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# Copyright (C) 2005, 2006 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""Routines for extracting all version information from a bzr branch."""
import time
from bzrlib.osutils import local_time_offset, format_date
# This contains a map of format id => formatter
# None is considered the default formatter
_version_formats = {}
def create_date_str(timestamp=None, offset=None):
"""Just a wrapper around format_date to provide the right format.
We don't want to use '%a' in the time string, because it is locale
dependant. We also want to force timezone original, and show_offset
Without parameters this function yields the current date in the local
time zone.
"""
if timestamp is None and offset is None:
timestamp = time.time()
offset = local_time_offset()
return format_date(timestamp, offset, date_fmt='%Y-%m-%d %H:%M:%S',
timezone='original', show_offset=True)
class VersionInfoBuilder(object):
"""A class which lets you build up information about a revision."""
def __init__(self, branch, working_tree=None,
check_for_clean=False,
include_revision_history=False,
include_file_revisions=False,
):
"""Build up information about the given branch.
If working_tree is given, it can be checked for changes.
:param branch: The branch to work on
:param working_tree: If supplied, preferentially check
the working tree for changes.
:param check_for_clean: If False, we will skip the expense
of looking for changes.
:param include_revision_history: If True, the output
will include the full mainline revision history, including
date and message
:param include_file_revisions: The output should
include the explicit last-changed revision for each file.
"""
self._branch = branch
self._working_tree = working_tree
self._check = check_for_clean
self._include_history = include_revision_history
self._include_file_revs = include_file_revisions
self._clean = None
self._file_revisions = {}
self._revision_history_info= []
def _extract_file_revisions(self):
"""Extract the working revisions for all files"""
# Things seem clean if we never look :)
self._clean = True
if self._working_tree is not None:
basis_tree = self._working_tree.basis_tree()
# TODO: jam 20070215 The working tree should actually be locked at
# a higher level, but this will do for now.
self._working_tree.lock_read()
else:
basis_tree = self._branch.basis_tree()
basis_tree.lock_read()
try:
# Build up the list from the basis inventory
for info in basis_tree.list_files(include_root=True):
self._file_revisions[info[0]] = info[-1].revision
if not self._check or self._working_tree is None:
return
delta = self._working_tree.changes_from(basis_tree,
include_root=True)
# Using a 2-pass algorithm for renames. This is because you might have
# renamed something out of the way, and then created a new file
# in which case we would rather see the new marker
# Or you might have removed the target, and then renamed
# in which case we would rather see the renamed marker
for (old_path, new_path, file_id,
kind, text_mod, meta_mod) in delta.renamed:
self._clean = False
self._file_revisions[old_path] = u'renamed to %s' % (new_path,)
for path, file_id, kind in delta.removed:
self._clean = False
self._file_revisions[path] = 'removed'
for path, file_id, kind in delta.added:
self._clean = False
self._file_revisions[path] = 'new'
for (old_path, new_path, file_id,
kind, text_mod, meta_mod) in delta.renamed:
self._clean = False
self._file_revisions[new_path] = u'renamed from %s' % (old_path,)
for path, file_id, kind, text_mod, meta_mod in delta.modified:
self._clean = False
self._file_revisions[path] = 'modified'
for path in self._working_tree.unknowns():
self._clean = False
self._file_revisions[path] = 'unversioned'
finally:
basis_tree.unlock()
if self._working_tree is not None:
self._working_tree.unlock()
def _extract_revision_history(self):
"""Find the messages for all revisions in history."""
# Unfortunately, there is no WorkingTree.revision_history
rev_hist = self._branch.revision_history()
if self._working_tree is not None:
last_rev = self._working_tree.last_revision()
assert last_rev in rev_hist, \
"Working Tree's last revision not in branch.revision_history"
rev_hist = rev_hist[:rev_hist.index(last_rev)+1]
repository = self._branch.repository
repository.lock_read()
try:
for revision_id in rev_hist:
rev = repository.get_revision(revision_id)
self._revision_history_info.append(
(rev.revision_id, rev.message,
rev.timestamp, rev.timezone))
finally:
repository.unlock()
def _get_revision_id(self):
"""Get the revision id we are working on."""
if self._working_tree is not None:
return self._working_tree.last_revision()
return self._branch.last_revision()
def generate(self, to_file):
"""Output the version information to the supplied file.
:param to_file: The file to write the stream to. The output
will already be encoded, so to_file should not try
to change encodings.
:return: None
"""
raise NotImplementedError(VersionInfoBuilder.generate)
def register_builder(format, module, class_name):
"""Register a version info format.
:param format: The short name of the format, this will be used as the
lookup key.
:param module: The string name to the module where the format class
can be found
:param class_name: The string name of the class to instantiate
"""
if len(_version_formats) == 0:
_version_formats[None] = (module, class_name)
_version_formats[format] = (module, class_name)
def get_builder(format):
"""Get a handle to the version info builder class
:param format: The lookup key supplied to register_builder
:return: A class, which follows the VersionInfoBuilder api.
"""
builder_module, builder_class_name = _version_formats[format]
module = __import__(builder_module, globals(), locals(),
[builder_class_name])
klass = getattr(module, builder_class_name)
return klass
def get_builder_formats():
"""Get the possible list of formats"""
formats = _version_formats.keys()
formats.remove(None)
return formats
register_builder('rio',
'bzrlib.version_info_formats.format_rio',
'RioVersionInfoBuilder')
register_builder('python',
'bzrlib.version_info_formats.format_python',
'PythonVersionInfoBuilder')
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