37
65
# both sequences are empty.
38
66
if not oldlines and not newlines:
43
if oldlines and (oldlines[-1][-1] != '\n'):
46
if newlines and (newlines[-1][-1] != '\n'):
50
ud = difflib.unified_diff(oldlines, newlines,
51
fromfile=old_label, tofile=new_label)
69
if allow_binary is False:
70
textfile.check_text_lines(oldlines)
71
textfile.check_text_lines(newlines)
73
if sequence_matcher is None:
74
sequence_matcher = patiencediff.PatienceSequenceMatcher
75
ud = patiencediff.unified_diff(oldlines, newlines,
76
fromfile=old_filename.encode(path_encoding),
77
tofile=new_filename.encode(path_encoding),
78
sequencematcher=sequence_matcher)
53
81
# work-around for difflib being too smart for its own good
54
82
# if /dev/null is "1,0", patch won't recognize it as /dev/null
57
84
ud[2] = ud[2].replace('-1,0', '-0,0')
60
86
ud[2] = ud[2].replace('+1,0', '+0,0')
87
# work around for difflib emitting random spaces after the label
88
ud[0] = ud[0][:-2] + '\n'
89
ud[1] = ud[1][:-2] + '\n'
62
to_file.writelines(ud)
64
print >>to_file, "\\ No newline at end of file"
93
if not line.endswith('\n'):
94
to_file.write("\n\\ No newline at end of file\n")
70
def external_diff(old_label, oldlines, new_label, newlines, to_file):
99
"""Set the env var LANG=C"""
100
osutils.set_or_unset_env('LANG', 'C')
101
osutils.set_or_unset_env('LC_ALL', None)
102
osutils.set_or_unset_env('LC_CTYPE', None)
103
osutils.set_or_unset_env('LANGUAGE', None)
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
This lets us read and understand the output of diff, and respond
113
:return: A Popen object.
116
if sys.platform == 'win32':
117
# Win32 doesn't support preexec_fn, but that is
118
# okay, because it doesn't support LANG either.
121
preexec_fn = _set_lang_C
122
stderr = subprocess.PIPE
128
pipe = subprocess.Popen(diffcmd,
129
stdin=subprocess.PIPE,
130
stdout=subprocess.PIPE,
132
preexec_fn=preexec_fn)
134
if e.errno == errno.ENOENT:
135
raise errors.NoDiff(str(e))
141
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
71
143
"""Display a diff by calling out to the external diff program."""
74
if to_file != sys.stdout:
75
raise NotImplementedError("sorry, can't send external diff other than to stdout yet",
78
from tempfile import NamedTemporaryFile
81
oldtmpf = NamedTemporaryFile()
82
newtmpf = NamedTemporaryFile()
144
# make sure our own output is properly ordered before the diff
147
oldtmp_fd, old_abspath = tempfile.mkstemp(prefix='bzr-diff-old-')
148
newtmp_fd, new_abspath = tempfile.mkstemp(prefix='bzr-diff-new-')
149
oldtmpf = os.fdopen(oldtmp_fd, 'wb')
150
newtmpf = os.fdopen(newtmp_fd, 'wb')
85
153
# TODO: perhaps a special case for comparing to or from the empty
89
157
# regular named file (e.g. in the working directory) then we can
90
158
# compare directly to that, rather than copying it.
92
# TODO: Set the labels appropriately
94
160
oldtmpf.writelines(oldlines)
95
161
newtmpf.writelines(newlines)
100
system('diff -u --label %s %s --label %s %s' % (old_label, oldtmpf.name, new_label, newtmpf.name))
169
'--label', old_filename,
171
'--label', new_filename,
176
# diff only allows one style to be specified; they don't override.
177
# note that some of these take optargs, and the optargs can be
178
# directly appended to the options.
179
# this is only an approximate parser; it doesn't properly understand
181
for s in ['-c', '-u', '-C', '-U',
186
'-y', '--side-by-side',
198
diffcmd.extend(diff_opts)
200
pipe = _spawn_external_diff(diffcmd, capture_errors=True)
201
out,err = pipe.communicate()
