upload-pack: read config when serving protocol v2
[git/git.git] / upload-pack.c
CommitLineData
def88e9a 1#include "cache.h"
b2141fc1 2#include "config.h"
def88e9a
LT
3#include "refs.h"
4#include "pkt-line.h"
958c24b1 5#include "sideband.h"
f6b42a81
JH
6#include "tag.h"
7#include "object.h"
f0243f26 8#include "commit.h"
9b8dc263
JS
9#include "diff.h"
10#include "revision.h"
11#include "list-objects.h"
10ac85c7
JH
12#include "list-objects-filter.h"
13#include "list-objects-filter-options.h"
cc41fa8d 14#include "run-command.h"
47a59185 15#include "connect.h"
051e4005 16#include "sigchain.h"
ff5effdf 17#include "version.h"
daebaa78 18#include "string-list.h"
569e554b 19#include "argv-array.h"
5411b10c 20#include "prio-queue.h"
aa9bab29 21#include "protocol.h"
10ac85c7 22#include "quote.h"
a3d6b53e 23#include "upload-pack.h"
3145ea95 24#include "serve.h"
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
dddbad72 38static timestamp_t 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 62static int stateless_rpc;
20b20a22 63static const char *pack_objects_hook;
960deccb 64
10ac85c7 65static int filter_capability_requested;
c7620bd0 66static int allow_filter;
10ac85c7
JH
67static struct list_objects_filter_options filter_options;
68
960deccb
PA
69static void reset_timeout(void)
70{
71 alarm(timeout);
72}
fb9040cc 73
fcf0fe9e 74static void send_client_data(int fd, const char *data, ssize_t sz)
583b7ea3 75{
4c4b7d1d
LF
76 if (use_sideband) {
77 send_sideband(1, fd, data, sz, use_sideband);
fcf0fe9e 78 return;
4c4b7d1d 79 }
958c24b1
JH
80 if (fd == 3)
81 /* emergency quit */
82 fd = 2;
83 if (fd == 2) {
93822c22 84 /* XXX: are we happy to lose stuff here? */
958c24b1 85 xwrite(fd, data, sz);
fcf0fe9e 86 return;
583b7ea3 87 }
cdf4fb8e 88 write_or_die(fd, data, sz);
583b7ea3
JH
89}
90
b790e0f6
NTND
91static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
92{
93 FILE *fp = cb_data;
94 if (graft->nr_parent == -1)
7683e2e6 95 fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
b790e0f6
NTND
96 return 0;
97}
98
fb9040cc
LT
99static void create_pack_file(void)
100{
d3180279 101 struct child_process pack_objects = CHILD_PROCESS_INIT;
363b7817 102 char data[8193], progress[128];
583b7ea3
JH
103 char abort_msg[] = "aborting due to possible repository "
104 "corruption on the remote side.";
b1c71b72 105 int buffered = -1;
1456b043 106 ssize_t sz;
65a3629e 107 int i;
cdab4858 108 FILE *pipe_fd;
75bfc6c2 109
20b20a22
JK
110 if (!pack_objects_hook)
111 pack_objects.git_cmd = 1;
112 else {
113 argv_array_push(&pack_objects.args, pack_objects_hook);
114 argv_array_push(&pack_objects.args, "git");
115 pack_objects.use_shell = 1;
116 }
117
cdab4858 118 if (shallow_nr) {
65a3629e
MP
119 argv_array_push(&pack_objects.args, "--shallow-file");
120 argv_array_push(&pack_objects.args, "");
f0cea83f 121 }
65a3629e
MP
122 argv_array_push(&pack_objects.args, "pack-objects");
123 argv_array_push(&pack_objects.args, "--revs");
cdab4858 124 if (use_thin_pack)
65a3629e 125 argv_array_push(&pack_objects.args, "--thin");
75bfc6c2 126
65a3629e 127 argv_array_push(&pack_objects.args, "--stdout");
2dacf26d 128 if (shallow_nr)
65a3629e 129 argv_array_push(&pack_objects.args, "--shallow");
cc41fa8d 130 if (!no_progress)
65a3629e 131 argv_array_push(&pack_objects.args, "--progress");
cc41fa8d 132 if (use_ofs_delta)
65a3629e 133 argv_array_push(&pack_objects.args, "--delta-base-offset");
348e390b 134 if (use_include_tag)
65a3629e 135 argv_array_push(&pack_objects.args, "--include-tag");
10ac85c7 136 if (filter_options.filter_spec) {
0b6069fe
JT
137 if (pack_objects.use_shell) {
138 struct strbuf buf = STRBUF_INIT;
139 sq_quote_buf(&buf, filter_options.filter_spec);
140 argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
141 strbuf_release(&buf);
142 } else {
143 argv_array_pushf(&pack_objects.args, "--filter=%s",
144 filter_options.filter_spec);
145 }
10ac85c7 146 }
cc41fa8d 147
b9612197 148 pack_objects.in = -1;
cc41fa8d
JS
149 pack_objects.out = -1;
150 pack_objects.err = -1;
21edd3f1 151
4c324c00 152 if (start_command(&pack_objects))
7e44c935 153 die("git upload-pack: unable to fork git-pack-objects");
b1c71b72 154
cdab4858
NTND
155 pipe_fd = xfdopen(pack_objects.in, "w");
156
b790e0f6
NTND
157 if (shallow_nr)
158 for_each_commit_graft(write_one_shallow, pipe_fd);
159
cdab4858
NTND
160 for (i = 0; i < want_obj.nr; i++)
161 fprintf(pipe_fd, "%s\n",
f2fd0760 162 oid_to_hex(&want_obj.objects[i].item->oid));
cdab4858
NTND
163 fprintf(pipe_fd, "--not\n");
164 for (i = 0; i < have_obj.nr; i++)
165 fprintf(pipe_fd, "%s\n",
f2fd0760 166 oid_to_hex(&have_obj.objects[i].item->oid));
cdab4858
NTND
167 for (i = 0; i < extra_edge_obj.nr; i++)
168 fprintf(pipe_fd, "%s\n",
f2fd0760 169 oid_to_hex(&extra_edge_obj.objects[i].item->oid));
cdab4858
NTND
170 fprintf(pipe_fd, "\n");
171 fflush(pipe_fd);
172 fclose(pipe_fd);
f0cea83f 173
cc41fa8d
JS
174 /* We read from pack_objects.err to capture stderr output for
175 * progress bar, and pack_objects.out to capture the pack data.
