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|
# Copyright (C) 2005, 2006, 2007 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
"""Code to show logs of changes.
Various flavors of log can be produced:
* for one file, or the whole tree, and (not done yet) for
files in a given directory
* in "verbose" mode with a description of what changed from one
version to the next
* with file-ids and revision-ids shown
Logs are actually written out through an abstract LogFormatter
interface, which allows for different preferred formats. Plugins can
register formats too.
Logs can be produced in either forward (oldest->newest) or reverse
(newest->oldest) order.
Logs can be filtered to show only revisions matching a particular
search string, or within a particular range of revisions. The range
can be given as date/times, which are reduced to revisions before
calling in here.
In verbose mode we show a summary of what changed in each particular
revision. Note that this is the delta for changes in that revision
relative to its mainline parent, not the delta relative to the last
logged revision. So for example if you ask for a verbose log of
changes touching hello.c you will get a list of those revisions also
listing other things that were changed in the same revision, but not
all the changes since the previous revision that touched hello.c.
"""
# TODO: option to show delta summaries for merged-in revisions
from itertools import izip
import re
from bzrlib import (
registry,
symbol_versioning,
)
import bzrlib.errors as errors
from bzrlib.symbol_versioning import (
deprecated_method,
zero_eleven,
zero_seventeen,
)
from bzrlib.trace import mutter
from bzrlib.tsort import (
merge_sort,
topo_sort,
)
def find_touching_revisions(branch, file_id):
"""Yield a description of revisions which affect the file_id.
Each returned element is (revno, revision_id, description)
This is the list of revisions where the file is either added,
modified, renamed or deleted.
TODO: Perhaps some way to limit this to only particular revisions,
or to traverse a non-mainline set of revisions?
"""
last_ie = None
last_path = None
revno = 1
for revision_id in branch.revision_history():
this_inv = branch.repository.get_revision_inventory(revision_id)
if file_id in this_inv:
this_ie = this_inv[file_id]
this_path = this_inv.id2path(file_id)
else:
this_ie = this_path = None
# now we know how it was last time, and how it is in this revision.
# are those two states effectively the same or not?
if not this_ie and not last_ie:
# not present in either
pass
elif this_ie and not last_ie:
yield revno, revision_id, "added " + this_path
elif not this_ie and last_ie:
# deleted here
yield revno, revision_id, "deleted " + last_path
elif this_path != last_path:
yield revno, revision_id, ("renamed %s => %s" % (last_path, this_path))
elif (this_ie.text_size != last_ie.text_size
or this_ie.text_sha1 != last_ie.text_sha1):
yield revno, revision_id, "modified " + this_path
last_ie = this_ie
last_path = this_path
revno += 1
def _enumerate_history(branch):
rh = []
revno = 1
for rev_id in branch.revision_history():
rh.append((revno, rev_id))
revno += 1
return rh
def show_log(branch,
lf,
specific_fileid=None,
verbose=False,
direction='reverse',
start_revision=None,
end_revision=None,
search=None,
limit=None):
"""Write out human-readable log of commits to this branch.
lf
LogFormatter object to show the output.
specific_fileid
If true, list only the commits affecting the specified
file, rather than all commits.
verbose
If true show added/changed/deleted/renamed files.
direction
'reverse' (default) is latest to earliest;
'forward' is earliest to latest.
start_revision
If not None, only show revisions >= start_revision
end_revision
If not None, only show revisions <= end_revision
search
If not None, only show revisions with matching commit messages
limit
If not None or 0, only show limit revisions
"""
branch.lock_read()
try:
if getattr(lf, 'begin_log', None):
lf.begin_log()
_show_log(branch, lf, specific_fileid, verbose, direction,
start_revision, end_revision, search, limit)
if getattr(lf, 'end_log', None):
lf.end_log()
finally:
branch.unlock()
def _show_log(branch,
lf,
specific_fileid=None,
verbose=False,
direction='reverse',
start_revision=None,
end_revision=None,
search=None,
limit=None):
"""Worker function for show_log - see show_log."""