204
# internal_diff() adds a trailing newline, add one here for consistency
207
# 'diff' gives retcode == 2 for all sorts of errors
208
# one of those is 'Binary files differ'.
209
# Bad options could also be the problem.
210
# 'Binary files' is not a real error, so we suppress that error.
213
# Since we got here, we want to make sure to give an i18n error
214
pipe = _spawn_external_diff(diffcmd, capture_errors=False)
215
out, err = pipe.communicate()
217
# Write out the new i18n diff response
218
to_file.write(out+'\n')
219
if pipe.returncode != 2:
220
raise errors.BzrError(
221
'external diff failed with exit code 2'
222
' when run with LANG=C, but not when run'
223
' natively: %r' % (diffcmd,))
225
first_line = lang_c_out.split('\n', 1)[0]
226
# Starting with diffutils 2.8.4 the word "binary" was dropped.
227
m = re.match('^(binary )?files.*differ$', first_line, re.I)
229
raise errors.BzrError('external diff failed with exit code 2;'
230
' command: %r' % (diffcmd,))
232
# Binary files differ, just return
235
# If we got to here, we haven't written out the output of diff
239
# returns 1 if files differ; that's OK
241
msg = 'signal %d' % (-rc)
243
msg = 'exit code %d' % rc
245
raise errors.BzrError('external diff failed with %s; command: %r'
102
250
oldtmpf.close() # and delete
107
def diff_file(old_label, oldlines, new_label, newlines, to_file):
109
differ = external_diff
111
differ = internal_diff
113
differ(old_label, oldlines, new_label, newlines, to_file)
117
def show_diff(b, revision, specific_files):
121
old_tree = b.basis_tree()
123
old_tree = b.revision_tree(b.lookup_revision(revision))
125
new_tree = b.working_tree()
127
show_diff_trees(old_tree, new_tree, sys.stdout, specific_files)
131
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None):
252
# Clean up. Warn in case the files couldn't be deleted
253
# (in case windows still holds the file open, but not
254
# if the files have already been deleted)
256
os.remove(old_abspath)
258
if e.errno not in (errno.ENOENT,):
259
warning('Failed to delete temporary file: %s %s',
262
os.remove(new_abspath)
264
if e.errno not in (errno.ENOENT,):
265
warning('Failed to delete temporary file: %s %s',
269
@deprecated_function(zero_eight)
270
def show_diff(b, from_spec, specific_files, external_diff_options=None,
271
revision2=None, output=None, b2=None):
272
"""Shortcut for showing the diff to the working tree.
274
Please use show_diff_trees instead.
280
None for 'basis tree', or otherwise the old revision to compare against.
282
The more general form is show_diff_trees(), where the caller
283
supplies any two trees.
288
if from_spec is None:
289
old_tree = b.bzrdir.open_workingtree()
291
old_tree = old_tree = old_tree.basis_tree()
293
old_tree = b.repository.revision_tree(from_spec.in_history(b).rev_id)
295
if revision2 is None:
297
new_tree = b.bzrdir.open_workingtree()
299
new_tree = b2.bzrdir.open_workingtree()
301
new_tree = b.repository.revision_tree(revision2.in_history(b).rev_id)
303
return show_diff_trees(old_tree, new_tree, output, specific_files,
304
external_diff_options)
307
def diff_cmd_helper(tree, specific_files, external_diff_options,
308
old_revision_spec=None, new_revision_spec=None,
309
old_label='a/', new_label='b/'):
310
"""Helper for cmd_diff.
316
The specific files to compare, or None
318
external_diff_options
319
If non-None, run an external diff, and pass it these options
322
If None, use basis tree as old revision, otherwise use the tree for
323
the specified revision.
326
If None, use working tree as new revision, otherwise use the tree for
327
the specified revision.
329
The more general form is show_diff_trees(), where the caller
330
supplies any two trees.
334
revision = spec.in_store(tree.branch)
336
revision = spec.in_store(None)
337
revision_id = revision.rev_id
338
branch = revision.branch
339
return branch.repository.revision_tree(revision_id)
340
if old_revision_spec is None:
341
old_tree = tree.basis_tree()
343
old_tree = spec_tree(old_revision_spec)
345
if new_revision_spec is None:
348
new_tree = spec_tree(new_revision_spec)
349
if new_tree is not tree:
350
extra_trees = (tree,)
354
return show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
355
external_diff_options,
356
old_label=old_label, new_label=new_label,
357
extra_trees=extra_trees)
360
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
361
external_diff_options=None,
362
old_label='a/', new_label='b/',
132
364
"""Show in text form the changes from one tree to another.
135
367
If set, include only changes to these files.
369
external_diff_options
370
If set, use an external GNU diff and pass these options.
