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  • Committer: John Arbash Meinel
  • Date: 2010-01-13 16:23:07 UTC
  • mto: (4634.119.7 2.0)
  • mto: This revision was merged to the branch mainline in revision 4959.
  • Revision ID: john@arbash-meinel.com-20100113162307-0bs82td16gzih827
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bzrlib/diff.py
1
 
# Copyright (C) 2005-2014 Canonical Ltd.
 
1
# Copyright (C) 2004, 2005, 2006 Canonical Ltd.
2
2
#
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
16
 
17
 
from __future__ import absolute_import
18
 
 
19
17
import difflib
20
18
import os
21
19
import re
 
20
import shutil
22
21
import sys
23
22
 
24
 
from .lazy_import import lazy_import
 
23
from bzrlib.lazy_import import lazy_import
25
24
lazy_import(globals(), """
26
25
import errno
27
 
import patiencediff
28
26
import subprocess
29
27
import tempfile
 
28
import time
30
29
 
31
 
from breezy import (
32
 
    cleanup,
33
 
    controldir,
 
30
from bzrlib import (
 
31
    branch as _mod_branch,
 
32
    bzrdir,
 
33
    commands,
 
34
    errors,
34
35
    osutils,
 
36
    patiencediff,
35
37
    textfile,
36
38
    timestamp,
37
39
    views,
38
40
    )
39
 
 
40
 
from breezy.workingtree import WorkingTree
41
 
from breezy.i18n import gettext
42
41
""")
43
42
 
44
 
from . import (
45
 
    errors,
46
 
    )
47
 
from .registry import (
48
 
    Registry,
49
 
    )
50
 
from .sixish import text_type
51
 
from .trace import mutter, note, warning
52
 
from .tree import FileTimestampUnavailable
53
 
 
54
 
 
55
 
DEFAULT_CONTEXT_AMOUNT = 3
 
43
from bzrlib.symbol_versioning import (
 
44
    deprecated_function,
 
45
    )
 
46
from bzrlib.trace import mutter, note, warning
56
47
 
57
48
 
58
49
# TODO: Rather than building a changeset object, we should probably
69
60
        self.opcodes = None
70
61
 
71
62
 
72
 
def internal_diff(old_label, oldlines, new_label, newlines, to_file,
 
63
def internal_diff(old_filename, oldlines, new_filename, newlines, to_file,
73
64
                  allow_binary=False, sequence_matcher=None,
74
 
                  path_encoding='utf8', context_lines=DEFAULT_CONTEXT_AMOUNT):
 
65
                  path_encoding='utf8'):
75
66
    # FIXME: difflib is wrong if there is no trailing newline.
76
67
    # The syntax used by patch seems to be "\ No newline at
77
68
    # end of file" following the last diff line from that
82
73
    # In the meantime we at least make sure the patch isn't
83
74
    # mangled.
84
75
 
 
76
 
 
77
    # Special workaround for Python2.3, where difflib fails if
 
78
    # both sequences are empty.
 
79
    if not oldlines and not newlines:
 
80
        return
 
81
 
85
82
    if allow_binary is False:
86
83
        textfile.check_text_lines(oldlines)
87
84
        textfile.check_text_lines(newlines)
88
85
 
89
86
    if sequence_matcher is None:
90
87
        sequence_matcher = patiencediff.PatienceSequenceMatcher
91
 
    ud = unified_diff_bytes(
92
 
        oldlines, newlines,
93
 
        fromfile=old_label.encode(path_encoding, 'replace'),
94
 
        tofile=new_label.encode(path_encoding, 'replace'),
95
 
        n=context_lines, sequencematcher=sequence_matcher)
 
88
    ud = patiencediff.unified_diff(oldlines, newlines,
 
89
                      fromfile=old_filename.encode(path_encoding),
 
90
                      tofile=new_filename.encode(path_encoding),
 
91
                      sequencematcher=sequence_matcher)
96
92
 
97
93
    ud = list(ud)
98
 
    if len(ud) == 0:  # Identical contents, nothing to do
 
94
    if len(ud) == 0: # Identical contents, nothing to do
99
95
        return
100
96
    # work-around for difflib being too smart for its own good
101
97
    # if /dev/null is "1,0", patch won't recognize it as /dev/null
102
98
    if not oldlines:
103
 
        ud[2] = ud[2].replace(b'-1,0', b'-0,0')
 
99
        ud[2] = ud[2].replace('-1,0', '-0,0')
104
100
    elif not newlines:
105
 
        ud[2] = ud[2].replace(b'+1,0', b'+0,0')
 
101
        ud[2] = ud[2].replace('+1,0', '+0,0')
106
102
 
107
103
    for line in ud:
108
104
        to_file.write(line)
109
 
        if not line.endswith(b'\n'):
110
 
            to_file.write(b"\n\\ No newline at end of file\n")
111
 
    to_file.write(b'\n')
112
 
 
113
 
 
114
 
def unified_diff_bytes(a, b, fromfile=b'', tofile=b'', fromfiledate=b'',
115
 
                       tofiledate=b'', n=3, lineterm=b'\n', sequencematcher=None):
116
 
    r"""
117
 
    Compare two sequences of lines; generate the delta as a unified diff.
118
 
 
119
 
    Unified diffs are a compact way of showing line changes and a few
120
 
    lines of context.  The number of context lines is set by 'n' which
121
 
    defaults to three.
122
 
 
123
 
    By default, the diff control lines (those with ---, +++, or @@) are
124
 
    created with a trailing newline.  This is helpful so that inputs
125
 
    created from file.readlines() result in diffs that are suitable for
126
 
    file.writelines() since both the inputs and outputs have trailing
127
 
    newlines.
128
 
 
129
 
    For inputs that do not have trailing newlines, set the lineterm
130
 
    argument to "" so that the output will be uniformly newline free.
131
 
 
132
 
    The unidiff format normally has a header for filenames and modification
133
 
    times.  Any or all of these may be specified using strings for
134
 
    'fromfile', 'tofile', 'fromfiledate', and 'tofiledate'.  The modification
135
 
    times are normally expressed in the format returned by time.ctime().
136
 
 
137
 
    Example:
138
 
 
139
 
    >>> for line in bytes_unified_diff(b'one two three four'.split(),
140
 
    ...             b'zero one tree four'.split(), b'Original', b'Current',
141
 
    ...             b'Sat Jan 26 23:30:50 1991', b'Fri Jun 06 10:20:52 2003',
142
 
    ...             lineterm=b''):
143
 
    ...     print line
144
 
    --- Original Sat Jan 26 23:30:50 1991
145
 
    +++ Current Fri Jun 06 10:20:52 2003
146
 
    @@ -1,4 +1,4 @@
147
 
    +zero
148
 
     one
149
 
    -two
150
 
    -three
151
 
    +tree
152
 
     four
153
 
    """
154
 
    if sequencematcher is None:
155
 
        sequencematcher = difflib.SequenceMatcher
156
 
 
157
 
    if fromfiledate:
158
 
        fromfiledate = b'\t' + bytes(fromfiledate)
159
 
    if tofiledate:
160
 
        tofiledate = b'\t' + bytes(tofiledate)
161
 
 
162
 
    started = False
163
 
    for group in sequencematcher(None, a, b).get_grouped_opcodes(n):
164
 
        if not started:
165
 
            yield b'--- %s%s%s' % (fromfile, fromfiledate, lineterm)
166
 
            yield b'+++ %s%s%s' % (tofile, tofiledate, lineterm)
167
 
            started = True
168
 
        i1, i2, j1, j2 = group[0][1], group[-1][2], group[0][3], group[-1][4]
169
 
        yield b"@@ -%d,%d +%d,%d @@%s" % (i1 + 1, i2 - i1, j1 + 1, j2 - j1, lineterm)
170
 
