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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" | |
15 | ||
16 | static int transfer_unpack_limit = -1; | |
17 | static int fetch_unpack_limit = -1; | |
18 | static int unpack_limit = 100; | |
19 | static int prefer_ofs_delta = 1; | |
20 | static int no_done; | |
21 | static int fetch_fsck_objects = -1; | |
22 | static int transfer_fsck_objects = -1; | |
23 | static int agent_supported; | |
6035d6aa NTND |
24 | static struct lock_file shallow_lock; |
25 | static const char *alternate_shallow_file; | |
745f7a8c NTND |
26 | |
27 | #define COMPLETE (1U << 0) | |
28 | #define COMMON (1U << 1) | |
29 | #define COMMON_REF (1U << 2) | |
30 | #define SEEN (1U << 3) | |
31 | #define POPPED (1U << 4) | |
32 | ||
33 | static int marked; | |
34 | ||
35 | /* | |
36 | * After sending this many "have"s if we do not get any new ACK , we | |
37 | * give up traversing our history. | |
38 | */ | |
39 | #define MAX_IN_VAIN 256 | |
40 | ||
41 | static struct commit_list *rev_list; | |
6e7b66ee | 42 | static int non_common_revs, multi_ack, use_sideband, allow_tip_sha1_in_want; |
745f7a8c NTND |
43 | |
44 | static void rev_list_push(struct commit *commit, int mark) | |
45 | { | |
46 | if (!(commit->object.flags & mark)) { | |
47 | commit->object.flags |= mark; | |
48 | ||
49 | if (!(commit->object.parsed)) | |
50 | if (parse_commit(commit)) | |
51 | return; | |
52 | ||
53 | commit_list_insert_by_date(commit, &rev_list); | |
54 | ||
55 | if (!(commit->object.flags & COMMON)) | |
56 | non_common_revs++; | |
57 | } | |
58 | } | |
59 | ||
60 | static int rev_list_insert_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
61 | { | |
62 | struct object *o = deref_tag(parse_object(sha1), refname, 0); | |
63 | ||
64 | if (o && o->type == OBJ_COMMIT) | |
65 | rev_list_push((struct commit *)o, SEEN); | |
66 | ||
67 | return 0; | |
68 | } | |
69 | ||
70 | static int clear_marks(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
71 | { | |
72 | struct object *o = deref_tag(parse_object(sha1), refname, 0); | |
73 | ||
74 | if (o && o->type == OBJ_COMMIT) | |
75 | clear_commit_marks((struct commit *)o, | |
76 | COMMON | COMMON_REF | SEEN | POPPED); | |
77 | return 0; | |
78 | } | |
79 | ||
80 | /* | |
81 | This function marks a rev and its ancestors as common. | |
82 | In some cases, it is desirable to mark only the ancestors (for example | |
83 | when only the server does not yet know that they are common). | |
84 | */ | |
85 | ||
86 | static void mark_common(struct commit *commit, | |
87 | int ancestors_only, int dont_parse) | |
88 | { | |
89 | if (commit != NULL && !(commit->object.flags & COMMON)) { | |
90 | struct object *o = (struct object *)commit; | |
91 | ||
92 | if (!ancestors_only) | |
93 | o->flags |= COMMON; | |
94 | ||
95 | if (!(o->flags & SEEN)) | |
96 | rev_list_push(commit, SEEN); | |
97 | else { | |
98 | struct commit_list *parents; | |
99 | ||
100 | if (!ancestors_only && !(o->flags & POPPED)) | |
101 | non_common_revs--; | |
102 | if (!o->parsed && !dont_parse) | |
103 | if (parse_commit(commit)) | |
104 | return; | |
105 | ||
106 | for (parents = commit->parents; | |
107 | parents; | |
108 | parents = parents->next) | |
109 | mark_common(parents->item, 0, dont_parse); | |
110 | } | |
111 | } | |
112 | } | |
113 | ||
114 | /* | |
115 | Get the next rev to send, ignoring the common. | |
116 | */ | |
117 | ||
118 | static const unsigned char *get_rev(void) | |
119 | { | |
120 | struct commit *commit = NULL; | |
121 | ||
122 | while (commit == NULL) { | |
123 | unsigned int mark; | |
124 | struct commit_list *parents; | |
125 | ||
126 | if (rev_list == NULL || non_common_revs == 0) | |
127 | return NULL; | |
128 | ||
129 | commit = rev_list->item; | |
130 | if (!commit->object.parsed) | |
131 | parse_commit(commit); | |
132 | parents = commit->parents; | |
133 | ||
134 | commit->object.flags |= POPPED; | |
135 | if (!(commit->object.flags & COMMON)) | |
136 | non_common_revs--; | |
137 | ||
138 | if (commit->object.flags & COMMON) { | |
139 | /* do not send "have", and ignore ancestors */ | |
140 | commit = NULL; | |
141 | mark = COMMON | SEEN; | |
