object: convert parse_object* to take struct object_id
[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"
569e554b 18#include "argv-array.h"
5411b10c 19#include "prio-queue.h"
def88e9a 20
9812f213
AQ
21static const char * const upload_pack_usage[] = {
22 N_("git upload-pack [<options>] <dir>"),
23 NULL
24};
def88e9a 25
208acbfb 26/* Remember to update object flag allocation in object.h */
937a515a
JH
27#define THEY_HAVE (1u << 11)
28#define OUR_REF (1u << 12)
29#define WANTED (1u << 13)
30#define COMMON_KNOWN (1u << 14)
31#define REACHABLE (1u << 15)
32
f53514bc
JS
33#define SHALLOW (1u << 16)
34#define NOT_SHALLOW (1u << 17)
35#define CLIENT_SHALLOW (1u << 18)
390eb36b 36#define HIDDEN_REF (1u << 19)
f53514bc 37
3fbe2d54 38static unsigned long oldest_have;
937a515a 39
cccf74e2 40static int deepen_relative;
3f1da57f 41static int multi_ack;
4e10cf9a 42static int no_done;
348e390b 43static int use_thin_pack, use_ofs_delta, use_include_tag;
9462e3f5 44static int no_progress, daemon_mode;
7199c093
FM
45/* Allow specifying sha1 if it is a ref tip. */
46#define ALLOW_TIP_SHA1 01
68ee6289
FM
47/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
48#define ALLOW_REACHABLE_SHA1 02
f8edeaa0
DT
49/* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
50#define ALLOW_ANY_SHA1 07
7199c093 51static unsigned int allow_unadvertised_object_request;
f0cea83f 52static int shallow_nr;
b1e9fff7
JH
53static struct object_array have_obj;
54static struct object_array want_obj;
6523078b 55static struct object_array extra_edge_obj;
96f1e58f 56static unsigned int timeout;
115dedd7 57static int keepalive = 5;
d47f3db7
JH
58/* 0 for no sideband,
59 * otherwise maximum packet size (up to 65520 bytes).
60 */
96f1e58f 61static int use_sideband;
42526b47
SP
62static int advertise_refs;
63static int stateless_rpc;
20b20a22 64static const char *pack_objects_hook;
960deccb
PA
65
66static void reset_timeout(void)
67{
68 alarm(timeout);
69}
fb9040cc 70
fcf0fe9e 71static void send_client_data(int fd, const char *data, ssize_t sz)
583b7ea3 72{
4c4b7d1d
LF
73 if (use_sideband) {
74 send_sideband(1, fd, data, sz, use_sideband);
fcf0fe9e 75 return;
4c4b7d1d 76 }
958c24b1
JH
77 if (fd == 3)
78 /* emergency quit */
79 fd = 2;
80 if (fd == 2) {
93822c22 81 /* XXX: are we happy to lose stuff here? */
958c24b1 82 xwrite(fd, data, sz);
fcf0fe9e 83 return;
583b7ea3 84 }
cdf4fb8e 85 write_or_die(fd, data, sz);
583b7ea3
JH
86}
87
b790e0f6
NTND
88static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
89{
90 FILE *fp = cb_data;
91 if (graft->nr_parent == -1)
7683e2e6 92 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
b790e0f6
NTND
93 return 0;
94}
95
fb9040cc
LT
96static void create_pack_file(void)
97{
d3180279 98 struct child_process pack_objects = CHILD_PROCESS_INIT;
363b7817 99 char data[8193], progress[128];
583b7ea3
JH
100 char abort_msg[] = "aborting due to possible repository "
101 "corruption on the remote side.";
b1c71b72 102 int buffered = -1;
1456b043 103 ssize_t sz;
65a3629e 104 int i;
cdab4858 105 FILE *pipe_fd;
75bfc6c2 106
20b20a22
JK
107 if (!pack_objects_hook)
108 pack_objects.git_cmd = 1;
109 else {
110 argv_array_push(&pack_objects.args, pack_objects_hook);
111 argv_array_push(&pack_objects.args, "git");
112 pack_objects.use_shell = 1;
113 }
114
cdab4858 115 if (shallow_nr) {
65a3629e
MP
116 argv_array_push(&pack_objects.args, "--shallow-file");
117 argv_array_push(&pack_objects.args, "");
f0cea83f 118 }
65a3629e
MP
119 argv_array_push(&pack_objects.args, "pack-objects");
120 argv_array_push(&pack_objects.args, "--revs");
cdab4858 121 if (use_thin_pack)
65a3629e 122 argv_array_push(&pack_objects.args, "--thin");
75bfc6c2 123
65a3629e 124 argv_array_push(&pack_objects.args, "--stdout");
2dacf26d 125 if (shallow_nr)
65a3629e 126 argv_array_push(&pack_objects.args, "--shallow");
cc41fa8d 127 if (!no_progress)
65a3629e 128 argv_array_push(&pack_objects.args, "--progress");
cc41fa8d 129 if (use_ofs_delta)
65a3629e 130 argv_array_push(&pack_objects.args, "--delta-base-offset");
348e390b 131 if (use_include_tag)
65a3629e 132 argv_array_push(&pack_objects.args, "--include-tag");
cc41fa8d 133
b9612197 134 pack_objects.in = -1;
cc41fa8d
JS
135 pack_objects.out = -1;
136 pack_objects.err = -1;
21edd3f1 137
4c324c00 138 if (start_command(&pack_objects))
7e44c935 139 die("git upload-pack: unable to fork git-pack-objects");
b1c71b72 140
cdab4858
NTND
141 pipe_fd = xfdopen(pack_objects.in, "w");
142
b790e0f6
NTND
143 if (shallow_nr)
144 for_each_commit_graft(write_one_shallow, pipe_fd);
145
cdab4858
NTND
146 for (i = 0; i < want_obj.nr; i++)
147 fprintf(pipe_fd, "%s\n",
f2fd0760 148 oid_to_hex(&want_obj.objects[i].item->oid));
cdab4858
NTND
149 fprintf(pipe_fd, "--not\n");
150 for (i = 0; i < have_obj.nr; i++)
151 fprintf(pipe_fd, "%s\n",
f2fd0760 152 oid_to_hex(&have_obj.objects[i].item->oid));
cdab4858
NTND
153 for (i = 0; i < extra_edge_obj.nr; i++)
154 fprintf(pipe_fd, "%s\n",
f2fd0760 155 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
cdab4858
NTND
156 fprintf(pipe_fd, "\n");
157 fflush(pipe_fd);
158 fclose(pipe_fd);
f0cea83f 159
cc41fa8d
JS
160 /* We read from pack_objects.err to capture stderr output for
161 * progress bar, and pack_objects.out to capture the pack data.
