41
73
# both sequences are empty.
42
74
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)
77
if allow_binary is False:
78
textfile.check_text_lines(oldlines)
79
textfile.check_text_lines(newlines)
81
if sequence_matcher is None:
82
sequence_matcher = patiencediff.PatienceSequenceMatcher
83
ud = patiencediff.unified_diff(oldlines, newlines,
84
fromfile=old_filename.encode(path_encoding),
85
tofile=new_filename.encode(path_encoding),
86
sequencematcher=sequence_matcher)
57
89
# work-around for difflib being too smart for its own good
58
90
# if /dev/null is "1,0", patch won't recognize it as /dev/null
61
92
ud[2] = ud[2].replace('-1,0', '-0,0')
64
94
ud[2] = ud[2].replace('+1,0', '+0,0')
95
# work around for difflib emitting random spaces after the label
96
ud[0] = ud[0][:-2] + '\n'
97
ud[1] = ud[1][:-2] + '\n'
67
100
to_file.write(line)
69
print >>to_file, "\\ No newline at end of file"
101
if not line.endswith('\n'):
102
to_file.write("\n\\ No newline at end of file\n")
75
def external_diff(old_label, oldlines, new_label, newlines, to_file,
106
def _spawn_external_diff(diffcmd, capture_errors=True):
107
"""Spawn the externall diff process, and return the child handle.
109
:param diffcmd: The command list to spawn
110
:param capture_errors: Capture stderr as well as setting LANG=C
111
and LC_ALL=C. This lets us read and understand the output of diff,
112
and respond to any errors.
113
:return: A Popen object.
116
# construct minimal environment
118
path = os.environ.get('PATH')
121
env['LANGUAGE'] = 'C' # on win32 only LANGUAGE has effect
124
stderr = subprocess.PIPE
130
pipe = subprocess.Popen(diffcmd,
131
stdin=subprocess.PIPE,
132
stdout=subprocess.PIPE,
136
if e.errno == errno.ENOENT:
137
raise errors.NoDiff(str(e))
143
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
77
145
"""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
146
# make sure our own output is properly ordered before the diff
87
from tempfile import NamedTemporaryFile
90
oldtmpf = NamedTemporaryFile()
91
newtmpf = NamedTemporaryFile()
149
oldtmp_fd, old_abspath = tempfile.mkstemp(prefix='bzr-diff-old-')
150
newtmp_fd, new_abspath = tempfile.mkstemp(prefix='bzr-diff-new-')
151
oldtmpf = os.fdopen(oldtmp_fd, 'wb')
152
newtmpf = os.fdopen(newtmp_fd, 'wb')
94
155
# TODO: perhaps a special case for comparing to or from the empty
137
200
diffcmd.extend(diff_opts)
139
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
202
pipe = _spawn_external_diff(diffcmd, capture_errors=True)
203
out,err = pipe.communicate()
141
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
142
241
# returns 1 if files differ; that's OK
144
243
msg = 'signal %d' % (-rc)
146
245
msg = 'exit code %d' % rc
148
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
247
raise errors.BzrError('external diff failed with %s; command: %r'
150
252
oldtmpf.close() # and delete
155
def show_diff(b, revision, specific_files, external_diff_options=None):
156
"""Shortcut for showing the diff to the working tree.
162
None for each, 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.
164
299
The more general form is show_diff_trees(), where the caller
165
300
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)
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)
181
347
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
182
external_diff_options=None):
348
external_diff_options=None,
349
old_label='a/', new_label='b/',
351
path_encoding='utf8'):
183
352
"""Show in text form the changes from one tree to another.
210
405
diff_file = internal_diff
213
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
214
specific_files=specific_files)
407
delta = new_tree.changes_from(old_tree,
408
specific_files=specific_files,
409
extra_trees=extra_trees, require_versioned=True)
216
412
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(),
414
path_encoded = path.encode(path_encoding, "replace")
415
print >>to_file, "=== removed %s '%s'" % (kind, path_encoded)
416
old_name = '%s%s\t%s' % (old_label, path,
417
_patch_header_date(old_tree, file_id, path))
418
new_name = '%s%s\t%s' % (new_label, path, EPOCH_DATE)
419
old_tree.inventory[file_id].diff(diff_file, old_name, old_tree,
420
new_name, None, None, to_file)
225
421
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)
423
path_encoded = path.encode(path_encoding, "replace")
424
print >>to_file, "=== added %s '%s'" % (kind, path_encoded)
425
old_name = '%s%s\t%s' % (old_label, path, EPOCH_DATE)
426
new_name = '%s%s\t%s' % (new_label, path,
427
_patch_header_date(new_tree, file_id, path))
428
new_tree.inventory[file_id].diff(diff_file, new_name, new_tree,
429
old_name, None, None, to_file,
431
for (old_path, new_path, file_id, kind,
432
text_modified, meta_modified) in delta.renamed:
434
prop_str = get_prop_change(meta_modified)
435
oldpath_encoded = old_path.encode(path_encoding, "replace")
436
newpath_encoded = new_path.encode(path_encoding, "replace")
437
print >>to_file, "=== renamed %s '%s' => '%s'%s" % (kind,
438
oldpath_encoded, newpath_encoded, prop_str)
439
old_name = '%s%s\t%s' % (old_label, old_path,
440
_patch_header_date(old_tree, file_id,
442
new_name = '%s%s\t%s' % (new_label, new_path,
443
_patch_header_date(new_tree, file_id,
445
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
447
text_modified, kind, to_file, diff_file)
448
for path, file_id, kind, text_modified, meta_modified in delta.modified:
450
prop_str = get_prop_change(meta_modified)
451
path_encoded = path.encode(path_encoding, "replace")
452
print >>to_file, "=== modified %s '%s'%s" % (kind,
453
path_encoded, prop_str)
454
# The file may be in a different location in the old tree (because
455
# the containing dir was renamed, but the file itself was not)
456
old_path = old_tree.id2path(file_id)
457
old_name = '%s%s\t%s' % (old_label, old_path,
458
_patch_header_date(old_tree, file_id, old_path))
459
new_name = '%s%s\t%s' % (new_label, path,
460
_patch_header_date(new_tree, file_id, path))
236
461
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
462
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
464
True, kind, to_file, diff_file)
469
def _patch_header_date(tree, file_id, path):
470
"""Returns a timestamp suitable for use in a patch header."""
471
mtime = tree.get_file_mtime(file_id, path)
472
assert mtime is not None, \
473
"got an mtime of None for file-id %s, path %s in tree %s" % (
475
return timestamp.format_patch_date(mtime)
478
def _raise_if_nonexistent(paths, old_tree, new_tree):
479
"""Complain if paths are not in either inventory or tree.
481
It's OK with the files exist in either tree's inventory, or
482
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()
484
This can be used by operations such as bzr status that can accept
485
unknown or ignored files.
487
mutter("check paths: %r", paths)
490
s = old_tree.filter_unversioned_files(paths)
491
s = new_tree.filter_unversioned_files(s)
492
s = [path for path in s if not new_tree.has_filename(path)]
494
raise errors.PathsDoNotExist(sorted(s))
497
def get_prop_change(meta_modified):
499
return " (properties changed)"
504
def _maybe_diff_file_or_symlink(old_path, old_tree, file_id,
505
new_path, new_tree, text_modified,
506
kind, to_file, diff_file):
508
new_entry = new_tree.inventory[file_id]
509
old_tree.inventory[file_id].diff(diff_file,