142 | } else if (commit->object.flags & COMMON_REF) | |
143 | /* send "have", and ignore ancestors */ | |
144 | mark = COMMON | SEEN; | |
145 | else | |
146 | /* send "have", also for its ancestors */ | |
147 | mark = SEEN; | |
148 | ||
149 | while (parents) { | |
150 | if (!(parents->item->object.flags & SEEN)) | |
151 | rev_list_push(parents->item, mark); | |
152 | if (mark & COMMON) | |
153 | mark_common(parents->item, 1, 0); | |
154 | parents = parents->next; | |
155 | } | |
156 | ||
157 | rev_list = rev_list->next; | |
158 | } | |
159 | ||
160 | return commit->object.sha1; | |
161 | } | |
162 | ||
163 | enum ack_type { | |
164 | NAK = 0, | |
165 | ACK, | |
166 | ACK_continue, | |
167 | ACK_common, | |
168 | ACK_ready | |
169 | }; | |
170 | ||
171 | static void consume_shallow_list(struct fetch_pack_args *args, int fd) | |
172 | { | |
173 | if (args->stateless_rpc && args->depth > 0) { | |
174 | /* If we sent a depth we will get back "duplicate" | |
175 | * shallow and unshallow commands every time there | |
176 | * is a block of have lines exchanged. | |
177 | */ | |
74543a04 JK |
178 | char *line; |
179 | while ((line = packet_read_line(fd, NULL))) { | |
745f7a8c NTND |
180 | if (!prefixcmp(line, "shallow ")) |
181 | continue; | |
182 | if (!prefixcmp(line, "unshallow ")) | |
183 | continue; | |
184 | die("git fetch-pack: expected shallow list"); | |
185 | } | |
186 | } | |
187 | } | |
188 | ||
189 | struct write_shallow_data { | |
190 | struct strbuf *out; | |
191 | int use_pack_protocol; | |
192 | int count; | |
193 | }; | |
194 | ||
195 | static int write_one_shallow(const struct commit_graft *graft, void *cb_data) | |
196 | { | |
197 | struct write_shallow_data *data = cb_data; | |
198 | const char *hex = sha1_to_hex(graft->sha1); | |
199 | data->count++; | |
200 | if (data->use_pack_protocol) | |
201 | packet_buf_write(data->out, "shallow %s", hex); | |
202 | else { | |
203 | strbuf_addstr(data->out, hex); | |
204 | strbuf_addch(data->out, '\n'); | |
205 | } | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static int write_shallow_commits(struct strbuf *out, int use_pack_protocol) | |
210 | { | |
211 | struct write_shallow_data data; | |
212 | data.out = out; | |
213 | data.use_pack_protocol = use_pack_protocol; | |
214 | data.count = 0; | |
215 | for_each_commit_graft(write_one_shallow, &data); | |
216 | return data.count; | |
217 | } | |
218 | ||
219 | static enum ack_type get_ack(int fd, unsigned char *result_sha1) | |
220 | { | |
74543a04 JK |
221 | int len; |
222 | char *line = packet_read_line(fd, &len); | |
745f7a8c NTND |
223 | |
224 | if (!len) | |
225 | die("git fetch-pack: expected ACK/NAK, got EOF"); | |
745f7a8c NTND |
226 | if (!strcmp(line, "NAK")) |
227 | return NAK; | |
228 | if (!prefixcmp(line, "ACK ")) { | |
229 | if (!get_sha1_hex(line+4, result_sha1)) { | |
030e9dd6 JK |
230 | if (len < 45) |
231 | return ACK; | |
745f7a8c NTND |
232 | if (strstr(line+45, "continue")) |
233 | return ACK_continue; | |
234 | if (strstr(line+45, "common")) | |
235 | return ACK_common; | |
236 | if (strstr(line+45, "ready")) | |
237 | return ACK_ready; | |
238 | return ACK; | |
239 | } | |
240 | } | |
241 | die("git fetch_pack: expected ACK/NAK, got '%s'", line); | |
242 | } | |
243 | ||
244 | static void send_request(struct fetch_pack_args *args, | |
245 | int fd, struct strbuf *buf) | |
246 | { | |
247 | if (args->stateless_rpc) { | |
248 | send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); | |
249 | packet_flush(fd); | |
250 | } else | |
cdf4fb8e | 251 | write_or_die(fd, buf->buf, buf->len); |
745f7a8c NTND |
252 | } |
253 | ||
254 | static void insert_one_alternate_ref(const struct ref *ref, void *unused) | |
255 | { | |
256 | rev_list_insert_ref(NULL, ref->old_sha1, 0, NULL); | |
257 | } | |
258 | ||
259 | #define INITIAL_FLUSH 16 | |
260 | #define PIPESAFE_FLUSH 32 | |
261 | #define LARGE_FLUSH 1024 | |
262 | ||
263 | static int next_flush(struct fetch_pack_args *args, int count) | |
264 | { | |
265 | int flush_limit = args->stateless_rpc ? LARGE_FLUSH : PIPESAFE_FLUSH; | |
266 | ||
267 | if (count < flush_limit) | |
268 | count <<= 1; | |