b1c71b72 162 */
b1c71b72
JH
163
164 while (1) {
b1c71b72 165 struct pollfd pfd[2];
363b7817 166 int pe, pu, pollsize;
05e95155 167 int ret;
b1c71b72 168
0d516ada
ML
169 reset_timeout();
170
b1c71b72 171 pollsize = 0;
363b7817 172 pe = pu = -1;
b1c71b72 173
cc41fa8d
JS
174 if (0 <= pack_objects.out) {
175 pfd[pollsize].fd = pack_objects.out;
b1c71b72
JH
176 pfd[pollsize].events = POLLIN;
177 pu = pollsize;
178 pollsize++;
179 }
cc41fa8d
JS
180 if (0 <= pack_objects.err) {
181 pfd[pollsize].fd = pack_objects.err;
363b7817
JH
182 pfd[pollsize].events = POLLIN;
183 pe = pollsize;
184 pollsize++;
185 }
b1c71b72 186
4c324c00
JS
187 if (!pollsize)
188 break;
189
6c71f8b0
ET
190 ret = poll(pfd, pollsize,
191 keepalive < 0 ? -1 : 1000 * keepalive);
192
05e95155 193 if (ret < 0) {
4c324c00 194 if (errno != EINTR) {
d2b6afa2 195 error_errno("poll failed, resuming");
4c324c00 196 sleep(1);
b1c71b72 197 }
4c324c00
JS
198 continue;
199 }
6b59f51b
NP
200 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
201 /* Status ready; we ship that in the side-band
202 * or dump to the standard error.
203 */
204 sz = xread(pack_objects.err, progress,
205 sizeof(progress));
206 if (0 < sz)
207 send_client_data(2, progress, sz);
208 else if (sz == 0) {
209 close(pack_objects.err);
210 pack_objects.err = -1;
211 }
212 else
213 goto fail;
214 /* give priority to status messages */
215 continue;
216 }
4c324c00
JS
217 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
218 /* Data ready; we keep the last byte to ourselves
219 * in case we detect broken rev-list, so that we
220 * can leave the stream corrupted. This is
221 * unfortunate -- unpack-objects would happily
222 * accept a valid packdata with trailing garbage,
223 * so appending garbage after we pass all the
224 * pack data is not good enough to signal
225 * breakage to downstream.
226 */
227 char *cp = data;
228 ssize_t outsz = 0;
229 if (0 <= buffered) {
230 *cp++ = buffered;
231 outsz++;
b1c71b72 232 }
4c324c00
JS
233 sz = xread(pack_objects.out, cp,
234 sizeof(data) - outsz);
235 if (0 < sz)
1456b043 236 ;
4c324c00
JS
237 else if (sz == 0) {
238 close(pack_objects.out);
239 pack_objects.out = -1;
363b7817 240 }
4c324c00
JS
241 else
242 goto fail;
243 sz += outsz;
244 if (1 < sz) {
245 buffered = data[sz-1] & 0xFF;
246 sz--;
b1c71b72 247 }
4c324c00
JS
248 else
249 buffered = -1;
fcf0fe9e 250 send_client_data(1, data, sz);
4c324c00 251 }
05e95155
JK
252
253 /*
254 * We hit the keepalive timeout without saying anything; send
255 * an empty message on the data sideband just to let the other
256 * side know we're still working on it, but don't have any data
257 * yet.
258 *
259 * If we don't have a sideband channel, there's no room in the
260 * protocol to say anything, so those clients are just out of
261 * luck.