b1c71b72 176 */
b1c71b72
JH
177
178 while (1) {
b1c71b72 179 struct pollfd pfd[2];
363b7817 180 int pe, pu, pollsize;
05e95155 181 int ret;
b1c71b72 182
0d516ada
ML
183 reset_timeout();
184
b1c71b72 185 pollsize = 0;
363b7817 186 pe = pu = -1;
b1c71b72 187
cc41fa8d
JS
188 if (0 <= pack_objects.out) {
189 pfd[pollsize].fd = pack_objects.out;
b1c71b72
JH
190 pfd[pollsize].events = POLLIN;
191 pu = pollsize;
192 pollsize++;
193 }
cc41fa8d
JS
194 if (0 <= pack_objects.err) {
195 pfd[pollsize].fd = pack_objects.err;
363b7817
JH
196 pfd[pollsize].events = POLLIN;
197 pe = pollsize;
198 pollsize++;
199 }
b1c71b72 200
4c324c00
JS
201 if (!pollsize)
202 break;
203
6c71f8b0
ET
204 ret = poll(pfd, pollsize,
205 keepalive < 0 ? -1 : 1000 * keepalive);
206
05e95155 207 if (ret < 0) {
4c324c00 208 if (errno != EINTR) {
d2b6afa2 209 error_errno("poll failed, resuming");
4c324c00 210 sleep(1);
b1c71b72 211 }
4c324c00
JS
212 continue;
213 }
6b59f51b
NP
214 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
215 /* Status ready; we ship that in the side-band
216 * or dump to the standard error.
217 */
218 sz = xread(pack_objects.err, progress,
219 sizeof(progress));
220 if (0 < sz)
221 send_client_data(2, progress, sz);
222 else if (sz == 0) {
223 close(pack_objects.err);
224 pack_objects.err = -1;
225 }
226 else
227 goto fail;
228 /* give priority to status messages */
229 continue;
230 }
4c324c00
JS
231 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
232 /* Data ready; we keep the last byte to ourselves
233 * in case we detect broken rev-list, so that we
234 * can leave the stream corrupted. This is
235 * unfortunate -- unpack-objects would happily
236 * accept a valid packdata with trailing garbage,
237 * so appending garbage after we pass all the
238 * pack data is not good enough to signal
239 * breakage to downstream.
240 */
241 char *cp = data;
242 ssize_t outsz = 0;
243 if (0 <= buffered) {
244 *cp++ = buffered;
245 outsz++;
b1c71b72 246 }
4c324c00
JS
247 sz = xread(pack_objects.out, cp,
248 sizeof(data) - outsz);
249 if (0 < sz)
1456b043 250 ;
4c324c00
JS
251 else if (sz == 0) {
252 close(pack_objects.out);
253 pack_objects.out = -1;
363b7817 254 }
4c324c00
JS
255 else
256 goto fail;
257 sz += outsz;
258 if (1 < sz) {
259 buffered = data[sz-1] & 0xFF;
260 sz--;
b1c71b72 261 }
4c324c00
JS
262 else
263 buffered = -1;
fcf0fe9e 264 send_client_data(1, data, sz);
4c324c00 265 }
05e95155
JK
266
267 /*
268 * We hit the keepalive timeout without saying anything; send
269 * an empty message on the data sideband just to let the other
270 * side know we're still working on it, but don't have any data
271 * yet.
272 *
273 * If we don't have a sideband channel, there's no room in the
274 * protocol to say anything, so those clients are just out of
275 * luck.
276 */
277 if (!ret && use_sideband) {
278 static const char buf[] = "0005\1";
279 write_or_die(1, buf, 5);
280 }
4c324c00 281 }
b1c71b72 282
4c324c00 283 if (finish_command(&pack_objects)) {
7e44c935 284 error("git upload-pack: git-pack-objects died with error.");
4c324c00
JS
285 goto fail;
286 }
b1c71b72 287
4c324c00
JS
288 /* flush the data */
289 if (0 <= buffered) {
290 data[0] = buffered;
fcf0fe9e 291 send_client_data(1, data, 1);
4c324c00 292 fprintf(stderr, "flushed.\n");
b1c71b72 293 }
4c324c00
JS
294 if (use_sideband)
295 packet_flush(1);
296 return;
297
b1c71b72 298 fail:
583b7ea3 299 send_client_data(3, abort_msg, sizeof(abort_msg));
7e44c935 300 die("git upload-pack: %s", abort_msg);
fb9040cc
LT
301}
302
cf93982f 303static int got_oid(const char *hex, struct object_id *oid)
def88e9a 304{
b1e9fff7 305 struct object *o;
937a515a 306 int we_knew_they_have = 0;
b1e9fff7 307
cf93982f 308 if (get_oid_hex(hex, oid))
7e44c935 309 die("git upload-pack: expected SHA1 object, got '%s'", hex);
cf93982f 310 if (!has_object_file(oid))
937a515a 311 return -1;
b1e9fff7 312
c251c83d 313 o = parse_object(oid);
b1e9fff7 314 if (!o)
cf93982f 315 die("oops (%s)", oid_to_hex(oid));
182a8dab 316 if (o->type == OBJ_COMMIT) {
b1e9fff7 317 struct commit_list *parents;
937a515a 318 struct commit *commit = (struct commit *)o;
b1e9fff7 319 if (o->flags & THEY_HAVE)
937a515a
JH
320 we_knew_they_have = 1;
321 else
322 o->flags |= THEY_HAVE;
323 if (!oldest_have || (commit->date < oldest_have))
324 oldest_have = commit->date;
325 for (parents = commit->parents;
b1e9fff7
JH
326 parents;
327 parents = parents->next)
328 parents->item->object.flags |= THEY_HAVE;
fb9040cc 329 }
937a515a
JH
330 if (!we_knew_they_have) {
331 add_object_array(o, NULL, &have_obj);
332 return 1;
333 }
334 return 0;
335}
336
337static int reachable(struct commit *want)
338{
5411b10c 339 struct prio_queue work = { compare_commits_by_commit_date };
937a515a 340
5411b10c
JK
341 prio_queue_put(&work, want);
342 while (work.nr) {
e510ab89 343 struct commit_list *list;
5411b10c 344 struct commit *commit = prio_queue_get(&work);
937a515a
JH
345
346 if (commit->object.flags & THEY_HAVE) {
347 want->object.flags |= COMMON_KNOWN;
348 break;
349 }
350 if (!commit->object.parsed)
c251c83d 351 parse_object(&commit->object.oid);
937a515a
JH
352 if (commit->object.flags & REACHABLE)
353 continue;
354 commit->object.flags |= REACHABLE;
355 if (commit->date < oldest_have)
356 continue;
357 for (list = commit->parents; list; list = list->next) {
358 struct commit *parent = list->item;
359 if (!(parent->object.flags & REACHABLE))
5411b10c 360 prio_queue_put(&work, parent);
937a515a
JH
361 }
362 }
363 want->object.flags |= REACHABLE;
364 clear_commit_marks(want, REACHABLE);
5411b10c 365 clear_prio_queue(&work);
937a515a
JH
366 return (want->object.flags & COMMON_KNOWN);
367}
368
369static int ok_to_give_up(void)
370{
371 int i;
372
373 if (!have_obj.nr)
374 return 0;
375
376 for (i = 0; i < want_obj.nr; i++) {
377 struct object *want = want_obj.objects[i].item;
378
379 if (want->flags & COMMON_KNOWN)
380 continue;
381 want = deref_tag(want, "a want line", 0);
382 if (!want || want->type != OBJ_COMMIT) {
383 /* no way to tell if this is reachable by
384 * looking at the ancestry chain alone, so
385 * leave a note to ourselves not to worry about
386 * this object anymore.
