]>
Commit | Line | Data |
---|---|---|
1 | #include "cache.h" | |
2 | #include "repository.h" | |
3 | #include "config.h" | |
4 | #include "lockfile.h" | |
5 | #include "refs.h" | |
6 | #include "pkt-line.h" | |
7 | #include "commit.h" | |
8 | #include "tag.h" | |
9 | #include "exec-cmd.h" | |
10 | #include "pack.h" | |
11 | #include "sideband.h" | |
12 | #include "fetch-pack.h" | |
13 | #include "remote.h" | |
14 | #include "run-command.h" | |
15 | #include "connect.h" | |
16 | #include "transport.h" | |
17 | #include "version.h" | |
18 | #include "oid-array.h" | |
19 | #include "oidset.h" | |
20 | #include "packfile.h" | |
21 | #include "object-store.h" | |
22 | #include "connected.h" | |
23 | #include "fetch-negotiator.h" | |
24 | #include "fsck.h" | |
25 | #include "shallow.h" | |
26 | ||
27 | static int transfer_unpack_limit = -1; | |
28 | static int fetch_unpack_limit = -1; | |
29 | static int unpack_limit = 100; | |
30 | static int prefer_ofs_delta = 1; | |
31 | static int no_done; | |
32 | static int deepen_since_ok; | |
33 | static int deepen_not_ok; | |
34 | static int fetch_fsck_objects = -1; | |
35 | static int transfer_fsck_objects = -1; | |
36 | static int agent_supported; | |
37 | static int server_supports_filtering; | |
38 | static int advertise_sid; | |
39 | static struct shallow_lock shallow_lock; | |
40 | static const char *alternate_shallow_file; | |
41 | static struct strbuf fsck_msg_types = STRBUF_INIT; | |
42 | static struct string_list uri_protocols = STRING_LIST_INIT_DUP; | |
43 | ||
44 | /* Remember to update object flag allocation in object.h */ | |
45 | #define COMPLETE (1U << 0) | |
46 | #define ALTERNATE (1U << 1) | |
47 | ||
48 | /* | |
49 | * After sending this many "have"s if we do not get any new ACK , we | |
50 | * give up traversing our history. | |
51 | */ | |
52 | #define MAX_IN_VAIN 256 | |
53 | ||
54 | static int multi_ack, use_sideband; | |
55 | /* Allow specifying sha1 if it is a ref tip. */ | |
56 | #define ALLOW_TIP_SHA1 01 | |
57 | /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ | |
58 | #define ALLOW_REACHABLE_SHA1 02 | |
59 | static unsigned int allow_unadvertised_object_request; | |
60 | ||
61 | __attribute__((format (printf, 2, 3))) | |
62 | static inline void print_verbose(const struct fetch_pack_args *args, | |
63 | const char *fmt, ...) | |
64 | { | |
65 | va_list params; | |
66 | ||
67 | if (!args->verbose) | |
68 | return; | |
69 | ||
70 | va_start(params, fmt); | |
71 | vfprintf(stderr, fmt, params); | |
72 | va_end(params); | |
73 | fputc('\n', stderr); | |
74 | } | |
75 | ||
76 | struct alternate_object_cache { | |
77 | struct object **items; | |
78 | size_t nr, alloc; | |
79 | }; | |
80 | ||
81 | static void cache_one_alternate(const struct object_id *oid, | |
82 | void *vcache) | |
83 | { | |
84 | struct alternate_object_cache *cache = vcache; | |
85 | struct object *obj = parse_object(the_repository, oid); | |
86 | ||
87 | if (!obj || (obj->flags & ALTERNATE)) | |
88 | return; | |
89 | ||
90 | obj->flags |= ALTERNATE; | |
91 | ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc); | |
92 | cache->items[cache->nr++] = obj; | |
93 | } | |
94 | ||
95 | static void for_each_cached_alternate(struct fetch_negotiator *negotiator, | |
96 | void (*cb)(struct fetch_negotiator *, | |
