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# Copyright (C) 2005, 2006, 2007 Canonical Ltd
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Code to show logs of changes.
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Various flavors of log can be produced:
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* for one file, or the whole tree, and (not done yet) for
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files in a given directory
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* in "verbose" mode with a description of what changed from one
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* with file-ids and revision-ids shown
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Logs are actually written out through an abstract LogFormatter
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interface, which allows for different preferred formats. Plugins can
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Logs can be produced in either forward (oldest->newest) or reverse
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(newest->oldest) order.
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Logs can be filtered to show only revisions matching a particular
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search string, or within a particular range of revisions. The range
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can be given as date/times, which are reduced to revisions before
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In verbose mode we show a summary of what changed in each particular
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revision. Note that this is the delta for changes in that revision
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relative to its left-most parent, not the delta relative to the last
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logged revision. So for example if you ask for a verbose log of
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changes touching hello.c you will get a list of those revisions also
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listing other things that were changed in the same revision, but not
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all the changes since the previous revision that touched hello.c.
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from itertools import (
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from warnings import (
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from bzrlib.lazy_import import lazy_import
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lazy_import(globals(), """
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repository as _mod_repository,
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revision as _mod_revision,
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from bzrlib.osutils import (
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get_terminal_encoding,
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def find_touching_revisions(branch, file_id):
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"""Yield a description of revisions which affect the file_id.
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Each returned element is (revno, revision_id, description)
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This is the list of revisions where the file is either added,
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modified, renamed or deleted.
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TODO: Perhaps some way to limit this to only particular revisions,
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or to traverse a non-mainline set of revisions?
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for revision_id in branch.revision_history():
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this_inv = branch.repository.get_revision_inventory(revision_id)
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if file_id in this_inv:
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this_ie = this_inv[file_id]
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this_path = this_inv.id2path(file_id)
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this_ie = this_path = None
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# now we know how it was last time, and how it is in this revision.
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# are those two states effectively the same or not?
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if not this_ie and not last_ie:
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# not present in either
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elif this_ie and not last_ie:
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yield revno, revision_id, "added " + this_path
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elif not this_ie and last_ie:
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yield revno, revision_id, "deleted " + last_path
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elif this_path != last_path:
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yield revno, revision_id, ("renamed %s => %s" % (last_path, this_path))
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elif (this_ie.text_size != last_ie.text_size
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or this_ie.text_sha1 != last_ie.text_sha1):
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yield revno, revision_id, "modified " + this_path
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last_path = this_path
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def _enumerate_history(branch):
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for rev_id in branch.revision_history():
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rh.append((revno, rev_id))
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specific_fileid=None,
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"""Write out human-readable log of commits to this branch.
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LogFormatter object to show the output.
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If true, list only the commits affecting the specified
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file, rather than all commits.
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If true show added/changed/deleted/renamed files.
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'reverse' (default) is latest to earliest;
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'forward' is earliest to latest.
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If not None, only show revisions >= start_revision
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If not None, only show revisions <= end_revision
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If not None, only show revisions with matching commit messages
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If not None or 0, only show limit revisions
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if getattr(lf, 'begin_log', None):
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_show_log(branch, lf, specific_fileid, verbose, direction,
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start_revision, end_revision, search, limit)
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if getattr(lf, 'end_log', None):
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def _show_log(branch,
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specific_fileid=None,
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"""Worker function for show_log - see show_log."""
