run-command: add clean_on_exit_handler
[git/git.git] / upload-pack.c
CommitLineData
def88e9a
LT
1#include "cache.h"
2#include "refs.h"
3#include "pkt-line.h"
958c24b1 4#include "sideband.h"
f6b42a81
JH
5#include "tag.h"
6#include "object.h"
f0243f26 7#include "commit.h"
77cb17e9 8#include "exec_cmd.h"
9b8dc263
JS
9#include "diff.h"
10#include "revision.h"
11#include "list-objects.h"
cc41fa8d 12#include "run-command.h"
47a59185 13#include "connect.h"
051e4005 14#include "sigchain.h"
ff5effdf 15#include "version.h"
daebaa78 16#include "string-list.h"
9812f213 17#include "parse-options.h"
def88e9a 18
9812f213
AQ
19static const char * const upload_pack_usage[] = {
20 N_("git upload-pack [<options>] <dir>"),
21 NULL
22};
def88e9a 23
208acbfb 24/* Remember to update object flag allocation in object.h */
937a515a
JH
25#define THEY_HAVE (1u << 11)
26#define OUR_REF (1u << 12)
27#define WANTED (1u << 13)
28#define COMMON_KNOWN (1u << 14)
29#define REACHABLE (1u << 15)
30
f53514bc
JS
31#define SHALLOW (1u << 16)
32#define NOT_SHALLOW (1u << 17)
33#define CLIENT_SHALLOW (1u << 18)
390eb36b 34#define HIDDEN_REF (1u << 19)
f53514bc 35
3fbe2d54 36static unsigned long oldest_have;
937a515a 37
3f1da57f 38static int multi_ack;
4e10cf9a 39static int no_done;
348e390b 40static int use_thin_pack, use_ofs_delta, use_include_tag;
9462e3f5 41static int no_progress, daemon_mode;
7199c093
FM
42/* Allow specifying sha1 if it is a ref tip. */
43#define ALLOW_TIP_SHA1 01
68ee6289
FM
44/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
45#define ALLOW_REACHABLE_SHA1 02
7199c093 46static unsigned int allow_unadvertised_object_request;
f0cea83f 47static int shallow_nr;
b1e9fff7
JH
48static struct object_array have_obj;
49static struct object_array want_obj;
6523078b 50static struct object_array extra_edge_obj;
96f1e58f 51static unsigned int timeout;
115dedd7 52static int keepalive = 5;
d47f3db7
JH
53/* 0 for no sideband,
54 * otherwise maximum packet size (up to 65520 bytes).
55 */
96f1e58f 56static int use_sideband;
42526b47
SP
57static int advertise_refs;
58static int stateless_rpc;
20b20a22 59static const char *pack_objects_hook;
960deccb
PA
60
61static void reset_timeout(void)
62{
63 alarm(timeout);
64}
fb9040cc 65
fcf0fe9e 66static void send_client_data(int fd, const char *data, ssize_t sz)
583b7ea3 67{
4c4b7d1d
LF
68 if (use_sideband) {
69 send_sideband(1, fd, data, sz, use_sideband);
fcf0fe9e 70 return;
4c4b7d1d 71 }
958c24b1
JH
72 if (fd == 3)
73 /* emergency quit */
74 fd = 2;
75 if (fd == 2) {
93822c22 76 /* XXX: are we happy to lose stuff here? */
958c24b1 77 xwrite(fd, data, sz);
fcf0fe9e 78 return;
583b7ea3 79 }
cdf4fb8e 80 write_or_die(fd, data, sz);
583b7ea3
JH
81}
82
b790e0f6
NTND
83static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
84{
85 FILE *fp = cb_data;
86 if (graft->nr_parent == -1)
7683e2e6 87 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
b790e0f6
NTND
88 return 0;
89}
90
fb9040cc
LT
91static void create_pack_file(void)
92{
d3180279 93 struct child_process pack_objects = CHILD_PROCESS_INIT;
363b7817 94 char data[8193], progress[128];
583b7ea3
JH
95 char abort_msg[] = "aborting due to possible repository "
96 "corruption on the remote side.";
b1c71b72 97 int buffered = -1;
1456b043 98 ssize_t sz;
65a3629e 99 int i;
cdab4858 100 FILE *pipe_fd;
