forked from gitpython-developers/GitPython
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathdiff.py
More file actions
575 lines (450 loc) · 18.9 KB
/
Copy pathdiff.py
File metadata and controls
575 lines (450 loc) · 18.9 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
# Copyright (C) 2008, 2009 Michael Trier ([email protected]) and contributors
#
# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
__all__ = ["DiffConstants", "NULL_TREE", "INDEX", "Diffable", "DiffIndex", "Diff"]
import enum
import re
import warnings
from git.cmd import handle_process_output
from git.compat import defenc
from git.objects.blob import Blob
from git.objects.util import mode_str_to_int
from git.util import finalize_process, hex_to_bin
# typing ------------------------------------------------------------------
from typing import (
Any,
Iterator,
List,
Match,
Optional,
Sequence,
Tuple,
TYPE_CHECKING,
TypeVar,
Union,
cast,
)
from git.types import PathLike, Literal
if TYPE_CHECKING:
from subprocess import Popen
from git.cmd import Git
from git.objects.base import IndexObject
from git.objects.commit import Commit
from git.objects.tree import Tree
from git.repo.base import Repo
Lit_change_type = Literal["A", "D", "C", "M", "R", "T", "U"]
# ------------------------------------------------------------------------
@enum.unique
class DiffConstants(enum.Enum):
"""Special objects for :meth:`Diffable.diff`.
See the :meth:`Diffable.diff` method's ``other`` parameter, which accepts various
values including these.
:note:
These constants are also available as attributes of the :mod:`git.diff` module,
the :class:`Diffable` class and its subclasses and instances, and the top-level
:mod:`git` module.
"""
NULL_TREE = enum.auto()
"""Stand-in indicating you want to compare against the empty tree in diffs.
Also accessible as :const:`git.NULL_TREE`, :const:`git.diff.NULL_TREE`, and
:const:`Diffable.NULL_TREE`.
"""
INDEX = enum.auto()
"""Stand-in indicating you want to diff against the index.
Also accessible as :const:`git.INDEX`, :const:`git.diff.INDEX`, and
:const:`Diffable.INDEX`, as well as :const:`Diffable.Index`. The latter has been
kept for backward compatibility and made an alias of this, so it may still be used.
"""
NULL_TREE: Literal[DiffConstants.NULL_TREE] = DiffConstants.NULL_TREE
"""Stand-in indicating you want to compare against the empty tree in diffs.
See :meth:`Diffable.diff`, which accepts this as a value of its ``other`` parameter.
This is an alias of :const:`DiffConstants.NULL_TREE`, which may also be accessed as
:const:`git.NULL_TREE` and :const:`Diffable.NULL_TREE`.
"""
INDEX: Literal[DiffConstants.INDEX] = DiffConstants.INDEX
"""Stand-in indicating you want to diff against the index.
See :meth:`Diffable.diff`, which accepts this as a value of its ``other`` parameter.
This is an alias of :const:`DiffConstants.INDEX`, which may also be accessed as
:const:`git.INDEX` and :const:`Diffable.INDEX`, as well as :const:`Diffable.Index`.
"""
_octal_byte_re = re.compile(rb"\\([0-9]{3})")
def _octal_repl(matchobj: Match) -> bytes:
pass
def decode_path(path: bytes, has_ab_prefix: bool = True) -> Optional[bytes]:
pass
class Diffable:
"""Common interface for all objects that can be diffed against another object of
compatible type.
:note:
Subclasses require a :attr:`repo` member, as it is the case for
:class:`~git.objects.base.Object` instances. For practical reasons we do not
derive from :class:`~git.objects.base.Object`.
"""
__slots__ = ()
repo: "Repo"
"""Repository to operate on. Must be provided by subclass or sibling class."""
NULL_TREE = NULL_TREE
"""Stand-in indicating you want to compare against the empty tree in diffs.
See the :meth:`diff` method, which accepts this as a value of its ``other``
parameter.
This is the same as :const:`DiffConstants.NULL_TREE`, and may also be accessed as
:const:`git.NULL_TREE` and :const:`git.diff.NULL_TREE`.
"""
INDEX = INDEX
"""Stand-in indicating you want to diff against the index.
See the :meth:`diff` method, which accepts this as a value of its ``other``
parameter.
This is the same as :const:`DiffConstants.INDEX`, and may also be accessed as
:const:`git.INDEX` and :const:`git.diff.INDEX`, as well as :class:`Diffable.INDEX`,
which is kept for backward compatibility (it is now defined an alias of this).
