41
66
# both sequences are empty.
42
67
if not oldlines and not newlines:
47
if oldlines and (oldlines[-1][-1] != '\n'):
50
if newlines and (newlines[-1][-1] != '\n'):
54
ud = difflib.unified_diff(oldlines, newlines,
55
fromfile=old_label, tofile=new_label)
70
if allow_binary is False:
71
textfile.check_text_lines(oldlines)
72
textfile.check_text_lines(newlines)
74
if sequence_matcher is None:
75
sequence_matcher = patiencediff.PatienceSequenceMatcher
76
ud = patiencediff.unified_diff(oldlines, newlines,
77
fromfile=old_filename.encode(path_encoding),
78
tofile=new_filename.encode(path_encoding),
79
sequencematcher=sequence_matcher)
57
82
# work-around for difflib being too smart for its own good
58
83
# if /dev/null is "1,0", patch won't recognize it as /dev/null
61
85
ud[2] = ud[2].replace('-1,0', '-0,0')
64
87
ud[2] = ud[2].replace('+1,0', '+0,0')
88
# work around for difflib emitting random spaces after the label
89
ud[0] = ud[0][:-2] + '\n'
90
ud[1] = ud[1][:-2] + '\n'
67
93
to_file.write(line)
69
print >>to_file, "\\ No newline at end of file"
94
if not line.endswith('\n'):
95
to_file.write("\n\\ No newline at end of file\n")
75
def external_diff(old_label, oldlines, new_label, newlines, to_file,
99
def _spawn_external_diff(diffcmd, capture_errors=True):
100
"""Spawn the externall diff process, and return the child handle.
102
:param diffcmd: The command list to spawn
103
:param capture_errors: Capture stderr as well as setting LANG=C
104
and LC_ALL=C. This lets us read and understand the output of diff,
105
and respond to any errors.
106
:return: A Popen object.
109
# construct minimal environment
111
path = os.environ.get('PATH')
114
env['LANGUAGE'] = 'C' # on win32 only LANGUAGE has effect
117
stderr = subprocess.PIPE
123
pipe = subprocess.Popen(diffcmd,
124
stdin=subprocess.PIPE,
125
stdout=subprocess.PIPE,
129
if e.errno == errno.ENOENT:
130
raise errors.NoDiff(str(e))
136
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
77
138
"""Display a diff by calling out to the external diff program."""
80
if to_file != sys.stdout:
81
raise NotImplementedError("sorry, can't send external diff other than to stdout yet",
84
139
# make sure our own output is properly ordered before the diff
87
from tempfile import NamedTemporaryFile
90
oldtmpf = NamedTemporaryFile()
91
newtmpf = NamedTemporaryFile()
142
oldtmp_fd, old_abspath = tempfile.mkstemp(prefix='bzr-diff-old-')
143
newtmp_fd, new_abspath = tempfile.mkstemp(prefix='bzr-diff-new-')
144
oldtmpf = os.fdopen(oldtmp_fd, 'wb')
145
newtmpf = os.fdopen(newtmp_fd, 'wb')
94
148
# TODO: perhaps a special case for comparing to or from the empty
137
193
diffcmd.extend(diff_opts)
139
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
195
pipe = _spawn_external_diff(diffcmd, capture_errors=True)
196
out,err = pipe.communicate()
141
if rc != 0 and rc != 1:
199
# internal_diff() adds a trailing newline, add one here for consistency
202
# 'diff' gives retcode == 2 for all sorts of errors
203
# one of those is 'Binary files differ'.
204
# Bad options could also be the problem.
205
# 'Binary files' is not a real error, so we suppress that error.
208
# Since we got here, we want to make sure to give an i18n error
209
pipe = _spawn_external_diff(diffcmd, capture_errors=False)
210
out, err = pipe.communicate()
212
# Write out the new i18n diff response
213
to_file.write(out+'\n')
214
if pipe.returncode != 2:
215
raise errors.BzrError(
216
'external diff failed with exit code 2'
217
' when run with LANG=C and LC_ALL=C,'
218
' but not when run natively: %r' % (diffcmd,))
220
first_line = lang_c_out.split('\n', 1)[0]