97 | struct object *)) | |
98 | { | |
99 | static int initialized; | |
100 | static struct alternate_object_cache cache; | |
101 | size_t i; | |
102 | ||
103 | if (!initialized) { | |
104 | for_each_alternate_ref(cache_one_alternate, &cache); | |
105 | initialized = 1; | |
106 | } | |
107 | ||
108 | for (i = 0; i < cache.nr; i++) | |
109 | cb(negotiator, cache.items[i]); | |
110 | } | |
111 | ||
112 | static struct commit *deref_without_lazy_fetch(const struct object_id *oid, | |
113 | int mark_tags_complete) | |
114 | { | |
115 | enum object_type type; | |
116 | struct object_info info = { .typep = &type }; | |
117 | ||
118 | while (1) { | |
119 | if (oid_object_info_extended(the_repository, oid, &info, | |
120 | OBJECT_INFO_SKIP_FETCH_OBJECT | OBJECT_INFO_QUICK)) | |
121 | return NULL; | |
122 | if (type == OBJ_TAG) { | |
123 | struct tag *tag = (struct tag *) | |
124 | parse_object(the_repository, oid); | |
125 | ||
126 | if (!tag->tagged) | |
127 | return NULL; | |
128 | if (mark_tags_complete) | |
129 | tag->object.flags |= COMPLETE; | |
130 | oid = &tag->tagged->oid; | |
131 | } else { | |
132 | break; | |
133 | } | |
134 | } | |
135 | if (type == OBJ_COMMIT) | |
136 | return (struct commit *) parse_object(the_repository, oid); | |
137 | return NULL; | |
138 | } | |
139 | ||
140 | static int rev_list_insert_ref(struct fetch_negotiator *negotiator, | |
141 | const struct object_id *oid) | |
142 | { | |
143 | struct commit *c = deref_without_lazy_fetch(oid, 0); | |
144 | ||
145 | if (c) | |
146 | negotiator->add_tip(negotiator, c); | |
147 | return 0; | |
148 | } | |
149 | ||
150 | static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid, | |
151 | int flag, void *cb_data) | |
152 | { | |
153 | return rev_list_insert_ref(cb_data, oid); | |
154 | } | |
155 | ||
156 | enum ack_type { | |
157 | NAK = 0, | |
158 | ACK, | |
159 | ACK_continue, | |
160 | ACK_common, | |
161 | ACK_ready | |
162 | }; | |
163 | ||
164 | static void consume_shallow_list(struct fetch_pack_args *args, | |
165 | struct packet_reader *reader) | |
166 | { | |
167 | if (args->stateless_rpc && args->deepen) { | |
168 | /* If we sent a depth we will get back "duplicate" | |
169 | * shallow and unshallow commands every time there | |
170 | * is a block of have lines exchanged. | |
171 | */ | |
172 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
173 | if (starts_with(reader->line, "shallow ")) | |
174 | continue; | |
175 | if (starts_with(reader->line, "unshallow ")) | |
176 | continue; | |
177 | die(_("git fetch-pack: expected shallow list")); | |
178 | } | |
179 | if (reader->status != PACKET_READ_FLUSH) | |
180 | die(_("git fetch-pack: expected a flush packet after shallow list")); | |
181 | } | |
182 | } | |
183 | ||
184 | static enum ack_type get_ack(struct packet_reader *reader, | |
185 | struct object_id *result_oid) | |
186 | { | |
187 | int len; | |
188 | const char *arg; | |
189 | ||
190 | if (packet_reader_read(reader) != PACKET_READ_NORMAL) | |
191 | die(_("git fetch-pack: expected ACK/NAK, got a flush packet")); | |
192 | len = reader->pktlen; | |
193 | ||
194 | if (!strcmp(reader->line, "NAK")) | |
195 | return NAK; | |
196 | if (skip_prefix(reader->line, "ACK ", &arg)) { | |
197 | const char *p; | |
198 | if (!parse_oid_hex(arg, result_oid, &p)) { | |
199 | len -= p - reader->line; | |
