-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathgc.py
294 lines (253 loc) · 9.2 KB
/
gc.py
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
# Copyright (C) 2024 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
from typing import List, Set
from command import Command
from git_command import GitCommand
import platform_utils
from progress import Progress
from project import Project
class Gc(Command):
COMMON = True
helpSummary = "Cleaning up internal repo and Git state."
helpUsage = """
%prog
"""
def _Options(self, p):
p.add_option(
"-n",
"--dry-run",
dest="dryrun",
default=False,
action="store_true",
help="do everything except actually delete",
)
p.add_option(
"-y",
"--yes",
default=False,
action="store_true",
help="answer yes to all safe prompts",
)
p.add_option(
"--repack",
default=False,
action="store_true",
help="repack all projects that use partial clone with "
"filter=blob:none",
)
def _find_git_to_delete(
self, to_keep: Set[str], start_dir: str
) -> Set[str]:
"""Searches no longer needed ".git" directories.
Scans the file system starting from `start_dir` and removes all
directories that end with ".git" that are not in the `to_keep` set.
"""
to_delete = set()
for root, dirs, _ in platform_utils.walk(start_dir):
for directory in dirs:
if not directory.endswith(".git"):
continue
path = os.path.join(root, directory)
if path not in to_keep:
to_delete.add(path)
return to_delete
def delete_unused_projects(self, projects: List[Project], opt):
print(f"Scanning filesystem under {self.repodir}...")
project_paths = set()
project_object_paths = set()
for project in projects:
project_paths.add(project.gitdir)
project_object_paths.add(project.objdir)
to_delete = self._find_git_to_delete(
project_paths, os.path.join(self.repodir, "projects")
)
to_delete.update(
self._find_git_to_delete(
project_object_paths,
os.path.join(self.repodir, "project-objects"),
)
)
if not to_delete:
print("Nothing to clean up.")
return 0
print("Identified the following projects are no longer used:")
print("\n".join(to_delete))
print("")
if not opt.yes:
print(
"If you proceed, any local commits in those projects will be "
"destroyed!"
)
ask = input("Proceed? [y/N] ")
if ask.lower() != "y":
return 1
pm = Progress(
"Deleting",
len(to_delete),
delay=False,
quiet=opt.quiet,
show_elapsed=True,
elide=True,
)
for path in to_delete:
if opt.dryrun:
print(f"\nWould have deleted ${path}")
else:
tmp_path = os.path.join(
os.path.dirname(path),
f"to_be_deleted_{os.path.basename(path)}",
)
platform_utils.rename(path, tmp_path)
platform_utils.rmtree(tmp_path)
pm.update(msg=path)
pm.end()
return 0
def _generate_promisor_files(self, pack_dir: str):
"""Generates promisor files for all pack files in the given directory.
Promisor files are empty files with the same name as the corresponding
pack file but with the ".promisor" extension. They are used by Git.
"""
for root, _, files in platform_utils.walk(pack_dir):
for file in files:
if not file.endswith(".pack"):
continue
with open(os.path.join(root, f"{file[:-4]}promisor"), "w"):
pass
def repack_projects(self, projects: List[Project], opt):
repack_projects = []
# Find all projects eligible for repacking:
# - can't be shared
# - have a specific fetch filter
for project in projects:
if project.config.GetBoolean("extensions.preciousObjects"):
continue
if not project.clone_depth:
continue
if project.manifest.CloneFilterForDepth != "blob:none":
continue
repack_projects.append(project)
if opt.dryrun:
print(f"Would have repacked {len(repack_projects)} projects.")
return 0
pm = Progress(
"Repacking (this will take a while)",
len(repack_projects),
delay=False,
quiet=opt.quiet,
show_elapsed=True,
elide=True,
)
for project in repack_projects:
pm.update(msg=f"{project.name}")
pack_dir = os.path.join(project.gitdir, "tmp_repo_repack")
if os.path.isdir(pack_dir):
platform_utils.rmtree(pack_dir)
os.mkdir(pack_dir)
# Prepare workspace for repacking - remove all unreachable refs and
# their objects.
GitCommand(
project,
["reflog", "expire", "--expire-unreachable=all"],
verify_command=True,
).Wait()
pm.update(msg=f"{project.name} | gc", inc=0)
GitCommand(
project,
["gc"],
verify_command=True,
).Wait()
# Get all objects that are reachable from the remote, and pack them.
pm.update(msg=f"{project.name} | generating list of objects", inc=0)
remote_objects_cmd = GitCommand(
project,
[
"rev-list",
"--objects",
f"--remotes={project.remote.name}",
"--filter=blob:none",
"--tags",
],
capture_stdout=True,
verify_command=True,
)
# Get all local objects and pack them.
local_head_objects_cmd = GitCommand(
project,
["rev-list", "--objects", "HEAD^{tree}"],
capture_stdout=True,
verify_command=True,
)
local_objects_cmd = GitCommand(
project,
[
"rev-list",
"--objects",
"--all",
"--reflog",
"--indexed-objects",
"--not",
f"--remotes={project.remote.name}",
"--tags",
],
capture_stdout=True,
verify_command=True,
)
remote_objects_cmd.Wait()
pm.update(msg=f"{project.name} | remote repack", inc=0)
GitCommand(
project,
["pack-objects", os.path.join(pack_dir, "pack")],
input=remote_objects_cmd.stdout,
capture_stderr=True,
capture_stdout=True,
verify_command=True,
).Wait()
# create promisor file for each pack file
self._generate_promisor_files(pack_dir)
local_head_objects_cmd.Wait()
local_objects_cmd.Wait()
pm.update(msg=f"{project.name} | local repack", inc=0)
GitCommand(
project,
["pack-objects", os.path.join(pack_dir, "pack")],
input=local_head_objects_cmd.stdout + local_objects_cmd.stdout,
capture_stderr=True,
capture_stdout=True,
verify_command=True,
).Wait()
# Swap the old pack directory with the new one.
platform_utils.rename(
os.path.join(project.objdir, "objects", "pack"),
os.path.join(project.objdir, "objects", "pack_old"),
)
platform_utils.rename(
pack_dir,
os.path.join(project.objdir, "objects", "pack"),
)
platform_utils.rmtree(
os.path.join(project.objdir, "objects", "pack_old")
)
pm.end()
return 0
def Execute(self, opt, args):
projects: List[Project] = self.GetProjects(
args, all_manifests=not opt.this_manifest_only
)
ret = self.delete_unused_projects(projects, opt)
if ret != 0:
return ret
if not opt.repack:
return
return self.repack_projects(projects, opt)