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# Copyright (C) 2005 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 mainline 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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# TODO: option to show delta summaries for merged-in revisions
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import bzrlib.errors as errors
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from bzrlib.tree import EmptyTree
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from bzrlib.delta import compare_trees
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from bzrlib.trace import mutter
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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.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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def _get_revision_delta(branch, revno):
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"""Return the delta for a mainline revision.
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This is used to show summaries in verbose logs, and also for finding
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revisions which touch a given file."""
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# XXX: What are we supposed to do when showing a summary for something
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# other than a mainline revision. The delta to it's first parent, or
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# (more useful) the delta to a nominated other revision.
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return branch.get_revision_delta(revno)
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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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_show_log(branch, lf, specific_fileid, verbose, direction,
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start_revision, end_revision, search)
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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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from bzrlib.osutils import format_date
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from bzrlib.errors import BzrCheckError
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from bzrlib.textui import show_status
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from warnings import warn
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if not isinstance(lf, LogFormatter):
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warn("not a LogFormatter instance: %r" % lf)
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mutter('get log for file_id %r', specific_fileid)
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if search is not None:
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searchRE = re.compile(search, re.IGNORECASE)
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which_revs = _enumerate_history(branch)
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if start_revision is None:
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branch.check_real_revno(start_revision)
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if end_revision is None:
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end_revision = len(which_revs)
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branch.check_real_revno(end_revision)
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# list indexes are 0-based; revisions are 1-based
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cut_revs = which_revs[(start_revision-1):(end_revision)]
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if direction == 'reverse':
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elif direction == 'forward':
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raise ValueError('invalid direction %r' % direction)
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revision_history = branch.revision_history()
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for revno, rev_id in cut_revs:
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if verbose or specific_fileid:
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delta = _get_revision_delta(branch, revno)
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if not delta.touches_file_id(specific_fileid):
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# although we calculated it, throw it away without display
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rev = branch.get_revision(rev_id)
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if not searchRE.search(rev.message):
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lf.show(revno, rev, delta)
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if hasattr(lf, 'show_merge'):
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# revno is 1 based, so -2 to get back 1 less.
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excludes = set(branch.get_ancestry(revision_history[revno - 2]))
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pending = list(rev.parent_ids)
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rev_id = pending.pop()
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if rev_id in excludes:
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# prevent showing merged revs twice if they multi-path.
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rev = branch.get_revision(rev_id)
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except errors.NoSuchRevision:
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pending.extend(rev.parent_ids)
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def deltas_for_log_dummy(branch, which_revs):
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"""Return all the revisions without intermediate deltas.
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Useful for log commands that won't need the delta information.
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for revno, revision_id in which_revs:
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yield revno, branch.get_revision(revision_id), None
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def deltas_for_log_reverse(branch, which_revs):
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"""Compute deltas for display in latest-to-earliest order.
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Sequence of (revno, revision_id) for the subset of history to examine
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Sequence of (revno, rev, delta)
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The delta is from the given revision to the next one in the
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sequence, which makes sense if the log is being displayed from
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last_revno = last_revision_id = last_tree = None
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for revno, revision_id in which_revs:
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this_tree = branch.revision_tree(revision_id)
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this_revision = branch.get_revision(revision_id)
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yield last_revno, last_revision, compare_trees(this_tree, last_tree, False)
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this_tree = EmptyTree(branch.get_root_id())
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last_revision = this_revision
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last_tree = this_tree
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this_tree = EmptyTree(branch.get_root_id())
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this_revno = last_revno - 1
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this_revision_id = branch.revision_history()[this_revno]
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this_tree = branch.revision_tree(this_revision_id)
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yield last_revno, last_revision, compare_trees(this_tree, last_tree, False)
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def deltas_for_log_forward(branch, which_revs):
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"""Compute deltas for display in forward log.
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Given a sequence of (revno, revision_id) pairs, return
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The delta is from the given revision to the next one in the
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sequence, which makes sense if the log is being displayed from
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last_revno = last_revision_id = last_tree = None
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prev_tree = EmptyTree(branch.get_root_id())
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for revno, revision_id in which_revs:
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this_tree = branch.revision_tree(revision_id)
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this_revision = branch.get_revision(revision_id)
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last_tree = EmptyTree(branch.get_root_id())
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last_revno = revno - 1
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last_revision_id = branch.revision_history()[last_revno]
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last_tree = branch.revision_tree(last_revision_id)
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yield revno, this_revision, compare_trees(last_tree, this_tree, False)
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last_revision = this_revision
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last_tree = this_tree
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class LogFormatter(object):
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"""Abstract class to display log messages."""
