60
40
# both sequences are empty.
61
41
if not oldlines and not newlines:
64
if allow_binary is False:
65
check_text_lines(oldlines)
66
check_text_lines(newlines)
68
if sequence_matcher is None:
69
sequence_matcher = bzrlib.patiencediff.PatienceSequenceMatcher
70
ud = unified_diff(oldlines, newlines,
71
fromfile=old_filename.encode(path_encoding),
72
tofile=new_filename.encode(path_encoding),
73
sequencematcher=sequence_matcher)
46
if oldlines and (oldlines[-1][-1] != '\n'):
49
if newlines and (newlines[-1][-1] != '\n'):
53
ud = difflib.unified_diff(oldlines, newlines, **kw)
76
55
# work-around for difflib being too smart for its own good
77
56
# if /dev/null is "1,0", patch won't recognize it as /dev/null
79
59
ud[2] = ud[2].replace('-1,0', '-0,0')
81
62
ud[2] = ud[2].replace('+1,0', '+0,0')
82
# work around for difflib emitting random spaces after the label
83
ud[0] = ud[0][:-2] + '\n'
84
ud[1] = ud[1][:-2] + '\n'
88
if not line.endswith('\n'):
89
to_file.write("\n\\ No newline at end of file\n")
64
to_file.writelines(ud)
66
print >>to_file, "\\ No newline at end of file"
94
"""Set the env var LANG=C"""
95
osutils.set_or_unset_env('LANG', 'C')
96
osutils.set_or_unset_env('LC_ALL', None)
97
osutils.set_or_unset_env('LC_CTYPE', None)
98
osutils.set_or_unset_env('LANGUAGE', None)
101
def _spawn_external_diff(diffcmd, capture_errors=True):
102
"""Spawn the externall diff process, and return the child handle.
104
:param diffcmd: The command list to spawn
105
:param capture_errors: Capture stderr as well as setting LANG=C.
106
This lets us read and understand the output of diff, and respond
108
:return: A Popen object.
111
if sys.platform == 'win32':
112
# Win32 doesn't support preexec_fn, but that is
113
# okay, because it doesn't support LANG either.
116
preexec_fn = _set_lang_C
117
stderr = subprocess.PIPE
70
def show_diff(b, revision, specific_files):
74
old_tree = b.basis_tree()
123
pipe = subprocess.Popen(diffcmd,
124
stdin=subprocess.PIPE,
125
stdout=subprocess.PIPE,
127
preexec_fn=preexec_fn)
129
if e.errno == errno.ENOENT:
130
raise errors.NoDiff(str(e))
136
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
138
"""Display a diff by calling out to the external diff program."""
139
# make sure our own output is properly ordered before the diff
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')
148
# TODO: perhaps a special case for comparing to or from the empty
149
# sequence; can just use /dev/null on Unix
151
# TODO: if either of the files being compared already exists as a
152
# regular named file (e.g. in the working directory) then we can
153
# compare directly to that, rather than copying it.
155
oldtmpf.writelines(oldlines)
156
newtmpf.writelines(newlines)
164
'--label', old_filename,
166
'--label', new_filename,
171
# diff only allows one style to be specified; they don't override.
172
# note that some of these take optargs, and the optargs can be
173
# directly appended to the options.
174
# this is only an approximate parser; it doesn't properly understand
176
for s in ['-c', '-u', '-C', '-U',
181
'-y', '--side-by-side',
193
diffcmd.extend(diff_opts)
195
pipe = _spawn_external_diff(diffcmd, capture_errors=True)
196
out,err = pipe.communicate()
76
old_tree = b.revision_tree(b.lookup_revision(revision))
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 BzrError('external diff failed with exit code 2'
216
' when run with LANG=C, but not when run'
217
' natively: %r' % (diffcmd,))
219
first_line = lang_c_out.split('\n', 1)[0]
