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upload-pack: remove superfluous sigchain_pop() call
[alt-git.git] / upload-pack.c
blob2f3ebd88b7fc991c0439bb31efc258e1ab290b30
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 /* Enum for allowed unadvertised object request (UOR) */
46 enum allow_uor {
47 /* Allow specifying sha1 if it is a ref tip. */
48 ALLOW_TIP_SHA1 = 0x01,
49 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
50 ALLOW_REACHABLE_SHA1 = 0x02,
51 /* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
52 ALLOW_ANY_SHA1 = 0x07
53 };
54
55 /*
56 * Please annotate, and if possible group together, fields used only
57 * for protocol v0 or only for protocol v2.
58 */
59 struct upload_pack_data {
60 struct string_list symref; /* v0 only */
61 struct object_array want_obj;
62 struct object_array have_obj;
63 struct oid_array haves; /* v2 only */
64 struct string_list wanted_refs; /* v2 only */
65
66 struct object_array shallows;
67 struct string_list deepen_not;
68 struct object_array extra_edge_obj;
69 int depth;
70 timestamp_t deepen_since;
71 int deepen_rev_list;
72 int deepen_relative;
73 int keepalive;
74 int shallow_nr;
75 timestamp_t oldest_have;
76
77 unsigned int timeout; /* v0 only */
78 enum {
79 NO_MULTI_ACK = 0,
80 MULTI_ACK = 1,
81 MULTI_ACK_DETAILED = 2
82 } multi_ack; /* v0 only */
83
84 /* 0 for no sideband, otherwise DEFAULT_PACKET_MAX or LARGE_PACKET_MAX */
85 int use_sideband;
86
87 struct string_list uri_protocols;
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 string_list uri_protocols = STRING_LIST_INIT_DUP;
122 struct object_array extra_edge_obj = OBJECT_ARRAY_INIT;
123
124 memset(data, 0, sizeof(*data));
125 data->symref = symref;
126 data->wanted_refs = wanted_refs;
127 data->want_obj = want_obj;
128 data->have_obj = have_obj;
129 data->haves = haves;
130 data->shallows = shallows;
131 data->deepen_not = deepen_not;
132 data->uri_protocols = uri_protocols;
133 data->extra_edge_obj = extra_edge_obj;
134 packet_writer_init(&data->writer, 1);
135
136 data->keepalive = 5;
137 }
138
139 static void upload_pack_data_clear(struct upload_pack_data *data)
140 {
141 string_list_clear(&data->symref, 1);
142 string_list_clear(&data->wanted_refs, 1);
143 object_array_clear(&data->want_obj);
144 object_array_clear(&data->have_obj);
145 oid_array_clear(&data->haves);
146 object_array_clear(&data->shallows);
147 string_list_clear(&data->deepen_not, 0);
148 object_array_clear(&data->extra_edge_obj);
149 list_objects_filter_release(&data->filter_options);
150
151 free((char *)data->pack_objects_hook);
152 }
153
154 static void reset_timeout(unsigned int timeout)
155 {
156 alarm(timeout);
157 }
158
159 static void send_client_data(int fd, const char *data, ssize_t sz,
160 int use_sideband)
161 {
162 if (use_sideband) {
163 send_sideband(1, fd, data, sz, use_sideband);
164 return;
165 }
166 if (fd == 3)
167 /* emergency quit */
168 fd = 2;
169 if (fd == 2) {
170 /* XXX: are we happy to lose stuff here? */
171 xwrite(fd, data, sz);
172 return;
173 }
174 write_or_die(fd, data, sz);
175 }
176
177 static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
178 {
179 FILE *fp = cb_data;
180 if (graft->nr_parent == -1)
181 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
182 return 0;
183 }
184
185 struct output_state {
186 char buffer[8193];
187 int used;
188 unsigned packfile_uris_started : 1;
189 unsigned packfile_started : 1;
190 };
191
192 static int relay_pack_data(int pack_objects_out, struct output_state *os,
193 int use_sideband, int write_packfile_line)
194 {
195 /*
196 * We keep the last byte to ourselves
197 * in case we detect broken rev-list, so that we
198 * can leave the stream corrupted. This is
199 * unfortunate -- unpack-objects would happily
200 * accept a valid packdata with trailing garbage,
201 * so appending garbage after we pass all the
202 * pack data is not good enough to signal
203 * breakage to downstream.
204 */
205 ssize_t readsz;
206
207 readsz = xread(pack_objects_out, os->buffer + os->used,
208 sizeof(os->buffer) - os->used);
209 if (readsz < 0) {
210 return readsz;
211 }
212 os->used += readsz;
213
214 while (!os->packfile_started) {
215 char *p;
216 if (os->used >= 4 && !memcmp(os->buffer, "PACK", 4)) {
217 os->packfile_started = 1;
218 if (write_packfile_line) {
219 if (os->packfile_uris_started)
220 packet_delim(1);
221 packet_write_fmt(1, "\1packfile\n");
222 }
223 break;
224 }
225 if ((p = memchr(os->buffer, '\n', os->used))) {
226 if (!os->packfile_uris_started) {
227 os->packfile_uris_started = 1;
228 if (!write_packfile_line)
229 BUG("packfile_uris requires sideband-all");
230 packet_write_fmt(1, "\1packfile-uris\n");
231 }
232 *p = '\0';
233 packet_write_fmt(1, "\1%s\n", os->buffer);
234
235 os->used -= p - os->buffer + 1;
236 memmove(os->buffer, p + 1, os->used);
237 } else {
238 /*
239 * Incomplete line.