387 */
388 want_obj.objects[i].item->flags |= COMMON_KNOWN;
389 continue;
390 }
391 if (!reachable((struct commit *)want))
392 return 0;
393 }
fb9040cc 394 return 1;
def88e9a
LT
395}
396
397static int get_common_commits(void)
398{
cf93982f 399 struct object_id oid;
400 char last_hex[GIT_MAX_HEXSZ + 1];
49bee717
SP
401 int got_common = 0;
402 int got_other = 0;
4e10cf9a 403 int sent_ready = 0;
def88e9a 404
f0243f26
JS
405 save_commit_buffer = 0;
406
eeefa7c9 407 for (;;) {
74543a04 408 char *line = packet_read_line(0, NULL);
8bf3b758
NTND
409 const char *arg;
410
960deccb 411 reset_timeout();
def88e9a 412
74543a04 413 if (!line) {
49bee717 414 if (multi_ack == 2 && got_common
4e10cf9a
JH
415 && !got_other && ok_to_give_up()) {
416 sent_ready = 1;
81c634e9 417 packet_write_fmt(1, "ACK %s ready\n", last_hex);
4e10cf9a 418 }
b1e9fff7 419 if (have_obj.nr == 0 || multi_ack)
81c634e9 420 packet_write_fmt(1, "NAK\n");
4e10cf9a
JH
421
422 if (no_done && sent_ready) {
81c634e9 423 packet_write_fmt(1, "ACK %s\n", last_hex);
4e10cf9a
JH
424 return 0;
425 }
42526b47
SP
426 if (stateless_rpc)
427 exit(0);
49bee717
SP
428 got_common = 0;
429 got_other = 0;
def88e9a
LT
430 continue;
431 }
8bf3b758 432 if (skip_prefix(line, "have ", &arg)) {
cf93982f 433 switch (got_oid(arg, &oid)) {
937a515a 434 case -1: /* they have what we do not */
49bee717 435 got_other = 1;
78affc49 436 if (multi_ack && ok_to_give_up()) {
cf93982f 437 const char *hex = oid_to_hex(&oid);
4e10cf9a
JH
438 if (multi_ack == 2) {
439 sent_ready = 1;
81c634e9 440 packet_write_fmt(1, "ACK %s ready\n", hex);
4e10cf9a 441 } else
81c634e9 442 packet_write_fmt(1, "ACK %s continue\n", hex);
78affc49 443 }
937a515a
JH
444 break;
445 default:
49bee717 446 got_common = 1;
cf93982f 447 memcpy(last_hex, oid_to_hex(&oid), 41);
78affc49 448 if (multi_ack == 2)
81c634e9 449 packet_write_fmt(1, "ACK %s common\n", last_hex);
78affc49 450 else if (multi_ack)
81c634e9 451 packet_write_fmt(1, "ACK %s continue\n", last_hex);
c04c4e57 452 else if (have_obj.nr == 1)
81c634e9 453 packet_write_fmt(1, "ACK %s\n", last_hex);
937a515a 454 break;
af2d3aa4 455 }
def88e9a
LT
456 continue;
457 }
458 if (!strcmp(line, "done")) {
b1e9fff7 459 if (have_obj.nr > 0) {
1bd8c8f0 460 if (multi_ack)
81c634e9 461 packet_write_fmt(1, "ACK %s\n", last_hex);
1bd8c8f0
JS
462 return 0;
463 }
81c634e9 464 packet_write_fmt(1, "NAK\n");
def88e9a
LT
465 return -1;
466 }
7e44c935 467 die("git upload-pack: expected SHA1 list, got '%s'", line);
def88e9a 468 }
def88e9a
LT
469}
470
390eb36b
JH
471static int is_our_ref(struct object *o)
472{
68ee6289
FM
473 int allow_hidden_ref = (allow_unadvertised_object_request &
474 (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
7199c093 475 return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
390eb36b
JH
476}
477
2997178e
NTND
478/*
479 * on successful case, it's up to the caller to close cmd->out
480 */
481static int do_reachable_revlist(struct child_process *cmd,
079aa97e
NTND
482 struct object_array *src,
483 struct object_array *reachable)
051e4005
JH
484{
485 static const char *argv[] = {
486 "rev-list", "--stdin", NULL,
487 };
051e4005
JH
488 struct object *o;
489 char namebuf[42]; /* ^ + SHA-1 + LF */
490 int i;
491
2997178e
NTND
492 cmd->argv = argv;
493 cmd->git_cmd = 1;
494 cmd->no_stderr = 1;
495 cmd->in = -1;
496 cmd->out = -1;
051e4005
JH
497
498 /*
7fcbd37f
NTND
499 * If the next rev-list --stdin encounters an unknown commit,
500 * it terminates, which will cause SIGPIPE in the write loop
051e4005
JH
501 * below.