200 | if (len < 1) | |
201 | return ACK; | |
202 | if (strstr(p, "continue")) | |
203 | return ACK_continue; | |
204 | if (strstr(p, "common")) | |
205 | return ACK_common; | |
206 | if (strstr(p, "ready")) | |
207 | return ACK_ready; | |
208 | return ACK; | |
209 | } | |
210 | } | |
211 | die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line); | |
212 | } | |
213 | ||
214 | static void send_request(struct fetch_pack_args *args, | |
215 | int fd, struct strbuf *buf) | |
216 | { | |
217 | if (args->stateless_rpc) { | |
218 | send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); | |
219 | packet_flush(fd); | |
220 | } else { | |
221 | if (write_in_full(fd, buf->buf, buf->len) < 0) | |
222 | die_errno(_("unable to write to remote")); | |
223 | } | |
224 | } | |
225 | ||
226 | static void insert_one_alternate_object(struct fetch_negotiator *negotiator, | |
227 | struct object *obj) | |
228 | { | |
229 | rev_list_insert_ref(negotiator, &obj->oid); | |
230 | } | |
231 | ||
232 | #define INITIAL_FLUSH 16 | |
233 | #define PIPESAFE_FLUSH 32 | |
234 | #define LARGE_FLUSH 16384 | |
235 | ||
236 | static int next_flush(int stateless_rpc, int count) | |
237 | { | |
238 | if (stateless_rpc) { | |
239 | if (count < LARGE_FLUSH) | |
240 | count <<= 1; | |
241 | else | |
242 | count = count * 11 / 10; | |
243 | } else { | |
244 | if (count < PIPESAFE_FLUSH) | |
245 | count <<= 1; | |
246 | else | |
247 | count += PIPESAFE_FLUSH; | |
248 | } | |
249 | return count; | |
250 | } | |
251 | ||
252 | static void mark_tips(struct fetch_negotiator *negotiator, | |
253 | const struct oid_array *negotiation_tips) | |
254 | { | |
255 | int i; | |
256 | ||
257 | if (!negotiation_tips) { | |
258 | for_each_rawref(rev_list_insert_ref_oid, negotiator); | |
259 | return; | |
260 | } | |
261 | ||
262 | for (i = 0; i < negotiation_tips->nr; i++) | |
263 | rev_list_insert_ref(negotiator, &negotiation_tips->oid[i]); | |
264 | return; | |
265 | } | |
266 | ||
267 | static int find_common(struct fetch_negotiator *negotiator, | |
268 | struct fetch_pack_args *args, | |
269 | int fd[2], struct object_id *result_oid, | |
270 | struct ref *refs) | |
271 | { | |
272 | int fetching; | |
273 | int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; | |
274 | const struct object_id *oid; | |
275 | unsigned in_vain = 0; | |
276 | int got_continue = 0; | |
277 | int got_ready = 0; | |
278 | struct strbuf req_buf = STRBUF_INIT; | |
279 | size_t state_len = 0; | |
280 | struct packet_reader reader; | |
281 | ||
282 | if (args->stateless_rpc && multi_ack == 1) | |
283 | die(_("--stateless-rpc requires multi_ack_detailed")); | |
284 | ||
285 | packet_reader_init(&reader, fd[0], NULL, 0, | |
286 | PACKET_READ_CHOMP_NEWLINE | | |
287 | PACKET_READ_DIE_ON_ERR_PACKET); | |
288 | ||
289 | mark_tips(negotiator, args->negotiation_tips); | |
290 | for_each_cached_alternate(negotiator, insert_one_alternate_object); | |
291 | ||
292 | fetching = 0; | |
293 | for ( ; refs ; refs = refs->next) { | |
294 | struct object_id *remote = &refs->old_oid; | |
295 | const char *remote_hex; | |
296 | struct object *o; | |
297 | ||
298 | /* | |
299 | * If that object is complete (i.e. it is an ancestor of a | |
300 | * local ref), we tell them we have it but do not have to | |