75bfc6c2 101
20b20a22
JK
102 if (!pack_objects_hook)
103 pack_objects.git_cmd = 1;
104 else {
105 argv_array_push(&pack_objects.args, pack_objects_hook);
106 argv_array_push(&pack_objects.args, "git");
107 pack_objects.use_shell = 1;
108 }
109
cdab4858 110 if (shallow_nr) {
65a3629e
MP
111 argv_array_push(&pack_objects.args, "--shallow-file");
112 argv_array_push(&pack_objects.args, "");
f0cea83f 113 }
65a3629e
MP
114 argv_array_push(&pack_objects.args, "pack-objects");
115 argv_array_push(&pack_objects.args, "--revs");
cdab4858 116 if (use_thin_pack)
65a3629e 117 argv_array_push(&pack_objects.args, "--thin");
75bfc6c2 118
65a3629e 119 argv_array_push(&pack_objects.args, "--stdout");
2dacf26d 120 if (shallow_nr)
65a3629e 121 argv_array_push(&pack_objects.args, "--shallow");
cc41fa8d 122 if (!no_progress)
65a3629e 123 argv_array_push(&pack_objects.args, "--progress");
cc41fa8d 124 if (use_ofs_delta)
65a3629e 125 argv_array_push(&pack_objects.args, "--delta-base-offset");
348e390b 126 if (use_include_tag)
65a3629e 127 argv_array_push(&pack_objects.args, "--include-tag");
cc41fa8d 128
b9612197 129 pack_objects.in = -1;
cc41fa8d
JS
130 pack_objects.out = -1;
131 pack_objects.err = -1;
21edd3f1 132
4c324c00 133 if (start_command(&pack_objects))
7e44c935 134 die("git upload-pack: unable to fork git-pack-objects");
b1c71b72 135
cdab4858
NTND
136 pipe_fd = xfdopen(pack_objects.in, "w");
137
b790e0f6
NTND
138 if (shallow_nr)
139 for_each_commit_graft(write_one_shallow, pipe_fd);
140
cdab4858
NTND
141 for (i = 0; i < want_obj.nr; i++)
142 fprintf(pipe_fd, "%s\n",
f2fd0760 143 oid_to_hex(&want_obj.objects[i].item->oid));
cdab4858
NTND
144 fprintf(pipe_fd, "--not\n");
145 for (i = 0; i < have_obj.nr; i++)
146 fprintf(pipe_fd, "%s\n",
f2fd0760 147 oid_to_hex(&have_obj.objects[i].item->oid));
cdab4858
NTND
148 for (i = 0; i < extra_edge_obj.nr; i++)
149 fprintf(pipe_fd, "%s\n",
f2fd0760 150 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
cdab4858
NTND
151 fprintf(pipe_fd, "\n");
152 fflush(pipe_fd);
153 fclose(pipe_fd);
f0cea83f 154
cc41fa8d
JS
155 /* We read from pack_objects.err to capture stderr output for
156 * progress bar, and pack_objects.out to capture the pack data.
b1c71b72 157 */
b1c71b72
JH
158
159 while (1) {
b1c71b72 160 struct pollfd pfd[2];
363b7817 161 int pe, pu, pollsize;
05e95155 162 int ret;
b1c71b72 163
0d516ada
ML
164 reset_timeout();
165
b1c71b72 166 pollsize = 0;
363b7817 167 pe = pu = -1;
b1c71b72 168
cc41fa8d
JS
169 if (0 <= pack_objects.out) {
170 pfd[pollsize].fd = pack_objects.out;
b1c71b72
JH
171 pfd[pollsize].events = POLLIN;
172 pu = pollsize;
173 pollsize++;
174 }
cc41fa8d
JS
175 if (0 <= pack_objects.err) {
176 pfd[pollsize].fd = pack_objects.err;
363b7817
JH
177 pfd[pollsize].events = POLLIN;
178 pe = pollsize;
179 pollsize++;
180 }
b1c71b72 181
4c324c00
JS
182 if (!pollsize)
183 break;
184
6c71f8b0
ET
185 ret = poll(pfd, pollsize,
186 keepalive < 0 ? -1 : 1000 * keepalive);
187
05e95155 188 if (ret < 0) {
4c324c00 189 if (errno != EINTR) {
d2b6afa2 190 error_errno("poll failed, resuming");
4c324c00 191 sleep(1);
b1c71b72 192 }
4c324c00
JS
193 continue;
194 }
6b59f51b
NP
195 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
196 /* Status ready; we ship that in the side-band
197 * or dump to the standard error.