240 */
241 return readsz;
242 }
243 }
244
245 if (os->used > 1) {
246 send_client_data(1, os->buffer, os->used - 1, use_sideband);
247 os->buffer[0] = os->buffer[os->used - 1];
248 os->used = 1;
249 } else {
250 send_client_data(1, os->buffer, os->used, use_sideband);
251 os->used = 0;
252 }
253
254 return readsz;
255 }
256
257 static void create_pack_file(struct upload_pack_data *pack_data,
258 const struct string_list *uri_protocols)
259 {
260 struct child_process pack_objects = CHILD_PROCESS_INIT;
261 struct output_state output_state = { { 0 } };
262 char progress[128];
263 char abort_msg[] = "aborting due to possible repository "
264 "corruption on the remote side.";
265 ssize_t sz;
266 int i;
267 FILE *pipe_fd;
268
269 if (!pack_data->pack_objects_hook)
270 pack_objects.git_cmd = 1;
271 else {
272 argv_array_push(&pack_objects.args, pack_data->pack_objects_hook);
273 argv_array_push(&pack_objects.args, "git");
274 pack_objects.use_shell = 1;
275 }
276
277 if (pack_data->shallow_nr) {
278 argv_array_push(&pack_objects.args, "--shallow-file");
279 argv_array_push(&pack_objects.args, "");
280 }
281 argv_array_push(&pack_objects.args, "pack-objects");
282 argv_array_push(&pack_objects.args, "--revs");
283 if (pack_data->use_thin_pack)
284 argv_array_push(&pack_objects.args, "--thin");
285
286 argv_array_push(&pack_objects.args, "--stdout");
287 if (pack_data->shallow_nr)
288 argv_array_push(&pack_objects.args, "--shallow");
289 if (!pack_data->no_progress)
290 argv_array_push(&pack_objects.args, "--progress");
291 if (pack_data->use_ofs_delta)
292 argv_array_push(&pack_objects.args, "--delta-base-offset");
293 if (pack_data->use_include_tag)
294 argv_array_push(&pack_objects.args, "--include-tag");
295 if (pack_data->filter_options.choice) {
296 const char *spec =
297 expand_list_objects_filter_spec(&pack_data->filter_options);
298 if (pack_objects.use_shell) {
299 struct strbuf buf = STRBUF_INIT;
300 sq_quote_buf(&buf, spec);
301 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
302 strbuf_release(&buf);
303 } else {
304 argv_array_pushf(&pack_objects.args, "--filter=%s",
305 spec);
306 }
307 }
308 if (uri_protocols) {
309 for (i = 0; i < uri_protocols->nr; i++)
310 argv_array_pushf(&pack_objects.args, "--uri-protocol=%s",
311 uri_protocols->items[i].string);
312 }
313
314 pack_objects.in = -1;
315 pack_objects.out = -1;
316 pack_objects.err = -1;
317
318 if (start_command(&pack_objects))
319 die("git upload-pack: unable to fork git-pack-objects");
320
321 pipe_fd = xfdopen(pack_objects.in, "w");
322
323 if (pack_data->shallow_nr)
324 for_each_commit_graft(write_one_shallow, pipe_fd);
325
326 for (i = 0; i < pack_data->want_obj.nr; i++)
327 fprintf(pipe_fd, "%s\n",
328 oid_to_hex(&pack_data->want_obj.objects[i].item->oid));
329 fprintf(pipe_fd, "--not\n");
330 for (i = 0; i < pack_data->have_obj.nr; i++)
331 fprintf(pipe_fd, "%s\n",
332 oid_to_hex(&pack_data->have_obj.objects[i].item->oid));
333 for (i = 0; i < pack_data->extra_edge_obj.nr; i++)
334 fprintf(pipe_fd, "%s\n",
335 oid_to_hex(&pack_data->extra_edge_obj.objects[i].item->oid));
336 fprintf(pipe_fd, "\n");
337 fflush(pipe_fd);
338 fclose(pipe_fd);
339
340 /* We read from pack_objects.err to capture stderr output for
341 * progress bar, and pack_objects.out to capture the pack data.
342 */
343
344 while (1) {
345 struct pollfd pfd[2];
346 int pe, pu, pollsize, polltimeout;
347 int ret;
348
349 reset_timeout(pack_data->timeout);
350
351 pollsize = 0;
352 pe = pu = -1;
353
354 if (0 <= pack_objects.out) {
355 pfd[pollsize].fd = pack_objects.out;
356 pfd[pollsize].events = POLLIN;
357 pu = pollsize;
358 pollsize++;
359 }
360 if (0 <= pack_objects.err) {
361 pfd[pollsize].fd = pack_objects.err;
362 pfd[pollsize].events = POLLIN;
363 pe = pollsize;
364 pollsize++;
365 }
366
367 if (!pollsize)
368 break;
369
370 polltimeout = pack_data->keepalive < 0
371 ? -1
372 : 1000 * pack_data->keepalive;
373
374 ret = poll(pfd, pollsize, polltimeout);
375
376 if (ret < 0) {
377 if (errno != EINTR) {
378 error_errno("poll failed, resuming");
379 sleep(1);
380 }
381 continue;
382 }
383 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
384 /* Status ready; we ship that in the side-band
385 * or dump to the standard error.
386 */
387 sz = xread(pack_objects.err, progress,
388 sizeof(progress));
389 if (0 < sz)
390 send_client_data(2, progress, sz,
391 pack_data->use_sideband);
392 else if (sz == 0) {
393 close(pack_objects.err);
394 pack_objects.err = -1;
395 }
396 else
397 goto fail;
398 /* give priority to status messages */
399 continue;
400 }
401 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
402 int result = relay_pack_data(pack_objects.out,
403 &output_state,
404 pack_data->use_sideband,
405 !!uri_protocols);
406
407 if (result == 0) {
408 close(pack_objects.out);
409 pack_objects.out = -1;
410 } else if (result < 0) {
411 goto fail;
412 }
413 }
414
415 /*
416 * We hit the keepalive timeout without saying anything; send
417 * an empty message on the data sideband just to let the other
418 * side know we're still working on it, but don't have any data
419 * yet.
420 *
421 * If we don't have a sideband channel, there's no room in the
422 * protocol to say anything, so those clients are just out of
423 * luck.