373
If set, more Trees to use for looking up file ids
138
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
142
DEVNULL = '/dev/null'
143
# Windows users, don't panic about this filename -- it is a
144
# special signal to GNU patch that the file should be created or
145
# deleted respectively.
379
return _show_diff_trees(old_tree, new_tree, to_file,
380
specific_files, external_diff_options,
381
old_label=old_label, new_label=new_label,
382
extra_trees=extra_trees)
389
def _show_diff_trees(old_tree, new_tree, to_file,
390
specific_files, external_diff_options,
391
old_label='a/', new_label='b/', extra_trees=None):
393
# GNU Patch uses the epoch date to detect files that are being added
394
# or removed in a diff.
395
EPOCH_DATE = '1970-01-01 00:00:00 +0000'
147
397
# TODO: Generation of pseudo-diffs for added/deleted files could
148
398
# be usefully made into a much faster special case.
150
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
151
specific_files=specific_files)
400
if external_diff_options:
401
assert isinstance(external_diff_options, basestring)
402
opts = external_diff_options.split()
403
def diff_file(olab, olines, nlab, nlines, to_file):
404
external_diff(olab, olines, nlab, nlines, to_file, opts)
406
diff_file = internal_diff
408
delta = new_tree.changes_from(old_tree,
409
specific_files=specific_files,
410
extra_trees=extra_trees, require_versioned=True)
153
413
for path, file_id, kind in delta.removed:
154
print '*** removed %s %r' % (kind, path)
156
diff_file(old_label + path,
157
old_tree.get_file(file_id).readlines(),
415
print >>to_file, '=== removed %s %r' % (kind, path.encode('utf8'))
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)
162
421
for path, file_id, kind in delta.added:
163
print '*** added %s %r' % (kind, path)
168
new_tree.get_file(file_id).readlines(),
171
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
172
print '*** renamed %s %r => %r' % (kind, old_path, new_path)
423
print >>to_file, '=== added %s %r' % (kind, path.encode('utf8'))
424
old_name = '%s%s\t%s' % (old_label, path, EPOCH_DATE)
425
new_name = '%s%s\t%s' % (new_label, path,
426
_patch_header_date(new_tree, file_id, path))
427
new_tree.inventory[file_id].diff(diff_file, new_name, new_tree,
428
old_name, None, None, to_file,
430
for (old_path, new_path, file_id, kind,
431
text_modified, meta_modified) in delta.renamed:
433
prop_str = get_prop_change(meta_modified)
434
print >>to_file, '=== renamed %s %r => %r%s' % (
435
kind, old_path.encode('utf8'),
436
new_path.encode('utf8'), prop_str)
437
old_name = '%s%s\t%s' % (old_label, old_path,
438
_patch_header_date(old_tree, file_id,
440
new_name = '%s%s\t%s' % (new_label, new_path,
441
_patch_header_date(new_tree, file_id,
443
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
445
text_modified, kind, to_file, diff_file)
446
for path, file_id, kind, text_modified, meta_modified in delta.modified:
448
prop_str = get_prop_change(meta_modified)
449
print >>to_file, '=== modified %s %r%s' % (kind, path.encode('utf8'), prop_str)
450
old_name = '%s%s\t%s' % (old_label, path,
451
_patch_header_date(old_tree, file_id, path))
452
new_name = '%s%s\t%s' % (new_label, path,
453
_patch_header_date(new_tree, file_id, path))
173
454
if text_modified:
174
diff_file(old_label + old_path,
175
old_tree.get_file(file_id).readlines(),
176
new_label + new_path,
177
new_tree.get_file(file_id).readlines(),
180
for path, file_id, kind in delta.modified:
181
print '*** modified %s %r' % (kind, path)
183
diff_file(old_label + path,
184
old_tree.get_file(file_id).readlines(),
186
new_tree.get_file(file_id).readlines(),
191
class TreeDelta(object):
192
"""Describes changes from one tree to another.
201
(oldpath, newpath, id, kind, text_modified)
207
Each id is listed only once.
209
Files that are both modified and renamed are listed only in
210
renamed, with the text_modified flag true.
212
The lists are normally sorted when the delta is created.
222
def touches_file_id(self, file_id):
223
"""Return True if file_id is modified by this delta."""
