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
|
/*
* Builtin "git tag"
*
* Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>,
* Carlos Rica <jasampler@gmail.com>
* Based on git-tag.sh and mktag.c by Linus Torvalds.
*/
#include "cache.h"
#include "builtin.h"
#include "refs.h"
#include "tag.h"
#include "run-command.h"
#include "parse-options.h"
static const char * const git_tag_usage[] = {
"git tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]",
"git tag -d <tagname>...",
"git tag -l [-n[<num>]] [<pattern>]",
"git tag -v <tagname>...",
NULL
};
static char signingkey[1000];
struct tag_filter {
const char *pattern;
int lines;
};
#define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----"
static int show_reference(const char *refname, const unsigned char *sha1,
int flag, void *cb_data)
{
struct tag_filter *filter = cb_data;
if (!fnmatch(filter->pattern, refname, 0)) {
int i;
unsigned long size;
enum object_type type;
char *buf, *sp, *eol;
size_t len;
if (!filter->lines) {
printf("%s\n", refname);
return 0;
}
printf("%-15s ", refname);
buf = read_sha1_file(sha1, &type, &size);
if (!buf || !size)
return 0;
/* skip header */
sp = strstr(buf, "\n\n");
if (!sp) {
free(buf);
return 0;
}
/* only take up to "lines" lines, and strip the signature */
for (i = 0, sp += 2;
i < filter->lines && sp < buf + size &&
prefixcmp(sp, PGP_SIGNATURE "\n");
i++) {
if (i)
printf("\n ");
eol = memchr(sp, '\n', size - (sp - buf));
len = eol ? eol - sp : size - (sp - buf);
fwrite(sp, len, 1, stdout);
if (!eol)
break;
sp = eol + 1;
}
putchar('\n');
free(buf);
}
return 0;
}
static int list_tags(const char *pattern, int lines)
{
struct tag_filter filter;
if (pattern == NULL)
pattern = "*";
filter.pattern = pattern;
filter.lines = lines;
for_each_tag_ref(show_reference, (void *) &filter);
return 0;
}
typedef int (*each_tag_name_fn)(const char *name, const char *ref,
const unsigned char *sha1);
static int for_each_tag_name(const char **argv, each_tag_name_fn fn)
{
const char **p;
char ref[PATH_MAX];
int had_error = 0;
unsigned char sha1[20];
for (p = argv; *p; p++) {
if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p)
>= sizeof(ref)) {
error("tag name too long: %.*s...", 50, *p);
had_error = 1;
continue;
}
if (!resolve_ref(ref, sha1, 1, NULL)) {
error("tag '%s' not found.", *p);
had_error = 1;
continue;
}
if (fn(*p, ref, sha1))
had_error = 1;
}
return had_error;
}
static int delete_tag(const char *name, const char *ref,
const unsigned char *sha1)
{
if (delete_ref(ref, sha1))
return 1;
printf("Deleted tag '%s'\n", name);
return 0;
}
static int verify_tag(const char *name, const char *ref,
const unsigned char *sha1)
{
const char *argv_verify_tag[] = {"git-verify-tag",
"-v", "SHA1_HEX", NULL};
argv_verify_tag[2] = sha1_to_hex(sha1);
if (run_command_v_opt(argv_verify_tag, 0))
return error("could not verify the tag '%s'", name);
return 0;
}
static int do_sign(struct strbuf *buffer)
{
struct child_process gpg;
const char *args[4];
char *bracket;
int len;
int i, j;
if (!*signingkey) {
if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME),
sizeof(signingkey)) > sizeof(signingkey) - 1)
return error("committer info too long.");
bracket = strchr(signingkey, '>');
if (bracket)
bracket[1] = '\0';
}
/* When the username signingkey is bad, program could be terminated
* because gpg exits without reading and then write gets SIGPIPE. */
signal(SIGPIPE, SIG_IGN);
memset(&gpg, 0, sizeof(gpg));
gpg.argv = args;
gpg.in = -1;
gpg.out = -1;
args[0] = "gpg";
args[1] = "-bsau";
args[2] = signingkey;
args[3] = NULL;
if (start_command(&gpg))
return error("could not run gpg.");
if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) {
close(gpg.in);
close(gpg.out);
finish_command(&gpg);
return error("gpg did not accept the tag data");
}
close(gpg.in);
len = strbuf_read(buffer, gpg.out, 1024);
close(gpg.out);
if (finish_command(&gpg) || !len || len < 0)
return error("gpg failed to sign the tag");
/* Strip CR from the line endings, in case we are on Windows. */
for (i = j = 0; i < buffer->len; i++)
if (buffer->buf[i] != '\r') {
if (i != j)
buffer->buf[j] = buffer->buf[i];
j++;
}
strbuf_setlen(buffer, j);
return 0;
}
static const char tag_template[] =
"\n"
"#\n"
"# Write a tag message\n"
"#\n";
static void set_signingkey(const char *value)
{
if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey))
die("signing key value too long (%.10s...)", value);
}
static int git_tag_config(const char *var, const char *value, void *cb)
{
if (!strcmp(var, "user.signingkey")) {
if (!value)
return config_error_nonbool(var);
set_signingkey(value);
return 0;
}
return git_default_config(var, value, cb);
}
static void write_tag_body(int fd, const unsigned char *sha1)
{
unsigned long size;
enum object_type type;
char *buf, *sp, *eob;