262 */
263 if (!ret && use_sideband) {
264 static const char buf[] = "0005\1";
265 write_or_die(1, buf, 5);
266 }
4c324c00 267 }
b1c71b72 268
4c324c00 269 if (finish_command(&pack_objects)) {
7e44c935 270 error("git upload-pack: git-pack-objects died with error.");
4c324c00
JS
271 goto fail;
272 }
b1c71b72 273
4c324c00
JS
274 /* flush the data */
275 if (0 <= buffered) {
276 data[0] = buffered;
fcf0fe9e 277 send_client_data(1, data, 1);
4c324c00 278 fprintf(stderr, "flushed.\n");
b1c71b72 279 }
4c324c00
JS
280 if (use_sideband)
281 packet_flush(1);
282 return;
283
b1c71b72 284 fail:
583b7ea3 285 send_client_data(3, abort_msg, sizeof(abort_msg));
7e44c935 286 die("git upload-pack: %s", abort_msg);
fb9040cc
LT
287}
288
cf93982f 289static int got_oid(const char *hex, struct object_id *oid)
def88e9a 290{
b1e9fff7 291 struct object *o;
937a515a 292 int we_knew_they_have = 0;
b1e9fff7 293
cf93982f 294 if (get_oid_hex(hex, oid))
7e44c935 295 die("git upload-pack: expected SHA1 object, got '%s'", hex);
cf93982f 296 if (!has_object_file(oid))
937a515a 297 return -1;
b1e9fff7 298
c251c83d 299 o = parse_object(oid);
b1e9fff7 300 if (!o)
cf93982f 301 die("oops (%s)", oid_to_hex(oid));
182a8dab 302 if (o->type == OBJ_COMMIT) {
b1e9fff7 303 struct commit_list *parents;
937a515a 304 struct commit *commit = (struct commit *)o;
b1e9fff7 305 if (o->flags & THEY_HAVE)
937a515a
JH
306 we_knew_they_have = 1;
307 else
308 o->flags |= THEY_HAVE;
309 if (!oldest_have || (commit->date < oldest_have))
310 oldest_have = commit->date;
311 for (parents = commit->parents;
b1e9fff7
JH
312 parents;
313 parents = parents->next)
314 parents->item->object.flags |= THEY_HAVE;
fb9040cc 315 }
937a515a
JH
316 if (!we_knew_they_have) {
317 add_object_array(o, NULL, &have_obj);
318 return 1;
319 }
320 return 0;
321}
322
323static int reachable(struct commit *want)
324{
5411b10c 325 struct prio_queue work = { compare_commits_by_commit_date };
937a515a 326
5411b10c
JK
327 prio_queue_put(&work, want);
328 while (work.nr) {
e510ab89 329 struct commit_list *list;
5411b10c 330 struct commit *commit = prio_queue_get(&work);
937a515a
JH
331
332 if (commit->object.flags & THEY_HAVE) {
333 want->object.flags |= COMMON_KNOWN;
334 break;
335 }
336 if (!commit->object.parsed)
c251c83d 337 parse_object(&commit->object.oid);
937a515a
JH
338 if (commit->object.flags & REACHABLE)
339 continue;
340 commit->object.flags |= REACHABLE;
341 if (commit->date < oldest_have)
342 continue;
343 for (list = commit->parents; list; list = list->next) {
344 struct commit *parent = list->item;
345 if (!(parent->object.flags & REACHABLE))
5411b10c 346 prio_queue_put(&work, parent);
937a515a
JH
347 }
348 }
349 want->object.flags |= REACHABLE;
350 clear_commit_marks(want, REACHABLE);
5411b10c 351 clear_prio_queue(&work);
937a515a
JH
352 return (want->object.flags & COMMON_KNOWN);
353}
354
355static int ok_to_give_up(void)
356{
357 int i;
358
359 if (!have_obj.nr)
360 return 0;
361
362 for (i = 0; i < want_obj.nr; i++) {
363 struct object *want = want_obj.objects[i].item;
364
365 if (want->flags & COMMON_KNOWN)
366 continue;
367 want = deref_tag(want, "a want line", 0);
368 if (!want || want->type != OBJ_COMMIT) {
369 /* no way to tell if this is reachable by
370 * looking at the ancestry chain alone, so
371 * leave a note to ourselves not to worry about
372 * this object anymore.
