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  • Committer: Eric Siegerman
  • Date: 2009-03-25 16:53:14 UTC
  • mto: (4204.1.1 ianc-integration)
  • mto: This revision was merged to the branch mainline in revision 4205.
  • Revision ID: pub08@davor.org-20090325165314-1n3wv0ig2knf44xx
Another broken link.

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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
 
280
171
 
281
172
        if not diff_opts:
282
173
            diff_opts = []
283
 
        if sys.platform == 'win32':
284
 
            # Popen doesn't do the proper encoding for external commands
285
 
            # 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')
288
174
        diffcmd = ['diff',
289
 
                   '--label', old_label,
 
175
                   '--label', old_filename,
290
176
                   old_abspath,
291
 
                   '--label', new_label,
 
177
                   '--label', new_filename,
292
178
                   new_abspath,
293
179
                   '--binary',
294
 
                   ]
 
180
                  ]
295
181
 
296
 
        diff_opts = default_style_unified(diff_opts)
 
182
        # diff only allows one style to be specified; they don't override.
 
183
        # note that some of these take optargs, and the optargs can be
 
184
        # directly appended to the options.
 
185
        # this is only an approximate parser; it doesn't properly understand
 
186
        # the grammar.
 
187
        for s in ['-c', '-u', '-C', '-U',
 
188
                  '-e', '--ed',
 
189
                  '-q', '--brief',
 
190
                  '--normal',
 
191
                  '-n', '--rcs',
 
192
                  '-y', '--side-by-side',
 
193
                  '-D', '--ifdef']:
 
194
            for j in diff_opts:
 
195
                if j.startswith(s):
 
196
                    break
 
197
            else:
 
198
                continue
 
199
            break
 
200
        else:
 
201
            diffcmd.append('-u')
297
202
 
298
203
        if diff_opts:
299
204
            diffcmd.extend(diff_opts)
300
205
 
301
206
        pipe = _spawn_external_diff(diffcmd, capture_errors=True)
302
 
        out, err = pipe.communicate()
 
207
        out,err = pipe.communicate()
303
208
        rc = pipe.returncode
304
209
 
305
210
        # internal_diff() adds a trailing newline, add one here for consistency
306
 
        out += b'\n'
 
211
        out += '\n'
307
212
        if rc == 2:
308
213
            # 'diff' gives retcode == 2 for all sorts of errors
309
214
            # one of those is 'Binary files differ'.
316
221
            out, err = pipe.communicate()
317
222
 
318
223
            # Write out the new i18n diff response
319
 
            to_file.write(out + b'\n')
 
224
            to_file.write(out+'\n')
320
225
            if pipe.returncode != 2:
321
226
                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,))
 
227
                               'external diff failed with exit code 2'
 
228
                               ' when run with LANG=C and LC_ALL=C,'
 
229
                               ' but not when run natively: %r' % (diffcmd,))
325
230
 
326
 
            first_line = lang_c_out.split(b'\n', 1)[0]
 
231
            first_line = lang_c_out.split('\n', 1)[0]
327
232
            # Starting with diffutils 2.8.4 the word "binary" was dropped.
328
 
            m = re.match(b'^(binary )?files.*differ$', first_line, re.I)
 
233
            m = re.match('^(binary )?files.*differ$', first_line, re.I)
329
234
            if m is None:
330
235
                raise errors.BzrError('external diff failed with exit code 2;'
331
236
                                      ' command: %r' % (diffcmd,))
344
249
                msg = 'exit code %d' % rc
345
250
 
346
251
            raise errors.BzrError('external diff failed with %s; command: %r'
347
 
                                  % (msg, diffcmd))
 
252
                                  % (rc, diffcmd))
 
253
 
348
254
 
349
255
    finally:
350
256
        oldtmpf.close()                 # and delete
351
257
        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):
 
258
        # Clean up. Warn in case the files couldn't be deleted
 
259
        # (in case windows still holds the file open, but not
 
260
        # if the files have already been deleted)
 
