f19444df7bc9c19da4d2f3bf831525f7a5d6034d
[git/git.git] / upload-pack.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "pkt-line.h"
4 #include "sideband.h"
5 #include "tag.h"
6 #include "object.h"
7 #include "commit.h"
8 #include "exec_cmd.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "list-objects.h"
12 #include "run-command.h"
13 #include "connect.h"
14 #include "sigchain.h"
15 #include "version.h"
16 #include "string-list.h"
17
18 static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
19
20 /* Remember to update object flag allocation in object.h */
21 #define THEY_HAVE (1u << 11)
22 #define OUR_REF (1u << 12)
23 #define WANTED (1u << 13)
24 #define COMMON_KNOWN (1u << 14)
25 #define REACHABLE (1u << 15)
26
27 #define SHALLOW (1u << 16)
28 #define NOT_SHALLOW (1u << 17)
29 #define CLIENT_SHALLOW (1u << 18)
30 #define HIDDEN_REF (1u << 19)
31
32 static unsigned long oldest_have;
33
34 static int multi_ack;
35 static int no_done;
36 static int use_thin_pack, use_ofs_delta, use_include_tag;
37 static int no_progress, daemon_mode;
38 /* Allow specifying sha1 if it is a ref tip. */
39 #define ALLOW_TIP_SHA1 01
40 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
41 #define ALLOW_REACHABLE_SHA1 02
42 static unsigned int allow_unadvertised_object_request;
43 static int shallow_nr;
44 static struct object_array have_obj;
45 static struct object_array want_obj;
46 static struct object_array extra_edge_obj;
47 static unsigned int timeout;
48 static int keepalive = 5;
49 /* 0 for no sideband,
50 * otherwise maximum packet size (up to 65520 bytes).
51 */
52 static int use_sideband;
53 static int advertise_refs;
54 static int stateless_rpc;
55
56 static void reset_timeout(void)
57 {
58 alarm(timeout);
59 }
60
61 static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
62 {
63 if (use_sideband)
64 return send_sideband(1, fd, data, sz, use_sideband);
65 if (fd == 3)
66 /* emergency quit */
67 fd = 2;
68 if (fd == 2) {
69 /* XXX: are we happy to lose stuff here? */
70 xwrite(fd, data, sz);
71 return sz;
72 }
73 write_or_die(fd, data, sz);
74 return sz;
75 }
76
77 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
78 {
79 FILE *fp = cb_data;
80 if (graft->nr_parent == -1)
81 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
82 return 0;
83 }
84
85 static void create_pack_file(void)
86 {
87 struct child_process pack_objects = CHILD_PROCESS_INIT;
88 char data[8193], progress[128];
89 char abort_msg[] = "aborting due to possible repository "
90 "corruption on the remote side.";
91 int buffered = -1;
92 ssize_t sz;
93 int i;
94 FILE *pipe_fd;
95
96 if (shallow_nr) {
97 argv_array_push(&pack_objects.args, "--shallow-file");
98 argv_array_push(&pack_objects.args, "");
99 }
100 argv_array_push(&pack_objects.args, "pack-objects");
101 argv_array_push(&pack_objects.args, "--revs");
102 if (use_thin_pack)
103 argv_array_push(&pack_objects.args, "--thin");
104
105 argv_array_push(&pack_objects.args, "--stdout");
106 if (shallow_nr)
107 argv_array_push(&pack_objects.args, "--shallow");
108 if (!no_progress)
109 argv_array_push(&pack_objects.args, "--progress");
110 if (use_ofs_delta)
111 argv_array_push(&pack_objects.args, "--delta-base-offset");
112 if (use_include_tag)
113 argv_array_push(&pack_objects.args, "--include-tag");
114
115 pack_objects.in = -1;
116 pack_objects.out = -1;
117 pack_objects.err = -1;
118 pack_objects.git_cmd = 1;
119
120 if (start_command(&pack_objects))
121 die("git upload-pack: unable to fork git-pack-objects");
122
123 pipe_fd = xfdopen(pack_objects.in, "w");
124
125 if (shallow_nr)
126 for_each_commit_graft(write_one_shallow, pipe_fd);
127
128 for (i = 0; i < want_obj.nr; i++)
129 fprintf(pipe_fd, "%s\n",
130 oid_to_hex(&want_obj.objects[i].item->oid));
131 fprintf(pipe_fd, "--not\n");
132 for (i = 0; i < have_obj.nr; i++)
133 fprintf(pipe_fd, "%s\n",
134 oid_to_hex(&have_obj.objects[i].item->oid));
135 for (i = 0; i < extra_edge_obj.nr; i++)
136 fprintf(pipe_fd, "%s\n",
137 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
138 fprintf(pipe_fd, "\n");
139 fflush(pipe_fd);
140 fclose(pipe_fd);
141
142 /* We read from pack_objects.err to capture stderr output for
143 * progress bar, and pack_objects.out to capture the pack data.