373 */
374 want_obj.objects[i].item->flags |= COMMON_KNOWN;
375 continue;
376 }
377 if (!reachable((struct commit *)want))
378 return 0;
379 }
fb9040cc 380 return 1;
def88e9a
LT
381}
382
383static int get_common_commits(void)
384{
cf93982f 385 struct object_id oid;
386 char last_hex[GIT_MAX_HEXSZ + 1];
49bee717
SP
387 int got_common = 0;
388 int got_other = 0;
4e10cf9a 389 int sent_ready = 0;
def88e9a 390
f0243f26
JS
391 save_commit_buffer = 0;
392
eeefa7c9 393 for (;;) {
74543a04 394 char *line = packet_read_line(0, NULL);
8bf3b758
NTND
395 const char *arg;
396
960deccb 397 reset_timeout();
def88e9a 398
74543a04 399 if (!line) {
49bee717 400 if (multi_ack == 2 && got_common
4e10cf9a
JH
401 && !got_other && ok_to_give_up()) {
402 sent_ready = 1;
81c634e9 403 packet_write_fmt(1, "ACK %s ready\n", last_hex);
4e10cf9a 404 }
b1e9fff7 405 if (have_obj.nr == 0 || multi_ack)
81c634e9 406 packet_write_fmt(1, "NAK\n");
4e10cf9a
JH
407
408 if (no_done && sent_ready) {
81c634e9 409 packet_write_fmt(1, "ACK %s\n", last_hex);
4e10cf9a
JH
410 return 0;
411 }
42526b47
SP
412 if (stateless_rpc)
413 exit(0);
49bee717
SP
414 got_common = 0;
415 got_other = 0;
def88e9a
LT
416 continue;
417 }
8bf3b758 418 if (skip_prefix(line, "have ", &arg)) {
cf93982f 419 switch (got_oid(arg, &oid)) {
937a515a 420 case -1: /* they have what we do not */
49bee717 421 got_other = 1;
78affc49 422 if (multi_ack && ok_to_give_up()) {
cf93982f 423 const char *hex = oid_to_hex(&oid);
4e10cf9a
JH
424 if (multi_ack == 2) {
425 sent_ready = 1;
81c634e9 426 packet_write_fmt(1, "ACK %s ready\n", hex);
4e10cf9a 427 } else
81c634e9 428 packet_write_fmt(1, "ACK %s continue\n", hex);
78affc49 429 }
937a515a
JH
430 break;
431 default:
49bee717 432 got_common = 1;
cf93982f 433 memcpy(last_hex, oid_to_hex(&oid), 41);
78affc49 434 if (multi_ack == 2)
81c634e9 435 packet_write_fmt(1, "ACK %s common\n", last_hex);
78affc49 436 else if (multi_ack)
81c634e9 437 packet_write_fmt(1, "ACK %s continue\n", last_hex);
c04c4e57 438 else if (have_obj.nr == 1)
81c634e9 439 packet_write_fmt(1, "ACK %s\n", last_hex);
937a515a 440 break;
af2d3aa4 441 }
def88e9a
LT
442 continue;
443 }
444 if (!strcmp(line, "done")) {
b1e9fff7 445 if (have_obj.nr > 0) {
1bd8c8f0 446 if (multi_ack)
81c634e9 447 packet_write_fmt(1, "ACK %s\n", last_hex);
1bd8c8f0
JS
448 return 0;
449 }
81c634e9 450 packet_write_fmt(1, "NAK\n");
def88e9a
LT
451 return -1;
452 }
7e44c935 453 die("git upload-pack: expected SHA1 list, got '%s'", line);
def88e9a 454 }
def88e9a
LT
455}
456
390eb36b
JH
457static int is_our_ref(struct object *o)
458{
68ee6289
FM
459 int allow_hidden_ref = (allow_unadvertised_object_request &
460 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
7199c093 461 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
390eb36b
JH
462}
463
2997178e
NTND
464/*
465 * on successful case, it's up to the caller to close cmd->out
466 */
467static int do_reachable_revlist(struct child_process *cmd,
079aa97e
NTND
468 struct object_array *src,
469 struct object_array *reachable)
051e4005
JH
470{
471 static const char *argv[] = {
472 "rev-list", "--stdin", NULL,
473 };
051e4005
JH
474 struct object *o;
475 char namebuf[42]; /* ^ + SHA-1 + LF */
476 int i;
477
2997178e
NTND
478 cmd->argv = argv;
479 cmd->git_cmd = 1;
480 cmd->no_stderr = 1;
481 cmd->in = -1;
482 cmd->out = -1;
051e4005
JH
483
484 /*
7fcbd37f
NTND
485 * If the next rev-list --stdin encounters an unknown commit,
486 * it terminates, which will cause SIGPIPE in the write loop
051e4005
JH
487 * below.
488 */
489 sigchain_push(SIGPIPE, SIG_IGN);
490
2997178e 491 if (start_command(cmd))
7fcbd37f
NTND
492 goto error;
493
051e4005 494 namebuf[0] = '^';
cf93982f 495 namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
051e4005
JH
496 for (i = get_max_object_index(); 0 < i; ) {
497 o = get_indexed_object(--i);
2a745324
BH
498 if (!o)
499 continue;
079aa97e
NTND
500 if (reachable && o->type == OBJ_COMMIT)
501 o->flags &= ~TMP_MARK;
390eb36b 502 if (!is_our_ref(o))
051e4005 503 continue;
f2fd0760 504 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
cf93982f 505 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
051e4005
JH
506 goto error;
507 }
cf93982f 508 namebuf[GIT_SHA1_HEXSZ] = '\n';
3f0f6624
NTND
509 for (i = 0; i < src->nr; i++) {
510 o = src->objects[i].item;
079aa97e
NTND
511 if (is_our_ref(o)) {
512 if (reachable)
513 add_object_array(o, NULL, reachable);
051e4005 514 continue;
079aa97e
NTND
515 }
516 if (reachable && o->type == OBJ_COMMIT)
517 o->flags |= TMP_MARK;
f2fd0760 518 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
cf93982f 519 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
051e4005
JH
520 goto error;
521 }
2997178e
NTND
522 close(cmd->in);
523 cmd->in = -1;
524 sigchain_pop(SIGPIPE);
051e4005 525
2997178e
NTND
526 return 0;
527
528error:
051e4005
JH
529 sigchain_pop(SIGPIPE);
530
2997178e
NTND
531 if (cmd->in >= 0)
532 close(cmd->in);
533 if (cmd->out >= 0)
534 close(cmd->out);
535 return -1;
536}
537
079aa97e
NTND
538static int get_reachable_list(struct object_array *src,
539 struct object_array *reachable)
540{
541 struct child_process cmd = CHILD_PROCESS_INIT;
542 int i;
543 struct object *o;
544 char namebuf[42]; /* ^ + SHA-1 + LF */
545
546 if (do_reachable_revlist(&cmd, src, reachable) < 0)
547 return -1;
548
549 while ((i = read_in_full(cmd.out, namebuf, 41)) == 41) {
550 struct object_id sha1;
551
552 if (namebuf[40] != '\n' || get_oid_hex(namebuf, &sha1))
553 break;
554
555 o = lookup_object(sha1.hash);
556 if (o && o->type == OBJ_COMMIT) {
557 o->flags &= ~TMP_MARK;
558 }
559 }
560 for (i = get_max_object_index(); 0 < i; i--) {
561 o = get_indexed_object(i - 1);
562 if (o && o->type == OBJ_COMMIT &&
563 (o->flags & TMP_MARK)) {
564 add_object_array(o, NULL, reachable);
565 o->flags &= ~TMP_MARK;
566 }
567 }
568 close(cmd.out);
569
570 if (finish_command(&cmd))
571 return -1;
572
573 return 0;
574}
575
2997178e
NTND
576static int has_unreachable(struct object_array *src)
577{
578 struct child_process cmd = CHILD_PROCESS_INIT;
579 char buf[1];
580 int i;
581
079aa97e 582 if (do_reachable_revlist(&cmd, src, NULL) < 0)
2997178e 583 return 1;
051e4005
JH
584
585 /*
586 * The commits out of the rev-list are not ancestors of
587 * our ref.