198 */
199 sz = xread(pack_objects.err, progress,
200 sizeof(progress));
201 if (0 < sz)
202 send_client_data(2, progress, sz);
203 else if (sz == 0) {
204 close(pack_objects.err);
205 pack_objects.err = -1;
206 }
207 else
208 goto fail;
209 /* give priority to status messages */
210 continue;
211 }
4c324c00
JS
212 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
213 /* Data ready; we keep the last byte to ourselves
214 * in case we detect broken rev-list, so that we
215 * can leave the stream corrupted. This is
216 * unfortunate -- unpack-objects would happily
217 * accept a valid packdata with trailing garbage,
218 * so appending garbage after we pass all the
219 * pack data is not good enough to signal
220 * breakage to downstream.
221 */
222 char *cp = data;
223 ssize_t outsz = 0;
224 if (0 <= buffered) {
225 *cp++ = buffered;
226 outsz++;
b1c71b72 227 }
4c324c00
JS
228 sz = xread(pack_objects.out, cp,
229 sizeof(data) - outsz);
230 if (0 < sz)
1456b043 231 ;
4c324c00
JS
232 else if (sz == 0) {
233 close(pack_objects.out);
234 pack_objects.out = -1;
363b7817 235 }
4c324c00
JS
236 else
237 goto fail;
238 sz += outsz;
239 if (1 < sz) {
240 buffered = data[sz-1] & 0xFF;
241 sz--;
b1c71b72 242 }
4c324c00
JS
243 else
244 buffered = -1;
fcf0fe9e 245 send_client_data(1, data, sz);
4c324c00 246 }
05e95155
JK
247
248 /*
249 * We hit the keepalive timeout without saying anything; send
250 * an empty message on the data sideband just to let the other
251 * side know we're still working on it, but don't have any data
252 * yet.
253 *
254 * If we don't have a sideband channel, there's no room in the
255 * protocol to say anything, so those clients are just out of
256 * luck.
257 */
258 if (!ret && use_sideband) {
259 static const char buf[] = "0005\1";
260 write_or_die(1, buf, 5);
261 }
4c324c00 262 }
b1c71b72 263
4c324c00 264 if (finish_command(&pack_objects)) {
7e44c935 265 error("git upload-pack: git-pack-objects died with error.");
4c324c00
JS
266 goto fail;
267 }
b1c71b72 268
4c324c00
JS
269 /* flush the data */
270 if (0 <= buffered) {
271 data[0] = buffered;
fcf0fe9e 272 send_client_data(1, data, 1);
4c324c00 273 fprintf(stderr, "flushed.\n");
b1c71b72 274 }
4c324c00
JS
275 if (use_sideband)
276 packet_flush(1);
277 return;
278
b1c71b72 279 fail:
583b7ea3 280 send_client_data(3, abort_msg, sizeof(abort_msg));
7e44c935 281 die("git upload-pack: %s", abort_msg);
fb9040cc
LT
282}
283
def88e9a
LT
284static int got_sha1(char *hex, unsigned char *sha1)
285{
b1e9fff7 286 struct object *o;
937a515a 287 int we_knew_they_have = 0;
b1e9fff7 288
def88e9a 289 if (get_sha1_hex(hex, sha1))
7e44c935 290 die("git upload-pack: expected SHA1 object, got '%s'", hex);
fb9040cc 291 if (!has_sha1_file(sha1))
937a515a 292 return -1;
b1e9fff7 293
a6eec126 294 o = parse_object(sha1);
b1e9fff7
JH
295 if (!o)
296 die("oops (%s)", sha1_to_hex(sha1));
182a8dab 297 if (o->type == OBJ_COMMIT) {
b1e9fff7 298 struct commit_list *parents;
937a515a 299 struct commit *commit = (struct commit *)o;
b1e9fff7 300 if (o->flags & THEY_HAVE)
937a515a
JH
301 we_knew_they_have = 1;
302 else
303 o->flags |= THEY_HAVE;
304 if (!oldest_have || (commit->date < oldest_have))
305 oldest_have = commit->date;
306 for (parents = commit->parents;
b1e9fff7
JH
307 parents;
308 parents = parents->next)
309 parents->item->object.flags |= THEY_HAVE;
fb9040cc 310 }
937a515a
JH
311 if (!we_knew_they_have) {
312 add_object_array(o, NULL, &have_obj);
313 return 1;
314 }
315 return 0;
316}
317
318static int reachable(struct commit *want)
319{
320 struct commit_list *work = NULL;
321
47e44ed1 322 commit_list_insert_by_date(want, &work);
937a515a 323 while (work) {
e510ab89
RS
324 struct commit_list *list;
325 struct commit *commit = pop_commit(&work);
937a515a
JH
326
327 if (commit->object.flags & THEY_HAVE) {
328 want->object.flags |= COMMON_KNOWN;
329 break;
330 }
331 if (!commit->object.parsed)
ed1c9977 332 parse_object(commit->object.oid.hash);
937a515a
JH
333 if (commit->object.flags & REACHABLE)
334 continue;
