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Commit | Line | Data |
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745f7a8c NTND |
1 | #include "cache.h" |
2 | #include "refs.h" | |
3 | #include "pkt-line.h" | |
4 | #include "commit.h" | |
5 | #include "tag.h" | |
6 | #include "exec_cmd.h" | |
7 | #include "pack.h" | |
8 | #include "sideband.h" | |
9 | #include "fetch-pack.h" | |
10 | #include "remote.h" | |
11 | #include "run-command.h" | |
47a59185 | 12 | #include "connect.h" |
745f7a8c NTND |
13 | #include "transport.h" |
14 | #include "version.h" | |
099327b5 | 15 | #include "prio-queue.h" |
745f7a8c NTND |
16 | |
17 | static int transfer_unpack_limit = -1; | |
18 | static int fetch_unpack_limit = -1; | |
19 | static int unpack_limit = 100; | |
20 | static int prefer_ofs_delta = 1; | |
21 | static int no_done; | |
22 | static int fetch_fsck_objects = -1; | |
23 | static int transfer_fsck_objects = -1; | |
24 | static int agent_supported; | |
6035d6aa NTND |
25 | static struct lock_file shallow_lock; |
26 | static const char *alternate_shallow_file; | |
745f7a8c NTND |
27 | |
28 | #define COMPLETE (1U << 0) | |
29 | #define COMMON (1U << 1) | |
30 | #define COMMON_REF (1U << 2) | |
31 | #define SEEN (1U << 3) | |
32 | #define POPPED (1U << 4) | |
33 | ||
34 | static int marked; | |
35 | ||
36 | /* | |
37 | * After sending this many "have"s if we do not get any new ACK , we | |
38 | * give up traversing our history. | |
39 | */ | |
40 | #define MAX_IN_VAIN 256 | |
41 | ||
099327b5 | 42 | static struct prio_queue rev_list = { compare_commits_by_commit_date }; |
6e7b66ee | 43 | static int non_common_revs, multi_ack, use_sideband, allow_tip_sha1_in_want; |
745f7a8c NTND |
44 | |
45 | static void rev_list_push(struct commit *commit, int mark) | |
46 | { | |
47 | if (!(commit->object.flags & mark)) { | |
48 | commit->object.flags |= mark; | |
49 | ||
50 | if (!(commit->object.parsed)) | |
51 | if (parse_commit(commit)) | |
52 | return; | |
53 | ||
099327b5 | 54 | prio_queue_put(&rev_list, commit); |
745f7a8c NTND |
55 | |
56 | if (!(commit->object.flags & COMMON)) | |
57 | non_common_revs++; | |
58 | } | |
59 | } | |
60 | ||
61 | static int rev_list_insert_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
62 | { | |
63 | struct object *o = deref_tag(parse_object(sha1), refname, 0); | |
64 | ||
65 | if (o && o->type == OBJ_COMMIT) | |
66 | rev_list_push((struct commit *)o, SEEN); | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
71 | static int clear_marks(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
72 | { | |
73 | struct object *o = deref_tag(parse_object(sha1), refname, 0); | |
74 | ||
75 | if (o && o->type == OBJ_COMMIT) | |
76 | clear_commit_marks((struct commit *)o, | |
77 | COMMON | COMMON_REF | SEEN | POPPED); | |
78 | return 0; | |
79 | } | |
80 | ||
81 | /* | |
82 | This function marks a rev and its ancestors as common. | |
83 | In some cases, it is desirable to mark only the ancestors (for example | |
84 | when only the server does not yet know that they are common). | |
85 | */ | |
86 | ||
87 | static void mark_common(struct commit *commit, | |
88 | int ancestors_only, int dont_parse) | |
89 | { | |
90 | if (commit != NULL && !(commit->object.flags & COMMON)) { | |
91 | struct object *o = (struct object *)commit; | |
92 | ||
93 | if (!ancestors_only) | |
94 | o->flags |= COMMON; | |
95 | ||
96 | if (!(o->flags & SEEN)) | |
97 | rev_list_push(commit, SEEN); | |
98 | else { | |
99 | struct commit_list *parents; | |
100 | ||
101 | if (!ancestors_only && !(o->flags & POPPED)) | |
102 | non_common_revs--; | |
103 | if (!o->parsed && !dont_parse) | |
104 | if (parse_commit(commit)) | |
105 | return; | |
106 | ||
107 | for (parents = commit->parents; | |
108 | parents; | |
109 | parents = parents->next) | |
110 | mark_common(parents->item, 0, dont_parse); | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | /* | |
116 | Get the next rev to send, ignoring the common. | |
117 | */ | |
118 | ||
119 | static const unsigned char *get_rev(void) | |
