1
# Copyright (C) 2004, 2005, 2006 Canonical Ltd.
2
# -*- coding: UTF-8 -*-
3
4
# This program is free software; you can redistribute it and/or modify
4
5
# it under the terms of the GNU General Public License as published by
5
6
# the Free Software Foundation; either version 2 of the License, or
6
7
# (at your option) any later version.
8
9
# This program is distributed in the hope that it will be useful,
9
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
12
# GNU General Public License for more details.
13
14
# You should have received a copy of the GNU General Public License
14
15
# along with this program; if not, write to the Free Software
15
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25
# compatability - plugins import compare_trees from diff!!!
26
# deprecated as of 0.10
18
from bzrlib.trace import mutter
19
from bzrlib.errors import BzrError
27
20
from bzrlib.delta import compare_trees
28
from bzrlib.errors import BzrError
29
import bzrlib.errors as errors
31
from bzrlib.patiencediff import unified_diff
32
import bzrlib.patiencediff
33
from bzrlib.symbol_versioning import (deprecated_function,
35
from bzrlib.textfile import check_text_lines
36
from bzrlib.trace import mutter, warning
39
22
# TODO: Rather than building a changeset object, we should probably
40
23
# invoke callbacks on an object. That object can either accumulate a
41
24
# list, write them out directly, etc etc.
43
def internal_diff(old_filename, oldlines, new_filename, newlines, to_file,
44
allow_binary=False, sequence_matcher=None,
45
path_encoding='utf8'):
26
def internal_diff(old_label, oldlines, new_label, newlines, to_file):
46
29
# FIXME: difflib is wrong if there is no trailing newline.
47
30
# The syntax used by patch seems to be "\ No newline at
48
31
# end of file" following the last diff line from that
58
41
# both sequences are empty.
59
42
if not oldlines and not newlines:
62
if allow_binary is False:
63
check_text_lines(oldlines)
64
check_text_lines(newlines)
66
if sequence_matcher is None:
67
sequence_matcher = bzrlib.patiencediff.PatienceSequenceMatcher
68
ud = unified_diff(oldlines, newlines,
69
fromfile=old_filename.encode(path_encoding),
70
tofile=new_filename.encode(path_encoding),
71
sequencematcher=sequence_matcher)
45
ud = difflib.unified_diff(oldlines, newlines,
46
fromfile=old_label, tofile=new_label)
74
48
# work-around for difflib being too smart for its own good
75
49
# if /dev/null is "1,0", patch won't recognize it as /dev/null
77
52
ud[2] = ud[2].replace('-1,0', '-0,0')
79
55
ud[2] = ud[2].replace('+1,0', '+0,0')
80
# work around for difflib emitting random spaces after the label
81
ud[0] = ud[0][:-2] + '\n'
82
ud[1] = ud[1][:-2] + '\n'
85
58
to_file.write(line)
148
128
diffcmd.extend(diff_opts)
151
pipe = subprocess.Popen(diffcmd,
152
stdin=subprocess.PIPE,
153
stdout=subprocess.PIPE)
155
if e.errno == errno.ENOENT:
156
raise errors.NoDiff(str(e))
160
first_line = pipe.stdout.readline()
161
to_file.write(first_line)
162
bzrlib.osutils.pumpfile(pipe.stdout, to_file)
130
rc = os.spawnvp(os.P_WAIT, 'diff', diffcmd)
166
# 'diff' gives retcode == 2 for all sorts of errors
167
# one of those is 'Binary files differ'.
168
# Bad options could also be the problem.
169
# 'Binary files' is not a real error, so we suppress that error
170
m = re.match('^binary files.*differ$', first_line, re.I)
172
raise BzrError('external diff failed with exit code 2;'
173
' command: %r' % (diffcmd,))
174
elif rc not in (0, 1):
132
if rc != 0 and rc != 1:
175
133
# returns 1 if files differ; that's OK
177
135
msg = 'signal %d' % (-rc)
179
137
msg = 'exit code %d' % rc
181
raise BzrError('external diff failed with %s; command: %r'
184
# internal_diff() adds a trailing newline, add one here for consistency
139
raise BzrError('external diff failed with %s; command: %r' % (rc, diffcmd))
188
141
oldtmpf.close() # and delete
190
# Clean up. Warn in case the files couldn't be deleted
191
# (in case windows still holds the file open, but not
192
# if the files have already been deleted)
194
os.remove(old_abspath)
196
if e.errno not in (errno.ENOENT,):
197
warning('Failed to delete temporary file: %s %s',
200
os.remove(new_abspath)
202
if e.errno not in (errno.ENOENT,):
203
warning('Failed to delete temporary file: %s %s',
207
@deprecated_function(zero_eight)
208
def show_diff(b, from_spec, specific_files, external_diff_options=None,
209
revision2=None, output=None, b2=None):
146
def show_diff(b, revision, specific_files, external_diff_options=None,
147
revision2=None, output=None):
210
148
"""Shortcut for showing the diff to the working tree.