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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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def show(self, revno, rev, delta):
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raise NotImplementedError('not implemented in abstract base')
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def short_committer(self, rev):
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return re.sub('<.*@.*>', '', rev.committer).strip(' ')
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class LongLogFormatter(LogFormatter):
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def show(self, revno, rev, delta):
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return self._show_helper(revno=revno, rev=rev, delta=delta)
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def show_merge(self, rev):
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return self._show_helper(rev=rev, indent=' ', merged=True, delta=None)
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def _show_helper(self, rev=None, revno=None, indent='', merged=False, delta=None):
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"""Show a revision, either merged or not."""
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from bzrlib.osutils import format_date
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to_file = self.to_file
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print >>to_file, indent+'-' * 60
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if revno is not None:
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print >>to_file, 'revno:', revno
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print >>to_file, indent+'merged:', rev.revision_id
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print >>to_file, indent+'revision-id:', rev.revision_id
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for parent_id in rev.parent_ids:
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print >>to_file, indent+'parent:', parent_id
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print >>to_file, indent+'committer:', rev.committer
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print >>to_file, indent+'branch nick: %s' % \
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rev.properties['branch-nick']
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date_str = format_date(rev.timestamp,
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print >>to_file, indent+'timestamp: %s' % date_str
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print >>to_file, indent+'message:'
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print >>to_file, indent+' (no message)'
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for l in rev.message.split('\n'):
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print >>to_file, indent+' ' + l
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delta.show(to_file, self.show_ids)
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class ShortLogFormatter(LogFormatter):
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def show(self, revno, rev, delta):
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from bzrlib.osutils import format_date
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to_file = self.to_file
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date_str = format_date(rev.timestamp, rev.timezone or 0,
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print >>to_file, "%5d %s\t%s" % (revno, self.short_committer(rev),
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format_date(rev.timestamp, rev.timezone or 0,
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self.show_timezone, date_fmt="%Y-%m-%d",
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print >>to_file, ' revision-id:', rev.revision_id
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print >>to_file, ' (no message)'
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for l in rev.message.split('\n'):
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print >>to_file, ' ' + 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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delta.show(to_file, self.show_ids)
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class LineLogFormatter(LogFormatter):
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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]+'...'
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def date_string(self, rev):
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from bzrlib.osutils import format_date
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return format_date(rev.timestamp, rev.timezone or 0,
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self.show_timezone, date_fmt="%Y-%m-%d",
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def message(self, rev):
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return '(no message)'
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def show(self, revno, rev, delta):
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print >> self.to_file, self.log_string(rev, 79)
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def log_string(self, rev, max_chars):
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out = [self.truncate(self.short_committer(rev), 20)]
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out.append(self.date_string(rev))
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out.append(self.message(rev).replace('\n', ' '))
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return self.truncate(" ".join(out).rstrip('\n'), max_chars)
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def line_log(rev, max_chars):
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lf = LineLogFormatter(None)
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return lf.log_string(rev, max_chars)
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FORMATTERS = {'long': LongLogFormatter,
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'short': ShortLogFormatter,
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'line': LineLogFormatter,
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def log_formatter(name, *args, **kwargs):
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"""Construct a formatter from arguments.
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name -- Name of the formatter to construct; currently 'long', 'short' and
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'line' are supported.
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from bzrlib.errors import BzrCommandError
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return FORMATTERS[name](*args, **kwargs)
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raise BzrCommandError("unknown log formatter: %r" % name)
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def show_one_log(revno, rev, delta, verbose, to_file, show_timezone):
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# deprecated; for compatability
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lf = LongLogFormatter(to_file=to_file, show_timezone=show_timezone)
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lf.show(revno, rev, delta)
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def show_changed_revisions(branch, old_rh, new_rh, to_file=None, log_format='long'):
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"""Show the change in revision history comparing the old revision history to the new one.
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:param branch: The branch where the revisions exist
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:param old_rh: The old revision history
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:param new_rh: The new revision history
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:param to_file: A file to write the results to. If None, stdout will be used
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to_file = codecs.getwriter(bzrlib.user_encoding)(sys.stdout, errors='replace')
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lf = log_formatter(log_format,
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show_timezone='original')
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# This is the first index which is different between
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for i in xrange(max(len(new_rh),
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or new_rh[i] != old_rh[i]):
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to_file.write('Nothing seems to have changed\n')
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## TODO: It might be nice to do something like show_log
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## and show the merged entries. But since this is the
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## removed revisions, it shouldn't be as important
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if base_idx < len(old_rh):
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to_file.write('*'*60)
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to_file.write('\nRemoved Revisions:\n')
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for i in range(base_idx, len(old_rh)):
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rev = branch.get_revision(old_rh[i])
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lf.show(i+1, rev, None)
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to_file.write('*'*60)
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to_file.write('\n\n')
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if base_idx < len(new_rh):
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to_file.write('Added Revisions:\n')
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start_revision=base_idx+1,
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end_revision=len(new_rh),
added
removed
bzrlib/log.py