269 | else | |
270 | count += flush_limit; | |
271 | return count; | |
272 | } | |
273 | ||
274 | static int find_common(struct fetch_pack_args *args, | |
275 | int fd[2], unsigned char *result_sha1, | |
276 | struct ref *refs) | |
277 | { | |
278 | int fetching; | |
279 | int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; | |
280 | const unsigned char *sha1; | |
281 | unsigned in_vain = 0; | |
282 | int got_continue = 0; | |
283 | int got_ready = 0; | |
284 | struct strbuf req_buf = STRBUF_INIT; | |
285 | size_t state_len = 0; | |
286 | ||
287 | if (args->stateless_rpc && multi_ack == 1) | |
288 | die("--stateless-rpc requires multi_ack_detailed"); | |
289 | if (marked) | |
290 | for_each_ref(clear_marks, NULL); | |
291 | marked = 1; | |
292 | ||
293 | for_each_ref(rev_list_insert_ref, NULL); | |
294 | for_each_alternate_ref(insert_one_alternate_ref, NULL); | |
295 | ||
296 | fetching = 0; | |
297 | for ( ; refs ; refs = refs->next) { | |
298 | unsigned char *remote = refs->old_sha1; | |
299 | const char *remote_hex; | |
300 | struct object *o; | |
301 | ||
302 | /* | |
303 | * If that object is complete (i.e. it is an ancestor of a | |
304 | * local ref), we tell them we have it but do not have to | |
305 | * tell them about its ancestors, which they already know | |
306 | * about. | |
307 | * | |
308 | * We use lookup_object here because we are only | |
309 | * interested in the case we *know* the object is | |
310 | * reachable and we have already scanned it. | |
311 | */ | |
312 | if (((o = lookup_object(remote)) != NULL) && | |
313 | (o->flags & COMPLETE)) { | |
314 | continue; | |
315 | } | |
316 | ||
317 | remote_hex = sha1_to_hex(remote); | |
318 | if (!fetching) { | |
319 | struct strbuf c = STRBUF_INIT; | |
320 | if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); | |
321 | if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); | |
322 | if (no_done) strbuf_addstr(&c, " no-done"); | |
323 | if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); | |
324 | if (use_sideband == 1) strbuf_addstr(&c, " side-band"); | |
325 | if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); | |
326 | if (args->no_progress) strbuf_addstr(&c, " no-progress"); | |
327 | if (args->include_tag) strbuf_addstr(&c, " include-tag"); | |
328 | if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); | |
329 | if (agent_supported) strbuf_addf(&c, " agent=%s", | |
330 | git_user_agent_sanitized()); | |
331 | packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); | |
332 | strbuf_release(&c); | |
333 | } else | |
334 | packet_buf_write(&req_buf, "want %s\n", remote_hex); | |
335 | fetching++; | |
336 | } | |
337 | ||
338 | if (!fetching) { | |
339 | strbuf_release(&req_buf); | |
340 | packet_flush(fd[1]); | |
341 | return 1; | |
342 | } | |
343 | ||
344 | if (is_repository_shallow()) | |
345 | write_shallow_commits(&req_buf, 1); | |
346 | if (args->depth > 0) | |
347 | packet_buf_write(&req_buf, "deepen %d", args->depth); | |
348 | packet_buf_flush(&req_buf); | |
349 | state_len = req_buf.len; | |
350 | ||
351 | if (args->depth > 0) { | |
74543a04 | 352 | char *line; |
745f7a8c NTND |
353 | unsigned char sha1[20]; |
354 | ||
355 | send_request(args, fd[1], &req_buf); | |
74543a04 | 356 | while ((line = packet_read_line(fd[0], NULL))) { |
745f7a8c NTND |
357 | if (!prefixcmp(line, "shallow ")) { |
358 | if (get_sha1_hex(line + 8, sha1)) | |
359 | die("invalid shallow line: %s", line); | |
360 | register_shallow(sha1); | |
361 | continue; | |
362 | } | |
363 | if (!prefixcmp(line, "unshallow ")) { | |
364 | if (get_sha1_hex(line + 10, sha1)) | |
365 | die("invalid unshallow line: %s", line); | |
366 | if (!lookup_object(sha1)) | |
367 | die("object not found: %s", line); | |
368 | /* make sure that it is parsed as shallow */ | |
369 | if (!parse_object(sha1)) | |
370 | die("error in object: %s", line); | |
371 | if (unregister_shallow(sha1)) | |
372 | die("no shallow found: %s", line); | |
373 | continue; | |
374 | } | |
375 | die("expected shallow/unshallow, got %s", line); | |
376 | } | |
377 | } else if (!args->stateless_rpc) | |
378 | send_request(args, fd[1], &req_buf); | |
