{{ message }}
-
-
Notifications
You must be signed in to change notification settings - Fork 995
Expand file tree
/
Copy pathfun.py
More file actions
471 lines (392 loc) · 16.7 KB
/
Copy pathfun.py
File metadata and controls
471 lines (392 loc) · 16.7 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
# This module is part of GitPython and is released under the
# 3-Clause BSD License: https://opensource.org/license/bsd-3-clause/
"""Standalone functions to accompany the index implementation and make it more
versatile."""
__all__ = [
"write_cache",
"read_cache",
"write_tree_from_cache",
"entry_key",
"stat_mode_to_index_mode",
"S_IFGITLINK",
"run_commit_hook",
"hook_path",
]
from io import BytesIO
import os
import os.path as osp
from pathlib import Path
from stat import S_IFDIR, S_IFLNK, S_IFMT, S_IFREG, S_ISDIR, S_ISLNK, S_IXUSR
import subprocess
import sys
from gitdb.base import IStream
from gitdb.typ import str_tree_type
from git.cmd import handle_process_output, safer_popen
from git.compat import defenc, force_bytes, force_text, safe_decode
from git.exc import HookExecutionError, UnmergedEntriesError
from git.objects.fun import (
traverse_tree_recursive,
traverse_trees_recursive,
tree_to_stream,
)
from git.util import IndexFileSHA1Writer, finalize_process
from .typ import CE_EXTENDED, BaseIndexEntry, IndexEntry, CE_NAMEMASK, CE_STAGESHIFT
from .util import pack, unpack
# typing -----------------------------------------------------------------------------
from typing import Dict, IO, List, Sequence, TYPE_CHECKING, Tuple, Type, Union, cast
from git.types import PathLike
if TYPE_CHECKING:
from git.db import GitCmdObjectDB
from git.objects.tree import TreeCacheTup
from .base import IndexFile
# ------------------------------------------------------------------------------------
S_IFGITLINK = S_IFLNK | S_IFDIR
"""Flags for a submodule."""
CE_NAMEMASK_INV = ~CE_NAMEMASK
def hook_path(name: str, git_dir: PathLike) -> str:
""":return: path to the given named hook in the given git repository directory"""
return osp.join(git_dir, "hooks", name)
def _has_file_extension(path: str) -> str:
return osp.splitext(path)[1]
def run_commit_hook(name: str, index: "IndexFile", *args: str) -> None:
"""Run the commit hook of the given name. Silently ignore hooks that do not exist.
:param name:
Name of hook, like ``pre-commit``.
:param index:
:class:`~git.index.base.IndexFile` instance.
:param args:
Arguments passed to hook file.
:raise git.exc.HookExecutionError:
"""
hp = hook_path(name, index.repo.git_dir)
if not os.access(hp, os.X_OK):
return
env = os.environ.copy()
env["GIT_INDEX_FILE"] = safe_decode(os.fspath(index.path))
env["GIT_EDITOR"] = ":"
cmd = [hp]
try:
if sys.platform == "win32" and not _has_file_extension(hp):
# Windows only uses extensions to determine how to open files
# (doesn't understand shebangs). Try using bash to run the hook.
relative_hp = Path(hp).relative_to(index.repo.working_dir).as_posix()
cmd = ["bash.exe", relative_hp]
process = safer_popen(
cmd + list(args),
env=env,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=index.repo.working_dir,
)
except Exception as ex:
raise HookExecutionError(hp, ex) from ex
else:
stdout_list: List[str] = []
stderr_list: List[str] = []
handle_process_output(process, stdout_list.append, stderr_list.append, finalize_process)
stdout = "".join(stdout_list)
stderr = "".join(stderr_list)
if process.returncode != 0:
stdout = force_text(stdout, defenc)
stderr = force_text(stderr, defenc)
raise HookExecutionError(hp, process.returncode, stderr, stdout)
# END handle return code
def stat_mode_to_index_mode(mode: int) -> int:
"""Convert the given mode from a stat call to the corresponding index mode and
return it."""
