upload-pack: simplify request validation
[git/git.git] / upload-pack.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "pkt-line.h"
4 #include "sideband.h"
5 #include "tag.h"
6 #include "object.h"
7 #include "commit.h"
8 #include "exec_cmd.h"
9 #include "diff.h"
10 #include "revision.h"
11 #include "list-objects.h"
12 #include "run-command.h"
13 #include "sigchain.h"
14 #include "version.h"
15
16 static const char upload_pack_usage[] = "git upload-pack [--strict] [--timeout=<n>] <dir>";
17
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
25 #define SHALLOW (1u << 16)
26 #define NOT_SHALLOW (1u << 17)
27 #define CLIENT_SHALLOW (1u << 18)
28
29 static unsigned long oldest_have;
30
31 static int multi_ack;
32 static int no_done;
33 static int use_thin_pack, use_ofs_delta, use_include_tag;
34 static int no_progress, daemon_mode;
35 static int shallow_nr;
36 static struct object_array have_obj;
37 static struct object_array want_obj;
38 static struct object_array extra_edge_obj;
39 static unsigned int timeout;
40 /* 0 for no sideband,
41 * otherwise maximum packet size (up to 65520 bytes).
42 */
43 static int use_sideband;
44 static int debug_fd;
45 static int advertise_refs;
46 static int stateless_rpc;
47
48 static void reset_timeout(void)
49 {
50 alarm(timeout);
51 }
52
53 static int strip(char *line, int len)
54 {
55 if (len && line[len-1] == '\n')
56 line[--len] = 0;
57 return len;
58 }
59
60 static ssize_t send_client_data(int fd, const char *data, ssize_t sz)
61 {
62 if (use_sideband)
63 return send_sideband(1, fd, data, sz, use_sideband);
64 if (fd == 3)
65 /* emergency quit */
66 fd = 2;
67 if (fd == 2) {
68 /* XXX: are we happy to lose stuff here? */
69 xwrite(fd, data, sz);
70 return sz;
71 }
72 return safe_write(fd, data, sz);
73 }
74
75 static FILE *pack_pipe = NULL;
76 static void show_commit(struct commit *commit, void *data)
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
88 static void show_object(struct object *obj,
89 const struct name_path *path, const char *component,
90 void *cb_data)
91 {
92 show_object_with_name(pack_pipe, obj, path, component);
93 }
94
95 static void show_edge(struct commit *commit)
96 {
97 fprintf(pack_pipe, "-%s\n", sha1_to_hex(commit->object.sha1));
98 }
99
100 static int do_rev_list(int in, int out, void *user_data)
101 {
102 int i;
103 struct rev_info revs;
104
105 pack_pipe = xfdopen(out, "w");
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
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);
118 }
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);
125 if (prepare_revision_walk(&revs))
126 die("revision walk setup failed");
127 mark_edges_uninteresting(revs.commits, &revs, show_edge);
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));
132 traverse_commit_list(&revs, show_commit, show_object, NULL);
133 fflush(pack_pipe);
134 fclose(pack_pipe);
135 return 0;
136 }
137
138 static void create_pack_file(void)
139 {
140 struct async rev_list;
141 struct child_process pack_objects;
142 char data[8193], progress[128];
143 char abort_msg[] = "aborting due to possible repository "
144 "corruption on the remote side.";
145 int buffered = -1;
146 ssize_t sz;
147 const char *argv[10];
148 int arg = 0;
149
150 argv[arg++] = "pack-objects";
151 if (!shallow_nr) {
152 argv[arg++] = "--revs";
153 if (use_thin_pack)
154 argv[arg++] = "--thin";
155 }
156
157 argv[arg++] = "--stdout";
158 if (!no_progress)
159 argv[arg++] = "--progress";
160 if (use_ofs_delta)
161 argv[arg++] = "--delta-base-offset";
162 if (use_include_tag)
163 argv[arg++] = "--include-tag";
164 argv[arg++] = NULL;
165
166 memset(&pack_objects, 0, sizeof(pack_objects));
167 pack_objects.in = -1;
168 pack_objects.out = -1;
169 pack_objects.err = -1;
170 pack_objects.git_cmd = 1;
171 pack_objects.argv = argv;
172
173 if (start_command(&pack_objects))
174 die("git upload-pack: unable to fork git-pack-objects");
175
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 {
184 FILE *pipe_fd = xfdopen(pack_objects.in, "w");
185 int i;
186
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));
194 fprintf(pipe_fd, "\n");
195 fflush(pipe_fd);
196 fclose(pipe_fd);
197 }
198
199
200 /* We read from pack_objects.err to capture stderr output for
201 * progress bar, and pack_objects.out to capture the pack data.