from bzrlib.osutils import format_date
from bzrlib.errors import BzrCheckError
from warnings import warn
if not isinstance(lf, LogFormatter):
warn("not a LogFormatter instance: %r" % lf)
if specific_fileid:
mutter('get log for file_id %r', specific_fileid)
if search is not None:
import re
searchRE = re.compile(search, re.IGNORECASE)
else:
searchRE = None
which_revs = _enumerate_history(branch)
if start_revision is None:
start_revision = 1
else:
branch.check_real_revno(start_revision)
if end_revision is None:
end_revision = len(which_revs)
else:
branch.check_real_revno(end_revision)
# list indexes are 0-based; revisions are 1-based
cut_revs = which_revs[(start_revision-1):(end_revision)]
if not cut_revs:
return
# convert the revision history to a dictionary:
rev_nos = dict((k, v) for v, k in cut_revs)
# override the mainline to look like the revision history.
mainline_revs = [revision_id for index, revision_id in cut_revs]
if cut_revs[0][0] == 1:
mainline_revs.insert(0, None)
else:
mainline_revs.insert(0, which_revs[start_revision-2][1])
legacy_lf = getattr(lf, 'log_revision', None) is None
if legacy_lf:
# pre-0.17 formatters use show for mainline revisions.
# how should we show merged revisions ?
# pre-0.11 api: show_merge
# 0.11-0.16 api: show_merge_revno
show_merge_revno = getattr(lf, 'show_merge_revno', None)
show_merge = getattr(lf, 'show_merge', None)
if show_merge is None and show_merge_revno is None:
# no merged-revno support
generate_merge_revisions = False
else:
generate_merge_revisions = True
# tell developers to update their code
symbol_versioning.warn('LogFormatters should provide log_revision '
'instead of show and show_merge_revno since bzr 0.17.',
DeprecationWarning, stacklevel=3)
else:
generate_merge_revisions = getattr(lf, 'supports_merge_revisions',
False)
view_revs_iter = get_view_revisions(mainline_revs, rev_nos, branch,
direction, include_merges=generate_merge_revisions)
if specific_fileid:
view_revisions = _get_revisions_touching_file_id(branch,
specific_fileid,
mainline_revs,
view_revs_iter)
else:
view_revisions = list(view_revs_iter)
rev_tag_dict = {}
generate_tags = getattr(lf, 'supports_tags', False)
if generate_tags:
if branch.supports_tags():
rev_tag_dict = branch.tags.get_reverse_tag_dict()
generate_delta = verbose and getattr(lf, 'supports_delta', False)
def iter_revisions():
# r = revision, n = revno, d = merge depth
revision_ids = [r for r, n, d in view_revisions]
num = 9
repository = branch.repository
while revision_ids:
cur_deltas = {}
revisions = repository.get_revisions(revision_ids[:num])
if generate_delta:
deltas = repository.get_deltas_for_revisions(revisions)
cur_deltas = dict(izip((r.revision_id for r in revisions),
deltas))
for revision in revisions:
yield revision, cur_deltas.get(revision.revision_id)
revision_ids = revision_ids[num:]
num = min(int(num * 1.5), 200)
# now we just print all the revisions
log_count = 0
for ((rev_id, revno, merge_depth), (rev, delta)) in \
izip(view_revisions, iter_revisions()):
if searchRE:
if not searchRE.search(rev.message):
continue
if not legacy_lf:
lr = LogRevision(rev, revno, merge_depth, delta,
rev_tag_dict.get(rev_id))
lf.log_revision(lr)
else:
# support for legacy (pre-0.17) LogFormatters
if merge_depth == 0:
if generate_tags:
lf.show(revno, rev, delta, rev_tag_dict.get(rev_id))
else:
lf.show(revno, rev, delta)
else:
if show_merge_revno is None:
lf.show_merge(rev, merge_depth)
else:
if generate_tags:
lf.show_merge_revno(rev, merge_depth, revno,
rev_tag_dict.get(rev_id))
else:
lf.show_merge_revno(rev, merge_depth, revno)
if limit:
log_count += 1
if log_count >= limit:
break
def _get_revisions_touching_file_id(branch, file_id, mainline_revisions,
view_revs_iter):
"""Return the list of revision ids which touch a given file id.
This includes the revisions which directly change the file id,
and the revisions which merge these changes. So if the
revision graph is::
A
|\
B C
|/
D
And 'C' changes a file, then both C and D will be returned.
This will also can be restricted based on a subset of the mainline.
:return: A list of (revision_id, dotted_revno, merge_depth) tuples.