379 | ||
380 | if (!args->stateless_rpc) { | |
381 | /* If we aren't using the stateless-rpc interface | |
382 | * we don't need to retain the headers. | |
383 | */ | |
384 | strbuf_setlen(&req_buf, 0); | |
385 | state_len = 0; | |
386 | } | |
387 | ||
388 | flushes = 0; | |
389 | retval = -1; | |
390 | while ((sha1 = get_rev())) { | |
391 | packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1)); | |
392 | if (args->verbose) | |
393 | fprintf(stderr, "have %s\n", sha1_to_hex(sha1)); | |
394 | in_vain++; | |
395 | if (flush_at <= ++count) { | |
396 | int ack; | |
397 | ||
398 | packet_buf_flush(&req_buf); | |
399 | send_request(args, fd[1], &req_buf); | |
400 | strbuf_setlen(&req_buf, state_len); | |
401 | flushes++; | |
402 | flush_at = next_flush(args, count); | |
403 | ||
404 | /* | |
405 | * We keep one window "ahead" of the other side, and | |
406 | * will wait for an ACK only on the next one | |
407 | */ | |
408 | if (!args->stateless_rpc && count == INITIAL_FLUSH) | |
409 | continue; | |
410 | ||
411 | consume_shallow_list(args, fd[0]); | |
412 | do { | |
413 | ack = get_ack(fd[0], result_sha1); | |
414 | if (args->verbose && ack) | |
415 | fprintf(stderr, "got ack %d %s\n", ack, | |
416 | sha1_to_hex(result_sha1)); | |
417 | switch (ack) { | |
418 | case ACK: | |
419 | flushes = 0; | |
420 | multi_ack = 0; | |
421 | retval = 0; | |
422 | goto done; | |
423 | case ACK_common: | |
424 | case ACK_ready: | |
425 | case ACK_continue: { | |
426 | struct commit *commit = | |
427 | lookup_commit(result_sha1); | |
428 | if (!commit) | |
429 | die("invalid commit %s", sha1_to_hex(result_sha1)); | |
430 | if (args->stateless_rpc | |
431 | && ack == ACK_common | |
432 | && !(commit->object.flags & COMMON)) { | |
433 | /* We need to replay the have for this object | |
434 | * on the next RPC request so the peer knows | |
435 | * it is in common with us. | |
436 | */ | |
437 | const char *hex = sha1_to_hex(result_sha1); | |
438 | packet_buf_write(&req_buf, "have %s\n", hex); | |
439 | state_len = req_buf.len; | |
440 | } | |
441 | mark_common(commit, 0, 1); | |
442 | retval = 0; | |
443 | in_vain = 0; | |
444 | got_continue = 1; | |
445 | if (ack == ACK_ready) { | |
446 | rev_list = NULL; | |
447 | got_ready = 1; | |
448 | } | |
449 | break; | |
450 | } | |
451 | } | |
452 | } while (ack); | |
453 | flushes--; | |
454 | if (got_continue && MAX_IN_VAIN < in_vain) { | |
455 | if (args->verbose) | |
456 | fprintf(stderr, "giving up\n"); | |
457 | break; /* give up */ | |
458 | } | |
459 | } | |
460 | } | |
461 | done: | |
462 | if (!got_ready || !no_done) { | |
463 | packet_buf_write(&req_buf, "done\n"); | |
464 | send_request(args, fd[1], &req_buf); | |
465 | } | |
466 | if (args->verbose) | |
467 | fprintf(stderr, "done\n"); | |
468 | if (retval != 0) { | |
469 | multi_ack = 0; | |
470 | flushes++; | |
471 | } | |
472 | strbuf_release(&req_buf); | |
473 | ||
474 | consume_shallow_list(args, fd[0]); | |
475 | while (flushes || multi_ack) { | |
476 | int ack = get_ack(fd[0], result_sha1); | |
477 | if (ack) { | |
478 | if (args->verbose) | |
479 | fprintf(stderr, "got ack (%d) %s\n", ack, | |
480 | sha1_to_hex(result_sha1)); | |
481 | if (ack == ACK) | |
482 | return 0; | |
483 | multi_ack = 1; | |
484 | continue; | |
485 | } | |
486 | flushes--; | |
487 | } | |
488 | /* it is no error to fetch into a completely empty repo */ | |
489 | return count ? retval : 0; | |
490 | } | |
491 | ||
492 | static struct commit_list *complete; | |
493 | ||
494 | static int mark_complete(const char *refname, const unsigned char *sha1, int flag, void *cb_data) | |
495 | { | |
496 | struct object *o = parse_object(sha1); | |
497 | ||
498 | while (o && o->type == OBJ_TAG) { | |
499 | struct tag *t = (struct tag *) o; | |
500 | if (!t->tagged) | |
501 | break; /* broken repository */ | |
502 | o->flags |= COMPLETE; | |
503 | o = parse_object(t->tagged->sha1); | |
504 | } | |
505 | if (o && o->type == OBJ_COMMIT) { | |
506 | struct commit *commit = (struct commit *)o; | |
507 | if (!(commit->object.flags & COMPLETE)) { | |
508 | commit->object.flags |= COMPLETE; | |