        for tag, i1, i2, j1, j2 in group:
171
 
            if tag == 'equal':
172
 
                for line in a[i1:i2]:
173
 
                    yield b' ' + line
174
 
                continue
175
 
            if tag == 'replace' or tag == 'delete':
176
 
                for line in a[i1:i2]:
177
 
                    yield b'-' + line
178
 
            if tag == 'replace' or tag == 'insert':
179
 
                for line in b[j1:j2]:
180
 
                    yield b'+' + line
 
105
        if not line.endswith('\n'):
 
106
            to_file.write("\n\\ No newline at end of file\n")
 
107
    to_file.write('\n')
181
108
 
182
109
 
183
110
def _spawn_external_diff(diffcmd, capture_errors=True):
184
 
    """Spawn the external diff process, and return the child handle.
 
111
    """Spawn the externall diff process, and return the child handle.
185
112
 
186
113
    :param diffcmd: The command list to spawn
187
114
    :param capture_errors: Capture stderr as well as setting LANG=C
209
136
                                stdout=subprocess.PIPE,
210
137
                                stderr=stderr,
211
138
                                env=env)
212
 
    except OSError as e:
 
139
    except OSError, e:
213
140
        if e.errno == errno.ENOENT:
214
141
            raise errors.NoDiff(str(e))
215
142
        raise
217
144
    return pipe
218
145
 
219
146
 
220
 
# diff style options as of GNU diff v3.2
221
 
style_option_list = ['-c', '-C', '--context',
222
 
                     '-e', '--ed',
223
 
                     '-f', '--forward-ed',
224
 
                     '-q', '--brief',
225
 
                     '--normal',
226
 
                     '-n', '--rcs',
227
 
                     '-u', '-U', '--unified',
228
 
                     '-y', '--side-by-side',
229
 
                     '-D', '--ifdef']
230
 
 
231
 
 
232
 
def default_style_unified(diff_opts):
233
 
    """Default to unified diff style if alternative not specified in diff_opts.
234
 
 
235
 
        diff only allows one style to be specified; they don't override.
236
 
        Note that some of these take optargs, and the optargs can be
237
 
        directly appended to the options.
238
 
        This is only an approximate parser; it doesn't properly understand
239
 
        the grammar.
240
 
 
241
 
    :param diff_opts: List of options for external (GNU) diff.
242
 
    :return: List of options with default style=='unified'.
243
 
    """
244
 
    for s in style_option_list:
245
 
        for j in diff_opts:
246
 
            if j.startswith(s):
247
 
                break
248
 
        else:
249
 
            continue
250
 
        break
251
 
    else:
252
 
        diff_opts.append('-u')
253
 
    return diff_opts
254
 
 
255
 
 
256
 
def external_diff(old_label, oldlines, new_label, newlines, to_file,
 
147
def external_diff(old_filename, oldlines, new_filename, newlines, to_file,
257
148
                  diff_opts):
258
149
    """Display a diff by calling out to the external diff program."""
259
150
    # make sure our own output is properly ordered before the diff
260
151
    to_file.flush()
261
152
 
262
 
    oldtmp_fd, old_abspath = tempfile.mkstemp(prefix='brz-diff-old-')
263
 
    newtmp_fd, new_abspath = tempfile.mkstemp(prefix='brz-diff-new-')
 
153
    oldtmp_fd, old_abspath = tempfile.mkstemp(prefix='bzr-diff-old-')
 
154
    newtmp_fd, new_abspath = tempfile.mkstemp(prefix='bzr-diff-new-')
264
155
    oldtmpf = os.fdopen(oldtmp_fd, 'wb')
265
156
    newtmpf = os.fdopen(newtmp_fd, 'wb')
266
157
 
283
174
        if sys.platform == 'win32':
284
175
            # Popen doesn't do the proper encoding for external commands
285
176
            # Since we are dealing with an ANSI api, use mbcs encoding
286
 
            old_label = old_label.encode('mbcs')
287
 
            new_label = new_label.encode('mbcs')
 
177
            old_filename = old_filename.encode('mbcs')
 
178
            new_filename = new_filename.encode('mbcs')
288
179
        diffcmd = ['diff',
289
 
                   '--label', old_label,
 
180
                   '--label', old_filename,
290
181
                   old_abspath,
291
 
                   '--label', new_label,
 
182
                   '--label', new_filename,
292
183
                   new_abspath,
293
184
                   '--binary',
294
 
                   ]
 
185
                  ]
295
186
 
296
 
        diff_opts = default_style_unified(diff_opts)
 
187
        # diff only allows one style to be specified; they don't override.
 
188
        # note that some of these take optargs, and the optargs can be
 
189
        # directly appended to the options.
 
190
        # this is only an approximate parser; it doesn't properly understand
 
191
        # the grammar.
 
192
        for s in ['-c', '-u', '-C', '-U',
 
193
                  '-e', '--ed',
 
194
                  '-q', '--brief',
 
195
                  '--normal',
 
196
                  '-n', '--rcs',
 
197
                  '-y', '--side-by-side',
 
198
                  '-D', '--ifdef']:
 
199
            for j in diff_opts:
 
200
                if j.startswith(s):
 
201
                    break
 
202
            else:
 
203
                continue
 
204
            break
 
205
        else:
 
206
            diffcmd.append('-u')
297
207
 
298
208
        if diff_opts:
299
209
            diffcmd.extend(diff_opts)
300
210
 
301
211
        pipe = _spawn_external_diff(diffcmd, capture_errors=True)
302
 
        out, err = pipe.communicate()
 
212
        out,err = pipe.communicate()
303
213
        rc = pipe.returncode
304
214
 
305
215
        # internal_diff() adds a trailing newline, add one here for consistency
306
 
        out += b'\n'
 