202 */
203
204 while (1) {
205 struct pollfd pfd[2];
206 int pe, pu, pollsize;
207
208 reset_timeout();
209
210 pollsize = 0;
211 pe = pu = -1;
212
213 if (0 <= pack_objects.out) {
214 pfd[pollsize].fd = pack_objects.out;
215 pfd[pollsize].events = POLLIN;
216 pu = pollsize;
217 pollsize++;
218 }
219 if (0 <= pack_objects.err) {
220 pfd[pollsize].fd = pack_objects.err;
221 pfd[pollsize].events = POLLIN;
222 pe = pollsize;
223 pollsize++;
224 }
225
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);
234 }
235 continue;
236 }
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 }
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++;
269 }
270 sz = xread(pack_objects.out, cp,
271 sizeof(data) - outsz);
272 if (0 < sz)
273 ;
274 else if (sz == 0) {
275 close(pack_objects.out);
276 pack_objects.out = -1;
277 }
278 else
279 goto fail;
280 sz += outsz;
281 if (1 < sz) {
282 buffered = data[sz-1] & 0xFF;
283 sz--;
284 }
285 else
286 buffered = -1;
287 sz = send_client_data(1, data, sz);
288 if (sz < 0)
289 goto fail;
290 }
291 }
292
293 if (finish_command(&pack_objects)) {
294 error("git upload-pack: git-pack-objects died with error.");
295 goto fail;
296 }
297 if (shallow_nr && finish_async(&rev_list))
298 goto fail; /* error was already reported */
299
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");
307 }
308 if (use_sideband)
309 packet_flush(1);
310 return;
311
312 fail:
313 send_client_data(3, abort_msg, sizeof(abort_msg));
314 die("git upload-pack: %s", abort_msg);
315 }
316
317 static int got_sha1(char *hex, unsigned char *sha1)
318 {
319 struct object *o;
320 int we_knew_they_have = 0;
321
322 if (get_sha1_hex(hex, sha1))
323 die("git upload-pack: expected SHA1 object, got '%s'", hex);
324 if (!has_sha1_file(sha1))
325 return -1;
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));
332 if (o->type == OBJ_COMMIT) {
333 struct commit_list *parents;
334 struct commit *commit = (struct commit *)o;
335 if (o->flags & THEY_HAVE)
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;
342 parents;
343 parents = parents->next)
344 parents->item->object.flags |= THEY_HAVE;
345 }
346 if (!we_knew_they_have) {
347 add_object_array(o, NULL, &have_obj);
348 return 1;
349 }
350 return 0;
351 }
352
353 static int reachable(struct commit *want)
354 {
355 struct commit_list *work = NULL;
356
357 commit_list_insert_by_date(want, &work);
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))
378 commit_list_insert_by_date(parent, &work);
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
387 static 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 }
412 return 1;
413 }
414
415 static int get_common_commits(void)
416 {
417 static char line[1000];
418 unsigned char sha1[20];
419 char last_hex[41];
420 int got_common = 0;
421 int got_other = 0;
422 int sent_ready = 0;
423
424 save_commit_buffer = 0;
425
426 for (;;) {
427 int len = packet_read_line(0, line, sizeof(line));
428 reset_timeout();
429
430 if (!len) {
431 if (multi_ack == 2 && got_common
432 && !got_other && ok_to_give_up()) {
433 sent_ready = 1;
434 packet_write(1, "ACK %s ready\n", last_hex);
435 }
436 if (have_obj.nr == 0 || multi_ack)
437 packet_write(1, "NAK\n");
438
439 if (no_done && sent_ready) {
440 packet_write(1, "ACK %s\n", last_hex);
441 return 0;
442 }
443 if (stateless_rpc)
444 exit(0);
445 got_common = 0;
446 got_other = 0;
447 continue;
448 }
449 strip(line, len);
450 if (!prefixcmp(line, "have ")) {
451 switch (got_sha1(line+5, sha1)) {
452 case -1: /* they have what we do not */
453 got_other = 1;
454 if (multi_ack && ok_to_give_up()) {