120 | { | |
121 | struct commit *commit = NULL; | |
122 | ||
123 | while (commit == NULL) { | |
124 | unsigned int mark; | |
125 | struct commit_list *parents; | |
126 | ||
099327b5 | 127 | if (rev_list.nr == 0 || non_common_revs == 0) |
745f7a8c NTND |
128 | return NULL; |
129 | ||
099327b5 | 130 | commit = prio_queue_get(&rev_list); |
745f7a8c NTND |
131 | if (!commit->object.parsed) |
132 | parse_commit(commit); | |
133 | parents = commit->parents; | |
134 | ||
135 | commit->object.flags |= POPPED; | |
136 | if (!(commit->object.flags & COMMON)) | |
137 | non_common_revs--; | |
138 | ||
139 | if (commit->object.flags & COMMON) { | |
140 | /* do not send "have", and ignore ancestors */ | |
141 | commit = NULL; | |
142 | mark = COMMON | SEEN; | |
143 | } else if (commit->object.flags & COMMON_REF) | |
144 | /* send "have", and ignore ancestors */ | |
145 | mark = COMMON | SEEN; | |
146 | else | |
147 | /* send "have", also for its ancestors */ | |
148 | mark = SEEN; | |
149 | ||
150 | while (parents) { | |
151 | if (!(parents->item->object.flags & SEEN)) | |
152 | rev_list_push(parents->item, mark); | |
153 | if (mark & COMMON) | |
154 | mark_common(parents->item, 1, 0); | |
155 | parents = parents->next; | |
156 | } | |
745f7a8c NTND |
157 | } |
158 | ||
159 | return commit->object.sha1; | |
160 | } | |
161 | ||
162 | enum ack_type { | |
163 | NAK = 0, | |
164 | ACK, | |
165 | ACK_continue, | |
166 | ACK_common, | |
167 | ACK_ready | |
168 | }; | |
169 | ||
170 | static void consume_shallow_list(struct fetch_pack_args *args, int fd) | |
171 | { | |
172 | if (args->stateless_rpc && args->depth > 0) { | |
173 | /* If we sent a depth we will get back "duplicate" | |
174 | * shallow and unshallow commands every time there | |
175 | * is a block of have lines exchanged. | |
176 | */ | |
74543a04 JK |
177 | char *line; |
178 | while ((line = packet_read_line(fd, NULL))) { | |
745f7a8c NTND |
179 | if (!prefixcmp(line, "shallow ")) |
180 | continue; | |
181 | if (!prefixcmp(line, "unshallow ")) | |
182 | continue; | |
183 | die("git fetch-pack: expected shallow list"); | |
184 | } | |
185 | } | |
186 | } | |
187 | ||
745f7a8c NTND |
188 | static enum ack_type get_ack(int fd, unsigned char *result_sha1) |
189 | { | |
74543a04 JK |
190 | int len; |
191 | char *line = packet_read_line(fd, &len); | |
745f7a8c NTND |
192 | |
193 | if (!len) | |
194 | die("git fetch-pack: expected ACK/NAK, got EOF"); | |
745f7a8c NTND |
195 | if (!strcmp(line, "NAK")) |
196 | return NAK; | |
197 | if (!prefixcmp(line, "ACK ")) { | |
198 | if (!get_sha1_hex(line+4, result_sha1)) { | |
030e9dd6 JK |
199 | if (len < 45) |
200 | return ACK; | |
745f7a8c NTND |
201 | if (strstr(line+45, "continue")) |
202 | return ACK_continue; | |
203 | if (strstr(line+45, "common")) | |
204 | return ACK_common; | |
205 | if (strstr(line+45, "ready")) | |
206 | return ACK_ready; | |
207 | return ACK; | |
208 | } | |
209 | } | |
210 | die("git fetch_pack: expected ACK/NAK, got '%s'", line); | |
211 | } | |
212 | ||
213 | static void send_request(struct fetch_pack_args *args, | |
214 | int fd, struct strbuf *buf) | |
215 | { | |
216 | if (args->stateless_rpc) { | |
217 | send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); | |
218 | packet_flush(fd); | |
219 | } else | |
cdf4fb8e | 220 | write_or_die(fd, buf->buf, buf->len); |
745f7a8c NTND |
221 | } |
222 | ||
223 | static void insert_one_alternate_ref(const struct ref *ref, void *unused) | |
224 | { | |
225 | rev_list_insert_ref(NULL, ref->old_sha1, 0, NULL); | |
226 | } | |
227 | ||
228 | #define INITIAL_FLUSH 16 | |
229 | #define PIPESAFE_FLUSH 32 | |
230 | #define LARGE_FLUSH 1024 | |
231 | ||
232 | static int next_flush(struct fetch_pack_args *args, int count) | |
233 | { | |
234 | int flush_limit = args->stateless_rpc ? LARGE_FLUSH : PIPESAFE_FLUSH; | |
235 | ||
236 | if (count < flush_limit) | |
237 | count <<= 1; | |
238 | else | |
239 | count += flush_limit; | |
240 | return count; | |
241 | } | |
242 | ||
243 | static int find_common(struct fetch_pack_args *args, | |