"""
Index = INDEX
"""Stand-in indicating you want to diff against the index
(same as :const:`~Diffable.INDEX`).
This is an alias of :const:`~Diffable.INDEX`, for backward compatibility. See
:const:`~Diffable.INDEX` and :meth:`diff` for details.
:note:
Although always meant for use as an opaque constant, this was formerly defined
as a class. Its usage is unchanged, but static type annotations that attempt
to permit only this object must be changed to avoid new mypy errors. This was
previously not possible to do, though ``Type[Diffable.Index]`` approximated it.
It is now possible to do precisely, using ``Literal[DiffConstants.INDEX]``.
"""
def _process_diff_args(
self,
args: List[Union[PathLike, "Diffable"]],
) -> List[Union[PathLike, "Diffable"]]:
"""
:return:
Possibly altered version of the given args list.
This method is called right before git command execution.
Subclasses can use it to alter the behaviour of the superclass.
"""
return args
def diff(
self,
other: Union[DiffConstants, "Tree", "Commit", str, None] = INDEX,
paths: Union[PathLike, List[PathLike], Tuple[PathLike, ...], None] = None,
create_patch: bool = False,
**kwargs: Any,
) -> "DiffIndex[Diff]":
"""Create diffs between two items being trees, trees and index or an index and
the working tree. Detects renames automatically.
:param other:
This the item to compare us with.
* If ``None``, we will be compared to the working tree.
* If a :class:`~git.types.Tree_ish` or string, it will be compared against
the respective tree.
* If :const:`INDEX`, it will be compared against the index.
* If :const:`NULL_TREE`, it will compare against the empty tree.
This parameter defaults to :const:`INDEX` (rather than ``None``) so that the
method will not by default fail on bare repositories.
:param paths:
This a list of paths or a single path to limit the diff to. It will only
include at least one of the given path or paths.
:param create_patch:
If ``True``, the returned :class:`Diff` contains a detailed patch that if
applied makes the self to other. Patches are somewhat costly as blobs have
to be read and diffed.
:param kwargs:
Additional arguments passed to :manpage:`git-diff(1)`, such as ``R=True`` to
swap both sides of the diff.
:return:
A :class:`DiffIndex` representing the computed diff.
:note:
On a bare repository, `other` needs to be provided as :const:`INDEX`, or as
an instance of :class:`~git.objects.tree.Tree` or
:class:`~git.objects.commit.Commit`, or a git command error will occur.
"""
args: List[Union[PathLike, Diffable]] = []
args.append("--abbrev=40") # We need full shas.
args.append("--full-index") # Get full index paths, not only filenames.
# Remove default '-M' arg (check for renames) if user is overriding it.
if not any(x in kwargs for x in ("find_renames", "no_renames", "M")):
args.append("-M")
if create_patch:
args.append("-p")
args.append("--no-ext-diff")
else:
args.append("--raw")
args.append("-z")
# Ensure we never see colored output.
# Fixes: https://github.com/gitpython-developers/GitPython/issues/172
args.append("--no-color")
if paths is not None and not isinstance(paths, (tuple, list)):
paths = [paths]
diff_cmd = self.repo.git.diff
if other is INDEX:
args.insert(0, "--cached")
elif other is NULL_TREE:
args.insert(0, "-r") # Recursive diff-tree.
args.insert(0, "--root")
diff_cmd = self.repo.git.diff_tree
elif other is not None:
args.insert(0, "-r") # Recursive diff-tree.
args.insert(0, other)
diff_cmd = self.repo.git.diff_tree
args.insert(0, self)
# paths is a list or tuple here, or None.
if paths:
args.append("--")
args.extend(paths)
# END paths handling
kwargs["as_process"] = True
proc = diff_cmd(*self._process_diff_args(args), **kwargs)
diff_method = Diff._index_from_patch_format if create_patch else Diff._index_from_raw_format
index = diff_method(self.repo, proc)
proc.wait()
return index
T_Diff = TypeVar("T_Diff", bound="Diff")
class DiffIndex(List[T_Diff]):
R"""An index for diffs, allowing a list of :class:`Diff`\s to be queried by the diff
properties.
The class improves the diff handling convenience.