261
        try:
 
262
            os.remove(old_abspath)
 
263
        except OSError, e:
 
264
            if e.errno not in (errno.ENOENT,):
 
265
                warning('Failed to delete temporary file: %s %s',
 
266
                        old_abspath, e)
 
267
        try:
 
268
            os.remove(new_abspath)
 
269
        except OSError:
 
270
            if e.errno not in (errno.ENOENT,):
 
271
                warning('Failed to delete temporary file: %s %s',
 
272
                        new_abspath, e)
 
273
 
 
274
 
 
275
def _get_trees_to_diff(path_list, revision_specs, old_url, new_url,
 
276
    apply_view=True):
369
277
    """Get the trees and specific files to diff given a list of paths.
370
278
 
371
279
    This method works out the trees to be diff'ed and the files of
382
290
    :param new_url:
383
291
        The url of the new branch or tree. If None, the tree to use is
384
292
        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
293
    :param apply_view:
389
294
        if True and a view is set, apply the view or check that the paths
390
295
        are within it
391
296
    :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.
 
297
        a tuple of (old_tree, new_tree, specific_files, extra_trees) where
 
298
        extra_trees is a sequence of additional trees to search in for
 
299
        file-ids.
397
300
    """
398
301
    # Get the old and new revision specs
399
302
    old_revision_spec = None
422
325
        default_location = path_list[0]
423
326
        other_paths = path_list[1:]
424
327
 
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
328
    # Get the old location
432
329
    specific_files = []
433
330
    if old_url is None:
434
331
        old_url = default_location
435
332
    working_tree, branch, relpath = \
436
 
        controldir.ControlDir.open_containing_tree_or_branch(old_url)
437
 
    lock_tree_or_branch(working_tree, branch)
 
333
        bzrdir.BzrDir.open_containing_tree_or_branch(old_url)
438
334
    if consider_relpath and relpath != '':
439
335
        if working_tree is not None and apply_view:
440
336
            views.check_path_in_view(working_tree, relpath)
441
337
        specific_files.append(relpath)
442
338
    old_tree = _get_tree_to_diff(old_revision_spec, working_tree, branch)
443
 
    old_branch = branch
444
339
 
445
340
    # Get the new location
446
341
    if new_url is None:
447
342
        new_url = default_location
448
343
    if new_url != old_url:
449
344
        working_tree, branch, relpath = \
450
 
            controldir.ControlDir.open_containing_tree_or_branch(new_url)
451
 
        lock_tree_or_branch(working_tree, branch)
 
345
            bzrdir.BzrDir.open_containing_tree_or_branch(new_url)
452
346
        if consider_relpath and relpath != '':
453
347
            if working_tree is not None and apply_view:
454
348
                views.check_path_in_view(working_tree, relpath)
455
349
            specific_files.append(relpath)
456
350
    new_tree = _get_tree_to_diff(new_revision_spec, working_tree, branch,
457
 
                                 basis_is_default=working_tree is None)
458
 
    new_branch = branch
 
351
        basis_is_default=working_tree is None)
459
352
 
460
353
    # Get the specific files (all files is None, no files is [])
461
354
    if make_paths_wt_relative and working_tree is not None:
462
 
        other_paths = working_tree.safe_relpath_files(
463
 
            other_paths,
 
355
        try:
 
356
            from bzrlib.builtins import safe_relpath_files
 
357
            other_paths = safe_relpath_files(working_tree, other_paths,
464
358
            apply_view=apply_view)
 
359
        except errors.FileInWrongBranch:
 
360
            raise errors.BzrCommandError("Files are in different branches")
465
361
    specific_files.extend(other_paths)
466
362
    if len(specific_files) == 0:
467
363
        specific_files = None
468
 
        if (working_tree is not None and working_tree.supports_views() and
469
 
                apply_view):
 
364
        if (working_tree is not None and working_tree.supports_views()
 
