128
200
diffcmd.extend(diff_opts)
130
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
202
pipe = _spawn_external_diff(diffcmd, capture_errors=True)
203
out,err = pipe.communicate()
132
if rc != 0 and rc != 1:
206
# internal_diff() adds a trailing newline, add one here for consistency
209
# 'diff' gives retcode == 2 for all sorts of errors
210
# one of those is 'Binary files differ'.
211
# Bad options could also be the problem.
212
# 'Binary files' is not a real error, so we suppress that error.
215
# Since we got here, we want to make sure to give an i18n error
216
pipe = _spawn_external_diff(diffcmd, capture_errors=False)
217
out, err = pipe.communicate()
219
# Write out the new i18n diff response
220
to_file.write(out+'\n')
221
if pipe.returncode != 2:
222
raise errors.BzrError(
223
'external diff failed with exit code 2'
224
' when run with LANG=C and LC_ALL=C,'
225
' but not when run natively: %r' % (diffcmd,))
227
first_line = lang_c_out.split('\n', 1)[0]
228
# Starting with diffutils 2.8.4 the word "binary" was dropped.
229
m = re.match('^(binary )?files.*differ$', first_line, re.I)
231
raise errors.BzrError('external diff failed with exit code 2;'
232
' command: %r' % (diffcmd,))
234
# Binary files differ, just return
237
# If we got to here, we haven't written out the output of diff
133
241
# returns 1 if files differ; that's OK
135
243
msg = 'signal %d' % (-rc)
137
245
msg = 'exit code %d' % rc
139
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
247
raise errors.BzrError('external diff failed with %s; command: %r'
141
252
oldtmpf.close() # and delete
144
def show_diff(b, from_spec, specific_files, external_diff_options=None,
145
revision2=None, output=None, b2=None):
146
"""Shortcut for showing the diff to the working tree.
152
None for 'basis tree', or otherwise the old revision to compare against.
254
# Clean up. Warn in case the files couldn't be deleted
255
# (in case windows still holds the file open, but not
256
# if the files have already been deleted)
258
os.remove(old_abspath)
260
if e.errno not in (errno.ENOENT,):
261
warning('Failed to delete temporary file: %s %s',
264
os.remove(new_abspath)
266
if e.errno not in (errno.ENOENT,):
267
warning('Failed to delete temporary file: %s %s',
271
def diff_cmd_helper(tree, specific_files, external_diff_options,
272
old_revision_spec=None, new_revision_spec=None,
274
old_label='a/', new_label='b/'):
275
"""Helper for cmd_diff.
280
:param specific_files:
281
The specific files to compare, or None
283
:param external_diff_options:
284
If non-None, run an external diff, and pass it these options
286
:param old_revision_spec:
287
If None, use basis tree as old revision, otherwise use the tree for
288
the specified revision.
290
:param new_revision_spec:
291
If None, use working tree as new revision, otherwise use the tree for
292
the specified revision.
294
:param revision_specs:
295
Zero, one or two RevisionSpecs from the command line, saying what revisions
296
to compare. This can be passed as an alternative to the old_revision_spec
297
and new_revision_spec parameters.
154
299
The more general form is show_diff_trees(), where the caller
155
300
supplies any two trees.