424 */
425 if (!ret && pack_data->use_sideband) {
426 static const char buf[] = "0005\1";
427 write_or_die(1, buf, 5);
428 }
429 }
430
431 if (finish_command(&pack_objects)) {
432 error("git upload-pack: git-pack-objects died with error.");
433 goto fail;
434 }
435
436 /* flush the data */
437 if (output_state.used > 0) {
438 send_client_data(1, output_state.buffer, output_state.used,
439 pack_data->use_sideband);
440 fprintf(stderr, "flushed.\n");
441 }
442 if (pack_data->use_sideband)
443 packet_flush(1);
444 return;
445
446 fail:
447 send_client_data(3, abort_msg, sizeof(abort_msg),
448 pack_data->use_sideband);
449 die("git upload-pack: %s", abort_msg);
450 }
451
452 static int do_got_oid(struct upload_pack_data *data, const struct object_id *oid)
453 {
454 int we_knew_they_have = 0;
455 struct object *o = parse_object(the_repository, oid);
456
457 if (!o)
458 die("oops (%s)", oid_to_hex(oid));
459 if (o->type == OBJ_COMMIT) {
460 struct commit_list *parents;
461 struct commit *commit = (struct commit *)o;
462 if (o->flags & THEY_HAVE)
463 we_knew_they_have = 1;
464 else
465 o->flags |= THEY_HAVE;
466 if (!data->oldest_have || (commit->date < data->oldest_have))
467 data->oldest_have = commit->date;
468 for (parents = commit->parents;
469 parents;
470 parents = parents->next)
471 parents->item->object.flags |= THEY_HAVE;
472 }
473 if (!we_knew_they_have) {
474 add_object_array(o, NULL, &data->have_obj);
475 return 1;
476 }
477 return 0;
478 }
479
480 static int got_oid(struct upload_pack_data *data,
481 const char *hex, struct object_id *oid)
482 {
483 if (get_oid_hex(hex, oid))
484 die("git upload-pack: expected SHA1 object, got '%s'", hex);
485 if (!has_object_file(oid))
486 return -1;
487 return do_got_oid(data, oid);
488 }
489
490 static int ok_to_give_up(struct upload_pack_data *data)
491 {
492 uint32_t min_generation = GENERATION_NUMBER_ZERO;
493
494 if (!data->have_obj.nr)
495 return 0;
496
497 return can_all_from_reach_with_flag(&data->want_obj, THEY_HAVE,
498 COMMON_KNOWN, data->oldest_have,
499 min_generation);
500 }
501
502 static int get_common_commits(struct upload_pack_data *data,
503 struct packet_reader *reader)
504 {
505 struct object_id oid;
506 char last_hex[GIT_MAX_HEXSZ + 1];
507 int got_common = 0;
508 int got_other = 0;
509 int sent_ready = 0;
510
511 save_commit_buffer = 0;
512
513 for (;;) {
514 const char *arg;
515
516 reset_timeout(data->timeout);
517
518 if (packet_reader_read(reader) != PACKET_READ_NORMAL) {
519 if (data->multi_ack == MULTI_ACK_DETAILED
520 && got_common
521 && !got_other
522 && ok_to_give_up(data)) {
523 sent_ready = 1;
524 packet_write_fmt(1, "ACK %s ready\n", last_hex);
525 }
526 if (data->have_obj.nr == 0 || data->multi_ack)
527 packet_write_fmt(1, "NAK\n");
528
529 if (data->no_done && sent_ready) {
530 packet_write_fmt(1, "ACK %s\n", last_hex);
531 return 0;
532 }
533 if (data->stateless_rpc)
534 exit(0);
535 got_common = 0;
536 got_other = 0;
537 continue;
538 }
539 if (skip_prefix(reader->line, "have ", &arg)) {
540 switch (got_oid(data, arg, &oid)) {
541 case -1: /* they have what we do not */
542 got_other = 1;
543 if (data->multi_ack
544 && ok_to_give_up(data)) {
545 const char *hex = oid_to_hex(&oid);
546 if (data->multi_ack == MULTI_ACK_DETAILED) {
547 sent_ready = 1;
548 packet_write_fmt(1, "ACK %s ready\n", hex);
549 } else
550 packet_write_fmt(1, "ACK %s continue\n", hex);
551 }
552 break;
553 default:
554 got_common = 1;
555 oid_to_hex_r(last_hex, &oid);
556 if (data->multi_ack == MULTI_ACK_DETAILED)
557 packet_write_fmt(1, "ACK %s common\n", last_hex);
558 else if (data->multi_ack)
559 packet_write_fmt(1, "ACK %s continue\n", last_hex);
560 else if (data->have_obj.nr == 1)
561 packet_write_fmt(1, "ACK %s\n", last_hex);
562 break;
563 }
564 continue;
565 }
566 if (!strcmp(reader->line, "done")) {
567 if (data->have_obj.nr > 0) {
568 if (data->multi_ack)
569 packet_write_fmt(1, "ACK %s\n", last_hex);
570 return 0;
571 }
572 packet_write_fmt(1, "NAK\n");
573 return -1;
574 }
575 die("git upload-pack: expected SHA1 list, got '%s'", reader->line);
576 }
577 }
578
579 static int is_our_ref(struct object *o, enum allow_uor allow_uor)
580 {
581 int allow_hidden_ref = (allow_uor &
582 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
583 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
584 }
585
586 /*
587 * on successful case, it's up to the caller to close cmd->out
588 */
589 static int do_reachable_revlist(struct child_process *cmd,
590 struct object_array *src,
591 struct object_array *reachable,
592 enum allow_uor allow_uor)
593 {
594 static const char *argv[] = {
595 "rev-list", "--stdin", NULL,
596 };
597 struct object *o;
598 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
599 int i;
600 const unsigned hexsz = the_hash_algo->hexsz;
601
602 cmd->argv = argv;
603 cmd->git_cmd = 1;
604 cmd->no_stderr = 1;
605 cmd->in = -1;
606 cmd->out = -1;
607
608 /*
609 * If the next rev-list --stdin encounters an unknown commit,
610 * it terminates, which will cause SIGPIPE in the write loop
611 * below.