365
            and apply_view):
470
366
            view_files = working_tree.views.lookup_view()
471
367
            if view_files:
472
368
                specific_files = view_files
473
369
                view_str = views.view_display_str(view_files)
474
 
                note(gettext("*** Ignoring files outside view. View is %s") % view_str)
 
370
                note("*** ignoring files outside view: %s" % view_str)
475
371
 
476
372
    # Get extra trees that ought to be searched for file-ids
477
373
    extra_trees = None
478
374
    if working_tree is not None and working_tree not in (old_tree, new_tree):
479
375
        extra_trees = (working_tree,)
480
 
    return (old_tree, new_tree, old_branch, new_branch,
481
 
            specific_files, extra_trees)
482
 
 
 
376
    return old_tree, new_tree, specific_files, extra_trees
483
377
 
484
378
def _get_tree_to_diff(spec, tree=None, branch=None, basis_is_default=True):
485
379
    if branch is None and tree is not None:
500
394
                    old_label='a/', new_label='b/',
501
395
                    extra_trees=None,
502
396
                    path_encoding='utf8',
503
 
                    using=None,
504
 
                    format_cls=None,
505
 
                    context=DEFAULT_CONTEXT_AMOUNT):
 
397
                    using=None):
506
398
    """Show in text form the changes from one tree to another.
507
399
 
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)
 
400
    to_file
 
401
        The output stream.
 
402
 
 
403
    specific_files
 
404
        Include only changes to these files - None for all changes.
 
405
 
 
406
    external_diff_options
 
407
        If set, use an external GNU diff and pass these options.
 
408
 
 
409
    extra_trees
 
410
        If set, more Trees to use for looking up file ids
 
411
 
 
412
    path_encoding
 
413
        If set, the path will be encoded as specified, otherwise is supposed
 
414
        to be utf8
517
415
    """
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())
 
416
    old_tree.lock_read()
 
417
    try:
524
418
        if extra_trees is not None:
525
419
            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):
 
420
                tree.lock_read()
 
421
        new_tree.lock_read()
 
422
        try:
 
423
            differ = DiffTree.from_trees_options(old_tree, new_tree, to_file,
 
424
                                                 path_encoding,
 
425
                                                 external_diff_options,
 
426
                                                 old_label, new_label, using)
 
427
            return differ.show_diff(specific_files, extra_trees)
 
428
        finally:
 
429
            new_tree.unlock()
 
430
            if extra_trees is not None:
 
431
                for tree in extra_trees:
 
432
                    tree.unlock()
 
433
    finally:
 
434
        old_tree.unlock()
 
435
 
 
436
 
 
437
def _patch_header_date(tree, file_id, path):
537
438
    """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
 
439
    mtime = tree.get_file_mtime(file_id, path)
542
440
    return timestamp.format_patch_date(mtime)
543
441
 
544
442
 
545
443
def get_executable_change(old_is_x, new_is_x):
546
 
    descr = {True: b"+x", False: b"-x", None: b"??"}
 
444
    descr = { True:"+x", False:"-x", None:"??" }
547
445
    if old_is_x != new_is_x:
548
 
        return [b"%s to %s" % (descr[old_is_x], descr[new_is_x],)]
 
446
        return ["%s to %s" % (descr[old_is_x], descr[new_is_x],)]
549
447
    else:
550
448
        return []
551
449
 
582
480
                     diff_tree.to_file, diff_tree.path_encoding)
583
481
 
584
482
    @staticmethod
585
 
    def _diff_many(differs, old_path, new_path, old_kind, new_kind):
 
483
    def _diff_many(differs, file_id, old_path, new_path, old_kind, new_kind):
586
484
        for file_differ in differs:
587
 
            result = file_differ.diff(old_path, new_path, old_kind, new_kind)
 
485
            result = file_differ.diff(file_id, old_path, new_path, old_kind,
 
486
                                      new_kind)
588
487
            if result is not DiffPath.CANNOT_DIFF:
589
488
                return result
590
489
        else:
597
496
    Represents kind change as deletion + creation.  Uses the other differs
598
497
    to do this.
599
498
    """
600
 