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if not isinstance(lf, LogFormatter):
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warn("not a LogFormatter instance: %r" % lf)
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trace.mutter('get log for file_id %r', specific_fileid)
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generate_merge_revisions = getattr(lf, 'supports_merge_revisions', False)
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allow_single_merge_revision = getattr(lf,
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'supports_single_merge_revision', False)
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view_revisions = calculate_view_revisions(branch, start_revision,
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end_revision, direction,
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generate_merge_revisions,
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allow_single_merge_revision)
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if search is not None:
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searchRE = re.compile(search, re.IGNORECASE)
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generate_tags = getattr(lf, 'supports_tags', False)
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if branch.supports_tags():
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rev_tag_dict = branch.tags.get_reverse_tag_dict()
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generate_delta = verbose and getattr(lf, 'supports_delta', False)
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# now we just print all the revisions
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for (rev_id, revno, merge_depth), rev, delta in _iter_revisions(
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branch.repository, view_revisions, generate_delta):
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if not searchRE.search(rev.message):
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lr = LogRevision(rev, revno, merge_depth, delta,
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rev_tag_dict.get(rev_id))
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if log_count >= limit:
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def calculate_view_revisions(branch, start_revision, end_revision, direction,
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specific_fileid, generate_merge_revisions,
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allow_single_merge_revision):
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if (not generate_merge_revisions and start_revision is end_revision is
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None and direction == 'reverse' and specific_fileid is None):
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return _linear_view_revisions(branch)
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mainline_revs, rev_nos, start_rev_id, end_rev_id = \
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_get_mainline_revs(branch, start_revision, end_revision)
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if not mainline_revs:
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if direction == 'reverse':
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start_rev_id, end_rev_id = end_rev_id, start_rev_id
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generate_single_revision = False
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if ((not generate_merge_revisions)
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and ((start_rev_id and (start_rev_id not in rev_nos))
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or (end_rev_id and (end_rev_id not in rev_nos)))):
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generate_single_revision = ((start_rev_id == end_rev_id)
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and allow_single_merge_revision)
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if not generate_single_revision:
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raise errors.BzrCommandError('Selected log formatter only supports'
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' mainline revisions.')
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generate_merge_revisions = generate_single_revision
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view_revs_iter = get_view_revisions(mainline_revs, rev_nos, branch,
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direction, include_merges=generate_merge_revisions)
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view_revisions = _filter_revision_range(list(view_revs_iter),
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if view_revisions and generate_single_revision:
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view_revisions = view_revisions[0:1]
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view_revisions = _filter_revisions_touching_file_id(branch,
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# rebase merge_depth - unless there are no revisions or
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# either the first or last revision have merge_depth = 0.
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if view_revisions and view_revisions[0][2] and view_revisions[-1][2]:
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min_depth = min([d for r,n,d in view_revisions])
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view_revisions = [(r,n,d-min_depth) for r,n,d in view_revisions]
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return view_revisions
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def _linear_view_revisions(branch):
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start_revno, start_revision_id = branch.last_revision_info()
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repo = branch.repository
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revision_ids = repo.iter_reverse_revision_history(start_revision_id)
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for num, revision_id in enumerate(revision_ids):
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yield revision_id, str(start_revno - num), 0
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def _iter_revisions(repository, view_revisions, generate_delta):
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view_revisions = iter(view_revisions)
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cur_view_revisions = [d for x, d in zip(range(num), view_revisions)]
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if len(cur_view_revisions) == 0:
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# r = revision, n = revno, d = merge depth
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revision_ids = [r for (r, n, d) in cur_view_revisions]
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revisions = repository.get_revisions(revision_ids)
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deltas = repository.get_deltas_for_revisions(revisions)
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cur_deltas = dict(izip((r.revision_id for r in revisions),
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for view_data, revision in izip(cur_view_revisions, revisions):
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yield view_data, revision, cur_deltas.get(revision.revision_id)
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num = min(int(num * 1.5), 200)
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def _get_mainline_revs(branch, start_revision, end_revision):
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"""Get the mainline revisions from the branch.
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Generates the list of mainline revisions for the branch.
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:param branch: The branch containing the revisions.
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:param start_revision: The first revision to be logged.
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For backwards compatibility this may be a mainline integer revno,
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but for merge revision support a RevisionInfo is expected.
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:param end_revision: The last revision to be logged.
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For backwards compatibility this may be a mainline integer revno,
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but for merge revision support a RevisionInfo is expected.
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:return: A (mainline_revs, rev_nos, start_rev_id, end_rev_id) tuple.