if S_ISLNK(mode): # symlinks
return S_IFLNK
if S_ISDIR(mode) or S_IFMT(mode) == S_IFGITLINK: # submodules
return S_IFGITLINK
return S_IFREG | (mode & S_IXUSR and 0o755 or 0o644) # blobs with or without executable bit
def write_cache(
entries: Sequence[Union[BaseIndexEntry, "IndexEntry"]],
stream: IO[bytes],
extension_data: Union[None, bytes] = None,
ShaStreamCls: Type[IndexFileSHA1Writer] = IndexFileSHA1Writer,
) -> None:
"""Write the cache represented by entries to a stream.
:param entries:
**Sorted** list of entries.
:param stream:
Stream to wrap into the AdapterStreamCls - it is used for final output.
:param ShaStreamCls:
Type to use when writing to the stream. It produces a sha while writing to it,
before the data is passed on to the wrapped stream.
:param extension_data:
Any kind of data to write as a trailer, it must begin a 4 byte identifier,
followed by its size (4 bytes).
"""
# Wrap the stream into a compatible writer.
stream_sha = ShaStreamCls(stream)
tell = stream_sha.tell
write = stream_sha.write
# Header
version = 3 if any(entry.extended_flags for entry in entries) else 2
write(b"DIRC")
write(pack(">LL", version, len(entries)))
# Body
for entry in entries:
beginoffset = tell()
write(entry.ctime_bytes) # ctime
write(entry.mtime_bytes) # mtime
path_str = str(entry.path)
path: bytes = force_bytes(path_str, encoding=defenc)
plen = len(path) & CE_NAMEMASK # Path length
assert plen == len(path), "Path %s too long to fit into index" % entry.path
flags = plen | (entry.flags & CE_NAMEMASK_INV) # Clear possible previous values.
if entry.extended_flags:
flags |= CE_EXTENDED
write(
pack(
">LLLLLL20sH",
entry.dev,
entry.inode,
entry.mode,
entry.uid,
entry.gid,
entry.size,
entry.binsha,
flags,
)
)
if entry.extended_flags:
write(pack(">H", entry.extended_flags))
write(path)
real_size = (tell() - beginoffset + 8) & ~7
write(b"\0" * ((beginoffset + real_size) - tell()))
# END for each entry
# Write previously cached extensions data.
if extension_data is not None:
stream_sha.write(extension_data)
# Write the sha over the content.
stream_sha.write_sha()
def read_header(stream: IO[bytes]) -> Tuple[int, int]:
"""Return tuple(version_long, num_entries) from the given stream."""
type_id = stream.read(4)
if type_id != b"DIRC":
raise AssertionError("Invalid index file header: %r" % type_id)
unpacked = cast(Tuple[int, int], unpack(">LL", stream.read(4 * 2)))
version, num_entries = unpacked
assert version in (1, 2, 3), "Unsupported git index version %i, only 1, 2, and 3 are supported" % version
return version, num_entries
def entry_key(*entry: Union[BaseIndexEntry, PathLike, int]) -> Tuple[PathLike, int]:
"""
:return:
Key suitable to be used for the
:attr:`index.entries <git.index.base.IndexFile.entries>` dictionary.
:param entry:
One instance of type BaseIndexEntry or the path and the stage.
"""
# def is_entry_key_tup(entry_key: Tuple) -> TypeGuard[Tuple[PathLike, int]]:
# return isinstance(entry_key, tuple) and len(entry_key) == 2
if len(entry) == 1:
entry_first = entry[0]
assert isinstance(entry_first, BaseIndexEntry)
return (entry_first.path, entry_first.stage)
else:
# assert is_entry_key_tup(entry)
entry = cast(Tuple[PathLike, int], entry)
return entry
# END handle entry
def read_cache(
stream: IO[bytes],
) -> Tuple[int, Dict[Tuple[PathLike, int], "IndexEntry"], bytes, bytes]:
"""Read a cache file from the given stream.