335 commit->object.flags |= REACHABLE;
336 if (commit->date < oldest_have)
337 continue;
338 for (list = commit->parents; list; list = list->next) {
339 struct commit *parent = list->item;
340 if (!(parent->object.flags & REACHABLE))
47e44ed1 341 commit_list_insert_by_date(parent, &work);
937a515a
JH
342 }
343 }
344 want->object.flags |= REACHABLE;
345 clear_commit_marks(want, REACHABLE);
346 free_commit_list(work);
347 return (want->object.flags & COMMON_KNOWN);
348}
349
350static int ok_to_give_up(void)
351{
352 int i;
353
354 if (!have_obj.nr)
355 return 0;
356
357 for (i = 0; i < want_obj.nr; i++) {
358 struct object *want = want_obj.objects[i].item;
359
360 if (want->flags & COMMON_KNOWN)
361 continue;
362 want = deref_tag(want, "a want line", 0);
363 if (!want || want->type != OBJ_COMMIT) {
364 /* no way to tell if this is reachable by
365 * looking at the ancestry chain alone, so
366 * leave a note to ourselves not to worry about
367 * this object anymore.
368 */
369 want_obj.objects[i].item->flags |= COMMON_KNOWN;
370 continue;
371 }
372 if (!reachable((struct commit *)want))
373 return 0;
374 }
fb9040cc 375 return 1;
def88e9a
LT
376}
377
378static int get_common_commits(void)
379{
c04c4e57 380 unsigned char sha1[20];
78affc49 381 char last_hex[41];
49bee717
SP
382 int got_common = 0;
383 int got_other = 0;
4e10cf9a 384 int sent_ready = 0;
def88e9a 385
f0243f26
JS
386 save_commit_buffer = 0;
387
eeefa7c9 388 for (;;) {
74543a04 389 char *line = packet_read_line(0, NULL);
960deccb 390 reset_timeout();
def88e9a 391
74543a04 392 if (!line) {
49bee717 393 if (multi_ack == 2 && got_common
4e10cf9a
JH
394 && !got_other && ok_to_give_up()) {
395 sent_ready = 1;
49bee717 396 packet_write(1, "ACK %s ready\n", last_hex);
4e10cf9a 397 }
b1e9fff7 398 if (have_obj.nr == 0 || multi_ack)
1bd8c8f0 399 packet_write(1, "NAK\n");
4e10cf9a
JH
400
401 if (no_done && sent_ready) {
402 packet_write(1, "ACK %s\n", last_hex);
403 return 0;
404 }
42526b47
SP
405 if (stateless_rpc)
406 exit(0);
49bee717
SP
407 got_common = 0;
408 got_other = 0;
def88e9a
LT
409 continue;
410 }
59556548 411 if (starts_with(line, "have ")) {
937a515a
JH
412 switch (got_sha1(line+5, sha1)) {
413 case -1: /* they have what we do not */
49bee717 414 got_other = 1;
78affc49
SP
415 if (multi_ack && ok_to_give_up()) {
416 const char *hex = sha1_to_hex(sha1);
4e10cf9a
JH
417 if (multi_ack == 2) {
418 sent_ready = 1;
78affc49 419 packet_write(1, "ACK %s ready\n", hex);
4e10cf9a 420 } else
78affc49
SP
421 packet_write(1, "ACK %s continue\n", hex);
422 }
937a515a
JH
423 break;
424 default:
49bee717 425 got_common = 1;
78affc49
SP
426 memcpy(last_hex, sha1_to_hex(sha1), 41);
427 if (multi_ack == 2)
428 packet_write(1, "ACK %s common\n", last_hex);
429 else if (multi_ack)
430 packet_write(1, "ACK %s continue\n", last_hex);
c04c4e57 431 else if (have_obj.nr == 1)
78affc49 432 packet_write(1, "ACK %s\n", last_hex);
937a515a 433 break;
af2d3aa4 434 }
def88e9a
LT
435 continue;
436 }
437 if (!strcmp(line, "done")) {
b1e9fff7 438 if (have_obj.nr > 0) {
1bd8c8f0 439 if (multi_ack)
c04c4e57 440 packet_write(1, "ACK %s\n", last_hex);
1bd8c8f0
JS
441 return 0;
442 }
def88e9a
LT
443 packet_write(1, "NAK\n");
444 return -1;
445 }
7e44c935 446 die("git upload-pack: expected SHA1 list, got '%s'", line);
def88e9a 447 }
def88e9a
LT
448}
449
390eb36b
JH
450static int is_our_ref(struct object *o)
451{
68ee6289
FM
452 int allow_hidden_ref = (allow_unadvertised_object_request &
453 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
7199c093 454 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
390eb36b
JH
455}
456
051e4005
JH
457static void check_non_tip(void)
458{
459 static const char *argv[] = {
460 "rev-list", "--stdin", NULL,
461 };
d3180279 462 static struct child_process cmd = CHILD_PROCESS_INIT;
051e4005
JH
463 struct object *o;
464 char namebuf[42]; /* ^ + SHA-1 + LF */
465 int i;
466
68ee6289
FM
467 /*
468 * In the normal in-process case without
469 * uploadpack.allowReachableSHA1InWant,
470 * non-tip requests can never happen.