 
601
499
    def __init__(self, differs):
602
500
        self.differs = differs
603
501
 
608
506
    def from_diff_tree(klass, diff_tree):
609
507
        return klass(diff_tree.differs)
610
508
 
611
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
509
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
612
510
        """Perform comparison
613
511
 
 
512
        :param file_id: The file_id of the file to compare
614
513
        :param old_path: Path of the file in the old tree
615
514
        :param new_path: Path of the file in the new tree
616
515
        :param old_kind: Old file-kind of the file
618
517
        """
619
518
        if None in (old_kind, new_kind):
620
519
            return DiffPath.CANNOT_DIFF
621
 
        result = DiffPath._diff_many(
622
 
            self.differs, old_path, new_path, old_kind, None)
 
520
        result = DiffPath._diff_many(self.differs, file_id, old_path,
 
521
                                       new_path, old_kind, None)
623
522
        if result is DiffPath.CANNOT_DIFF:
624
523
            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
 
524
        return DiffPath._diff_many(self.differs, file_id, old_path, new_path,
 
525
                                     None, new_kind)
642
526
 
643
527
 
644
528
class DiffDirectory(DiffPath):
645
529
 
646
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
530
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
647
531
        """Perform comparison between two directories.  (dummy)
648
532
 
649
533
        """
658
542
 
659
543
class DiffSymlink(DiffPath):
660
544
 
661
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
545
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
662
546
        """Perform comparison between two symlinks
663
547
 
 
548
        :param file_id: The file_id of the file to compare
664
549
        :param old_path: Path of the file in the old tree
665
550
        :param new_path: Path of the file in the new tree
666
551
        :param old_kind: Old file-kind of the file
669
554
        if 'symlink' not in (old_kind, new_kind):
670
555
            return self.CANNOT_DIFF
671
556
        if old_kind == 'symlink':
672
 
            old_target = self.old_tree.get_symlink_target(old_path)
 
557
            old_target = self.old_tree.get_symlink_target(file_id)
673
558
        elif old_kind is None:
674
559
            old_target = None
675
560
        else:
676
561
            return self.CANNOT_DIFF
677
562
        if new_kind == 'symlink':
678
 
            new_target = self.new_tree.get_symlink_target(new_path)
 
563
            new_target = self.new_tree.get_symlink_target(file_id)
679
564
        elif new_kind is None:
680
565
            new_target = None
681
566
        else:
684
569
 
685
570
    def diff_symlink(self, old_target, new_target):
686
571
        if old_target is None:
687
 
            self.to_file.write(b'=== target is \'%s\'\n' %
688
 
                               new_target.encode(self.path_encoding, 'replace'))
 
572
            self.to_file.write('=== target is %r\n' % new_target)
689
573
        elif new_target is None:
690
 
            self.to_file.write(b'=== target was \'%s\'\n' %
691
 
                               old_target.encode(self.path_encoding, 'replace'))
 
574
            self.to_file.write('=== target was %r\n' % old_target)
692
575
        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')))
 
576
            self.to_file.write('=== target changed %r => %r\n' %
 
577
                              (old_target, new_target))
696
578
        return self.CHANGED
697
579
 
698
580
 
703
585
    EPOCH_DATE = '1970-01-01 00:00:00 +0000'
704
586
 
705
587
    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):
 
588
                 old_label='', new_label='', text_differ=internal_diff):
708
589
        DiffPath.__init__(self, old_tree, new_tree, to_file, path_encoding)
709
590
        self.text_differ = text_differ
710
591
        self.old_label = old_label
711
592
        self.new_label = new_label
712
593
        self.path_encoding = path_encoding
713
 
        self.context_lines = context_lines
714
594
 
715
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
595
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
716
596
        """Compare two files in unified diff format
717
597
 