:return:
tuple(version, entries_dict, extension_data, content_sha)
* *version* is the integer version number.
* *entries_dict* is a dictionary which maps IndexEntry instances to a path at a
stage.
* *extension_data* is ``""`` or 4 bytes of type + 4 bytes of size + size bytes.
* *content_sha* is a 20 byte sha on all cache file contents.
"""
version, num_entries = read_header(stream)
count = 0
entries: Dict[Tuple[PathLike, int], "IndexEntry"] = {}
read = stream.read
tell = stream.tell
while count < num_entries:
beginoffset = tell()
ctime = unpack(">8s", read(8))[0]
mtime = unpack(">8s", read(8))[0]
(dev, ino, mode, uid, gid, size, sha, flags) = unpack(">LLLLLL20sH", read(20 + 4 * 6 + 2))
extended_flags = 0
if flags & CE_EXTENDED:
extended_flags = unpack(">H", read(2))[0]
path_size = flags & CE_NAMEMASK
path = read(path_size).decode(defenc)
real_size = (tell() - beginoffset + 8) & ~7
read((beginoffset + real_size) - tell())
entry = IndexEntry((mode, sha, flags, path, ctime, mtime, dev, ino, uid, gid, size, extended_flags))
# entry_key would be the method to use, but we save the effort.
entries[(path, entry.stage)] = entry
count += 1
# END for each entry
# The footer contains extension data and a sha on the content so far.
# Keep the extension footer,and verify we have a sha in the end.
# Extension data format is:
# 4 bytes ID
# 4 bytes length of chunk
# Repeated 0 - N times
extension_data = stream.read(~0)
assert len(extension_data) > 19, (
"Index Footer was not at least a sha on content as it was only %i bytes in size" % len(extension_data)
)
content_sha = extension_data[-20:]
# Truncate the sha in the end as we will dynamically create it anyway.
extension_data = extension_data[:-20]
return (version, entries, extension_data, content_sha)
def write_tree_from_cache(
entries: List[IndexEntry], odb: "GitCmdObjectDB", sl: slice, si: int = 0
) -> Tuple[bytes, List["TreeCacheTup"]]:
R"""Create a tree from the given sorted list of entries and put the respective
trees into the given object database.
:param entries:
**Sorted** list of :class:`~git.index.typ.IndexEntry`\s.
:param odb:
Object database to store the trees in.
:param si:
Start index at which we should start creating subtrees.
:param sl:
Slice indicating the range we should process on the entries list.
:return:
tuple(binsha, list(tree_entry, ...))
A tuple of a sha and a list of tree entries being a tuple of hexsha, mode, name.
"""
tree_items: List["TreeCacheTup"] = []
ci = sl.start
end = sl.stop
while ci < end:
entry = entries[ci]
if entry.stage != 0:
raise UnmergedEntriesError(entry)
# END abort on unmerged
ci += 1
rbound = entry.path.find("/", si)
if rbound == -1:
# It's not a tree.
tree_items.append((entry.binsha, entry.mode, entry.path[si:]))
else:
# Find common base range.
base = entry.path[si:rbound]
xi = ci
while xi < end:
oentry = entries[xi]
orbound = oentry.path.find("/", si)
if orbound == -1 or oentry.path[si:orbound] != base:
break
# END abort on base mismatch
xi += 1
# END find common base
# Enter recursion.
# ci - 1 as we want to count our current item as well.
sha, _tree_entry_list = write_tree_from_cache(entries, odb, slice(ci - 1, xi), rbound + 1)
tree_items.append((sha, S_IFDIR, base))
# Skip ahead.
ci = xi
# END handle bounds
# END for each entry
# Finally create the tree.
sio = BytesIO()
tree_to_stream(tree_items, sio.write) # Writes to stream as bytes, but doesn't change tree_items.