502 */
503 sigchain_push(SIGPIPE, SIG_IGN);
504
2997178e 505 if (start_command(cmd))
7fcbd37f
NTND
506 goto error;
507
051e4005 508 namebuf[0] = '^';
cf93982f 509 namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
051e4005
JH
510 for (i = get_max_object_index(); 0 < i; ) {
511 o = get_indexed_object(--i);
2a745324
BH
512 if (!o)
513 continue;
079aa97e
NTND
514 if (reachable && o->type == OBJ_COMMIT)
515 o->flags &= ~TMP_MARK;
390eb36b 516 if (!is_our_ref(o))
051e4005 517 continue;
f2fd0760 518 memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
cf93982f 519 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
051e4005
JH
520 goto error;
521 }
cf93982f 522 namebuf[GIT_SHA1_HEXSZ] = '\n';
3f0f6624
NTND
523 for (i = 0; i < src->nr; i++) {
524 o = src->objects[i].item;
079aa97e
NTND
525 if (is_our_ref(o)) {
526 if (reachable)
527 add_object_array(o, NULL, reachable);
051e4005 528 continue;
079aa97e
NTND
529 }
530 if (reachable && o->type == OBJ_COMMIT)
531 o->flags |= TMP_MARK;
f2fd0760 532 memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
cf93982f 533 if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
051e4005
JH
534 goto error;
535 }
2997178e
NTND
536 close(cmd->in);
537 cmd->in = -1;
538 sigchain_pop(SIGPIPE);
051e4005 539
2997178e
NTND
540 return 0;
541
542error:
051e4005
JH
543 sigchain_pop(SIGPIPE);
544
2997178e
NTND
545 if (cmd->in >= 0)
546 close(cmd->in);
547 if (cmd->out >= 0)
548 close(cmd->out);
549 return -1;
550}
551
079aa97e
NTND
552static int get_reachable_list(struct object_array *src,
553 struct object_array *reachable)
554{
555 struct child_process cmd = CHILD_PROCESS_INIT;
556 int i;
557 struct object *o;
558 char namebuf[42]; /* ^ + SHA-1 + LF */
559
560 if (do_reachable_revlist(&cmd, src, reachable) < 0)
561 return -1;
562
563 while ((i = read_in_full(cmd.out, namebuf, 41)) == 41) {
564 struct object_id sha1;
565
566 if (namebuf[40] != '\n' || get_oid_hex(namebuf, &sha1))
567 break;
568
569 o = lookup_object(sha1.hash);
570 if (o && o->type == OBJ_COMMIT) {
571 o->flags &= ~TMP_MARK;
572 }
573 }
574 for (i = get_max_object_index(); 0 < i; i--) {
575 o = get_indexed_object(i - 1);
576 if (o && o->type == OBJ_COMMIT &&
577 (o->flags & TMP_MARK)) {
578 add_object_array(o, NULL, reachable);
579 o->flags &= ~TMP_MARK;
580 }
581 }
582 close(cmd.out);
583
584 if (finish_command(&cmd))
585 return -1;
586
587 return 0;
588}
589
2997178e
NTND
590static int has_unreachable(struct object_array *src)
591{
592 struct child_process cmd = CHILD_PROCESS_INIT;
593 char buf[1];
594 int i;
595
079aa97e 596 if (do_reachable_revlist(&cmd, src, NULL) < 0)
2997178e 597 return 1;
051e4005
JH
598
599 /*
600 * The commits out of the rev-list are not ancestors of
601 * our ref.
602 */
2997178e 603 i = read_in_full(cmd.out, buf, 1);
051e4005
JH
604 if (i)
605 goto error;
606 close(cmd.out);
7fcbd37f 607 cmd.out = -1;
051e4005
JH
608
609 /*
610 * rev-list may have died by encountering a bad commit
611 * in the history, in which case we do want to bail out
612 * even when it showed no commit.
613 */
614 if (finish_command(&cmd))
615 goto error;
616
617 /* All the non-tip ones are ancestors of what we advertised */
3f0f6624 618 return 0;
051e4005
JH
619
620error:
7fcbd37f 621 sigchain_pop(SIGPIPE);
7fcbd37f
NTND
622 if (cmd.out >= 0)
623 close(cmd.out);
3f0f6624
NTND
624 return 1;
625}
7fcbd37f 626
3f0f6624
NTND
627static void check_non_tip(void)
628{
629 int i;
630
631 /*
632 * In the normal in-process case without
633 * uploadpack.allowReachableSHA1InWant,
634 * non-tip requests can never happen.
635 */
636 if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
637 goto error;
638 if (!has_unreachable(&want_obj))
639 /* All the non-tip ones are ancestors of what we advertised */
640 return;
051e4005
JH
641
642error:
643 /* Pick one of them (we know there at least is one) */
644 for (i = 0; i < want_obj.nr; i++) {
3f0f6624 645 struct object *o = want_obj.objects[i].item;
390eb36b 646 if (!is_our_ref(o))
051e4005 647 die("git upload-pack: not our ref %s",
f2fd0760 648 oid_to_hex(&o->oid));
051e4005
JH
649 }
650}
651
5c24cdea
NTND
652static void send_shallow(struct commit_list *result)
653{
654 while (result) {
655 struct object *object = &result->item->object;
656 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
dbaa6bdc
JH
657 packet_write_fmt(1, "shallow %s",
658 oid_to_hex(&object->oid));
e92b848c 659 register_shallow(&object->oid);
5c24cdea
NTND
660 shallow_nr++;
661 }
662 result = result->next;
663 }
664}
665
873700c9 666static void send_unshallow(const struct object_array *shallows)
e8e44de7 667{
e8e44de7 668 int i;
873700c9 669
e8e44de7
NTND
670 for (i = 0; i < shallows->nr; i++) {
671 struct object *object = shallows->objects[i].item;
672 if (object->flags & NOT_SHALLOW) {
673 struct commit_list *parents;
dbaa6bdc
JH
674 packet_write_fmt(1, "unshallow %s",
675 oid_to_hex(&object->oid));
e8e44de7 676 object->flags &= ~CLIENT_SHALLOW;
873700c9
NTND
677 /*
678 * We want to _register_ "object" as shallow, but we
679 * also need to traverse object's parents to deepen a
680 * shallow clone. Unregister it for now so we can
681 * parse and add the parents to the want list, then
682 * re-register it.