301 | * tell them about its ancestors, which they already know | |
302 | * about. | |
303 | * | |
304 | * We use lookup_object here because we are only | |
305 | * interested in the case we *know* the object is | |
306 | * reachable and we have already scanned it. | |
307 | */ | |
308 | if (((o = lookup_object(the_repository, remote)) != NULL) && | |
309 | (o->flags & COMPLETE)) { | |
310 | continue; | |
311 | } | |
312 | ||
313 | remote_hex = oid_to_hex(remote); | |
314 | if (!fetching) { | |
315 | struct strbuf c = STRBUF_INIT; | |
316 | if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); | |
317 | if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); | |
318 | if (no_done) strbuf_addstr(&c, " no-done"); | |
319 | if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); | |
320 | if (use_sideband == 1) strbuf_addstr(&c, " side-band"); | |
321 | if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative"); | |
322 | if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); | |
323 | if (args->no_progress) strbuf_addstr(&c, " no-progress"); | |
324 | if (args->include_tag) strbuf_addstr(&c, " include-tag"); | |
325 | if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); | |
326 | if (deepen_since_ok) strbuf_addstr(&c, " deepen-since"); | |
327 | if (deepen_not_ok) strbuf_addstr(&c, " deepen-not"); | |
328 | if (agent_supported) strbuf_addf(&c, " agent=%s", | |
329 | git_user_agent_sanitized()); | |
330 | if (advertise_sid) | |
331 | strbuf_addf(&c, " session-id=%s", trace2_session_id()); | |
332 | if (args->filter_options.choice) | |
333 | strbuf_addstr(&c, " filter"); | |
334 | packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); | |
335 | strbuf_release(&c); | |
336 | } else | |
337 | packet_buf_write(&req_buf, "want %s\n", remote_hex); | |
338 | fetching++; | |
339 | } | |
340 | ||
341 | if (!fetching) { | |
342 | strbuf_release(&req_buf); | |
343 | packet_flush(fd[1]); | |
344 | return 1; | |
345 | } | |
346 | ||
347 | if (is_repository_shallow(the_repository)) | |
348 | write_shallow_commits(&req_buf, 1, NULL); | |
349 | if (args->depth > 0) | |
350 | packet_buf_write(&req_buf, "deepen %d", args->depth); | |
351 | if (args->deepen_since) { | |
352 | timestamp_t max_age = approxidate(args->deepen_since); | |
353 | packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age); | |
354 | } | |
355 | if (args->deepen_not) { | |
356 | int i; | |
357 | for (i = 0; i < args->deepen_not->nr; i++) { | |
358 | struct string_list_item *s = args->deepen_not->items + i; | |
359 | packet_buf_write(&req_buf, "deepen-not %s", s->string); | |
360 | } | |
361 | } | |
362 | if (server_supports_filtering && args->filter_options.choice) { | |
363 | const char *spec = | |
364 | expand_list_objects_filter_spec(&args->filter_options); | |
365 | packet_buf_write(&req_buf, "filter %s", spec); | |
366 | } | |
367 | packet_buf_flush(&req_buf); | |
368 | state_len = req_buf.len; | |
369 | ||
370 | if (args->deepen) { | |
371 | const char *arg; | |
372 | struct object_id oid; | |
373 | ||
374 | send_request(args, fd[1], &req_buf); | |
375 | while (packet_reader_read(&reader) == PACKET_READ_NORMAL) { | |
376 | if (skip_prefix(reader.line, "shallow ", &arg)) { | |
377 | if (get_oid_hex(arg, &oid)) | |
378 | die(_("invalid shallow line: %s"), reader.line); | |
