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upload-pack: pass upload_pack_data to got_oid()
[thirdparty/git.git] / upload-pack.c
1 #include "cache.h"
2 #include "config.h"
3 #include "refs.h"
4 #include "pkt-line.h"
5 #include "sideband.h"
6 #include "repository.h"
7 #include "object-store.h"
8 #include "tag.h"
9 #include "object.h"
10 #include "commit.h"
11 #include "diff.h"
12 #include "revision.h"
13 #include "list-objects.h"
14 #include "list-objects-filter.h"
15 #include "list-objects-filter-options.h"
16 #include "run-command.h"
17 #include "connect.h"
18 #include "sigchain.h"
19 #include "version.h"
20 #include "string-list.h"
21 #include "argv-array.h"
22 #include "prio-queue.h"
23 #include "protocol.h"
24 #include "quote.h"
25 #include "upload-pack.h"
26 #include "serve.h"
27 #include "commit-graph.h"
28 #include "commit-reach.h"
29 #include "shallow.h"
30
31 /* Remember to update object flag allocation in object.h */
32 #define THEY_HAVE (1u << 11)
33 #define OUR_REF (1u << 12)
34 #define WANTED (1u << 13)
35 #define COMMON_KNOWN (1u << 14)
36
37 #define SHALLOW (1u << 16)
38 #define NOT_SHALLOW (1u << 17)
39 #define CLIENT_SHALLOW (1u << 18)
40 #define HIDDEN_REF (1u << 19)
41
42 #define ALL_FLAGS (THEY_HAVE | OUR_REF | WANTED | COMMON_KNOWN | SHALLOW | \
43 NOT_SHALLOW | CLIENT_SHALLOW | HIDDEN_REF)
44
45 static timestamp_t oldest_have;
46
47 /* Enum for allowed unadvertised object request (UOR) */
48 enum allow_uor {
49 /* Allow specifying sha1 if it is a ref tip. */
50 ALLOW_TIP_SHA1 = 0x01,
51 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
52 ALLOW_REACHABLE_SHA1 = 0x02,
53 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
54 ALLOW_ANY_SHA1 = 0x07
55 };
56
57 /*
58 * Please annotate, and if possible group together, fields used only
59 * for protocol v0 or only for protocol v2.
60 */
61 struct upload_pack_data {
62 struct string_list symref; /* v0 only */
63 struct object_array want_obj;
64 struct object_array have_obj;
65 struct oid_array haves; /* v2 only */
66 struct string_list wanted_refs; /* v2 only */
67
68 struct object_array shallows;
69 struct string_list deepen_not;
70 struct object_array extra_edge_obj;
71 int depth;
72 timestamp_t deepen_since;
73 int deepen_rev_list;
74 int deepen_relative;
75 int keepalive;
76 int shallow_nr;
77
78 unsigned int timeout; /* v0 only */
79 enum {
80 NO_MULTI_ACK = 0,
81 MULTI_ACK = 1,
82 MULTI_ACK_DETAILED = 2
83 } multi_ack; /* v0 only */
84
85 /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */
86 int use_sideband;
87
88 enum allow_uor allow_uor;
89
90 struct list_objects_filter_options filter_options;
91
92 struct packet_writer writer;
93
94 const char *pack_objects_hook;
95
96 unsigned stateless_rpc : 1; /* v0 only */
97 unsigned no_done : 1; /* v0 only */
98 unsigned daemon_mode : 1; /* v0 only */
99 unsigned filter_capability_requested : 1; /* v0 only */
100
101 unsigned use_thin_pack : 1;
102 unsigned use_ofs_delta : 1;
103 unsigned no_progress : 1;
104 unsigned use_include_tag : 1;
105 unsigned allow_filter : 1;
106
107 unsigned done : 1; /* v2 only */
108 unsigned allow_ref_in_want : 1; /* v2 only */
109 unsigned allow_sideband_all : 1; /* v2 only */
110 };
111
112 static void upload_pack_data_init(struct upload_pack_data *data)
113 {
114 struct string_list symref = STRING_LIST_INIT_DUP;
115 struct string_list wanted_refs = STRING_LIST_INIT_DUP;
116 struct object_array want_obj = OBJECT_ARRAY_INIT;
117 struct object_array have_obj = OBJECT_ARRAY_INIT;
118 struct oid_array haves = OID_ARRAY_INIT;
119 struct object_array shallows = OBJECT_ARRAY_INIT;
120 struct string_list deepen_not = STRING_LIST_INIT_DUP;
121 struct object_array extra_edge_obj = OBJECT_ARRAY_INIT;
122
123 memset(data, 0, sizeof(*data));
124 data->symref = symref;
125 data->wanted_refs = wanted_refs;
126 data->want_obj = want_obj;
127 data->have_obj = have_obj;
128 data->haves = haves;
129 data->shallows = shallows;
130 data->deepen_not = deepen_not;
131 data->extra_edge_obj = extra_edge_obj;
132 packet_writer_init(&data->writer, 1);
133
134 data->keepalive = 5;
135 }
136
137 static void upload_pack_data_clear(struct upload_pack_data *data)
138 {
139 string_list_clear(&data->symref, 1);
140 string_list_clear(&data->wanted_refs, 1);
141 object_array_clear(&data->want_obj);
142 object_array_clear(&data->have_obj);
143 oid_array_clear(&data->haves);
144 object_array_clear(&data->shallows);
145 string_list_clear(&data->deepen_not, 0);
146 object_array_clear(&data->extra_edge_obj);
147 list_objects_filter_release(&data->filter_options);
148
149 free((char *)data->pack_objects_hook);
150 }
151
152 static void reset_timeout(unsigned int timeout)
153 {
154 alarm(timeout);
155 }
156
157 static void send_client_data(int fd, const char *data, ssize_t sz,
158 int use_sideband)
159 {
160 if (use_sideband) {
161 send_sideband(1, fd, data, sz, use_sideband);
162 return;
163 }
164 if (fd == 3)
165 /* emergency quit */
166 fd = 2;
167 if (fd == 2) {
168 /* XXX: are we happy to lose stuff here? */
169 xwrite(fd, data, sz);
170 return;
171 }
172 write_or_die(fd, data, sz);
173 }
174
175 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
176 {
177 FILE *fp = cb_data;
178 if (graft->nr_parent == -1)
179 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
180 return 0;
181 }