221
# Starting with diffutils 2.8.4 the word "binary" was dropped.
222
m = re.match('^(binary )?files.*differ$', first_line, re.I)
224
raise errors.BzrError('external diff failed with exit code 2;'
225
' command: %r' % (diffcmd,))
227
# Binary files differ, just return
230
# If we got to here, we haven't written out the output of diff
142
234
# returns 1 if files differ; that's OK
144
236
msg = 'signal %d' % (-rc)
146
238
msg = 'exit code %d' % rc
148
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
240
raise errors.BzrError('external diff failed with %s; command: %r'
150
245
oldtmpf.close() # and delete
155
def show_diff(b, revision, specific_files, external_diff_options=None):
247
# Clean up. Warn in case the files couldn't be deleted
248
# (in case windows still holds the file open, but not
249
# if the files have already been deleted)
251
os.remove(old_abspath)
253
if e.errno not in (errno.ENOENT,):
254
warning('Failed to delete temporary file: %s %s',
257
os.remove(new_abspath)
259
if e.errno not in (errno.ENOENT,):
260
warning('Failed to delete temporary file: %s %s',
264
@deprecated_function(zero_eight)
265
def show_diff(b, from_spec, specific_files, external_diff_options=None,
266
revision2=None, output=None, b2=None):
156
267
"""Shortcut for showing the diff to the working tree.
269
Please use show_diff_trees instead.
162
None for each, or otherwise the old revision to compare against.
164
The more general form is show_diff_trees(), where the caller
165
supplies any two trees.
170
old_tree = b.basis_tree()
172
old_tree = b.revision_tree(b.lookup_revision(revision))
174
new_tree = b.working_tree()
176
show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
177
external_diff_options)
275
None for 'basis tree', or otherwise the old revision to compare against.
277
The more general form is show_diff_trees(), where the caller
278
supplies any two trees.
283
if from_spec is None:
284
old_tree = b.bzrdir.open_workingtree()
286
old_tree = old_tree = old_tree.basis_tree()
288
old_tree = b.repository.revision_tree(from_spec.in_history(b).rev_id)
290
if revision2 is None:
292
new_tree = b.bzrdir.open_workingtree()
294
new_tree = b2.bzrdir.open_workingtree()
296
new_tree = b.repository.revision_tree(revision2.in_history(b).rev_id)
298
return show_diff_trees(old_tree, new_tree, output, specific_files,
299
external_diff_options)
302
def diff_cmd_helper(tree, specific_files, external_diff_options,
303
old_revision_spec=None, new_revision_spec=None,
305
old_label='a/', new_label='b/'):
306
"""Helper for cmd_diff.
311
:param specific_files:
312
The specific files to compare, or None
314
:param external_diff_options:
315
If non-None, run an external diff, and pass it these options
317
:param old_revision_spec:
318
If None, use basis tree as old revision, otherwise use the tree for
319
the specified revision.
321
:param new_revision_spec:
322
If None, use working tree as new revision, otherwise use the tree for
323
the specified revision.
325
:param revision_specs:
326
Zero, one or two RevisionSpecs from the command line, saying what revisions
327
to compare. This can be passed as an alternative to the old_revision_spec
328
and new_revision_spec parameters.
330
The more general form is show_diff_trees(), where the caller
331
supplies any two trees.
334
# TODO: perhaps remove the old parameters old_revision_spec and
335
# new_revision_spec, since this is only really for use from cmd_diff and
336
# it now always passes through a sequence of revision_specs -- mbp
341
revision = spec.in_store(tree.branch)
343
revision = spec.in_store(None)
344
revision_id = revision.rev_id
345
branch = revision.branch
346
return branch.repository.revision_tree(revision_id)
348
if revision_specs is not None:
349
assert (old_revision_spec is None
350
and new_revision_spec is None)
351
if len(revision_specs) > 0:
352
old_revision_spec = revision_specs[0]
353
if len(revision_specs) > 1:
354
new_revision_spec = revision_specs[1]
356
if old_revision_spec is None:
357
old_tree = tree.basis_tree()
359
old_tree = spec_tree(old_revision_spec)
361
if (new_revision_spec is None
362
or new_revision_spec.spec is None):
365
new_tree = spec_tree(new_revision_spec)
367
if new_tree is not tree:
368
extra_trees = (tree,)
372
return show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
373
external_diff_options,
374
old_label=old_label, new_label=new_label,
375
extra_trees=extra_trees)
181
378
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
182
external_diff_options=None):
379
external_diff_options=None,
380
old_label='a/', new_label='b/',
183
382
"""Show in text form the changes from one tree to another.