216
        out += '\n'
307
217
        if rc == 2:
308
218
            # 'diff' gives retcode == 2 for all sorts of errors
309
219
            # one of those is 'Binary files differ'.
316
226
            out, err = pipe.communicate()
317
227
 
318
228
            # Write out the new i18n diff response
319
 
            to_file.write(out + b'\n')
 
229
            to_file.write(out+'\n')
320
230
            if pipe.returncode != 2:
321
231
                raise errors.BzrError(
322
 
                    'external diff failed with exit code 2'
323
 
                    ' when run with LANG=C and LC_ALL=C,'
324
 
                    ' but not when run natively: %r' % (diffcmd,))
 
232
                               'external diff failed with exit code 2'
 
233
                               ' when run with LANG=C and LC_ALL=C,'
 
234
                               ' but not when run natively: %r' % (diffcmd,))
325
235
 
326
 
            first_line = lang_c_out.split(b'\n', 1)[0]
 
236
            first_line = lang_c_out.split('\n', 1)[0]
327
237
            # Starting with diffutils 2.8.4 the word "binary" was dropped.
328
 
            m = re.match(b'^(binary )?files.*differ$', first_line, re.I)
 
238
            m = re.match('^(binary )?files.*differ$', first_line, re.I)
329
239
            if m is None:
330
240
                raise errors.BzrError('external diff failed with exit code 2;'
331
241
                                      ' command: %r' % (diffcmd,))
344
254
                msg = 'exit code %d' % rc
345
255
 
346
256
            raise errors.BzrError('external diff failed with %s; command: %r'
347
 
                                  % (msg, diffcmd))
 
257
                                  % (rc, diffcmd))
 
258
 
348
259
 
349
260
    finally:
350
261
        oldtmpf.close()                 # and delete
351
262
        newtmpf.close()
352
 
 
353
 
        def cleanup(path):
354
 
            # Warn in case the file couldn't be deleted (in case windows still
355
 
            # holds the file open, but not if the files have already been
356
 
            # deleted)
357
 
            try:
358
 
                os.remove(path)
359
 
            except OSError as e:
360
 
                if e.errno not in (errno.ENOENT,):
361
 
                    warning('Failed to delete temporary file: %s %s', path, e)
362
 
 
363
 
        cleanup(old_abspath)
364
 
        cleanup(new_abspath)
365
 
 
366
 
 
367
 
def get_trees_and_branches_to_diff_locked(
368
 
        path_list, revision_specs, old_url, new_url, exit_stack, apply_view=True):
 
263
        # Clean up. Warn in case the files couldn't be deleted
 
264
        # (in case windows still holds the file open, but not
 
265
        # if the files have already been deleted)
 
266
        try:
 
267
            os.remove(old_abspath)
 
268
        except OSError, e:
 
269
            if e.errno not in (errno.ENOENT,):
 
270
                warning('Failed to delete temporary file: %s %s',
 
271
                        old_abspath, e)
 
272
        try:
 
273
            os.remove(new_abspath)
 
274
        except OSError:
 
275
            if e.errno not in (errno.ENOENT,):
 
276
                warning('Failed to delete temporary file: %s %s',
 
277
                        new_abspath, e)
 
278
 
 
279
 
 
280
def _get_trees_to_diff(path_list, revision_specs, old_url, new_url,
 
281
    apply_view=True):
369
282
    """Get the trees and specific files to diff given a list of paths.
370
283
 
371
284
    This method works out the trees to be diff'ed and the files of
382
295
    :param new_url:
383
296
        The url of the new branch or tree. If None, the tree to use is
384
297
        taken from the first path, if any, or the current working tree.
385
 
    :param exit_stack:
386
 
        an ExitStack object. get_trees_and_branches_to_diff
387
 
        will register cleanups that must be run to unlock the trees, etc.
388
298
    :param apply_view:
389
299
        if True and a view is set, apply the view or check that the paths
390
300
        are within it
391
301
    :returns:
392
 
        a tuple of (old_tree, new_tree, old_branch, new_branch,
393
 
        specific_files, extra_trees) where extra_trees is a sequence of
394
 
        additional trees to search in for file-ids.  The trees and branches
395
 
        will be read-locked until the cleanups registered via the exit_stack
396
 
        param are run.
 
302
        a tuple of (old_tree, new_tree, specific_files, extra_trees) where
 
303
        extra_trees is a sequence of additional trees to search in for
 
304
        file-ids.
397
305
    """
398
306
    # Get the old and new revision specs
399
307
    old_revision_spec = None
422
330
        default_location = path_list[0]
423
331
        other_paths = path_list[1:]
424
332
 
425
 
    def lock_tree_or_branch(wt, br):
426
 
        if wt is not None:
427
 
            exit_stack.enter_context(wt.lock_read())
428
 
        elif br is not None:
429
 
            exit_stack.enter_context(br.lock_read())
430
 
 
431
333
    # Get the old location
432
334
    specific_files = []
433
335
    if old_url is None:
434
336
        old_url = default_location
435
337
    working_tree, branch, relpath = \
436
 
        controldir.ControlDir.open_containing_tree_or_branch(old_url)
437
 
    lock_tree_or_branch(working_tree, branch)
 
338
        bzrdir.BzrDir.open_containing_tree_or_branch(old_url)
438
339
    if consider_relpath and relpath != '':
439
340
        if working_tree is not None and apply_view:
440
341
            views.check_path_in_view(working_tree, relpath)
441
342
        specific_files.append(relpath)
442
343
    old_tree = _get_tree_to_diff(old_revision_spec, working_tree, branch)
443
 
    old_branch = branch
444
344
 
445
345
    # Get the new location
446
346
    if new_url is None:
447
347
        new_url = default_location
448
348
    if new_url != old_url:
449
349
        working_tree, branch, relpath = \
450
 
            controldir.ControlDir.open_containing_tree_or_branch(new_url)
451
 
        lock_tree_or_branch(working_tree, branch)
 
350
            bzrdir.BzrDir.open_containing_tree_or_branch(new_url)
452
351
        if consider_relpath and relpath != '':
453
352
            if working_tree is not None and apply_view:
454
353
                views.check_path_in_view(working_tree, relpath)
455
354
            specific_files.append(relpath)
456
355
    new_tree = _get_tree_to_diff(new_revision_spec, working_tree, branch,
457
 
                                 basis_is_default=working_tree is None)
458
 
    new_branch = branch
 
356
        basis_is_default=working_tree is None)
459
357
 
460
358
    # Get the specific files (all files is None, no files is [])
461
359
    if make_paths_wt_relative and working_tree is not None:
462
 
        other_paths = working_tree.safe_relpath_files(
463
 
            other_paths,
 
360
        try:
 
361
            from bzrlib.builtins import safe_relpath_files
 
362
            other_paths = safe_relpath_files(working_tree, other_paths,
464
363
            apply_view=apply_view)
 
364
        except errors.FileInWrongBranch:
 