182
183 static void create_pack_file(struct upload_pack_data *pack_data)
184 {
185 struct child_process pack_objects = CHILD_PROCESS_INIT;
186 char data[8193], progress[128];
187 char abort_msg[] = "aborting due to possible repository "
188 "corruption on the remote side.";
189 int buffered = -1;
190 ssize_t sz;
191 int i;
192 FILE *pipe_fd;
193
194 if (!pack_data->pack_objects_hook)
195 pack_objects.git_cmd = 1;
196 else {
197 argv_array_push(&pack_objects.args, pack_data->pack_objects_hook);
198 argv_array_push(&pack_objects.args, "git");
199 pack_objects.use_shell = 1;
200 }
201
202 if (pack_data->shallow_nr) {
203 argv_array_push(&pack_objects.args, "--shallow-file");
204 argv_array_push(&pack_objects.args, "");
205 }
206 argv_array_push(&pack_objects.args, "pack-objects");
207 argv_array_push(&pack_objects.args, "--revs");
208 if (pack_data->use_thin_pack)
209 argv_array_push(&pack_objects.args, "--thin");
210
211 argv_array_push(&pack_objects.args, "--stdout");
212 if (pack_data->shallow_nr)
213 argv_array_push(&pack_objects.args, "--shallow");
214 if (!pack_data->no_progress)
215 argv_array_push(&pack_objects.args, "--progress");
216 if (pack_data->use_ofs_delta)
217 argv_array_push(&pack_objects.args, "--delta-base-offset");
218 if (pack_data->use_include_tag)
219 argv_array_push(&pack_objects.args, "--include-tag");
220 if (pack_data->filter_options.choice) {
221 const char *spec =
222 expand_list_objects_filter_spec(&pack_data->filter_options);
223 if (pack_objects.use_shell) {
224 struct strbuf buf = STRBUF_INIT;
225 sq_quote_buf(&buf, spec);
226 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
227 strbuf_release(&buf);
228 } else {
229 argv_array_pushf(&pack_objects.args, "--filter=%s",
230 spec);
231 }
232 }
233
234 pack_objects.in = -1;
235 pack_objects.out = -1;
236 pack_objects.err = -1;
237
238 if (start_command(&pack_objects))
239 die("git upload-pack: unable to fork git-pack-objects");
240
241 pipe_fd = xfdopen(pack_objects.in, "w");
242
243 if (pack_data->shallow_nr)
244 for_each_commit_graft(write_one_shallow, pipe_fd);
245
246 for (i = 0; i < pack_data->want_obj.nr; i++)
247 fprintf(pipe_fd, "%s\n",
248 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
249 fprintf(pipe_fd, "--not\n");
250 for (i = 0; i < pack_data->have_obj.nr; i++)
251 fprintf(pipe_fd, "%s\n",
252 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
253 for (i = 0; i < pack_data->extra_edge_obj.nr; i++)
254 fprintf(pipe_fd, "%s\n",
255 oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid));
256 fprintf(pipe_fd, "\n");
257 fflush(pipe_fd);
258 fclose(pipe_fd);
259
260 /* We read from pack_objects.err to capture stderr output for
261 * progress bar, and pack_objects.out to capture the pack data.
262 */
263
264 while (1) {
265 struct pollfd pfd[2];
266 int pe, pu, pollsize, polltimeout;
267 int ret;
268
269 reset_timeout(pack_data->timeout);
270
271 pollsize = 0;
272 pe = pu = -1;
273
274 if (0 <= pack_objects.out) {
275 pfd[pollsize].fd = pack_objects.out;
276 pfd[pollsize].events = POLLIN;
277 pu = pollsize;
278 pollsize++;
279 }
280 if (0 <= pack_objects.err) {
281 pfd[pollsize].fd = pack_objects.err;
282 pfd[pollsize].events = POLLIN;
283 pe = pollsize;
284 pollsize++;
285 }
286
287 if (!pollsize)
288 break;
289
290 polltimeout = pack_data->keepalive < 0
291 ? -1
292 : 1000 * pack_data->keepalive;
293
294 ret = poll(pfd, pollsize, polltimeout);
295
296 if (ret < 0) {
297 if (errno != EINTR) {
298 error_errno("poll failed, resuming");
299 sleep(1);
300 }
301 continue;
302 }
303 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
304 /* Status ready; we ship that in the side-band
305 * or dump to the standard error.
306 */
307 sz = xread(pack_objects.err, progress,
308 sizeof(progress));
309 if (0 < sz)
310 send_client_data(2, progress, sz,
311 pack_data->use_sideband);
312 else if (sz == 0) {
313 close(pack_objects.err);
314 pack_objects.err = -1;
315 }
316 else
317 goto fail;
318 /* give priority to status messages */
319 continue;
320 }
321 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
322 /* Data ready; we keep the last byte to ourselves
323 * in case we detect broken rev-list, so that we
324 * can leave the stream corrupted. This is
325 * unfortunate -- unpack-objects would happily
326 * accept a valid packdata with trailing garbage,
327 * so appending garbage after we pass all the
328 * pack data is not good enough to signal
329 * breakage to downstream.
330 */
331 char *cp = data;
332 ssize_t outsz = 0;
333 if (0 <= buffered) {
334 *cp++ = buffered;
335 outsz++;
336 }
337 sz = xread(pack_objects.out, cp,
338 sizeof(data) - outsz);
339 if (0 < sz)
340 ;
341 else if (sz == 0) {
342 close(pack_objects.out);
343 pack_objects.out = -1;
344 }
345 else
346 goto fail;
347 sz += outsz;
348 if (1 < sz) {
349 buffered = data[sz-1] & 0xFF;
350 sz--;
351 }
352 else
353 buffered = -1;
354 send_client_data(1, data, sz,
355 pack_data->use_sideband);
356 }
357
358 /*
359 * We hit the keepalive timeout without saying anything; send
360 * an empty message on the data sideband just to let the other
361 * side know we're still working on it, but don't have any data
362 * yet.
363 *
364 * If we don't have a sideband channel, there's no room in the
365 * protocol to say anything, so those clients are just out of
366 * luck.