210
430
diff_file = internal_diff
213
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
214
specific_files=specific_files)
432
delta = new_tree.changes_from(old_tree,
433
specific_files=specific_files,
434
extra_trees=extra_trees, require_versioned=True)
216
437
for path, file_id, kind in delta.removed:
217
print >>to_file, '*** removed %s %r' % (kind, path)
219
diff_file(old_label + path,
220
old_tree.get_file(file_id).readlines(),
439
print >>to_file, '=== removed %s %r' % (kind, path.encode('utf8'))
440
old_name = '%s%s\t%s' % (old_label, path,
441
_patch_header_date(old_tree, file_id, path))
442
new_name = '%s%s\t%s' % (new_label, path, EPOCH_DATE)
443
old_tree.inventory[file_id].diff(diff_file, old_name, old_tree,
444
new_name, None, None, to_file)
225
445
for path, file_id, kind in delta.added:
226
print >>to_file, '*** added %s %r' % (kind, path)
231
new_tree.get_file(file_id).readlines(),
234
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
235
print >>to_file, '*** renamed %s %r => %r' % (kind, old_path, new_path)
447
print >>to_file, '=== added %s %r' % (kind, path.encode('utf8'))
448
old_name = '%s%s\t%s' % (old_label, path, EPOCH_DATE)
449
new_name = '%s%s\t%s' % (new_label, path,
450
_patch_header_date(new_tree, file_id, path))
451
new_tree.inventory[file_id].diff(diff_file, new_name, new_tree,
452
old_name, None, None, to_file,
454
for (old_path, new_path, file_id, kind,
455
text_modified, meta_modified) in delta.renamed:
457
prop_str = get_prop_change(meta_modified)
458
print >>to_file, '=== renamed %s %r => %r%s' % (
459
kind, old_path.encode('utf8'),
460
new_path.encode('utf8'), prop_str)
461
old_name = '%s%s\t%s' % (old_label, old_path,
462
_patch_header_date(old_tree, file_id,
464
new_name = '%s%s\t%s' % (new_label, new_path,
465
_patch_header_date(new_tree, file_id,
467
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
469
text_modified, kind, to_file, diff_file)
470
for path, file_id, kind, text_modified, meta_modified in delta.modified:
472
prop_str = get_prop_change(meta_modified)
473
print >>to_file, '=== modified %s %r%s' % (kind, path.encode('utf8'), prop_str)
474
old_name = '%s%s\t%s' % (old_label, path,
475
_patch_header_date(old_tree, file_id, path))
476
new_name = '%s%s\t%s' % (new_label, path,
477
_patch_header_date(new_tree, file_id, path))
236
478
if text_modified:
237
diff_file(old_label + old_path,
238
old_tree.get_file(file_id).readlines(),
239
new_label + new_path,
240
new_tree.get_file(file_id).readlines(),
243
for path, file_id, kind in delta.modified:
244
print >>to_file, '*** modified %s %r' % (kind, path)
246
diff_file(old_label + path,
247
old_tree.get_file(file_id).readlines(),
249
new_tree.get_file(file_id).readlines(),
254
class TreeDelta(object):
255
"""Describes changes from one tree to another.
264
(oldpath, newpath, id, kind, text_modified)
270
Each id is listed only once.
272
Files that are both modified and renamed are listed only in
273
renamed, with the text_modified flag true.
275
Files are only considered renamed if their name has changed or
276
their parent directory has changed. Renaming a directory
277
does not count as renaming all its contents.
279
The lists are normally sorted when the delta is created.
288
def __eq__(self, other):
289
if not isinstance(other, TreeDelta):
291
return self.added == other.added \
292
and self.removed == other.removed \
293
and self.renamed == other.renamed \
294
and self.modified == other.modified \
295
and self.unchanged == other.unchanged
297
def __ne__(self, other):
298
return not (self == other)
301
return "TreeDelta(added=%r, removed=%r, renamed=%r, modified=%r," \
302
" unchanged=%r)" % (self.added, self.removed, self.renamed,
303
self.modified, self.unchanged)
305
def has_changed(self):
306
changes = len(self.added) + len(self.removed) + len(self.renamed)
307
changes += len(self.modified)
308
return (changes != 0)
310
def touches_file_id(self, file_id):
311
"""Return True if file_id is modified by this delta."""