244 | int fd[2], unsigned char *result_sha1, | |
245 | struct ref *refs) | |
246 | { | |
247 | int fetching; | |
248 | int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; | |
249 | const unsigned char *sha1; | |
250 | unsigned in_vain = 0; | |
251 | int got_continue = 0; | |
252 | int got_ready = 0; | |
253 | struct strbuf req_buf = STRBUF_INIT; | |
254 | size_t state_len = 0; | |
255 | ||
256 | if (args->stateless_rpc && multi_ack == 1) | |
257 | die("--stateless-rpc requires multi_ack_detailed"); | |
258 | if (marked) | |
259 | for_each_ref(clear_marks, NULL); | |
260 | marked = 1; | |
261 | ||
262 | for_each_ref(rev_list_insert_ref, NULL); | |
263 | for_each_alternate_ref(insert_one_alternate_ref, NULL); | |
264 | ||
265 | fetching = 0; | |
266 | for ( ; refs ; refs = refs->next) { | |
267 | unsigned char *remote = refs->old_sha1; | |
268 | const char *remote_hex; | |
269 | struct object *o; | |
270 | ||
271 | /* | |
272 | * If that object is complete (i.e. it is an ancestor of a | |
273 | * local ref), we tell them we have it but do not have to | |
274 | * tell them about its ancestors, which they already know | |
275 | * about. | |
276 | * | |
277 | * We use lookup_object here because we are only | |
278 | * interested in the case we *know* the object is | |
279 | * reachable and we have already scanned it. | |
280 | */ | |
281 | if (((o = lookup_object(remote)) != NULL) && | |
282 | (o->flags & COMPLETE)) { | |
283 | continue; | |
284 | } | |
285 | ||
286 | remote_hex = sha1_to_hex(remote); | |
287 | if (!fetching) { | |
288 | struct strbuf c = STRBUF_INIT; | |
289 | if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); | |
290 | if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); | |
291 | if (no_done) strbuf_addstr(&c, " no-done"); | |
292 | if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); | |
293 | if (use_sideband == 1) strbuf_addstr(&c, " side-band"); | |
294 | if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); | |
295 | if (args->no_progress) strbuf_addstr(&c, " no-progress"); | |
296 | if (args->include_tag) strbuf_addstr(&c, " include-tag"); | |
297 | if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); | |
298 | if (agent_supported) strbuf_addf(&c, " agent=%s", | |
299 | git_user_agent_sanitized()); | |
300 | packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); | |
301 | strbuf_release(&c); | |
302 | } else | |
303 | packet_buf_write(&req_buf, "want %s\n", remote_hex); | |
304 | fetching++; | |
305 | } | |
306 | ||
307 | if (!fetching) { | |
308 | strbuf_release(&req_buf); | |
309 | packet_flush(fd[1]); | |
310 | return 1; | |
311 | } | |
312 | ||
313 | if (is_repository_shallow()) | |
314 | write_shallow_commits(&req_buf, 1); | |
315 | if (args->depth > 0) | |
316 | packet_buf_write(&req_buf, "deepen %d", args->depth); | |
317 | packet_buf_flush(&req_buf); | |
318 | state_len = req_buf.len; | |
319 | ||
320 | if (args->depth > 0) { | |
74543a04 | 321 | char *line; |
745f7a8c NTND |
322 | unsigned char sha1[20]; |
323 | ||
324 | send_request(args, fd[1], &req_buf); | |
74543a04 | 325 | while ((line = packet_read_line(fd[0], NULL))) { |
745f7a8c NTND |
326 | if (!prefixcmp(line, "shallow ")) { |
327 | if (get_sha1_hex(line + 8, sha1)) | |
328 | die("invalid shallow line: %s", line); | |
329 | register_shallow(sha1); | |
330 | continue; | |
331 | } | |
332 | if (!prefixcmp(line, "unshallow ")) { | |
333 | if (get_sha1_hex(line + 10, sha1)) | |
334 | die("invalid unshallow line: %s", line); | |
335 | if (!lookup_object(sha1)) | |
336 | die("object not found: %s", line); | |
337 | /* make sure that it is parsed as shallow */ | |
338 | if (!parse_object(sha1)) | |
339 | die("error in object: %s", line); | |
340 | if (unregister_shallow(sha1)) | |
341 | die("no shallow found: %s", line); | |
342 | continue; | |
343 | } | |
344 | die("expected shallow/unshallow, got %s", line); | |
345 | } | |
346 | } else if (!args->stateless_rpc) | |
347 | send_request(args, fd[1], &req_buf); | |
348 | ||