367 */
368 if (!ret && pack_data->use_sideband) {
369 static const char buf[] = "0005\1";
370 write_or_die(1, buf, 5);
371 }
372 }
373
374 if (finish_command(&pack_objects)) {
375 error("git upload-pack: git-pack-objects died with error.");
376 goto fail;
377 }
378
379 /* flush the data */
380 if (0 <= buffered) {
381 data[0] = buffered;
382 send_client_data(1, data, 1,
383 pack_data->use_sideband);
384 fprintf(stderr, "flushed.\n");
385 }
386 if (pack_data->use_sideband)
387 packet_flush(1);
388 return;
389
390 fail:
391 send_client_data(3, abort_msg, sizeof(abort_msg),
392 pack_data->use_sideband);
393 die("git upload-pack: %s", abort_msg);
394 }
395
396 static int got_oid(struct upload_pack_data *data,
397 const char *hex, struct object_id *oid)
398 {
399 struct object *o;
400 int we_knew_they_have = 0;
401
402 if (get_oid_hex(hex, oid))
403 die("git upload-pack: expected SHA1 object, got '%s'", hex);
404 if (!has_object_file(oid))
405 return -1;
406
407 o = parse_object(the_repository, oid);
408 if (!o)
409 die("oops (%s)", oid_to_hex(oid));
410 if (o->type == OBJ_COMMIT) {
411 struct commit_list *parents;
412 struct commit *commit = (struct commit *)o;
413 if (o->flags & THEY_HAVE)
414 we_knew_they_have = 1;
415 else
416 o->flags |= THEY_HAVE;
417 if (!oldest_have || (commit->date < oldest_have))
418 oldest_have = commit->date;
419 for (parents = commit->parents;
420 parents;
421 parents = parents->next)
422 parents->item->object.flags |= THEY_HAVE;
423 }
424 if (!we_knew_they_have) {
425 add_object_array(o, NULL, &data->have_obj);
426 return 1;
427 }
428 return 0;
429 }
430
431 static int ok_to_give_up(struct upload_pack_data *data)
432 {
433 uint32_t min_generation = GENERATION_NUMBER_ZERO;
434
435 if (!data->have_obj.nr)
436 return 0;
437
438 return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE,
439 COMMON_KNOWN, oldest_have,
440 min_generation);
441 }
442
443 static int get_common_commits(struct upload_pack_data *data,
444 struct packet_reader *reader)
445 {
446 struct object_id oid;
447 char last_hex[GIT_MAX_HEXSZ + 1];
448 int got_common = 0;
449 int got_other = 0;
450 int sent_ready = 0;
451
452 save_commit_buffer = 0;
453
454 for (;;) {
455 const char *arg;
456
457 reset_timeout(data->timeout);
458
459 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
460 if (data->multi_ack == MULTI_ACK_DETAILED
461 && got_common
462 && !got_other
463 && ok_to_give_up(data)) {
464 sent_ready = 1;
465 packet_write_fmt(1, "ACK %s ready\n", last_hex);
466 }
467 if (data->have_obj.nr == 0 || data->multi_ack)
468 packet_write_fmt(1, "NAK\n");
469
470 if (data->no_done && sent_ready) {
471 packet_write_fmt(1, "ACK %s\n", last_hex);
472 return 0;
473 }
474 if (data->stateless_rpc)
475 exit(0);
476 got_common = 0;
477 got_other = 0;
478 continue;
479 }
480 if (skip_prefix(reader->line, "have ", &arg)) {
481 switch (got_oid(data, arg, &oid)) {
482 case -1: /* they have what we do not */
483 got_other = 1;
484 if (data->multi_ack
485 && ok_to_give_up(data)) {
486 const char *hex = oid_to_hex(&oid);
487 if (data->multi_ack == MULTI_ACK_DETAILED) {
488 sent_ready = 1;
489 packet_write_fmt(1, "ACK %s ready\n", hex);
490 } else
491 packet_write_fmt(1, "ACK %s continue\n", hex);
492 }
493 break;
494 default:
495 got_common = 1;
496 oid_to_hex_r(last_hex, &oid);
497 if (data->multi_ack == MULTI_ACK_DETAILED)
498 packet_write_fmt(1, "ACK %s common\n", last_hex);
499 else if (data->multi_ack)
500 packet_write_fmt(1, "ACK %s continue\n", last_hex);
501 else if (data->have_obj.nr == 1)
502 packet_write_fmt(1, "ACK %s\n", last_hex);
503 break;
504 }
505 continue;
506 }
507 if (!strcmp(reader->line, "done")) {
508 if (data->have_obj.nr > 0) {
509 if (data->multi_ack)
510 packet_write_fmt(1, "ACK %s\n", last_hex);
511 return 0;
512 }
513 packet_write_fmt(1, "NAK\n");
514 return -1;
515 }
516 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
517 }
518 }
519
520 static int is_our_ref(struct object *o, enum allow_uor allow_uor)
521 {
522 int allow_hidden_ref = (allow_uor &
523 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
524 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
525 }
526
527 /*
528 * on successful case, it's up to the caller to close cmd->out
529 */
530 static int do_reachable_revlist(struct child_process *cmd,
531 struct object_array *src,
532 struct object_array *reachable,
533 enum allow_uor allow_uor)
534 {
535 static const char *argv[] = {
536 "rev-list", "--stdin", NULL,
537 };
538 struct object *o;
539 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
540 int i;
541 const unsigned hexsz = the_hash_algo->hexsz;
542
543 cmd->argv = argv;
544 cmd->git_cmd = 1;
545 cmd->no_stderr = 1;
546 cmd->in = -1;
547 cmd->out = -1;
548
549 /*
550 * If the next rev-list --stdin encounters an unknown commit,
551 * it terminates, which will cause SIGPIPE in the write loop
552 * below.