size_t len;
buf = read_sha1_file(sha1, &type, &size);
if (!buf)
return;
/* skip header */
sp = strstr(buf, "\n\n");
if (!sp || !size || type != OBJ_TAG) {
free(buf);
return;
}
sp += 2; /* skip the 2 LFs */
eob = strstr(sp, "\n" PGP_SIGNATURE "\n");
if (eob)
len = eob - sp;
else
len = buf + size - sp;
write_or_die(fd, sp, len);
free(buf);
}
static void create_tag(const unsigned char *object, const char *tag,
struct strbuf *buf, int message, int sign,
unsigned char *prev, unsigned char *result)
{
enum object_type type;
char header_buf[1024];
int header_len;
type = sha1_object_info(object, NULL);
if (type <= OBJ_NONE)
die("bad object type.");
header_len = snprintf(header_buf, sizeof(header_buf),
"object %s\n"
"type %s\n"
"tag %s\n"
"tagger %s\n\n",
sha1_to_hex(object),
typename(type),
tag,
git_committer_info(IDENT_ERROR_ON_NO_NAME));
if (header_len > sizeof(header_buf) - 1)
die("tag header too big.");
if (!message) {
char *path;
int fd;
/* write the template message before editing: */
path = xstrdup(git_path("TAG_EDITMSG"));
fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600);
if (fd < 0)
die("could not create file '%s': %s",
path, strerror(errno));
if (!is_null_sha1(prev))
write_tag_body(fd, prev);
else
write_or_die(fd, tag_template, strlen(tag_template));
close(fd);
if (launch_editor(path, buf, NULL)) {
fprintf(stderr,
"Please supply the message using either -m or -F option.\n");
exit(1);
}
unlink(path);
free(path);
}
stripspace(buf, 1);
if (!message && !buf->len)
die("no tag message?");
strbuf_insert(buf, 0, header_buf, header_len);
if (sign && do_sign(buf) < 0)
die("unable to sign the tag");
if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0)
die("unable to write tag file");
}
struct msg_arg {
int given;
struct strbuf buf;
};
static int parse_msg_arg(const struct option *opt, const char *arg, int unset)
{
struct msg_arg *msg = opt->value;
if (!arg)
return -1;
if (msg->buf.len)
strbuf_addstr(&(msg->buf), "\n\n");
strbuf_addstr(&(msg->buf), arg);
msg->given = 1;
return 0;
}
int cmd_tag(int argc, const char **argv, const char *prefix)
{
struct strbuf buf;
unsigned char object[20], prev[20];
char ref[PATH_MAX];
const char *object_ref, *tag;
struct ref_lock *lock;
int annotate = 0, sign = 0, force = 0, lines = 0,
list = 0, delete = 0, verify = 0;
const char *msgfile = NULL, *keyid = NULL;
struct msg_arg msg = { 0, STRBUF_INIT };
struct option options[] = {
OPT_BOOLEAN('l', NULL, &list, "list tag names"),
{ OPTION_INTEGER, 'n', NULL, &lines, NULL,
"print n lines of each tag message",
PARSE_OPT_OPTARG, NULL, 1 },
OPT_BOOLEAN('d', NULL, &delete, "delete tags"),
OPT_BOOLEAN('v', NULL, &verify, "verify tags"),
OPT_GROUP("Tag creation options"),
OPT_BOOLEAN('a', NULL, &annotate,
"annotated tag, needs a message"),
OPT_CALLBACK('m', NULL, &msg, "msg",
"message for the tag", parse_msg_arg),
OPT_STRING('F', NULL, &msgfile, "file", "message in a file"),
OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"),
OPT_STRING('u', NULL, &keyid, "key-id",
"use another key to sign the tag"),
OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"),
OPT_END()
};
git_config(git_tag_config, NULL);
argc = parse_options(argc, argv, options, git_tag_usage, 0);
msgfile = parse_options_fix_filename(prefix, msgfile);
if (keyid) {
sign = 1;
set_signingkey(keyid);
}
if (sign)
annotate = 1;
if (list)
return list_tags(argv[0], lines);
if (delete)
return for_each_tag_name(argv, delete_tag);
if (verify)
return for_each_tag_name(argv, verify_tag);
strbuf_init(&buf, 0);
if (msg.given || msgfile) {
if (msg.given && msgfile)
die("only one -F or -m option is allowed.");
annotate = 1;
if (msg.given)
strbuf_addbuf(&buf, &(msg.buf));
else {
if (!strcmp(msgfile, "-")) {
if (strbuf_read(&buf, 0, 1024) < 0)
die("cannot read %s", msgfile);
} else {
if (strbuf_read_file(&buf, msgfile, 1024) < 0)
die("could not open or read '%s': %s",
msgfile, strerror(errno));
}
}
}
if (argc == 0) {
if (annotate)
usage_with_options(git_tag_usage, options);
return list_tags(NULL, lines);
}
tag = argv[0];
object_ref = argc == 2 ? argv[1] : "HEAD";
if (argc > 2)
die("too many params");
if (get_sha1(object_ref, object))
die("Failed to resolve '%s' as a valid ref.", object_ref);
if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1)
die("tag name too long: %.*s...", 50, tag);
if (check_ref_format(ref))
die("'%s' is not a valid tag name.", tag);
if (!resolve_ref(ref, prev, 1, NULL))
hashclr(prev);
else if (!force)
die("tag '%s' already exists", tag);
if (annotate)
create_tag(object, tag, &buf, msg.given || msgfile,
sign, prev, object);
lock = lock_any_ref_for_update(ref, prev, 0);
if (!lock)
die("%s: cannot lock the ref", ref);
if (write_ref_sha1(lock, object, NULL) < 0)
die("%s: cannot update the ref", ref);
strbuf_release(&buf);
return 0;
}
|