379 | register_shallow(the_repository, &oid); | |
380 | continue; | |
381 | } | |
382 | if (skip_prefix(reader.line, "unshallow ", &arg)) { | |
383 | if (get_oid_hex(arg, &oid)) | |
384 | die(_("invalid unshallow line: %s"), reader.line); | |
385 | if (!lookup_object(the_repository, &oid)) | |
386 | die(_("object not found: %s"), reader.line); | |
387 | /* make sure that it is parsed as shallow */ | |
388 | if (!parse_object(the_repository, &oid)) | |
389 | die(_("error in object: %s"), reader.line); | |
390 | if (unregister_shallow(&oid)) | |
391 | die(_("no shallow found: %s"), reader.line); | |
392 | continue; | |
393 | } | |
394 | die(_("expected shallow/unshallow, got %s"), reader.line); | |
395 | } | |
396 | } else if (!args->stateless_rpc) | |
397 | send_request(args, fd[1], &req_buf); | |
398 | ||
399 | if (!args->stateless_rpc) { | |
400 | /* If we aren't using the stateless-rpc interface | |
401 | * we don't need to retain the headers. | |
402 | */ | |
403 | strbuf_setlen(&req_buf, 0); | |
404 | state_len = 0; | |
405 | } | |
406 | ||
407 | trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository); | |
408 | flushes = 0; | |
409 | retval = -1; | |
410 | while ((oid = negotiator->next(negotiator))) { | |
411 | packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid)); | |
412 | print_verbose(args, "have %s", oid_to_hex(oid)); | |
413 | in_vain++; | |
414 | if (flush_at <= ++count) { | |
415 | int ack; | |
416 | ||
417 | packet_buf_flush(&req_buf); | |
418 | send_request(args, fd[1], &req_buf); | |
419 | strbuf_setlen(&req_buf, state_len); | |
420 | flushes++; | |
421 | flush_at = next_flush(args->stateless_rpc, count); | |
422 | ||
423 | /* | |
424 | * We keep one window "ahead" of the other side, and | |
425 | * will wait for an ACK only on the next one | |
426 | */ | |
427 | if (!args->stateless_rpc && count == INITIAL_FLUSH) | |
428 | continue; | |
429 | ||
430 | consume_shallow_list(args, &reader); | |
431 | do { | |
432 | ack = get_ack(&reader, result_oid); | |
433 | if (ack) | |
434 | print_verbose(args, _("got %s %d %s"), "ack", | |
435 | ack, oid_to_hex(result_oid)); | |
436 | switch (ack) { | |
437 | case ACK: | |
438 | flushes = 0; | |
439 | multi_ack = 0; | |
440 | retval = 0; | |
441 | goto done; | |
442 | case ACK_common: | |
443 | case ACK_ready: | |
444 | case ACK_continue: { | |
445 | struct commit *commit = | |
446 | lookup_commit(the_repository, | |
447 | result_oid); | |
448 | int was_common; | |
449 | ||
450 | if (!commit) | |
451 | die(_("invalid commit %s"), oid_to_hex(result_oid)); | |
452 | was_common = negotiator->ack(negotiator, commit); | |
453 | if (args->stateless_rpc | |
454 | && ack == ACK_common | |
455 | && !was_common) { | |
456 | /* We need to replay the have for this object | |
457 | * on the next RPC request so the peer knows | |
458 | * it is in common with us. | |
459 | */ | |
460 | const char *hex = oid_to_hex(result_oid); | |
461 | packet_buf_write(&req_buf, "have %s\n", hex); | |
462 | state_len = req_buf.len; | |
463 | /* | |
464 | * Reset in_vain because an ack | |
465 | * for this commit has not been | |
466 | * seen. | |
467 | */ | |
468 | in_vain = 0; | |
469 | } else if (!args->stateless_rpc | |
470 | || ack != ACK_common) | |
471 | in_vain = 0; | |
472 | retval = 0; | |
473 | got_continue = 1; | |
