include agent identifier in capability string
[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"
def88e9a 15
62b4698e 16static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
def88e9a 17
937a515a
JH
18/* bits #0..7 in revision.h, #8..10 in commit.c */
19#define THEY_HAVE (1u << 11)
20#define OUR_REF (1u << 12)
21#define WANTED (1u << 13)
22#define COMMON_KNOWN (1u << 14)
23#define REACHABLE (1u << 15)
24
f53514bc
JS
25#define SHALLOW (1u << 16)
26#define NOT_SHALLOW (1u << 17)
27#define CLIENT_SHALLOW (1u << 18)
28
3fbe2d54 29static unsigned long oldest_have;
937a515a 30
96f1e58f 31static int multi_ack, nr_our_refs;
4e10cf9a 32static int no_done;
348e390b 33static int use_thin_pack, use_ofs_delta, use_include_tag;
9462e3f5 34static int no_progress, daemon_mode;
f0cea83f 35static int shallow_nr;
b1e9fff7
JH
36static struct object_array have_obj;
37static struct object_array want_obj;
6523078b 38static struct object_array extra_edge_obj;
96f1e58f 39static unsigned int timeout;
d47f3db7
JH
40/* 0 for no sideband,
41 * otherwise maximum packet size (up to 65520 bytes).
42 */
96f1e58f 43static int use_sideband;
49aaddd1 44static int debug_fd;
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;
b1e9fff7 142 int create_full_pack = (nr_our_refs == want_obj.nr && !have_obj.nr);
363b7817 143 char data[8193], progress[128];
583b7ea3
JH
144 char abort_msg[] = "aborting due to possible repository "
145 "corruption on the remote side.";
b1c71b72 146 int buffered = -1;
1456b043 147 ssize_t sz;
cc41fa8d
JS
148 const char *argv[10];
149 int arg = 0;
75bfc6c2 150
b9612197
JK
151 argv[arg++] = "pack-objects";
152 if (!shallow_nr) {
f0cea83f
NE
153 argv[arg++] = "--revs";
154 if (create_full_pack)
155 argv[arg++] = "--all";
156 else if (use_thin_pack)
157 argv[arg++] = "--thin";
158 }
75bfc6c2 159
cc41fa8d
JS
160 argv[arg++] = "--stdout";
161 if (!no_progress)
162 argv[arg++] = "--progress";
163 if (use_ofs_delta)
164 argv[arg++] = "--delta-base-offset";
348e390b
SP
165 if (use_include_tag)
166 argv[arg++] = "--include-tag";
cc41fa8d
JS
167 argv[arg++] = NULL;
168
169 memset(&pack_objects, 0, sizeof(pack_objects));
b9612197 170 pack_objects.in = -1;
cc41fa8d
JS
171 pack_objects.out = -1;
172 pack_objects.err = -1;
173 pack_objects.git_cmd = 1;
174 pack_objects.argv = argv;
21edd3f1 175
4c324c00 176 if (start_command(&pack_objects))
7e44c935 177 die("git upload-pack: unable to fork git-pack-objects");
b1c71b72 178
b9612197
JK
179 if (shallow_nr) {
180 memset(&rev_list, 0, sizeof(rev_list));
181 rev_list.proc = do_rev_list;
182 rev_list.out = pack_objects.in;
183 if (start_async(&rev_list))
184 die("git upload-pack: unable to fork git-rev-list");
185 }
186 else {
41698375 187 FILE *pipe_fd = xfdopen(pack_objects.in, "w");
f0cea83f
NE
188 if (!create_full_pack) {
189 int i;
190 for (i = 0; i < want_obj.nr; i++)
191 fprintf(pipe_fd, "%s\n", sha1_to_hex(want_obj.objects[i].item->sha1));
192 fprintf(pipe_fd, "--not\n");
193 for (i = 0; i < have_obj.nr; i++)
194 fprintf(pipe_fd, "%s\n", sha1_to_hex(have_obj.objects[i].item->sha1));
195 }
196
197 fprintf(pipe_fd, "\n");
198 fflush(pipe_fd);
199 fclose(pipe_fd);
200 }
201
202
cc41fa8d
JS
203 /* We read from pack_objects.err to capture stderr output for
204 * progress bar, and pack_objects.out to capture the pack data.