683 */
e92b848c 684 unregister_shallow(&object->oid);
e8e44de7
NTND
685 object->parsed = 0;
686 parse_commit_or_die((struct commit *)object);
687 parents = ((struct commit *)object)->parents;
688 while (parents) {
689 add_object_array(&parents->item->object,
690 NULL, &want_obj);
691 parents = parents->next;
692 }
693 add_object_array(object, NULL, &extra_edge_obj);
694 }
695 /* make sure commit traversal conforms to client */
e92b848c 696 register_shallow(&object->oid);
e8e44de7 697 }
873700c9
NTND
698}
699
cccf74e2
NTND
700static void deepen(int depth, int deepen_relative,
701 struct object_array *shallows)
873700c9
NTND
702{
703 if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
704 int i;
705
706 for (i = 0; i < shallows->nr; i++) {
707 struct object *object = shallows->objects[i].item;
708 object->flags |= NOT_SHALLOW;
709 }
cccf74e2
NTND
710 } else if (deepen_relative) {
711 struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
712 struct commit_list *result;
713
714 get_reachable_list(shallows, &reachable_shallows);
715 result = get_shallow_commits(&reachable_shallows,
716 depth + 1,
717 SHALLOW, NOT_SHALLOW);
718 send_shallow(result);
719 free_commit_list(result);
720 object_array_clear(&reachable_shallows);
873700c9
NTND
721 } else {
722 struct commit_list *result;
723
724 result = get_shallow_commits(&want_obj, depth,
725 SHALLOW, NOT_SHALLOW);
726 send_shallow(result);
727 free_commit_list(result);
728 }
729
730 send_unshallow(shallows);
e8e44de7
NTND
731}
732
569e554b
NTND
733static void deepen_by_rev_list(int ac, const char **av,
734 struct object_array *shallows)
735{
736 struct commit_list *result;
737
738 result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
739 send_shallow(result);
740 free_commit_list(result);
741 send_unshallow(shallows);
685fbd32
BW
742}
743
744/* Returns 1 if a shallow list is sent or 0 otherwise */
745static int send_shallow_list(int depth, int deepen_rev_list,
746 timestamp_t deepen_since,
747 struct string_list *deepen_not,
748 struct object_array *shallows)
749{
750 int ret = 0;
751
752 if (depth > 0 && deepen_rev_list)
753 die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
754 if (depth > 0) {
755 deepen(depth, deepen_relative, shallows);
756 ret = 1;
757 } else if (deepen_rev_list) {
758 struct argv_array av = ARGV_ARRAY_INIT;
759 int i;
760
761 argv_array_push(&av, "rev-list");
762 if (deepen_since)
763 argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
764 if (deepen_not->nr) {
765 argv_array_push(&av, "--not");
766 for (i = 0; i < deepen_not->nr; i++) {
767 struct string_list_item *s = deepen_not->items + i;
768 argv_array_push(&av, s->string);
769 }
770 argv_array_push(&av, "--not");
771 }
772 for (i = 0; i < want_obj.nr; i++) {
773 struct object *o = want_obj.objects[i].item;
774 argv_array_push(&av, oid_to_hex(&o->oid));
775 }
776 deepen_by_rev_list(av.argc, av.argv, shallows);
777 argv_array_clear(&av);
778 ret = 1;
779 } else {
780 if (shallows->nr > 0) {
781 int i;
782 for (i = 0; i < shallows->nr; i++)
783 register_shallow(&shallows->objects[i].item->oid);
784 }
785 }
786
787 shallow_nr += shallows->nr;
788 return ret;
569e554b
NTND
789}
790
ae2948f3
BW
791static int process_shallow(const char *line, struct object_array *shallows)
792{
793 const char *arg;
794 if (skip_prefix(line, "shallow ", &arg)) {
795 struct object_id oid;
796 struct object *object;
797 if (get_oid_hex(arg, &oid))
798 die("invalid shallow line: %s", line);
799 object = parse_object(&oid);
800 if (!object)
801 return 1;
802 if (object->type != OBJ_COMMIT)
803 die("invalid shallow object %s", oid_to_hex(&oid));
804 if (!(object->flags & CLIENT_SHALLOW)) {
805 object->flags |= CLIENT_SHALLOW;
806 add_object_array(object, NULL, shallows);
807 }
808 return 1;
809 }
810
811 return 0;
812}
813
814static int process_deepen(const char *line, int *depth)
815{
816 const char *arg;
817 if (skip_prefix(line, "deepen ", &arg)) {
818 char *end = NULL;
819 *depth = (int)strtol(arg, &end, 0);
820 if (!end || *end || *depth <= 0)
821 die("Invalid deepen: %s", line);
822 return 1;
823 }
824
825 return 0;
826}
827
828static int process_deepen_since(const char *line, timestamp_t *deepen_since, int *deepen_rev_list)
829{
830 const char *arg;
831 if (skip_prefix(line, "deepen-since ", &arg)) {
832 char *end = NULL;
833 *deepen_since = parse_timestamp(arg, &end, 0);
834 if (!end || *end || !deepen_since ||
835 /* revisions.c's max_age -1 is special */
836 *deepen_since == -1)
837 die("Invalid deepen-since: %s", line);
838 *deepen_rev_list = 1;
839 return 1;
840 }
841 return 0;
842}
843
844static int process_deepen_not(const char *line, struct string_list *deepen_not, int *deepen_rev_list)
845{
846 const char *arg;
847 if (skip_prefix(line, "deepen-not ", &arg)) {
848 char *ref = NULL;
849 struct object_id oid;
850 if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
851 die("git upload-pack: ambiguous deepen-not: %s", line);
852 string_list_append(deepen_not, ref);
853 free(ref);
854 *deepen_rev_list = 1;
855 return 1;
856 }
857 return 0;
569e554b
NTND
858}
859
b1e9fff7 860static void receive_needs(void)
fb9040cc 861{
3cd47459 862 struct object_array shallows = OBJECT_ARRAY_INIT;
269a7a83 863 struct string_list deepen_not = STRING_LIST_INIT_DUP;
74543a04 864 int depth = 0;
051e4005 865 int has_non_tip = 0;
dddbad72 866 timestamp_t deepen_since = 0;
569e554b 867 int deepen_rev_list = 0;
fb9040cc 868
f0cea83f 869 shallow_nr = 0;
fb9040cc 870 for (;;) {
565ebbf7 871 struct object *o;
f47182c8 872 const char *features;
cf93982f 873 struct object_id oid_buf;
74543a04 874 char *line = packet_read_line(0, NULL);
8bf3b758
NTND
875 const char *arg;
876
960deccb 877 reset_timeout();
74543a04 878 if (!line)
ed09aef0 879 break;
e091eb93 880
ae2948f3 881 if (process_shallow(line, &shallows))
ed09aef0 882 continue;
ae2948f3 883 if (process_deepen(line, &depth))
