apply: drop unused "def" parameter from find_name_gnu()
[git/git.git] / bundle.c
CommitLineData
30415d50 1#include "cache.h"
697cc8ef 2#include "lockfile.h"
30415d50 3#include "bundle.h"
cbd53a21 4#include "object-store.h"
109cd76d 5#include "repository.h"
30415d50
JS
6#include "object.h"
7#include "commit.h"
8#include "diff.h"
9#include "revision.h"
10#include "list-objects.h"
11#include "run-command.h"
fa303836 12#include "refs.h"
1e2371ea 13#include "argv-array.h"
30415d50
JS
14
15static const char bundle_signature[] = "# v2 git bundle\n";
16
b8607f35 17static void add_to_ref_list(const struct object_id *oid, const char *name,
30415d50
JS
18 struct ref_list *list)
19{
5cbbe13a 20 ALLOC_GROW(list->list, list->nr + 1, list->alloc);
b8607f35 21 oidcpy(&list->list[list->nr].oid, oid);
30415d50
JS
22 list->list[list->nr].name = xstrdup(name);
23 list->nr++;
24}
25
2727b71f
JH
26static int parse_bundle_header(int fd, struct bundle_header *header,
27 const char *report_path)
f3fa1838 28{
e9ee84cf 29 struct strbuf buf = STRBUF_INIT;
e9ee84cf 30 int status = 0;
30415d50 31
e9ee84cf 32 /* The bundle header begins with the signature */
5e8617f5 33 if (strbuf_getwholeline_fd(&buf, fd, '\n') ||
e9ee84cf 34 strcmp(buf.buf, bundle_signature)) {
2727b71f 35 if (report_path)
8a1e7eac 36 error(_("'%s' does not look like a v2 bundle file"),
2727b71f 37 report_path);
e9ee84cf
JH
38 status = -1;
39 goto abort;
30415d50 40 }
e9ee84cf
JH
41
42 /* The bundle header ends with an empty line */
5e8617f5 43 while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
e9ee84cf 44 buf.len && buf.buf[0] != '\n') {
b8607f35 45 struct object_id oid;
e9ee84cf 46 int is_prereq = 0;
b8607f35 47 const char *p;
e9ee84cf
JH
48
49 if (*buf.buf == '-') {
50 is_prereq = 1;
51 strbuf_remove(&buf, 0, 1);
30415d50 52 }
e9ee84cf 53 strbuf_rtrim(&buf);
30415d50 54
e9ee84cf
JH
55 /*
56 * Tip lines have object name, SP, and refname.
57 * Prerequisites have object name that is optionally
58 * followed by SP and subject line.
59 */
b8607f35 60 if (parse_oid_hex(buf.buf, &oid, &p) ||
61 (*p && !isspace(*p)) ||
62 (!is_prereq && !*p)) {
2727b71f 63 if (report_path)
8a1e7eac 64 error(_("unrecognized header: %s%s (%d)"),
2727b71f 65 (is_prereq ? "-" : ""), buf.buf, (int)buf.len);
e9ee84cf
JH
66 status = -1;
67 break;
68 } else {
69 if (is_prereq)
b8607f35 70 add_to_ref_list(&oid, "", &header->prerequisites);
e9ee84cf 71 else
b8607f35 72 add_to_ref_list(&oid, p + 1, &header->references);
30415d50 73 }
30415d50 74 }
e9ee84cf
JH
75
76 abort:
77 if (status) {
78 close(fd);
79 fd = -1;
30415d50 80 }
e9ee84cf 81 strbuf_release(&buf);
30415d50
JS
82 return fd;
83}
84
2727b71f
JH
85int read_bundle_header(const char *path, struct bundle_header *header)
86{
87 int fd = open(path, O_RDONLY);
88
30415d50 89 if (fd < 0)
8a1e7eac 90 return error(_("could not open '%s'"), path);
2727b71f
JH
91 return parse_bundle_header(fd, header, path);
92}
93
94int is_bundle(const char *path, int quiet)
95{
96 struct bundle_header header;
97 int fd = open(path, O_RDONLY);
98
99 if (fd < 0)
100 return 0;
101 memset(&header, 0, sizeof(header));
102 fd = parse_bundle_header(fd, &header, quiet ? NULL : path);
103 if (fd >= 0)
104 close(fd);
105 return (fd >= 0);
30415d50
JS
106}
107