471 */
472 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
051e4005
JH
473 goto error;
474
475 cmd.argv = argv;
476 cmd.git_cmd = 1;
477 cmd.no_stderr = 1;
478 cmd.in = -1;
479 cmd.out = -1;
480
481 if (start_command(&cmd))
482 goto error;
483
484 /*
485 * If rev-list --stdin encounters an unknown commit, it
486 * terminates, which will cause SIGPIPE in the write loop
487 * below.
488 */
489 sigchain_push(SIGPIPE, SIG_IGN);
490
491 namebuf[0] = '^';
492 namebuf[41] = '\n';
493 for (i = get_max_object_index(); 0 < i; ) {
494 o = get_indexed_object(--i);
2a745324
BH
495 if (!o)
496 continue;
390eb36b 497 if (!is_our_ref(o))
051e4005 498 continue;
f2fd0760 499 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
051e4005
JH
500 if (write_in_full(cmd.in, namebuf, 42) < 0)
501 goto error;
502 }
503 namebuf[40] = '\n';
504 for (i = 0; i < want_obj.nr; i++) {
505 o = want_obj.objects[i].item;
390eb36b 506 if (is_our_ref(o))
051e4005 507 continue;
f2fd0760 508 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
051e4005
JH
509 if (write_in_full(cmd.in, namebuf, 41) < 0)
510 goto error;
511 }
512 close(cmd.in);
513
514 sigchain_pop(SIGPIPE);
515
516 /*
517 * The commits out of the rev-list are not ancestors of
518 * our ref.
519 */
520 i = read_in_full(cmd.out, namebuf, 1);
521 if (i)
522 goto error;
523 close(cmd.out);
524
525 /*
526 * rev-list may have died by encountering a bad commit
527 * in the history, in which case we do want to bail out
528 * even when it showed no commit.