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branch_revno, branch_last_revision = branch.last_revision_info()
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if branch_revno == 0:
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return None, None, None, None
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# For mainline generation, map start_revision and end_revision to
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# mainline revnos. If the revision is not on the mainline choose the
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# appropriate extreme of the mainline instead - the extra will be
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# Also map the revisions to rev_ids, to be used in the later filtering
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if start_revision is None:
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if isinstance(start_revision, revisionspec.RevisionInfo):
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start_rev_id = start_revision.rev_id
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start_revno = start_revision.revno or 1
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branch.check_real_revno(start_revision)
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start_revno = start_revision
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if end_revision is None:
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end_revno = branch_revno
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if isinstance(end_revision, revisionspec.RevisionInfo):
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end_rev_id = end_revision.rev_id
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end_revno = end_revision.revno or branch_revno
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branch.check_real_revno(end_revision)
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end_revno = end_revision
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if ((start_rev_id == _mod_revision.NULL_REVISION)
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or (end_rev_id == _mod_revision.NULL_REVISION)):
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raise errors.BzrCommandError('Logging revision 0 is invalid.')
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if start_revno > end_revno:
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raise errors.BzrCommandError("Start revision must be older than "
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if end_revno < start_revno:
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return None, None, None, None
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cur_revno = branch_revno
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for revision_id in branch.repository.iter_reverse_revision_history(
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branch_last_revision):
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if cur_revno < start_revno:
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# We have gone far enough, but we always add 1 more revision
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rev_nos[revision_id] = cur_revno
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mainline_revs.append(revision_id)
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if cur_revno <= end_revno:
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rev_nos[revision_id] = cur_revno
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mainline_revs.append(revision_id)
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# We walked off the edge of all revisions, so we add a 'None' marker
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mainline_revs.append(None)
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mainline_revs.reverse()
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# override the mainline to look like the revision history.
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return mainline_revs, rev_nos, start_rev_id, end_rev_id
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def _filter_revision_range(view_revisions, start_rev_id, end_rev_id):
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"""Filter view_revisions based on revision ranges.
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:param view_revisions: A list of (revision_id, dotted_revno, merge_depth)
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tuples to be filtered.
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:param start_rev_id: If not NONE specifies the first revision to be logged.
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If NONE then all revisions up to the end_rev_id are logged.
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:param end_rev_id: If not NONE specifies the last revision to be logged.
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If NONE then all revisions up to the end of the log are logged.
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:return: The filtered view_revisions.
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if start_rev_id or end_rev_id:
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revision_ids = [r for r, n, d in view_revisions]
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start_index = revision_ids.index(start_rev_id)
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if start_rev_id == end_rev_id:
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end_index = start_index
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end_index = revision_ids.index(end_rev_id)
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end_index = len(view_revisions) - 1
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# To include the revisions merged into the last revision,
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# extend end_rev_id down to, but not including, the next rev
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# with the same or lesser merge_depth
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end_merge_depth = view_revisions[end_index][2]
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for index in xrange(end_index+1, len(view_revisions)+1):
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if view_revisions[index][2] <= end_merge_depth:
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end_index = index - 1
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# if the search falls off the end then log to the end as well
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end_index = len(view_revisions) - 1
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view_revisions = view_revisions[start_index:end_index+1]
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return view_revisions
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def _filter_revisions_touching_file_id(branch, file_id, mainline_revisions,
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"""Return the list of revision ids which touch a given file id.
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The function filters view_revisions and returns a subset.
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This includes the revisions which directly change the file id,
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and the revisions which merge these changes. So if the
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And 'C' changes a file, then both C and D will be returned.
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This will also can be restricted based on a subset of the mainline.
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:return: A list of (revision_id, dotted_revno, merge_depth) tuples.
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# find all the revisions that change the specific file
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# build the ancestry of each revision in the graph
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# - only listing the ancestors that change the specific file.
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graph = branch.repository.get_graph()
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# This asks for all mainline revisions, which means we only have to spider
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# sideways, rather than depth history. That said, its still size-of-history
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# and should be addressed.
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# mainline_revisions always includes an extra revision at the beginning, so
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parent_map = dict(((key, value) for key, value in
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graph.iter_ancestry(mainline_revisions[1:]) if value is not None))
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sorted_rev_list = tsort.topo_sort(parent_map.items())
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text_keys = [(file_id, rev_id) for rev_id in sorted_rev_list]
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modified_text_versions = branch.repository.texts.get_parent_map(text_keys)
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for rev in sorted_rev_list:
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text_key = (file_id, rev)
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parents = parent_map[rev]
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if text_key not in modified_text_versions and len(parents) == 1:
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# We will not be adding anything new, so just use a reference to
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# the parent ancestry.