588 */
2997178e 589 i = read_in_full(cmd.out, buf, 1);
051e4005
JH
590 if (i)
591 goto error;
592 close(cmd.out);
7fcbd37f 593 cmd.out = -1;
051e4005
JH
594
595 /*
596 * rev-list may have died by encountering a bad commit
597 * in the history, in which case we do want to bail out
598 * even when it showed no commit.
599 */
600 if (finish_command(&cmd))
601 goto error;
602
603 /* All the non-tip ones are ancestors of what we advertised */
3f0f6624 604 return 0;
051e4005
JH
605
606error:
7fcbd37f 607 sigchain_pop(SIGPIPE);
7fcbd37f
NTND
608 if (cmd.out >= 0)
609 close(cmd.out);
3f0f6624
NTND
610 return 1;
611}
7fcbd37f 612
3f0f6624
NTND
613static void check_non_tip(void)
614{
615 int i;
616
617 /*
618 * In the normal in-process case without
619 * uploadpack.allowReachableSHA1InWant,
620 * non-tip requests can never happen.
621 */
622 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
623 goto error;
624 if (!has_unreachable(&want_obj))
625 /* All the non-tip ones are ancestors of what we advertised */
626 return;
051e4005
JH
627
628error:
629 /* Pick one of them (we know there at least is one) */
630 for (i = 0; i < want_obj.nr; i++) {
3f0f6624 631 struct object *o = want_obj.objects[i].item;
390eb36b 632 if (!is_our_ref(o))
051e4005 633 die("git upload-pack: not our ref %s",
f2fd0760 634 oid_to_hex(&o->oid));
051e4005
JH
635 }
636}
637
5c24cdea
NTND
638static void send_shallow(struct commit_list *result)
639{
640 while (result) {
641 struct object *object = &result->item->object;
642 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
dbaa6bdc
JH
643 packet_write_fmt(1, "shallow %s",
644 oid_to_hex(&object->oid));
e92b848c 645 register_shallow(&object->oid);
5c24cdea
NTND
646 shallow_nr++;
647 }
648 result = result->next;
649 }
650}
651
873700c9 652static void send_unshallow(const struct object_array *shallows)
e8e44de7 653{
e8e44de7 654 int i;
873700c9 655
e8e44de7
NTND
656 for (i = 0; i < shallows->nr; i++) {
657 struct object *object = shallows->objects[i].item;
658 if (object->flags & NOT_SHALLOW) {
659 struct commit_list *parents;
dbaa6bdc
JH
660 packet_write_fmt(1, "unshallow %s",
661 oid_to_hex(&object->oid));
e8e44de7 662 object->flags &= ~CLIENT_SHALLOW;
873700c9
NTND
663 /*
664 * We want to _register_ "object" as shallow, but we
665 * also need to traverse object's parents to deepen a
666 * shallow clone. Unregister it for now so we can
667 * parse and add the parents to the want list, then
668 * re-register it.