529 */
530 if (finish_command(&cmd))
531 goto error;
532
533 /* All the non-tip ones are ancestors of what we advertised */
534 return;
535
536error:
537 /* Pick one of them (we know there at least is one) */
538 for (i = 0; i < want_obj.nr; i++) {
539 o = want_obj.objects[i].item;
390eb36b 540 if (!is_our_ref(o))
051e4005 541 die("git upload-pack: not our ref %s",
f2fd0760 542 oid_to_hex(&o->oid));
051e4005
JH
543 }
544}
545
b1e9fff7 546static void receive_needs(void)
fb9040cc 547{
3cd47459 548 struct object_array shallows = OBJECT_ARRAY_INIT;
74543a04 549 int depth = 0;
051e4005 550 int has_non_tip = 0;
fb9040cc 551
f0cea83f 552 shallow_nr = 0;
fb9040cc 553 for (;;) {
565ebbf7 554 struct object *o;
f47182c8 555 const char *features;
6ece0d30 556 unsigned char sha1_buf[20];
74543a04 557 char *line = packet_read_line(0, NULL);
960deccb 558 reset_timeout();
74543a04 559 if (!line)
ed09aef0 560 break;
e091eb93 561
59556548 562 if (starts_with(line, "shallow ")) {
ed09aef0
JS
563 unsigned char sha1[20];
564 struct object *object;
b7b02170 565 if (get_sha1_hex(line + 8, sha1))
ed09aef0
JS
566 die("invalid shallow line: %s", line);
567 object = parse_object(sha1);
568 if (!object)
af04fa2a 569 continue;
6293ded3
NTND
570 if (object->type != OBJ_COMMIT)
571 die("invalid shallow object %s", sha1_to_hex(sha1));
e58e57e4
JK
572 if (!(object->flags & CLIENT_SHALLOW)) {
573 object->flags |= CLIENT_SHALLOW;
574 add_object_array(object, NULL, &shallows);
575 }
ed09aef0
JS
576 continue;
577 }
59556548 578 if (starts_with(line, "deepen ")) {
016e6ccb
JS
579 char *end;
580 depth = strtol(line + 7, &end, 0);
581 if (end == line + 7 || depth <= 0)
582 die("Invalid deepen: %s", line);
583 continue;
584 }
59556548 585 if (!starts_with(line, "want ") ||
6ece0d30 586 get_sha1_hex(line+5, sha1_buf))
7e44c935 587 die("git upload-pack: protocol error, "
e091eb93 588 "expected to get sha, not '%s'", line);
f47182c8
JH
589
590 features = line + 45;
591
592 if (parse_feature_request(features, "multi_ack_detailed"))
78affc49 593 multi_ack = 2;
f47182c8 594 else if (parse_feature_request(features, "multi_ack"))
1bd8c8f0 595 multi_ack = 1;
f47182c8 596 if (parse_feature_request(features, "no-done"))
4e10cf9a 597 no_done = 1;
f47182c8 598 if (parse_feature_request(features, "thin-pack"))
b19696c2 599 use_thin_pack = 1;
f47182c8 600 if (parse_feature_request(features, "ofs-delta"))
e4fe4b8e 601 use_ofs_delta = 1;
f47182c8 602 if (parse_feature_request(features, "side-band-64k"))
d47f3db7 603 use_sideband = LARGE_PACKET_MAX;
f47182c8 604 else if (parse_feature_request(features, "side-band"))
d47f3db7 605 use_sideband = DEFAULT_PACKET_MAX;
f47182c8 606 if (parse_feature_request(features, "no-progress"))
b0e90897 607 no_progress = 1;
f47182c8 608 if (parse_feature_request(features, "include-tag"))
348e390b 609 use_include_tag = 1;
565ebbf7 610
f59de5d1 611 o = parse_object(sha1_buf);
051e4005 612 if (!o)
9f9aa761
EN
613 die("git upload-pack: not our ref %s",
614 sha1_to_hex(sha1_buf));
565ebbf7
JH
615 if (!(o->flags & WANTED)) {
616 o->flags |= WANTED;
390eb36b 617 if (!is_our_ref(o))
051e4005 618 has_non_tip = 1;
b1e9fff7 619 add_object_array(o, NULL, &want_obj);
565ebbf7 620 }
fb9040cc 621 }
9462e3f5 622
051e4005
JH
623 /*
624 * We have sent all our refs already, and the other end
625 * should have chosen out of them. When we are operating
626 * in the stateless RPC mode, however, their choice may
627 * have been based on the set of older refs advertised
628 * by another process that handled the initial request.
