pkt-line: move a misplaced comment
[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"
051e4005 13#include "sigchain.h"
ff5effdf 14#include "version.h"
daebaa78 15#include "string-list.h"
def88e9a 16
62b4698e 17static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
def88e9a 18
937a515a
JH
19/* bits #0..7 in revision.h, #8..10 in commit.c */
20#define THEY_HAVE (1u << 11)
21#define OUR_REF (1u << 12)
22#define WANTED (1u << 13)
23#define COMMON_KNOWN (1u << 14)
24#define REACHABLE (1u << 15)
25
f53514bc
JS
26#define SHALLOW (1u << 16)
27#define NOT_SHALLOW (1u << 17)
28#define CLIENT_SHALLOW (1u << 18)
29
3fbe2d54 30static unsigned long oldest_have;
937a515a 31
3f1da57f 32static int multi_ack;
4e10cf9a 33static int no_done;
348e390b 34static int use_thin_pack, use_ofs_delta, use_include_tag;
9462e3f5 35static int no_progress, daemon_mode;
f0cea83f 36static int shallow_nr;
b1e9fff7
JH
37static struct object_array have_obj;
38static struct object_array want_obj;
6523078b 39static struct object_array extra_edge_obj;
96f1e58f 40static unsigned int timeout;
d47f3db7
JH
41/* 0 for no sideband,
42 * otherwise maximum packet size (up to 65520 bytes).
43 */
96f1e58f 44static int use_sideband;
42526b47
SP
45static int advertise_refs;
46static int stateless_rpc;
960deccb
PA
47
48static void reset_timeout(void)
49{
50 alarm(timeout);
51}
fb9040cc 52
75bfc6c2
LT
53static int strip(char *line, int len)
54{
55 if (len && line[len-1] == '\n')
56 line[--len] = 0;
57 return len;
58}
59
583b7ea3
JH
60static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
61{
958c24b1 62 if (use_sideband)
d47f3db7 63 return send_sideband(1, fd, data, sz, use_sideband);
958c24b1
JH
64 if (fd == 3)
65 /* emergency quit */
66 fd = 2;
67 if (fd == 2) {
93822c22 68 /* XXX: are we happy to lose stuff here? */
958c24b1
JH
69 xwrite(fd, data, sz);
70 return sz;
583b7ea3 71 }
958c24b1 72 return safe_write(fd, data, sz);
583b7ea3
JH
73}
74
16befb8b 75static FILE *pack_pipe = NULL;
11c211fa 76static void show_commit(struct commit *commit, void *data)
9b8dc263
JS
77{
78 if (commit->object.flags & BOUNDARY)
79 fputc('-', pack_pipe);
80 if (fputs(sha1_to_hex(commit->object.sha1), pack_pipe) < 0)
81 die("broken output pipe");
82 fputc('\n', pack_pipe);
83 fflush(pack_pipe);
84 free(commit->buffer);
85 commit->buffer = NULL;
86}
87
49473672
JH
88static void show_object(struct object *obj,
89 const struct name_path *path, const char *component,
90 void *cb_data)
9b8dc263 91{
91f17516 92 show_object_with_name(pack_pipe, obj, path, component);
9b8dc263
JS
93}
94
95static void show_edge(struct commit *commit)
96{
97 fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
98}
99
1e39d7de 100static int do_rev_list(int in, int out, void *user_data)
80ccaa78
JS
101{
102 int i;
103 struct rev_info revs;
104
ae6a5609 105 pack_pipe = xfdopen(out, "w");
80ccaa78
JS
106 init_revisions(&revs, NULL);
107 revs.tag_objects = 1;
108 revs.tree_objects = 1;
109 revs.blob_objects = 1;
110 if (use_thin_pack)
111 revs.edge_hint = 1;
112
1e39d7de