553 */
554 sigchain_push(SIGPIPE, SIG_IGN);
555
556 if (start_command(cmd))
557 goto error;
558
559 namebuf[0] = '^';
560 namebuf[hexsz + 1] = '\n';
561 for (i = get_max_object_index(); 0 < i; ) {
562 o = get_indexed_object(--i);
563 if (!o)
564 continue;
565 if (reachable && o->type == OBJ_COMMIT)
566 o->flags &= ~TMP_MARK;
567 if (!is_our_ref(o, allow_uor))
568 continue;
569 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
570 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
571 goto error;
572 }
573 namebuf[hexsz] = '\n';
574 for (i = 0; i < src->nr; i++) {
575 o = src->objects[i].item;
576 if (is_our_ref(o, allow_uor)) {
577 if (reachable)
578 add_object_array(o, NULL, reachable);
579 continue;
580 }
581 if (reachable && o->type == OBJ_COMMIT)
582 o->flags |= TMP_MARK;
583 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
584 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
585 goto error;
586 }
587 close(cmd->in);
588 cmd->in = -1;
589 sigchain_pop(SIGPIPE);
590
591 return 0;
592
593 error:
594 sigchain_pop(SIGPIPE);
595
596 if (cmd->in >= 0)
597 close(cmd->in);
598 if (cmd->out >= 0)
599 close(cmd->out);
600 return -1;
601 }
602
603 static int get_reachable_list(struct upload_pack_data *data,
604 struct object_array *reachable)
605 {
606 struct child_process cmd = CHILD_PROCESS_INIT;
607 int i;
608 struct object *o;
609 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
610 const unsigned hexsz = the_hash_algo->hexsz;
611
612 if (do_reachable_revlist(&cmd, &data->shallows, reachable,
613 data->allow_uor) < 0)
614 return -1;
615
616 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
617 struct object_id oid;
618 const char *p;
619
620 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
621 break;
622
623 o = lookup_object(the_repository, &oid);
624 if (o && o->type == OBJ_COMMIT) {
625 o->flags &= ~TMP_MARK;
626 }
627 }
628 for (i = get_max_object_index(); 0 < i; i--) {
629 o = get_indexed_object(i - 1);
630 if (o && o->type == OBJ_COMMIT &&
631 (o->flags & TMP_MARK)) {
632 add_object_array(o, NULL, reachable);
633 o->flags &= ~TMP_MARK;
634 }
635 }
636 close(cmd.out);
637
638 if (finish_command(&cmd))
639 return -1;
640
641 return 0;
642 }
643
644 static int has_unreachable(struct object_array *src, enum allow_uor allow_uor)
645 {
646 struct child_process cmd = CHILD_PROCESS_INIT;
647 char buf[1];
648 int i;
649
650 if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0)
651 return 1;
652
653 /*
654 * The commits out of the rev-list are not ancestors of
655 * our ref.
656 */
657 i = read_in_full(cmd.out, buf, 1);
658 if (i)
659 goto error;
660 close(cmd.out);
661 cmd.out = -1;
662
663 /*
664 * rev-list may have died by encountering a bad commit
665 * in the history, in which case we do want to bail out
666 * even when it showed no commit.
667 */
668 if (finish_command(&cmd))
669 goto error;
670
671 /* All the non-tip ones are ancestors of what we advertised */
672 return 0;
673
674 error:
675 sigchain_pop(SIGPIPE);
676 if (cmd.out >= 0)
677 close(cmd.out);
678 return 1;
679 }
680
681 static void check_non_tip(struct upload_pack_data *data)
682 {
683 int i;
684
685 /*
686 * In the normal in-process case without
687 * uploadpack.allowReachableSHA1InWant,
688 * non-tip requests can never happen.
689 */
690 if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1))
691 goto error;
692 if (!has_unreachable(&data->want_obj, data->allow_uor))
693 /* All the non-tip ones are ancestors of what we advertised */
694 return;
695
696 error:
697 /* Pick one of them (we know there at least is one) */
698 for (i = 0; i < data->want_obj.nr; i++) {
699 struct object *o = data->want_obj.objects[i].item;
700 if (!is_our_ref(o, data->allow_uor)) {
701 packet_writer_error(&data->writer,
702 "upload-pack: not our ref %s",
703 oid_to_hex(&o->oid));
704 die("git upload-pack: not our ref %s",
705 oid_to_hex(&o->oid));
706 }
707 }
708 }
709
710 static void send_shallow(struct upload_pack_data *data,
711 struct commit_list *result)
712 {
713 while (result) {
714 struct object *object = &result->item->object;
715 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
716 packet_writer_write(&data->writer, "shallow %s",
717 oid_to_hex(&object->oid));
718 register_shallow(the_repository, &object->oid);
719 data->shallow_nr++;
720 }
721 result = result->next;
722 }
723 }
724
725 static void send_unshallow(struct upload_pack_data *data)
726 {
727 int i;
728
729 for (i = 0; i < data->shallows.nr; i++) {
730 struct object *object = data->shallows.objects[i].item;
731 if (object->flags & NOT_SHALLOW) {
732 struct commit_list *parents;
733 packet_writer_write(&data->writer, "unshallow %s",
734 oid_to_hex(&object->oid));
735 object->flags &= ~CLIENT_SHALLOW;
736 /*
737 * We want to _register_ "object" as shallow, but we
738 * also need to traverse object's parents to deepen a
739 * shallow clone. Unregister it for now so we can
740 * parse and add the parents to the want list, then
741 * re-register it.
742 */
743 unregister_shallow(&object->oid);
744 object->parsed = 0;
745 parse_commit_or_die((struct commit *)object);
746 parents = ((struct commit *)object)->parents;
747 while (parents) {
748 add_object_array(&parents->item->object,
749 NULL, &data->want_obj);
750 parents = parents->next;
751 }
752 add_object_array(object, NULL, &data->extra_edge_obj);
753 }
754 /* make sure commit traversal conforms to client */
755 register_shallow(the_repository, &object->oid);
756 }
757 }
758
759 static int check_ref(const char *refname_full, const struct object_id *oid,
760 int flag, void *cb_data);
761 static void deepen(struct upload_pack_data *data, int depth)
762 {
763 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
764 int i;
765
766 for (i = 0; i < data->shallows.nr; i++) {
767 struct object *object = data->shallows.objects[i].item;
768 object->flags |= NOT_SHALLOW;
769 }
770 } else if (data->deepen_relative) {
771 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
772 struct commit_list *result;
773
774 /*
775 * Checking for reachable shallows requires that our refs be
776 * marked with OUR_REF.