629 */
630 if (has_non_tip)
631 check_non_tip();
632
9462e3f5
JS
633 if (!use_sideband && daemon_mode)
634 no_progress = 1;
635
f53514bc
JS
636 if (depth == 0 && shallows.nr == 0)
637 return;
016e6ccb 638 if (depth > 0) {
4dcb167f 639 struct commit_list *result = NULL, *backup = NULL;
f53514bc 640 int i;
79d3a236 641 if (depth == INFINITE_DEPTH && !is_repository_shallow())
4dcb167f
NTND
642 for (i = 0; i < shallows.nr; i++) {
643 struct object *object = shallows.objects[i].item;
644 object->flags |= NOT_SHALLOW;
645 }
646 else
647 backup = result =
648 get_shallow_commits(&want_obj, depth,
649 SHALLOW, NOT_SHALLOW);
016e6ccb 650 while (result) {
f53514bc 651 struct object *object = &result->item->object;
1f2de769 652 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
f53514bc 653 packet_write(1, "shallow %s",
f2fd0760 654 oid_to_hex(&object->oid));
ed1c9977 655 register_shallow(object->oid.hash);
f0cea83f 656 shallow_nr++;
f53514bc 657 }
016e6ccb
JS
658 result = result->next;
659 }
660 free_commit_list(backup);
f53514bc
JS
661 for (i = 0; i < shallows.nr; i++) {
662 struct object *object = shallows.objects[i].item;
663 if (object->flags & NOT_SHALLOW) {
664 struct commit_list *parents;
665 packet_write(1, "unshallow %s",
f2fd0760 666 oid_to_hex(&object->oid));
f53514bc
JS
667 object->flags &= ~CLIENT_SHALLOW;
668 /* make sure the real parents are parsed */
ed1c9977 669 unregister_shallow(object->oid.hash);
176d45cb 670 object->parsed = 0;
367068e0 671 parse_commit_or_die((struct commit *)object);
f53514bc
JS
672 parents = ((struct commit *)object)->parents;
673 while (parents) {
674 add_object_array(&parents->item->object,
675 NULL, &want_obj);
676 parents = parents->next;
677 }
6523078b 678 add_object_array(object, NULL, &extra_edge_obj);
f53514bc
JS
679 }
680 /* make sure commit traversal conforms to client */
ed1c9977 681 register_shallow(object->oid.hash);
f53514bc
JS
682 }
683 packet_flush(1);
684 } else
685 if (shallows.nr > 0) {
686 int i;
687 for (i = 0; i < shallows.nr; i++)
ed1c9977 688 register_shallow(shallows.objects[i].item->oid.hash);
f53514bc 689 }
f0cea83f
NE
690
691 shallow_nr += shallows.nr;
f53514bc 692 free(shallows.objects);
fb9040cc
LT
693}
694
daebaa78 695/* return non-zero if the ref is hidden, otherwise 0 */
78a766ab
LF
696static int mark_our_ref(const char *refname, const char *refname_full,
697 const struct object_id *oid)
cbbe50db 698{
363e98bf 699 struct object *o = lookup_unknown_object(oid->hash);
daebaa78 700
78a766ab 701 if (ref_is_hidden(refname, refname_full)) {
390eb36b 702 o->flags |= HIDDEN_REF;
daebaa78 703 return 1;
390eb36b 704 }
3f1da57f 705 o->flags |= OUR_REF;
cbbe50db
JH
706 return 0;
707}
708
78a766ab 709static int check_ref(const char *refname_full, const struct object_id *oid,
363e98bf 710 int flag, void *cb_data)
e172755b 711{
78a766ab
LF
712 const char *refname = strip_namespace(refname_full);
713
714 mark_our_ref(refname, refname_full, oid);
e172755b
JK
715 return 0;
716}
717
7171d8c1
JH
718static void format_symref_info(struct strbuf *buf, struct string_list *symref)
719{
720 struct string_list_item *item;
721
722 if (!symref->nr)
723 return;
724 for_each_string_list_item(item, symref)
725 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
726}
727
363e98bf
MH
728static int send_ref(const char *refname, const struct object_id *oid,
729 int flag, void *cb_data)
def88e9a 730{
ed09aef0 731 static const char *capabilities = "multi_ack thin-pack side-band"
348e390b 732 " side-band-64k ofs-delta shallow no-progress"
78affc49 733 " include-tag multi_ack_detailed";
6b01ecfe 734 const char *refname_nons = strip_namespace(refname);
21758aff 735 struct object_id peeled;
b5b16990 736
78a766ab 737 if (mark_our_ref(refname_nons, refname, oid))
daebaa78 738 return 0;
cbbe50db 739
7171d8c1
JH
740 if (capabilities) {
741 struct strbuf symref_info = STRBUF_INIT;
742
743 format_symref_info(&symref_info, cb_data);
68ee6289 744 packet_write(1, "%s %s%c%s%s%s%s%s agent=%s\n",
363e98bf 745 oid_to_hex(oid), refname_nons,
cf2ad8e6 746 0, capabilities,
7199c093
FM
747 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
748 " allow-tip-sha1-in-want" : "",
68ee6289
FM
749 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