349 | if (!args->stateless_rpc) { | |
350 | /* If we aren't using the stateless-rpc interface | |
351 | * we don't need to retain the headers. | |
352 | */ | |
353 | strbuf_setlen(&req_buf, 0); | |
354 | state_len = 0; | |
355 | } | |
356 | ||
357 | flushes = 0; | |
358 | retval = -1; | |
359 | while ((sha1 = get_rev())) { | |
360 | packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1)); | |
361 | if (args->verbose) | |
362 | fprintf(stderr, "have %s\n", sha1_to_hex(sha1)); | |
363 | in_vain++; | |
364 | if (flush_at <= ++count) { | |
365 | int ack; | |
366 | ||
367 | packet_buf_flush(&req_buf); | |
368 | send_request(args, fd[1], &req_buf); | |
369 | strbuf_setlen(&req_buf, state_len); | |
370 | flushes++; | |
371 | flush_at = next_flush(args, count); | |
372 | ||
373 | /* | |
374 | * We keep one window "ahead" of the other side, and | |
375 | * will wait for an ACK only on the next one | |
376 | */ | |
377 | if (!args->stateless_rpc && count == INITIAL_FLUSH) | |
378 | continue; | |
379 | ||
380 | consume_shallow_list(args, fd[0]); | |
381 | do { | |
382 | ack = get_ack(fd[0], result_sha1); | |
383 | if (args->verbose && ack) | |
384 | fprintf(stderr, "got ack %d %s\n", ack, | |
385 | sha1_to_hex(result_sha1)); | |
386 | switch (ack) { | |
387 | case ACK: | |
388 | flushes = 0; | |
389 | multi_ack = 0; | |
390 | retval = 0; | |
391 | goto done; | |
392 | case ACK_common: | |
393 | case ACK_ready: | |
394 | case ACK_continue: { | |
395 | struct commit *commit = | |
396 | lookup_commit(result_sha1); | |
397 | if (!commit) | |
398 | die("invalid commit %s", sha1_to_hex(result_sha1)); | |
399 | if (args->stateless_rpc | |
400 | && ack == ACK_common | |
401 | && !(commit->object.flags & COMMON)) { | |
402 | /* We need to replay the have for this object | |
403 | * on the next RPC request so the peer knows | |
404 | * it is in common with us. | |
405 | */ | |
406 | const char *hex = sha1_to_hex(result_sha1); | |
407 | packet_buf_write(&req_buf, "have %s\n", hex); | |
408 | state_len = req_buf.len; | |
409 | } | |
410 | mark_common(commit, 0, 1); | |
411 | retval = 0; | |
412 | in_vain = 0; | |
413 | got_continue = 1; | |
414 | if (ack == ACK_ready) { | |
099327b5 | 415 | clear_prio_queue(&rev_list); |
745f7a8c NTND |
416 | got_ready = 1; |
417 | } | |
418 | break; | |
419 | } | |
420 | } | |
421 | } while (ack); | |
422 | flushes--; | |
423 | if (got_continue && MAX_IN_VAIN < in_vain) { | |
424 | if (args->verbose) | |
425 | fprintf(stderr, "giving up\n"); | |
426 | break; /* give up */ | |
427 | } | |
428 | } | |
429 | } | |
430 | done: | |
431 | if (!got_ready || !no_done) { | |
432 | packet_buf_write(&req_buf, "done\n"); | |
433 | send_request(args, fd[1], &req_buf); | |
434 | } | |
435 | if (args->verbose) | |
436 | fprintf(stderr, "done\n"); | |
437 | if (retval != 0) { | |
438 | multi_ack = 0; | |
439 | flushes++; | |
440 | } | |
441 | strbuf_release(&req_buf); | |
442 | ||
443 | consume_shallow_list(args, fd[0]); | |
444 | while (flushes || multi_ack) { | |
445 | int ack = get_ack(fd[0], result_sha1); | |
446 | if (ack) { | |
447 | if (args->verbose) | |
448 | fprintf(stderr, "got ack (%d) %s\n", ack, | |
449 | sha1_to_hex(result_sha1)); | |
450 | if (ack == ACK) | |
451 | return 0; | |
452 | multi_ack = 1; | |
453 | continue; | |
454 | } | |
455 | flushes--; | |
456 | } | |
457 | /* it is no error to fetch into a completely empty repo */ | |
458 | return count ? retval : 0; | |
459 | } | |
460 | ||
461 | static struct commit_list *complete; | |
462 | ||
463 | static int mark_complete(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
464 | { | |
465 | struct object *o = parse_object(sha1); | |
466 | ||
467 | while (o && o->type == OBJ_TAG) { | |
468 | struct tag *t = (struct tag *) o; | |
469 | if (!t->tagged) | |
470 | break; /* broken repository */ | |
471 | o->flags |= COMPLETE; | |
472 | o = parse_object(t->tagged->sha1); | |
473 | } | |
474 | if (o && o->type == OBJ_COMMIT) { | |
475 | struct commit *commit = (struct commit *)o; | |
476 | if (!(commit->object.flags & COMPLETE)) { | |