777 */
778 head_ref_namespaced(check_ref, NULL);
779 for_each_namespaced_ref(check_ref, NULL);
780
781 get_reachable_list(data, &reachable_shallows);
782 result = get_shallow_commits(&reachable_shallows,
783 depth + 1,
784 SHALLOW, NOT_SHALLOW);
785 send_shallow(data, result);
786 free_commit_list(result);
787 object_array_clear(&reachable_shallows);
788 } else {
789 struct commit_list *result;
790
791 result = get_shallow_commits(&data->want_obj, depth,
792 SHALLOW, NOT_SHALLOW);
793 send_shallow(data, result);
794 free_commit_list(result);
795 }
796
797 send_unshallow(data);
798 }
799
800 static void deepen_by_rev_list(struct upload_pack_data *data,
801 int ac,
802 const char **av)
803 {
804 struct commit_list *result;
805
806 disable_commit_graph(the_repository);
807 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
808 send_shallow(data, result);
809 free_commit_list(result);
810 send_unshallow(data);
811 }
812
813 /* Returns 1 if a shallow list is sent or 0 otherwise */
814 static int send_shallow_list(struct upload_pack_data *data)
815 {
816 int ret = 0;
817
818 if (data->depth > 0 && data->deepen_rev_list)
819 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
820 if (data->depth > 0) {
821 deepen(data, data->depth);
822 ret = 1;
823 } else if (data->deepen_rev_list) {
824 struct argv_array av = ARGV_ARRAY_INIT;
825 int i;
826
827 argv_array_push(&av, "rev-list");
828 if (data->deepen_since)
829 argv_array_pushf(&av, "--max-age=%"PRItime, data->deepen_since);
830 if (data->deepen_not.nr) {
831 argv_array_push(&av, "--not");
832 for (i = 0; i < data->deepen_not.nr; i++) {
833 struct string_list_item *s = data->deepen_not.items + i;
834 argv_array_push(&av, s->string);
835 }
836 argv_array_push(&av, "--not");
837 }
838 for (i = 0; i < data->want_obj.nr; i++) {
839 struct object *o = data->want_obj.objects[i].item;
840 argv_array_push(&av, oid_to_hex(&o->oid));
841 }
842 deepen_by_rev_list(data, av.argc, av.argv);
843 argv_array_clear(&av);
844 ret = 1;
845 } else {
846 if (data->shallows.nr > 0) {
847 int i;
848 for (i = 0; i < data->shallows.nr; i++)
849 register_shallow(the_repository,
850 &data->shallows.objects[i].item->oid);
851 }
852 }
853
854 data->shallow_nr += data->shallows.nr;
855 return ret;
856 }
857
858 static int process_shallow(const char *line, struct object_array *shallows)
859 {
860 const char *arg;
861 if (skip_prefix(line, "shallow ", &arg)) {
862 struct object_id oid;
863 struct object *object;
864 if (get_oid_hex(arg, &oid))
865 die("invalid shallow line: %s", line);
866 object = parse_object(the_repository, &oid);
867 if (!object)
868 return 1;
869 if (object->type != OBJ_COMMIT)
870 die("invalid shallow object %s", oid_to_hex(&oid));
871 if (!(object->flags & CLIENT_SHALLOW)) {
872 object->flags |= CLIENT_SHALLOW;
873 add_object_array(object, NULL, shallows);
874 }
875 return 1;
876 }
877
878 return 0;
879 }
880
881 static int process_deepen(const char *line, int *depth)
882 {
883 const char *arg;
884 if (skip_prefix(line, "deepen ", &arg)) {
885 char *end = NULL;
886 *depth = (int)strtol(arg, &end, 0);
887 if (!end || *end || *depth <= 0)
888 die("Invalid deepen: %s", line);
889 return 1;
890 }
891
892 return 0;
893 }
894
895 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
896 {
897 const char *arg;
898 if (skip_prefix(line, "deepen-since ", &arg)) {
899 char *end = NULL;
900 *deepen_since = parse_timestamp(arg, &end, 0);
901 if (!end || *end || !deepen_since ||
902 /* revisions.c's max_age -1 is special */
903 *deepen_since == -1)
904 die("Invalid deepen-since: %s", line);
905 *deepen_rev_list = 1;
906 return 1;
907 }
908 return 0;
909 }
910
911 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
912 {
913 const char *arg;
914 if (skip_prefix(line, "deepen-not ", &arg)) {
915 char *ref = NULL;
916 struct object_id oid;
917 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
918 die("git upload-pack: ambiguous deepen-not: %s", line);
919 string_list_append(deepen_not, ref);
920 free(ref);
921 *deepen_rev_list = 1;
922 return 1;
923 }
924 return 0;
925 }
926
927 static void receive_needs(struct upload_pack_data *data,
928 struct packet_reader *reader)
929 {
930 int has_non_tip = 0;
931
932 data->shallow_nr = 0;
933 for (;;) {
934 struct object *o;
935 const char *features;
936 struct object_id oid_buf;
937 const char *arg;
938
939 reset_timeout(data->timeout);
940 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
941 break;
942
943 if (process_shallow(reader->line, &data->shallows))
944 continue;
945 if (process_deepen(reader->line, &data->depth))
946 continue;
947 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
948 continue;
949 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
950 continue;
951
952 if (skip_prefix(reader->line, "filter ", &arg)) {
953 if (!data->filter_capability_requested)
954 die("git upload-pack: filtering capability not negotiated");
955 list_objects_filter_die_if_populated(&data->filter_options);
956 parse_list_objects_filter(&data->filter_options, arg);
957 continue;
958 }
959
960 if (!skip_prefix(reader->line, "want ", &arg) ||
961 parse_oid_hex(arg, &oid_buf, &features))
962 die("git upload-pack: protocol error, "
963 "expected to get object ID, not '%s'", reader->line);
964
965 if (parse_feature_request(features, "deepen-relative"))
966 data->deepen_relative = 1;
967 if (parse_feature_request(features, "multi_ack_detailed"))
968 data->multi_ack = MULTI_ACK_DETAILED;
969 else if (parse_feature_request(features, "multi_ack"))
970 data->multi_ack = MULTI_ACK;
971 if (parse_feature_request(features, "no-done"))
972 data->no_done = 1;
973 if (parse_feature_request(features, "thin-pack"))
974 data->use_thin_pack = 1;
975 if (parse_feature_request(features, "ofs-delta"))
976 data->use_ofs_delta = 1;
977 if (parse_feature_request(features, "side-band-64k"))
978 data->use_sideband = LARGE_PACKET_MAX;
979 else if (parse_feature_request(features, "side-band"))
980 data->use_sideband = DEFAULT_PACKET_MAX;
981 if (parse_feature_request(features, "no-progress"))
982 data->no_progress = 1;
983 if (parse_feature_request(features, "include-tag"))
984 data->use_include_tag = 1;
985 if (data->allow_filter &&
986 parse_feature_request(features, "filter"))
987 data->filter_capability_requested = 1;
988
989 o = parse_object(the_repository, &oid_buf);
990 if (!o) {
991 packet_writer_error(&data->writer,
992 "upload-pack: not our ref %s",
993 oid_to_hex(&oid_buf));
994 die("git upload-pack: not our ref %s",
995 oid_to_hex(&oid_buf));
996 }
997 if (!(o->flags & WANTED)) {
998 o->flags |= WANTED;
999 if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
1000 || is_our_ref(o, data->allow_uor)))
1001 has_non_tip = 1;
1002 add_object_array(o, NULL, &data->want_obj);
1003 }
1004 }
1005
1006 /*
1007 * We have sent all our refs already, and the other end
1008 * should have chosen out of them. When we are operating
1009 * in the stateless RPC mode, however, their choice may
1010 * have been based on the set of older refs advertised
1011 * by another process that handled the initial request.