144 */
145
146 while (1) {
147 struct pollfd pfd[2];
148 int pe, pu, pollsize;
149 int ret;
150
151 reset_timeout();
152
153 pollsize = 0;
154 pe = pu = -1;
155
156 if (0 <= pack_objects.out) {
157 pfd[pollsize].fd = pack_objects.out;
158 pfd[pollsize].events = POLLIN;
159 pu = pollsize;
160 pollsize++;
161 }
162 if (0 <= pack_objects.err) {
163 pfd[pollsize].fd = pack_objects.err;
164 pfd[pollsize].events = POLLIN;
165 pe = pollsize;
166 pollsize++;
167 }
168
169 if (!pollsize)
170 break;
171
172 ret = poll(pfd, pollsize,
173 keepalive < 0 ? -1 : 1000 * keepalive);
174
175 if (ret < 0) {
176 if (errno != EINTR) {
177 error_errno("poll failed, resuming");
178 sleep(1);
179 }
180 continue;
181 }
182 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
183 /* Status ready; we ship that in the side-band
184 * or dump to the standard error.
185 */
186 sz = xread(pack_objects.err, progress,
187 sizeof(progress));
188 if (0 < sz)
189 send_client_data(2, progress, sz);
190 else if (sz == 0) {
191 close(pack_objects.err);
192 pack_objects.err = -1;
193 }
194 else
195 goto fail;
196 /* give priority to status messages */
197 continue;
198 }
199 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
200 /* Data ready; we keep the last byte to ourselves
201 * in case we detect broken rev-list, so that we
202 * can leave the stream corrupted. This is
203 * unfortunate -- unpack-objects would happily
204 * accept a valid packdata with trailing garbage,
205 * so appending garbage after we pass all the
206 * pack data is not good enough to signal
207 * breakage to downstream.
208 */
209 char *cp = data;
210 ssize_t outsz = 0;
211 if (0 <= buffered) {
212 *cp++ = buffered;
213 outsz++;
214 }
215 sz = xread(pack_objects.out, cp,
216 sizeof(data) - outsz);
217 if (0 < sz)
218 ;
219 else if (sz == 0) {
220 close(pack_objects.out);
221 pack_objects.out = -1;
222 }
223 else
224 goto fail;
225 sz += outsz;
226 if (1 < sz) {
227 buffered = data[sz-1] & 0xFF;
228 sz--;
229 }
230 else
231 buffered = -1;
232 sz = send_client_data(1, data, sz);
233 if (sz < 0)
234 goto fail;
235 }
236
237 /*
238 * We hit the keepalive timeout without saying anything; send
239 * an empty message on the data sideband just to let the other
240 * side know we're still working on it, but don't have any data
241 * yet.
242 *
243 * If we don't have a sideband channel, there's no room in the
244 * protocol to say anything, so those clients are just out of
245 * luck.