"""
# find all the revisions that change the specific file
file_weave = branch.repository.weave_store.get_weave(file_id,
branch.repository.get_transaction())
weave_modifed_revisions = set(file_weave.versions())
# build the ancestry of each revision in the graph
# - only listing the ancestors that change the specific file.
rev_graph = branch.repository.get_revision_graph(mainline_revisions[-1])
sorted_rev_list = topo_sort(rev_graph)
ancestry = {}
for rev in sorted_rev_list:
parents = rev_graph[rev]
if rev not in weave_modifed_revisions and len(parents) == 1:
# We will not be adding anything new, so just use a reference to
# the parent ancestry.
rev_ancestry = ancestry[parents[0]]
else:
rev_ancestry = set()
if rev in weave_modifed_revisions:
rev_ancestry.add(rev)
for parent in parents:
rev_ancestry = rev_ancestry.union(ancestry[parent])
ancestry[rev] = rev_ancestry
def is_merging_rev(r):
parents = rev_graph[r]
if len(parents) > 1:
leftparent = parents[0]
for rightparent in parents[1:]:
if not ancestry[leftparent].issuperset(
ancestry[rightparent]):
return True
return False
# filter from the view the revisions that did not change or merge
# the specific file
return [(r, n, d) for r, n, d in view_revs_iter
if r in weave_modifed_revisions or is_merging_rev(r)]
def get_view_revisions(mainline_revs, rev_nos, branch, direction,
include_merges=True):
"""Produce an iterator of revisions to show
:return: an iterator of (revision_id, revno, merge_depth)
(if there is no revno for a revision, None is supplied)
"""
if include_merges is False:
revision_ids = mainline_revs[1:]
if direction == 'reverse':
revision_ids.reverse()
for revision_id in revision_ids:
yield revision_id, str(rev_nos[revision_id]), 0
return
merge_sorted_revisions = merge_sort(
branch.repository.get_revision_graph(mainline_revs[-1]),
mainline_revs[-1],
mainline_revs,
generate_revno=True)
if direction == 'forward':
# forward means oldest first.
merge_sorted_revisions = reverse_by_depth(merge_sorted_revisions)
elif direction != 'reverse':
raise ValueError('invalid direction %r' % direction)
for sequence, rev_id, merge_depth, revno, end_of_merge in merge_sorted_revisions:
yield rev_id, '.'.join(map(str, revno)), merge_depth
def reverse_by_depth(merge_sorted_revisions, _depth=0):
"""Reverse revisions by depth.
Revisions with a different depth are sorted as a group with the previous
revision of that depth. There may be no topological justification for this,
but it looks much nicer.
"""
zd_revisions = []
for val in merge_sorted_revisions:
if val[2] == _depth:
zd_revisions.append([val])
else:
assert val[2] > _depth
zd_revisions[-1].append(val)
for revisions in zd_revisions:
if len(revisions) > 1:
revisions[1:] = reverse_by_depth(revisions[1:], _depth + 1)
zd_revisions.reverse()
result = []
for chunk in zd_revisions:
result.extend(chunk)
return result
class LogRevision(object):
"""A revision to be logged (by LogFormatter.log_revision).
A simple wrapper for the attributes of a revision to be logged.
The attributes may or may not be populated, as determined by the
logging options and the log formatter capabilities.
"""
def __init__(self, rev=None, revno=None, merge_depth=0, delta=None,
tags=None):
self.rev = rev
self.revno = revno
self.merge_depth = merge_depth
self.delta = delta
self.tags = tags
class LogFormatter(object):
"""Abstract class to display log messages.
At a minimum, a derived class must implement the log_revision method.
If the LogFormatter needs to be informed of the beginning or end of
a log it should implement the begin_log and/or end_log hook methods.
A LogFormatter should define the following supports_XXX flags
to indicate which LogRevision attributes it supports:
- supports_delta must be True if this log formatter supports delta.
Otherwise the delta attribute may not be populated.
- supports_merge_revisions must be True if this log formatter supports
merge revisions. If not, only revisions mainline revisions (those
with merge_depth == 0) will be passed to the formatter.
- supports_tags must be True if this log formatter supports tags.
Otherwise the tags attribute may not be populated.