455 const char *hex = sha1_to_hex(sha1);
456 if (multi_ack == 2) {
457 sent_ready = 1;
458 packet_write(1, "ACK %s ready\n", hex);
459 } else
460 packet_write(1, "ACK %s continue\n", hex);
461 }
462 break;
463 default:
464 got_common = 1;
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);
470 else if (have_obj.nr == 1)
471 packet_write(1, "ACK %s\n", last_hex);
472 break;
473 }
474 continue;
475 }
476 if (!strcmp(line, "done")) {
477 if (have_obj.nr > 0) {
478 if (multi_ack)
479 packet_write(1, "ACK %s\n", last_hex);
480 return 0;
481 }
482 packet_write(1, "NAK\n");
483 return -1;
484 }
485 die("git upload-pack: expected SHA1 list, got '%s'", line);
486 }
487 }
488
489 static 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);
523 if (!o)
524 continue;
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
564 error:
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
574 static void receive_needs(void)
575 {
576 struct object_array shallows = OBJECT_ARRAY_INIT;
577 static char line[1000];
578 int len, depth = 0;
579 int has_non_tip = 0;
580
581 shallow_nr = 0;
582 if (debug_fd)
583 write_str_in_full(debug_fd, "#S\n");
584 for (;;) {
585 struct object *o;
586 const char *features;
587 unsigned char sha1_buf[20];
588 len = packet_read_line(0, line, sizeof(line));
589 reset_timeout();
590 if (!len)
591 break;
592 if (debug_fd)
593 write_in_full(debug_fd, line, len);
594
595 if (!prefixcmp(line, "shallow ")) {
596 unsigned char sha1[20];
597 struct object *object;
598 if (get_sha1(line + 8, sha1))
599 die("invalid shallow line: %s", line);
600 object = parse_object(sha1);
601 if (!object)
602 die("did not find object for %s", line);
603 if (object->type != OBJ_COMMIT)
604 die("invalid shallow object %s", sha1_to_hex(sha1));
605 object->flags |= CLIENT_SHALLOW;
606 add_object_array(object, NULL, &shallows);
607 continue;
608 }
609 if (!prefixcmp(line, "deepen ")) {
610 char *end;
611 depth = strtol(line + 7, &end, 0);
612 if (end == line + 7 || depth <= 0)
613 die("Invalid deepen: %s", line);
614 continue;
615 }
616 if (prefixcmp(line, "want ") ||
617 get_sha1_hex(line+5, sha1_buf))
618 die("git upload-pack: protocol error, "
619 "expected to get sha, not '%s'", line);
620
621 features = line + 45;
622
623 if (parse_feature_request(features, "multi_ack_detailed"))
624 multi_ack = 2;
625 else if (parse_feature_request(features, "multi_ack"))
626 multi_ack = 1;
627 if (parse_feature_request(features, "no-done"))
628 no_done = 1;
629 if (parse_feature_request(features, "thin-pack"))
630 use_thin_pack = 1;
631 if (parse_feature_request(features, "ofs-delta"))
632 use_ofs_delta = 1;
633 if (parse_feature_request(features, "side-band-64k"))
634 use_sideband = LARGE_PACKET_MAX;
635 else if (parse_feature_request(features, "side-band"))
636 use_sideband = DEFAULT_PACKET_MAX;
637 if (parse_feature_request(features, "no-progress"))
638 no_progress = 1;
639 if (parse_feature_request(features, "include-tag"))
640 use_include_tag = 1;
641
642 o = lookup_object(sha1_buf);
643 if (!o)
644 die("git upload-pack: not our ref %s",
645 sha1_to_hex(sha1_buf));
646 if (!(o->flags & WANTED)) {
647 o->flags |= WANTED;
648 if (!(o->flags & OUR_REF))
649 has_non_tip = 1;
650 add_object_array(o, NULL, &want_obj);
651 }
652 }
653 if (debug_fd)
654 write_str_in_full(debug_fd, "#E\n");
655
656 /*
657 * We have sent all our refs already, and the other end
658 * should have chosen out of them. When we are operating
659 * in the stateless RPC mode, however, their choice may
660 * have been based on the set of older refs advertised
661 * by another process that handled the initial request.