220
# Starting with diffutils 2.8.4 the word "binary" was dropped.
221
m = re.match('^(binary )?files.*differ$', first_line, re.I)
223
raise BzrError('external diff failed with exit code 2;'
224
' command: %r' % (diffcmd,))
226
# Binary files differ, just return
229
# If we got to here, we haven't written out the output of diff
233
# returns 1 if files differ; that's OK
235
msg = 'signal %d' % (-rc)
237
msg = 'exit code %d' % rc
239
raise BzrError('external diff failed with %s; command: %r'
244
oldtmpf.close() # and delete
246
# Clean up. Warn in case the files couldn't be deleted
247
# (in case windows still holds the file open, but not
248
# if the files have already been deleted)
250
os.remove(old_abspath)
252
if e.errno not in (errno.ENOENT,):
253
warning('Failed to delete temporary file: %s %s',
256
os.remove(new_abspath)
258
if e.errno not in (errno.ENOENT,):
259
warning('Failed to delete temporary file: %s %s',
263
@deprecated_function(zero_eight)
264
def show_diff(b, from_spec, specific_files, external_diff_options=None,
265
revision2=None, output=None, b2=None):
266
"""Shortcut for showing the diff to the working tree.
268
Please use show_diff_trees instead.
274
None for 'basis tree', or otherwise the old revision to compare against.
276
The more general form is show_diff_trees(), where the caller
277
supplies any two trees.
282
if from_spec is None:
283
old_tree = b.bzrdir.open_workingtree()
285
old_tree = old_tree = old_tree.basis_tree()
287
old_tree = b.repository.revision_tree(from_spec.in_history(b).rev_id)
289
if revision2 is None:
291
new_tree = b.bzrdir.open_workingtree()
293
new_tree = b2.bzrdir.open_workingtree()
295
new_tree = b.repository.revision_tree(revision2.in_history(b).rev_id)
297
return show_diff_trees(old_tree, new_tree, output, specific_files,
298
external_diff_options)
301
def diff_cmd_helper(tree, specific_files, external_diff_options,
302
old_revision_spec=None, new_revision_spec=None,
303
old_label='a/', new_label='b/'):
304
"""Helper for cmd_diff.
310
The specific files to compare, or None
312
external_diff_options
313
If non-None, run an external diff, and pass it these options
316
If None, use basis tree as old revision, otherwise use the tree for
317
the specified revision.
320
If None, use working tree as new revision, otherwise use the tree for
321
the specified revision.
323
The more general form is show_diff_trees(), where the caller
324
supplies any two trees.
328
revision = spec.in_store(tree.branch)
330
revision = spec.in_store(None)
331
revision_id = revision.rev_id
332
branch = revision.branch
333
return branch.repository.revision_tree(revision_id)
334
if old_revision_spec is None:
335
old_tree = tree.basis_tree()
337
old_tree = spec_tree(old_revision_spec)
339
if new_revision_spec is None:
342
new_tree = spec_tree(new_revision_spec)
343
if new_tree is not tree:
344
extra_trees = (tree,)
348
return show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
349
external_diff_options,
350
old_label=old_label, new_label=new_label,
351
extra_trees=extra_trees)
354
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
355
external_diff_options=None,
356
old_label='a/', new_label='b/',
358
"""Show in text form the changes from one tree to another.
361
If set, include only changes to these files.
363
external_diff_options
364
If set, use an external GNU diff and pass these options.
367
If set, more Trees to use for looking up file ids
373
return _show_diff_trees(old_tree, new_tree, to_file,
374
specific_files, external_diff_options,
375
old_label=old_label, new_label=new_label,
376
extra_trees=extra_trees)
383
def _show_diff_trees(old_tree, new_tree, to_file,
384
specific_files, external_diff_options,
385
old_label='a/', new_label='b/', extra_trees=None):
387
# GNU Patch uses the epoch date to detect files that are being added
388
# or removed in a diff.
389
EPOCH_DATE = '1970-01-01 00:00:00 +0000'
78
new_tree = b.working_tree()