246 */
247 if (!ret && use_sideband) {
248 static const char buf[] = "0005\1";
249 write_or_die(1, buf, 5);
250 }
251 }
252
253 if (finish_command(&pack_objects)) {
254 error("git upload-pack: git-pack-objects died with error.");
255 goto fail;
256 }
257
258 /* flush the data */
259 if (0 <= buffered) {
260 data[0] = buffered;
261 sz = send_client_data(1, data, 1);
262 if (sz < 0)
263 goto fail;
264 fprintf(stderr, "flushed.\n");
265 }
266 if (use_sideband)
267 packet_flush(1);
268 return;
269
270 fail:
271 send_client_data(3, abort_msg, sizeof(abort_msg));
272 die("git upload-pack: %s", abort_msg);
273 }
274
275 static int got_sha1(char *hex, unsigned char *sha1)
276 {
277 struct object *o;
278 int we_knew_they_have = 0;
279
280 if (get_sha1_hex(hex, sha1))
281 die("git upload-pack: expected SHA1 object, got '%s'", hex);
282 if (!has_sha1_file(sha1))
283 return -1;
284
285 o = parse_object(sha1);
286 if (!o)
287 die("oops (%s)", sha1_to_hex(sha1));
288 if (o->type == OBJ_COMMIT) {
289 struct commit_list *parents;
290 struct commit *commit = (struct commit *)o;
291 if (o->flags & THEY_HAVE)
292 we_knew_they_have = 1;
293 else
294 o->flags |= THEY_HAVE;
295 if (!oldest_have || (commit->date < oldest_have))
296 oldest_have = commit->date;
297 for (parents = commit->parents;
298 parents;
299 parents = parents->next)
300 parents->item->object.flags |= THEY_HAVE;
301 }
302 if (!we_knew_they_have) {
303 add_object_array(o, NULL, &have_obj);
304 return 1;
305 }
306 return 0;
307 }
308
309 static int reachable(struct commit *want)
310 {
311 struct commit_list *work = NULL;
312
313 commit_list_insert_by_date(want, &work);
314 while (work) {
315 struct commit_list *list;
316 struct commit *commit = pop_commit(&work);
317
318 if (commit->object.flags & THEY_HAVE) {
319 want->object.flags |= COMMON_KNOWN;
320 break;
321 }
322 if (!commit->object.parsed)
323 parse_object(commit->object.oid.hash);
324 if (commit->object.flags & REACHABLE)
325 continue;
326 commit->object.flags |= REACHABLE;
327 if (commit->date < oldest_have)
328 continue;
329 for (list = commit->parents; list; list = list->next) {
330 struct commit *parent = list->item;
331 if (!(parent->object.flags & REACHABLE))
332 commit_list_insert_by_date(parent, &work);
333 }
334 }
335 want->object.flags |= REACHABLE;
336 clear_commit_marks(want, REACHABLE);
337 free_commit_list(work);
338 return (want->object.flags & COMMON_KNOWN);
339 }
340
341 static int ok_to_give_up(void)
342 {
343 int i;
344
345 if (!have_obj.nr)
346 return 0;
347
348 for (i = 0; i < want_obj.nr; i++) {
349 struct object *want = want_obj.objects[i].item;
350
351 if (want->flags & COMMON_KNOWN)
352 continue;
353 want = deref_tag(want, "a want line", 0);
354 if (!want || want->type != OBJ_COMMIT) {
355 /* no way to tell if this is reachable by
356 * looking at the ancestry chain alone, so
357 * leave a note to ourselves not to worry about
358 * this object anymore.