b1c71b72 205 */
b1c71b72
JH
206
207 while (1) {
b1c71b72 208 struct pollfd pfd[2];
363b7817 209 int pe, pu, pollsize;
b1c71b72 210
0d516ada
ML
211 reset_timeout();
212
b1c71b72 213 pollsize = 0;
363b7817 214 pe = pu = -1;
b1c71b72 215
cc41fa8d
JS
216 if (0 <= pack_objects.out) {
217 pfd[pollsize].fd = pack_objects.out;
b1c71b72
JH
218 pfd[pollsize].events = POLLIN;
219 pu = pollsize;
220 pollsize++;
221 }
cc41fa8d
JS
222 if (0 <= pack_objects.err) {
223 pfd[pollsize].fd = pack_objects.err;
363b7817
JH
224 pfd[pollsize].events = POLLIN;
225 pe = pollsize;
226 pollsize++;
227 }
b1c71b72 228
4c324c00
JS
229 if (!pollsize)
230 break;
231
232 if (poll(pfd, pollsize, -1) < 0) {
233 if (errno != EINTR) {
234 error("poll failed, resuming: %s",
235 strerror(errno));
236 sleep(1);
b1c71b72 237 }
4c324c00
JS
238 continue;
239 }
6b59f51b
NP
240 if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
241 /* Status ready; we ship that in the side-band
242 * or dump to the standard error.
243 */
244 sz = xread(pack_objects.err, progress,
245 sizeof(progress));
246 if (0 < sz)
247 send_client_data(2, progress, sz);
248 else if (sz == 0) {
249 close(pack_objects.err);
250 pack_objects.err = -1;
251 }
252 else
253 goto fail;
254 /* give priority to status messages */
255 continue;
256 }
4c324c00
JS
257 if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
258 /* Data ready; we keep the last byte to ourselves
259 * in case we detect broken rev-list, so that we
260 * can leave the stream corrupted. This is
261 * unfortunate -- unpack-objects would happily
262 * accept a valid packdata with trailing garbage,
263 * so appending garbage after we pass all the
264 * pack data is not good enough to signal
265 * breakage to downstream.
266 */
267 char *cp = data;
268 ssize_t outsz = 0;
269 if (0 <= buffered) {
270 *cp++ = buffered;
271 outsz++;
b1c71b72 272 }
4c324c00
JS
273 sz = xread(pack_objects.out, cp,
274 sizeof(data) - outsz);
275 if (0 < sz)
1456b043 276 ;
4c324c00
JS
277 else if (sz == 0) {
278 close(pack_objects.out);
279 pack_objects.out = -1;
363b7817 280 }
4c324c00
JS
281 else
282 goto fail;
283 sz += outsz;
284 if (1 < sz) {
285 buffered = data[sz-1] & 0xFF;
286 sz--;
b1c71b72 287 }
4c324c00
JS
288 else
289 buffered = -1;
290 sz = send_client_data(1, data, sz);
291 if (sz < 0)
b1c71b72 292 goto fail;
4c324c00 293 }
4c324c00 294 }
b1c71b72 295
4c324c00 296 if (finish_command(&pack_objects)) {
7e44c935 297 error("git upload-pack: git-pack-objects died with error.");
4c324c00
JS
298 goto fail;
299 }
f0cea83f 300 if (shallow_nr && finish_async(&rev_list))
4c324c00 301 goto fail; /* error was already reported */
b1c71b72 302
4c324c00
JS
303 /* flush the data */
304 if (0 <= buffered) {
305 data[0] = buffered;
306 sz = send_client_data(1, data, 1);
307 if (sz < 0)
308 goto fail;
309 fprintf(stderr, "flushed.\n");