474 | if (ack == ACK_ready) | |
475 | got_ready = 1; | |
476 | break; | |
477 | } | |
478 | } | |
479 | } while (ack); | |
480 | flushes--; | |
481 | if (got_continue && MAX_IN_VAIN < in_vain) { | |
482 | print_verbose(args, _("giving up")); | |
483 | break; /* give up */ | |
484 | } | |
485 | if (got_ready) | |
486 | break; | |
487 | } | |
488 | } | |
489 | done: | |
490 | trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository); | |
491 | if (!got_ready || !no_done) { | |
492 | packet_buf_write(&req_buf, "done\n"); | |
493 | send_request(args, fd[1], &req_buf); | |
494 | } | |
495 | print_verbose(args, _("done")); | |
496 | if (retval != 0) { | |
497 | multi_ack = 0; | |
498 | flushes++; | |
499 | } | |
500 | strbuf_release(&req_buf); | |
501 | ||
502 | if (!got_ready || !no_done) | |
503 | consume_shallow_list(args, &reader); | |
504 | while (flushes || multi_ack) { | |
505 | int ack = get_ack(&reader, result_oid); | |
506 | if (ack) { | |
507 | print_verbose(args, _("got %s (%d) %s"), "ack", | |
508 | ack, oid_to_hex(result_oid)); | |
509 | if (ack == ACK) | |
510 | return 0; | |
511 | multi_ack = 1; | |
512 | continue; | |
513 | } | |
514 | flushes--; | |
515 | } | |
516 | /* it is no error to fetch into a completely empty repo */ | |
517 | return count ? retval : 0; | |
518 | } | |
519 | ||
520 | static struct commit_list *complete; | |
521 | ||
522 | static int mark_complete(const struct object_id *oid) | |
523 | { | |
524 | struct commit *commit = deref_without_lazy_fetch(oid, 1); | |
525 | ||
526 | if (commit && !(commit->object.flags & COMPLETE)) { | |
527 | commit->object.flags |= COMPLETE; | |
528 | commit_list_insert(commit, &complete); | |
529 | } | |
530 | return 0; | |
531 | } | |
532 | ||
533 | static int mark_complete_oid(const char *refname, const struct object_id *oid, | |
534 | int flag, void *cb_data) | |
535 | { | |
536 | return mark_complete(oid); | |
537 | } | |
538 | ||
539 | static void mark_recent_complete_commits(struct fetch_pack_args *args, | |
540 | timestamp_t cutoff) | |
541 | { | |
542 | while (complete && cutoff <= complete->item->date) { | |
543 | print_verbose(args, _("Marking %s as complete"), | |
544 | oid_to_hex(&complete->item->object.oid)); | |
545 | pop_most_recent_commit(&complete, COMPLETE); | |
546 | } | |
547 | } | |
548 | ||
549 | static void add_refs_to_oidset(struct oidset *oids, struct ref *refs) | |
550 | { | |
551 | for (; refs; refs = refs->next) | |
552 | oidset_insert(oids, &refs->old_oid); | |
553 | } | |
554 | ||
555 | static int is_unmatched_ref(const struct ref *ref) | |
556 | { | |
557 | struct object_id oid; | |
558 | const char *p; | |
559 | return ref->match_status == REF_NOT_MATCHED && | |
560 | !parse_oid_hex(ref->name, &oid, &p) && | |
561 | *p == '\0' && | |
562 | oideq(&oid, &ref->old_oid); | |
563 | } | |
564 | ||
565 | static void filter_refs(struct fetch_pack_args *args, | |
566 | struct ref **refs, | |
567 | struct ref **sought, int nr_sought) | |
568 | { | |
569 | struct ref *newlist = NULL; | |
570 | struct ref **newtail = &newlist; | |
571 | struct ref *unmatched = NULL; | |
572 | struct ref *ref, *next; | |
573 | struct oidset tip_oids = OIDSET_INIT; | |
574 | int i; | |
575 | int strict = !(allow_unadvertised_object_request & | |
576 | (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); | |