sio.seek(0)
istream = odb.store(IStream(str_tree_type, len(sio.getvalue()), sio))
return (istream.binsha, tree_items)
def _tree_entry_to_baseindexentry(tree_entry: "TreeCacheTup", stage: int) -> BaseIndexEntry:
return BaseIndexEntry((tree_entry[1], tree_entry[0], stage << CE_STAGESHIFT, tree_entry[2]))
def aggressive_tree_merge(odb: "GitCmdObjectDB", tree_shas: Sequence[bytes]) -> List[BaseIndexEntry]:
R"""
:return:
List of :class:`~git.index.typ.BaseIndexEntry`\s representing the aggressive
merge of the given trees. All valid entries are on stage 0, whereas the
conflicting ones are left on stage 1, 2 or 3, whereas stage 1 corresponds to the
common ancestor tree, 2 to our tree and 3 to 'their' tree.
:param tree_shas:
1, 2 or 3 trees as identified by their binary 20 byte shas. If 1 or two, the
entries will effectively correspond to the last given tree. If 3 are given, a 3
way merge is performed.
"""
out: List[BaseIndexEntry] = []
# One and two way is the same for us, as we don't have to handle an existing
# index, instrea
if len(tree_shas) in (1, 2):
for entry in traverse_tree_recursive(odb, tree_shas[-1], ""):
out.append(_tree_entry_to_baseindexentry(entry, 0))
# END for each entry
return out
# END handle single tree
if len(tree_shas) > 3:
raise ValueError("Cannot handle %i trees at once" % len(tree_shas))
# Three trees.
for base, ours, theirs in traverse_trees_recursive(odb, tree_shas, ""):
if base is not None:
# Base version exists.
if ours is not None:
# Ours exists.
if theirs is not None:
# It exists in all branches. Ff it was changed in both
# its a conflict. Otherwise, we take the changed version.
# This should be the most common branch, so it comes first.
if (base[0] != ours[0] and base[0] != theirs[0] and ours[0] != theirs[0]) or (
base[1] != ours[1] and base[1] != theirs[1] and ours[1] != theirs[1]
):
# Changed by both.
out.append(_tree_entry_to_baseindexentry(base, 1))
out.append(_tree_entry_to_baseindexentry(ours, 2))
out.append(_tree_entry_to_baseindexentry(theirs, 3))
elif base[0] != ours[0] or base[1] != ours[1]:
# Only we changed it.
out.append(_tree_entry_to_baseindexentry(ours, 0))
else:
# Either nobody changed it, or they did. In either
# case, use theirs.
out.append(_tree_entry_to_baseindexentry(theirs, 0))
# END handle modification
else:
if ours[0] != base[0] or ours[1] != base[1]:
# They deleted it, we changed it, conflict.
out.append(_tree_entry_to_baseindexentry(base, 1))
out.append(_tree_entry_to_baseindexentry(ours, 2))
# else:
# # We didn't change it, ignore.
# pass
# END handle our change
# END handle theirs
else:
if theirs is None:
# Deleted in both, its fine - it's out.
pass
else:
if theirs[0] != base[0] or theirs[1] != base[1]:
# Deleted in ours, changed theirs, conflict.
out.append(_tree_entry_to_baseindexentry(base, 1))
out.append(_tree_entry_to_baseindexentry(theirs, 3))
# END theirs changed
# else:
# # Theirs didn't change.
# pass
# END handle theirs
# END handle ours
else:
# All three can't be None.
if ours is None:
# Added in their branch.
assert theirs is not None
out.append(_tree_entry_to_baseindexentry(theirs, 0))
elif theirs is None:
# Added in our branch.
out.append(_tree_entry_to_baseindexentry(ours, 0))
else:
# Both have it, except for the base, see whether it changed.
if ours[0] != theirs[0] or ours[1] != theirs[1]:
out.append(_tree_entry_to_baseindexentry(ours, 2))
out.append(_tree_entry_to_baseindexentry(theirs, 3))
else:
# It was added the same in both.
out.append(_tree_entry_to_baseindexentry(ours, 0))
# END handle two items
# END handle heads
# END handle base exists
# END for each entries tuple
return out
You can’t perform that action at this time.