509 | commit_list_insert_by_date(commit, &complete); | |
510 | } | |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static void mark_recent_complete_commits(struct fetch_pack_args *args, | |
516 | unsigned long cutoff) | |
517 | { | |
518 | while (complete && cutoff <= complete->item->date) { | |
519 | if (args->verbose) | |
520 | fprintf(stderr, "Marking %s as complete\n", | |
521 | sha1_to_hex(complete->item->object.sha1)); | |
522 | pop_most_recent_commit(&complete, COMPLETE); | |
523 | } | |
524 | } | |
525 | ||
745f7a8c | 526 | static void filter_refs(struct fetch_pack_args *args, |
f2db854d JH |
527 | struct ref **refs, |
528 | struct ref **sought, int nr_sought) | |
745f7a8c NTND |
529 | { |
530 | struct ref *newlist = NULL; | |
531 | struct ref **newtail = &newlist; | |
532 | struct ref *ref, *next; | |
f2db854d | 533 | int i; |
745f7a8c | 534 | |
f2db854d | 535 | i = 0; |
745f7a8c NTND |
536 | for (ref = *refs; ref; ref = next) { |
537 | int keep = 0; | |
538 | next = ref->next; | |
f2db854d | 539 | |
745f7a8c NTND |
540 | if (!memcmp(ref->name, "refs/", 5) && |
541 | check_refname_format(ref->name + 5, 0)) | |
542 | ; /* trash */ | |
543 | else { | |
f2db854d JH |
544 | while (i < nr_sought) { |
545 | int cmp = strcmp(ref->name, sought[i]->name); | |
745f7a8c NTND |
546 | if (cmp < 0) |
547 | break; /* definitely do not have it */ | |
548 | else if (cmp == 0) { | |
549 | keep = 1; /* definitely have it */ | |
f2db854d | 550 | sought[i]->matched = 1; |
745f7a8c | 551 | } |
f2db854d | 552 | i++; |
745f7a8c NTND |
553 | } |
554 | } | |
555 | ||
f2db854d | 556 | if (!keep && args->fetch_all && |
745f7a8c NTND |
557 | (!args->depth || prefixcmp(ref->name, "refs/tags/"))) |
558 | keep = 1; | |
559 | ||
560 | if (keep) { | |
561 | *newtail = ref; | |
562 | ref->next = NULL; | |
563 | newtail = &ref->next; | |
564 | } else { | |
565 | free(ref); | |
566 | } | |
567 | } | |
568 | ||
6e7b66ee JH |
569 | /* Append unmatched requests to the list */ |
570 | if (allow_tip_sha1_in_want) { | |
571 | for (i = 0; i < nr_sought; i++) { | |
572 | ref = sought[i]; | |
573 | if (ref->matched) | |
574 | continue; | |
575 | if (get_sha1_hex(ref->name, ref->old_sha1)) | |
576 | continue; | |
577 | ||
578 | ref->matched = 1; | |
579 | *newtail = ref; | |
580 | ref->next = NULL; | |
581 | newtail = &ref->next; | |
582 | } | |
583 | } | |
745f7a8c NTND |
584 | *refs = newlist; |
585 | } | |
586 | ||
587 | static void mark_alternate_complete(const struct ref *ref, void *unused) | |
588 | { | |
589 | mark_complete(NULL, ref->old_sha1, 0, NULL); | |
590 | } | |
591 | ||
592 | static int everything_local(struct fetch_pack_args *args, | |
f2db854d JH |
593 | struct ref **refs, |
594 | struct ref **sought, int nr_sought) | |
745f7a8c NTND |
595 | { |
596 | struct ref *ref; | |
597 | int retval; | |
598 | unsigned long cutoff = 0; | |
599 | ||
600 | save_commit_buffer = 0; | |
601 | ||
602 | for (ref = *refs; ref; ref = ref->next) { | |
603 | struct object *o; | |
604 | ||
012a1bb5 JH |
605 | if (!has_sha1_file(ref->old_sha1)) |
606 | continue; | |
607 | ||
745f7a8c NTND |
608 | o = parse_object(ref->old_sha1); |
609 | if (!o) | |
610 | continue; | |
611 | ||
612 | /* We already have it -- which may mean that we were | |
613 | * in sync with the other side at some time after | |
614 | * that (it is OK if we guess wrong here). | |
615 | */ | |
616 | if (o->type == OBJ_COMMIT) { | |
617 | struct commit *commit = (struct commit *)o; | |
618 | if (!cutoff || cutoff < commit->date) | |
619 | cutoff = commit->date; | |
620 | } | |
621 | } | |
622 | ||
623 | if (!args->depth) { | |
624 | for_each_ref(mark_complete, NULL); | |
625 | for_each_alternate_ref(mark_alternate_complete, NULL); | |
626 | if (cutoff) | |
627 | mark_recent_complete_commits(args, cutoff); | |
628 | } | |
629 | ||
630 | /* | |
631 | * Mark all complete remote refs as common refs. | |
632 | * Don't mark them common yet; the server has to be told so first. | |
633 | */ | |
634 | for (ref = *refs; ref; ref = ref->next) { | |
635 | struct object *o = deref_tag(lookup_object(ref->old_sha1), | |
636 | NULL, 0); | |
637 | ||
638 | if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) | |