669 */
e92b848c 670 unregister_shallow(&object->oid);
e8e44de7
NTND
671 object->parsed = 0;
672 parse_commit_or_die((struct commit *)object);
673 parents = ((struct commit *)object)->parents;
674 while (parents) {
675 add_object_array(&parents->item->object,
676 NULL, &want_obj);
677 parents = parents->next;
678 }
679 add_object_array(object, NULL, &extra_edge_obj);
680 }
681 /* make sure commit traversal conforms to client */
e92b848c 682 register_shallow(&object->oid);
e8e44de7 683 }
873700c9
NTND
684}
685
cccf74e2
NTND
686static void deepen(int depth, int deepen_relative,
687 struct object_array *shallows)
873700c9
NTND
688{
689 if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
690 int i;
691
692 for (i = 0; i < shallows->nr; i++) {
693 struct object *object = shallows->objects[i].item;
694 object->flags |= NOT_SHALLOW;
695 }
cccf74e2
NTND
696 } else if (deepen_relative) {
697 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
698 struct commit_list *result;
699
700 get_reachable_list(shallows, &reachable_shallows);
701 result = get_shallow_commits(&reachable_shallows,
702 depth + 1,
703 SHALLOW, NOT_SHALLOW);
704 send_shallow(result);
705 free_commit_list(result);
706 object_array_clear(&reachable_shallows);
873700c9
NTND
707 } else {
708 struct commit_list *result;
709
710 result = get_shallow_commits(&want_obj, depth,
711 SHALLOW, NOT_SHALLOW);
712 send_shallow(result);
713 free_commit_list(result);
714 }
715
716 send_unshallow(shallows);
e8e44de7
NTND
717 packet_flush(1);
718}
719
569e554b
NTND
720static void deepen_by_rev_list(int ac, const char **av,
721 struct object_array *shallows)
722{
723 struct commit_list *result;
724
725 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
726 send_shallow(result);
727 free_commit_list(result);
728 send_unshallow(shallows);
729 packet_flush(1);
730}
731
b1e9fff7 732static void receive_needs(void)
fb9040cc 733{
3cd47459 734 struct object_array shallows = OBJECT_ARRAY_INIT;
269a7a83 735 struct string_list deepen_not = STRING_LIST_INIT_DUP;
74543a04 736 int depth = 0;
051e4005 737 int has_non_tip = 0;
569e554b
NTND
738 unsigned long deepen_since = 0;
739 int deepen_rev_list = 0;
fb9040cc 740
f0cea83f 741 shallow_nr = 0;
fb9040cc 742 for (;;) {
565ebbf7 743 struct object *o;
f47182c8 744 const char *features;
cf93982f 745 struct object_id oid_buf;
74543a04 746 char *line = packet_read_line(0, NULL);
8bf3b758
NTND
747 const char *arg;
748
960deccb 749 reset_timeout();
74543a04 750 if (!line)
ed09aef0 751 break;
e091eb93 752
8bf3b758 753 if (skip_prefix(line, "shallow ", &arg)) {
cf93982f 754 struct object_id oid;
ed09aef0 755 struct object *object;
cf93982f 756 if (get_oid_hex(arg, &oid))
ed09aef0 757 die("invalid shallow line: %s", line);
c251c83d 758 object = parse_object(&oid);
ed09aef0 759 if (!object)
af04fa2a 760 continue;
6293ded3 761 if (object->type != OBJ_COMMIT)
cf93982f 762 die("invalid shallow object %s", oid_to_hex(&oid));
e58e57e4
JK
763 if (!(object->flags & CLIENT_SHALLOW)) {
764 object->flags |= CLIENT_SHALLOW;
765 add_object_array(object, NULL, &shallows);
766 }
ed09aef0
JS
767 continue;
768 }
8bf3b758 769 if (skip_prefix(line, "deepen ", &arg)) {
6e414e30 770 char *end = NULL;
8bf3b758 771 depth = strtol(arg, &end, 0);
6e414e30 772 if (!end || *end || depth <= 0)
016e6ccb
JS
773 die("Invalid deepen: %s", line);
774 continue;
775 }
569e554b
NTND
776 if (skip_prefix(line, "deepen-since ", &arg)) {
777 char *end = NULL;
778 deepen_since = strtoul(arg, &end, 0);
779 if (!end || *end || !deepen_since ||
780 /* revisions.c's max_age -1 is special */
781 deepen_since == -1)
782 die("Invalid deepen-since: %s", line);
783 deepen_rev_list = 1;
784 continue;
785 }
269a7a83
NTND
786 if (skip_prefix(line, "deepen-not ", &arg)) {
787 char *ref = NULL;
cf93982f 788 struct object_id oid;
789 if (expand_ref(arg, strlen(arg), oid.hash, &ref) != 1)
269a7a83
NTND
790 die("git upload-pack: ambiguous deepen-not: %s", line);
791 string_list_append(&deepen_not, ref);
792 free(ref);
793 deepen_rev_list = 1;
794 continue;
795 }
8bf3b758 796 if (!skip_prefix(line, "want ", &arg) ||
cf93982f 797 get_oid_hex(arg, &oid_buf))
7e44c935 798 die("git upload-pack: protocol error, "
e091eb93 799 "expected to get sha, not '%s'", line);
f47182c8 800
8bf3b758 801 features = arg + 40;
f47182c8 802
cccf74e2
NTND
803 if (parse_feature_request(features, "deepen-relative"))
804 deepen_relative = 1;
f47182c8 805 if (parse_feature_request(features, "multi_ack_detailed"))
78affc49 806 multi_ack = 2;
f47182c8 807 else if (parse_feature_request(features, "multi_ack"))
1bd8c8f0 808 multi_ack = 1;
f47182c8 809 if (parse_feature_request(features, "no-done"))
4e10cf9a 810 no_done = 1;
f47182c8 811 if (parse_feature_request(features, "thin-pack"))
b19696c2 812 use_thin_pack = 1;
f47182c8 813 if (parse_feature_request(features, "ofs-delta"))
e4fe4b8e 814 use_ofs_delta = 1;
f47182c8 815 if (parse_feature_request(features, "side-band-64k"))
d47f3db7 816 use_sideband = LARGE_PACKET_MAX;
f47182c8 817 else if (parse_feature_request(features, "side-band"))
d47f3db7 818 use_sideband = DEFAULT_PACKET_MAX;
f47182c8 819 if (parse_feature_request(features, "no-progress"))
b0e90897 820 no_progress = 1;
f47182c8 821 if (parse_feature_request(features, "include-tag"))
348e390b 822 use_include_tag = 1;
565ebbf7 823
c251c83d 824 o = parse_object(&oid_buf);
bdb31ead
JT
825 if (!o) {
826 packet_write_fmt(1,
827 "ERR upload-pack: not our ref %s",
cf93982f 828 oid_to_hex(&oid_buf));
9f9aa761 829 die("git upload-pack: not our ref %s",
cf93982f 830 oid_to_hex(&oid_buf));
bdb31ead 831 }
565ebbf7
JH
832 if (!(o->flags & WANTED)) {
833 o->flags |= WANTED;
f8edeaa0
DT
834 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
835 || is_our_ref(o)))
051e4005 836 has_non_tip = 1;
b1e9fff7 837 add_object_array(o, NULL, &want_obj);
565ebbf7 838 }
fb9040cc 839 }
9462e3f5 840
051e4005
JH
841 /*
842 * We have sent all our refs already, and the other end
843 * should have chosen out of them. When we are operating
844 * in the stateless RPC mode, however, their choice may
845 * have been based on the set of older refs advertised
846 * by another process that handled the initial request.