612 */
613 sigchain_push(SIGPIPE, SIG_IGN);
614
615 if (start_command(cmd))
616 goto error;
617
618 namebuf[0] = '^';
619 namebuf[hexsz + 1] = '\n';
620 for (i = get_max_object_index(); 0 < i; ) {
621 o = get_indexed_object(--i);
622 if (!o)
623 continue;
624 if (reachable && o->type == OBJ_COMMIT)
625 o->flags &= ~TMP_MARK;
626 if (!is_our_ref(o, allow_uor))
627 continue;
628 memcpy(namebuf + 1, oid_to_hex(&o->oid), hexsz);
629 if (write_in_full(cmd->in, namebuf, hexsz + 2) < 0)
630 goto error;
631 }
632 namebuf[hexsz] = '\n';
633 for (i = 0; i < src->nr; i++) {
634 o = src->objects[i].item;
635 if (is_our_ref(o, allow_uor)) {
636 if (reachable)
637 add_object_array(o, NULL, reachable);
638 continue;
639 }
640 if (reachable && o->type == OBJ_COMMIT)
641 o->flags |= TMP_MARK;
642 memcpy(namebuf, oid_to_hex(&o->oid), hexsz);
643 if (write_in_full(cmd->in, namebuf, hexsz + 1) < 0)
644 goto error;
645 }
646 close(cmd->in);
647 cmd->in = -1;
648 sigchain_pop(SIGPIPE);
649
650 return 0;
651
652 error:
653 sigchain_pop(SIGPIPE);
654
655 if (cmd->in >= 0)
656 close(cmd->in);
657 if (cmd->out >= 0)
658 close(cmd->out);
659 return -1;
660 }
661
662 static int get_reachable_list(struct upload_pack_data *data,
663 struct object_array *reachable)
664 {
665 struct child_process cmd = CHILD_PROCESS_INIT;
666 int i;
667 struct object *o;
668 char namebuf[GIT_MAX_HEXSZ + 2]; /* ^ + hash + LF */
669 const unsigned hexsz = the_hash_algo->hexsz;
670
671 if (do_reachable_revlist(&cmd, &data->shallows, reachable,
672 data->allow_uor) < 0)
673 return -1;
674
675 while ((i = read_in_full(cmd.out, namebuf, hexsz + 1)) == hexsz + 1) {
676 struct object_id oid;
677 const char *p;
678
679 if (parse_oid_hex(namebuf, &oid, &p) || *p != '\n')
680 break;
681
682 o = lookup_object(the_repository, &oid);
683 if (o && o->type == OBJ_COMMIT) {
684 o->flags &= ~TMP_MARK;
685 }
686 }
687 for (i = get_max_object_index(); 0 < i; i--) {
688 o = get_indexed_object(i - 1);
689 if (o && o->type == OBJ_COMMIT &&
690 (o->flags & TMP_MARK)) {
691 add_object_array(o, NULL, reachable);
692 o->flags &= ~TMP_MARK;
693 }
694 }
695 close(cmd.out);
696
697 if (finish_command(&cmd))
698 return -1;
699
700 return 0;
701 }
702
703 static int has_unreachable(struct object_array *src, enum allow_uor allow_uor)
704 {
705 struct child_process cmd = CHILD_PROCESS_INIT;
706 char buf[1];
707 int i;
708
709 if (do_reachable_revlist(&cmd, src, NULL, allow_uor) < 0)
710 return 1;
711
712 /*
713 * The commits out of the rev-list are not ancestors of
714 * our ref.
715 */
716 i = read_in_full(cmd.out, buf, 1);
717 if (i)
718 goto error;
719 close(cmd.out);
720 cmd.out = -1;
721
722 /*
723 * rev-list may have died by encountering a bad commit
724 * in the history, in which case we do want to bail out
725 * even when it showed no commit.
726 */
727 if (finish_command(&cmd))
728 goto error;
729
730 /* All the non-tip ones are ancestors of what we advertised */
731 return 0;
732
733 error:
734 if (cmd.out >= 0)
735 close(cmd.out);
736 return 1;
737 }
738
739 static void check_non_tip(struct upload_pack_data *data)
740 {
741 int i;
742
743 /*
744 * In the normal in-process case without
745 * uploadpack.allowReachableSHA1InWant,
746 * non-tip requests can never happen.
747 */
748 if (!data->stateless_rpc && !(data->allow_uor & ALLOW_REACHABLE_SHA1))
749 goto error;
750 if (!has_unreachable(&data->want_obj, data->allow_uor))
751 /* All the non-tip ones are ancestors of what we advertised */
752 return;
753
754 error:
755 /* Pick one of them (we know there at least is one) */
756 for (i = 0; i < data->want_obj.nr; i++) {
757 struct object *o = data->want_obj.objects[i].item;
758 if (!is_our_ref(o, data->allow_uor)) {
759 packet_writer_error(&data->writer,
760 "upload-pack: not our ref %s",
761 oid_to_hex(&o->oid));
762 die("git upload-pack: not our ref %s",
763 oid_to_hex(&o->oid));
764 }
765 }
766 }
767
768 static void send_shallow(struct upload_pack_data *data,
769 struct commit_list *result)
770 {
771 while (result) {
772 struct object *object = &result->item->object;
773 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
774 packet_writer_write(&data->writer, "shallow %s",
775 oid_to_hex(&object->oid));
776 register_shallow(the_repository, &object->oid);
777 data->shallow_nr++;
778 }
779 result = result->next;
780 }
781 }
782
783 static void send_unshallow(struct upload_pack_data *data)
784 {
785 int i;
786
787 for (i = 0; i < data->shallows.nr; i++) {
788 struct object *object = data->shallows.objects[i].item;
789 if (object->flags & NOT_SHALLOW) {
790 struct commit_list *parents;
791 packet_writer_write(&data->writer, "unshallow %s",
792 oid_to_hex(&object->oid));
793 object->flags &= ~CLIENT_SHALLOW;
794 /*
795 * We want to _register_ "object" as shallow, but we
796 * also need to traverse object's parents to deepen a
797 * shallow clone. Unregister it for now so we can
798 * parse and add the parents to the want list, then
799 * re-register it.
800 */
801 unregister_shallow(&object->oid);
802 object->parsed = 0;
803 parse_commit_or_die((struct commit *)object);
804 parents = ((struct commit *)object)->parents;
805 while (parents) {
806 add_object_array(&parents->item->object,
807 NULL, &data->want_obj);
808 parents = parents->next;
809 }
810 add_object_array(object, NULL, &data->extra_edge_obj);
811 }
812 /* make sure commit traversal conforms to client */
813 register_shallow(the_repository, &object->oid);
814 }
815 }
816
817 static int check_ref(const char *refname_full, const struct object_id *oid,
818 int flag, void *cb_data);
819 static void deepen(struct upload_pack_data *data, int depth)
820 {
821 if (depth == INFINITE_DEPTH && !is_repository_shallow(the_repository)) {
822 int i;
823
824 for (i = 0; i < data->shallows.nr; i++) {
825 struct object *object = data->shallows.objects[i].item;
826 object->flags |= NOT_SHALLOW;
827 }
828 } else if (data->deepen_relative) {
829 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
830 struct commit_list *result;
831
832 /*
833 * Checking for reachable shallows requires that our refs be
834 * marked with OUR_REF.