1012 */
1013 if (has_non_tip)
1014 check_non_tip(data);
1015
1016 if (!data->use_sideband && data->daemon_mode)
1017 data->no_progress = 1;
1018
1019 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1020 return;
1021
1022 if (send_shallow_list(data))
1023 packet_flush(1);
1024 }
1025
1026 /* return non-zero if the ref is hidden, otherwise 0 */
1027 static int mark_our_ref(const char *refname, const char *refname_full,
1028 const struct object_id *oid)
1029 {
1030 struct object *o = lookup_unknown_object(oid);
1031
1032 if (ref_is_hidden(refname, refname_full)) {
1033 o->flags |= HIDDEN_REF;
1034 return 1;
1035 }
1036 o->flags |= OUR_REF;
1037 return 0;
1038 }
1039
1040 static int check_ref(const char *refname_full, const struct object_id *oid,
1041 int flag, void *cb_data)
1042 {
1043 const char *refname = strip_namespace(refname_full);
1044
1045 mark_our_ref(refname, refname_full, oid);
1046 return 0;
1047 }
1048
1049 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1050 {
1051 struct string_list_item *item;
1052
1053 if (!symref->nr)
1054 return;
1055 for_each_string_list_item(item, symref)
1056 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1057 }
1058
1059 static int send_ref(const char *refname, const struct object_id *oid,
1060 int flag, void *cb_data)
1061 {
1062 static const char *capabilities = "multi_ack thin-pack side-band"
1063 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1064 " deepen-relative no-progress include-tag multi_ack_detailed";
1065 const char *refname_nons = strip_namespace(refname);
1066 struct object_id peeled;
1067 struct upload_pack_data *data = cb_data;
1068
1069 if (mark_our_ref(refname_nons, refname, oid))
1070 return 0;
1071
1072 if (capabilities) {
1073 struct strbuf symref_info = STRBUF_INIT;
1074
1075 format_symref_info(&symref_info, &data->symref);
1076 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
1077 oid_to_hex(oid), refname_nons,
1078 0, capabilities,
1079 (data->allow_uor & ALLOW_TIP_SHA1) ?
1080 " allow-tip-sha1-in-want" : "",
1081 (data->allow_uor & ALLOW_REACHABLE_SHA1) ?
1082 " allow-reachable-sha1-in-want" : "",
1083 data->stateless_rpc ? " no-done" : "",
1084 symref_info.buf,
1085 data->allow_filter ? " filter" : "",
1086 git_user_agent_sanitized());
1087 strbuf_release(&symref_info);
1088 } else {
1089 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1090 }
1091 capabilities = NULL;
1092 if (!peel_ref(refname, &peeled))
1093 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1094 return 0;
1095 }
1096
1097 static int find_symref(const char *refname, const struct object_id *oid,
1098 int flag, void *cb_data)
1099 {
1100 const char *symref_target;
1101 struct string_list_item *item;
1102
1103 if ((flag & REF_ISSYMREF) == 0)
1104 return 0;
1105 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1106 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1107 die("'%s' is a symref but it is not?", refname);
1108 item = string_list_append(cb_data, strip_namespace(refname));
1109 item->util = xstrdup(strip_namespace(symref_target));
1110 return 0;
1111 }
1112
1113 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1114 {
1115 struct upload_pack_data *data = cb_data;
1116
1117 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1118 if (git_config_bool(var, value))
1119 data->allow_uor |= ALLOW_TIP_SHA1;
1120 else
1121 data->allow_uor &= ~ALLOW_TIP_SHA1;
1122 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1123 if (git_config_bool(var, value))
1124 data->allow_uor |= ALLOW_REACHABLE_SHA1;
1125 else
1126 data->allow_uor &= ~ALLOW_REACHABLE_SHA1;
1127 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1128 if (git_config_bool(var, value))
1129 data->allow_uor |= ALLOW_ANY_SHA1;
1130 else
1131 data->allow_uor &= ~ALLOW_ANY_SHA1;
1132 } else if (!strcmp("uploadpack.keepalive", var)) {
1133 data->keepalive = git_config_int(var, value);
1134 if (!data->keepalive)
1135 data->keepalive = -1;
1136 } else if (!strcmp("uploadpack.allowfilter", var)) {
1137 data->allow_filter = git_config_bool(var, value);
1138 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1139 data->allow_ref_in_want = git_config_bool(var, value);
1140 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1141 data->allow_sideband_all = git_config_bool(var, value);
1142 } else if (!strcmp("core.precomposeunicode", var)) {
1143 precomposed_unicode = git_config_bool(var, value);
1144 }
1145
1146 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1147 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1148 if (!strcmp("uploadpack.packobjectshook", var))
1149 return git_config_string(&data->pack_objects_hook, var, value);
1150 }
1151
1152 return parse_hide_refs_config(var, value, "uploadpack");
1153 }
1154
1155 void upload_pack(struct upload_pack_options *options)
1156 {
1157 struct packet_reader reader;
1158 struct upload_pack_data data;
1159
1160 upload_pack_data_init(&data);
1161
1162 git_config(upload_pack_config, &data);
1163
1164 data.stateless_rpc = options->stateless_rpc;
1165 data.daemon_mode = options->daemon_mode;
1166 data.timeout = options->timeout;
1167
1168 head_ref_namespaced(find_symref, &data.symref);