639 | continue; | |
640 | ||
641 | if (!(o->flags & SEEN)) { | |
642 | rev_list_push((struct commit *)o, COMMON_REF | SEEN); | |
643 | ||
644 | mark_common((struct commit *)o, 1, 1); | |
645 | } | |
646 | } | |
647 | ||
f2db854d | 648 | filter_refs(args, refs, sought, nr_sought); |
745f7a8c NTND |
649 | |
650 | for (retval = 1, ref = *refs; ref ; ref = ref->next) { | |
651 | const unsigned char *remote = ref->old_sha1; | |
652 | unsigned char local[20]; | |
653 | struct object *o; | |
654 | ||
655 | o = lookup_object(remote); | |
656 | if (!o || !(o->flags & COMPLETE)) { | |
657 | retval = 0; | |
658 | if (!args->verbose) | |
659 | continue; | |
660 | fprintf(stderr, | |
661 | "want %s (%s)\n", sha1_to_hex(remote), | |
662 | ref->name); | |
663 | continue; | |
664 | } | |
665 | ||
666 | hashcpy(ref->new_sha1, local); | |
667 | if (!args->verbose) | |
668 | continue; | |
669 | fprintf(stderr, | |
670 | "already have %s (%s)\n", sha1_to_hex(remote), | |
671 | ref->name); | |
672 | } | |
673 | return retval; | |
674 | } | |
675 | ||
676 | static int sideband_demux(int in, int out, void *data) | |
677 | { | |
678 | int *xd = data; | |
679 | ||
680 | int ret = recv_sideband("fetch-pack", xd[0], out); | |
681 | close(out); | |
682 | return ret; | |
683 | } | |
684 | ||
685 | static int get_pack(struct fetch_pack_args *args, | |
686 | int xd[2], char **pack_lockfile) | |
687 | { | |
688 | struct async demux; | |
6035d6aa | 689 | const char *argv[22]; |
745f7a8c NTND |
690 | char keep_arg[256]; |
691 | char hdr_arg[256]; | |
692 | const char **av; | |
693 | int do_keep = args->keep_pack; | |
694 | struct child_process cmd; | |
c6807a40 | 695 | int ret; |
745f7a8c NTND |
696 | |
697 | memset(&demux, 0, sizeof(demux)); | |
698 | if (use_sideband) { | |
699 | /* xd[] is talking with upload-pack; subprocess reads from | |
700 | * xd[0], spits out band#2 to stderr, and feeds us band#1 | |
701 | * through demux->out. | |
702 | */ | |
703 | demux.proc = sideband_demux; | |
704 | demux.data = xd; | |
705 | demux.out = -1; | |
706 | if (start_async(&demux)) | |
707 | die("fetch-pack: unable to fork off sideband" | |
708 | " demultiplexer"); | |
709 | } | |
710 | else | |
711 | demux.out = xd[0]; | |
712 | ||
713 | memset(&cmd, 0, sizeof(cmd)); | |
714 | cmd.argv = argv; | |
715 | av = argv; | |
716 | *hdr_arg = 0; | |
717 | if (!args->keep_pack && unpack_limit) { | |
718 | struct pack_header header; | |
719 | ||
720 | if (read_pack_header(demux.out, &header)) | |
721 | die("protocol error: bad pack header"); | |
722 | snprintf(hdr_arg, sizeof(hdr_arg), | |
723 | "--pack_header=%"PRIu32",%"PRIu32, | |
724 | ntohl(header.hdr_version), ntohl(header.hdr_entries)); | |
725 | if (ntohl(header.hdr_entries) < unpack_limit) | |
726 | do_keep = 0; | |
727 | else | |
728 | do_keep = 1; | |
729 | } | |
730 | ||
6035d6aa NTND |
731 | if (alternate_shallow_file) { |
732 | *av++ = "--shallow-file"; | |
733 | *av++ = alternate_shallow_file; | |
734 | } | |
735 | ||
745f7a8c NTND |
736 | if (do_keep) { |
737 | if (pack_lockfile) | |
738 | cmd.out = -1; | |
739 | *av++ = "index-pack"; | |
740 | *av++ = "--stdin"; | |
741 | if (!args->quiet && !args->no_progress) | |
742 | *av++ = "-v"; | |
743 | if (args->use_thin_pack) | |
744 | *av++ = "--fix-thin"; | |
745 | if (args->lock_pack || unpack_limit) { | |
746 | int s = sprintf(keep_arg, | |
747 | "--keep=fetch-pack %"PRIuMAX " on ", (uintmax_t) getpid()); | |
748 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) | |
749 | strcpy(keep_arg + s, "localhost"); | |
750 | *av++ = keep_arg; | |
751 | } | |
c6807a40 NTND |
752 | if (args->check_self_contained_and_connected) |
753 | *av++ = "--check-self-contained-and-connected"; | |
745f7a8c NTND |
754 | } |
755 | else { | |
756 | *av++ = "unpack-objects"; | |
757 | if (args->quiet || args->no_progress) | |
758 | *av++ = "-q"; | |
c6807a40 | 759 | args->check_self_contained_and_connected = 0; |
745f7a8c NTND |
760 | } |
761 | if (*hdr_arg) | |
762 | *av++ = hdr_arg; | |
763 | if (fetch_fsck_objects >= 0 | |
764 | ? fetch_fsck_objects | |
765 | : transfer_fsck_objects >= 0 | |
766 | ? transfer_fsck_objects | |