108static int list_refs(struct ref_list *r, int argc, const char **argv)
109{
110 int i;
111
112 for (i = 0; i < r->nr; i++) {
113 if (argc > 1) {
114 int j;
115 for (j = 1; j < argc; j++)
116 if (!strcmp(r->list[i].name, argv[j]))
117 break;
118 if (j == argc)
119 continue;
120 }
b8607f35 121 printf("%s %s\n", oid_to_hex(&r->list[i].oid),
30415d50
JS
122 r->list[i].name);
123 }
124 return 0;
125}
126
208acbfb 127/* Remember to update object flag allocation in object.h */
30415d50
JS
128#define PREREQ_MARK (1u<<16)
129
74ae4b63
NTND
130int verify_bundle(struct repository *r,
131 struct bundle_header *header,
132 int verbose)
30415d50
JS
133{
134 /*
135 * Do fast check, then if any prereqs are missing then go line by line
136 * to be verbose about the errors
137 */
138 struct ref_list *p = &header->prerequisites;
139 struct rev_info revs;
a80aad7b 140 const char *argv[] = {NULL, "--all", NULL};
30415d50
JS
141 struct commit *commit;
142 int i, ret = 0, req_nr;
8a1e7eac 143 const char *message = _("Repository lacks these prerequisite commits:");
30415d50 144
74ae4b63 145 repo_init_revisions(r, &revs, NULL);
30415d50
JS
146 for (i = 0; i < p->nr; i++) {
147 struct ref_list_entry *e = p->list + i;
74ae4b63 148 struct object *o = parse_object(r, &e->oid);
30415d50
JS
149 if (o) {
150 o->flags |= PREREQ_MARK;
151 add_pending_object(&revs, o, e->name);
152 continue;
153 }
154 if (++ret == 1)
9db56f71 155 error("%s", message);
b8607f35 156 error("%s %s", oid_to_hex(&e->oid), e->name);
30415d50
JS
157 }
158 if (revs.pending.nr != p->nr)
159 return ret;
160 req_nr = revs.pending.nr;
161 setup_revisions(2, argv, &revs, NULL);
162
3d51e1b5 163 if (prepare_revision_walk(&revs))
8a1e7eac 164 die(_("revision walk setup failed"));
30415d50
JS
165
166 i = req_nr;
167 while (i && (commit = get_revision(&revs)))
168 if (commit->object.flags & PREREQ_MARK)
169 i--;
170
63647391
RS
171 for (i = 0; i < p->nr; i++) {
172 struct ref_list_entry *e = p->list + i;
74ae4b63 173 struct object *o = parse_object(r, &e->oid);
63647391
RS
174 assert(o); /* otherwise we'd have returned early */
175 if (o->flags & SHOWN)
176 continue;
177 if (++ret == 1)
178 error("%s", message);
179 error("%s %s", oid_to_hex(&e->oid), e->name);
180 }
30415d50 181
b2ccdf7f 182 /* Clean up objects used, as they will be reused. */
63647391
RS
183 for (i = 0; i < p->nr; i++) {
184 struct ref_list_entry *e = p->list + i;
74ae4b63 185 commit = lookup_commit_reference_gently(r, &e->oid, 1);
63647391
RS
186 if (commit)
187 clear_commit_marks(commit, ALL_REV_FLAGS);
188 }
30415d50
JS
189
190 if (verbose) {
191 struct ref_list *r;
192
193 r = &header->references;
a02ffe0e
LF
194 printf_ln(Q_("The bundle contains this ref:",
195 "The bundle contains these %d refs:",
8a1e7eac
NTND
196 r->nr),
197 r->nr);
30415d50 198 list_refs(r, 0, NULL);
71ba6b10 199 r = &header->prerequisites;
8c3710fd
JH
200 if (!r->nr) {
201 printf_ln(_("The bundle records a complete history."));
202 } else {
a02ffe0e
LF
203 printf_ln(Q_("The bundle requires this ref:",
204 "The bundle requires these %d refs:",
8c3710fd
JH
205 r->nr),
206 r->nr);
207 list_refs(r, 0, NULL);
208 }
30415d50
JS
209 }
210 return ret;
211}
212
213int list_bundle_refs(struct bundle_header *header, int argc, const char **argv)
