~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
# Copyright (C) 2005 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
from bzrlib.trace import mutter
from bzrlib.tsort import merge_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):
    """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
    """
    branch.lock_read()
    try:
        _show_log(branch, lf, specific_fileid, verbose, direction,
                  start_revision, end_revision, search)
    finally:
        branch.unlock()
    
def _show_log(branch,
             lf,
             specific_fileid=None,
             verbose=False,
             direction='reverse',
             start_revision=None,
             end_revision=None,
             search=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])
    # how should we show merged revisions ?
    # old api: show_merge. New 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
        include_merges = False
    else:
        include_merges = True
    if show_merge is not None and show_merge_revno is None:
        # tell developers to update their code
        symbol_versioning.warn('LogFormatters should provide show_merge_revno '
            'instead of show_merge since bzr 0.11.',
            DeprecationWarning, stacklevel=3)
    view_revisions = list(get_view_revisions(mainline_revs, rev_nos, branch,
                          direction, include_merges=include_merges))

    use_tags = getattr(lf, 'supports_tags', False)
    if use_tags:
        rev_tag_dict = {}
        if branch.supports_tags():
            rev_tag_dict = branch.tags.get_reverse_tag_dict()

    def iter_revisions():
        # r = revision, n = revno, d = merge depth
        revision_ids = [r for r, n, d in view_revisions]
        zeros = set(r for r, n, d in view_revisions if d == 0)
        num = 9
        repository = branch.repository
        while revision_ids:
            cur_deltas = {}
            revisions = repository.get_revisions(revision_ids[:num])
            if verbose or specific_fileid:
                delta_revisions = [r for r in revisions if
                                   r.revision_id in zeros]
                deltas = repository.get_deltas_for_revisions(delta_revisions)
                cur_deltas = dict(izip((r.revision_id for r in 
                                        delta_revisions), deltas))
            for revision in revisions:
                # The delta value will be None unless
                # 1. verbose or specific_fileid is specified, and
                # 2. the revision is a mainline revision
                yield revision, cur_deltas.get(revision.revision_id)
            revision_ids  = revision_ids[num:]
            num = int(num * 1.5)
            
    # now we just print all the revisions
    for ((rev_id, revno, merge_depth), (rev, delta)) in \
         izip(view_revisions, iter_revisions()):

        if searchRE:
            if not searchRE.search(rev.message):
                continue

        if merge_depth == 0:
            # a mainline revision.

            if specific_fileid:
                if not delta.touches_file_id(specific_fileid):
                    continue

            if not verbose:
                # although we calculated it, throw it away without display
                delta = None

            if use_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 use_tags:
                    lf.show_merge_revno(rev, merge_depth, revno,
                                        rev_tag_dict.get(rev_id))
                else:
                    lf.show_merge_revno(rev, merge_depth, revno)


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 LogFormatter(object):
    """Abstract class to display log messages."""

    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

    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_tags = True    # must exist and be True
                            # if this log formatter support tags.
                            # .show() and .show_merge_revno() must then accept
                            # the 'tags'-argument with list of tags

    def show(self, revno, rev, delta, tags=None):
        return self._show_helper(revno=revno, rev=rev, delta=delta, tags=tags)

    @deprecated_method(zero_eleven)
    def show_merge(self, rev, merge_depth):
        return self._show_helper(rev=rev, indent='    '*merge_depth,
                                 merged=True, delta=None)

    def show_merge_revno(self, rev, merge_depth, revno, tags=None):
        """Show a merged revision rev, with merge_depth and a revno."""
        return self._show_helper(rev=rev, revno=revno,
            indent='    '*merge_depth, merged=True, delta=None, tags=tags)

    def _show_helper(self, rev=None, revno=None, indent='', merged=False,
                     delta=None, tags=None):
        """Show a revision, either merged or not."""
        from bzrlib.osutils import format_date
        to_file = self.to_file
        print >>to_file,  indent+'-' * 60
        if revno is not None:
            print >>to_file,  indent+'revno:', revno
        if tags:
            print >>to_file, indent+'tags: %s' % (', '.join(tags))
        if merged:
            print >>to_file,  indent+'merged:', rev.revision_id
        elif self.show_ids:
            print >>to_file,  indent+'revision-id:', rev.revision_id
        if self.show_ids:
            for parent_id in rev.parent_ids:
                print >>to_file, indent+'parent:', parent_id
        print >>to_file,  indent+'committer:', rev.committer

        try:
            print >>to_file, indent+'branch nick: %s' % \
                rev.properties['branch-nick']
        except KeyError:
            pass
        date_str = format_date(rev.timestamp,
                               rev.timezone or 0,
                               self.show_timezone)
        print >>to_file,  indent+'timestamp: %s' % date_str

        print >>to_file,  indent+'message:'
        if not rev.message:
            print >>to_file,  indent+'  (no message)'
        else:
            message = rev.message.rstrip('\r\n')
            for l in message.split('\n'):
                print >>to_file,  indent+'  ' + l
        if delta is not None:
            delta.show(to_file, self.show_ids)


class ShortLogFormatter(LogFormatter):
    def show(self, revno, rev, delta):
        from bzrlib.osutils import format_date

        to_file = self.to_file
        date_str = format_date(rev.timestamp, rev.timezone or 0,
                            self.show_timezone)
        print >>to_file, "%5s %s\t%s" % (revno, self.short_committer(rev),
                format_date(rev.timestamp, rev.timezone or 0,
                            self.show_timezone, date_fmt="%Y-%m-%d",
                           show_offset=False))
        if self.show_ids:
            print >>to_file,  '      revision-id:', rev.revision_id
        if not rev.message:
            print >>to_file,  '      (no message)'
        else:
            message = 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 delta is not None:
            delta.show(to_file, self.show_ids)
        print >>to_file, ''


class LineLogFormatter(LogFormatter):
    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

    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_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])
            lf.show(i+1, rev, None)
        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)