359 */
360 want_obj.objects[i].item->flags |= COMMON_KNOWN;
361 continue;
362 }
363 if (!reachable((struct commit *)want))
364 return 0;
365 }
366 return 1;
367 }
368
369 static int get_common_commits(void)
370 {
371 unsigned char sha1[20];
372 char last_hex[41];
373 int got_common = 0;
374 int got_other = 0;
375 int sent_ready = 0;
376
377 save_commit_buffer = 0;
378
379 for (;;) {
380 char *line = packet_read_line(0, NULL);
381 reset_timeout();
382
383 if (!line) {
384 if (multi_ack == 2 && got_common
385 && !got_other && ok_to_give_up()) {
386 sent_ready = 1;
387 packet_write(1, "ACK %s ready\n", last_hex);
388 }
389 if (have_obj.nr == 0 || multi_ack)
390 packet_write(1, "NAK\n");
391
392 if (no_done && sent_ready) {
393 packet_write(1, "ACK %s\n", last_hex);
394 return 0;
395 }
396 if (stateless_rpc)
397 exit(0);
398 got_common = 0;
399 got_other = 0;
400 continue;
401 }
402 if (starts_with(line, "have ")) {
403 switch (got_sha1(line+5, sha1)) {
404 case -1: /* they have what we do not */
405 got_other = 1;
406 if (multi_ack && ok_to_give_up()) {
407 const char *hex = sha1_to_hex(sha1);
408 if (multi_ack == 2) {
409 sent_ready = 1;
410 packet_write(1, "ACK %s ready\n", hex);
411 } else
412 packet_write(1, "ACK %s continue\n", hex);
413 }
414 break;
415 default:
416 got_common = 1;
417 memcpy(last_hex, sha1_to_hex(sha1), 41);
418 if (multi_ack == 2)
419 packet_write(1, "ACK %s common\n", last_hex);
420 else if (multi_ack)
421 packet_write(1, "ACK %s continue\n", last_hex);
422 else if (have_obj.nr == 1)
423 packet_write(1, "ACK %s\n", last_hex);
424 break;
425 }
426 continue;
427 }
428 if (!strcmp(line, "done")) {
429 if (have_obj.nr > 0) {
430 if (multi_ack)
431 packet_write(1, "ACK %s\n", last_hex);
432 return 0;
433 }
434 packet_write(1, "NAK\n");
435 return -1;
436 }
437 die("git upload-pack: expected SHA1 list, got '%s'", line);
438 }
439 }
440
441 static int is_our_ref(struct object *o)
442 {
443 int allow_hidden_ref = (allow_unadvertised_object_request &
444 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
445 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
446 }
447
448 static void check_non_tip(void)
449 {
450 static const char *argv[] = {
451 "rev-list", "--stdin", NULL,
452 };
453 static struct child_process cmd = CHILD_PROCESS_INIT;
454 struct object *o;
455 char namebuf[42]; /* ^ + SHA-1 + LF */
456 int i;
457
458 /*
459 * In the normal in-process case without
460 * uploadpack.allowReachableSHA1InWant,
461 * non-tip requests can never happen.
462 */
463 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
464 goto error;
465
466 cmd.argv = argv;
467 cmd.git_cmd = 1;
468 cmd.no_stderr = 1;
469 cmd.in = -1;
470 cmd.out = -1;
471
472 if (start_command(&cmd))
473 goto error;
474
475 /*
476 * If rev-list --stdin encounters an unknown commit, it
477 * terminates, which will cause SIGPIPE in the write loop
478 * below.
479 */
480 sigchain_push(SIGPIPE, SIG_IGN);
481
482 namebuf[0] = '^';
483 namebuf[41] = '\n';
484 for (i = get_max_object_index(); 0 < i; ) {
485 o = get_indexed_object(--i);
486 if (!o)
487 continue;
488 if (!is_our_ref(o))
489 continue;
490 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
491 if (write_in_full(cmd.in, namebuf, 42) < 0)
492 goto error;
493 }
494 namebuf[40] = '\n';
495 for (i = 0; i < want_obj.nr; i++) {
496 o = want_obj.objects[i].item;
497 if (is_our_ref(o))
498 continue;
499 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
500 if (write_in_full(cmd.in, namebuf, 41) < 0)
501 goto error;
502 }
503 close(cmd.in);
504
505 sigchain_pop(SIGPIPE);
506
507 /*
508 * The commits out of the rev-list are not ancestors of
509 * our ref.