 
598
        :param file_id: The file_id of the file to compare
718
599
        :param old_path: Path of the file in the old tree
719
600
        :param new_path: Path of the file in the new tree
720
601
        :param old_kind: Old file-kind of the file
722
603
        """
723
604
        if 'file' not in (old_kind, new_kind):
724
605
            return self.CANNOT_DIFF
 
606
        from_file_id = to_file_id = file_id
725
607
        if old_kind == 'file':
726
 
            old_date = _patch_header_date(self.old_tree, old_path)
 
608
            old_date = _patch_header_date(self.old_tree, file_id, old_path)
727
609
        elif old_kind is None:
728
610
            old_date = self.EPOCH_DATE
 
611
            from_file_id = None
729
612
        else:
730
613
            return self.CANNOT_DIFF
731
614
        if new_kind == 'file':
732
 
            new_date = _patch_header_date(self.new_tree, new_path)
 
615
            new_date = _patch_header_date(self.new_tree, file_id, new_path)
733
616
        elif new_kind is None:
734
617
            new_date = self.EPOCH_DATE
 
618
            to_file_id = None
735
619
        else:
736
620
            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)
 
621
        from_label = '%s%s\t%s' % (self.old_label, old_path, old_date)
 
622
        to_label = '%s%s\t%s' % (self.new_label, new_path, new_date)
 
623
        return self.diff_text(from_file_id, to_file_id, from_label, to_label)
742
624
 
743
 
    def diff_text(self, from_path, to_path, from_label, to_label):
 
625
    def diff_text(self, from_file_id, to_file_id, from_label, to_label):
744
626
        """Diff the content of given files in two trees
745
627
 
746
 
        :param from_path: The path in the from tree. If None,
 
628
        :param from_file_id: The id of the file in the from tree.  If None,
747
629
            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,
 
630
        :param to_file_id: The id of the file in the to tree.  This may refer
 
631
            to a different file from from_file_id.  If None,
750
632
            the file is not present in the to tree.
751
633
        """
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:
 
634
        def _get_text(tree, file_id):
 
635
            if file_id is not None:
 
636
                return tree.get_file(file_id).readlines()
 
637
            else:
758
638
                return []
759
639
        try:
760
 
            from_text = _get_text(self.old_tree, from_path)
761
 
            to_text = _get_text(self.new_tree, to_path)
 
640
            from_text = _get_text(self.old_tree, from_file_id)
 
641
            to_text = _get_text(self.new_tree, to_file_id)
762
642
            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)
 
643
                             self.to_file)
765
644
        except errors.BinaryFile:
766
645
            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'))
 
646
                  ("Binary files %s and %s differ\n" %
 
647
                  (from_label, to_label)).encode(self.path_encoding))
769
648
        return self.CHANGED
770
649
 
771
650
 
775
654
                 path_encoding='utf-8'):
776
655
        DiffPath.__init__(self, old_tree, new_tree, to_file, path_encoding)
777
656
        self.command_template = command_template
778
 
        self._root = osutils.mkdtemp(prefix='brz-diff-')
 
657
        self._root = osutils.mkdtemp(prefix='bzr-diff-')
779
658
 
780
659
    @classmethod
781
 
    def from_string(klass, command_template, old_tree, new_tree, to_file,
 
660
    def from_string(klass, command_string, old_tree, new_tree, to_file,
782
661
                    path_encoding='utf-8'):
 
662
        command_template = commands.shlex_split_unicode(command_string)
 
663
        command_template.extend(['%(old_path)s', '%(new_path)s'])
783
664
        return klass(command_template, old_tree, new_tree, to_file,
784
665
                     path_encoding)
785
666
 
786
667
    @classmethod
787
 
    def make_from_diff_tree(klass, command_string, external_diff_options=None):
 
668
    def make_from_diff_tree(klass, command_string):
788
669
        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,
 
670
            return klass.from_string(command_string, diff_tree.old_tree,
793
671
                                     diff_tree.new_tree, diff_tree.to_file)
794
672
        return from_diff_tree
795
673
 
