params._news_merge_affected_files = affected_files
if affected_files:
filename = params.merger.this_tree.id2path(params.file_id)
if filename in affected_files:
return True
return False
def install_hook():
Merger.hooks.install_named_hook(
'merge_file_content', news_merge_hook, 'NEWS file merge')
install_hook()
def load_tests(basic_tests, module, loader):
testmod_names = [
'tests',
]
basic_tests.addTest(loader.loadTestsFromModuleNames(
["%s.%s" % (__name__, tmn) for tmn in testmod_names]))
return basic_tests
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