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rev_ancestry = ancestry[parents[0]]
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if text_key in modified_text_versions:
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rev_ancestry.add(rev)
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for parent in parents:
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if parent not in ancestry:
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# parent is a Ghost, which won't be present in
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# sorted_rev_list, but we may access it later, so create an
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ancestry[parent] = set()
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rev_ancestry = rev_ancestry.union(ancestry[parent])
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ancestry[rev] = rev_ancestry
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def is_merging_rev(r):
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parents = parent_map[r]
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leftparent = parents[0]
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for rightparent in parents[1:]:
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if not ancestry[leftparent].issuperset(
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ancestry[rightparent]):
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# filter from the view the revisions that did not change or merge
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return [(r, n, d) for r, n, d in view_revs_iter
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if (file_id, r) in modified_text_versions or is_merging_rev(r)]
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def get_view_revisions(mainline_revs, rev_nos, branch, direction,
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include_merges=True):
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"""Produce an iterator of revisions to show
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:return: an iterator of (revision_id, revno, merge_depth)
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(if there is no revno for a revision, None is supplied)
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if include_merges is False:
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revision_ids = mainline_revs[1:]
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if direction == 'reverse':
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revision_ids.reverse()
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for revision_id in revision_ids:
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yield revision_id, str(rev_nos[revision_id]), 0
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graph = branch.repository.get_graph()
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# This asks for all mainline revisions, which means we only have to spider
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# sideways, rather than depth history. That said, its still size-of-history
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# and should be addressed.
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# mainline_revisions always includes an extra revision at the beginning, so
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parent_map = dict(((key, value) for key, value in
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graph.iter_ancestry(mainline_revs[1:]) if value is not None))
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# filter out ghosts; merge_sort errors on ghosts.
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rev_graph = _mod_repository._strip_NULL_ghosts(parent_map)
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merge_sorted_revisions = tsort.merge_sort(
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if direction == 'forward':
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# forward means oldest first.
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merge_sorted_revisions = reverse_by_depth(merge_sorted_revisions)
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elif direction != 'reverse':
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raise ValueError('invalid direction %r' % direction)
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for sequence, rev_id, merge_depth, revno, end_of_merge in merge_sorted_revisions:
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yield rev_id, '.'.join(map(str, revno)), merge_depth
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def reverse_by_depth(merge_sorted_revisions, _depth=0):
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"""Reverse revisions by depth.
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Revisions with a different depth are sorted as a group with the previous
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revision of that depth. There may be no topological justification for this,
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but it looks much nicer.
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for val in merge_sorted_revisions:
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zd_revisions.append([val])
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zd_revisions[-1].append(val)
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for revisions in zd_revisions:
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if len(revisions) > 1:
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revisions[1:] = reverse_by_depth(revisions[1:], _depth + 1)
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zd_revisions.reverse()
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for chunk in zd_revisions:
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class LogRevision(object):
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"""A revision to be logged (by LogFormatter.log_revision).
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A simple wrapper for the attributes of a revision to be logged.
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The attributes may or may not be populated, as determined by the
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logging options and the log formatter capabilities.
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def __init__(self, rev=None, revno=None, merge_depth=0, delta=None,
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self.merge_depth = merge_depth
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class LogFormatter(object):
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"""Abstract class to display log messages.
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At a minimum, a derived class must implement the log_revision method.
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If the LogFormatter needs to be informed of the beginning or end of
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a log it should implement the begin_log and/or end_log hook methods.
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A LogFormatter should define the following supports_XXX flags
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to indicate which LogRevision attributes it supports:
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- supports_delta must be True if this log formatter supports delta.
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Otherwise the delta attribute may not be populated.
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- supports_merge_revisions must be True if this log formatter supports
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merge revisions. If not, and if supports_single_merge_revisions is
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also not True, then only mainline revisions will be passed to the
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- supports_single_merge_revision must be True if this log formatter
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supports logging only a single merge revision. This flag is
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only relevant if supports_merge_revisions is not True.