365
            raise errors.BzrCommandError("Files are in different branches")
465
366
    specific_files.extend(other_paths)
466
367
    if len(specific_files) == 0:
467
368
        specific_files = None
468
 
        if (working_tree is not None and working_tree.supports_views() and
469
 
                apply_view):
 
369
        if (working_tree is not None and working_tree.supports_views()
 
370
            and apply_view):
470
371
            view_files = working_tree.views.lookup_view()
471
372
            if view_files:
472
373
                specific_files = view_files
473
374
                view_str = views.view_display_str(view_files)
474
 
                note(gettext("*** Ignoring files outside view. View is %s") % view_str)
 
375
                note("*** Ignoring files outside view. View is %s" % view_str)
475
376
 
476
377
    # Get extra trees that ought to be searched for file-ids
477
378
    extra_trees = None
478
379
    if working_tree is not None and working_tree not in (old_tree, new_tree):
479
380
        extra_trees = (working_tree,)
480
 
    return (old_tree, new_tree, old_branch, new_branch,
481
 
            specific_files, extra_trees)
482
 
 
 
381
    return old_tree, new_tree, specific_files, extra_trees
483
382
 
484
383
def _get_tree_to_diff(spec, tree=None, branch=None, basis_is_default=True):
485
384
    if branch is None and tree is not None:
500
399
                    old_label='a/', new_label='b/',
501
400
                    extra_trees=None,
502
401
                    path_encoding='utf8',
503
 
                    using=None,
504
 
                    format_cls=None,
505
 
                    context=DEFAULT_CONTEXT_AMOUNT):
 
402
                    using=None):
506
403
    """Show in text form the changes from one tree to another.
507
404
 
508
 
    :param to_file: The output stream.
509
 
    :param specific_files: Include only changes to these files - None for all
510
 
        changes.
511
 
    :param external_diff_options: If set, use an external GNU diff and pass
512
 
        these options.
513
 
    :param extra_trees: If set, more Trees to use for looking up file ids
514
 
    :param path_encoding: If set, the path will be encoded as specified,
515
 
        otherwise is supposed to be utf8
516
 
    :param format_cls: Formatter class (DiffTree subclass)
 
405
    to_file
 
406
        The output stream.
 
407
 
 
408
    specific_files
 
409
        Include only changes to these files - None for all changes.
 
410
 
 
411
    external_diff_options
 
412
        If set, use an external GNU diff and pass these options.
 
413
 
 
414
    extra_trees
 
415
        If set, more Trees to use for looking up file ids
 
416
 
 
417
    path_encoding
 
418
        If set, the path will be encoded as specified, otherwise is supposed
 
419
        to be utf8
517
420
    """
518
 
    if context is None:
519
 
        context = DEFAULT_CONTEXT_AMOUNT
520
 
    if format_cls is None:
521
 
        format_cls = DiffTree
522
 
    with cleanup.ExitStack() as exit_stack:
523
 
        exit_stack.enter_context(old_tree.lock_read())
 
421
    old_tree.lock_read()
 
422
    try:
524
423
        if extra_trees is not None:
525
424
            for tree in extra_trees:
526
 
                exit_stack.enter_context(tree.lock_read())
527
 
        exit_stack.enter_context(new_tree.lock_read())
528
 
        differ = format_cls.from_trees_options(old_tree, new_tree, to_file,
529
 
                                               path_encoding,
530
 
                                               external_diff_options,
531
 
                                               old_label, new_label, using,
532
 
                                               context_lines=context)
533
 
        return differ.show_diff(specific_files, extra_trees)
534
 
 
535
 
 
536
 
def _patch_header_date(tree, path):
 
425
                tree.lock_read()
 
426
        new_tree.lock_read()
 
427
        try:
 
428
            differ = DiffTree.from_trees_options(old_tree, new_tree, to_file,
 
429
                                                 path_encoding,
 
430
                                                 external_diff_options,
 
431
                                                 old_label, new_label, using)
 
432
            return differ.show_diff(specific_files, extra_trees)
 
433
        finally:
 
434
            new_tree.unlock()
 
435
            if extra_trees is not None:
 
436
                for tree in extra_trees:
 
437
                    tree.unlock()
 
438
    finally:
 
439
        old_tree.unlock()
 
440
 
 
441
 
 
442
def _patch_header_date(tree, file_id, path):
537
443
    """Returns a timestamp suitable for use in a patch header."""
538
 
    try:
539
 
        mtime = tree.get_file_mtime(path)
540
 
    except FileTimestampUnavailable:
541
 
        mtime = 0
 
444
    mtime = tree.get_file_mtime(file_id, path)
542
445
    return timestamp.format_patch_date(mtime)
543
446
 
544
447
 
545
448
def get_executable_change(old_is_x, new_is_x):
546
 
    descr = {True: b"+x", False: b"-x", None: b"??"}
 
449
    descr = { True:"+x", False:"-x", None:"??" }
547
450
    if old_is_x != new_is_x:
548
 
        return [b"%s to %s" % (descr[old_is_x], descr[new_is_x],)]
 
451
        return ["%s to %s" % (descr[old_is_x], descr[new_is_x],)]
549
452
    else:
550
453
        return []
551
454
 
582
485
                     diff_tree.to_file, diff_tree.path_encoding)
583
486
 
584
487
    @staticmethod
585
 
    def _diff_many(differs, old_path, new_path, old_kind, new_kind):
 
488
    def _diff_many(differs, file_id, old_path, new_path, old_kind, new_kind):
586
489
        for file_differ in differs:
587
 
            result = file_differ.diff(old_path, new_path, old_kind, new_kind)
 
490
            result = file_differ.diff(file_id, old_path, new_path, old_kind,
 
491
                                      new_kind)
588
492
            if result is not DiffPath.CANNOT_DIFF:
589
493
                return result
590
494
        else:
597
501
    Represents kind change as deletion + creation.  Uses the other differs
598
502
    to do this.
599
503
    """
600
 
 
601
504
    def __init__(self, differs):
602
505
        self.differs = differs
603
506
 
608
511
    def from_diff_tree(klass, diff_tree):
609
512
        return klass(diff_tree.differs)
610
513
 
611
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
514
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
612
515
        """Perform comparison
613
516
 
 
517
        :param file_id: The file_id of the file to compare
614
518
        :param old_path: Path of the file in the old tree
615
519
        :param new_path: Path of the file in the new tree
616
520
        :param old_kind: Old file-kind of the file
618
522
        """
619
523
        if None in (old_kind, new_kind):
620
524
            return DiffPath.CANNOT_DIFF
621
 
        result = DiffPath._diff_many(
622
 
            self.differs, old_path, new_path, old_kind, None)
 