161
if from_spec is None:
163
old_tree = b.basis_tree()
165
old_tree = b.working_tree()
167
old_tree = b.revision_tree(from_spec.in_history(b).rev_id)
169
if revision2 is None:
171
new_tree = b.working_tree()
173
new_tree = b2.working_tree()
175
new_tree = b.revision_tree(revision2.in_history(b).rev_id)
177
return show_diff_trees(old_tree, new_tree, output, specific_files,
178
external_diff_options)
303
# TODO: perhaps remove the old parameters old_revision_spec and
304
# new_revision_spec, since this is only really for use from cmd_diff and
305
# it now always passes through a sequence of revision_specs -- mbp
310
revision = spec.in_store(tree.branch)
312
revision = spec.in_store(None)
313
revision_id = revision.rev_id
314
branch = revision.branch
315
return branch.repository.revision_tree(revision_id)
317
if revision_specs is not None:
318
assert (old_revision_spec is None
319
and new_revision_spec is None)
320
if len(revision_specs) > 0:
321
old_revision_spec = revision_specs[0]
322
if len(revision_specs) > 1:
323
new_revision_spec = revision_specs[1]
325
if old_revision_spec is None:
326
old_tree = tree.basis_tree()
328
old_tree = spec_tree(old_revision_spec)
330
if (new_revision_spec is None
331
or new_revision_spec.spec is None):
334
new_tree = spec_tree(new_revision_spec)
336
if new_tree is not tree:
337
extra_trees = (tree,)
341
return show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
342
external_diff_options,
343
old_label=old_label, new_label=new_label,
344
extra_trees=extra_trees)
182
347
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
183
external_diff_options=None):
348
external_diff_options=None,
349
old_label='a/', new_label='b/',
351
path_encoding='utf8'):
184
352
"""Show in text form the changes from one tree to another.
189
357
external_diff_options
190
358
If set, use an external GNU diff and pass these options.
193
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
197
DEVNULL = '/dev/null'
198
# Windows users, don't panic about this filename -- it is a
199
# special signal to GNU patch that the file should be created or
200
# deleted respectively.
202
# TODO: Generation of pseudo-diffs for added/deleted files could
203
# be usefully made into a much faster special case.
205
if external_diff_options:
206
assert isinstance(external_diff_options, basestring)
207
opts = external_diff_options.split()
208
def diff_file(olab, olines, nlab, nlines, to_file):
209
external_diff(olab, olines, nlab, nlines, to_file, opts)
211
diff_file = internal_diff
214
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
215
specific_files=specific_files)
218
for path, file_id, kind in delta.removed:
220
print >>to_file, '=== removed %s %r' % (kind, path)
221
old_tree.inventory[file_id].diff(diff_file, old_label + path, old_tree,
222
DEVNULL, None, None, to_file)
223
for path, file_id, kind in delta.added:
225
print >>to_file, '=== added %s %r' % (kind, path)
226
new_tree.inventory[file_id].diff(diff_file, new_label + path, new_tree,
227
DEVNULL, None, None, to_file,
229
for (old_path, new_path, file_id, kind,
230
text_modified, meta_modified) in delta.renamed:
232
prop_str = get_prop_change(meta_modified)
233
print >>to_file, '=== renamed %s %r => %r%s' % (
234
kind, old_path, new_path, prop_str)
235
_maybe_diff_file_or_symlink(old_label, old_path, old_tree, file_id,
236
new_label, new_path, new_tree,
237
text_modified, kind, to_file, diff_file)
238
for path, file_id, kind, text_modified, meta_modified in delta.modified:
240
prop_str = get_prop_change(meta_modified)
241
print >>to_file, '=== modified %s %r%s' % (kind, path, prop_str)
243
_maybe_diff_file_or_symlink(old_label, path, old_tree, file_id,
244
new_label, path, new_tree,
245
True, kind, to_file, diff_file)
361
If set, more Trees to use for looking up file ids
364
If set, the path will be encoded as specified, otherwise is supposed
369
if extra_trees is not None:
370
for tree in extra_trees:
374
differ = DiffTree.from_trees_options(old_tree, new_tree, to_file,
376
external_diff_options,
377
old_label, new_label)
378
return differ.show_diff(specific_files, extra_trees)
381
if extra_trees is not None:
382
for tree in extra_trees:
388
def _patch_header_date(tree, file_id, path):
389
"""Returns a timestamp suitable for use in a patch header."""
390
mtime = tree.get_file_mtime(file_id, path)
391
assert mtime is not None, \
392
"got an mtime of None for file-id %s, path %s in tree %s" % (
394
return timestamp.format_patch_date(mtime)
397
def _raise_if_nonexistent(paths, old_tree, new_tree):
398
"""Complain if paths are not in either inventory or tree.
400
It's OK with the files exist in either tree's inventory, or
401
if they exist in the tree but are not versioned.
403
This can be used by operations such as bzr status that can accept
404
unknown or ignored files.