NTND
113 for (i = 0; i < want_obj.nr; i++) {
114 struct object *o = want_obj.objects[i].item;
115 /* why??? */
116 o->flags &= ~UNINTERESTING;
117 add_pending_object(&revs, o, NULL);
80ccaa78 118 }
1e39d7de
NTND
119 for (i = 0; i < have_obj.nr; i++) {
120 struct object *o = have_obj.objects[i].item;
121 o->flags |= UNINTERESTING;
122 add_pending_object(&revs, o, NULL);
123 }
124 setup_revisions(0, NULL, &revs, NULL);
3d51e1b5
MK
125 if (prepare_revision_walk(&revs))
126 die("revision walk setup failed");
80ccaa78 127 mark_edges_uninteresting(revs.commits, &revs, show_edge);
6523078b
NP
128 if (use_thin_pack)
129 for (i = 0; i < extra_edge_obj.nr; i++)
130 fprintf(pack_pipe, "-%s\n", sha1_to_hex(
131 extra_edge_obj.objects[i].item->sha1));
11c211fa 132 traverse_commit_list(&revs, show_commit, show_object, NULL);
618ebe9f
JS
133 fflush(pack_pipe);
134 fclose(pack_pipe);
21edd3f1 135 return 0;
80ccaa78
JS
136}
137
fb9040cc
LT
138static void create_pack_file(void)
139{
21edd3f1 140 struct async rev_list;
cc41fa8d 141 struct child_process pack_objects;
363b7817 142 char data[8193], progress[128];
583b7ea3
JH
143 char abort_msg[] = "aborting due to possible repository "
144 "corruption on the remote side.";
b1c71b72 145 int buffered = -1;
1456b043 146 ssize_t sz;
cc41fa8d
JS
147 const char *argv[10];
148 int arg = 0;
75bfc6c2 149
b9612197
JK
150 argv[arg++] = "pack-objects";
151 if (!shallow_nr) {
f0cea83f 152 argv[arg++] = "--revs";
3f1da57f 153 if (use_thin_pack)
f0cea83f
NE
154 argv[arg++] = "--thin";
155 }
75bfc6c2 156
cc41fa8d
JS
157 argv[arg++] = "--stdout";
158 if (!no_progress)
159 argv[arg++] = "--progress";
160 if (use_ofs_delta)
161 argv[arg++] = "--delta-base-offset";
348e390b
SP
162 if (use_include_tag)
163 argv[arg++] = "--include-tag";
cc41fa8d
JS
164 argv[arg++] = NULL;
165
166 memset(&pack_objects, 0, sizeof(pack_objects));
b9612197 167 pack_objects.in = -1;
cc41fa8d
JS
168 pack_objects.out = -1;
169 pack_objects.err = -1;
170 pack_objects.git_cmd = 1;
171 pack_objects.argv = argv;
21edd3f1 172
4c324c00 173 if (start_command(&pack_objects))
7e44c935 174 die("git upload-pack: unable to fork git-pack-objects");
b1c71b72 175
b9612197
JK
176 if (shallow_nr) {
177 memset(&rev_list, 0, sizeof(rev_list));
178 rev_list.proc = do_rev_list;
179 rev_list.out = pack_objects.in;
180 if (start_async(&rev_list))
181 die("git upload-pack: unable to fork git-rev-list");
182 }
183 else {
41698375 184 FILE *pipe_fd = xfdopen(pack_objects.in, "w");
3f1da57f 185 int i;
f0cea83f 186
3f1da57f
JH
187 for (i = 0; i < want_obj.nr; i++)
188 fprintf(pipe_fd, "%s\n",
189 sha1_to_hex(want_obj.objects[i].item->sha1));
190 fprintf(pipe_fd, "--not\n");
191 for (i = 0; i < have_obj.nr; i++)
192 fprintf(pipe_fd, "%s\n",
193 sha1_to_hex(have_obj.objects[i].item->sha1));
f0cea83f
NE
194 fprintf(pipe_fd, "\n");
195 fflush(pipe_fd);
196 fclose(pipe_fd);
197 }
198
199
cc41fa8d
JS
200 /* We read from pack_objects.err to capture stderr output for
201 * progress bar, and pack_objects.out to capture the pack data.