"""
change_type: Sequence[Literal["A", "C", "D", "R", "M", "T"]] = ("A", "C", "D", "R", "M", "T") # noqa: F821
"""Change type invariant identifying possible ways a blob can have changed:
* ``A`` = Added
* ``D`` = Deleted
* ``R`` = Renamed
* ``M`` = Modified
* ``T`` = Changed in the type
"""
def iter_change_type(self, change_type: Lit_change_type) -> Iterator[T_Diff]:
"""
:return:
Iterator yielding :class:`Diff` instances that match the given `change_type`
:param change_type:
Member of :attr:`DiffIndex.change_type`, namely:
* 'A' for added paths
* 'D' for deleted paths
* 'R' for renamed paths
* 'M' for paths with modified data
* 'T' for changed in the type paths
"""
pass
# END for each diff
class Diff:
"""A Diff contains diff information between two Trees.
It contains two sides a and b of the diff. Members are prefixed with "a" and "b"
respectively to indicate that.
Diffs keep information about the changed blob objects, the file mode, renames,
deletions and new files.
There are a few cases where ``None`` has to be expected as member variable value:
New File::
a_mode is None
a_blob is None
a_path is None
Deleted File::
b_mode is None
b_blob is None
b_path is None
Working Tree Blobs:
When comparing to working trees, the working tree blob will have a null hexsha
as a corresponding object does not yet exist. The mode will be null as well. The
path will be available, though.
If it is listed in a diff, the working tree version of the file must differ from
the version in the index or tree, and hence has been modified.
"""
# Precompiled regex.
re_header = re.compile(
rb"""
^diff[ ]--git
[ ](?P<a_path_fallback>"?[ab]/.+?"?)[ ](?P<b_path_fallback>"?[ab]/.+?"?)\n
(?:^old[ ]mode[ ](?P<old_mode>\d+)\n
^new[ ]mode[ ](?P<new_mode>\d+)(?:\n|$))?
(?:^similarity[ ]index[ ]\d+%\n
^rename[ ]from[ ](?P<rename_from>.*)\n
^rename[ ]to[ ](?P<rename_to>.*)(?:\n|$))?
(?:^new[ ]file[ ]mode[ ](?P<new_file_mode>.+)(?:\n|$))?
(?:^deleted[ ]file[ ]mode[ ](?P<deleted_file_mode>.+)(?:\n|$))?
(?:^similarity[ ]index[ ]\d+%\n
^copy[ ]from[ ].*\n
^copy[ ]to[ ](?P<copied_file_name>.*)(?:\n|$))?
(?:^index[ ](?P<a_blob_id>[0-9A-Fa-f]+)
\.\.(?P<b_blob_id>[0-9A-Fa-f]+)[ ]?(?P<b_mode>.+)?(?:\n|$))?
(?:^---[ ](?P<a_path>[^\t\n\r\f\v]*)[\t\r\f\v]*(?:\n|$))?
(?:^\+\+\+[ ](?P<b_path>[^\t\n\r\f\v]*)[\t\r\f\v]*(?:\n|$))?
""",
re.VERBOSE | re.MULTILINE,
)
# These can be used for comparisons.
NULL_HEX_SHA = "0" * 40
NULL_BIN_SHA = b"\0" * 20
__slots__ = (
"a_blob",
"b_blob",
"a_mode",
"b_mode",
"a_rawpath",
"b_rawpath",
"new_file",
"deleted_file",
"copied_file",
"raw_rename_from",
"raw_rename_to",
"diff",
"change_type",
"score",
)
def __init__(
self,
repo: "Repo",
a_rawpath: Optional[bytes],
b_rawpath: Optional[bytes],
a_blob_id: Union[str, bytes, None],
b_blob_id: Union[str, bytes, None],
a_mode: Union[bytes, str, None],
b_mode: Union[bytes, str, None],
new_file: bool,
deleted_file: bool,
copied_file: bool,
raw_rename_from: Optional[bytes],
raw_rename_to: Optional[bytes],
diff: Union[str, bytes, None],
change_type: Optional[Lit_change_type],
score: Optional[int],
) -> None:
assert a_rawpath is None or isinstance(a_rawpath, bytes)
assert b_rawpath is None or isinstance(b_rawpath, bytes)