847 */
848 if (has_non_tip)
849 check_non_tip();
850
9462e3f5
JS
851 if (!use_sideband && daemon_mode)
852 no_progress = 1;
853
569e554b 854 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
f53514bc 855 return;
569e554b 856 if (depth > 0 && deepen_rev_list)
269a7a83 857 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
e8e44de7 858 if (depth > 0)
cccf74e2 859 deepen(depth, deepen_relative, &shallows);
569e554b
NTND
860 else if (deepen_rev_list) {
861 struct argv_array av = ARGV_ARRAY_INIT;
f53514bc 862 int i;
569e554b
NTND
863
864 argv_array_push(&av, "rev-list");
865 if (deepen_since)
866 argv_array_pushf(&av, "--max-age=%lu", deepen_since);
269a7a83
NTND
867 if (deepen_not.nr) {
868 argv_array_push(&av, "--not");
869 for (i = 0; i < deepen_not.nr; i++) {
870 struct string_list_item *s = deepen_not.items + i;
871 argv_array_push(&av, s->string);
f53514bc 872 }
269a7a83 873 argv_array_push(&av, "--not");
016e6ccb 874 }
569e554b
NTND
875 for (i = 0; i < want_obj.nr; i++) {
876 struct object *o = want_obj.objects[i].item;
877 argv_array_push(&av, oid_to_hex(&o->oid));
f53514bc 878 }
569e554b
NTND
879 deepen_by_rev_list(av.argc, av.argv, &shallows);
880 argv_array_clear(&av);
881 }
e8e44de7 882 else
f53514bc
JS
883 if (shallows.nr > 0) {
884 int i;
885 for (i = 0; i < shallows.nr; i++)
e92b848c 886 register_shallow(&shallows.objects[i].item->oid);
f53514bc 887 }
f0cea83f
NE
888
889 shallow_nr += shallows.nr;
f53514bc 890 free(shallows.objects);
fb9040cc
LT
891}
892
daebaa78 893/* return non-zero if the ref is hidden, otherwise 0 */
78a766ab
LF
894static int mark_our_ref(const char *refname, const char *refname_full,
895 const struct object_id *oid)
cbbe50db 896{
363e98bf 897 struct object *o = lookup_unknown_object(oid->hash);
daebaa78 898
78a766ab 899 if (ref_is_hidden(refname, refname_full)) {
390eb36b 900 o->flags |= HIDDEN_REF;
daebaa78 901 return 1;
390eb36b 902 }
3f1da57f 903 o->flags |= OUR_REF;
cbbe50db
JH
904 return 0;
905}
906
78a766ab 907static int check_ref(const char *refname_full, const struct object_id *oid,
363e98bf 908 int flag, void *cb_data)
e172755b 909{
78a766ab
LF
910 const char *refname = strip_namespace(refname_full);
911
912 mark_our_ref(refname, refname_full, oid);
e172755b
JK
913 return 0;
914}
915
7171d8c1
JH
916static void format_symref_info(struct strbuf *buf, struct string_list *symref)
917{
918 struct string_list_item *item;
919
920 if (!symref->nr)
921 return;
922 for_each_string_list_item(item, symref)
923 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
924}
925
363e98bf
MH
926static int send_ref(const char *refname, const struct object_id *oid,
927 int flag, void *cb_data)
def88e9a 928{
ed09aef0 929 static const char *capabilities = "multi_ack thin-pack side-band"
cccf74e2
NTND
930 " side-band-64k ofs-delta shallow deepen-since deepen-not"
931 " deepen-relative no-progress include-tag multi_ack_detailed";
6b01ecfe 932 const char *refname_nons = strip_namespace(refname);
21758aff 933 struct object_id peeled;
b5b16990 934
78a766ab 935 if (mark_our_ref(refname_nons, refname, oid))
daebaa78 936 return 0;
cbbe50db 937
7171d8c1
JH
938 if (capabilities) {
939 struct strbuf symref_info = STRBUF_INIT;
940
941 format_symref_info(&symref_info, cb_data);
81c634e9 942 packet_write_fmt(1, "%s %s%c%s%s%s%s%s agent=%s\n",
363e98bf 943 oid_to_hex(oid), refname_nons,
cf2ad8e6 944 0, capabilities,
7199c093
FM
945 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
946 " allow-tip-sha1-in-want" : "",
68ee6289
FM
947 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
948 " allow-reachable-sha1-in-want" : "",
ff5effdf 949 stateless_rpc ? " no-done" : "",
7171d8c1 950 symref_info.buf,
ff5effdf 951 git_user_agent_sanitized());
7171d8c1
JH
952 strbuf_release(&symref_info);
953 } else {
81c634e9 954 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
7171d8c1 955 }
1f5881bb 956 capabilities = NULL;
21758aff 957 if (!peel_ref(refname, peeled.hash))
81c634e9 958 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
def88e9a
LT
959 return 0;
960}