835 */
836 head_ref_namespaced(check_ref, NULL);
837 for_each_namespaced_ref(check_ref, NULL);
838
839 get_reachable_list(data, &reachable_shallows);
840 result = get_shallow_commits(&reachable_shallows,
841 depth + 1,
842 SHALLOW, NOT_SHALLOW);
843 send_shallow(data, result);
844 free_commit_list(result);
845 object_array_clear(&reachable_shallows);
846 } else {
847 struct commit_list *result;
848
849 result = get_shallow_commits(&data->want_obj, depth,
850 SHALLOW, NOT_SHALLOW);
851 send_shallow(data, result);
852 free_commit_list(result);
853 }
854
855 send_unshallow(data);
856 }
857
858 static void deepen_by_rev_list(struct upload_pack_data *data,
859 int ac,
860 const char **av)
861 {
862 struct commit_list *result;
863
864 disable_commit_graph(the_repository);
865 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
866 send_shallow(data, result);
867 free_commit_list(result);
868 send_unshallow(data);
869 }
870
871 /* Returns 1 if a shallow list is sent or 0 otherwise */
872 static int send_shallow_list(struct upload_pack_data *data)
873 {
874 int ret = 0;
875
876 if (data->depth > 0 && data->deepen_rev_list)
877 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
878 if (data->depth > 0) {
879 deepen(data, data->depth);
880 ret = 1;
881 } else if (data->deepen_rev_list) {
882 struct argv_array av = ARGV_ARRAY_INIT;
883 int i;
884
885 argv_array_push(&av, "rev-list");
886 if (data->deepen_since)
887 argv_array_pushf(&av, "--max-age=%"PRItime, data->deepen_since);
888 if (data->deepen_not.nr) {
889 argv_array_push(&av, "--not");
890 for (i = 0; i < data->deepen_not.nr; i++) {
891 struct string_list_item *s = data->deepen_not.items + i;
892 argv_array_push(&av, s->string);
893 }
894 argv_array_push(&av, "--not");
895 }
896 for (i = 0; i < data->want_obj.nr; i++) {
897 struct object *o = data->want_obj.objects[i].item;
898 argv_array_push(&av, oid_to_hex(&o->oid));
899 }
900 deepen_by_rev_list(data, av.argc, av.argv);
901 argv_array_clear(&av);
902 ret = 1;
903 } else {
904 if (data->shallows.nr > 0) {
905 int i;
906 for (i = 0; i < data->shallows.nr; i++)
907 register_shallow(the_repository,
908 &data->shallows.objects[i].item->oid);
909 }
910 }
911
912 data->shallow_nr += data->shallows.nr;
913 return ret;
914 }
915
916 static int process_shallow(const char *line, struct object_array *shallows)
917 {
918 const char *arg;
919 if (skip_prefix(line, "shallow ", &arg)) {
920 struct object_id oid;
921 struct object *object;
922 if (get_oid_hex(arg, &oid))
923 die("invalid shallow line: %s", line);
924 object = parse_object(the_repository, &oid);
925 if (!object)
926 return 1;
927 if (object->type != OBJ_COMMIT)
928 die("invalid shallow object %s", oid_to_hex(&oid));
929 if (!(object->flags & CLIENT_SHALLOW)) {
930 object->flags |= CLIENT_SHALLOW;
931 add_object_array(object, NULL, shallows);
932 }
933 return 1;
934 }
935
936 return 0;
937 }
938
939 static int process_deepen(const char *line, int *depth)
940 {
941 const char *arg;
942 if (skip_prefix(line, "deepen ", &arg)) {
943 char *end = NULL;
944 *depth = (int)strtol(arg, &end, 0);
945 if (!end || *end || *depth <= 0)
946 die("Invalid deepen: %s", line);
947 return 1;
948 }
949
950 return 0;
951 }
952
953 static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
954 {
955 const char *arg;
956 if (skip_prefix(line, "deepen-since ", &arg)) {
957 char *end = NULL;
958 *deepen_since = parse_timestamp(arg, &end, 0);
959 if (!end || *end || !deepen_since ||
960 /* revisions.c's max_age -1 is special */
961 *deepen_since == -1)
962 die("Invalid deepen-since: %s", line);
963 *deepen_rev_list = 1;
964 return 1;
965 }
966 return 0;
967 }
968
969 static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
970 {
971 const char *arg;
972 if (skip_prefix(line, "deepen-not ", &arg)) {
973 char *ref = NULL;
974 struct object_id oid;
975 if (expand_ref(the_repository, arg, strlen(arg), &oid, &ref) != 1)
976 die("git upload-pack: ambiguous deepen-not: %s", line);
977 string_list_append(deepen_not, ref);
978 free(ref);
979 *deepen_rev_list = 1;
980 return 1;
981 }
982 return 0;
983 }
984
985 static void receive_needs(struct upload_pack_data *data,
986 struct packet_reader *reader)
987 {
988 int has_non_tip = 0;
989
990 data->shallow_nr = 0;
991 for (;;) {
992 struct object *o;
993 const char *features;
994 struct object_id oid_buf;
995 const char *arg;
996
997 reset_timeout(data->timeout);
998 if (packet_reader_read(reader) != PACKET_READ_NORMAL)
999 break;
1000
1001 if (process_shallow(reader->line, &data->shallows))
1002 continue;
1003 if (process_deepen(reader->line, &data->depth))
1004 continue;
1005 if (process_deepen_since(reader->line, &data->deepen_since, &data->deepen_rev_list))
1006 continue;
1007 if (process_deepen_not(reader->line, &data->deepen_not, &data->deepen_rev_list))
1008 continue;
1009
1010 if (skip_prefix(reader->line, "filter ", &arg)) {
1011 if (!data->filter_capability_requested)
1012 die("git upload-pack: filtering capability not negotiated");
1013 list_objects_filter_die_if_populated(&data->filter_options);
1014 parse_list_objects_filter(&data->filter_options, arg);
1015 continue;
1016 }
1017
1018 if (!skip_prefix(reader->line, "want ", &arg) ||
1019 parse_oid_hex(arg, &oid_buf, &features))
1020 die("git upload-pack: protocol error, "
1021 "expected to get object ID, not '%s'", reader->line);
1022
1023 if (parse_feature_request(features, "deepen-relative"))
1024 data->deepen_relative = 1;
1025 if (parse_feature_request(features, "multi_ack_detailed"))
1026 data->multi_ack = MULTI_ACK_DETAILED;
1027 else if (parse_feature_request(features, "multi_ack"))
1028 data->multi_ack = MULTI_ACK;
1029 if (parse_feature_request(features, "no-done"))
1030 data->no_done = 1;
1031 if (parse_feature_request(features, "thin-pack"))
1032 data->use_thin_pack = 1;
1033 if (parse_feature_request(features, "ofs-delta"))
1034 data->use_ofs_delta = 1;
1035 if (parse_feature_request(features, "side-band-64k"))
1036 data->use_sideband = LARGE_PACKET_MAX;
1037 else if (parse_feature_request(features, "side-band"))
1038 data->use_sideband = DEFAULT_PACKET_MAX;
1039 if (parse_feature_request(features, "no-progress"))
1040 data->no_progress = 1;
1041 if (parse_feature_request(features, "include-tag"))
1042 data->use_include_tag = 1;
1043 if (data->allow_filter &&
1044 parse_feature_request(features, "filter"))
1045 data->filter_capability_requested = 1;
1046
1047 o = parse_object(the_repository, &oid_buf);
1048 if (!o) {
1049 packet_writer_error(&data->writer,
1050 "upload-pack: not our ref %s",
1051 oid_to_hex(&oid_buf));
1052 die("git upload-pack: not our ref %s",
1053 oid_to_hex(&oid_buf));
1054 }
1055 if (!(o->flags & WANTED)) {
1056 o->flags |= WANTED;
1057 if (!((data->allow_uor & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
1058 || is_our_ref(o, data->allow_uor)))
1059 has_non_tip = 1;
1060 add_object_array(o, NULL, &data->want_obj);
1061 }
1062 }
1063
1064 /*
1065 * We have sent all our refs already, and the other end
1066 * should have chosen out of them. When we are operating
1067 * in the stateless RPC mode, however, their choice may
1068 * have been based on the set of older refs advertised
1069 * by another process that handled the initial request.