016e6ccb 884 continue;
ae2948f3 885 if (process_deepen_since(line, &deepen_since, &deepen_rev_list))
569e554b 886 continue;
ae2948f3 887 if (process_deepen_not(line, &deepen_not, &deepen_rev_list))
269a7a83 888 continue;
ae2948f3 889
10ac85c7
JH
890 if (skip_prefix(line, "filter ", &arg)) {
891 if (!filter_capability_requested)
892 die("git upload-pack: filtering capability not negotiated");
893 parse_list_objects_filter(&filter_options, arg);
894 continue;
895 }
ea44c0a5 896
8bf3b758 897 if (!skip_prefix(line, "want ", &arg) ||
cf93982f 898 get_oid_hex(arg, &oid_buf))
7e44c935 899 die("git upload-pack: protocol error, "
e091eb93 900 "expected to get sha, not '%s'", line);
f47182c8 901
8bf3b758 902 features = arg + 40;
f47182c8 903
cccf74e2
NTND
904 if (parse_feature_request(features, "deepen-relative"))
905 deepen_relative = 1;
f47182c8 906 if (parse_feature_request(features, "multi_ack_detailed"))
78affc49 907 multi_ack = 2;
f47182c8 908 else if (parse_feature_request(features, "multi_ack"))
1bd8c8f0 909 multi_ack = 1;
f47182c8 910 if (parse_feature_request(features, "no-done"))
4e10cf9a 911 no_done = 1;
f47182c8 912 if (parse_feature_request(features, "thin-pack"))
b19696c2 913 use_thin_pack = 1;
f47182c8 914 if (parse_feature_request(features, "ofs-delta"))
e4fe4b8e 915 use_ofs_delta = 1;
f47182c8 916 if (parse_feature_request(features, "side-band-64k"))
d47f3db7 917 use_sideband = LARGE_PACKET_MAX;
f47182c8 918 else if (parse_feature_request(features, "side-band"))
d47f3db7 919 use_sideband = DEFAULT_PACKET_MAX;
f47182c8 920 if (parse_feature_request(features, "no-progress"))
b0e90897 921 no_progress = 1;
f47182c8 922 if (parse_feature_request(features, "include-tag"))
348e390b 923 use_include_tag = 1;
c7620bd0 924 if (allow_filter && parse_feature_request(features, "filter"))
10ac85c7 925 filter_capability_requested = 1;
565ebbf7 926
c251c83d 927 o = parse_object(&oid_buf);
bdb31ead
JT
928 if (!o) {
929 packet_write_fmt(1,
930 "ERR upload-pack: not our ref %s",
cf93982f 931 oid_to_hex(&oid_buf));
9f9aa761 932 die("git upload-pack: not our ref %s",
cf93982f 933 oid_to_hex(&oid_buf));
bdb31ead 934 }
565ebbf7
JH
935 if (!(o->flags & WANTED)) {
936 o->flags |= WANTED;
f8edeaa0
DT
937 if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
938 || is_our_ref(o)))
051e4005 939 has_non_tip = 1;
b1e9fff7 940 add_object_array(o, NULL, &want_obj);
565ebbf7 941 }
fb9040cc 942 }
9462e3f5 943
051e4005
JH
944 /*
945 * We have sent all our refs already, and the other end
946 * should have chosen out of them. When we are operating
947 * in the stateless RPC mode, however, their choice may
948 * have been based on the set of older refs advertised
949 * by another process that handled the initial request.
950 */
951 if (has_non_tip)
952 check_non_tip();
953
9462e3f5
JS
954 if (!use_sideband && daemon_mode)
955 no_progress = 1;
956
569e554b 957 if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
f53514bc 958 return;
569e554b 959
685fbd32
BW
960 if (send_shallow_list(depth, deepen_rev_list, deepen_since,
961 &deepen_not, &shallows))
962 packet_flush(1);
dcb572ab 963 object_array_clear(&shallows);
fb9040cc
LT
964}
965
daebaa78 966/* return non-zero if the ref is hidden, otherwise 0 */
78a766ab
LF
967static int mark_our_ref(const char *refname, const char *refname_full,
968 const struct object_id *oid)
cbbe50db 969{
363e98bf 970 struct object *o = lookup_unknown_object(oid->hash);
daebaa78 971
78a766ab 972 if (ref_is_hidden(refname, refname_full)) {
390eb36b 973 o->flags |= HIDDEN_REF;
daebaa78 974 return 1;
390eb36b 975 }
3f1da57f 976 o->flags |= OUR_REF;
cbbe50db
JH
977 return 0;
978}
979
78a766ab 980static int check_ref(const char *refname_full, const struct object_id *oid,
363e98bf 981 int flag, void *cb_data)
e172755b 982{
78a766ab
LF
983 const char *refname = strip_namespace(refname_full);
984
985 mark_our_ref(refname, refname_full, oid);
e172755b
JK
986 return 0;
987}
988
7171d8c1
JH
989static void format_symref_info(struct strbuf *buf, struct string_list *symref)
990{
991 struct string_list_item *item;
992
993 if (!symref->nr)
994 return;
995 for_each_string_list_item(item, symref)
996 strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
997}
998
363e98bf
MH
999static int send_ref(const char *refname, const struct object_id *oid,
1000 int flag, void *cb_data)
def88e9a 1001{
ed09aef0 1002 static const char *capabilities = "multi_ack thin-pack side-band"
cccf74e2
NTND
1003 " side-band-64k ofs-delta shallow deepen-since deepen-not"
1004 " deepen-relative no-progress include-tag multi_ack_detailed";
6b01ecfe 1005 const char *refname_nons = strip_namespace(refname);
21758aff 1006 struct object_id peeled;
b5b16990 1007
78a766ab 1008 if (mark_our_ref(refname_nons, refname, oid))
daebaa78 1009 return 0;
cbbe50db 1010
7171d8c1
JH
1011 if (capabilities) {
1012 struct strbuf symref_info = STRBUF_INIT;
1013
1014 format_symref_info(&symref_info, cb_data);
10ac85c7 1015 packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
363e98bf 1016 oid_to_hex(oid), refname_nons,
cf2ad8e6 1017 0, capabilities,
7199c093
FM
1018 (allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
1019 " allow-tip-sha1-in-want" : "",
68ee6289
FM
1020 (allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
1021 " allow-reachable-sha1-in-want" : "",
ff5effdf 1022 stateless_rpc ? " no-done" : "",
7171d8c1 1023 symref_info.buf,
c7620bd0 1024 allow_filter ? " filter" : "",
ff5effdf 1025 git_user_agent_sanitized());
7171d8c1
JH
1026 strbuf_release(&symref_info);
1027 } else {
81c634e9 1028 packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
7171d8c1 1029 }
1f5881bb 1030 capabilities = NULL;
b420d909 1031 if (!peel_ref(refname, &peeled))
81c634e9 1032 packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
def88e9a
LT
1033 return 0;
1034}
1035
7dabd056
MH
1036static int find_symref(const char *refname, const struct object_id *oid,