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- supports_tags must be True if this log formatter supports tags.
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Otherwise the tags attribute may not be populated.
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Plugins can register functions to show custom revision properties using
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the properties_handler_registry. The registered function
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must respect the following interface description:
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def my_show_properties(properties_dict):
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# code that returns a dict {'name':'value'} of the properties
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def __init__(self, to_file, show_ids=False, show_timezone='original'):
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self.to_file = to_file
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self.show_ids = show_ids
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self.show_timezone = show_timezone
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# TODO: uncomment this block after show() has been removed.
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# Until then defining log_revision would prevent _show_log calling show()
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# in legacy formatters.
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# def log_revision(self, revision):
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# :param revision: The LogRevision to be logged.
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# raise NotImplementedError('not implemented in abstract base')
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def short_committer(self, rev):
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name, address = config.parse_username(rev.committer)
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def short_author(self, rev):
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name, address = config.parse_username(rev.get_apparent_author())
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def show_properties(self, revision, indent):
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"""Displays the custom properties returned by each registered handler.
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If a registered handler raises an error it is propagated.
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for key, handler in properties_handler_registry.iteritems():
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for key, value in handler(revision).items():
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self.to_file.write(indent + key + ': ' + value + '\n')
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class LongLogFormatter(LogFormatter):
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supports_merge_revisions = True
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supports_delta = True
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def log_revision(self, revision):
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"""Log a revision, either merged or not."""
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indent = ' ' * revision.merge_depth
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to_file = self.to_file
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to_file.write(indent + '-' * 60 + '\n')
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if revision.revno is not None:
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to_file.write(indent + 'revno: %s\n' % (revision.revno,))
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to_file.write(indent + 'tags: %s\n' % (', '.join(revision.tags)))
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to_file.write(indent + 'revision-id: ' + revision.rev.revision_id)
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for parent_id in revision.rev.parent_ids:
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to_file.write(indent + 'parent: %s\n' % (parent_id,))
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self.show_properties(revision.rev, indent)
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author = revision.rev.properties.get('author', None)
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if author is not None:
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to_file.write(indent + 'author: %s\n' % (author,))
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to_file.write(indent + 'committer: %s\n' % (revision.rev.committer,))
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branch_nick = revision.rev.properties.get('branch-nick', None)
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if branch_nick is not None:
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to_file.write(indent + 'branch nick: %s\n' % (branch_nick,))
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date_str = format_date(revision.rev.timestamp,
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revision.rev.timezone or 0,
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to_file.write(indent + 'timestamp: %s\n' % (date_str,))
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to_file.write(indent + 'message:\n')
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if not revision.rev.message:
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to_file.write(indent + ' (no message)\n')
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message = revision.rev.message.rstrip('\r\n')
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for l in message.split('\n'):
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to_file.write(indent + ' %s\n' % (l,))
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if revision.delta is not None:
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revision.delta.show(to_file, self.show_ids, indent=indent)
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class ShortLogFormatter(LogFormatter):
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supports_delta = True
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supports_single_merge_revision = True
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def log_revision(self, revision):
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to_file = self.to_file
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if len(revision.rev.parent_ids) > 1:
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is_merge = ' [merge]'
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to_file.write("%5s %s\t%s%s\n" % (revision.revno,
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self.short_author(revision.rev),
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format_date(revision.rev.timestamp,
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revision.rev.timezone or 0,
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self.show_timezone, date_fmt="%Y-%m-%d",
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to_file.write(' revision-id:%s\n' % (revision.rev.revision_id,))
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if not revision.rev.message:
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to_file.write(' (no message)\n')
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message = revision.rev.message.rstrip('\r\n')
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for l in message.split('\n'):
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to_file.write(' %s\n' % (l,))
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# TODO: Why not show the modified files in a shorter form as
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# well? rewrap them single lines of appropriate length
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if revision.delta is not None:
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revision.delta.show(to_file, self.show_ids)
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class LineLogFormatter(LogFormatter):
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supports_single_merge_revision = True
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def __init__(self, *args, **kwargs):
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super(LineLogFormatter, self).__init__(*args, **kwargs)
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self._max_chars = terminal_width() - 1
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def truncate(self, str, max_len):
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if len(str) <= max_len:
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return str[:max_len-3]+'...'