214{
215 return list_refs(&header->references, argc, argv);
216}
217
c9a42c4a
JS
218static int is_tag_in_date_range(struct object *tag, struct rev_info *revs)
219{
220 unsigned long size;
221 enum object_type type;
64045940 222 char *buf = NULL, *line, *lineend;
dddbad72 223 timestamp_t date;
64045940 224 int result = 1;
c9a42c4a
JS
225
226 if (revs->max_age == -1 && revs->min_age == -1)
64045940 227 goto out;
c9a42c4a 228
b4f5aca4 229 buf = read_object_file(&tag->oid, &type, &size);
c9a42c4a 230 if (!buf)
64045940 231 goto out;
c9a42c4a
JS
232 line = memmem(buf, size, "\ntagger ", 8);
233 if (!line++)
64045940 234 goto out;
2c8544ab
LF
235 lineend = memchr(line, '\n', buf + size - line);
236 line = memchr(line, '>', lineend ? lineend - line : buf + size - line);
c9a42c4a 237 if (!line++)
64045940 238 goto out;
1aeb7e75 239 date = parse_timestamp(line, NULL, 10);
64045940 240 result = (revs->max_age == -1 || revs->max_age < date) &&
c9a42c4a 241 (revs->min_age == -1 || revs->min_age > date);
64045940
RS
242out:
243 free(buf);
244 return result;
c9a42c4a
JS
245}
246
e54c347c 247
2c8ee1f5 248/* Write the pack data to bundle_fd */
e54c347c 249static int write_pack_data(int bundle_fd, struct rev_info *revs)
5e626b91
JH
250{
251 struct child_process pack_objects = CHILD_PROCESS_INIT;
252 int i;
253
254 argv_array_pushl(&pack_objects.args,
255 "pack-objects", "--all-progress-implied",
256 "--stdout", "--thin", "--delta-base-offset",
257 NULL);
258 pack_objects.in = -1;
259 pack_objects.out = bundle_fd;
260 pack_objects.git_cmd = 1;
2c8ee1f5
JK
261
262 /*
263 * start_command() will close our descriptor if it's >1. Duplicate it
264 * to avoid surprising the caller.
265 */
266 if (pack_objects.out > 1) {
267 pack_objects.out = dup(pack_objects.out);
268 if (pack_objects.out < 0) {
269 error_errno(_("unable to dup bundle descriptor"));
270 child_process_clear(&pack_objects);
271 return -1;
272 }
273 }
274
5e626b91
JH
275 if (start_command(&pack_objects))
276 return error(_("Could not spawn pack-objects"));
277
5e626b91
JH
278 for (i = 0; i < revs->pending.nr; i++) {
279 struct object *object = revs->pending.objects[i].item;
280 if (object->flags & UNINTERESTING)
281 write_or_die(pack_objects.in, "^", 1);
f2fd0760 282 write_or_die(pack_objects.in, oid_to_hex(&object->oid), GIT_SHA1_HEXSZ);
5e626b91
JH
283 write_or_die(pack_objects.in, "\n", 1);
284 }
285 close(pack_objects.in);
286 if (finish_command(&pack_objects))
287 return error(_("pack-objects died"));
288 return 0;
289}
290
e8eb2512
JH
291static int compute_and_write_prerequisites(int bundle_fd,
292 struct rev_info *revs,
293 int argc, const char **argv)
30415d50 294{
d3180279 295 struct child_process rls = CHILD_PROCESS_INIT;
e8eb2512 296 struct strbuf buf = STRBUF_INIT;
30415d50 297 FILE *rls_fout;
e8eb2512 298 int i;
30415d50 299
92859f3a 300 argv_array_pushl(&rls.args,
1e2371ea
JH
301 "rev-list", "--boundary", "--pretty=oneline",
302 NULL);
303 for (i = 1; i < argc; i++)
92859f3a 304 argv_array_push(&rls.args, argv[i]);
30415d50
JS
305 rls.out = -1;
306 rls.git_cmd = 1;
307 if (start_command(&rls))
308 return -1;
41698375 309 rls_fout = xfdopen(rls.out, "r");
bc2fed49 310 while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) {