477 | commit->object.flags |= COMPLETE; | |
16445242 | 478 | commit_list_insert(commit, &complete); |
745f7a8c NTND |
479 | } |
480 | } | |
481 | return 0; | |
482 | } | |
483 | ||
484 | static void mark_recent_complete_commits(struct fetch_pack_args *args, | |
485 | unsigned long cutoff) | |
486 | { | |
487 | while (complete && cutoff <= complete->item->date) { | |
488 | if (args->verbose) | |
489 | fprintf(stderr, "Marking %s as complete\n", | |
490 | sha1_to_hex(complete->item->object.sha1)); | |
491 | pop_most_recent_commit(&complete, COMPLETE); | |
492 | } | |
493 | } | |
494 | ||
745f7a8c | 495 | static void filter_refs(struct fetch_pack_args *args, |
f2db854d JH |
496 | struct ref **refs, |
497 | struct ref **sought, int nr_sought) | |
745f7a8c NTND |
498 | { |
499 | struct ref *newlist = NULL; | |
500 | struct ref **newtail = &newlist; | |
501 | struct ref *ref, *next; | |
f2db854d | 502 | int i; |
745f7a8c | 503 | |
f2db854d | 504 | i = 0; |
745f7a8c NTND |
505 | for (ref = *refs; ref; ref = next) { |
506 | int keep = 0; | |
507 | next = ref->next; | |
f2db854d | 508 | |
745f7a8c NTND |
509 | if (!memcmp(ref->name, "refs/", 5) && |
510 | check_refname_format(ref->name + 5, 0)) | |
511 | ; /* trash */ | |
512 | else { | |
f2db854d JH |
513 | while (i < nr_sought) { |
514 | int cmp = strcmp(ref->name, sought[i]->name); | |
745f7a8c NTND |
515 | if (cmp < 0) |
516 | break; /* definitely do not have it */ | |
517 | else if (cmp == 0) { | |
518 | keep = 1; /* definitely have it */ | |
f2db854d | 519 | sought[i]->matched = 1; |
745f7a8c | 520 | } |
f2db854d | 521 | i++; |
745f7a8c NTND |
522 | } |
523 | } | |
524 | ||
f2db854d | 525 | if (!keep && args->fetch_all && |
745f7a8c NTND |
526 | (!args->depth || prefixcmp(ref->name, "refs/tags/"))) |
527 | keep = 1; | |
528 | ||
529 | if (keep) { | |
530 | *newtail = ref; | |
531 | ref->next = NULL; | |
532 | newtail = &ref->next; | |
533 | } else { | |
534 | free(ref); | |
535 | } | |
536 | } | |
537 | ||
6e7b66ee JH |
538 | /* Append unmatched requests to the list */ |
539 | if (allow_tip_sha1_in_want) { | |
540 | for (i = 0; i < nr_sought; i++) { | |
541 | ref = sought[i]; | |
542 | if (ref->matched) | |
543 | continue; | |
544 | if (get_sha1_hex(ref->name, ref->old_sha1)) | |
545 | continue; | |
546 | ||
547 | ref->matched = 1; | |
548 | *newtail = ref; | |
549 | ref->next = NULL; | |
550 | newtail = &ref->next; | |
551 | } | |
552 | } | |
745f7a8c NTND |
553 | *refs = newlist; |
554 | } | |
555 | ||
556 | static void mark_alternate_complete(const struct ref *ref, void *unused) | |
557 | { | |
558 | mark_complete(NULL, ref->old_sha1, 0, NULL); | |
559 | } | |
560 | ||
561 | static int everything_local(struct fetch_pack_args *args, | |
f2db854d JH |
562 | struct ref **refs, |
563 | struct ref **sought, int nr_sought) | |
745f7a8c NTND |
564 | { |
565 | struct ref *ref; | |
566 | int retval; | |
567 | unsigned long cutoff = 0; | |
568 | ||
569 | save_commit_buffer = 0; | |
570 | ||
571 | for (ref = *refs; ref; ref = ref->next) { | |
572 | struct object *o; | |
573 | ||
012a1bb5 JH |
574 | if (!has_sha1_file(ref->old_sha1)) |
575 | continue; | |
576 | ||
745f7a8c NTND |
577 | o = parse_object(ref->old_sha1); |
578 | if (!o) | |
579 | continue; | |
580 | ||
581 | /* We already have it -- which may mean that we were | |
582 | * in sync with the other side at some time after | |
583 | * that (it is OK if we guess wrong here). | |
584 | */ | |
585 | if (o->type == OBJ_COMMIT) { | |
586 | struct commit *commit = (struct commit *)o; | |
587 | if (!cutoff || cutoff < commit->date) | |
588 | cutoff = commit->date; | |
589 | } | |
590 | } | |
591 | ||
592 | if (!args->depth) { | |
593 | for_each_ref(mark_complete, NULL); | |
594 | for_each_alternate_ref(mark_alternate_complete, NULL); | |
16445242 | 595 | commit_list_sort_by_date(&complete); |
745f7a8c NTND |
596 | if (cutoff) |
597 | mark_recent_complete_commits(args, cutoff); | |
598 | } | |
599 | ||
600 | /* | |
601 | * Mark all complete remote refs as common refs. | |