"""
def __init__(self, to_file, show_ids=False, show_timezone='original'):
self.to_file = to_file
self.show_ids = show_ids
self.show_timezone = show_timezone
# TODO: uncomment this block after show() has been removed.
# Until then defining log_revision would prevent _show_log calling show()
# in legacy formatters.
# def log_revision(self, revision):
# """Log a revision.
#
# :param revision: The LogRevision to be logged.
# """
# raise NotImplementedError('not implemented in abstract base')
@deprecated_method(zero_seventeen)
def show(self, revno, rev, delta):
raise NotImplementedError('not implemented in abstract base')
def short_committer(self, rev):
return re.sub('<.*@.*>', '', rev.committer).strip(' ')
class LongLogFormatter(LogFormatter):
supports_merge_revisions = True
supports_delta = True
supports_tags = True
@deprecated_method(zero_seventeen)
def show(self, revno, rev, delta, tags=None):
lr = LogRevision(rev, revno, 0, delta, tags)
return self.log_revision(lr)
@deprecated_method(zero_eleven)
def show_merge(self, rev, merge_depth):
lr = LogRevision(rev, merge_depth=merge_depth)
return self.log_revision(lr)
@deprecated_method(zero_seventeen)
def show_merge_revno(self, rev, merge_depth, revno, tags=None):
"""Show a merged revision rev, with merge_depth and a revno."""
lr = LogRevision(rev, revno, merge_depth, tags=tags)
return self.log_revision(lr)
def log_revision(self, revision):
"""Log a revision, either merged or not."""
from bzrlib.osutils import format_date
indent = ' '*revision.merge_depth
to_file = self.to_file
print >>to_file, indent+'-' * 60
if revision.revno is not None:
print >>to_file, indent+'revno:', revision.revno
if revision.tags:
print >>to_file, indent+'tags: %s' % (', '.join(revision.tags))
if self.show_ids:
print >>to_file, indent+'revision-id:', revision.rev.revision_id
for parent_id in revision.rev.parent_ids:
print >>to_file, indent+'parent:', parent_id
print >>to_file, indent+'committer:', revision.rev.committer
try:
print >>to_file, indent+'branch nick: %s' % \
revision.rev.properties['branch-nick']
except KeyError:
pass
date_str = format_date(revision.rev.timestamp,
revision.rev.timezone or 0,
self.show_timezone)
print >>to_file, indent+'timestamp: %s' % date_str
print >>to_file, indent+'message:'
if not revision.rev.message:
print >>to_file, indent+' (no message)'
else:
message = revision.rev.message.rstrip('\r\n')
for l in message.split('\n'):
print >>to_file, indent+' ' + l
if revision.delta is not None:
revision.delta.show(to_file, self.show_ids, indent=indent)
class ShortLogFormatter(LogFormatter):
supports_delta = True
@deprecated_method(zero_seventeen)
def show(self, revno, rev, delta):
lr = LogRevision(rev, revno, 0, delta)
return self.log_revision(lr)
def log_revision(self, revision):
from bzrlib.osutils import format_date
to_file = self.to_file
date_str = format_date(revision.rev.timestamp,
revision.rev.timezone or 0,
self.show_timezone)
is_merge = ''
if len(revision.rev.parent_ids) > 1:
is_merge = ' [merge]'
print >>to_file, "%5s %s\t%s%s" % (revision.revno,
self.short_committer(revision.rev),
format_date(revision.rev.timestamp,
revision.rev.timezone or 0,
self.show_timezone, date_fmt="%Y-%m-%d",
show_offset=False),
is_merge)
if self.show_ids:
print >>to_file, ' revision-id:', revision.rev.revision_id
if not revision.rev.message:
print >>to_file, ' (no message)'
else:
message = revision.rev.message.rstrip('\r\n')
for l in message.split('\n'):
print >>to_file, ' ' + l
# TODO: Why not show the modified files in a shorter form as
# well? rewrap them single lines of appropriate length
if revision.delta is not None:
revision.delta.show(to_file, self.show_ids)
print >>to_file, ''
class LineLogFormatter(LogFormatter):
def __init__(self, *args, **kwargs):
from bzrlib.osutils import terminal_width
super(LineLogFormatter, self).__init__(*args, **kwargs)
self._max_chars = terminal_width() - 1
def truncate(self, str, max_len):
if len(str) <= max_len:
return str
return str[:max_len-3]+'...'