1037 int flag, void *cb_data)
7171d8c1
JH
1038{
1039 const char *symref_target;
1040 struct string_list_item *item;
7171d8c1
JH
1041
1042 if ((flag & REF_ISSYMREF) == 0)
1043 return 0;
744c040b 1044 symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
7171d8c1
JH
1045 if (!symref_target || (flag & REF_ISSYMREF) == 0)
1046 die("'%s' is a symref but it is not?", refname);
1047 item = string_list_append(cb_data, refname);
1048 item->util = xstrdup(symref_target);
1049 return 0;
1050}
1051
daebaa78
JH
1052static int upload_pack_config(const char *var, const char *value, void *unused)
1053{
7199c093
FM
1054 if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
1055 if (git_config_bool(var, value))
1056 allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
1057 else
1058 allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
68ee6289
FM
1059 } else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
1060 if (git_config_bool(var, value))
1061 allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
1062 else
1063 allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
f8edeaa0
DT
1064 } else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
1065 if (git_config_bool(var, value))
1066 allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
1067 else
1068 allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
7199c093 1069 } else if (!strcmp("uploadpack.keepalive", var)) {
05e95155
JK
1070 keepalive = git_config_int(var, value);
1071 if (!keepalive)
1072 keepalive = -1;
20b20a22
JK
1073 } else if (current_config_scope() != CONFIG_SCOPE_REPO) {
1074 if (!strcmp("uploadpack.packobjectshook", var))
1075 return git_config_string(&pack_objects_hook, var, value);
10ac85c7 1076 } else if (!strcmp("uploadpack.allowfilter", var)) {
c7620bd0 1077 allow_filter = git_config_bool(var, value);
05e95155 1078 }
daebaa78
JH
1079 return parse_hide_refs_config(var, value, "uploadpack");
1080}
1081
a3d6b53e 1082void upload_pack(struct upload_pack_options *options)
def88e9a 1083{
a3d6b53e 1084 struct string_list symref = STRING_LIST_INIT_DUP;
960deccb 1085
a3d6b53e
BW
1086 stateless_rpc = options->stateless_rpc;
1087 timeout = options->timeout;
1088 daemon_mode = options->daemon_mode;
2fb3f6db 1089
daebaa78 1090 git_config(upload_pack_config, NULL);
960deccb 1091
a3d6b53e 1092 head_ref_namespaced(find_symref, &symref);
a6080a0a 1093
a3d6b53e
BW
1094 if (options->advertise_refs || !stateless_rpc) {
1095 reset_timeout();
1096 head_ref_namespaced(send_ref, &symref);
1097 for_each_namespaced_ref(send_ref, &symref);
1098 advertise_shallow_grafts(1);
1099 packet_flush(1);
1100 } else {
1101 head_ref_namespaced(check_ref, NULL);
1102 for_each_namespaced_ref(check_ref, NULL);
aa9bab29 1103 }
a3d6b53e
BW
1104 string_list_clear(&symref, 1);
1105 if (options->advertise_refs)
1106 return;
04b33055 1107
a3d6b53e
BW
1108 receive_needs();
1109 if (want_obj.nr) {
1110 get_common_commits();
1111 create_pack_file();
1112 }
def88e9a 1113}
04b33055 1114
3145ea95
BW
1115struct upload_pack_data {
1116 struct object_array wants;
1117 struct oid_array haves;
113b9475 1118
685fbd32
BW
1119 struct object_array shallows;
1120 struct string_list deepen_not;
1121 int depth;
1122 timestamp_t deepen_since;
1123 int deepen_rev_list;
1124 int deepen_relative;
ad491366 1125
3145ea95 1126 unsigned stateless_rpc : 1;
aa9bab29 1127
3145ea95
BW
1128 unsigned use_thin_pack : 1;
1129 unsigned use_ofs_delta : 1;
1130 unsigned no_progress : 1;
1131 unsigned use_include_tag : 1;
1132 unsigned done : 1;
1133};
1134
1135static void upload_pack_data_init(struct upload_pack_data *data)
1136{
1137 struct object_array wants = OBJECT_ARRAY_INIT;
1138 struct oid_array haves = OID_ARRAY_INIT;
685fbd32
BW
1139 struct object_array shallows = OBJECT_ARRAY_INIT;
1140 struct string_list deepen_not = STRING_LIST_INIT_DUP;
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BW
1141
1142 memset(data, 0, sizeof(*data));
1143 data->wants = wants;
1144 data->haves = haves;
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BW
1145 data->shallows = shallows;
1146 data->deepen_not = deepen_not;
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BW
1147}
1148
1149static void upload_pack_data_clear(struct upload_pack_data *data)
1150{
1151 object_array_clear(&data->wants);
1152 oid_array_clear(&data->haves);
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BW
1153 object_array_clear(&data->shallows);
1154 string_list_clear(&data->deepen_not, 0);
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BW
1155}
1156
1157static int parse_want(const char *line)
1158{
1159 const char *arg;
1160 if (skip_prefix(line, "want ", &arg)) {
1161 struct object_id oid;
1162 struct object *o;
1163
1164 if (get_oid_hex(arg, &oid))
1165 die("git upload-pack: protocol error, "
1166 "expected to get oid, not '%s'", line);
1167
1168 o = parse_object(&oid);
1169 if (!o) {
1170 packet_write_fmt(1,
1171 "ERR upload-pack: not our ref %s",
1172 oid_to_hex(&oid));
1173 die("git upload-pack: not our ref %s",
1174 oid_to_hex(&oid));
1175 }
1176
1177 if (!(o->flags & WANTED)) {
1178 o->flags |= WANTED;
1179 add_object_array(o, NULL, &want_obj);
1180 }
1181
1182 return 1;
1183 }
1184
1185 return 0;
1186}
1187
1188static int parse_have(const char *line, struct oid_array *haves)
1189{
1190 const char *arg;
1191 if (skip_prefix(line, "have ", &arg)) {
1192 struct object_id oid;
1193
1194 if (get_oid_hex(arg, &oid))
1195 die("git upload-pack: expected SHA1 object, got '%s'", arg);
1196 oid_array_append(haves, &oid);
1197 return 1;
aa9bab29
BW
1198 }
1199
def88e9a
LT
1200 return 0;
1201}
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1202
1203static void process_args(struct packet_reader *request,
1204 struct upload_pack_data *data)
1205{
1206 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
1207 const char *arg = request->line;
1208
1209 /* process want */
1210 if (parse_want(arg))