602 | * Don't mark them common yet; the server has to be told so first. | |
603 | */ | |
604 | for (ref = *refs; ref; ref = ref->next) { | |
605 | struct object *o = deref_tag(lookup_object(ref->old_sha1), | |
606 | NULL, 0); | |
607 | ||
608 | if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) | |
609 | continue; | |
610 | ||
611 | if (!(o->flags & SEEN)) { | |
612 | rev_list_push((struct commit *)o, COMMON_REF | SEEN); | |
613 | ||
614 | mark_common((struct commit *)o, 1, 1); | |
615 | } | |
616 | } | |
617 | ||
f2db854d | 618 | filter_refs(args, refs, sought, nr_sought); |
745f7a8c NTND |
619 | |
620 | for (retval = 1, ref = *refs; ref ; ref = ref->next) { | |
621 | const unsigned char *remote = ref->old_sha1; | |
622 | unsigned char local[20]; | |
623 | struct object *o; | |
624 | ||
625 | o = lookup_object(remote); | |
626 | if (!o || !(o->flags & COMPLETE)) { | |
627 | retval = 0; | |
628 | if (!args->verbose) | |
629 | continue; | |
630 | fprintf(stderr, | |
631 | "want %s (%s)\n", sha1_to_hex(remote), | |
632 | ref->name); | |
633 | continue; | |
634 | } | |
635 | ||
636 | hashcpy(ref->new_sha1, local); | |
637 | if (!args->verbose) | |
638 | continue; | |
639 | fprintf(stderr, | |
640 | "already have %s (%s)\n", sha1_to_hex(remote), | |
641 | ref->name); | |
642 | } | |
643 | return retval; | |
644 | } | |
645 | ||
646 | static int sideband_demux(int in, int out, void *data) | |
647 | { | |
648 | int *xd = data; | |
649 | ||
650 | int ret = recv_sideband("fetch-pack", xd[0], out); | |
651 | close(out); | |
652 | return ret; | |
653 | } | |
654 | ||
655 | static int get_pack(struct fetch_pack_args *args, | |
656 | int xd[2], char **pack_lockfile) | |
657 | { | |
658 | struct async demux; | |
6035d6aa | 659 | const char *argv[22]; |
745f7a8c NTND |
660 | char keep_arg[256]; |
661 | char hdr_arg[256]; | |
662 | const char **av; | |
663 | int do_keep = args->keep_pack; | |
664 | struct child_process cmd; | |
c6807a40 | 665 | int ret; |
745f7a8c NTND |
666 | |
667 | memset(&demux, 0, sizeof(demux)); | |
668 | if (use_sideband) { | |
669 | /* xd[] is talking with upload-pack; subprocess reads from | |
670 | * xd[0], spits out band#2 to stderr, and feeds us band#1 | |
671 | * through demux->out. | |
672 | */ | |
673 | demux.proc = sideband_demux; | |
674 | demux.data = xd; | |
675 | demux.out = -1; | |
676 | if (start_async(&demux)) | |
677 | die("fetch-pack: unable to fork off sideband" | |
678 | " demultiplexer"); | |
679 | } | |
680 | else | |
681 | demux.out = xd[0]; | |
682 | ||
683 | memset(&cmd, 0, sizeof(cmd)); | |
684 | cmd.argv = argv; | |
685 | av = argv; | |
686 | *hdr_arg = 0; | |
687 | if (!args->keep_pack && unpack_limit) { | |
688 | struct pack_header header; | |
689 | ||
690 | if (read_pack_header(demux.out, &header)) | |
691 | die("protocol error: bad pack header"); | |
692 | snprintf(hdr_arg, sizeof(hdr_arg), | |
693 | "--pack_header=%"PRIu32",%"PRIu32, | |
694 | ntohl(header.hdr_version), ntohl(header.hdr_entries)); | |
695 | if (ntohl(header.hdr_entries) < unpack_limit) | |
696 | do_keep = 0; | |
697 | else | |
698 | do_keep = 1; | |
699 | } | |
700 | ||
6035d6aa NTND |
701 | if (alternate_shallow_file) { |
702 | *av++ = "--shallow-file"; | |
703 | *av++ = alternate_shallow_file; | |
704 | } | |
705 | ||
745f7a8c NTND |
706 | if (do_keep) { |
707 | if (pack_lockfile) | |
708 | cmd.out = -1; | |
709 | *av++ = "index-pack"; | |
710 | *av++ = "--stdin"; | |
711 | if (!args->quiet && !args->no_progress) | |
712 | *av++ = "-v"; | |
713 | if (args->use_thin_pack) | |
714 | *av++ = "--fix-thin"; | |
715 | if (args->lock_pack || unpack_limit) { | |
716 | int s = sprintf(keep_arg, | |
717 | "--keep=fetch-pack %"PRIuMAX " on ", (uintmax_t) getpid()); | |
718 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) | |
719 | strcpy(keep_arg + s, "localhost"); | |
720 | *av++ = keep_arg; | |
721 | } | |
c6807a40 NTND |
722 | if (args->check_self_contained_and_connected) |
723 | *av++ = "--check-self-contained-and-connected"; | |
745f7a8c NTND |
724 | } |