b1c71b72 202 */
b1c71b72
JH
203
204 while (1) {
b1c71b72 205 struct pollfd pfd[2];
363b7817 206 int pe, pu, pollsize;
b1c71b72 207
0d516ada
ML
208 reset_timeout();
209
b1c71b72 210 pollsize = 0;
363b7817 211 pe = pu = -1;
b1c71b72 212
cc41fa8d
JS
213 if (0 <= pack_objects.out) {
214 pfd[pollsize].fd = pack_objects.out;
b1c71b72
JH
215 pfd[pollsize].events = POLLIN;
216 pu = pollsize;
217 pollsize++;
218 }
cc41fa8d
JS
219 if (0 <= pack_objects.err) {
220 pfd[pollsize].fd = pack_objects.err;
363b7817
JH
221 pfd[pollsize].events = POLLIN;
222 pe = pollsize;
223 pollsize++;
224 }
b1c71b72 225
4c324c00
JS
226 if (!pollsize)
227 break;
228
229 if (poll(pfd, pollsize, -1) < 0) {
230 if (errno != EINTR) {
231 error("poll failed, resuming: %s",
232 strerror(errno));
233 sleep(1);
b1c71b72 234 }
4c324c00
JS
235 continue;
236 }
6b59f51b
NP
237 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
238 /* Status ready; we ship that in the side-band
239 * or dump to the standard error.
240 */
241 sz = xread(pack_objects.err, progress,
242 sizeof(progress));
243 if (0 < sz)
244 send_client_data(2, progress, sz);
245 else if (sz == 0) {
246 close(pack_objects.err);
247 pack_objects.err = -1;
248 }
249 else
250 goto fail;
251 /* give priority to status messages */
252 continue;
253 }
4c324c00
JS
254 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
255 /* Data ready; we keep the last byte to ourselves
256 * in case we detect broken rev-list, so that we
257 * can leave the stream corrupted. This is
258 * unfortunate -- unpack-objects would happily
259 * accept a valid packdata with trailing garbage,
260 * so appending garbage after we pass all the
261 * pack data is not good enough to signal
262 * breakage to downstream.
263 */
264 char *cp = data;
265 ssize_t outsz = 0;
266 if (0 <= buffered) {
267 *cp++ = buffered;
268 outsz++;
b1c71b72 269 }
4c324c00
JS
270 sz = xread(pack_objects.out, cp,
271 sizeof(data) - outsz);
272 if (0 < sz)
1456b043 273 ;
4c324c00
JS
274 else if (sz == 0) {
275 close(pack_objects.out);
276 pack_objects.out = -1;
363b7817 277 }
4c324c00
JS
278 else
279 goto fail;
280 sz += outsz;
281 if (1 < sz) {
282 buffered = data[sz-1] & 0xFF;
283 sz--;
b1c71b72 284 }
4c324c00
JS
285 else
286 buffered = -1;
287 sz = send_client_data(1, data, sz);
288 if (sz < 0)
b1c71b72 289 goto fail;
4c324c00 290 }
4c324c00 291 }
b1c71b72 292
4c324c00 293 if (finish_command(&pack_objects)) {
7e44c935 294 error("git upload-pack: git-pack-objects died with error.");
4c324c00
JS
295 goto fail;
296 }
f0cea83f 297 if (shallow_nr && finish_async(&rev_list))
4c324c00 298 goto fail; /* error was already reported */
b1c71b72 299
4c324c00
JS
300 /* flush the data */
301 if (0 <= buffered) {
302 data[0] = buffered;
303 sz = send_client_data(1, data, 1);
304 if (sz < 0)
305 goto fail;
306 fprintf(stderr, "flushed.\n");
