-
Notifications
You must be signed in to change notification settings - Fork 105
/
options.cc
362 lines (348 loc) · 15.6 KB
/
options.cc
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
// Copyright 2019 Roman Perepelitsa.
//
// This file is part of GitStatus.
//
// GitStatus is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// GitStatus is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with GitStatus. If not, see <https://www.gnu.org/licenses/>.
#include "options.h"
#include <fnmatch.h>
#include <getopt.h>
#include <unistd.h>
#include <algorithm>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include "print.h"
namespace gitstatus {
namespace {
long ParseLong(const char* s) {
errno = 0;
char* end = nullptr;
long res = std::strtol(s, &end, 10);
if (*end || end == s || errno) {
std::cerr << "gitstatusd: not an integer: " << s << std::endl;
std::exit(10);
}
return res;
}
long ParseInt(const char* s) {
long res = ParseLong(s);
if (res < INT_MIN || res > INT_MAX) {
std::cerr << "gitstatusd: integer out of bounds: " << s << std::endl;
std::exit(10);
}
return res;
}
size_t ParseSizeT(const char* s) {
static_assert(sizeof(long) <= sizeof(size_t), "");
long res = ParseLong(s);
return res >= 0 ? res : -1;
}
void PrintUsage() {
std::cout << "Usage: gitstatusd [OPTION]...\n"
<< "Print machine-readable status of the git repos for directories in stdin.\n"
<< "\n"
<< "OPTIONS\n"
<< " -l, --lock-fd=NUM [default=-1]\n"
<< " If non-negative, check whether the specified file descriptor is locked when\n"
<< " not receiving any requests for one second; exit if it isn't locked.\n"
<< "\n"
<< " -p, --parent-pid=NUM [default=-1]\n"
<< " If non-negative, send signal 0 to the specified PID when not receiving any\n"
<< " requests for one second; exit if signal sending fails.\n"
<< "\n"
<< " -t, --num-threads=NUM [default=1]\n"
<< " Use this many threads to scan git workdir for unstaged and untracked files.\n"
<< " Empirically, setting this parameter to twice the number of virtual CPU yields\n"
<< " maximum performance.\n"
<< "\n"
<< " -v, --log-level=STR [default=INFO]\n"
<< " Don't write entries to log whose log level is below this. Log levels in\n"
<< " increasing order: DEBUG, INFO, WARN, ERROR, FATAL.\n"
<< "\n"
<< " -r, --repo-ttl-seconds=NUM [default=3600]\n"
<< " Close git repositories that haven't been used for this long. This is meant to\n"
<< " release resources such as memory and file descriptors. The next request for a\n"
<< " repo that's been closed is much slower than for a repo that hasn't been.\n"
<< " Negative value means infinity.\n"
<< "\n"
<< " -z, --max-commit-summary-length=NUM [default=256]\n"
<< " Truncate commit summary if it's longer than this many bytes.\n"
<< "\n"
<< " -s, --max-num-staged=NUM [default=1]\n"
<< " Report at most this many staged changes; negative value means infinity.\n"
<< "\n"
<< " -u, --max-num-unstaged=NUM [default=1]\n"
<< " Report at most this many unstaged changes; negative value means infinity.\n"
<< "\n"
<< " -c, --max-num-conflicted=NUM [default=1]\n"
<< " Report at most this many conflicted changes; negative value means infinity.\n"
<< "\n"
<< " -d, --max-num-untracked=NUM [default=1]\n"
<< " Report at most this many untracked files; negative value means infinity.\n"
<< "\n"
<< " -m, --dirty-max-index-size=NUM [default=-1]\n"
<< " If a repo has more files in its index than this, override --max-num-unstaged\n"
<< " and --max-num-untracked (but not --max-num-staged) with zeros; negative value\n"
<< " means infinity.\n"
<< "\n"
<< " -e, --recurse-untracked-dirs\n"
<< " Count files within untracked directories like `git status --untracked-files`.\n"
<< "\n"
<< " -U, --ignore-status-show-untracked-files\n"
<< " Unless this option is specified, report zero untracked files for repositories\n"
<< " with status.showUntrackedFiles = false.\n"
<< "\n"
<< " -W, --ignore-bash-show-untracked-files\n"