510 */
511 i = read_in_full(cmd.out, namebuf, 1);
512 if (i)
513 goto error;
514 close(cmd.out);
515
516 /*
517 * rev-list may have died by encountering a bad commit
518 * in the history, in which case we do want to bail out
519 * even when it showed no commit.
520 */
521 if (finish_command(&cmd))
522 goto error;
523
524 /* All the non-tip ones are ancestors of what we advertised */
525 return;
526
527 error:
528 /* Pick one of them (we know there at least is one) */
529 for (i = 0; i < want_obj.nr; i++) {
530 o = want_obj.objects[i].item;
531 if (!is_our_ref(o))
532 die("git upload-pack: not our ref %s",
533 oid_to_hex(&o->oid));
534 }
535 }
536
537 static void receive_needs(void)
538 {
539 struct object_array shallows = OBJECT_ARRAY_INIT;
540 int depth = 0;
541 int has_non_tip = 0;
542
543 shallow_nr = 0;
544 for (;;) {
545 struct object *o;
546 const char *features;
547 unsigned char sha1_buf[20];
548 char *line = packet_read_line(0, NULL);
549 reset_timeout();
550 if (!line)
551 break;
552
553 if (starts_with(line, "shallow ")) {
554 unsigned char sha1[20];
555 struct object *object;
556 if (get_sha1_hex(line + 8, sha1))
557 die("invalid shallow line: %s", line);
558 object = parse_object(sha1);
559 if (!object)
560 continue;
561 if (object->type != OBJ_COMMIT)
562 die("invalid shallow object %s", sha1_to_hex(sha1));
563 if (!(object->flags & CLIENT_SHALLOW)) {
564 object->flags |= CLIENT_SHALLOW;
565 add_object_array(object, NULL, &shallows);
566 }
567 continue;
568 }
569 if (starts_with(line, "deepen ")) {
570 char *end;
571 depth = strtol(line + 7, &end, 0);
572 if (end == line + 7 || depth <= 0)
573 die("Invalid deepen: %s", line);
574 continue;
575 }
576 if (!starts_with(line, "want ") ||
577 get_sha1_hex(line+5, sha1_buf))
578 die("git upload-pack: protocol error, "
579 "expected to get sha, not '%s'", line);
580
581 features = line + 45;
582
583 if (parse_feature_request(features, "multi_ack_detailed"))
584 multi_ack = 2;
585 else if (parse_feature_request(features, "multi_ack"))
586 multi_ack = 1;
587 if (parse_feature_request(features, "no-done"))
588 no_done = 1;
589 if (parse_feature_request(features, "thin-pack"))
590 use_thin_pack = 1;
591 if (parse_feature_request(features, "ofs-delta"))
592 use_ofs_delta = 1;
593 if (parse_feature_request(features, "side-band-64k"))
594 use_sideband = LARGE_PACKET_MAX;
595 else if (parse_feature_request(features, "side-band"))
596 use_sideband = DEFAULT_PACKET_MAX;
597 if (parse_feature_request(features, "no-progress"))
598 no_progress = 1;
599 if (parse_feature_request(features, "include-tag"))
600 use_include_tag = 1;
601
602 o = parse_object(sha1_buf);
603 if (!o)
604 die("git upload-pack: not our ref %s",
605 sha1_to_hex(sha1_buf));
606 if (!(o->flags & WANTED)) {
607 o->flags |= WANTED;
608 if (!is_our_ref(o))
609 has_non_tip = 1;
610 add_object_array(o, NULL, &want_obj);
611 }
612 }
613
614 /*
615 * We have sent all our refs already, and the other end
616 * should have chosen out of them. When we are operating
617 * in the stateless RPC mode, however, their choice may
618 * have been based on the set of older refs advertised
619 * by another process that handled the initial request.