b1c71b72 310 }
4c324c00
JS
311 if (use_sideband)
312 packet_flush(1);
313 return;
314
b1c71b72 315 fail:
583b7ea3 316 send_client_data(3, abort_msg, sizeof(abort_msg));
7e44c935 317 die("git upload-pack: %s", abort_msg);
fb9040cc
LT
318}
319
def88e9a
LT
320static int got_sha1(char *hex, unsigned char *sha1)
321{
b1e9fff7 322 struct object *o;
937a515a 323 int we_knew_they_have = 0;
b1e9fff7 324
def88e9a 325 if (get_sha1_hex(hex, sha1))
7e44c935 326 die("git upload-pack: expected SHA1 object, got '%s'", hex);
fb9040cc 327 if (!has_sha1_file(sha1))
937a515a 328 return -1;
b1e9fff7
JH
329
330 o = lookup_object(sha1);
331 if (!(o && o->parsed))
332 o = parse_object(sha1);
333 if (!o)
334 die("oops (%s)", sha1_to_hex(sha1));
182a8dab 335 if (o->type == OBJ_COMMIT) {
b1e9fff7 336 struct commit_list *parents;
937a515a 337 struct commit *commit = (struct commit *)o;
b1e9fff7 338 if (o->flags & THEY_HAVE)
937a515a
JH
339 we_knew_they_have = 1;
340 else
341 o->flags |= THEY_HAVE;
342 if (!oldest_have || (commit->date < oldest_have))
343 oldest_have = commit->date;
344 for (parents = commit->parents;
b1e9fff7
JH
345 parents;
346 parents = parents->next)
347 parents->item->object.flags |= THEY_HAVE;
fb9040cc 348 }
937a515a
JH
349 if (!we_knew_they_have) {
350 add_object_array(o, NULL, &have_obj);
351 return 1;
352 }
353 return 0;
354}
355
356static int reachable(struct commit *want)
357{
358 struct commit_list *work = NULL;
359
47e44ed1 360 commit_list_insert_by_date(want, &work);
937a515a
JH
361 while (work) {
362 struct commit_list *list = work->next;
363 struct commit *commit = work->item;
364 free(work);
365 work = list;
366
367 if (commit->object.flags & THEY_HAVE) {
368 want->object.flags |= COMMON_KNOWN;
369 break;
370 }
371 if (!commit->object.parsed)
372 parse_object(commit->object.sha1);
373 if (commit->object.flags & REACHABLE)
374 continue;
375 commit->object.flags |= REACHABLE;
376 if (commit->date < oldest_have)
377 continue;
378 for (list = commit->parents; list; list = list->next) {
379 struct commit *parent = list->item;
380 if (!(parent->object.flags & REACHABLE))
47e44ed1 381 commit_list_insert_by_date(parent, &work);
937a515a
JH
382 }
383 }
384 want->object.flags |= REACHABLE;
385 clear_commit_marks(want, REACHABLE);
386 free_commit_list(work);
387 return (want->object.flags & COMMON_KNOWN);
388}
389
390static int ok_to_give_up(void)
391{
392 int i;
393
394 if (!have_obj.nr)
395 return 0;
396
397 for (i = 0; i < want_obj.nr; i++) {
398 struct object *want = want_obj.objects[i].item;
399
400 if (want->flags & COMMON_KNOWN)
401 continue;
402 want = deref_tag(want, "a want line", 0);
403 if (!want || want->type != OBJ_COMMIT) {
404 /* no way to tell if this is reachable by
405 * looking at the ancestry chain alone, so
406 * leave a note to ourselves not to worry about
407 * this object anymore.