725 | else { | |
726 | *av++ = "unpack-objects"; | |
727 | if (args->quiet || args->no_progress) | |
728 | *av++ = "-q"; | |
c6807a40 | 729 | args->check_self_contained_and_connected = 0; |
745f7a8c NTND |
730 | } |
731 | if (*hdr_arg) | |
732 | *av++ = hdr_arg; | |
733 | if (fetch_fsck_objects >= 0 | |
734 | ? fetch_fsck_objects | |
735 | : transfer_fsck_objects >= 0 | |
736 | ? transfer_fsck_objects | |
737 | : 0) | |
738 | *av++ = "--strict"; | |
739 | *av++ = NULL; | |
740 | ||
741 | cmd.in = demux.out; | |
742 | cmd.git_cmd = 1; | |
743 | if (start_command(&cmd)) | |
744 | die("fetch-pack: unable to fork off %s", argv[0]); | |
745 | if (do_keep && pack_lockfile) { | |
746 | *pack_lockfile = index_pack_lockfile(cmd.out); | |
747 | close(cmd.out); | |
748 | } | |
749 | ||
c6807a40 NTND |
750 | ret = finish_command(&cmd); |
751 | if (!ret || (args->check_self_contained_and_connected && ret == 1)) | |
752 | args->self_contained_and_connected = | |
753 | args->check_self_contained_and_connected && | |
754 | ret == 0; | |
755 | else | |
745f7a8c NTND |
756 | die("%s failed", argv[0]); |
757 | if (use_sideband && finish_async(&demux)) | |
758 | die("error in sideband demultiplexer"); | |
759 | return 0; | |
760 | } | |
761 | ||
f2db854d JH |
762 | static int cmp_ref_by_name(const void *a_, const void *b_) |
763 | { | |
764 | const struct ref *a = *((const struct ref **)a_); | |
765 | const struct ref *b = *((const struct ref **)b_); | |
766 | return strcmp(a->name, b->name); | |
767 | } | |
768 | ||
745f7a8c NTND |
769 | static struct ref *do_fetch_pack(struct fetch_pack_args *args, |
770 | int fd[2], | |
771 | const struct ref *orig_ref, | |
f2db854d | 772 | struct ref **sought, int nr_sought, |
745f7a8c NTND |
773 | char **pack_lockfile) |
774 | { | |
775 | struct ref *ref = copy_ref_list(orig_ref); | |
776 | unsigned char sha1[20]; | |
777 | const char *agent_feature; | |
778 | int agent_len; | |
779 | ||
780 | sort_ref_list(&ref, ref_compare_name); | |
f2db854d | 781 | qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name); |
745f7a8c NTND |
782 | |
783 | if (is_repository_shallow() && !server_supports("shallow")) | |
784 | die("Server does not support shallow clients"); | |
785 | if (server_supports("multi_ack_detailed")) { | |
786 | if (args->verbose) | |
787 | fprintf(stderr, "Server supports multi_ack_detailed\n"); | |
788 | multi_ack = 2; | |
789 | if (server_supports("no-done")) { | |
790 | if (args->verbose) | |
791 | fprintf(stderr, "Server supports no-done\n"); | |
792 | if (args->stateless_rpc) | |
793 | no_done = 1; | |
794 | } | |
795 | } | |
796 | else if (server_supports("multi_ack")) { | |
797 | if (args->verbose) | |
798 | fprintf(stderr, "Server supports multi_ack\n"); | |
799 | multi_ack = 1; | |
800 | } | |
801 | if (server_supports("side-band-64k")) { | |
802 | if (args->verbose) | |
803 | fprintf(stderr, "Server supports side-band-64k\n"); | |
804 | use_sideband = 2; | |
805 | } | |
806 | else if (server_supports("side-band")) { | |
807 | if (args->verbose) | |
808 | fprintf(stderr, "Server supports side-band\n"); | |
809 | use_sideband = 1; | |
810 | } | |
6e7b66ee JH |
811 | if (server_supports("allow-tip-sha1-in-want")) { |
812 | if (args->verbose) | |
813 | fprintf(stderr, "Server supports allow-tip-sha1-in-want\n"); | |
814 | allow_tip_sha1_in_want = 1; | |
815 | } | |
745f7a8c NTND |
816 | if (!server_supports("thin-pack")) |
817 | args->use_thin_pack = 0; | |
818 | if (!server_supports("no-progress")) | |
819 | args->no_progress = 0; | |
820 | if (!server_supports("include-tag")) | |
821 | args->include_tag = 0; | |
822 | if (server_supports("ofs-delta")) { | |
823 | if (args->verbose) | |
824 | fprintf(stderr, "Server supports ofs-delta\n"); | |
825 | } else | |
826 | prefer_ofs_delta = 0; | |
827 | ||
828 | if ((agent_feature = server_feature_value("agent", &agent_len))) { | |
829 | agent_supported = 1; | |
830 | if (args->verbose && agent_len) | |
831 | fprintf(stderr, "Server version is %.*s\n", | |
832 | agent_len, agent_feature); | |