1070 */
1071 if (has_non_tip)
1072 check_non_tip(data);
1073
1074 if (!data->use_sideband && data->daemon_mode)
1075 data->no_progress = 1;
1076
1077 if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
1078 return;
1079
1080 if (send_shallow_list(data))
1081 packet_flush(1);
1082 }
1083
1084 /* return non-zero if the ref is hidden, otherwise 0 */
1085 static int mark_our_ref(const char *refname, const char *refname_full,
1086 const struct object_id *oid)
1087 {
1088 struct object *o = lookup_unknown_object(oid);
1089
1090 if (ref_is_hidden(refname, refname_full)) {
1091 o->flags |= HIDDEN_REF;
1092 return 1;
1093 }
1094 o->flags |= OUR_REF;
1095 return 0;
1096 }
1097
1098 static int check_ref(const char *refname_full, const struct object_id *oid,
1099 int flag, void *cb_data)
1100 {
1101 const char *refname = strip_namespace(refname_full);
1102
1103 mark_our_ref(refname, refname_full, oid);
1104 return 0;
1105 }
1106
1107 static void format_symref_info(struct strbuf *buf, struct string_list *symref)
1108 {
1109 struct string_list_item *item;
1110
1111 if (!symref->nr)
1112 return;
1113 for_each_string_list_item(item, symref)
1114 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
1115 }
1116
1117 static int send_ref(const char *refname, const struct object_id *oid,
1118 int flag, void *cb_data)
1119 {
1120 static const char *capabilities = "multi_ack thin-pack side-band"
1121 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1122 " deepen-relative no-progress include-tag multi_ack_detailed";
1123 const char *refname_nons = strip_namespace(refname);
1124 struct object_id peeled;
1125 struct upload_pack_data *data = cb_data;
1126
1127 if (mark_our_ref(refname_nons, refname, oid))
1128 return 0;
1129
1130 if (capabilities) {
1131 struct strbuf symref_info = STRBUF_INIT;
1132
1133 format_symref_info(&symref_info, &data->symref);
1134 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s object-format=%s agent=%s\n",
1135 oid_to_hex(oid), refname_nons,
1136 0, capabilities,
1137 (data->allow_uor & ALLOW_TIP_SHA1) ?
1138 " allow-tip-sha1-in-want" : "",
1139 (data->allow_uor & ALLOW_REACHABLE_SHA1) ?
1140 " allow-reachable-sha1-in-want" : "",
1141 data->stateless_rpc ? " no-done" : "",
1142 symref_info.buf,
1143 data->allow_filter ? " filter" : "",
1144 the_hash_algo->name,
1145 git_user_agent_sanitized());
1146 strbuf_release(&symref_info);
1147 } else {
1148 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
1149 }
1150 capabilities = NULL;
1151 if (!peel_ref(refname, &peeled))
1152 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
1153 return 0;
1154 }
1155
1156 static int find_symref(const char *refname, const struct object_id *oid,
1157 int flag, void *cb_data)
1158 {
1159 const char *symref_target;
1160 struct string_list_item *item;
1161
1162 if ((flag & REF_ISSYMREF) == 0)
1163 return 0;
1164 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
1165 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1166 die("'%s' is a symref but it is not?", refname);
1167 item = string_list_append(cb_data, strip_namespace(refname));
1168 item->util = xstrdup(strip_namespace(symref_target));
1169 return 0;
1170 }
1171
1172 static int upload_pack_config(const char *var, const char *value, void *cb_data)
1173 {
1174 struct upload_pack_data *data = cb_data;
1175
1176 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1177 if (git_config_bool(var, value))
1178 data->allow_uor |= ALLOW_TIP_SHA1;
1179 else
1180 data->allow_uor &= ~ALLOW_TIP_SHA1;
1181 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1182 if (git_config_bool(var, value))
1183 data->allow_uor |= ALLOW_REACHABLE_SHA1;
1184 else
1185 data->allow_uor &= ~ALLOW_REACHABLE_SHA1;
1186 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1187 if (git_config_bool(var, value))
1188 data->allow_uor |= ALLOW_ANY_SHA1;
1189 else
1190 data->allow_uor &= ~ALLOW_ANY_SHA1;
1191 } else if (!strcmp("uploadpack.keepalive", var)) {
1192 data->keepalive = git_config_int(var, value);
1193 if (!data->keepalive)
1194 data->keepalive = -1;
1195 } else if (!strcmp("uploadpack.allowfilter", var)) {
1196 data->allow_filter = git_config_bool(var, value);
1197 } else if (!strcmp("uploadpack.allowrefinwant", var)) {
1198 data->allow_ref_in_want = git_config_bool(var, value);
1199 } else if (!strcmp("uploadpack.allowsidebandall", var)) {
1200 data->allow_sideband_all = git_config_bool(var, value);
1201 } else if (!strcmp("core.precomposeunicode", var)) {
1202 precomposed_unicode = git_config_bool(var, value);
1203 }
1204
1205 if (current_config_scope() != CONFIG_SCOPE_LOCAL &&
1206 current_config_scope() != CONFIG_SCOPE_WORKTREE) {
1207 if (!strcmp("uploadpack.packobjectshook", var))
1208 return git_config_string(&data->pack_objects_hook, var, value);
1209 }
1210
1211 return parse_hide_refs_config(var, value, "uploadpack");
1212 }
1213
1214 void upload_pack(struct upload_pack_options *options)
1215 {
1216 struct packet_reader reader;
1217 struct upload_pack_data data;
1218
1219 upload_pack_data_init(&data);
1220
1221 git_config(upload_pack_config, &data);
1222
1223 data.stateless_rpc = options->stateless_rpc;
1224 data.daemon_mode = options->daemon_mode;