406
mutter("check paths: %r", paths)
409
s = old_tree.filter_unversioned_files(paths)
410
s = new_tree.filter_unversioned_files(s)
411
s = [path for path in s if not new_tree.has_filename(path)]
413
raise errors.PathsDoNotExist(sorted(s))
249
416
def get_prop_change(meta_modified):
250
417
if meta_modified:
256
def _maybe_diff_file_or_symlink(old_label, old_path, old_tree, file_id,
257
new_label, new_path, new_tree, text_modified,
258
kind, to_file, diff_file):
260
new_entry = new_tree.inventory[file_id]
261
old_tree.inventory[file_id].diff(diff_file,
262
old_label + old_path, old_tree,
263
new_label + new_path, new_entry,
423
class DiffPath(object):
424
"""Base type for command object that compare files"""
426
# The type or contents of the file were unsuitable for diffing
427
CANNOT_DIFF = 'CANNOT_DIFF'
428
# The file has changed in a semantic way
430
# The file content may have changed, but there is no semantic change
431
UNCHANGED = 'UNCHANGED'
433
def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8'):
436
:param old_tree: The tree to show as the old tree in the comparison
437
:param new_tree: The tree to show as new in the comparison
438
:param to_file: The file to write comparison data to
439
:param path_encoding: The character encoding to write paths in
441
self.old_tree = old_tree
442
self.new_tree = new_tree
443
self.to_file = to_file
444
self.path_encoding = path_encoding
447
def from_diff_tree(klass, diff_tree):
448
return klass(diff_tree.old_tree, diff_tree.new_tree,
449
diff_tree.to_file, diff_tree.path_encoding)
452
def _diff_many(differs, file_id, old_path, new_path, old_kind, new_kind):
453
for file_differ in differs:
454
result = file_differ.diff(file_id, old_path, new_path, old_kind,
456
if result is not DiffPath.CANNOT_DIFF:
459
return DiffPath.CANNOT_DIFF
462
class DiffKindChange(object):
463
"""Special differ for file kind changes.
465
Represents kind change as deletion + creation. Uses the other differs
468
def __init__(self, differs):
469
self.differs = differs
472
def from_diff_tree(klass, diff_tree):
473
return klass(diff_tree.differs)
475
def diff(self, file_id, old_path, new_path, old_kind, new_kind):
476
"""Perform comparison
478
:param file_id: The file_id of the file to compare
479
:param old_path: Path of the file in the old tree
480
:param new_path: Path of the file in the new tree
481
:param old_kind: Old file-kind of the file
482
:param new_kind: New file-kind of the file
484
if None in (old_kind, new_kind):
485
return DiffPath.CANNOT_DIFF
486
result = DiffPath._diff_many(self.differs, file_id, old_path,
487
new_path, old_kind, None)
488
if result is DiffPath.CANNOT_DIFF:
490
return DiffPath._diff_many(self.differs, file_id, old_path, new_path,
494
class DiffDirectory(DiffPath):
496
def diff(self, file_id, old_path, new_path, old_kind, new_kind):
497
"""Perform comparison between two directories. (dummy)
500
if 'directory' not in (old_kind, new_kind):
501
return self.CANNOT_DIFF
502
if old_kind not in ('directory', None):
503
return self.CANNOT_DIFF
504
if new_kind not in ('directory', None):
505
return self.CANNOT_DIFF
509
class DiffSymlink(DiffPath):
511
def diff(self, file_id, old_path, new_path, old_kind, new_kind):
512
"""Perform comparison between two symlinks
514
:param file_id: The file_id of the file to compare
515
:param old_path: Path of the file in the old tree
516
:param new_path: Path of the file in the new tree
517
:param old_kind: Old file-kind of the file
518
:param new_kind: New file-kind of the file
520
if 'symlink' not in (old_kind, new_kind):
521
return self.CANNOT_DIFF
522
if old_kind == 'symlink':
523
old_target = self.old_tree.get_symlink_target(file_id)
524
elif old_kind is None:
527
return self.CANNOT_DIFF
528
if new_kind == 'symlink':
529
new_target = self.new_tree.get_symlink_target(file_id)
530
elif new_kind is None:
533
return self.CANNOT_DIFF
534
return self.diff_symlink(old_target, new_target)
536
def diff_symlink(self, old_target, new_target):
537
if old_target is None:
538
self.to_file.write('=== target is %r\n' % new_target)
539
elif new_target is None:
540
self.to_file.write('=== target was %r\n' % old_target)
542
self.to_file.write('=== target changed %r => %r\n' %
543
(old_target, new_target))
547
class DiffText(DiffPath):