b1c71b72 307 }
4c324c00
JS
308 if (use_sideband)
309 packet_flush(1);
310 return;
311
b1c71b72 312 fail:
583b7ea3 313 send_client_data(3, abort_msg, sizeof(abort_msg));
7e44c935 314 die("git upload-pack: %s", abort_msg);
fb9040cc
LT
315}
316
def88e9a
LT
317static int got_sha1(char *hex, unsigned char *sha1)
318{
b1e9fff7 319 struct object *o;
937a515a 320 int we_knew_they_have = 0;
b1e9fff7 321
def88e9a 322 if (get_sha1_hex(hex, sha1))
7e44c935 323 die("git upload-pack: expected SHA1 object, got '%s'", hex);
fb9040cc 324 if (!has_sha1_file(sha1))
937a515a 325 return -1;
b1e9fff7
JH
326
327 o = lookup_object(sha1);
328 if (!(o && o->parsed))
329 o = parse_object(sha1);
330 if (!o)
331 die("oops (%s)", sha1_to_hex(sha1));
182a8dab 332 if (o->type == OBJ_COMMIT) {
b1e9fff7 333 struct commit_list *parents;
937a515a 334 struct commit *commit = (struct commit *)o;
b1e9fff7 335 if (o->flags & THEY_HAVE)
937a515a
JH
336 we_knew_they_have = 1;
337 else
338 o->flags |= THEY_HAVE;
339 if (!oldest_have || (commit->date < oldest_have))
340 oldest_have = commit->date;
341 for (parents = commit->parents;
b1e9fff7
JH
342 parents;
343 parents = parents->next)
344 parents->item->object.flags |= THEY_HAVE;
fb9040cc 345 }
937a515a
JH
346 if (!we_knew_they_have) {
347 add_object_array(o, NULL, &have_obj);
348 return 1;
349 }
350 return 0;
351}
352
353static int reachable(struct commit *want)
354{
355 struct commit_list *work = NULL;
356
47e44ed1 357 commit_list_insert_by_date(want, &work);
937a515a
JH
358 while (work) {
359 struct commit_list *list = work->next;
360 struct commit *commit = work->item;
361 free(work);
362 work = list;
363
364 if (commit->object.flags & THEY_HAVE) {
365 want->object.flags |= COMMON_KNOWN;
366 break;
367 }
368 if (!commit->object.parsed)
369 parse_object(commit->object.sha1);
370 if (commit->object.flags & REACHABLE)
371 continue;
372 commit->object.flags |= REACHABLE;
373 if (commit->date < oldest_have)
374 continue;
375 for (list = commit->parents; list; list = list->next) {
376 struct commit *parent = list->item;
377 if (!(parent->object.flags & REACHABLE))
47e44ed1 378 commit_list_insert_by_date(parent, &work);
937a515a
JH
379 }
380 }
381 want->object.flags |= REACHABLE;
382 clear_commit_marks(want, REACHABLE);
383 free_commit_list(work);
384 return (want->object.flags & COMMON_KNOWN);
385}
386
387static int ok_to_give_up(void)
388{
389 int i;
390
391 if (!have_obj.nr)
392 return 0;
393
394 for (i = 0; i < want_obj.nr; i++) {
395 struct object *want = want_obj.objects[i].item;
396
397 if (want->flags & COMMON_KNOWN)
398 continue;
399 want = deref_tag(want, "a want line", 0);
400 if (!want || want->type != OBJ_COMMIT) {
401 /* no way to tell if this is reachable by
402 * looking at the ancestry chain alone, so
403 * leave a note to ourselves not to worry about
404 * this object anymore.