1169
1170 if (options->advertise_refs || !data.stateless_rpc) {
1171 reset_timeout(data.timeout);
1172 head_ref_namespaced(send_ref, &data);
1173 for_each_namespaced_ref(send_ref, &data);
1174 advertise_shallow_grafts(1);
1175 packet_flush(1);
1176 } else {
1177 head_ref_namespaced(check_ref, NULL);
1178 for_each_namespaced_ref(check_ref, NULL);
1179 }
1180
1181 if (!options->advertise_refs) {
1182 packet_reader_init(&reader, 0, NULL, 0,
1183 PACKET_READ_CHOMP_NEWLINE |
1184 PACKET_READ_DIE_ON_ERR_PACKET);
1185
1186 receive_needs(&data, &reader);
1187 if (data.want_obj.nr) {
1188 get_common_commits(&data, &reader);
1189 create_pack_file(&data);
1190 }
1191 }
1192
1193 upload_pack_data_clear(&data);
1194 }
1195
1196 static int parse_want(struct packet_writer *writer, const char *line,
1197 struct object_array *want_obj)
1198 {
1199 const char *arg;
1200 if (skip_prefix(line, "want ", &arg)) {
1201 struct object_id oid;
1202 struct object *o;
1203
1204 if (get_oid_hex(arg, &oid))
1205 die("git upload-pack: protocol error, "
1206 "expected to get oid, not '%s'", line);
1207
1208 o = parse_object(the_repository, &oid);
1209 if (!o) {
1210 packet_writer_error(writer,
1211 "upload-pack: not our ref %s",
1212 oid_to_hex(&oid));
1213 die("git upload-pack: not our ref %s",
1214 oid_to_hex(&oid));
1215 }
1216
1217 if (!(o->flags & WANTED)) {
1218 o->flags |= WANTED;
1219 add_object_array(o, NULL, want_obj);
1220 }
1221
1222 return 1;
1223 }
1224
1225 return 0;
1226 }
1227
1228 static int parse_want_ref(struct packet_writer *writer, const char *line,
1229 struct string_list *wanted_refs,
1230 struct object_array *want_obj)
1231 {
1232 const char *arg;
1233 if (skip_prefix(line, "want-ref ", &arg)) {
1234 struct object_id oid;
1235 struct string_list_item *item;
1236 struct object *o;
1237
1238 if (read_ref(arg, &oid)) {
1239 packet_writer_error(writer, "unknown ref %s", arg);
1240 die("unknown ref %s", arg);
1241 }
1242
1243 item = string_list_append(wanted_refs, arg);
1244 item->util = oiddup(&oid);
1245
1246 o = parse_object_or_die(&oid, arg);
1247 if (!(o->flags & WANTED)) {
1248 o->flags |= WANTED;
1249 add_object_array(o, NULL, want_obj);
1250 }
1251
1252 return 1;
1253 }
1254
1255 return 0;
1256 }
1257
1258 static int parse_have(const char *line, struct oid_array *haves)
1259 {
1260 const char *arg;
1261 if (skip_prefix(line, "have ", &arg)) {
1262 struct object_id oid;
1263
1264 if (get_oid_hex(arg, &oid))
1265 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1266 oid_array_append(haves, &oid);
1267 return 1;
1268 }
1269
1270 return 0;
1271 }
1272
1273 static void process_args(struct packet_reader *request,
1274 struct upload_pack_data *data)
1275 {
1276 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1277 const char *arg = request->line;
1278 const char *p;
1279
1280 /* process want */
1281 if (parse_want(&data->writer, arg, &data->want_obj))
1282 continue;
1283 if (data->allow_ref_in_want &&
1284 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1285 &data->want_obj))
1286 continue;
1287 /* process have line */
1288 if (parse_have(arg, &data->haves))
1289 continue;
1290
1291 /* process args like thin-pack */
1292 if (!strcmp(arg, "thin-pack")) {
1293 data->use_thin_pack = 1;
1294 continue;
1295 }
1296 if (!strcmp(arg, "ofs-delta")) {
1297 data->use_ofs_delta = 1;
1298 continue;
1299 }
1300 if (!strcmp(arg, "no-progress")) {
1301 data->no_progress = 1;
1302 continue;
1303 }
1304 if (!strcmp(arg, "include-tag")) {
1305 data->use_include_tag = 1;
1306 continue;
1307 }
1308 if (!strcmp(arg, "done")) {
1309 data->done = 1;
1310 continue;
1311 }
1312
1313 /* Shallow related arguments */
1314 if (process_shallow(arg, &data->shallows))
1315 continue;
1316 if (process_deepen(arg, &data->depth))
1317 continue;
1318 if (process_deepen_since(arg, &data->deepen_since,
1319 &data->deepen_rev_list))
1320 continue;
1321 if (process_deepen_not(arg, &data->deepen_not,
1322 &data->deepen_rev_list))
1323 continue;
1324 if (!strcmp(arg, "deepen-relative")) {
1325 data->deepen_relative = 1;
1326 continue;
1327 }
1328
1329 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1330 list_objects_filter_die_if_populated(&data->filter_options);
1331 parse_list_objects_filter(&data->filter_options, p);
1332 continue;
1333 }
1334
1335 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1336 data->allow_sideband_all) &&
1337 !strcmp(arg, "sideband-all")) {
1338 data->writer.use_sideband = 1;
1339 continue;
1340 }
1341
1342 /* ignore unknown lines maybe? */
1343 die("unexpected line: '%s'", arg);
1344 }
1345
1346 if (request->status != PACKET_READ_FLUSH)
1347 die(_("expected flush after fetch arguments"));
1348 }
1349
1350 static int process_haves(struct upload_pack_data *data, struct oid_array *common)
1351 {
1352 int i;
1353
1354 /* Process haves */
1355 for (i = 0; i < data->haves.nr; i++) {
1356 const struct object_id *oid = &data->haves.oid[i];
1357 struct object *o;
1358 int we_knew_they_have = 0;
1359
1360 if (!has_object_file(oid))
1361 continue;
1362
1363 oid_array_append(common, oid);
1364
1365 o = parse_object(the_repository, oid);