577 | ||
578 | i = 0; | |
579 | for (ref = *refs; ref; ref = next) { | |
580 | int keep = 0; | |
581 | next = ref->next; | |
582 | ||
583 | if (starts_with(ref->name, "refs/") && | |
584 | check_refname_format(ref->name, 0)) { | |
585 | /* | |
586 | * trash or a peeled value; do not even add it to | |
587 | * unmatched list | |
588 | */ | |
589 | free_one_ref(ref); | |
590 | continue; | |
591 | } else { | |
592 | while (i < nr_sought) { | |
593 | int cmp = strcmp(ref->name, sought[i]->name); | |
594 | if (cmp < 0) | |
595 | break; /* definitely do not have it */ | |
596 | else if (cmp == 0) { | |
597 | keep = 1; /* definitely have it */ | |
598 | sought[i]->match_status = REF_MATCHED; | |
599 | } | |
600 | i++; | |
601 | } | |
602 | ||
603 | if (!keep && args->fetch_all && | |
604 | (!args->deepen || !starts_with(ref->name, "refs/tags/"))) | |
605 | keep = 1; | |
606 | } | |
607 | ||
608 | if (keep) { | |
609 | *newtail = ref; | |
610 | ref->next = NULL; | |
611 | newtail = &ref->next; | |
612 | } else { | |
613 | ref->next = unmatched; | |
614 | unmatched = ref; | |
615 | } | |
616 | } | |
617 | ||
618 | if (strict) { | |
619 | for (i = 0; i < nr_sought; i++) { | |
620 | ref = sought[i]; | |
621 | if (!is_unmatched_ref(ref)) | |
622 | continue; | |
623 | ||
624 | add_refs_to_oidset(&tip_oids, unmatched); | |
625 | add_refs_to_oidset(&tip_oids, newlist); | |
626 | break; | |
627 | } | |
628 | } | |
629 | ||
630 | /* Append unmatched requests to the list */ | |
631 | for (i = 0; i < nr_sought; i++) { | |
632 | ref = sought[i]; | |
633 | if (!is_unmatched_ref(ref)) | |
634 | continue; | |
635 | ||
636 | if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) { | |
637 | ref->match_status = REF_MATCHED; | |
638 | *newtail = copy_ref(ref); | |
639 | newtail = &(*newtail)->next; | |
640 | } else { | |
641 | ref->match_status = REF_UNADVERTISED_NOT_ALLOWED; | |
642 | } | |
643 | } | |
644 | ||
645 | oidset_clear(&tip_oids); | |
646 | free_refs(unmatched); | |
647 | ||
648 | *refs = newlist; | |
649 | } | |
650 | ||
651 | static void mark_alternate_complete(struct fetch_negotiator *unused, | |
652 | struct object *obj) | |
653 | { | |
654 | mark_complete(&obj->oid); | |
655 | } | |
656 | ||
657 | struct loose_object_iter { | |
658 | struct oidset *loose_object_set; | |
659 | struct ref *refs; | |
660 | }; | |
661 | ||
662 | /* | |
663 | * Mark recent commits available locally and reachable from a local ref as | |
664 | * COMPLETE. | |
665 | * | |
666 | * The cutoff time for recency is determined by this heuristic: it is the | |
667 | * earliest commit time of the objects in refs that are commits and that we know | |
668 | * the commit time of. | |
669 | */ | |
670 | static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator, | |
671 | struct fetch_pack_args *args, | |
672 | struct ref **refs) | |
673 | { | |
674 | struct ref *ref; | |
675 | int old_save_commit_buffer = save_commit_buffer; | |
676 | timestamp_t cutoff = 0; | |
677 | ||
678 | save_commit_buffer = 0; | |
679 | ||
680 | trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL); | |
681 | for (ref = *refs; ref; ref = ref->next) { | |
682 | struct object *o; | |
683 | ||
684 | if (!has_object_file_with_flags(&ref->old_oid, | |
685 | OBJECT_INFO_QUICK | | |