408 */
409 want_obj.objects[i].item->flags |= COMMON_KNOWN;
410 continue;
411 }
412 if (!reachable((struct commit *)want))
413 return 0;
414 }
fb9040cc 415 return 1;
def88e9a
LT
416}
417
418static int get_common_commits(void)
419{
420 static char line[1000];
c04c4e57 421 unsigned char sha1[20];
78affc49 422 char last_hex[41];
49bee717
SP
423 int got_common = 0;
424 int got_other = 0;
4e10cf9a 425 int sent_ready = 0;
def88e9a 426
f0243f26
JS
427 save_commit_buffer = 0;
428
eeefa7c9 429 for (;;) {
fd13b21f 430 int len = packet_read_line(0, line, sizeof(line));
960deccb 431 reset_timeout();
def88e9a
LT
432
433 if (!len) {
49bee717 434 if (multi_ack == 2 && got_common
4e10cf9a
JH
435 && !got_other && ok_to_give_up()) {
436 sent_ready = 1;
49bee717 437 packet_write(1, "ACK %s ready\n", last_hex);
4e10cf9a 438 }
b1e9fff7 439 if (have_obj.nr == 0 || multi_ack)
1bd8c8f0 440 packet_write(1, "NAK\n");
4e10cf9a
JH
441
442 if (no_done && sent_ready) {
443 packet_write(1, "ACK %s\n", last_hex);
444 return 0;
445 }
42526b47
SP
446 if (stateless_rpc)
447 exit(0);
49bee717
SP
448 got_common = 0;
449 got_other = 0;
def88e9a
LT
450 continue;
451 }
fd13b21f 452 strip(line, len);
cc44c765 453 if (!prefixcmp(line, "have ")) {
937a515a
JH
454 switch (got_sha1(line+5, sha1)) {
455 case -1: /* they have what we do not */
49bee717 456 got_other = 1;
78affc49
SP
457 if (multi_ack && ok_to_give_up()) {
458 const char *hex = sha1_to_hex(sha1);
4e10cf9a
JH
459 if (multi_ack == 2) {
460 sent_ready = 1;
78affc49 461 packet_write(1, "ACK %s ready\n", hex);
4e10cf9a 462 } else
78affc49
SP
463 packet_write(1, "ACK %s continue\n", hex);
464 }
937a515a
JH
465 break;
466 default:
49bee717 467 got_common = 1;
78affc49
SP
468 memcpy(last_hex, sha1_to_hex(sha1), 41);
469 if (multi_ack == 2)
470 packet_write(1, "ACK %s common\n", last_hex);
471 else if (multi_ack)
472 packet_write(1, "ACK %s continue\n", last_hex);
c04c4e57 473 else if (have_obj.nr == 1)
78affc49 474 packet_write(1, "ACK %s\n", last_hex);
937a515a 475 break;
af2d3aa4 476 }
def88e9a
LT
477 continue;
478 }
479 if (!strcmp(line, "done")) {
b1e9fff7 480 if (have_obj.nr > 0) {
1bd8c8f0 481 if (multi_ack)
c04c4e57 482 packet_write(1, "ACK %s\n", last_hex);
1bd8c8f0
JS
483 return 0;
484 }
def88e9a
LT
485 packet_write(1, "NAK\n");
486 return -1;
487 }
7e44c935 488 die("git upload-pack: expected SHA1 list, got '%s'", line);
def88e9a 489 }
def88e9a
LT
490}
491
051e4005
JH
492static void check_non_tip(void)
493{
494 static const char *argv[] = {
495 "rev-list", "--stdin", NULL,
496 };
497 static struct child_process cmd;
498 struct object *o;
499 char namebuf[42]; /* ^ + SHA-1 + LF */
500 int i;
501
502 /* In the normal in-process case non-tip request can never happen */
503 if (!stateless_rpc)
504 goto error;
505
506 cmd.argv = argv;
507 cmd.git_cmd = 1;
508 cmd.no_stderr = 1;
509 cmd.in = -1;
510 cmd.out = -1;
511
512 if (start_command(&cmd))
513 goto error;
514
515 /*
516 * If rev-list --stdin encounters an unknown commit, it
517 * terminates, which will cause SIGPIPE in the write loop
518 * below.
519 */
520 sigchain_push(SIGPIPE, SIG_IGN);
521
522 namebuf[0] = '^';
523 namebuf[41] = '\n';
524 for (i = get_max_object_index(); 0 < i; ) {
525 o = get_indexed_object(--i);
2a745324
BH
526 if (!o)
527 continue;
051e4005
JH
528 if (!(o->flags & OUR_REF))
529 continue;
530 memcpy(namebuf + 1, sha1_to_hex(o->sha1), 40);
531 if (write_in_full(cmd.in, namebuf, 42) < 0)
532 goto error;
533 }
534 namebuf[40] = '\n';
535 for (i = 0; i < want_obj.nr; i++) {
536 o = want_obj.objects[i].item;
537 if (o->flags & OUR_REF)
538 continue;
539 memcpy(namebuf, sha1_to_hex(o->sha1), 40);
540 if (write_in_full(cmd.in, namebuf, 41) < 0)
541 goto error;
542 }
543 close(cmd.in);
544
545 sigchain_pop(SIGPIPE);
546
547 /*
548 * The commits out of the rev-list are not ancestors of
549 * our ref.