525
        result = DiffPath._diff_many(self.differs, file_id, old_path,
 
526
                                       new_path, old_kind, None)
623
527
        if result is DiffPath.CANNOT_DIFF:
624
528
            return result
625
 
        return DiffPath._diff_many(
626
 
            self.differs, old_path, new_path, None, new_kind)
627
 
 
628
 
 
629
 
class DiffTreeReference(DiffPath):
630
 
 
631
 
    def diff(self, old_path, new_path, old_kind, new_kind):
632
 
        """Perform comparison between two tree references.  (dummy)
633
 
 
634
 
        """
635
 
        if 'tree-reference' not in (old_kind, new_kind):
636
 
            return self.CANNOT_DIFF
637
 
        if old_kind not in ('tree-reference', None):
638
 
            return self.CANNOT_DIFF
639
 
        if new_kind not in ('tree-reference', None):
640
 
            return self.CANNOT_DIFF
641
 
        return self.CHANGED
 
529
        return DiffPath._diff_many(self.differs, file_id, old_path, new_path,
 
530
                                     None, new_kind)
642
531
 
643
532
 
644
533
class DiffDirectory(DiffPath):
645
534
 
646
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
535
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
647
536
        """Perform comparison between two directories.  (dummy)
648
537
 
649
538
        """
658
547
 
659
548
class DiffSymlink(DiffPath):
660
549
 
661
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
550
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
662
551
        """Perform comparison between two symlinks
663
552
 
 
553
        :param file_id: The file_id of the file to compare
664
554
        :param old_path: Path of the file in the old tree
665
555
        :param new_path: Path of the file in the new tree
666
556
        :param old_kind: Old file-kind of the file
669
559
        if 'symlink' not in (old_kind, new_kind):
670
560
            return self.CANNOT_DIFF
671
561
        if old_kind == 'symlink':
672
 
            old_target = self.old_tree.get_symlink_target(old_path)
 
562
            old_target = self.old_tree.get_symlink_target(file_id)
673
563
        elif old_kind is None:
674
564
            old_target = None
675
565
        else:
676
566
            return self.CANNOT_DIFF
677
567
        if new_kind == 'symlink':
678
 
            new_target = self.new_tree.get_symlink_target(new_path)
 
568
            new_target = self.new_tree.get_symlink_target(file_id)
679
569
        elif new_kind is None:
680
570
            new_target = None
681
571
        else:
684
574
 
685
575
    def diff_symlink(self, old_target, new_target):
686
576
        if old_target is None:
687
 
            self.to_file.write(b'=== target is \'%s\'\n' %
688
 
                               new_target.encode(self.path_encoding, 'replace'))
 
577
            self.to_file.write('=== target is %r\n' % new_target)
689
578
        elif new_target is None:
690
 
            self.to_file.write(b'=== target was \'%s\'\n' %
691
 
                               old_target.encode(self.path_encoding, 'replace'))
 
579
            self.to_file.write('=== target was %r\n' % old_target)
692
580
        else:
693
 
            self.to_file.write(b'=== target changed \'%s\' => \'%s\'\n' %
694
 
                               (old_target.encode(self.path_encoding, 'replace'),
695
 
                                new_target.encode(self.path_encoding, 'replace')))
 
581
            self.to_file.write('=== target changed %r => %r\n' %
 
582
                              (old_target, new_target))
696
583
        return self.CHANGED
697
584
 
698
585
 
703
590
    EPOCH_DATE = '1970-01-01 00:00:00 +0000'
704
591
 
705
592
    def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',
706
 
                 old_label='', new_label='', text_differ=internal_diff,
707
 
                 context_lines=DEFAULT_CONTEXT_AMOUNT):
 
593
                 old_label='', new_label='', text_differ=internal_diff):
708
594
        DiffPath.__init__(self, old_tree, new_tree, to_file, path_encoding)
709
595
        self.text_differ = text_differ
710
596
        self.old_label = old_label
711
597
        self.new_label = new_label
712
598
        self.path_encoding = path_encoding
713
 
        self.context_lines = context_lines
714
599
 
715
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
600
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
716
601
        """Compare two files in unified diff format
717
602
 
 
603
        :param file_id: The file_id of the file to compare
718
604
        :param old_path: Path of the file in the old tree
719
605
        :param new_path: Path of the file in the new tree
720
606
        :param old_kind: Old file-kind of the file
722
608
        """
723
609
        if 'file' not in (old_kind, new_kind):
724
610
            return self.CANNOT_DIFF
 
611
        from_file_id = to_file_id = file_id
725
612
        if old_kind == 'file':
726
 
            old_date = _patch_header_date(self.old_tree, old_path)
 
613
            old_date = _patch_header_date(self.old_tree, file_id, old_path)
727
614
        elif old_kind is None:
728
615
            old_date = self.EPOCH_DATE
 
616
            from_file_id = None
729
617
        else:
730
618
            return self.CANNOT_DIFF
731
619
        if new_kind == 'file':
732
 
            new_date = _patch_header_date(self.new_tree, new_path)
 
620
            new_date = _patch_header_date(self.new_tree, file_id, new_path)
733
621
        elif new_kind is None:
734
622
            new_date = self.EPOCH_DATE
 
623
            to_file_id = None
735
624
        else:
736
625
            return self.CANNOT_DIFF
737
 
        from_label = '%s%s\t%s' % (self.old_label, old_path,
738
 
                                   old_date)
739
 
        to_label = '%s%s\t%s' % (self.new_label, new_path,
740
 
                                 new_date)
741
 
        return self.diff_text(old_path, new_path, from_label, to_label)
 
626
        from_label = '%s%s\t%s' % (self.old_label, old_path, old_date)
 
627
        to_label = '%s%s\t%s' % (self.new_label, new_path, new_date)
 
628
        return self.diff_text(from_file_id, to_file_id, from_label, to_label,
 
629
            old_path, new_path)
742
630
 
743
 
    def diff_text(self, from_path, to_path, from_label, to_label):
 
631
    def diff_text(self, from_file_id, to_file_id, from_label, to_label,
 
632
        from_path=None, to_path=None):
744
633
        """Diff the content of given files in two trees
745
634
 
746
 
        :param from_path: The path in the from tree. If None,
 
635
        :param from_file_id: The id of the file in the from tree.  If None,
747
636
            the file is not present in the from tree.
748
 
        :param to_path: The path in the to tree. This may refer
749
 
            to a different file from from_path.  If None,
 
637
        :param to_file_id: The id of the file in the to tree.  This may refer
 
638
            to a different file from from_file_id.  If None,
750
639
            the file is not present in the to tree.
 
640
        :param from_path: The path in the from tree or None if unknown.
 