961
7dabd056
MH
962static int find_symref(const char *refname, const struct object_id *oid,
963 int flag, void *cb_data)
7171d8c1
JH
964{
965 const char *symref_target;
966 struct string_list_item *item;
e45a4949 967 struct object_id unused;
7171d8c1
JH
968
969 if ((flag & REF_ISSYMREF) == 0)
970 return 0;
e45a4949 971 symref_target = resolve_ref_unsafe(refname, 0, unused.hash, &flag);
7171d8c1
JH
972 if (!symref_target || (flag & REF_ISSYMREF) == 0)
973 die("'%s' is a symref but it is not?", refname);
974 item = string_list_append(cb_data, refname);
975 item->util = xstrdup(symref_target);
976 return 0;
977}
978
59076eba 979static void upload_pack(void)
def88e9a 980{
7171d8c1
JH
981 struct string_list symref = STRING_LIST_INIT_DUP;
982
983 head_ref_namespaced(find_symref, &symref);
984
42526b47
SP
985 if (advertise_refs || !stateless_rpc) {
986 reset_timeout();
7171d8c1
JH
987 head_ref_namespaced(send_ref, &symref);
988 for_each_namespaced_ref(send_ref, &symref);
ad491366 989 advertise_shallow_grafts(1);
42526b47
SP
990 packet_flush(1);
991 } else {
e172755b
JK
992 head_ref_namespaced(check_ref, NULL);
993 for_each_namespaced_ref(check_ref, NULL);
42526b47 994 }
7171d8c1 995 string_list_clear(&symref, 1);
42526b47
SP
996 if (advertise_refs)
997 return;
998
b1e9fff7 999 receive_needs();
59076eba
DR
1000 if (want_obj.nr) {
1001 get_common_commits();
1002 create_pack_file();
1003 }
def88e9a
LT
1004}
1005
daebaa78
JH
1006static int upload_pack_config(const char *var, const char *value, void *unused)
1007{
7199c093
FM
1008 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1009 if (git_config_bool(var, value))
1010 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1011 else
1012 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
68ee6289
FM
1013 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1014 if (git_config_bool(var, value))
1015 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1016 else
1017 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
f8edeaa0
DT
1018 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1019 if (git_config_bool(var, value))
1020 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1021 else
1022 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
7199c093 1023 } else if (!strcmp("uploadpack.keepalive", var)) {
05e95155
JK
1024 keepalive = git_config_int(var, value);
1025 if (!keepalive)
1026 keepalive = -1;
20b20a22
JK
1027 } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1028 if (!strcmp("uploadpack.packobjectshook", var))
1029 return git_config_string(&pack_objects_hook, var, value);
05e95155 1030 }
daebaa78
JH
1031 return parse_hide_refs_config(var, value, "uploadpack");
1032}
1033
3f2e2297 1034int cmd_main(int argc, const char **argv)
def88e9a 1035{
9812f213 1036 const char *dir;
960deccb 1037 int strict = 0;
9812f213
AQ
1038 struct option options[] = {
1039 OPT_BOOL(0, "stateless-rpc", &stateless_rpc,
1040 N_("quit after a single request/response exchange")),
1041 OPT_BOOL(0, "advertise-refs", &advertise_refs,
2e3a16b2 1042 N_("exit immediately after initial ref advertisement")),
9812f213
AQ
1043 OPT_BOOL(0, "strict", &strict,
1044 N_("do not try <directory>/.git/ if <directory> is no Git directory")),
1045 OPT_INTEGER(0, "timeout", &timeout,
1046 N_("interrupt transfer after <n> seconds of inactivity")),
1047 OPT_END()
1048 };
960deccb 1049
bbc30f99 1050 packet_trace_identity("upload-pack");
afc711b8 1051 check_replace_refs = 0;
2fb3f6db 1052
9812f213 1053 argc = parse_options(argc, argv, NULL, options, upload_pack_usage, 0);
960deccb 1054
9812f213
AQ
1055 if (argc != 1)
1056 usage_with_options(upload_pack_usage, options);
a6080a0a 1057
9812f213
AQ
1058 if (timeout)
1059 daemon_mode = 1;
04b33055 1060
e1464ca7 1061 setup_path();
04b33055 1062
9812f213 1063 dir = argv[0];
113b9475 1064
8d630132 1065 if (!enter_repo(dir, strict))
05ac6b34 1066 die("'%s' does not appear to be a git repository", dir);
ad491366 1067
daebaa78 1068 git_config(upload_pack_config, NULL);
def88e9a
LT
1069 upload_pack();
1070 return 0;
1071}