550 */
551 i = read_in_full(cmd.out, namebuf, 1);
552 if (i)
553 goto error;
554 close(cmd.out);
555
556 /*
557 * rev-list may have died by encountering a bad commit
558 * in the history, in which case we do want to bail out
559 * even when it showed no commit.
560 */
561 if (finish_command(&cmd))
562 goto error;
563
564 /* All the non-tip ones are ancestors of what we advertised */
565 return;
566
567error:
568 /* Pick one of them (we know there at least is one) */
569 for (i = 0; i < want_obj.nr; i++) {
570 o = want_obj.objects[i].item;
571 if (!(o->flags & OUR_REF))
572 die("git upload-pack: not our ref %s",
573 sha1_to_hex(o->sha1));
574 }
575}
576
b1e9fff7 577static void receive_needs(void)
fb9040cc 578{
3cd47459 579 struct object_array shallows = OBJECT_ARRAY_INIT;
fb9040cc 580 static char line[1000];
016e6ccb 581 int len, depth = 0;
051e4005 582 int has_non_tip = 0;
fb9040cc 583
f0cea83f 584 shallow_nr = 0;
49aaddd1 585 if (debug_fd)
2b7ca830 586 write_str_in_full(debug_fd, "#S\n");
fb9040cc 587 for (;;) {
565ebbf7 588 struct object *o;
f47182c8 589 const char *features;
6ece0d30 590 unsigned char sha1_buf[20];
fb9040cc 591 len = packet_read_line(0, line, sizeof(line));
960deccb 592 reset_timeout();
fb9040cc 593 if (!len)
ed09aef0 594 break;
49aaddd1
SP
595 if (debug_fd)
596 write_in_full(debug_fd, line, len);
e091eb93 597
599065a3 598 if (!prefixcmp(line, "shallow ")) {
ed09aef0
JS
599 unsigned char sha1[20];
600 struct object *object;
601 if (get_sha1(line + 8, sha1))
602 die("invalid shallow line: %s", line);
603 object = parse_object(sha1);
604 if (!object)
605 die("did not find object for %s", line);
f53514bc 606 object->flags |= CLIENT_SHALLOW;
ed09aef0
JS
607 add_object_array(object, NULL, &shallows);
608 continue;
609 }
599065a3 610 if (!prefixcmp(line, "deepen ")) {
016e6ccb
JS
611 char *end;
612 depth = strtol(line + 7, &end, 0);
613 if (end == line + 7 || depth <= 0)
614 die("Invalid deepen: %s", line);
615 continue;
616 }
599065a3 617 if (prefixcmp(line, "want ") ||
6ece0d30 618 get_sha1_hex(line+5, sha1_buf))
7e44c935 619 die("git upload-pack: protocol error, "
e091eb93 620 "expected to get sha, not '%s'", line);
f47182c8
JH
621
622 features = line + 45;
623
624 if (parse_feature_request(features, "multi_ack_detailed"))
78affc49 625 multi_ack = 2;
f47182c8 626 else if (parse_feature_request(features, "multi_ack"))
1bd8c8f0 627 multi_ack = 1;
f47182c8 628 if (parse_feature_request(features, "no-done"))
4e10cf9a 629 no_done = 1;
f47182c8 630 if (parse_feature_request(features, "thin-pack"))
b19696c2 631 use_thin_pack = 1;
f47182c8 632 if (parse_feature_request(features, "ofs-delta"))
e4fe4b8e 633 use_ofs_delta = 1;
f47182c8 634 if (parse_feature_request(features, "side-band-64k"))
d47f3db7 635 use_sideband = LARGE_PACKET_MAX;
f47182c8 636 else if (parse_feature_request(features, "side-band"))
d47f3db7 637 use_sideband = DEFAULT_PACKET_MAX;
f47182c8 638 if (parse_feature_request(features, "no-progress"))
b0e90897 639 no_progress = 1;
f47182c8 640 if (parse_feature_request(features, "include-tag"))
348e390b 641 use_include_tag = 1;
565ebbf7 642