767 | : 0) | |
768 | *av++ = "--strict"; | |
769 | *av++ = NULL; | |
770 | ||
771 | cmd.in = demux.out; | |
772 | cmd.git_cmd = 1; | |
773 | if (start_command(&cmd)) | |
774 | die("fetch-pack: unable to fork off %s", argv[0]); | |
775 | if (do_keep && pack_lockfile) { | |
776 | *pack_lockfile = index_pack_lockfile(cmd.out); | |
777 | close(cmd.out); | |
778 | } | |
779 | ||
c6807a40 NTND |
780 | ret = finish_command(&cmd); |
781 | if (!ret || (args->check_self_contained_and_connected && ret == 1)) | |
782 | args->self_contained_and_connected = | |
783 | args->check_self_contained_and_connected && | |
784 | ret == 0; | |
785 | else | |
745f7a8c NTND |
786 | die("%s failed", argv[0]); |
787 | if (use_sideband && finish_async(&demux)) | |
788 | die("error in sideband demultiplexer"); | |
789 | return 0; | |
790 | } | |
791 | ||
f2db854d JH |
792 | static int cmp_ref_by_name(const void *a_, const void *b_) |
793 | { | |
794 | const struct ref *a = *((const struct ref **)a_); | |
795 | const struct ref *b = *((const struct ref **)b_); | |
796 | return strcmp(a->name, b->name); | |
797 | } | |
798 | ||
6035d6aa NTND |
799 | static void setup_alternate_shallow(void) |
800 | { | |
801 | struct strbuf sb = STRBUF_INIT; | |
802 | int fd; | |
803 | ||
804 | check_shallow_file_for_update(); | |
805 | fd = hold_lock_file_for_update(&shallow_lock, git_path("shallow"), | |
806 | LOCK_DIE_ON_ERROR); | |
807 | if (write_shallow_commits(&sb, 0)) { | |
808 | if (write_in_full(fd, sb.buf, sb.len) != sb.len) | |
809 | die_errno("failed to write to %s", shallow_lock.filename); | |
810 | alternate_shallow_file = shallow_lock.filename; | |
811 | } else | |
812 | /* | |
813 | * is_repository_shallow() sees empty string as "no | |
814 | * shallow file". | |
815 | */ | |
816 | alternate_shallow_file = ""; | |
817 | strbuf_release(&sb); | |
818 | } | |
819 | ||
745f7a8c NTND |
820 | static struct ref *do_fetch_pack(struct fetch_pack_args *args, |
821 | int fd[2], | |
822 | const struct ref *orig_ref, | |
f2db854d | 823 | struct ref **sought, int nr_sought, |
745f7a8c NTND |
824 | char **pack_lockfile) |
825 | { | |
826 | struct ref *ref = copy_ref_list(orig_ref); | |
827 | unsigned char sha1[20]; | |
828 | const char *agent_feature; | |
829 | int agent_len; | |
830 | ||
831 | sort_ref_list(&ref, ref_compare_name); | |
f2db854d | 832 | qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name); |
745f7a8c NTND |
833 | |
834 | if (is_repository_shallow() && !server_supports("shallow")) | |
835 | die("Server does not support shallow clients"); | |
836 | if (server_supports("multi_ack_detailed")) { | |
837 | if (args->verbose) | |
838 | fprintf(stderr, "Server supports multi_ack_detailed\n"); | |
839 | multi_ack = 2; | |
840 | if (server_supports("no-done")) { | |
841 | if (args->verbose) | |
842 | fprintf(stderr, "Server supports no-done\n"); | |
843 | if (args->stateless_rpc) | |
844 | no_done = 1; | |
845 | } | |
846 | } | |
847 | else if (server_supports("multi_ack")) { | |
848 | if (args->verbose) | |
849 | fprintf(stderr, "Server supports multi_ack\n"); | |
850 | multi_ack = 1; | |
851 | } | |
852 | if (server_supports("side-band-64k")) { | |
853 | if (args->verbose) | |
854 | fprintf(stderr, "Server supports side-band-64k\n"); | |
855 | use_sideband = 2; | |
856 | } | |
857 | else if (server_supports("side-band")) { | |
858 | if (args->verbose) | |
859 | fprintf(stderr, "Server supports side-band\n"); | |
860 | use_sideband = 1; | |
861 | } | |
6e7b66ee JH |
862 | if (server_supports("allow-tip-sha1-in-want")) { |
863 | if (args->verbose) | |
864 | fprintf(stderr, "Server supports allow-tip-sha1-in-want\n"); | |
865 | allow_tip_sha1_in_want = 1; | |
866 | } | |
745f7a8c NTND |
867 | if (!server_supports("thin-pack")) |
868 | args->use_thin_pack = 0; | |
869 | if (!server_supports("no-progress")) | |
870 | args->no_progress = 0; | |
871 | if (!server_supports("include-tag")) | |
872 | args->include_tag = 0; | |
873 | if (server_supports("ofs-delta")) { | |
874 | if (args->verbose) | |
875 | fprintf(stderr, "Server supports ofs-delta\n"); | |
876 | } else | |
877 | prefer_ofs_delta = 0; | |