1211 continue;
1212 /* process have line */
1213 if (parse_have(arg, &data->haves))
1214 continue;
1215
1216 /* process args like thin-pack */
1217 if (!strcmp(arg, "thin-pack")) {
1218 use_thin_pack = 1;
1219 continue;
1220 }
1221 if (!strcmp(arg, "ofs-delta")) {
1222 use_ofs_delta = 1;
1223 continue;
1224 }
1225 if (!strcmp(arg, "no-progress")) {
1226 no_progress = 1;
1227 continue;
1228 }
1229 if (!strcmp(arg, "include-tag")) {
1230 use_include_tag = 1;
1231 continue;
1232 }
1233 if (!strcmp(arg, "done")) {
1234 data->done = 1;
1235 continue;
1236 }
1237
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1238 /* Shallow related arguments */
1239 if (process_shallow(arg, &data->shallows))
1240 continue;
1241 if (process_deepen(arg, &data->depth))
1242 continue;
1243 if (process_deepen_since(arg, &data->deepen_since,
1244 &data->deepen_rev_list))
1245 continue;
1246 if (process_deepen_not(arg, &data->deepen_not,
1247 &data->deepen_rev_list))
1248 continue;
1249 if (!strcmp(arg, "deepen-relative")) {
1250 data->deepen_relative = 1;
1251 continue;
1252 }
1253
3145ea95 1254 /* ignore unknown lines maybe? */
7cc6ed2d 1255 die("unexpected line: '%s'", arg);
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BW
1256 }
1257}
1258
1259static int process_haves(struct oid_array *haves, struct oid_array *common)
1260{
1261 int i;
1262
1263 /* Process haves */
1264 for (i = 0; i < haves->nr; i++) {
1265 const struct object_id *oid = &haves->oid[i];
1266 struct object *o;
1267 int we_knew_they_have = 0;
1268
1269 if (!has_object_file(oid))
1270 continue;
1271
1272 oid_array_append(common, oid);
1273
1274 o = parse_object(oid);
1275 if (!o)
1276 die("oops (%s)", oid_to_hex(oid));
1277 if (o->type == OBJ_COMMIT) {
1278 struct commit_list *parents;
1279 struct commit *commit = (struct commit *)o;
1280 if (o->flags & THEY_HAVE)
1281 we_knew_they_have = 1;
1282 else
1283 o->flags |= THEY_HAVE;
1284 if (!oldest_have || (commit->date < oldest_have))
1285 oldest_have = commit->date;
1286 for (parents = commit->parents;
1287 parents;
1288 parents = parents->next)
1289 parents->item->object.flags |= THEY_HAVE;
1290 }
1291 if (!we_knew_they_have)
1292 add_object_array(o, NULL, &have_obj);
1293 }
1294
1295 return 0;
1296}
1297
1298static int send_acks(struct oid_array *acks, struct strbuf *response)
1299{
1300 int i;
1301
1302 packet_buf_write(response, "acknowledgments\n");
1303
1304 /* Send Acks */
1305 if (!acks->nr)
1306 packet_buf_write(response, "NAK\n");
1307
1308 for (i = 0; i < acks->nr; i++) {
1309 packet_buf_write(response, "ACK %s\n",
1310 oid_to_hex(&acks->oid[i]));
1311 }
1312
1313 if (ok_to_give_up()) {
1314 /* Send Ready */
1315 packet_buf_write(response, "ready\n");
1316 return 1;
1317 }
1318
1319 return 0;
1320}
1321
1322static int process_haves_and_send_acks(struct upload_pack_data *data)
1323{
1324 struct oid_array common = OID_ARRAY_INIT;
1325 struct strbuf response = STRBUF_INIT;
1326 int ret = 0;
1327
1328 process_haves(&data->haves, &common);
1329 if (data->done) {
1330 ret = 1;
1331 } else if (send_acks(&common, &response)) {
1332 packet_buf_delim(&response);
1333 ret = 1;
1334 } else {
1335 /* Add Flush */
1336 packet_buf_flush(&response);
1337 ret = 0;
1338 }
1339
1340 /* Send response */
1341 write_or_die(1, response.buf, response.len);
1342 strbuf_release(&response);
1343
1344 oid_array_clear(&data->haves);
1345 oid_array_clear(&common);
1346 return ret;
1347}
1348
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BW
1349static void send_shallow_info(struct upload_pack_data *data)
1350{
1351 /* No shallow info needs to be sent */
1352 if (!data->depth && !data->deepen_rev_list && !data->shallows.nr &&
1353 !is_repository_shallow())
1354 return;
1355
1356 packet_write_fmt(1, "shallow-info\n");
1357
1358 if (!send_shallow_list(data->depth, data->deepen_rev_list,
1359 data->deepen_since, &data->deepen_not,
1360 &data->shallows) && is_repository_shallow())
1361 deepen(INFINITE_DEPTH, data->deepen_relative, &data->shallows);
1362
1363 packet_delim(1);
1364}
1365
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BW
1366enum fetch_state {
1367 FETCH_PROCESS_ARGS = 0,
1368 FETCH_SEND_ACKS,
1369 FETCH_SEND_PACK,
1370 FETCH_DONE,
1371};
1372
1373int upload_pack_v2(struct repository *r, struct argv_array *keys,
1374 struct packet_reader *request)
1375{
1376 enum fetch_state state = FETCH_PROCESS_ARGS;
1377 struct upload_pack_data data;
1378
54592687
JT
1379 git_config(upload_pack_config, NULL);
1380
3145ea95
BW
1381 upload_pack_data_init(&data);
1382 use_sideband = LARGE_PACKET_MAX;
1383
1384 while (state != FETCH_DONE) {
1385 switch (state) {
1386 case FETCH_PROCESS_ARGS:
1387 process_args(request, &data);
1388
1389 if (!want_obj.nr) {
1390 /*
1391 * Request didn't contain any 'want' lines,
1392 * guess they didn't want anything.
1393 */
1394 state = FETCH_DONE;
1395 } else if (data.haves.nr) {
1396 /*
1397 * Request had 'have' lines, so lets ACK them.
1398 */
1399 state = FETCH_SEND_ACKS;
1400 } else {
1401 /*
1402 * Request had 'want's but no 'have's so we can
1403 * immedietly go to construct and send a pack.
1404 */
1405 state = FETCH_SEND_PACK;
1406 }
1407 break;
1408 case FETCH_SEND_ACKS:
1409 if (process_haves_and_send_acks(&data))
1410 state = FETCH_SEND_PACK;
1411 else
1412 state = FETCH_DONE;
1413 break;
1414 case FETCH_SEND_PACK:
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BW
1415 send_shallow_info(&data);
1416
3145ea95
BW
1417 packet_write_fmt(1, "packfile\n");
1418 create_pack_file();
1419 state = FETCH_DONE;
1420 break;
1421 case FETCH_DONE:
1422 continue;
1423 }
1424 }
1425
1426 upload_pack_data_clear(&data);
1427 return 0;
1428}
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BW
1429
1430int upload_pack_advertise(struct repository *r,
1431 struct strbuf *value)
1432{
1433 if (value)
1434 strbuf_addstr(value, "shallow");
1435 return 1;
1436}