405 */
406 want_obj.objects[i].item->flags |= COMMON_KNOWN;
407 continue;
408 }
409 if (!reachable((struct commit *)want))
410 return 0;
411 }
fb9040cc 412 return 1;
def88e9a
LT
413}
414
415static int get_common_commits(void)
416{
417 static char line[1000];
c04c4e57 418 unsigned char sha1[20];
78affc49 419 char last_hex[41];
49bee717
SP
420 int got_common = 0;
421 int got_other = 0;
4e10cf9a 422 int sent_ready = 0;
def88e9a 423
f0243f26
JS
424 save_commit_buffer = 0;
425
eeefa7c9 426 for (;;) {
fd13b21f 427 int len = packet_read_line(0, line, sizeof(line));
960deccb 428 reset_timeout();
def88e9a
LT
429
430 if (!len) {
49bee717 431 if (multi_ack == 2 && got_common
4e10cf9a
JH
432 && !got_other && ok_to_give_up()) {
433 sent_ready = 1;
49bee717 434 packet_write(1, "ACK %s ready\n", last_hex);
4e10cf9a 435 }
b1e9fff7 436 if (have_obj.nr == 0 || multi_ack)
1bd8c8f0 437 packet_write(1, "NAK\n");
4e10cf9a
JH
438
439 if (no_done && sent_ready) {
440 packet_write(1, "ACK %s\n", last_hex);
441 return 0;
442 }
42526b47
SP
443 if (stateless_rpc)
444 exit(0);
49bee717
SP
445 got_common = 0;
446 got_other = 0;
def88e9a
LT
447 continue;
448 }
fd13b21f 449 strip(line, len);
cc44c765 450 if (!prefixcmp(line, "have ")) {
937a515a
JH
451 switch (got_sha1(line+5, sha1)) {
452 case -1: /* they have what we do not */
49bee717 453 got_other = 1;
78affc49
SP
454 if (multi_ack && ok_to_give_up()) {
455 const char *hex = sha1_to_hex(sha1);
4e10cf9a
JH
456 if (multi_ack == 2) {
457 sent_ready = 1;
78affc49 458 packet_write(1, "ACK %s ready\n", hex);
4e10cf9a 459 } else
78affc49
SP
460 packet_write(1, "ACK %s continue\n", hex);
461 }
937a515a
JH
462 break;
463 default:
49bee717 464 got_common = 1;
78affc49
SP
465 memcpy(last_hex, sha1_to_hex(sha1), 41);
466 if (multi_ack == 2)
467 packet_write(1, "ACK %s common\n", last_hex);
468 else if (multi_ack)
469 packet_write(1, "ACK %s continue\n", last_hex);
c04c4e57 470 else if (have_obj.nr == 1)
78affc49 471 packet_write(1, "ACK %s\n", last_hex);
937a515a 472 break;
af2d3aa4 473 }
def88e9a
LT
474 continue;
475 }
476 if (!strcmp(line, "done")) {
b1e9fff7 477 if (have_obj.nr > 0) {
1bd8c8f0 478 if (multi_ack)
c04c4e57 479 packet_write(1, "ACK %s\n", last_hex);
1bd8c8f0
JS
480 return 0;
481 }
def88e9a
LT
482 packet_write(1, "NAK\n");
483 return -1;
484 }
7e44c935 485 die("git upload-pack: expected SHA1 list, got '%s'", line);
def88e9a 486 }
def88e9a
LT
487}
488
051e4005
JH
489static void check_non_tip(void)
490{
491 static const char *argv[] = {
492 "rev-list", "--stdin", NULL,
493 };
494 static struct child_process cmd;
495 struct object *o;
496 char namebuf[42]; /* ^ + SHA-1 + LF */
497 int i;
498
499 /* In the normal in-process case non-tip request can never happen */
500 if (!stateless_rpc)
501 goto error;
502
503 cmd.argv = argv;
504 cmd.git_cmd = 1;
505 cmd.no_stderr = 1;
506 cmd.in = -1;
507 cmd.out = -1;
508
509 if (start_command(&cmd))
510 goto error;
511
512 /*
513 * If rev-list --stdin encounters an unknown commit, it
514 * terminates, which will cause SIGPIPE in the write loop
515 * below.
516 */
517 sigchain_push(SIGPIPE, SIG_IGN);
518
519 namebuf[0] = '^';
520 namebuf[41] = '\n';
521 for (i = get_max_object_index(); 0 < i; ) {
522 o = get_indexed_object(--i);
2a745324
BH
523 if (!o)
524 continue;
051e4005
JH
525 if (!(o->flags & OUR_REF))
526 continue;
527 memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);
528 if (write_in_full(cmd.in, namebuf, 42) < 0)
529 goto error;
530 }
531 namebuf[40] = '\n';
532 for (i = 0; i < want_obj.nr; i++) {
533 o = want_obj.objects[i].item;
534 if (o->flags & OUR_REF)
535 continue;
536 memcpy(namebuf, sha1_to_hex(o->sha1), 40);
537 if (write_in_full(cmd.in, namebuf, 41) < 0)
538 goto error;
539 }
540 close(cmd.in);
541
542 sigchain_pop(SIGPIPE);
543
544 /*
545 * The commits out of the rev-list are not ancestors of
546 * our ref.