212
Please use show_diff_trees instead.
218
None for 'basis tree', or otherwise the old revision to compare against.
154
None for each, or otherwise the old revision to compare against.
220
156
The more general form is show_diff_trees(), where the caller
221
157
supplies any two trees.
223
159
if output is None:
224
161
output = sys.stdout
226
if from_spec is None:
227
old_tree = b.bzrdir.open_workingtree()
229
old_tree = old_tree = old_tree.basis_tree()
231
old_tree = b.repository.revision_tree(from_spec.in_history(b).rev_id)
233
if revision2 is None:
235
new_tree = b.bzrdir.open_workingtree()
237
new_tree = b2.bzrdir.open_workingtree()
239
new_tree = b.repository.revision_tree(revision2.in_history(b).rev_id)
241
return show_diff_trees(old_tree, new_tree, output, specific_files,
242
external_diff_options)
245
def diff_cmd_helper(tree, specific_files, external_diff_options,
246
old_revision_spec=None, new_revision_spec=None,
247
old_label='a/', new_label='b/'):
248
"""Helper for cmd_diff.
254
The specific files to compare, or None
256
external_diff_options
257
If non-None, run an external diff, and pass it these options
260
If None, use basis tree as old revision, otherwise use the tree for
261
the specified revision.
264
If None, use working tree as new revision, otherwise use the tree for
265
the specified revision.
267
The more general form is show_diff_trees(), where the caller
268
supplies any two trees.
272
revision = spec.in_store(tree.branch)
274
revision = spec.in_store(None)
275
revision_id = revision.rev_id
276
branch = revision.branch
277
return branch.repository.revision_tree(revision_id)
278
if old_revision_spec is None:
279
old_tree = tree.basis_tree()
281
old_tree = spec_tree(old_revision_spec)
283
if new_revision_spec is None:
286
new_tree = spec_tree(new_revision_spec)
287
if new_tree is not tree:
288
extra_trees = (tree,)
292
return show_diff_trees(old_tree, new_tree, sys.stdout, specific_files,
293
external_diff_options,
294
old_label=old_label, new_label=new_label,
295
extra_trees=extra_trees)
164
old_tree = b.basis_tree()
166
old_tree = b.revision_tree(b.lookup_revision(revision))
168
if revision2 == None:
169
new_tree = b.working_tree()
171
new_tree = b.revision_tree(b.lookup_revision(revision2))
173
show_diff_trees(old_tree, new_tree, output, specific_files,
174
external_diff_options)
298
178
def show_diff_trees(old_tree, new_tree, to_file, specific_files=None,
299
external_diff_options=None,
300
old_label='a/', new_label='b/',
179
external_diff_options=None):
302
180
"""Show in text form the changes from one tree to another.
307
185
external_diff_options
308
186
If set, use an external GNU diff and pass these options.
311
If set, more Trees to use for looking up file ids
317
return _show_diff_trees(old_tree, new_tree, to_file,
318
specific_files, external_diff_options,
319
old_label=old_label, new_label=new_label,
320
extra_trees=extra_trees)
327
def _show_diff_trees(old_tree, new_tree, to_file,
328
specific_files, external_diff_options,
329
old_label='a/', new_label='b/', extra_trees=None):
331
# GNU Patch uses the epoch date to detect files that are being added
332
# or removed in a diff.
333
EPOCH_DATE = '1970-01-01 00:00:00 +0000'
189
# TODO: Options to control putting on a prefix or suffix, perhaps as a format string
193
DEVNULL = '/dev/null'