833 | } | |
834 | ||
f2db854d | 835 | if (everything_local(args, &ref, sought, nr_sought)) { |
745f7a8c NTND |
836 | packet_flush(fd[1]); |
837 | goto all_done; | |
838 | } | |
839 | if (find_common(args, fd, sha1, ref) < 0) | |
840 | if (!args->keep_pack) | |
841 | /* When cloning, it is not unusual to have | |
842 | * no common commit. | |
843 | */ | |
844 | warning("no common commits"); | |
845 | ||
846 | if (args->stateless_rpc) | |
847 | packet_flush(fd[1]); | |
6035d6aa | 848 | if (args->depth > 0) |
3125fe52 | 849 | setup_alternate_shallow(&shallow_lock, &alternate_shallow_file); |
6da8bdcb NTND |
850 | else |
851 | alternate_shallow_file = NULL; | |
745f7a8c NTND |
852 | if (get_pack(args, fd, pack_lockfile)) |
853 | die("git fetch-pack: fetch failed."); | |
854 | ||
855 | all_done: | |
856 | return ref; | |
857 | } | |
858 | ||
859 | static int fetch_pack_config(const char *var, const char *value, void *cb) | |
860 | { | |
861 | if (strcmp(var, "fetch.unpacklimit") == 0) { | |
862 | fetch_unpack_limit = git_config_int(var, value); | |
863 | return 0; | |
864 | } | |
865 | ||
866 | if (strcmp(var, "transfer.unpacklimit") == 0) { | |
867 | transfer_unpack_limit = git_config_int(var, value); | |
868 | return 0; | |
869 | } | |
870 | ||
871 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { | |
872 | prefer_ofs_delta = git_config_bool(var, value); | |
873 | return 0; | |
874 | } | |
875 | ||
876 | if (!strcmp(var, "fetch.fsckobjects")) { | |
877 | fetch_fsck_objects = git_config_bool(var, value); | |
878 | return 0; | |
879 | } | |
880 | ||
881 | if (!strcmp(var, "transfer.fsckobjects")) { | |
882 | transfer_fsck_objects = git_config_bool(var, value); | |
883 | return 0; | |
884 | } | |
885 | ||
886 | return git_default_config(var, value, cb); | |
887 | } | |
888 | ||
745f7a8c NTND |
889 | static void fetch_pack_setup(void) |
890 | { | |
891 | static int did_setup; | |
892 | if (did_setup) | |
893 | return; | |
894 | git_config(fetch_pack_config, NULL); | |
895 | if (0 <= transfer_unpack_limit) | |
896 | unpack_limit = transfer_unpack_limit; | |
897 | else if (0 <= fetch_unpack_limit) | |
898 | unpack_limit = fetch_unpack_limit; | |
899 | did_setup = 1; | |
900 | } | |
901 | ||
f2db854d JH |
902 | static int remove_duplicates_in_refs(struct ref **ref, int nr) |
903 | { | |
904 | struct string_list names = STRING_LIST_INIT_NODUP; | |
905 | int src, dst; | |
906 | ||
907 | for (src = dst = 0; src < nr; src++) { | |
908 | struct string_list_item *item; | |
909 | item = string_list_insert(&names, ref[src]->name); | |
910 | if (item->util) | |
911 | continue; /* already have it */ | |
912 | item->util = ref[src]; | |
913 | if (src != dst) | |
914 | ref[dst] = ref[src]; | |
915 | dst++; | |
916 | } | |
917 | for (src = dst; src < nr; src++) | |
918 | ref[src] = NULL; | |
919 | string_list_clear(&names, 0); | |
920 | return dst; | |
921 | } | |
922 | ||
745f7a8c NTND |
923 | struct ref *fetch_pack(struct fetch_pack_args *args, |
924 | int fd[], struct child_process *conn, | |
925 | const struct ref *ref, | |
926 | const char *dest, | |
f2db854d | 927 | struct ref **sought, int nr_sought, |
745f7a8c NTND |
928 | char **pack_lockfile) |
929 | { | |
745f7a8c NTND |
930 | struct ref *ref_cpy; |
931 | ||
932 | fetch_pack_setup(); | |
f2db854d JH |
933 | if (nr_sought) |
934 | nr_sought = remove_duplicates_in_refs(sought, nr_sought); | |
745f7a8c NTND |
935 | |
936 | if (!ref) { | |
937 | packet_flush(fd[1]); | |
938 | die("no matching remote head"); | |
939 | } | |
f2db854d | 940 | ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, pack_lockfile); |
745f7a8c | 941 | |
6da8bdcb | 942 | if (args->depth > 0 && alternate_shallow_file) { |
6035d6aa NTND |
943 | if (*alternate_shallow_file == '\0') { /* --unshallow */ |
944 | unlink_or_warn(git_path("shallow")); | |
945 | rollback_lock_file(&shallow_lock); | |
946 | } else | |
947 | commit_lock_file(&shallow_lock); | |
745f7a8c NTND |
948 | } |
949 | ||
950 | reprepare_packed_git(); | |
951 | return ref_cpy; | |
952 | } |