754
def date_string(self, rev):
755
return format_date(rev.timestamp, rev.timezone or 0,
756
self.show_timezone, date_fmt="%Y-%m-%d",
759
def message(self, rev):
761
return '(no message)'
765
def log_revision(self, revision):
766
self.to_file.write(self.log_string(revision.revno, revision.rev,
768
self.to_file.write('\n')
770
def log_string(self, revno, rev, max_chars):
771
"""Format log info into one string. Truncate tail of string
772
:param revno: revision number (int) or None.
773
Revision numbers counts from 1.
774
:param rev: revision info object
775
:param max_chars: maximum length of resulting string
776
:return: formatted truncated string
780
# show revno only when is not None
781
out.append("%s:" % revno)
782
out.append(self.truncate(self.short_author(rev), 20))
783
out.append(self.date_string(rev))
784
out.append(rev.get_summary())
785
return self.truncate(" ".join(out).rstrip('\n'), max_chars)
788
def line_log(rev, max_chars):
789
lf = LineLogFormatter(None)
790
return lf.log_string(None, rev, max_chars)
793
class LogFormatterRegistry(registry.Registry):
794
"""Registry for log formatters"""
796
def make_formatter(self, name, *args, **kwargs):
797
"""Construct a formatter from arguments.
799
:param name: Name of the formatter to construct. 'short', 'long' and
802
return self.get(name)(*args, **kwargs)
804
def get_default(self, branch):
805
return self.get(branch.get_config().log_format())
808
log_formatter_registry = LogFormatterRegistry()
811
log_formatter_registry.register('short', ShortLogFormatter,
812
'Moderately short log format')
813
log_formatter_registry.register('long', LongLogFormatter,
814
'Detailed log format')
815
log_formatter_registry.register('line', LineLogFormatter,
816
'Log format with one line per revision')
819
def register_formatter(name, formatter):
820
log_formatter_registry.register(name, formatter)
823
def log_formatter(name, *args, **kwargs):
824
"""Construct a formatter from arguments.
826
name -- Name of the formatter to construct; currently 'long', 'short' and
827
'line' are supported.
830
return log_formatter_registry.make_formatter(name, *args, **kwargs)
832
raise errors.BzrCommandError("unknown log formatter: %r" % name)
835
def show_one_log(revno, rev, delta, verbose, to_file, show_timezone):
836
# deprecated; for compatibility
837
lf = LongLogFormatter(to_file=to_file, show_timezone=show_timezone)
838
lf.show(revno, rev, delta)
841
def show_changed_revisions(branch, old_rh, new_rh, to_file=None,
843
"""Show the change in revision history comparing the old revision history to the new one.
845
:param branch: The branch where the revisions exist
846
:param old_rh: The old revision history
847
:param new_rh: The new revision history
848
:param to_file: A file to write the results to. If None, stdout will be used
851
to_file = codecs.getwriter(get_terminal_encoding())(sys.stdout,
853
lf = log_formatter(log_format,
856
show_timezone='original')
858
# This is the first index which is different between
861
for i in xrange(max(len(new_rh),
865
or new_rh[i] != old_rh[i]):
870
to_file.write('Nothing seems to have changed\n')
872
## TODO: It might be nice to do something like show_log
873
## and show the merged entries. But since this is the
874
## removed revisions, it shouldn't be as important
875
if base_idx < len(old_rh):
876
to_file.write('*'*60)
877
to_file.write('\nRemoved Revisions:\n')
878
for i in range(base_idx, len(old_rh)):
879
rev = branch.repository.get_revision(old_rh[i])
880
lr = LogRevision(rev, i+1, 0, None)
882
to_file.write('*'*60)
883
to_file.write('\n\n')
884
if base_idx < len(new_rh):
885
to_file.write('Added Revisions:\n')
891
start_revision=base_idx+1,
892
end_revision=len(new_rh),
896
properties_handler_registry = registry.Registry()
added
removed
bzrlib/log.py