565ebbf7 643 o = lookup_object(sha1_buf);
051e4005 644 if (!o)
9f9aa761
EN
645 die("git upload-pack: not our ref %s",
646 sha1_to_hex(sha1_buf));
565ebbf7
JH
647 if (!(o->flags & WANTED)) {
648 o->flags |= WANTED;
051e4005
JH
649 if (!(o->flags & OUR_REF))
650 has_non_tip = 1;
b1e9fff7 651 add_object_array(o, NULL, &want_obj);
565ebbf7 652 }
fb9040cc 653 }
49aaddd1 654 if (debug_fd)
2b7ca830 655 write_str_in_full(debug_fd, "#E\n");
9462e3f5 656
051e4005
JH
657 /*
658 * We have sent all our refs already, and the other end
659 * should have chosen out of them. When we are operating
660 * in the stateless RPC mode, however, their choice may
661 * have been based on the set of older refs advertised
662 * by another process that handled the initial request.
663 */
664 if (has_non_tip)
665 check_non_tip();
666
9462e3f5
JS
667 if (!use_sideband && daemon_mode)
668 no_progress = 1;
669
f53514bc
JS
670 if (depth == 0 && shallows.nr == 0)
671 return;
016e6ccb
JS
672 if (depth > 0) {
673 struct commit_list *result, *backup;
f53514bc
JS
674 int i;
675 backup = result = get_shallow_commits(&want_obj, depth,
676 SHALLOW, NOT_SHALLOW);
016e6ccb 677 while (result) {
f53514bc 678 struct object *object = &result->item->object;
1f2de769 679 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
f53514bc
JS
680 packet_write(1, "shallow %s",
681 sha1_to_hex(object->sha1));
682 register_shallow(object->sha1);
f0cea83f 683 shallow_nr++;
f53514bc 684 }
016e6ccb
JS
685 result = result->next;
686 }
687 free_commit_list(backup);
f53514bc
JS
688 for (i = 0; i < shallows.nr; i++) {
689 struct object *object = shallows.objects[i].item;
690 if (object->flags & NOT_SHALLOW) {
691 struct commit_list *parents;
692 packet_write(1, "unshallow %s",
693 sha1_to_hex(object->sha1));
694 object->flags &= ~CLIENT_SHALLOW;
695 /* make sure the real parents are parsed */
696 unregister_shallow(object->sha1);
176d45cb 697 object->parsed = 0;
dec38c81
MK
698 if (parse_commit((struct commit *)object))
699 die("invalid commit");
f53514bc
JS
700 parents = ((struct commit *)object)->parents;
701 while (parents) {
702 add_object_array(&parents->item->object,
703 NULL, &want_obj);
704 parents = parents->next;
705 }
6523078b 706 add_object_array(object, NULL, &extra_edge_obj);
f53514bc
JS
707 }
708 /* make sure commit traversal conforms to client */
709 register_shallow(object->sha1);
710 }
711 packet_flush(1);
712 } else
713 if (shallows.nr > 0) {
714 int i;
715 for (i = 0; i < shallows.nr; i++)
716 register_shallow(shallows.objects[i].item->sha1);
717 }
f0cea83f
NE
718
719 shallow_nr += shallows.nr;
f53514bc 720 free(shallows.objects);
fb9040cc
LT
721}
722
8da19775 723static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
def88e9a 724{
ed09aef0 725 static const char *capabilities = "multi_ack thin-pack side-band"
348e390b 726 " side-band-64k ofs-delta shallow no-progress"
78affc49 727 " include-tag multi_ack_detailed";
926f1dd9 728 struct object *o = lookup_unknown_object(sha1);
6b01ecfe 729 const char *refname_nons = strip_namespace(refname);
f6b42a81 730
926f1dd9
JK
731 if (o->type == OBJ_NONE) {
732 o->type = sha1_object_info(sha1, NULL);