80
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
85
# Windows users, don't panic about this filename -- it is a
86
# special signal to GNU patch that the file should be created or
87
# deleted respectively.
391
89
# TODO: Generation of pseudo-diffs for added/deleted files could
392
90
# be usefully made into a much faster special case.
394
if external_diff_options:
395
assert isinstance(external_diff_options, basestring)
396
opts = external_diff_options.split()
397
def diff_file(olab, olines, nlab, nlines, to_file):
398
external_diff(olab, olines, nlab, nlines, to_file, opts)
400
diff_file = internal_diff
402
delta = new_tree.changes_from(old_tree,
403
specific_files=specific_files,
404
extra_trees=extra_trees, require_versioned=True)
92
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
93
specific_files=specific_files)
407
95
for path, file_id, kind in delta.removed:
409
print >>to_file, '=== removed %s %r' % (kind, path.encode('utf8'))
410
old_name = '%s%s\t%s' % (old_label, path,
411
_patch_header_date(old_tree, file_id, path))
412
new_name = '%s%s\t%s' % (new_label, path, EPOCH_DATE)
413
old_tree.inventory[file_id].diff(diff_file, old_name, old_tree,
414
new_name, None, None, to_file)
96
print '*** removed %s %r' % (kind, path)
98
_diff_one(old_tree.get_file(file_id).readlines(),
101
fromfile=old_label + path,
415
104
for path, file_id, kind in delta.added:
417
print >>to_file, '=== added %s %r' % (kind, path.encode('utf8'))
418
old_name = '%s%s\t%s' % (old_label, path, EPOCH_DATE)
419
new_name = '%s%s\t%s' % (new_label, path,
420
_patch_header_date(new_tree, file_id, path))
421
new_tree.inventory[file_id].diff(diff_file, new_name, new_tree,
422
old_name, None, None, to_file,
424
for (old_path, new_path, file_id, kind,
425
text_modified, meta_modified) in delta.renamed:
427
prop_str = get_prop_change(meta_modified)
428
print >>to_file, '=== renamed %s %r => %r%s' % (
429
kind, old_path.encode('utf8'),
430
new_path.encode('utf8'), prop_str)
431
old_name = '%s%s\t%s' % (old_label, old_path,
432
_patch_header_date(old_tree, file_id,
434
new_name = '%s%s\t%s' % (new_label, new_path,
435
_patch_header_date(new_tree, file_id,
437
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
439
text_modified, kind, to_file, diff_file)
440
for path, file_id, kind, text_modified, meta_modified in delta.modified:
442
prop_str = get_prop_change(meta_modified)
443
print >>to_file, '=== modified %s %r%s' % (kind, path.encode('utf8'), prop_str)
444
old_name = '%s%s\t%s' % (old_label, path,
445
_patch_header_date(old_tree, file_id, path))
446
new_name = '%s%s\t%s' % (new_label, path,
447
_patch_header_date(new_tree, file_id, path))
105
print '*** added %s %r' % (kind, path)
108
new_tree.get_file(file_id).readlines(),
111
tofile=new_label + path)
113
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
114
print '*** renamed %s %r => %r' % (kind, old_path, new_path)
448
115
if text_modified:
449
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
451
True, kind, to_file, diff_file)
456
def _patch_header_date(tree, file_id, path):
457
"""Returns a timestamp suitable for use in a patch header."""
458
tm = time.gmtime(tree.get_file_mtime(file_id, path))
459
return time.strftime('%Y-%m-%d %H:%M:%S +0000', tm)
462
def _raise_if_nonexistent(paths, old_tree, new_tree):
463
"""Complain if paths are not in either inventory or tree.
465
It's OK with the files exist in either tree's inventory, or
466
if they exist in the tree but are not versioned.
468
This can be used by operations such as bzr status that can accept
469
unknown or ignored files.