1225 data.timeout = options->timeout;
1226
1227 head_ref_namespaced(find_symref, &data.symref);
1228
1229 if (options->advertise_refs || !data.stateless_rpc) {
1230 reset_timeout(data.timeout);
1231 head_ref_namespaced(send_ref, &data);
1232 for_each_namespaced_ref(send_ref, &data);
1233 advertise_shallow_grafts(1);
1234 packet_flush(1);
1235 } else {
1236 head_ref_namespaced(check_ref, NULL);
1237 for_each_namespaced_ref(check_ref, NULL);
1238 }
1239
1240 if (!options->advertise_refs) {
1241 packet_reader_init(&reader, 0, NULL, 0,
1242 PACKET_READ_CHOMP_NEWLINE |
1243 PACKET_READ_DIE_ON_ERR_PACKET);
1244
1245 receive_needs(&data, &reader);
1246 if (data.want_obj.nr) {
1247 get_common_commits(&data, &reader);
1248 create_pack_file(&data, NULL);
1249 }
1250 }
1251
1252 upload_pack_data_clear(&data);
1253 }
1254
1255 static int parse_want(struct packet_writer *writer, const char *line,
1256 struct object_array *want_obj)
1257 {
1258 const char *arg;
1259 if (skip_prefix(line, "want ", &arg)) {
1260 struct object_id oid;
1261 struct object *o;
1262
1263 if (get_oid_hex(arg, &oid))
1264 die("git upload-pack: protocol error, "
1265 "expected to get oid, not '%s'", line);
1266
1267 o = parse_object(the_repository, &oid);
1268 if (!o) {
1269 packet_writer_error(writer,
1270 "upload-pack: not our ref %s",
1271 oid_to_hex(&oid));
1272 die("git upload-pack: not our ref %s",
1273 oid_to_hex(&oid));
1274 }
1275
1276 if (!(o->flags & WANTED)) {
1277 o->flags |= WANTED;
1278 add_object_array(o, NULL, want_obj);
1279 }
1280
1281 return 1;
1282 }
1283
1284 return 0;
1285 }
1286
1287 static int parse_want_ref(struct packet_writer *writer, const char *line,
1288 struct string_list *wanted_refs,
1289 struct object_array *want_obj)
1290 {
1291 const char *arg;
1292 if (skip_prefix(line, "want-ref ", &arg)) {
1293 struct object_id oid;
1294 struct string_list_item *item;
1295 struct object *o;
1296
1297 if (read_ref(arg, &oid)) {
1298 packet_writer_error(writer, "unknown ref %s", arg);
1299 die("unknown ref %s", arg);
1300 }
1301
1302 item = string_list_append(wanted_refs, arg);
1303 item->util = oiddup(&oid);
1304
1305 o = parse_object_or_die(&oid, arg);
1306 if (!(o->flags & WANTED)) {
1307 o->flags |= WANTED;
1308 add_object_array(o, NULL, want_obj);
1309 }
1310
1311 return 1;
1312 }
1313
1314 return 0;
1315 }
1316
1317 static int parse_have(const char *line, struct oid_array *haves)
1318 {
1319 const char *arg;
1320 if (skip_prefix(line, "have ", &arg)) {
1321 struct object_id oid;
1322
1323 if (get_oid_hex(arg, &oid))
1324 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1325 oid_array_append(haves, &oid);
1326 return 1;
1327 }
1328
1329 return 0;
1330 }
1331
1332 static void process_args(struct packet_reader *request,
1333 struct upload_pack_data *data)
1334 {
1335 while (packet_reader_read(request) == PACKET_READ_NORMAL) {
1336 const char *arg = request->line;
1337 const char *p;
1338
1339 /* process want */
1340 if (parse_want(&data->writer, arg, &data->want_obj))
1341 continue;
1342 if (data->allow_ref_in_want &&
1343 parse_want_ref(&data->writer, arg, &data->wanted_refs,
1344 &data->want_obj))
1345 continue;
1346 /* process have line */
1347 if (parse_have(arg, &data->haves))
1348 continue;
1349
1350 /* process args like thin-pack */
1351 if (!strcmp(arg, "thin-pack")) {
1352 data->use_thin_pack = 1;
1353 continue;
1354 }
1355 if (!strcmp(arg, "ofs-delta")) {
1356 data->use_ofs_delta = 1;
1357 continue;
1358 }
1359 if (!strcmp(arg, "no-progress")) {
1360 data->no_progress = 1;
1361 continue;
1362 }
1363 if (!strcmp(arg, "include-tag")) {
1364 data->use_include_tag = 1;
1365 continue;
1366 }
1367 if (!strcmp(arg, "done")) {
1368 data->done = 1;
1369 continue;
1370 }
1371
1372 /* Shallow related arguments */
1373 if (process_shallow(arg, &data->shallows))
1374 continue;
1375 if (process_deepen(arg, &data->depth))
1376 continue;
1377 if (process_deepen_since(arg, &data->deepen_since,
1378 &data->deepen_rev_list))
1379 continue;
1380 if (process_deepen_not(arg, &data->deepen_not,
1381 &data->deepen_rev_list))
1382 continue;
1383 if (!strcmp(arg, "deepen-relative")) {
1384 data->deepen_relative = 1;
1385 continue;
1386 }
1387
1388 if (data->allow_filter && skip_prefix(arg, "filter ", &p)) {
1389 list_objects_filter_die_if_populated(&data->filter_options);
1390 parse_list_objects_filter(&data->filter_options, p);
1391 continue;
1392 }
1393
1394 if ((git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1395 data->allow_sideband_all) &&
1396 !strcmp(arg, "sideband-all")) {
1397 data->writer.use_sideband = 1;
1398 continue;
1399 }
1400
1401 if (skip_prefix(arg, "packfile-uris ", &p)) {
1402 string_list_split(&data->uri_protocols, p, ',', -1);
1403 continue;
1404 }
1405
1406 /* ignore unknown lines maybe? */
1407 die("unexpected line: '%s'", arg);
1408 }
1409
1410 if (data->uri_protocols.nr && !data->writer.use_sideband)
1411 string_list_clear(&data->uri_protocols, 0);
1412
1413 if (request->status != PACKET_READ_FLUSH)
1414 die(_("expected flush after fetch arguments"));
1415 }
1416
1417 static int process_haves(struct upload_pack_data *data, struct oid_array *common)