733 if (o->type < 0)
734 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
735 }
b5b16990 736
1f5881bb 737 if (capabilities)
ff5effdf
JK
738 packet_write(1, "%s %s%c%s%s agent=%s\n",
739 sha1_to_hex(sha1), refname_nons,
cf2ad8e6 740 0, capabilities,
ff5effdf
JK
741 stateless_rpc ? " no-done" : "",
742 git_user_agent_sanitized());
1f5881bb 743 else
6b01ecfe 744 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
1f5881bb 745 capabilities = NULL;
565ebbf7
JH
746 if (!(o->flags & OUR_REF)) {
747 o->flags |= OUR_REF;
748 nr_our_refs++;
749 }
1974632c 750 if (o->type == OBJ_TAG) {
90108a24 751 o = deref_tag_noverify(o);
affeef12 752 if (o)
6b01ecfe 753 packet_write(1, "%s %s^{}\n", sha1_to_hex(o->sha1), refname_nons);
f6b42a81 754 }
def88e9a
LT
755 return 0;
756}
757
42526b47
SP
758static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
759{
760 struct object *o = parse_object(sha1);
761 if (!o)
762 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
763 if (!(o->flags & OUR_REF)) {
764 o->flags |= OUR_REF;
765 nr_our_refs++;
766 }
767 return 0;
768}
769
59076eba 770static void upload_pack(void)
def88e9a 771{
42526b47
SP
772 if (advertise_refs || !stateless_rpc) {
773 reset_timeout();
6b01ecfe
JT
774 head_ref_namespaced(send_ref, NULL);
775 for_each_namespaced_ref(send_ref, NULL);
42526b47
SP
776 packet_flush(1);
777 } else {
6b01ecfe
JT
778 head_ref_namespaced(mark_our_ref, NULL);
779 for_each_namespaced_ref(mark_our_ref, NULL);
42526b47
SP
780 }
781 if (advertise_refs)
782 return;
783
b1e9fff7 784 receive_needs();
59076eba
DR
785 if (want_obj.nr) {
786 get_common_commits();
787 create_pack_file();
788 }
def88e9a
LT
789}
790
791int main(int argc, char **argv)
792{
8d630132 793 char *dir;
960deccb
PA
794 int i;
795 int strict = 0;
796
5e9637c6
ÆAB
797 git_setup_gettext();
798
bbc30f99 799 packet_trace_identity("upload-pack");
2fb3f6db 800 git_extract_argv0_path(argv[0]);
dae556bd 801 read_replace_refs = 0;
2fb3f6db 802
960deccb
PA
803 for (i = 1; i < argc; i++) {
804 char *arg = argv[i];
805
806 if (arg[0] != '-')
807 break;
42526b47
SP
808 if (!strcmp(arg, "--advertise-refs")) {
809 advertise_refs = 1;
810 continue;
811 }
812 if (!strcmp(arg, "--stateless-rpc")) {
813 stateless_rpc = 1;
814 continue;
815 }
960deccb
PA
816 if (!strcmp(arg, "--strict")) {
817 strict = 1;
818 continue;
819 }
cc44c765 820 if (!prefixcmp(arg, "--timeout=")) {
960deccb 821 timeout = atoi(arg+10);
9462e3f5 822 daemon_mode = 1;
960deccb
PA
823 continue;
824 }
825 if (!strcmp(arg, "--")) {
826 i++;
827 break;
828 }
829 }
a6080a0a 830
960deccb 831 if (i != argc-1)
def88e9a 832 usage(upload_pack_usage);
04b33055 833
e1464ca7 834 setup_path();
04b33055 835
960deccb 836 dir = argv[i];
113b9475 837
8d630132 838 if (!enter_repo(dir, strict))
05ac6b34 839 die("'%s' does not appear to be a git repository", dir);
a0022eeb
JH
840 if (is_repository_shallow())
841 die("attempt to fetch/clone from a shallow repository");
49aaddd1
SP
842 if (getenv("GIT_DEBUG_SEND_PACK"))
843 debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
def88e9a
LT
844 upload_pack();
845 return 0;
846}