549
# GNU Patch uses the epoch date to detect files that are being added
550
# or removed in a diff.
551
EPOCH_DATE = '1970-01-01 00:00:00 +0000'
553
def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',
554
old_label='', new_label='', text_differ=internal_diff):
555
DiffPath.__init__(self, old_tree, new_tree, to_file, path_encoding)
556
self.text_differ = text_differ
557
self.old_label = old_label
558
self.new_label = new_label
559
self.path_encoding = path_encoding
561
def diff(self, file_id, old_path, new_path, old_kind, new_kind):
562
"""Compare two files in unified diff format
564
:param file_id: The file_id of the file to compare
565
:param old_path: Path of the file in the old tree
566
:param new_path: Path of the file in the new tree
567
:param old_kind: Old file-kind of the file
568
:param new_kind: New file-kind of the file
570
if 'file' not in (old_kind, new_kind):
571
return self.CANNOT_DIFF
572
from_file_id = to_file_id = file_id
573
if old_kind == 'file':
574
old_date = _patch_header_date(self.old_tree, file_id, old_path)
575
elif old_kind is None:
576
old_date = self.EPOCH_DATE
579
return self.CANNOT_DIFF
580
if new_kind == 'file':
581
new_date = _patch_header_date(self.new_tree, file_id, new_path)
582
elif new_kind is None:
583
new_date = self.EPOCH_DATE
586
return self.CANNOT_DIFF
587
from_label = '%s%s\t%s' % (self.old_label, old_path, old_date)
588
to_label = '%s%s\t%s' % (self.new_label, new_path, new_date)
589
return self.diff_text(from_file_id, to_file_id, from_label, to_label)
591
def diff_text(self, from_file_id, to_file_id, from_label, to_label):
592
"""Diff the content of given files in two trees
594
:param from_file_id: The id of the file in the from tree. If None,
595
the file is not present in the from tree.
596
:param to_file_id: The id of the file in the to tree. This may refer
597
to a different file from from_file_id. If None,
598
the file is not present in the to tree.
600
def _get_text(tree, file_id):
601
if file_id is not None:
602
return tree.get_file(file_id).readlines()
606
from_text = _get_text(self.old_tree, from_file_id)
607
to_text = _get_text(self.new_tree, to_file_id)
608
self.text_differ(from_label, from_text, to_label, to_text,
610
except errors.BinaryFile:
612
("Binary files %s and %s differ\n" %
613
(from_label, to_label)).encode(self.path_encoding))
617
class DiffTree(object):
618
"""Provides textual representations of the difference between two trees.
620
A DiffTree examines two trees and where a file-id has altered
621
between them, generates a textual representation of the difference.
622
DiffTree uses a sequence of DiffPath objects which are each
623
given the opportunity to handle a given altered fileid. The list
624
of DiffPath objects can be extended globally by appending to
625
DiffTree.diff_factories, or for a specific diff operation by
626
supplying the extra_factories option to the appropriate method.
629
# list of factories that can provide instances of DiffPath objects
630
# may be extended by plugins.
631
diff_factories = [DiffSymlink.from_diff_tree,
632
DiffDirectory.from_diff_tree]
634
def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',
635
diff_text=None, extra_factories=None):
638
:param old_tree: Tree to show as old in the comparison
639
:param new_tree: Tree to show as new in the comparison
640
:param to_file: File to write comparision to
641
:param path_encoding: Character encoding to write paths in
642
:param diff_text: DiffPath-type object to use as a last resort for
644
:param extra_factories: Factories of DiffPaths to try before any other
646
if diff_text is None:
647
diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
648
'', '', internal_diff)
649
self.old_tree = old_tree
650
self.new_tree = new_tree
651
self.to_file = to_file
652
self.path_encoding = path_encoding
654
if extra_factories is not None:
655
self.differs.extend(f(self) for f in extra_factories)
656
self.differs.extend(f(self) for f in self.diff_factories)
657
self.differs.extend([diff_text, DiffKindChange.from_diff_tree(self)])
660
def from_trees_options(klass, old_tree, new_tree, to_file,
661
path_encoding, external_diff_options, old_label,
663
"""Factory for producing a DiffTree.