194
# Windows users, don't panic about this filename -- it is a
195
# special signal to GNU patch that the file should be created or
196
# deleted respectively.
335
198
# TODO: Generation of pseudo-diffs for added/deleted files could
336
199
# be usefully made into a much faster special case.
344
207
diff_file = internal_diff
346
delta = new_tree.changes_from(old_tree,
347
specific_files=specific_files,
348
extra_trees=extra_trees, require_versioned=True)
210
delta = compare_trees(old_tree, new_tree, want_unchanged=False,
211
specific_files=specific_files)
351
213
for path, file_id, kind in delta.removed:
353
print >>to_file, '=== removed %s %r' % (kind, path.encode('utf8'))
354
old_name = '%s%s\t%s' % (old_label, path,
355
_patch_header_date(old_tree, file_id, path))
356
new_name = '%s%s\t%s' % (new_label, path, EPOCH_DATE)
357
old_tree.inventory[file_id].diff(diff_file, old_name, old_tree,
358
new_name, None, None, to_file)
214
print >>to_file, '*** removed %s %r' % (kind, path)
216
diff_file(old_label + path,
217
old_tree.get_file(file_id).readlines(),
359
222
for path, file_id, kind in delta.added:
361
print >>to_file, '=== added %s %r' % (kind, path.encode('utf8'))
362
old_name = '%s%s\t%s' % (old_label, path, EPOCH_DATE)
363
new_name = '%s%s\t%s' % (new_label, path,
364
_patch_header_date(new_tree, file_id, path))
365
new_tree.inventory[file_id].diff(diff_file, new_name, new_tree,
366
old_name, None, None, to_file,
368
for (old_path, new_path, file_id, kind,
369
text_modified, meta_modified) in delta.renamed:
371
prop_str = get_prop_change(meta_modified)
372
print >>to_file, '=== renamed %s %r => %r%s' % (
373
kind, old_path.encode('utf8'),
374
new_path.encode('utf8'), prop_str)
375
old_name = '%s%s\t%s' % (old_label, old_path,
376
_patch_header_date(old_tree, file_id,
378
new_name = '%s%s\t%s' % (new_label, new_path,
379
_patch_header_date(new_tree, file_id,
381
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
383
text_modified, kind, to_file, diff_file)
384
for path, file_id, kind, text_modified, meta_modified in delta.modified:
386
prop_str = get_prop_change(meta_modified)
387
print >>to_file, '=== modified %s %r%s' % (kind, path.encode('utf8'), prop_str)
388
old_name = '%s%s\t%s' % (old_label, path,
389
_patch_header_date(old_tree, file_id, path))
390
new_name = '%s%s\t%s' % (new_label, path,
391
_patch_header_date(new_tree, file_id, path))
223
print >>to_file, '*** added %s %r' % (kind, path)
228
new_tree.get_file(file_id).readlines(),
231
for old_path, new_path, file_id, kind, text_modified in delta.renamed:
232
print >>to_file, '*** renamed %s %r => %r' % (kind, old_path, new_path)
392
233
if text_modified:
393
_maybe_diff_file_or_symlink(old_name, old_tree, file_id,
395
True, kind, to_file, diff_file)
400
def _patch_header_date(tree, file_id, path):
401
"""Returns a timestamp suitable for use in a patch header."""
402
tm = time.gmtime(tree.get_file_mtime(file_id, path))
403
return time.strftime('%Y-%m-%d %H:%M:%S +0000', tm)
406
def _raise_if_nonexistent(paths, old_tree, new_tree):
407
"""Complain if paths are not in either inventory or tree.
409
It's OK with the files exist in either tree's inventory, or
410
if they exist in the tree but are not versioned.
412
This can be used by operations such as bzr status that can accept
413
unknown or ignored files.
415
mutter("check paths: %r", paths)
418
s = old_tree.filter_unversioned_files(paths)
419
s = new_tree.filter_unversioned_files(s)
420
s = [path for path in s if not new_tree.has_filename(path)]
422
raise errors.PathsDoNotExist(sorted(s))
425
def get_prop_change(meta_modified):
427
return " (properties changed)"
432
def _maybe_diff_file_or_symlink(old_path, old_tree, file_id,
433
new_path, new_tree, text_modified,
434
kind, to_file, diff_file):
436
new_entry = new_tree.inventory[file_id]
437
old_tree.inventory[file_id].diff(diff_file,
234
diff_file(old_label + old_path,
235
old_tree.get_file(file_id).readlines(),
236
new_label + new_path,
237
new_tree.get_file(file_id).readlines(),
240
for path, file_id, kind in delta.modified:
241
print >>to_file, '*** modified %s %r' % (kind, path)
243
diff_file(old_label + path,
244
old_tree.get_file(file_id).readlines(),
246
new_tree.get_file(file_id).readlines(),