620 */
621 if (has_non_tip)
622 check_non_tip();
623
624 if (!use_sideband && daemon_mode)
625 no_progress = 1;
626
627 if (depth == 0 && shallows.nr == 0)
628 return;
629 if (depth > 0) {
630 struct commit_list *result = NULL, *backup = NULL;
631 int i;
632 if (depth == INFINITE_DEPTH && !is_repository_shallow())
633 for (i = 0; i < shallows.nr; i++) {
634 struct object *object = shallows.objects[i].item;
635 object->flags |= NOT_SHALLOW;
636 }
637 else
638 backup = result =
639 get_shallow_commits(&want_obj, depth,
640 SHALLOW, NOT_SHALLOW);
641 while (result) {
642 struct object *object = &result->item->object;
643 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
644 packet_write(1, "shallow %s",
645 oid_to_hex(&object->oid));
646 register_shallow(object->oid.hash);
647 shallow_nr++;
648 }
649 result = result->next;
650 }
651 free_commit_list(backup);
652 for (i = 0; i < shallows.nr; i++) {
653 struct object *object = shallows.objects[i].item;
654 if (object->flags & NOT_SHALLOW) {
655 struct commit_list *parents;
656 packet_write(1, "unshallow %s",
657 oid_to_hex(&object->oid));
658 object->flags &= ~CLIENT_SHALLOW;
659 /* make sure the real parents are parsed */
660 unregister_shallow(object->oid.hash);
661 object->parsed = 0;
662 parse_commit_or_die((struct commit *)object);
663 parents = ((struct commit *)object)->parents;
664 while (parents) {
665 add_object_array(&parents->item->object,
666 NULL, &want_obj);
667 parents = parents->next;
668 }
669 add_object_array(object, NULL, &extra_edge_obj);
670 }
671 /* make sure commit traversal conforms to client */
672 register_shallow(object->oid.hash);
673 }
674 packet_flush(1);
675 } else
676 if (shallows.nr > 0) {
677 int i;
678 for (i = 0; i < shallows.nr; i++)
679 register_shallow(shallows.objects[i].item->oid.hash);
680 }
681
682 shallow_nr += shallows.nr;
683 free(shallows.objects);
684 }
685
686 /* return non-zero if the ref is hidden, otherwise 0 */
687 static int mark_our_ref(const char *refname, const char *refname_full,
688 const struct object_id *oid)
689 {
690 struct object *o = lookup_unknown_object(oid->hash);
691
692 if (ref_is_hidden(refname, refname_full)) {
693 o->flags |= HIDDEN_REF;
694 return 1;
695 }
696 o->flags |= OUR_REF;
697 return 0;
698 }
699
700 static int check_ref(const char *refname_full, const struct object_id *oid,
701 int flag, void *cb_data)
702 {
703 const char *refname = strip_namespace(refname_full);
704
705 mark_our_ref(refname, refname_full, oid);
706 return 0;
707 }
708
709 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
710 {
711 struct string_list_item *item;
712
713 if (!symref->nr)
714 return;
715 for_each_string_list_item(item, symref)
716 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
717 }
718
719 static int send_ref(const char *refname, const struct object_id *oid,
720 int flag, void *cb_data)
721 {
722 static const char *capabilities = "multi_ack thin-pack side-band"
723 " side-band-64k ofs-delta shallow no-progress"
724 " include-tag multi_ack_detailed";
725 const char *refname_nons = strip_namespace(refname);
726 struct object_id peeled;
727
728 if (mark_our_ref(refname_nons, refname, oid))
729 return 0;
730
731 if (capabilities) {
732 struct strbuf symref_info = STRBUF_INIT;
733
734 format_symref_info(&symref_info, cb_data);
735 packet_write(1, "%s %s%c%s%s%s%s%s agent=%s\n",
736 oid_to_hex(oid), refname_nons,
737 0, capabilities,
738 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