<< " Unless this option is specified, report zero untracked files for repositories\n"
<< " with bash.showUntrackedFiles = false.\n"
<< "\n"
<< " -D, --ignore-bash-show-dirty-state\n"
<< " Unless this option is specified, report zero staged, unstaged and conflicted\n"
<< " changes for repositories with bash.showDirtyState = false.\n"
<< "\n"
<< " -V, --version\n"
<< " Print gitstatusd version and exit.\n"
<< "\n"
<< " -G, --version-glob=STR [default=*]\n"
<< " Immediately exit with code 11 if gitstatusd version (see --version) doesn't\n"
<< " does not match the specified pattern. Matching is done with fnmatch(3)\n"
<< " without flags.\n"
<< "\n"
<< " -h, --help\n"
<< " Display this help and exit.\n"
<< "\n"
<< "INPUT\n"
<< "\n"
<< " Requests are read from stdin, separated by ascii 30 (record separator). Each\n"
<< " request is made of the following fields, in the specified order, separated by\n"
<< " ascii 31 (unit separator):\n"
<< "\n"
<< " 1. Request ID. Any string. Can be empty.\n"
<< " 2. Path to the directory for which git stats are being requested.\n"
<< " If the first character is ':', it is removed and the remaining path\n"
<< " is treated as GIT_DIR.\n"
<< " 3. (Optional) '1' to disable computation of anything that requires reading\n"
<< " git index; '0' for the default behavior of computing everything.\n"
<< "\n"
<< "OUTPUT\n"
<< "\n"
<< " For every request read from stdin there is response written to stdout.\n"
<< " Responses are separated by ascii 30 (record separator). Each response is made\n"
<< " of the following fields, in the specified order, separated by ascii 31\n"
<< " (unit separator):\n"
<< "\n"
<< " 1. Request id. The same as the first field in the request.\n"
<< " 2. 0 if the directory isn't a git repo, 1 otherwise. If 0, all the\n"
<< " following fields are missing.\n"
<< " 3. Absolute path to the git repository workdir.\n"
<< " 4. Commit hash that HEAD is pointing to. 40 hex digits.\n"
<< " 5. Local branch name or empty if not on a branch.\n"
<< " 6. Upstream branch name. Can be empty.\n"
<< " 7. The remote name, e.g. \"upstream\" or \"origin\".\n"
<< " 8. Remote URL. Can be empty.\n"
<< " 9. Repository state, A.K.A. action. Can be empty.\n"
<< " 10. The number of files in the index.\n"
<< " 11. The number of staged changes.\n"
<< " 12. The number of unstaged changes.\n"
<< " 13. The number of conflicted changes.\n"
<< " 14. The number of untracked files.\n"
<< " 15. Number of commits the current branch is ahead of upstream.\n"
<< " 16. Number of commits the current branch is behind upstream.\n"
<< " 17. The number of stashes.\n"
<< " 18. The last tag (in lexicographical order) that points to the same\n"
<< " commit as HEAD.\n"
<< " 19. The number of unstaged deleted files.\n"
<< " 20. The number of staged new files.\n"
<< " 21. The number of staged deleted files.\n"
<< " 22. The push remote name, e.g. \"upstream\" or \"origin\".\n"
<< " 23. Push remote URL. Can be empty.\n"
<< " 24. Number of commits the current branch is ahead of push remote.\n"
<< " 25. Number of commits the current branch is behind push remote.\n"
<< " 26. Number of files in the index with skip-worktree bit set.\n"
<< " 27. Number of files in the index with assume-unchanged bit set.\n"
<< " 28. Encoding of the HEAD's commit message. Empty value means UTF-8.\n"
<< " 29. The first paragraph of the HEAD's commit message as one line.\n"
<< "\n"
<< "Note: Renamed files are reported as deleted plus new.\n"
<< "\n"
<< "EXAMPLE\n"
<< "\n"
<< " Send a single request and print response (zsh syntax):\n"
<< "\n"
<< " local req_id=id\n"
<< " local dir=$PWD\n"
<< " echo -nE $req_id$'\\x1f'$dir$'\\x1e' | ./gitstatusd | {\n"
<< " local resp\n"
<< " IFS=$'\\x1f' read -rd $'\\x1e' -A resp && print -lr -- \"${(@qq)resp}\"\n"
<< " }\n"
<< "\n"
<< " Output:"
<< "\n"
<< " 'id'\n"
<< " '1'\n"
<< " '/home/romka/gitstatus'\n"
<< " 'bf46bf03dbab7108801b53f8a720caee8464c9c3'\n"
<< " 'master'\n"
<< " 'master'\n"
<< " 'origin'\n"