796
674
    def _get_command(self, old_path, new_path):
797
675
        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
 
676
        return [t % my_map for t in self.command_template]
812
677
 
813
678
    def _execute(self, old_path, new_path):
814
679
        command = self._get_command(old_path, new_path)
815
680
        try:
816
681
            proc = subprocess.Popen(command, stdout=subprocess.PIPE,
817
682
                                    cwd=self._root)
818
 
        except OSError as e:
 
683
        except OSError, e:
819
684
            if e.errno == errno.ENOENT:
820
685
                raise errors.ExecutableMissing(command[0])
821
686
            else:
822
687
                raise
823
688
        self.to_file.write(proc.stdout.read())
824
 
        proc.stdout.close()
825
689
        return proc.wait()
826
690
 
827
691
    def _try_symlink_root(self, tree, prefix):
828
 
        if (getattr(tree, 'abspath', None) is None or
829
 
                not osutils.host_os_dereferences_symlinks()):
 
692
        if (getattr(tree, 'abspath', None) is None
 
693
            or not osutils.host_os_dereferences_symlinks()):
830
694
            return False
831
695
        try:
832
696
            os.symlink(tree.abspath(''), osutils.pathjoin(self._root, prefix))
833
 
        except OSError as e:
 
697
        except OSError, e:
834
698
            if e.errno != errno.EEXIST:
835
699
                raise
836
700
        return True
837
701
 
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):
 
702
    def _write_file(self, file_id, tree, prefix, relpath):
 
703
        full_path = osutils.pathjoin(self._root, prefix, relpath)
 
704
        if self._try_symlink_root(tree, prefix):
875
705
            return full_path
876
706
        parent_dir = osutils.dirname(full_path)
877
707
        try:
878
708
            os.makedirs(parent_dir)
879
 
        except OSError as e:
 
709
        except OSError, e:
880
710
            if e.errno != errno.EEXIST:
881
711
                raise
882
 
        with tree.get_file(relpath) as source, \
883
 
                open(full_path, 'wb') as target:
884
 
            osutils.pumpfile(source, target)
 
712
        source = tree.get_file(file_id, relpath)
885
713
        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)
 
714
            target = open(full_path, 'wb')
 
715
            try:
 
716
                osutils.pumpfile(source, target)
 
717
            finally:
 
718
                target.close()
 
719
        finally:
 
720
            source.close()
 
721
        osutils.make_readonly(full_path)
 
722
        mtime = tree.get_file_mtime(file_id)
 
723
        os.utime(full_path, (mtime, mtime))
893
724
        return full_path
894
725
 
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)
 
726
    def _prepare_files(self, file_id, old_path, new_path):
 
727
        old_disk_path = self._write_file(file_id, self.old_tree, 'old',
 
728
                                         old_path)
 
729
        new_disk_path = self._write_file(file_id, self.new_tree, 'new',
 
730
                                         new_path)
902
731
        return old_disk_path, new_disk_path
903
732
 
904
733
    def finish(self):
905
 
        try:
906
 
            osutils.rmtree(self._root)
907
 
        except OSError as e:
908
 
            if e.errno != errno.ENOENT:
909
 
                mutter("The temporary directory \"%s\" was not "
910
 
                       "cleanly removed: %s." % (self._root, e))
 
734
        osutils.rmtree(self._root)
911
735
 
912
 
    def diff(self, old_path, new_path, old_kind, new_kind):
 
736
    def diff(self, file_id, old_path, new_path, old_kind, new_kind):
913
737
        if (old_kind, new_kind) != ('file', 'file'):
914
738
            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()
 
739
        self._prepare_files(file_id, old_path, new_path)
 
740
        self._execute(osutils.pathjoin('old', old_path),
 
741
                      osutils.pathjoin('new', new_path))
933
742
 
934
743
 
935
744
class DiffTree(object):
947
756
    # list of factories that can provide instances of DiffPath objects
948
757
    # may be extended by plugins.
949
758
    diff_factories = [DiffSymlink.from_diff_tree,
950
 