def date_string(self, rev):
from bzrlib.osutils import format_date
return format_date(rev.timestamp, rev.timezone or 0,
self.show_timezone, date_fmt="%Y-%m-%d",
show_offset=False)
def message(self, rev):
if not rev.message:
return '(no message)'
else:
return rev.message
@deprecated_method(zero_seventeen)
def show(self, revno, rev, delta):
from bzrlib.osutils import terminal_width
print >> self.to_file, self.log_string(revno, rev, terminal_width()-1)
def log_revision(self, revision):
print >>self.to_file, self.log_string(revision.revno, revision.rev,
self._max_chars)
def log_string(self, revno, rev, max_chars):
"""Format log info into one string. Truncate tail of string
:param revno: revision number (int) or None.
Revision numbers counts from 1.
:param rev: revision info object
:param max_chars: maximum length of resulting string
:return: formatted truncated string
"""
out = []
if revno:
# show revno only when is not None
out.append("%s:" % revno)
out.append(self.truncate(self.short_committer(rev), 20))
out.append(self.date_string(rev))
out.append(rev.get_summary())
return self.truncate(" ".join(out).rstrip('\n'), max_chars)
def line_log(rev, max_chars):
lf = LineLogFormatter(None)
return lf.log_string(None, rev, max_chars)
class LogFormatterRegistry(registry.Registry):
"""Registry for log formatters"""
def make_formatter(self, name, *args, **kwargs):
"""Construct a formatter from arguments.
:param name: Name of the formatter to construct. 'short', 'long' and
'line' are built-in.
"""
return self.get(name)(*args, **kwargs)
def get_default(self, branch):
return self.get(branch.get_config().log_format())
log_formatter_registry = LogFormatterRegistry()
log_formatter_registry.register('short', ShortLogFormatter,
'Moderately short log format')
log_formatter_registry.register('long', LongLogFormatter,
'Detailed log format')
log_formatter_registry.register('line', LineLogFormatter,
'Log format with one line per revision')
def register_formatter(name, formatter):
log_formatter_registry.register(name, formatter)
def log_formatter(name, *args, **kwargs):
"""Construct a formatter from arguments.
name -- Name of the formatter to construct; currently 'long', 'short' and
'line' are supported.
"""
from bzrlib.errors import BzrCommandError
try:
return log_formatter_registry.make_formatter(name, *args, **kwargs)
except KeyError:
raise BzrCommandError("unknown log formatter: %r" % name)
def show_one_log(revno, rev, delta, verbose, to_file, show_timezone):
# deprecated; for compatibility
lf = LongLogFormatter(to_file=to_file, show_timezone=show_timezone)
lf.show(revno, rev, delta)
def show_changed_revisions(branch, old_rh, new_rh, to_file=None, log_format='long'):
"""Show the change in revision history comparing the old revision history to the new one.
:param branch: The branch where the revisions exist
:param old_rh: The old revision history
:param new_rh: The new revision history
:param to_file: A file to write the results to. If None, stdout will be used
"""
if to_file is None:
import sys
import codecs
import bzrlib
to_file = codecs.getwriter(bzrlib.user_encoding)(sys.stdout, errors='replace')
lf = log_formatter(log_format,
show_ids=False,
to_file=to_file,
show_timezone='original')
# This is the first index which is different between
# old and new
base_idx = None
for i in xrange(max(len(new_rh),
len(old_rh))):
if (len(new_rh) <= i
or len(old_rh) <= i
or new_rh[i] != old_rh[i]):
base_idx = i
break
if base_idx is None:
to_file.write('Nothing seems to have changed\n')
return
## TODO: It might be nice to do something like show_log
## and show the merged entries. But since this is the
## removed revisions, it shouldn't be as important
if base_idx < len(old_rh):
to_file.write('*'*60)
to_file.write('\nRemoved Revisions:\n')
for i in range(base_idx, len(old_rh)):
rev = branch.repository.get_revision(old_rh[i])
lr = LogRevision(rev, i+1, 0, None)
lf.log_revision(lr)
to_file.write('*'*60)
to_file.write('\n\n')
if base_idx < len(new_rh):
to_file.write('Added Revisions:\n')
show_log(branch,
lf,
None,
verbose=True,
direction='forward',
start_revision=base_idx+1,
end_revision=len(new_rh),
search=None)
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