662 */
663 if (has_non_tip)
664 check_non_tip();
665
666 if (!use_sideband && daemon_mode)
667 no_progress = 1;
668
669 if (depth == 0 && shallows.nr == 0)
670 return;
671 if (depth > 0) {
672 struct commit_list *result, *backup;
673 int i;
674 backup = result = get_shallow_commits(&want_obj, depth,
675 SHALLOW, NOT_SHALLOW);
676 while (result) {
677 struct object *object = &result->item->object;
678 if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
679 packet_write(1, "shallow %s",
680 sha1_to_hex(object->sha1));
681 register_shallow(object->sha1);
682 shallow_nr++;
683 }
684 result = result->next;
685 }
686 free_commit_list(backup);
687 for (i = 0; i < shallows.nr; i++) {
688 struct object *object = shallows.objects[i].item;
689 if (object->flags & NOT_SHALLOW) {
690 struct commit_list *parents;
691 packet_write(1, "unshallow %s",
692 sha1_to_hex(object->sha1));
693 object->flags &= ~CLIENT_SHALLOW;
694 /* make sure the real parents are parsed */
695 unregister_shallow(object->sha1);
696 object->parsed = 0;
697 if (parse_commit((struct commit *)object))
698 die("invalid commit");
699 parents = ((struct commit *)object)->parents;
700 while (parents) {
701 add_object_array(&parents->item->object,
702 NULL, &want_obj);
703 parents = parents->next;
704 }
705 add_object_array(object, NULL, &extra_edge_obj);
706 }
707 /* make sure commit traversal conforms to client */
708 register_shallow(object->sha1);
709 }
710 packet_flush(1);
711 } else
712 if (shallows.nr > 0) {
713 int i;
714 for (i = 0; i < shallows.nr; i++)
715 register_shallow(shallows.objects[i].item->sha1);
716 }
717
718 shallow_nr += shallows.nr;
719 free(shallows.objects);
720 }
721
722 static int mark_our_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
723 {
724 struct object *o = lookup_unknown_object(sha1);
725 if (!o)
726 die("git upload-pack: cannot find object %s:", sha1_to_hex(sha1));
727 o->flags |= OUR_REF;
728 return 0;
729 }
730
731 static int send_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
732 {
733 static const char *capabilities = "multi_ack thin-pack side-band"
734 " side-band-64k ofs-delta shallow no-progress"
735 " include-tag multi_ack_detailed";
736 const char *refname_nons = strip_namespace(refname);
737 unsigned char peeled[20];
738
739 mark_our_ref(refname, sha1, flag, cb_data);
740
741 if (capabilities)
742 packet_write(1, "%s %s%c%s%s agent=%s\n",
743 sha1_to_hex(sha1), refname_nons,
744 0, capabilities,
745 stateless_rpc ? " no-done" : "",
746 git_user_agent_sanitized());
747 else
748 packet_write(1, "%s %s\n", sha1_to_hex(sha1), refname_nons);
749 capabilities = NULL;
750 if (!peel_ref(refname, peeled))
751 packet_write(1, "%s %s^{}\n", sha1_to_hex(peeled), refname_nons);
752 return 0;
753 }
754
755 static void upload_pack(void)
756 {
757 if (advertise_refs || !stateless_rpc) {
758 reset_timeout();
759 head_ref_namespaced(send_ref, NULL);
760 for_each_namespaced_ref(send_ref, NULL);
761 packet_flush(1);
762 } else {
763 head_ref_namespaced(mark_our_ref, NULL);
764 for_each_namespaced_ref(mark_our_ref, NULL);
765 }
766 if (advertise_refs)
767 return;
768
769 receive_needs();
770 if (want_obj.nr) {
771 get_common_commits();
772 create_pack_file();
773 }
774 }
775
776 int main(int argc, char **argv)
777 {
778 char *dir;
779 int i;
780 int strict = 0;
781
782 git_setup_gettext();
783
784 packet_trace_identity("upload-pack");
785 git_extract_argv0_path(argv[0]);
786 read_replace_refs = 0;
787
788 for (i = 1; i < argc; i++) {
789 char *arg = argv[i];
790
791 if (arg[0] != '-')
792 break;
793 if (!strcmp(arg, "--advertise-refs")) {
794 advertise_refs = 1;
795 continue;
796 }
797 if (!strcmp(arg, "--stateless-rpc")) {
798 stateless_rpc = 1;
799 continue;
800 }
801 if (!strcmp(arg, "--strict")) {
802 strict = 1;
803 continue;
804 }
805 if (!prefixcmp(arg, "--timeout=")) {
806 timeout = atoi(arg+10);
807 daemon_mode = 1;
808 continue;
809 }
810 if (!strcmp(arg, "--")) {
811 i++;
812 break;
813 }
814 }
815
816 if (i != argc-1)
817 usage(upload_pack_usage);
818
819 setup_path();
820
821 dir = argv[i];
822
823 if (!enter_repo(dir, strict))
824 die("'%s' does not appear to be a git repository", dir);
825 if (is_repository_shallow())
826 die("attempt to fetch/clone from a shallow repository");
827 if (getenv("GIT_DEBUG_SEND_PACK"))
828 debug_fd = atoi(getenv("GIT_DEBUG_SEND_PACK"));
829 upload_pack();
830 return 0;
831 }