b8607f35 311 struct object_id oid;
bc2fed49
TR
312 if (buf.len > 0 && buf.buf[0] == '-') {
313 write_or_die(bundle_fd, buf.buf, buf.len);
b8607f35 314 if (!get_oid_hex(buf.buf + 1, &oid)) {
c251c83d 315 struct object *object = parse_object_or_die(&oid,
316 buf.buf);
30415d50 317 object->flags |= UNINTERESTING;
e8eb2512 318 add_pending_object(revs, object, buf.buf);
30415d50 319 }
b8607f35 320 } else if (!get_oid_hex(buf.buf, &oid)) {
c251c83d 321 struct object *object = parse_object_or_die(&oid,
322 buf.buf);
30415d50
JS
323 object->flags |= SHOWN;
324 }
325 }
bc2fed49 326 strbuf_release(&buf);
30415d50
JS
327 fclose(rls_fout);
328 if (finish_command(&rls))
8a1e7eac 329 return error(_("rev-list died"));
e8eb2512
JH
330 return 0;
331}
332
d9362ef9
JK
333/*
334 * Write out bundle refs based on the tips already
335 * parsed into revs.pending. As a side effect, may
336 * manipulate revs.pending to include additional
337 * necessary objects (like tags).
338 *
339 * Returns the number of refs written, or negative
340 * on error.
341 */
342static int write_bundle_refs(int bundle_fd, struct rev_info *revs)
e8eb2512 343{
d9362ef9
JK
344 int i;
345 int ref_count = 0;
b2a6d1c6 346
d9362ef9
JK
347 for (i = 0; i < revs->pending.nr; i++) {
348 struct object_array_entry *e = revs->pending.objects + i;
f2fd0760 349 struct object_id oid;
30415d50 350 char *ref;
fa303836
JH
351 const char *display_ref;
352 int flag;
30415d50
JS
353
354 if (e->item->flags & UNINTERESTING)
355 continue;
cca5fa64 356 if (dwim_ref(e->name, strlen(e->name), &oid, &ref) != 1)
c8a571d8 357 goto skip_write_ref;
34c290a6 358 if (read_ref_full(e->name, RESOLVE_REF_READING, &oid, &flag))
fa303836
JH
359 flag = 0;
360 display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
361
c9a42c4a 362 if (e->item->type == OBJ_TAG &&
d9362ef9 363 !is_tag_in_date_range(e->item, revs)) {
c9a42c4a 364 e->item->flags |= UNINTERESTING;
c8a571d8 365 goto skip_write_ref;
c9a42c4a
JS
366 }
367
30415d50
JS
368 /*
369 * Make sure the refs we wrote out is correct; --max-count and
370 * other limiting options could have prevented all the tips
371 * from getting output.
372 *
373 * Non commit objects such as tags and blobs do not have
374 * this issue as they are not affected by those extra
375 * constraints.
376 */
377 if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
8a1e7eac 378 warning(_("ref '%s' is excluded by the rev-list options"),
30415d50 379 e->name);
c8a571d8 380 goto skip_write_ref;
30415d50
JS
381 }
382 /*
383 * If you run "git bundle create bndl v1.0..v2.0", the
384 * name of the positive ref is "v2.0" but that is the
385 * commit that is referenced by the tag, and not the tag
386 * itself.
387 */
9001dc2a 388 if (!oideq(&oid, &e->item->oid)) {
30415d50
JS
389 /*
390 * Is this the positive end of a range expressed
391 * in terms of a tag (e.g. v2.0 from the range
392 * "v1.0..v2.0")?
393 */
74ae4b63 394 struct commit *one = lookup_commit_reference(revs->repo, &oid);
30415d50
JS
395 struct object *obj;
396
397 if (e->item == &(one->object)) {
398 /*
399 * Need to include e->name as an
400 * independent ref to the pack-objects
401 * input, so that the tag is included
402 * in the output; otherwise we would
403 * end up triggering "empty bundle"
404 * error.