878 | ||
879 | if ((agent_feature = server_feature_value("agent", &agent_len))) { | |
880 | agent_supported = 1; | |
881 | if (args->verbose && agent_len) | |
882 | fprintf(stderr, "Server version is %.*s\n", | |
883 | agent_len, agent_feature); | |
884 | } | |
885 | ||
f2db854d | 886 | if (everything_local(args, &ref, sought, nr_sought)) { |
745f7a8c NTND |
887 | packet_flush(fd[1]); |
888 | goto all_done; | |
889 | } | |
890 | if (find_common(args, fd, sha1, ref) < 0) | |
891 | if (!args->keep_pack) | |
892 | /* When cloning, it is not unusual to have | |
893 | * no common commit. | |
894 | */ | |
895 | warning("no common commits"); | |
896 | ||
897 | if (args->stateless_rpc) | |
898 | packet_flush(fd[1]); | |
6035d6aa NTND |
899 | if (args->depth > 0) |
900 | setup_alternate_shallow(); | |
745f7a8c NTND |
901 | if (get_pack(args, fd, pack_lockfile)) |
902 | die("git fetch-pack: fetch failed."); | |
903 | ||
904 | all_done: | |
905 | return ref; | |
906 | } | |
907 | ||
908 | static int fetch_pack_config(const char *var, const char *value, void *cb) | |
909 | { | |
910 | if (strcmp(var, "fetch.unpacklimit") == 0) { | |
911 | fetch_unpack_limit = git_config_int(var, value); | |
912 | return 0; | |
913 | } | |
914 | ||
915 | if (strcmp(var, "transfer.unpacklimit") == 0) { | |
916 | transfer_unpack_limit = git_config_int(var, value); | |
917 | return 0; | |
918 | } | |
919 | ||
920 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { | |
921 | prefer_ofs_delta = git_config_bool(var, value); | |
922 | return 0; | |
923 | } | |
924 | ||
925 | if (!strcmp(var, "fetch.fsckobjects")) { | |
926 | fetch_fsck_objects = git_config_bool(var, value); | |
927 | return 0; | |
928 | } | |
929 | ||
930 | if (!strcmp(var, "transfer.fsckobjects")) { | |
931 | transfer_fsck_objects = git_config_bool(var, value); | |
932 | return 0; | |
933 | } | |
934 | ||
935 | return git_default_config(var, value, cb); | |
936 | } | |
937 | ||
745f7a8c NTND |
938 | static void fetch_pack_setup(void) |
939 | { | |
940 | static int did_setup; | |
941 | if (did_setup) | |
942 | return; | |
943 | git_config(fetch_pack_config, NULL); | |
944 | if (0 <= transfer_unpack_limit) | |
945 | unpack_limit = transfer_unpack_limit; | |
946 | else if (0 <= fetch_unpack_limit) | |
947 | unpack_limit = fetch_unpack_limit; | |
948 | did_setup = 1; | |
949 | } | |
950 | ||
f2db854d JH |
951 | static int remove_duplicates_in_refs(struct ref **ref, int nr) |
952 | { | |
953 | struct string_list names = STRING_LIST_INIT_NODUP; | |
954 | int src, dst; | |
955 | ||
956 | for (src = dst = 0; src < nr; src++) { | |
957 | struct string_list_item *item; | |
958 | item = string_list_insert(&names, ref[src]->name); | |
959 | if (item->util) | |
960 | continue; /* already have it */ | |
961 | item->util = ref[src]; | |
962 | if (src != dst) | |
963 | ref[dst] = ref[src]; | |
964 | dst++; | |
965 | } | |
966 | for (src = dst; src < nr; src++) | |
967 | ref[src] = NULL; | |
968 | string_list_clear(&names, 0); | |
969 | return dst; | |
970 | } | |
971 | ||
745f7a8c NTND |
972 | struct ref *fetch_pack(struct fetch_pack_args *args, |
973 | int fd[], struct child_process *conn, | |
974 | const struct ref *ref, | |
975 | const char *dest, | |
f2db854d | 976 | struct ref **sought, int nr_sought, |
745f7a8c NTND |
977 | char **pack_lockfile) |
978 | { | |
745f7a8c NTND |
979 | struct ref *ref_cpy; |
980 | ||
981 | fetch_pack_setup(); | |
f2db854d JH |
982 | if (nr_sought) |
983 | nr_sought = remove_duplicates_in_refs(sought, nr_sought); | |
745f7a8c NTND |
984 | |
985 | if (!ref) { | |
986 | packet_flush(fd[1]); | |
987 | die("no matching remote head"); | |
988 | } | |
f2db854d | 989 | ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, pack_lockfile); |
745f7a8c | 990 | |
6035d6aa NTND |
991 | if (alternate_shallow_file) { |
992 | if (*alternate_shallow_file == '\0') { /* --unshallow */ | |
993 | unlink_or_warn(git_path("shallow")); | |
994 | rollback_lock_file(&shallow_lock); | |
995 | } else | |
996 | commit_lock_file(&shallow_lock); | |
745f7a8c NTND |
997 | } |
998 | ||
999 | reprepare_packed_git(); | |
1000 | return ref_cpy; | |
1001 | } |