547 */
548 i = read_in_full(cmd.out, namebuf, 1);
549 if (i)
550 goto error;
551 close(cmd.out);
552
553 /*
554 * rev-list may have died by encountering a bad commit
555 * in the history, in which case we do want to bail out
556 * even when it showed no commit.
557 */
558 if (finish_command(&cmd))
559 goto error;
560
561 /* All the non-tip ones are ancestors of what we advertised */
562 return;
563
564error:
565 /* Pick one of them (we know there at least is one) */
566 for (i = 0; i < want_obj.nr; i++) {
567 o = want_obj.objects[i].item;
568 if (!(o->flags & OUR_REF))
569 die("git upload-pack: not our ref %s",
570 sha1_to_hex(o->sha1));
571 }
572}
573
b1e9fff7 574static void receive_needs(void)
fb9040cc 575{
3cd47459 576 struct object_array shallows = OBJECT_ARRAY_INIT;
fb9040cc 577 static char line[1000];
016e6ccb 578 int len, depth = 0;
051e4005 579 int has_non_tip = 0;
fb9040cc 580
f0cea83f 581 shallow_nr = 0;
fb9040cc 582 for (;;) {
565ebbf7 583 struct object *o;
f47182c8 584 const char *features;
6ece0d30 585 unsigned char sha1_buf[20];
fb9040cc 586 len = packet_read_line(0, line, sizeof(line));
960deccb 587 reset_timeout();
fb9040cc 588 if (!len)
ed09aef0 589 break;
e091eb93 590
599065a3 591 if (!prefixcmp(line, "shallow ")) {
ed09aef0
JS
592 unsigned char sha1[20];
593 struct object *object;
b7b02170 594 if (get_sha1_hex(line + 8, sha1))
ed09aef0
JS
595 die("invalid shallow line: %s", line);
596 object = parse_object(sha1);
597 if (!object)
598 die("did not find object for %s", line);
6293ded3
NTND
599 if (object->type != OBJ_COMMIT)
600 die("invalid shallow object %s", sha1_to_hex(sha1));
e58e57e4
JK
601 if (!(object->flags & CLIENT_SHALLOW)) {
602 object->flags |= CLIENT_SHALLOW;
603 add_object_array(object, NULL, &shallows);
604 }
ed09aef0
JS
605 continue;
606 }
599065a3 607 if (!prefixcmp(line, "deepen ")) {
016e6ccb
JS
608 char *end;
609 depth = strtol(line + 7, &end, 0);
610 if (end == line + 7 || depth <= 0)
611 die("Invalid deepen: %s", line);
612 continue;
613 }
599065a3 614 if (prefixcmp(line, "want ") ||
6ece0d30 615 get_sha1_hex(line+5, sha1_buf))
7e44c935 616 die("git upload-pack: protocol error, "
e091eb93 617 "expected to get sha, not '%s'", line);
f47182c8
JH
618
619 features = line + 45;
620
621 if (parse_feature_request(features, "multi_ack_detailed"))
78affc49 622 multi_ack = 2;
f47182c8 623 else if (parse_feature_request(features, "multi_ack"))
1bd8c8f0 624 multi_ack = 1;
f47182c8 625 if (parse_feature_request(features, "no-done"))
4e10cf9a 626 no_done = 1;
f47182c8 627 if (parse_feature_request(features, "thin-pack"))
b19696c2 628 use_thin_pack = 1;
f47182c8 629 if (parse_feature_request(features, "ofs-delta"))
e4fe4b8e 630 use_ofs_delta = 1;
f47182c8 631 if (parse_feature_request(features, "side-band-64k"))
d47f3db7 632 use_sideband = LARGE_PACKET_MAX;
f47182c8 633 else if (parse_feature_request(features, "side-band"))
d47f3db7 634 use_sideband = DEFAULT_PACKET_MAX;
f47182c8 635 if (parse_feature_request(features, "no-progress"))
b0e90897 636 no_progress = 1;
f47182c8 637 if (parse_feature_request(features, "include-tag"))
348e390b 638 use_include_tag = 1;
565ebbf7 639
565ebbf7 640 o = lookup_object(sha1_buf);
051e4005 641 if (!o)
9f9aa761
EN
642 die("git upload-pack: not our ref %s",
643 sha1_to_hex(sha1_buf));
565ebbf7
JH
644 if (!(o->flags & WANTED)) {
645 o->flags |= WANTED;
051e4005
JH
646 if (!(o->flags & OUR_REF))
647 has_non_tip = 1;
b1e9fff7 648 add_object_array(o, NULL, &want_obj);
565ebbf7 649 }
fb9040cc 650 }
9462e3f5 651
051e4005
JH
652 /*
653 * We have sent all our refs already, and the other end
654 * should have chosen out of them. When we are operating
655 * in the stateless RPC mode, however, their choice may
656 * have been based on the set of older refs advertised
657 * by another process that handled the initial request.