224
for l in self.added, self.removed, self.modified:
228
for v in self.renamed:
234
def show(self, to_file, show_ids=False, show_unchanged=False):
235
def show_list(files):
236
for path, fid, kind in files:
237
if kind == 'directory':
239
elif kind == 'symlink':
243
print >>to_file, ' %-30s %s' % (path, fid)
245
print >>to_file, ' ', path
248
print >>to_file, 'removed:'
249
show_list(self.removed)
252
print >>to_file, 'added:'
253
show_list(self.added)
256
print >>to_file, 'renamed:'
257
for oldpath, newpath, fid, kind, text_modified in self.renamed:
259
print >>to_file, ' %s => %s %s' % (oldpath, newpath, fid)
261
print >>to_file, ' %s => %s' % (oldpath, newpath)
264
print >>to_file, 'modified:'
265
show_list(self.modified)
267
if show_unchanged and self.unchanged:
268
print >>to_file, 'unchanged:'
269
show_list(self.unchanged)
273
def compare_trees(old_tree, new_tree, want_unchanged, specific_files=None):
274
"""Describe changes from one tree to another.
276
Returns a TreeDelta with details of added, modified, renamed, and
279
The root entry is specifically exempt.
281
This only considers versioned files.
284
If true, also list files unchanged from one version to
288
If true, only check for changes to specified names or
292
from osutils import is_inside_any
455
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
457
True, kind, to_file, diff_file)
462
def _patch_header_date(tree, file_id, path):
463
"""Returns a timestamp suitable for use in a patch header."""
464
tm = time.gmtime(tree.get_file_mtime(file_id, path))
465
return time.strftime('%Y-%m-%d %H:%M:%S +0000', tm)
468
def _raise_if_nonexistent(paths, old_tree, new_tree):
469
"""Complain if paths are not in either inventory or tree.
471
It's OK with the files exist in either tree's inventory, or
472
if they exist in the tree but are not versioned.
294
old_inv = old_tree.inventory
295
new_inv = new_tree.inventory
297
mutter('start compare_trees')
299
# TODO: match for specific files can be rather smarter by finding
300
# the IDs of those files up front and then considering only that.
302
for file_id in old_tree:
303
if file_id in new_tree:
304
kind = old_inv.get_file_kind(file_id)
305
assert kind == new_inv.get_file_kind(file_id)
307
assert kind in ('file', 'directory', 'symlink', 'root_directory'), \
308
'invalid file kind %r' % kind
310
if kind == 'root_directory':
313
old_path = old_inv.id2path(file_id)
314
new_path = new_inv.id2path(file_id)
317
if (not is_inside_any(specific_files, old_path)
318
and not is_inside_any(specific_files, new_path)):
322
old_sha1 = old_tree.get_file_sha1(file_id)
323
new_sha1 = new_tree.get_file_sha1(file_id)
324
text_modified = (old_sha1 != new_sha1)
326
## mutter("no text to check for %r %r" % (file_id, kind))
327
text_modified = False
329
# TODO: Can possibly avoid calculating path strings if the
330
# two files are unchanged and their names and parents are
331
# the same and the parents are unchanged all the way up.
332
# May not be worthwhile.
334
if old_path != new_path:
335
delta.renamed.append((old_path, new_path, file_id, kind,
338
delta.modified.append((new_path, file_id, kind))
340
delta.unchanged.append((new_path, file_id, kind))
342
kind = old_inv.get_file_kind(file_id)
343
old_path = old_inv.id2path(file_id)
345
if not is_inside_any(specific_files, old_path):
347
delta.removed.append((old_path, file_id, kind))
349
mutter('start looking for new files')
350
for file_id in new_inv:
351
if file_id in old_inv:
353
new_path = new_inv.id2path(file_id)
355
if not is_inside_any(specific_files, new_path):
357
kind = new_inv.get_file_kind(file_id)
358
delta.added.append((new_path, file_id, kind))
363
delta.modified.sort()
364
delta.unchanged.sort()
474
This can be used by operations such as bzr status that can accept
475
unknown or ignored files.
477
mutter("check paths: %r", paths)
480
s = old_tree.filter_unversioned_files(paths)
481
s = new_tree.filter_unversioned_files(s)
482
s = [path for path in s if not new_tree.has_filename(path)]
484
raise errors.PathsDoNotExist(sorted(s))
487
def get_prop_change(meta_modified):
489
return " (properties changed)"
494
def _maybe_diff_file_or_symlink(old_path, old_tree, file_id,
495
new_path, new_tree, text_modified,
496
kind, to_file, diff_file):
498
new_entry = new_tree.inventory[file_id]
499
old_tree.inventory[file_id].diff(diff_file,