                      DiffDirectory.from_diff_tree,
951
 
                      DiffTreeReference.from_diff_tree]
 
759
                      DiffDirectory.from_diff_tree]
952
760
 
953
761
    def __init__(self, old_tree, new_tree, to_file, path_encoding='utf-8',
954
762
                 diff_text=None, extra_factories=None):
964
772
            DiffPaths"""
965
773
        if diff_text is None:
966
774
            diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
967
 
                                 '', '', internal_diff)
 
775
                                 '', '',  internal_diff)
968
776
        self.old_tree = old_tree
969
777
        self.new_tree = new_tree
970
778
        self.to_file = to_file
978
786
    @classmethod
979
787
    def from_trees_options(klass, old_tree, new_tree, to_file,
980
788
                           path_encoding, external_diff_options, old_label,
981
 
                           new_label, using, context_lines):
 
789
                           new_label, using):
982
790
        """Factory for producing a DiffTree.
983
791
 
984
792
        Designed to accept options used by show_diff_trees.
985
 
 
986
793
        :param old_tree: The tree to show as old in the comparison
987
794
        :param new_tree: The tree to show as new in the comparison
988
795
        :param to_file: File to write comparisons to
994
801
        :param using: Commandline to use to invoke an external diff tool
995
802
        """
996
803
        if using is not None:
997
 
            extra_factories = [DiffFromTool.make_from_diff_tree(
998
 
                using, external_diff_options)]
 
804
            extra_factories = [DiffFromTool.make_from_diff_tree(using)]
999
805
        else:
1000
806
            extra_factories = []
1001
807
        if external_diff_options:
1002
808
            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
 
                """
 
809
            def diff_file(olab, olines, nlab, nlines, to_file):
1008
810
                external_diff(olab, olines, nlab, nlines, to_file, opts)
1009
811
        else:
1010
812
            diff_file = internal_diff
1011
813
        diff_text = DiffText(old_tree, new_tree, to_file, path_encoding,
1012
 
                             old_label, new_label, diff_file, context_lines=context_lines)
 
814
                             old_label, new_label, diff_file)
1013
815
        return klass(old_tree, new_tree, to_file, path_encoding, diff_text,
1014
816
                     extra_factories)
1015
817
 
1016
818
    def show_diff(self, specific_files, extra_trees=None):
1017
819
        """Write tree diff to self.to_file
1018
820
 
1019
 
        :param specific_files: the specific files to compare (recursive)
 
821
        :param sepecific_files: the specific files to compare (recursive)
1020
822
        :param extra_trees: extra trees to use for mapping paths to file_ids
1021
823
        """
1022
824
        try:
1029
831
        # TODO: Generation of pseudo-diffs for added/deleted files could
1030
832
        # be usefully made into a much faster special case.
1031
833
        iterator = self.new_tree.iter_changes(self.old_tree,
1032
 
                                              specific_files=specific_files,
1033
 
                                              extra_trees=extra_trees,
1034
 
                                              require_versioned=True)
 
834
                                               specific_files=specific_files,
 
835
                                               extra_trees=extra_trees,
 
836
                                               require_versioned=True)
1035
837
        has_changes = 0
1036
 
 
1037
838
        def changes_key(change):
1038
 
            old_path, new_path = change.path
 
839
            old_path, new_path = change[1]
1039
840
            path = new_path
1040
841
            if path is None:
1041
842
                path = old_path
1042
843
            return path
1043
 
 
1044
844
        def get_encoded_path(path):
1045
845
            if path is not None:
1046
846
                return path.encode(self.path_encoding, "replace")
1047
 
        for change in sorted(iterator, key=changes_key):
 
847
        for (file_id, paths, changed_content, versioned, parent, name, kind,
 
848
             executable) in sorted(iterator, key=changes_key):
1048
849
            # The root does not get diffed, and items with no known kind (that
1049
850
            # 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])
 