1366 if (!o)
1367 die("oops (%s)", oid_to_hex(oid));
1368 if (o->type == OBJ_COMMIT) {
1369 struct commit_list *parents;
1370 struct commit *commit = (struct commit *)o;
1371 if (o->flags & THEY_HAVE)
1372 we_knew_they_have = 1;
1373 else
1374 o->flags |= THEY_HAVE;
1375 if (!oldest_have || (commit->date < oldest_have))
1376 oldest_have = commit->date;
1377 for (parents = commit->parents;
1378 parents;
1379 parents = parents->next)
1380 parents->item->object.flags |= THEY_HAVE;
1381 }
1382 if (!we_knew_they_have)
1383 add_object_array(o, NULL, &data->have_obj);
1384 }
1385
1386 return 0;
1387 }
1388
1389 static int send_acks(struct upload_pack_data *data, struct oid_array *acks)
1390 {
1391 int i;
1392
1393 packet_writer_write(&data->writer, "acknowledgments\n");
1394
1395 /* Send Acks */
1396 if (!acks->nr)
1397 packet_writer_write(&data->writer, "NAK\n");
1398
1399 for (i = 0; i < acks->nr; i++) {
1400 packet_writer_write(&data->writer, "ACK %s\n",
1401 oid_to_hex(&acks->oid[i]));
1402 }
1403
1404 if (ok_to_give_up(data)) {
1405 /* Send Ready */
1406 packet_writer_write(&data->writer, "ready\n");
1407 return 1;
1408 }
1409
1410 return 0;
1411 }
1412
1413 static int process_haves_and_send_acks(struct upload_pack_data *data)
1414 {
1415 struct oid_array common = OID_ARRAY_INIT;
1416 int ret = 0;
1417
1418 process_haves(data, &common);
1419 if (data->done) {
1420 ret = 1;
1421 } else if (send_acks(data, &common)) {
1422 packet_writer_delim(&data->writer);
1423 ret = 1;
1424 } else {
1425 /* Add Flush */
1426 packet_writer_flush(&data->writer);
1427 ret = 0;
1428 }
1429
1430 oid_array_clear(&data->haves);
1431 oid_array_clear(&common);
1432 return ret;
1433 }
1434
1435 static void send_wanted_ref_info(struct upload_pack_data *data)
1436 {
1437 const struct string_list_item *item;
1438
1439 if (!data->wanted_refs.nr)
1440 return;
1441
1442 packet_writer_write(&data->writer, "wanted-refs\n");
1443
1444 for_each_string_list_item(item, &data->wanted_refs) {
1445 packet_writer_write(&data->writer, "%s %s\n",
1446 oid_to_hex(item->util),
1447 item->string);
1448 }
1449
1450 packet_writer_delim(&data->writer);
1451 }
1452
1453 static void send_shallow_info(struct upload_pack_data *data)
1454 {
1455 /* No shallow info needs to be sent */
1456 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1457 !is_repository_shallow(the_repository))
1458 return;
1459
1460 packet_writer_write(&data->writer, "shallow-info\n");
1461
1462 if (!send_shallow_list(data) &&
1463 is_repository_shallow(the_repository))
1464 deepen(data, INFINITE_DEPTH);
1465
1466 packet_delim(1);
1467 }
1468
1469 enum fetch_state {
1470 FETCH_PROCESS_ARGS = 0,
1471 FETCH_SEND_ACKS,
1472 FETCH_SEND_PACK,
1473 FETCH_DONE,
1474 };
1475
1476 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1477 struct packet_reader *request)
1478 {
1479 enum fetch_state state = FETCH_PROCESS_ARGS;
1480 struct upload_pack_data data;
1481
1482 clear_object_flags(ALL_FLAGS);
1483
1484 upload_pack_data_init(&data);
1485 data.use_sideband = LARGE_PACKET_MAX;
1486
1487 git_config(upload_pack_config, &data);
1488
1489 while (state != FETCH_DONE) {
1490 switch (state) {
1491 case FETCH_PROCESS_ARGS:
1492 process_args(request, &data);
1493
1494 if (!data.want_obj.nr) {
1495 /*
1496 * Request didn't contain any 'want' lines,
1497 * guess they didn't want anything.
1498 */
1499 state = FETCH_DONE;
1500 } else if (data.haves.nr) {
1501 /*
1502 * Request had 'have' lines, so lets ACK them.
1503 */
1504 state = FETCH_SEND_ACKS;
1505 } else {
1506 /*
1507 * Request had 'want's but no 'have's so we can
1508 * immedietly go to construct and send a pack.
1509 */
1510 state = FETCH_SEND_PACK;
1511 }
1512 break;
1513 case FETCH_SEND_ACKS:
1514 if (process_haves_and_send_acks(&data))
1515 state = FETCH_SEND_PACK;
1516 else
1517 state = FETCH_DONE;
1518 break;
1519 case FETCH_SEND_PACK:
1520 send_wanted_ref_info(&data);
1521 send_shallow_info(&data);
1522
1523 packet_writer_write(&data.writer, "packfile\n");
1524 create_pack_file(&data);
1525 state = FETCH_DONE;
1526 break;
1527 case FETCH_DONE:
1528 continue;
1529 }
1530 }
1531
1532 upload_pack_data_clear(&data);
1533 return 0;
1534 }
1535
1536 int upload_pack_advertise(struct repository *r,
1537 struct strbuf *value)
1538 {
1539 if (value) {
1540 int allow_filter_value;
1541 int allow_ref_in_want;
1542 int allow_sideband_all_value;
1543
1544 strbuf_addstr(value, "shallow");
1545
1546 if (!repo_config_get_bool(the_repository,
1547 "uploadpack.allowfilter",
1548 &allow_filter_value) &&
1549 allow_filter_value)
1550 strbuf_addstr(value, " filter");
1551
1552 if (!repo_config_get_bool(the_repository,
1553 "uploadpack.allowrefinwant",
1554 &allow_ref_in_want) &&
1555 allow_ref_in_want)
1556 strbuf_addstr(value, " ref-in-want");
1557
1558 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1559 (!repo_config_get_bool(the_repository,
1560 "uploadpack.allowsidebandall",
1561 &allow_sideband_all_value) &&
1562 allow_sideband_all_value))
1563 strbuf_addstr(value, " sideband-all");
1564 }
1565
1566 return 1;
1567 }
Unnamed repository; edit this file 'description' to name the repository.