665
Designed to accept options used by show_diff_trees.
666
:param old_tree: The tree to show as old in the comparison
667
:param new_tree: The tree to show as new in the comparison
668
:param to_file: File to write comparisons to
669
:param path_encoding: Character encoding to use for writing paths
670
:param external_diff_options: If supplied, use the installed diff
671
binary to perform file comparison, using supplied options.
672
:param old_label: Prefix to use for old file labels
673
:param new_label: Prefix to use for new file labels
675
if external_diff_options:
676
assert isinstance(external_diff_options, basestring)
677
opts = external_diff_options.split()
678
def diff_file(olab, olines, nlab, nlines, to_file):
679
external_diff(olab, olines, nlab, nlines, to_file, opts)
681
diff_file = internal_diff
682
diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
683
old_label, new_label, diff_file)
684
return klass(old_tree, new_tree, to_file, path_encoding, diff_text)
686
def show_diff(self, specific_files, extra_trees=None):
687
"""Write tree diff to self.to_file
689
:param sepecific_files: the specific files to compare (recursive)
690
:param extra_trees: extra trees to use for mapping paths to file_ids
692
# TODO: Generation of pseudo-diffs for added/deleted files could
693
# be usefully made into a much faster special case.
695
delta = self.new_tree.changes_from(self.old_tree,
696
specific_files=specific_files,
697
extra_trees=extra_trees, require_versioned=True)
700
for path, file_id, kind in delta.removed:
702
path_encoded = path.encode(self.path_encoding, "replace")
703
self.to_file.write("=== removed %s '%s'\n" % (kind, path_encoded))
704
self.diff(file_id, path, path)
706
for path, file_id, kind in delta.added:
708
path_encoded = path.encode(self.path_encoding, "replace")
709
self.to_file.write("=== added %s '%s'\n" % (kind, path_encoded))
710
self.diff(file_id, path, path)
711
for (old_path, new_path, file_id, kind,
712
text_modified, meta_modified) in delta.renamed:
714
prop_str = get_prop_change(meta_modified)
715
oldpath_encoded = old_path.encode(self.path_encoding, "replace")
716
newpath_encoded = new_path.encode(self.path_encoding, "replace")
717
self.to_file.write("=== renamed %s '%s' => '%s'%s\n" % (kind,
718
oldpath_encoded, newpath_encoded, prop_str))
720
self.diff(file_id, old_path, new_path)
721
for path, file_id, kind, text_modified, meta_modified in\
724
prop_str = get_prop_change(meta_modified)
725
path_encoded = path.encode(self.path_encoding, "replace")
726
self.to_file.write("=== modified %s '%s'%s\n" % (kind,
727
path_encoded, prop_str))
728
# The file may be in a different location in the old tree (because
729
# the containing dir was renamed, but the file itself was not)
731
old_path = self.old_tree.id2path(file_id)
732
self.diff(file_id, old_path, path)
735
def diff(self, file_id, old_path, new_path):
736
"""Perform a diff of a single file
738
:param file_id: file-id of the file
739
:param old_path: The path of the file in the old tree
740
:param new_path: The path of the file in the new tree
743
old_kind = self.old_tree.kind(file_id)
744
except errors.NoSuchId:
747
new_kind = self.new_tree.kind(file_id)
748
except errors.NoSuchId:
751
result = DiffPath._diff_many(self.differs, file_id, old_path,
752
new_path, old_kind, new_kind)
753
if result is DiffPath.CANNOT_DIFF:
754
error_path = new_path
755
if error_path is None:
756
error_path = old_path
757
raise errors.NoDiffFound(error_path)
added
removed
bzrlib/diff.py