641
        :param to_path: The path in the to tree or None if unknown.
751
642
        """
752
 
        def _get_text(tree, path):
753
 
            if path is None:
754
 
                return []
755
 
            try:
756
 
                return tree.get_file_lines(path)
757
 
            except errors.NoSuchFile:
 
643
        def _get_text(tree, file_id, path):
 
644
            if file_id is not None:
 
645
                return tree.get_file(file_id, path).readlines()
 
646
            else:
758
647
                return []
759
648
        try:
760
 
            from_text = _get_text(self.old_tree, from_path)
761
 
            to_text = _get_text(self.new_tree, to_path)
 
649
            from_text = _get_text(self.old_tree, from_file_id, from_path)
 
650
            to_text = _get_text(self.new_tree, to_file_id, to_path)
762
651
            self.text_differ(from_label, from_text, to_label, to_text,
763
 
                             self.to_file, path_encoding=self.path_encoding,
764
 
                             context_lines=self.context_lines)
 
652
                             self.to_file)
765
653
        except errors.BinaryFile:
766
654
            self.to_file.write(
767
 
                ("Binary files %s%s and %s%s differ\n" %
768
 
                 (self.old_label, from_path, self.new_label, to_path)).encode(self.path_encoding, 'replace'))
 
655
                  ("Binary files %s and %s differ\n" %
 
656
                  (from_label, to_label)).encode(self.path_encoding))
769
657
        return self.CHANGED
770
658
 
771
659
 
775
663
                 path_encoding='utf-8'):
776
664
        DiffPath.__init__(self, old_tree, new_tree, to_file, path_encoding)
777
665
        self.command_template = command_template
778
 
        self._root = osutils.mkdtemp(prefix='brz-diff-')
 
666
        self._root = osutils.mkdtemp(prefix='bzr-diff-')
779
667
 
780
668
    @classmethod
781
 
    def from_string(klass, command_template, old_tree, new_tree, to_file,
 
669
    def from_string(klass, command_string, old_tree, new_tree, to_file,
782
670
                    path_encoding='utf-8'):
 
671
        command_template = commands.shlex_split_unicode(command_string)
 
672
        command_template.extend(['%(old_path)s', '%(new_path)s'])
783
673
        return klass(command_template, old_tree, new_tree, to_file,
784
674
                     path_encoding)
785
675
 
786
676
    @classmethod
787
 
    def make_from_diff_tree(klass, command_string, external_diff_options=None):
 
677
    def make_from_diff_tree(klass, command_string):
788
678
        def from_diff_tree(diff_tree):
789
 
            full_command_string = [command_string]
790
 
            if external_diff_options is not None:
791
 
                full_command_string += ' ' + external_diff_options
792
 
            return klass.from_string(full_command_string, diff_tree.old_tree,
 
679
            return klass.from_string(command_string, diff_tree.old_tree,
793
680
                                     diff_tree.new_tree, diff_tree.to_file)
794
681
        return from_diff_tree
795
682
 
796
683
    def _get_command(self, old_path, new_path):
797
684
        my_map = {'old_path': old_path, 'new_path': new_path}
798
 
        command = [t.format(**my_map) for t in
799
 
                   self.command_template]
800
 
        if command == self.command_template:
801
 
            command += [old_path, new_path]
802
 
        if sys.platform == 'win32':  # Popen doesn't accept unicode on win32
803
 
            command_encoded = []
804
 
            for c in command:
805
 
                if isinstance(c, text_type):
806
 
                    command_encoded.append(c.encode('mbcs'))
807
 
                else:
808
 
                    command_encoded.append(c)
809
 
            return command_encoded
810
 
        else:
811
 
            return command
 
685
        return [t % my_map for t in self.command_template]
812
686
 
813
687
    def _execute(self, old_path, new_path):
814
688
        command = self._get_command(old_path, new_path)
815
689
        try:
816
690
            proc = subprocess.Popen(command, stdout=subprocess.PIPE,
817
691
                                    cwd=self._root)
818
 
        except OSError as e:
 
692
        except OSError, e:
819
693
            if e.errno == errno.ENOENT:
820
694
                raise errors.ExecutableMissing(command[0])
821
695
            else:
822
696
                raise
823
697
        self.to_file.write(proc.stdout.read())
824
 
        proc.stdout.close()
825
698
        return proc.wait()
826
699
 
827
700
    def _try_symlink_root(self, tree, prefix):
828
 
        if (getattr(tree, 'abspath', None) is None or
829
 
                not osutils.host_os_dereferences_symlinks()):
 
701
        if (getattr(tree, 'abspath', None) is None
 
702
            or not osutils.host_os_dereferences_symlinks()):
830
703
            return False
831
704
        try:
832
705
            os.symlink(tree.abspath(''), osutils.pathjoin(self._root, prefix))
833
 
        except OSError as e:
 
706
        except OSError, e:
834
707
            if e.errno != errno.EEXIST:
835
708
                raise
836
709
        return True
837
710
 
838
 
    @staticmethod
839
 
    def _fenc():
840
 
        """Returns safe encoding for passing file path to diff tool"""
841
 
        if sys.platform == 'win32':
842
 
            return 'mbcs'
843
 
        else:
844
 
            # Don't fallback to 'utf-8' because subprocess may not be able to
845
 
            # handle utf-8 correctly when locale is not utf-8.
846
 
            return sys.getfilesystemencoding() or 'ascii'
847
 
 
848
 
    def _is_safepath(self, path):
849
 
        """Return true if `path` may be able to pass to subprocess."""
850
 
        fenc = self._fenc()
851
 
        try:
852
 
            return path == path.encode(fenc).decode(fenc)
853
 
        except UnicodeError:
854
 
            return False
855
 
 
856
 
    def _safe_filename(self, prefix, relpath):
857
 
        """Replace unsafe character in `relpath` then join `self._root`,
858
 
        `prefix` and `relpath`."""
859
 
        fenc = self._fenc()
860
 
        # encoded_str.replace('?', '_') may break multibyte char.
861
 
        # So we should encode, decode, then replace(u'?', u'_')
862
 
        relpath_tmp = relpath.encode(fenc, 'replace').decode(fenc, 'replace')
863
 
        relpath_tmp = relpath_tmp.replace(u'?', u'_')
864
 
        return osutils.pathjoin(self._root, prefix, relpath_tmp)
865
 
 
866
 
    def _write_file(self, relpath, tree, prefix, force_temp=False,
867
 
                    allow_write=False):
868
 
        if not force_temp and isinstance(tree, WorkingTree):
869
 
            full_path = tree.abspath(relpath)
870
 
            if self._is_safepath(full_path):
871
 
                return full_path
872
 
 
873
 
        full_path = self._safe_filename(prefix, relpath)
874
 
        if not force_temp and self._try_symlink_root(tree, prefix):
 
711
    def _write_file(self, file_id, tree, prefix, relpath):
 
712
        full_path = osutils.pathjoin(self._root, prefix, relpath)
 
713
        if self._try_symlink_root(tree, prefix):
875
714
            return full_path
876
715
        parent_dir = osutils.dirname(full_path)
877
716
        try:
878
717
            os.makedirs(parent_dir)
879
 
        except OSError as e:
 