312
for l in self.added, self.removed, self.modified:
316
for v in self.renamed:
322
def show(self, to_file, show_ids=False, show_unchanged=False):
323
def show_list(files):
324
for path, fid, kind in files:
325
if kind == 'directory':
327
elif kind == 'symlink':
331
print >>to_file, ' %-30s %s' % (path, fid)
333
print >>to_file, ' ', path
336
print >>to_file, 'removed:'
337
show_list(self.removed)
340
print >>to_file, 'added:'
341
show_list(self.added)
344
print >>to_file, 'renamed:'
345
for oldpath, newpath, fid, kind, text_modified in self.renamed:
347
print >>to_file, ' %s => %s %s' % (oldpath, newpath, fid)
349
print >>to_file, ' %s => %s' % (oldpath, newpath)
352
print >>to_file, 'modified:'
353
show_list(self.modified)
355
if show_unchanged and self.unchanged:
356
print >>to_file, 'unchanged:'
357
show_list(self.unchanged)
361
def compare_trees(old_tree, new_tree, want_unchanged=False, specific_files=None):
362
"""Describe changes from one tree to another.
364
Returns a TreeDelta with details of added, modified, renamed, and
367
The root entry is specifically exempt.
369
This only considers versioned files.
372
If true, also list files unchanged from one version to
376
If true, only check for changes to specified names or
380
from osutils import is_inside_any
479
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
481
True, kind, to_file, diff_file)
486
def _patch_header_date(tree, file_id, path):
487
"""Returns a timestamp suitable for use in a patch header."""
488
return timestamp.format_patch_date(tree.get_file_mtime(file_id, path))
491
def _raise_if_nonexistent(paths, old_tree, new_tree):
492
"""Complain if paths are not in either inventory or tree.
494
It's OK with the files exist in either tree's inventory, or
495
if they exist in the tree but are not versioned.
382
old_inv = old_tree.inventory
383
new_inv = new_tree.inventory
385
mutter('start compare_trees')
387
# TODO: match for specific files can be rather smarter by finding
388
# the IDs of those files up front and then considering only that.
390
for file_id in old_tree:
391
if file_id in new_tree:
392
old_ie = old_inv[file_id]
393
new_ie = new_inv[file_id]
396
assert kind == new_ie.kind
398
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
399
'invalid file kind %r' % kind
401
if kind == 'root_directory':
405
if (not is_inside_any(specific_files, old_inv.id2path(file_id))
406
and not is_inside_any(specific_files, new_inv.id2path(file_id))):
410
old_sha1 = old_tree.get_file_sha1(file_id)
411
new_sha1 = new_tree.get_file_sha1(file_id)
412
text_modified = (old_sha1 != new_sha1)
414
## mutter("no text to check for %r %r" % (file_id, kind))
415
text_modified = False
417
# TODO: Can possibly avoid calculating path strings if the
418
# two files are unchanged and their names and parents are
419
# the same and the parents are unchanged all the way up.
420
# May not be worthwhile.
422
if (old_ie.name != new_ie.name
423
or old_ie.parent_id != new_ie.parent_id):
424
delta.renamed.append((old_inv.id2path(file_id),
425
new_inv.id2path(file_id),
429
delta.modified.append((new_inv.id2path(file_id), file_id, kind))
431
delta.unchanged.append((new_inv.id2path(file_id), file_id, kind))
433
kind = old_inv.get_file_kind(file_id)
434
old_path = old_inv.id2path(file_id)
436
if not is_inside_any(specific_files, old_path):
438
delta.removed.append((old_path, file_id, kind))
440
mutter('start looking for new files')
441
for file_id in new_inv:
442
if file_id in old_inv:
444
new_path = new_inv.id2path(file_id)
446
if not is_inside_any(specific_files, new_path):
448
kind = new_inv.get_file_kind(file_id)
449
delta.added.append((new_path, file_id, kind))
454
delta.modified.sort()
455
delta.unchanged.sort()
497
This can be used by operations such as bzr status that can accept
498
unknown or ignored files.
500
mutter("check paths: %r", paths)
503
s = old_tree.filter_unversioned_files(paths)
504
s = new_tree.filter_unversioned_files(s)
505
s = [path for path in s if not new_tree.has_filename(path)]
507
raise errors.PathsDoNotExist(sorted(s))
510
def get_prop_change(meta_modified):
512
return " (properties changed)"
517
def _maybe_diff_file_or_symlink(old_path, old_tree, file_id,
518
new_path, new_tree, text_modified,
519
kind, to_file, diff_file):
521
new_entry = new_tree.inventory[file_id]
522
old_tree.inventory[file_id].diff(diff_file,