<< " '[email protected]:romkatv/gitstatus.git'\n"
<< " ''\n"
<< " '70'\n"
<< " '1'\n"
<< " '0'\n"
<< " '0'\n"
<< " '2'\n"
<< " '0'\n"
<< " '0'\n"
<< " ''\n"
<< " '0'\n"
<< " '0'\n"
<< " '0'\n"
<< " ''\n"
<< " ''\n"
<< " '0'\n"
<< " '0'\n"
<< " '0'\n"
<< " '0'\n"
<< " ''\n"
<< " 'add a build server for darwin-arm64'\n"
<< "\n"
<< "EXIT STATUS\n"
<< "\n"
<< " The command returns zero on success (when printing help or on EOF),\n"
<< " non-zero on failure. In the latter case the output is unspecified.\n"
<< "\n"
<< "COPYRIGHT\n"
<< "\n"
<< " Copyright 2019 Roman Perepelitsa\n"
<< " This is free software; see https://github.com/romkatv/gitstatus for copying\n"
<< " conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR\n"
<< " A PARTICULAR PURPOSE." << std::endl;
}
const char* Version() {
#define _INTERNAL_GITSTATUS_STRINGIZE(x) _INTERNAL_GITSTATUS_STRINGIZE_I(x)
#define _INTERNAL_GITSTATUS_STRINGIZE_I(x) #x
return _INTERNAL_GITSTATUS_STRINGIZE(GITSTATUS_VERSION);
#undef _INTERNAL_GITSTATUS_STRINGIZE_I
#undef _INTERNAL_GITSTATUS_STRINGIZE
}
} // namespace
Options ParseOptions(int argc, char** argv) {
const struct option opts[] = {{"help", no_argument, nullptr, 'h'},
{"version", no_argument, nullptr, 'V'},
{"version-glob", required_argument, nullptr, 'G'},
{"lock-fd", required_argument, nullptr, 'l'},
{"parent-pid", required_argument, nullptr, 'p'},
{"num-threads", required_argument, nullptr, 't'},
{"log-level", required_argument, nullptr, 'v'},
{"repo-ttl-seconds", required_argument, nullptr, 'r'},
{"max-commit-summary-length", required_argument, nullptr, 'z'},
{"max-num-staged", required_argument, nullptr, 's'},
{"max-num-unstaged", required_argument, nullptr, 'u'},
{"max-num-conflicted", required_argument, nullptr, 'c'},
{"max-num-untracked", required_argument, nullptr, 'd'},
{"dirty-max-index-size", required_argument, nullptr, 'm'},
{"recurse-untracked-dirs", no_argument, nullptr, 'e'},
{"ignore-status-show-untracked-files", no_argument, nullptr, 'U'},
{"ignore-bash-show-untracked-files", no_argument, nullptr, 'W'},
{"ignore-bash-show-dirty-state", no_argument, nullptr, 'D'},
{}};
Options res;
while (true) {
switch (getopt_long(argc, argv, "hVG:l:p:t:v:r:z:s:u:c:d:m:eUWD", opts, nullptr)) {
case -1:
if (optind != argc) {
std::cerr << "unexpected positional argument: " << argv[optind] << std::endl;
std::exit(10);
}
return res;
case 'h':
PrintUsage();
std::exit(0);
case 'V':
std::cout << Version() << std::endl;
std::exit(0);
case 'G':
if (int err = fnmatch(optarg, Version(), 0)) {
if (err != FNM_NOMATCH) {
std::cerr << "Cannot match " << Print(Version()) << " against pattern "
<< Print(optarg) << ": error " << err;
std::exit(10);
}
std::cerr << "Version mismatch. Wanted (pattern): " << Print(optarg)
<< ". Actual: " << Print(Version()) << "." << std::endl;
std::exit(11);
}
break;
case 'l':
res.lock_fd = ParseInt(optarg);
break;
case 'p':
res.parent_pid = ParseInt(optarg);
break;
case 'v':
if (!ParseLogLevel(optarg, res.log_level)) {
std::cerr << "invalid log level: " << optarg << std::endl;
std::exit(10);
}
break;
case 'r':
res.repo_ttl = std::chrono::seconds(ParseLong(optarg));
break;
case 't': {
long n = ParseLong(optarg);
if (n <= 0) {
std::cerr << "invalid number of threads: " << n << std::endl;
std::exit(10);
}
res.num_threads = n;
break;
}
case 'z':
res.max_commit_summary_length = ParseSizeT(optarg);
break;
case 's':
res.max_num_staged = ParseSizeT(optarg);
break;
case 'u':
res.max_num_unstaged = ParseSizeT(optarg);
break;
case 'c':
res.max_num_conflicted = ParseSizeT(optarg);
break;
case 'd':
res.max_num_untracked = ParseSizeT(optarg);
break;
case 'm':
res.dirty_max_index_size = ParseSizeT(optarg);
break;
case 'e':
res.recurse_untracked_dirs = true;
break;
case 'U':
res.ignore_status_show_untracked_files = true;
break;
case 'W':
res.ignore_bash_show_untracked_files = true;
break;
case 'D':
res.ignore_bash_show_dirty_state = true;
break;
default:
std::exit(10);
}
}
}
} // namespace gitstatus