851
            if parent == (None, None) or kind == (None, None):
 
852
                continue
 
853
            oldpath, newpath = paths
 
854
            oldpath_encoded = get_encoded_path(paths[0])
 
855
            newpath_encoded = get_encoded_path(paths[1])
 
856
            old_present = (kind[0] is not None and versioned[0])
 
857
            new_present = (kind[1] is not None and versioned[1])
 
858
            renamed = (parent[0], name[0]) != (parent[1], name[1])
1065
859
 
1066
860
            properties_changed = []
1067
 
            properties_changed.extend(
1068
 
                get_executable_change(executable[0], executable[1]))
 
861
            properties_changed.extend(get_executable_change(executable[0], executable[1]))
1069
862
 
1070
863
            if properties_changed:
1071
 
                prop_str = b" (properties changed: %s)" % (
1072
 
                    b", ".join(properties_changed),)
 
864
                prop_str = " (properties changed: %s)" % (", ".join(properties_changed),)
1073
865
            else:
1074
 
                prop_str = b""
 
866
                prop_str = ""
1075
867
 
1076
868
            if (old_present, new_present) == (True, False):
1077
 
                self.to_file.write(b"=== removed %s '%s'\n" %
1078
 
                                   (kind[0].encode('ascii'), oldpath_encoded))
 
869
                self.to_file.write("=== removed %s '%s'\n" %
 
870
                                   (kind[0], oldpath_encoded))
1079
871
                newpath = oldpath
1080
872
            elif (old_present, new_present) == (False, True):
1081
 
                self.to_file.write(b"=== added %s '%s'\n" %
1082
 
                                   (kind[1].encode('ascii'), newpath_encoded))
 
873
                self.to_file.write("=== added %s '%s'\n" %
 
874
                                   (kind[1], newpath_encoded))
1083
875
                oldpath = newpath
1084
876
            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))
 
877
                self.to_file.write("=== renamed %s '%s' => '%s'%s\n" %
 
878
                    (kind[0], oldpath_encoded, newpath_encoded, prop_str))
1087
879
            else:
1088
880
                # if it was produced by iter_changes, it must be
1089
881
                # 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])
 
882
                self.to_file.write("=== modified %s '%s'%s\n" % (kind[0],
 
883
                                   newpath_encoded, prop_str))
 
884
            if changed_content:
 
885
                self.diff(file_id, oldpath, newpath)
1094
886
                has_changes = 1
1095
887
            if renamed:
1096
888
                has_changes = 1
1097
889
        return has_changes
1098
890
 
1099
 
    def diff(self, old_path, new_path):
 
891
    def diff(self, file_id, old_path, new_path):
1100
892
        """Perform a diff of a single file
1101
893
 
 
894
        :param file_id: file-id of the file
1102
895
        :param old_path: The path of the file in the old tree
1103
896
        :param new_path: The path of the file in the new tree
1104
897
        """
1105
 
        if old_path is None:
 
898
        try:
 
899
            old_kind = self.old_tree.kind(file_id)
 
900
        except (errors.NoSuchId, errors.NoSuchFile):
1106
901
            old_kind = None
1107
 
        else:
1108
 
            old_kind = self.old_tree.kind(old_path)
1109
 
        if new_path is None:
 
902
        try:
 
903
            new_kind = self.new_tree.kind(file_id)
 
904
        except (errors.NoSuchId, errors.NoSuchFile):
1110
905
            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
906
 
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)
 
907
        result = DiffPath._diff_many(self.differs, file_id, old_path,
 
908
                                       new_path, old_kind, new_kind)
1118
909
        if result is DiffPath.CANNOT_DIFF:
1119
910
            error_path = new_path
1120
911
            if error_path is None:
1121
912
                error_path = old_path
1122
913
            raise errors.NoDiffFound(error_path)
1123
 
 
1124
 
 
1125
 
format_registry = Registry()
1126
 
format_registry.register('default', DiffTree)