1418 {
1419 int i;
1420
1421 /* Process haves */
1422 for (i = 0; i < data->haves.nr; i++) {
1423 const struct object_id *oid = &data->haves.oid[i];
1424
1425 if (!has_object_file(oid))
1426 continue;
1427
1428 oid_array_append(common, oid);
1429
1430 do_got_oid(data, oid);
1431 }
1432
1433 return 0;
1434 }
1435
1436 static int send_acks(struct upload_pack_data *data, struct oid_array *acks)
1437 {
1438 int i;
1439
1440 packet_writer_write(&data->writer, "acknowledgments\n");
1441
1442 /* Send Acks */
1443 if (!acks->nr)
1444 packet_writer_write(&data->writer, "NAK\n");
1445
1446 for (i = 0; i < acks->nr; i++) {
1447 packet_writer_write(&data->writer, "ACK %s\n",
1448 oid_to_hex(&acks->oid[i]));
1449 }
1450
1451 if (ok_to_give_up(data)) {
1452 /* Send Ready */
1453 packet_writer_write(&data->writer, "ready\n");
1454 return 1;
1455 }
1456
1457 return 0;
1458 }
1459
1460 static int process_haves_and_send_acks(struct upload_pack_data *data)
1461 {
1462 struct oid_array common = OID_ARRAY_INIT;
1463 int ret = 0;
1464
1465 process_haves(data, &common);
1466 if (data->done) {
1467 ret = 1;
1468 } else if (send_acks(data, &common)) {
1469 packet_writer_delim(&data->writer);
1470 ret = 1;
1471 } else {
1472 /* Add Flush */
1473 packet_writer_flush(&data->writer);
1474 ret = 0;
1475 }
1476
1477 oid_array_clear(&data->haves);
1478 oid_array_clear(&common);
1479 return ret;
1480 }
1481
1482 static void send_wanted_ref_info(struct upload_pack_data *data)
1483 {
1484 const struct string_list_item *item;
1485
1486 if (!data->wanted_refs.nr)
1487 return;
1488
1489 packet_writer_write(&data->writer, "wanted-refs\n");
1490
1491 for_each_string_list_item(item, &data->wanted_refs) {
1492 packet_writer_write(&data->writer, "%s %s\n",
1493 oid_to_hex(item->util),
1494 item->string);
1495 }
1496
1497 packet_writer_delim(&data->writer);
1498 }
1499
1500 static void send_shallow_info(struct upload_pack_data *data)
1501 {
1502 /* No shallow info needs to be sent */
1503 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1504 !is_repository_shallow(the_repository))
1505 return;
1506
1507 packet_writer_write(&data->writer, "shallow-info\n");
1508
1509 if (!send_shallow_list(data) &&
1510 is_repository_shallow(the_repository))
1511 deepen(data, INFINITE_DEPTH);
1512
1513 packet_delim(1);
1514 }
1515
1516 enum fetch_state {
1517 FETCH_PROCESS_ARGS = 0,
1518 FETCH_SEND_ACKS,
1519 FETCH_SEND_PACK,
1520 FETCH_DONE,
1521 };
1522
1523 int upload_pack_v2(struct repository *r, struct argv_array *keys,
1524 struct packet_reader *request)
1525 {
1526 enum fetch_state state = FETCH_PROCESS_ARGS;
1527 struct upload_pack_data data;
1528
1529 clear_object_flags(ALL_FLAGS);
1530
1531 upload_pack_data_init(&data);
1532 data.use_sideband = LARGE_PACKET_MAX;
1533
1534 git_config(upload_pack_config, &data);
1535
1536 while (state != FETCH_DONE) {
1537 switch (state) {
1538 case FETCH_PROCESS_ARGS:
1539 process_args(request, &data);
1540
1541 if (!data.want_obj.nr) {
1542 /*
1543 * Request didn't contain any 'want' lines,
1544 * guess they didn't want anything.
1545 */
1546 state = FETCH_DONE;
1547 } else if (data.haves.nr) {
1548 /*
1549 * Request had 'have' lines, so lets ACK them.
1550 */
1551 state = FETCH_SEND_ACKS;
1552 } else {
1553 /*
1554 * Request had 'want's but no 'have's so we can
1555 * immedietly go to construct and send a pack.
1556 */
1557 state = FETCH_SEND_PACK;
1558 }
1559 break;
1560 case FETCH_SEND_ACKS:
1561 if (process_haves_and_send_acks(&data))
1562 state = FETCH_SEND_PACK;
1563 else
1564 state = FETCH_DONE;
1565 break;
1566 case FETCH_SEND_PACK:
1567 send_wanted_ref_info(&data);
1568 send_shallow_info(&data);
1569
1570 if (data.uri_protocols.nr) {
1571 create_pack_file(&data, &data.uri_protocols);
1572 } else {
1573 packet_writer_write(&data.writer, "packfile\n");
1574 create_pack_file(&data, NULL);
1575 }
1576 state = FETCH_DONE;
1577 break;
1578 case FETCH_DONE:
1579 continue;
1580 }
1581 }
1582
1583 upload_pack_data_clear(&data);
1584 return 0;
1585 }
1586
1587 int upload_pack_advertise(struct repository *r,
1588 struct strbuf *value)
1589 {
1590 if (value) {
1591 int allow_filter_value;
1592 int allow_ref_in_want;
1593 int allow_sideband_all_value;
1594 char *str = NULL;
1595
1596 strbuf_addstr(value, "shallow");
1597
1598 if (!repo_config_get_bool(the_repository,
1599 "uploadpack.allowfilter",
1600 &allow_filter_value) &&
1601 allow_filter_value)
1602 strbuf_addstr(value, " filter");
1603
1604 if (!repo_config_get_bool(the_repository,
1605 "uploadpack.allowrefinwant",
1606 &allow_ref_in_want) &&
1607 allow_ref_in_want)
1608 strbuf_addstr(value, " ref-in-want");
1609
1610 if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 0) ||
1611 (!repo_config_get_bool(the_repository,
1612 "uploadpack.allowsidebandall",
1613 &allow_sideband_all_value) &&
1614 allow_sideband_all_value))
1615 strbuf_addstr(value, " sideband-all");
1616
1617 if (!repo_config_get_string(the_repository,
1618 "uploadpack.blobpackfileuri",
1619 &str) &&
1620 str) {
1621 strbuf_addstr(value, " packfile-uris");
1622 free(str);
1623 }
1624 }
1625
1626 return 1;
1627 }
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