658 */
659 if (has_non_tip)
660 check_non_tip();
661
9462e3f5
JS
662 if (!use_sideband && daemon_mode)
663 no_progress = 1;
664
f53514bc
JS
665 if (depth == 0 && shallows.nr == 0)
666 return;
016e6ccb 667 if (depth > 0) {
4dcb167f 668 struct commit_list *result = NULL, *backup = NULL;
f53514bc 669 int i;
4dcb167f
NTND
670 if (depth == INFINITE_DEPTH)
671 for (i = 0; i < shallows.nr; i++) {
672 struct object *object = shallows.objects[i].item;
673 object->flags |= NOT_SHALLOW;
674 }
675 else
676 backup = result =
677 get_shallow_commits(&want_obj, depth,
678 SHALLOW, NOT_SHALLOW);
016e6ccb 679 while (result) {
f53514bc 680 struct object *object = &result->item->object;
1f2de769 681 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
f53514bc
JS
682 packet_write(1, "shallow %s",
683 sha1_to_hex(object->sha1));
684 register_shallow(object->sha1);
f0cea83f 685 shallow_nr++;
f53514bc 686 }
016e6ccb
JS
687 result = result->next;
688 }
689 free_commit_list(backup);
f53514bc
JS
690 for (i = 0; i < shallows.nr; i++) {
691 struct object *object = shallows.objects[i].item;
692 if (object->flags & NOT_SHALLOW) {
693 struct commit_list *parents;
694 packet_write(1, "unshallow %s",
695 sha1_to_hex(object->sha1));
696 object->flags &= ~CLIENT_SHALLOW;
697 /* make sure the real parents are parsed */
698 unregister_shallow(object->sha1);
176d45cb 699 object->parsed = 0;
dec38c81
MK
700 if (parse_commit((struct commit *)object))
701 die("invalid commit");
f53514bc
JS
702 parents = ((struct commit *)object)->parents;
703 while (parents) {
704 add_object_array(&parents->item->object,
705 NULL, &want_obj);
706 parents = parents->next;
707 }
6523078b 708 add_object_array(object, NULL, &extra_edge_obj);
f53514bc
JS
709 }
710 /* make sure commit traversal conforms to client */
711 register_shallow(object->sha1);
712 }
713 packet_flush(1);
714 } else
715 if (shallows.nr > 0) {
716 int i;
717 for (i = 0; i < shallows.nr; i++)
718 register_shallow(shallows.objects[i].item->sha1);
719 }
f0cea83f
NE
720
721 shallow_nr += shallows.nr;
f53514bc 722 free(shallows.objects);
fb9040cc
LT
723}
724
daebaa78 725/* return non-zero if the ref is hidden, otherwise 0 */
cbbe50db
JH
726static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
727{
728 struct object *o = lookup_unknown_object(sha1);
daebaa78
JH
729
730 if (ref_is_hidden(refname))
731 return 1;
cbbe50db
JH
732 if (!o)
733 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
3f1da57f 734 o->flags |= OUR_REF;
cbbe50db
JH
735 return 0;
736}
737
8da19775 738static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
def88e9a 739{
ed09aef0 740 static const char *capabilities = "multi_ack thin-pack side-band"
348e390b 741 " side-band-64k ofs-delta shallow no-progress"
78affc49 742 " include-tag multi_ack_detailed";
6b01ecfe 743 const char *refname_nons = strip_namespace(refname);