718
        except OSError, e:
880
719
            if e.errno != errno.EEXIST:
881
720
                raise
882
 
        with tree.get_file(relpath) as source, \
883
 
                open(full_path, 'wb') as target:
884
 
            osutils.pumpfile(source, target)
 
721
        source = tree.get_file(file_id, relpath)
885
722
        try:
886
 
            mtime = tree.get_file_mtime(relpath)
887
 
        except FileTimestampUnavailable:
888
 
            pass
889
 
        else:
890
 
            os.utime(full_path, (mtime, mtime))
891
 
        if not allow_write:
892
 
            osutils.make_readonly(full_path)
 
723
            target = open(full_path, 'wb')
 
724
            try:
 
725
                osutils.pumpfile(source, target)
 
726
            finally:
 
727
                target.close()
 
728
        finally:
 
729
            source.close()
 
730
        osutils.make_readonly(full_path)
 
731
        mtime = tree.get_file_mtime(file_id)
 
732
        os.utime(full_path, (mtime, mtime))
893
733
        return full_path
894
734
 
895
 
    def _prepare_files(self, old_path, new_path, force_temp=False,
896
 
                       allow_write_new=False):
897
 
        old_disk_path = self._write_file(
898
 
            old_path, self.old_tree, 'old', force_temp)
899
 
        new_disk_path = self._write_file(
900
 
            new_path, self.new_tree, 'new', force_temp,
901
 
            allow_write=allow_write_new)
 
735
    def _prepare_files(self, file_id, old_path, new_path):
 
736
        old_disk_path = self._write_file(file_id, self.old_tree, 'old',
 
737
                                         old_path)
 
738
        new_disk_path = self._write_file(file_id, self.new_tree, 'new',
 
739
                                         new_path)
902
740
        return old_disk_path, new_disk_path
903
741
 
904
742
    def finish(self):
905
743
        try:
906
744
            osutils.rmtree(self._root)
907
 
        except OSError as e:
 
745
        except OSError, e:
908
746
            if e.errno != errno.ENOENT:
909
747
                mutter("The temporary directory \"%s\" was not "
910
 
                       "cleanly removed: %s." % (self._root, e))
 
748
                        "cleanly removed: %s." % (self._root, e))
911
749
 
912
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
750
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
913
751
        if (old_kind, new_kind) != ('file', 'file'):
914
752
            return DiffPath.CANNOT_DIFF
915
 
        (old_disk_path, new_disk_path) = self._prepare_files(
916
 
            old_path, new_path)
917
 
        self._execute(old_disk_path, new_disk_path)
918
 
 
919
 
    def edit_file(self, old_path, new_path):
920
 
        """Use this tool to edit a file.
921
 
 
922
 
        A temporary copy will be edited, and the new contents will be
923
 
        returned.
924
 
 
925
 
        :return: The new contents of the file.
926
 
        """
927
 
        old_abs_path, new_abs_path = self._prepare_files(
928
 
            old_path, new_path, allow_write_new=True, force_temp=True)
929
 
        command = self._get_command(old_abs_path, new_abs_path)
930
 
        subprocess.call(command, cwd=self._root)
931
 
        with open(new_abs_path, 'rb') as new_file:
932
 
            return new_file.read()
 
753
        self._prepare_files(file_id, old_path, new_path)
 
754
        self._execute(osutils.pathjoin('old', old_path),
 
755
                      osutils.pathjoin('new', new_path))
933
756
 
934
757
 
935
758
class DiffTree(object):
947
770
    # list of factories that can provide instances of DiffPath objects
948
771
    # may be extended by plugins.
949
772
    diff_factories = [DiffSymlink.from_diff_tree,
950
 
                      DiffDirectory.from_diff_tree,
951
 
                      DiffTreeReference.from_diff_tree]
 
773
                      DiffDirectory.from_diff_tree]
952
774
 
953
775
    def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',
954
776
                 diff_text=None, extra_factories=None):
964
786
            DiffPaths"""
965
787
        if diff_text is None:
966
788
            diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
967
 
                                 '', '', internal_diff)
 
789
                                 '', '',  internal_diff)
968
790
        self.old_tree = old_tree
969
791
        self.new_tree = new_tree
970
792
        self.to_file = to_file
978
800
    @classmethod
979
801
    def from_trees_options(klass, old_tree, new_tree, to_file,
980
802
                           path_encoding, external_diff_options, old_label,
981
 
                           new_label, using, context_lines):
 
803
                           new_label, using):
982
804
        """Factory for producing a DiffTree.
983
805
 
984
806
        Designed to accept options used by show_diff_trees.
985
 
 
986
807
        :param old_tree: The tree to show as old in the comparison
987
808
        :param new_tree: The tree to show as new in the comparison
988
809
        :param to_file: File to write comparisons to
994
815
        :param using: Commandline to use to invoke an external diff tool
995
816
        """
996
817
        if using is not None:
997
 
            extra_factories = [DiffFromTool.make_from_diff_tree(
998
 
                using, external_diff_options)]
 
818
            extra_factories = [DiffFromTool.make_from_diff_tree(using)]
999
819
        else:
1000
820
            extra_factories = []
1001
821
        if external_diff_options:
1002
822
            opts = external_diff_options.split()
1003
 
 
1004
 
            def diff_file(olab, olines, nlab, nlines, to_file, path_encoding=None, context_lines=None):
1005
 
                """:param path_encoding: not used but required
1006
 
                        to match the signature of internal_diff.
1007
 
                """
 
823
            def diff_file(olab, olines, nlab, nlines, to_file):
1008
824
                external_diff(olab, olines, nlab, nlines, to_file, opts)
1009
825
        else:
1010
826
            diff_file = internal_diff
1011
827
        diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
1012
 
                             old_label, new_label, diff_file, context_lines=context_lines)
 
828
                             old_label, new_label, diff_file)
1013
829
        return klass(old_tree, new_tree, to_file, path_encoding, diff_text,
1014
830
                     extra_factories)
1015
831
 
1016
832
    def show_diff(self, specific_files, extra_trees=None):
1017
833
        """Write tree diff to self.to_file
1018
834
 
1019
 
        :param specific_files: the specific files to compare (recursive)
 
835
        :param sepecific_files: the specific files to compare (recursive)
1020
836
        :param extra_trees: extra trees to use for mapping paths to file_ids
1021
837
        """
1022
838
        try:
1029
845
        # TODO: Generation of pseudo-diffs for added/deleted files could
1030
846
        # be usefully made into a much faster special case.
1031
847
        iterator = self.new_tree.iter_changes(self.old_tree,
1032
 
                                              specific_files=specific_files,
1033
 
                                              extra_trees=extra_trees,
1034
 
                                              require_versioned=True)
 
848
                                               specific_files=specific_files,
 