self.a_rawpath = a_rawpath
self.b_rawpath = b_rawpath
self.a_mode = mode_str_to_int(a_mode) if a_mode else None
self.b_mode = mode_str_to_int(b_mode) if b_mode else None
# Determine whether this diff references a submodule. If it does then
# we need to overwrite "repo" to the corresponding submodule's repo instead.
if repo and a_rawpath:
for submodule in repo.submodules:
if submodule.path == a_rawpath.decode(defenc, "replace"):
if submodule.module_exists():
repo = submodule.module()
break
self.a_blob: Union["IndexObject", None]
if a_blob_id is None or a_blob_id == self.NULL_HEX_SHA:
self.a_blob = None
else:
self.a_blob = Blob(repo, hex_to_bin(a_blob_id), mode=self.a_mode, path=self.a_path)
self.b_blob: Union["IndexObject", None]
if b_blob_id is None or b_blob_id == self.NULL_HEX_SHA:
self.b_blob = None
else:
self.b_blob = Blob(repo, hex_to_bin(b_blob_id), mode=self.b_mode, path=self.b_path)
self.new_file: bool = new_file
self.deleted_file: bool = deleted_file
self.copied_file: bool = copied_file
# Be clear and use None instead of empty strings.
assert raw_rename_from is None or isinstance(raw_rename_from, bytes)
assert raw_rename_to is None or isinstance(raw_rename_to, bytes)
self.raw_rename_from = raw_rename_from or None
self.raw_rename_to = raw_rename_to or None
self.diff = diff
self.change_type: Union[Lit_change_type, None] = change_type
self.score = score
def __eq__(self, other: object) -> bool:
for name in self.__slots__:
if getattr(self, name) != getattr(other, name):
return False
# END for each name
return True
def __ne__(self, other: object) -> bool:
return not (self == other)
def __hash__(self) -> int:
return hash(tuple(getattr(self, n) for n in self.__slots__))
def __str__(self) -> str:
h = "%s"
if self.a_blob:
h %= self.a_blob.path
elif self.b_blob:
h %= self.b_blob.path
msg = ""
line = None
line_length = 0
for b, n in zip((self.a_blob, self.b_blob), ("lhs", "rhs")):
if b:
line = "\n%s: %o | %s" % (n, b.mode, b.hexsha)
else:
line = "\n%s: None" % n
# END if blob is not None
line_length = max(len(line), line_length)
msg += line
# END for each blob
# Add headline.
h += "\n" + "=" * line_length
if self.deleted_file:
msg += "\nfile deleted in rhs"
if self.new_file:
msg += "\nfile added in rhs"
if self.copied_file:
msg += "\nfile %r copied from %r" % (self.b_path, self.a_path)
if self.rename_from:
msg += "\nfile renamed from %r" % self.rename_from
if self.rename_to:
msg += "\nfile renamed to %r" % self.rename_to
if self.diff:
msg += "\n---"
try:
msg += self.diff.decode(defenc) if isinstance(self.diff, bytes) else self.diff
except UnicodeDecodeError:
msg += "OMITTED BINARY DATA"
# END handle encoding
msg += "\n---"
# END diff info
return h + msg
@property
def a_path(self) -> Optional[str]:
pass
@property
def b_path(self) -> Optional[str]:
pass
@property
def rename_from(self) -> Optional[str]:
pass
@property
def rename_to(self) -> Optional[str]:
pass
@property
def renamed(self) -> bool:
"""Deprecated, use :attr:`renamed_file` instead.
:return:
``True`` if the blob of our diff has been renamed
:note:
This property is deprecated.
Please use the :attr:`renamed_file` property instead.
"""
pass
@property
def renamed_file(self) -> bool:
""":return: ``True`` if the blob of our diff has been renamed"""
pass
@classmethod
def _pick_best_path(cls, path_match: bytes, rename_match: bytes, path_fallback_match: bytes) -> Optional[bytes]:
pass
@classmethod
def _index_from_patch_format(cls, repo: "Repo", proc: Union["Popen", "Git.AutoInterrupt"]) -> DiffIndex["Diff"]:
"""Create a new :class:`DiffIndex` from the given process output which must be
in patch format.
:param repo:
The repository we are operating on.
:param proc:
:manpage:`git-diff(1)` process to read from
(supports :class:`Git.AutoInterrupt <git.cmd.Git.AutoInterrupt>` wrapper).
:return:
:class:`DiffIndex`
"""
pass
@staticmethod
def _handle_diff_line(lines_bytes: bytes, repo: "Repo", index: DiffIndex["Diff"]) -> None:
pass
@classmethod
def _index_from_raw_format(cls, repo: "Repo", proc: "Popen") -> "DiffIndex[Diff]":
"""Create a new :class:`DiffIndex` from the given process output which must be
in raw format.
:param repo:
The repository we are operating on.
:param proc:
Process to read output from.
:return:
:class:`DiffIndex`
"""
pass