739 " allow-tip-sha1-in-want" : "",
740 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
741 " allow-reachable-sha1-in-want" : "",
742 stateless_rpc ? " no-done" : "",
743 symref_info.buf,
744 git_user_agent_sanitized());
745 strbuf_release(&symref_info);
746 } else {
747 packet_write(1, "%s %s\n", oid_to_hex(oid), refname_nons);
748 }
749 capabilities = NULL;
750 if (!peel_ref(refname, peeled.hash))
751 packet_write(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
752 return 0;
753 }
754
755 static int find_symref(const char *refname, const struct object_id *oid,
756 int flag, void *cb_data)
757 {
758 const char *symref_target;
759 struct string_list_item *item;
760 struct object_id unused;
761
762 if ((flag & REF_ISSYMREF) == 0)
763 return 0;
764 symref_target = resolve_ref_unsafe(refname, 0, unused.hash, &flag);
765 if (!symref_target || (flag & REF_ISSYMREF) == 0)
766 die("'%s' is a symref but it is not?", refname);
767 item = string_list_append(cb_data, refname);
768 item->util = xstrdup(symref_target);
769 return 0;
770 }
771
772 static void upload_pack(void)
773 {
774 struct string_list symref = STRING_LIST_INIT_DUP;
775
776 head_ref_namespaced(find_symref, &symref);
777
778 if (advertise_refs || !stateless_rpc) {
779 reset_timeout();
780 head_ref_namespaced(send_ref, &symref);
781 for_each_namespaced_ref(send_ref, &symref);
782 advertise_shallow_grafts(1);
783 packet_flush(1);
784 } else {
785 head_ref_namespaced(check_ref, NULL);
786 for_each_namespaced_ref(check_ref, NULL);
787 }
788 string_list_clear(&symref, 1);
789 if (advertise_refs)
790 return;
791
792 receive_needs();
793 if (want_obj.nr) {
794 get_common_commits();
795 create_pack_file();
796 }
797 }
798
799 static int upload_pack_config(const char *var, const char *value, void *unused)
800 {
801 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
802 if (git_config_bool(var, value))
803 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
804 else
805 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
806 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
807 if (git_config_bool(var, value))
808 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
809 else
810 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
811 } else if (!strcmp("uploadpack.keepalive", var)) {
812 keepalive = git_config_int(var, value);
813 if (!keepalive)
814 keepalive = -1;
815 }
816 return parse_hide_refs_config(var, value, "uploadpack");
817 }
818
819 int main(int argc, char **argv)
820 {
821 char *dir;
822 int i;
823 int strict = 0;
824
825 git_setup_gettext();
826
827 packet_trace_identity("upload-pack");
828 git_extract_argv0_path(argv[0]);
829 check_replace_refs = 0;
830
831 for (i = 1; i < argc; i++) {
832 char *arg = argv[i];
833
834 if (arg[0] != '-')
835 break;
836 if (!strcmp(arg, "--advertise-refs")) {
837 advertise_refs = 1;
838 continue;
839 }
840 if (!strcmp(arg, "--stateless-rpc")) {
841 stateless_rpc = 1;
842 continue;
843 }
844 if (!strcmp(arg, "--strict")) {
845 strict = 1;
846 continue;
847 }
848 if (starts_with(arg, "--timeout=")) {
849 timeout = atoi(arg+10);
850 daemon_mode = 1;
851 continue;
852 }
853 if (!strcmp(arg, "--")) {
854 i++;
855 break;
856 }
857 }
858
859 if (i != argc-1)
860 usage(upload_pack_usage);
861
862 setup_path();
863
864 dir = argv[i];
865
866 if (!enter_repo(dir, strict))
867 die("'%s' does not appear to be a git repository", dir);
868
869 git_config(upload_pack_config, NULL);
870 upload_pack();
871 return 0;
872 }