849
                                               extra_trees=extra_trees,
 
850
                                               require_versioned=True)
1035
851
        has_changes = 0
1036
 
 
1037
852
        def changes_key(change):
1038
 
            old_path, new_path = change.path
 
853
            old_path, new_path = change[1]
1039
854
            path = new_path
1040
855
            if path is None:
1041
856
                path = old_path
1042
857
            return path
1043
 
 
1044
858
        def get_encoded_path(path):
1045
859
            if path is not None:
1046
860
                return path.encode(self.path_encoding, "replace")
1047
 
        for change in sorted(iterator, key=changes_key):
 
861
        for (file_id, paths, changed_content, versioned, parent, name, kind,
 
862
             executable) in sorted(iterator, key=changes_key):
1048
863
            # The root does not get diffed, and items with no known kind (that
1049
864
            # is, missing) in both trees are skipped as well.
1050
 
            if change.parent_id == (None, None) or change.kind == (None, None):
1051
 
                continue
1052
 
            if change.kind[0] == 'symlink' and not self.new_tree.supports_symlinks():
1053
 
                warning(
1054
 
                    'Ignoring "%s" as symlinks are not '
1055
 
                    'supported on this filesystem.' % (change.path[0],))
1056
 
                continue
1057
 
            oldpath, newpath = change.path
1058
 
            oldpath_encoded = get_encoded_path(change.path[0])
1059
 
            newpath_encoded = get_encoded_path(change.path[1])
1060
 
            old_present = (change.kind[0] is not None and change.versioned[0])
1061
 
            new_present = (change.kind[1] is not None and change.versioned[1])
1062
 
            executable = change.executable
1063
 
            kind = change.kind
1064
 
            renamed = (change.parent_id[0], change.name[0]) != (change.parent_id[1], change.name[1])
 
865
            if parent == (None, None) or kind == (None, None):
 
866
                continue
 
867
            oldpath, newpath = paths
 
868
            oldpath_encoded = get_encoded_path(paths[0])
 
869
            newpath_encoded = get_encoded_path(paths[1])
 
870
            old_present = (kind[0] is not None and versioned[0])
 
871
            new_present = (kind[1] is not None and versioned[1])
 
872
            renamed = (parent[0], name[0]) != (parent[1], name[1])
1065
873
 
1066
874
            properties_changed = []
1067
 
            properties_changed.extend(
1068
 
                get_executable_change(executable[0], executable[1]))
 
875
            properties_changed.extend(get_executable_change(executable[0], executable[1]))
1069
876
 
1070
877
            if properties_changed:
1071
 
                prop_str = b" (properties changed: %s)" % (
1072
 
                    b", ".join(properties_changed),)
 
878
                prop_str = " (properties changed: %s)" % (", ".join(properties_changed),)
1073
879
            else:
1074
 
                prop_str = b""
 
880
                prop_str = ""
1075
881
 
1076
882
            if (old_present, new_present) == (True, False):
1077
 
                self.to_file.write(b"=== removed %s '%s'\n" %
1078
 
                                   (kind[0].encode('ascii'), oldpath_encoded))
 
883
                self.to_file.write("=== removed %s '%s'\n" %
 
884
                                   (kind[0], oldpath_encoded))
1079
885
                newpath = oldpath
1080
886
            elif (old_present, new_present) == (False, True):
1081
 
                self.to_file.write(b"=== added %s '%s'\n" %
1082
 
                                   (kind[1].encode('ascii'), newpath_encoded))
 
887
                self.to_file.write("=== added %s '%s'\n" %
 
888
                                   (kind[1], newpath_encoded))
1083
889
                oldpath = newpath
1084
890
            elif renamed:
1085
 
                self.to_file.write(b"=== renamed %s '%s' => '%s'%s\n" %
1086
 
                                   (kind[0].encode('ascii'), oldpath_encoded, newpath_encoded, prop_str))
 
891
                self.to_file.write("=== renamed %s '%s' => '%s'%s\n" %
 
892
                    (kind[0], oldpath_encoded, newpath_encoded, prop_str))
1087
893
            else:
1088
894
                # if it was produced by iter_changes, it must be
1089
895
                # modified *somehow*, either content or execute bit.
1090
 
                self.to_file.write(b"=== modified %s '%s'%s\n" % (kind[0].encode('ascii'),
1091
 
                                                                  newpath_encoded, prop_str))
1092
 
            if change.changed_content:
1093
 
                self._diff(oldpath, newpath, kind[0], kind[1])
 
896
                self.to_file.write("=== modified %s '%s'%s\n" % (kind[0],
 
897
                                   newpath_encoded, prop_str))
 
898
            if changed_content:
 
899
                self._diff(file_id, oldpath, newpath, kind[0], kind[1])
1094
900
                has_changes = 1
1095
901
            if renamed:
1096
902
                has_changes = 1
1097
903
        return has_changes
1098
904
 
1099
 
    def diff(self, old_path, new_path):
 
905
    def diff(self, file_id, old_path, new_path):
1100
906
        """Perform a diff of a single file
1101
907
 
 
908
        :param file_id: file-id of the file
1102
909
        :param old_path: The path of the file in the old tree
1103
910
        :param new_path: The path of the file in the new tree
1104
911
        """
1105
 
        if old_path is None:
 
912
        try:
 
913
            old_kind = self.old_tree.kind(file_id)
 
914
        except (errors.NoSuchId, errors.NoSuchFile):
1106
915
            old_kind = None
1107
 
        else:
1108
 
            old_kind = self.old_tree.kind(old_path)
1109
 
        if new_path is None:
 
916
        try:
 
917
            new_kind = self.new_tree.kind(file_id)
 
918
        except (errors.NoSuchId, errors.NoSuchFile):
1110
919
            new_kind = None
1111
 
        else:
1112
 
            new_kind = self.new_tree.kind(new_path)
1113
 
        self._diff(old_path, new_path, old_kind, new_kind)
1114
 
 
1115
 
    def _diff(self, old_path, new_path, old_kind, new_kind):
1116
 
        result = DiffPath._diff_many(
1117
 
            self.differs, old_path, new_path, old_kind, new_kind)
 
920
        self._diff(file_id, old_path, new_path, old_kind, new_kind)
 
921
 
 
922
 
 
923
    def _diff(self, file_id, old_path, new_path, old_kind, new_kind):
 
924
        result = DiffPath._diff_many(self.differs, file_id, old_path,
 
925
                                       new_path, old_kind, new_kind)
1118
926
        if result is DiffPath.CANNOT_DIFF:
1119
927
            error_path = new_path
1120
928
            if error_path is None:
1121
929
                error_path = old_path
1122
930
            raise errors.NoDiffFound(error_path)
1123
 
 
1124
 
 
1125
 
format_registry = Registry()
1126
 
format_registry.register('default', DiffTree)