405 */
c251c83d 406 obj = parse_object_or_die(&oid, e->name);
30415d50 407 obj->flags |= SHOWN;
d9362ef9 408 add_pending_object(revs, obj, e->name);
30415d50 409 }
c8a571d8 410 goto skip_write_ref;
30415d50
JS
411 }
412
413 ref_count++;
f2fd0760 414 write_or_die(bundle_fd, oid_to_hex(&e->item->oid), 40);
30415d50 415 write_or_die(bundle_fd, " ", 1);
fa303836 416 write_or_die(bundle_fd, display_ref, strlen(display_ref));
30415d50 417 write_or_die(bundle_fd, "\n", 1);
c8a571d8 418 skip_write_ref:
30415d50
JS
419 free(ref);
420 }
30415d50
JS
421
422 /* end header */
423 write_or_die(bundle_fd, "\n", 1);
d9362ef9
JK
424 return ref_count;
425}
426
74ae4b63
NTND
427int create_bundle(struct repository *r, struct bundle_header *header,
428 const char *path, int argc, const char **argv)
d9362ef9 429{
b2275868 430 struct lock_file lock = LOCK_INIT;
d9362ef9
JK
431 int bundle_fd = -1;
432 int bundle_to_stdout;
433 int ref_count = 0;
434 struct rev_info revs;
435
436 bundle_to_stdout = !strcmp(path, "-");
437 if (bundle_to_stdout)
438 bundle_fd = 1;
2c8ee1f5 439 else
d9362ef9
JK
440 bundle_fd = hold_lock_file_for_update(&lock, path,
441 LOCK_DIE_ON_ERROR);
442
443 /* write signature */
444 write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
445
446 /* init revs to list objects for pack-objects later */
447 save_commit_buffer = 0;
74ae4b63 448 repo_init_revisions(r, &revs, NULL);
d9362ef9
JK
449
450 /* write prerequisites */
451 if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv))
f5ff5fb5 452 goto err;
d9362ef9
JK
453
454 argc = setup_revisions(argc, argv, &revs, NULL);
455
f5ff5fb5
SB
456 if (argc > 1) {
457 error(_("unrecognized argument: %s"), argv[1]);
458 goto err;
459 }
d9362ef9
JK
460
461 object_array_remove_duplicates(&revs.pending);
462
463 ref_count = write_bundle_refs(bundle_fd, &revs);
464 if (!ref_count)
465 die(_("Refusing to create empty bundle."));
466 else if (ref_count < 0)
f5ff5fb5 467 goto err;
30415d50
JS
468
469 /* write pack */
2c8ee1f5 470 if (write_pack_data(bundle_fd, &revs))
f5ff5fb5 471 goto err;
4ed7cd3a 472
0f5cdf65
CH
473 if (!bundle_to_stdout) {
474 if (commit_lock_file(&lock))
8a1e7eac 475 die_errno(_("cannot create '%s'"), path);
0f5cdf65 476 }
c20181e3 477 return 0;
f5ff5fb5 478err:
2c8ee1f5 479 rollback_lock_file(&lock);
f5ff5fb5 480 return -1;
30415d50
JS
481}
482
74ae4b63
NTND
483int unbundle(struct repository *r, struct bundle_header *header,
484 int bundle_fd, int flags)
30415d50
JS
485{
486 const char *argv_index_pack[] = {"index-pack",
be042aff 487 "--fix-thin", "--stdin", NULL, NULL};
d3180279 488 struct child_process ip = CHILD_PROCESS_INIT;
30415d50 489
be042aff
JH
490 if (flags & BUNDLE_VERBOSE)
491 argv_index_pack[3] = "-v";
492
74ae4b63 493 if (verify_bundle(r, header, 0))
30415d50 494 return -1;
30415d50
JS
495 ip.argv = argv_index_pack;
496 ip.in = bundle_fd;
497 ip.no_stdout = 1;
498 ip.git_cmd = 1;
499 if (run_command(&ip))
8a1e7eac 500 return error(_("index-pack died"));
30415d50
JS
501 return 0;
502}