435c8332 744 unsigned char peeled[20];
b5b16990 745
daebaa78
JH
746 if (mark_our_ref(refname, sha1, flag, cb_data))
747 return 0;
cbbe50db 748
1f5881bb 749 if (capabilities)
ff5effdf
JK
750 packet_write(1, "%s %s%c%s%s agent=%s\n",
751 sha1_to_hex(sha1), refname_nons,
cf2ad8e6 752 0, capabilities,
ff5effdf
JK
753 stateless_rpc ? " no-done" : "",
754 git_user_agent_sanitized());
1f5881bb 755 else
6b01ecfe 756 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
1f5881bb 757 capabilities = NULL;
435c8332
JK
758 if (!peel_ref(refname, peeled))
759 packet_write(1, "%s %s^{}\n", sha1_to_hex(peeled), refname_nons);
def88e9a
LT
760 return 0;
761}
762
59076eba 763static void upload_pack(void)
def88e9a 764{
42526b47
SP
765 if (advertise_refs || !stateless_rpc) {
766 reset_timeout();
6b01ecfe
JT
767 head_ref_namespaced(send_ref, NULL);
768 for_each_namespaced_ref(send_ref, NULL);
42526b47
SP
769 packet_flush(1);
770 } else {
6b01ecfe
JT
771 head_ref_namespaced(mark_our_ref, NULL);
772 for_each_namespaced_ref(mark_our_ref, NULL);
42526b47
SP
773 }
774 if (advertise_refs)
775 return;
776
b1e9fff7 777 receive_needs();
59076eba
DR
778 if (want_obj.nr) {
779 get_common_commits();
780 create_pack_file();
781 }
def88e9a
LT
782}
783
daebaa78
JH
784static int upload_pack_config(const char *var, const char *value, void *unused)
785{
786 return parse_hide_refs_config(var, value, "uploadpack");
787}
788
def88e9a
LT
789int main(int argc, char **argv)
790{
8d630132 791 char *dir;
960deccb
PA
792 int i;
793 int strict = 0;
794
5e9637c6
ÆAB
795 git_setup_gettext();
796
bbc30f99 797 packet_trace_identity("upload-pack");
2fb3f6db 798 git_extract_argv0_path(argv[0]);
dae556bd 799 read_replace_refs = 0;
2fb3f6db 800
960deccb
PA
801 for (i = 1; i < argc; i++) {
802 char *arg = argv[i];
803
804 if (arg[0] != '-')
805 break;
42526b47
SP
806 if (!strcmp(arg, "--advertise-refs")) {
807 advertise_refs = 1;
808 continue;
809 }
810 if (!strcmp(arg, "--stateless-rpc")) {
811 stateless_rpc = 1;
812 continue;
813 }
960deccb
PA
814 if (!strcmp(arg, "--strict")) {
815 strict = 1;
816 continue;
817 }
cc44c765 818 if (!prefixcmp(arg, "--timeout=")) {
960deccb 819 timeout = atoi(arg+10);
9462e3f5 820 daemon_mode = 1;
960deccb
PA
821 continue;
822 }
823 if (!strcmp(arg, "--")) {
824 i++;
825 break;
826 }
827 }
a6080a0a 828
960deccb 829 if (i != argc-1)
def88e9a 830 usage(upload_pack_usage);
04b33055 831
e1464ca7 832 setup_path();
04b33055 833
960deccb 834 dir = argv[i];
113b9475 835
8d630132 836 if (!enter_repo(dir, strict))
05ac6b34 837 die("'%s' does not appear to be a git repository", dir);
a0022eeb
JH
838 if (is_repository_shallow())
839 die("attempt to fetch/clone from a shallow repository");
daebaa78 840 git_config(upload_pack_config, NULL);
def88e9a
LT
841 upload_pack();
842 return 0;
843}