471
mutter("check paths: %r", paths)
474
s = old_tree.filter_unversioned_files(paths)
475
s = new_tree.filter_unversioned_files(s)
476
s = [path for path in s if not new_tree.has_filename(path)]
478
raise errors.PathsDoNotExist(sorted(s))
481
def get_prop_change(meta_modified):
483
return " (properties changed)"
488
def _maybe_diff_file_or_symlink(old_path, old_tree, file_id,
489
new_path, new_tree, text_modified,
490
kind, to_file, diff_file):
492
new_entry = new_tree.inventory[file_id]
493
old_tree.inventory[file_id].diff(diff_file,
116
_diff_one(old_tree.get_file(file_id).readlines(),
117
new_tree.get_file(file_id).readlines(),
119
fromfile=old_label + old_path,
120
tofile=new_label + new_path)
122
for path, file_id, kind in delta.modified:
123
print '*** modified %s %r' % (kind, path)
125
_diff_one(old_tree.get_file(file_id).readlines(),
126
new_tree.get_file(file_id).readlines(),
128
fromfile=old_label + path,
129
tofile=new_label + path)
134
"""Describes changes from one tree to another.
143
(oldpath, newpath, id, kind, text_modified)
149
Each id is listed only once.
151
Files that are both modified and renamed are listed only in
152
renamed, with the text_modified flag true.
154
The lists are normally sorted when the delta is created.
163
def show(self, to_file, show_ids=False, show_unchanged=False):
164
def show_list(files):
165
for path, fid, kind in files:
166
if kind == 'directory':
168
elif kind == 'symlink':
172
print >>to_file, ' %-30s %s' % (path, fid)
174
print >>to_file, ' ', path
177
print >>to_file, 'removed:'
178
show_list(self.removed)
181
print >>to_file, 'added:'
182
show_list(self.added)
185
print >>to_file, 'renamed:'
186
for oldpath, newpath, fid, kind, text_modified in self.renamed:
188
print >>to_file, ' %s => %s %s' % (oldpath, newpath, fid)
190
print >>to_file, ' %s => %s' % (oldpath, newpath)
193
print >>to_file, 'modified:'
194
show_list(self.modified)
196
if show_unchanged and self.unchanged:
197
print >>to_file, 'unchanged:'
198
show_list(self.unchanged)
202
def compare_trees(old_tree, new_tree, want_unchanged, specific_files=None):
203
"""Describe changes from one tree to another.
205
Returns a TreeDelta with details of added, modified, renamed, and
208
The root entry is specifically exempt.
210
This only considers versioned files.
213
If true, also list files unchanged from one version to the next.
216
If true, only check for changes to specified files.
218
old_inv = old_tree.inventory
219
new_inv = new_tree.inventory
221
mutter('start compare_trees')
224
specific_files = ImmutableSet(specific_files)
226
for file_id in old_tree:
227
if file_id in new_tree:
228
kind = old_inv.get_file_kind(file_id)
229
assert kind == new_inv.get_file_kind(file_id)
231
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
232
'invalid file kind %r' % kind
234
if kind == 'root_directory':
237
old_path = old_inv.id2path(file_id)
238
new_path = new_inv.id2path(file_id)
241
if (old_path not in specific_files
242
and new_path not in specific_files):
246
old_sha1 = old_tree.get_file_sha1(file_id)
247
new_sha1 = new_tree.get_file_sha1(file_id)
248
text_modified = (old_sha1 != new_sha1)
250
## mutter("no text to check for %r %r" % (file_id, kind))
251
text_modified = False
253
# TODO: Can possibly avoid calculating path strings if the
254
# two files are unchanged and their names and parents are
255
# the same and the parents are unchanged all the way up.
256
# May not be worthwhile.
258
if old_path != new_path:
259
delta.renamed.append((old_path, new_path, file_id, kind,
262
delta.modified.append((new_path, file_id, kind))
264
delta.unchanged.append((new_path, file_id, kind))
266
delta.removed.append((old_inv.id2path(file_id), file_id, kind))
268
mutter('start looking for new files')
269
for file_id in new_inv:
270
if file_id in old_inv:
272
new_path = new_inv.id2path(file_id)
274
if new_path not in specific_files:
276
kind = new_inv.get_file_kind(file_id)
277
delta.added.append((new_path, file_id, kind))
282
delta.modified.sort()
283
delta.unchanged.sort()