750 " allow-reachable-sha1-in-want" : "",
ff5effdf 751 stateless_rpc ? " no-done" : "",
7171d8c1 752 symref_info.buf,
ff5effdf 753 git_user_agent_sanitized());
7171d8c1
JH
754 strbuf_release(&symref_info);
755 } else {
363e98bf 756 packet_write(1, "%s %s\n", oid_to_hex(oid), refname_nons);
7171d8c1 757 }
1f5881bb 758 capabilities = NULL;
21758aff
MH
759 if (!peel_ref(refname, peeled.hash))
760 packet_write(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
def88e9a
LT
761 return 0;
762}
763
7dabd056
MH
764static int find_symref(const char *refname, const struct object_id *oid,
765 int flag, void *cb_data)
7171d8c1
JH
766{
767 const char *symref_target;
768 struct string_list_item *item;
e45a4949 769 struct object_id unused;
7171d8c1
JH
770
771 if ((flag & REF_ISSYMREF) == 0)
772 return 0;
e45a4949 773 symref_target = resolve_ref_unsafe(refname, 0, unused.hash, &flag);
7171d8c1
JH
774 if (!symref_target || (flag & REF_ISSYMREF) == 0)
775 die("'%s' is a symref but it is not?", refname);
776 item = string_list_append(cb_data, refname);
777 item->util = xstrdup(symref_target);
778 return 0;
779}
780
59076eba 781static void upload_pack(void)
def88e9a 782{
7171d8c1
JH
783 struct string_list symref = STRING_LIST_INIT_DUP;
784
785 head_ref_namespaced(find_symref, &symref);
786
42526b47
SP
787 if (advertise_refs || !stateless_rpc) {
788 reset_timeout();
7171d8c1
JH
789 head_ref_namespaced(send_ref, &symref);
790 for_each_namespaced_ref(send_ref, &symref);
ad491366 791 advertise_shallow_grafts(1);
42526b47
SP
792 packet_flush(1);
793 } else {
e172755b
JK
794 head_ref_namespaced(check_ref, NULL);
795 for_each_namespaced_ref(check_ref, NULL);
42526b47 796 }
7171d8c1 797 string_list_clear(&symref, 1);
42526b47
SP
798 if (advertise_refs)
799 return;
800
b1e9fff7 801 receive_needs();
59076eba
DR
802 if (want_obj.nr) {
803 get_common_commits();
804 create_pack_file();
805 }
def88e9a
LT
806}
807
daebaa78
JH
808static int upload_pack_config(const char *var, const char *value, void *unused)
809{
7199c093
FM
810 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
811 if (git_config_bool(var, value))
812 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
813 else
814 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
68ee6289
FM
815 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
816 if (git_config_bool(var, value))
817 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
818 else
819 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
7199c093 820 } else if (!strcmp("uploadpack.keepalive", var)) {
05e95155
JK
821 keepalive = git_config_int(var, value);
822 if (!keepalive)
823 keepalive = -1;
20b20a22
JK
824 } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
825 if (!strcmp("uploadpack.packobjectshook", var))
826 return git_config_string(&pack_objects_hook, var, value);
05e95155 827 }
daebaa78
JH
828 return parse_hide_refs_config(var, value, "uploadpack");
829}
830
3f2e2297 831int cmd_main(int argc, const char **argv)
def88e9a 832{
9812f213 833 const char *dir;
960deccb 834 int strict = 0;
9812f213
AQ
835 struct option options[] = {
836 OPT_BOOL(0, "stateless-rpc", &stateless_rpc,
837 N_("quit after a single request/response exchange")),
838 OPT_BOOL(0, "advertise-refs", &advertise_refs,
2e3a16b2 839 N_("exit immediately after initial ref advertisement")),
9812f213
AQ
840 OPT_BOOL(0, "strict", &strict,
841 N_("do not try <directory>/.git/ if <directory> is no Git directory")),
842 OPT_INTEGER(0, "timeout", &timeout,
843 N_("interrupt transfer after <n> seconds of inactivity")),
844 OPT_END()
845 };
960deccb 846
bbc30f99 847 packet_trace_identity("upload-pack");
afc711b8 848 check_replace_refs = 0;
2fb3f6db 849
9812f213 850 argc = parse_options(argc, argv, NULL, options, upload_pack_usage, 0);
960deccb 851
9812f213
AQ
852 if (argc != 1)
853 usage_with_options(upload_pack_usage, options);
a6080a0a 854
9812f213
AQ
855 if (timeout)
856 daemon_mode = 1;
04b33055 857
e1464ca7 858 setup_path();
04b33055 859
9812f213 860 dir = argv[0];
113b9475 861
8d630132 862 if (!enter_repo(dir, strict))
05ac6b34 863 die("'%s' does not appear to be a git repository", dir);
ad491366 864
daebaa78 865 git_config(upload_pack_config, NULL);
def88e9a
LT
866 upload_pack();
867 return 0;
868}