686 | OBJECT_INFO_SKIP_FETCH_OBJECT)) | |
687 | continue; | |
688 | o = parse_object(the_repository, &ref->old_oid); | |
689 | if (!o) | |
690 | continue; | |
691 | ||
692 | /* | |
693 | * We already have it -- which may mean that we were | |
694 | * in sync with the other side at some time after | |
695 | * that (it is OK if we guess wrong here). | |
696 | */ | |
697 | if (o->type == OBJ_COMMIT) { | |
698 | struct commit *commit = (struct commit *)o; | |
699 | if (!cutoff || cutoff < commit->date) | |
700 | cutoff = commit->date; | |
701 | } | |
702 | } | |
703 | trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL); | |
704 | ||
705 | /* | |
706 | * This block marks all local refs as COMPLETE, and then recursively marks all | |
707 | * parents of those refs as COMPLETE. | |
708 | */ | |
709 | trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL); | |
710 | if (!args->deepen) { | |
711 | for_each_rawref(mark_complete_oid, NULL); | |
712 | for_each_cached_alternate(NULL, mark_alternate_complete); | |
713 | commit_list_sort_by_date(&complete); | |
714 | if (cutoff) | |
715 | mark_recent_complete_commits(args, cutoff); | |
716 | } | |
717 | trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL); | |
718 | ||
719 | /* | |
720 | * Mark all complete remote refs as common refs. | |
721 | * Don't mark them common yet; the server has to be told so first. | |
722 | */ | |
723 | trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL); | |
724 | for (ref = *refs; ref; ref = ref->next) { | |
725 | struct commit *c = deref_without_lazy_fetch(&ref->old_oid, 0); | |
726 | ||
727 | if (!c || !(c->object.flags & COMPLETE)) | |
728 | continue; | |
729 | ||
730 | negotiator->known_common(negotiator, c); | |
731 | } | |
732 | trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL); | |
733 | ||
734 | save_commit_buffer = old_save_commit_buffer; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Returns 1 if every object pointed to by the given remote refs is available | |
739 | * locally and reachable from a local ref, and 0 otherwise. | |
740 | */ | |
741 | static int everything_local(struct fetch_pack_args *args, | |
742 | struct ref **refs) | |
743 | { | |
744 | struct ref *ref; | |
745 | int retval; | |
746 | ||
747 | for (retval = 1, ref = *refs; ref ; ref = ref->next) { | |
748 | const struct object_id *remote = &ref->old_oid; | |
749 | struct object *o; | |
750 | ||
751 | o = lookup_object(the_repository, remote); | |
752 | if (!o || !(o->flags & COMPLETE)) { | |
753 | retval = 0; | |
754 | print_verbose(args, "want %s (%s)", oid_to_hex(remote), | |
755 | ref->name); | |
756 | continue; | |
757 | } | |
758 | print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote), | |
759 | ref->name); | |
760 | } | |
761 | ||
762 | return retval; | |
763 | } | |
764 | ||
765 | static int sideband_demux(int in, int out, void *data) | |
766 | { | |
767 | int *xd = data; | |
768 | int ret; | |
769 | ||
770 | ret = recv_sideband("fetch-pack", xd[0], out); | |
771 | close(out); | |
772 | return ret; | |
773 | } | |
774 | ||
775 | static void write_promisor_file(const char *keep_name, | |
776 | struct ref **sought, int nr_sought) | |
777 | { | |
778 | struct strbuf promisor_name = STRBUF_INIT; | |
779 | int suffix_stripped; | |
780 | FILE *output; | |
781 | int i; | |
782 | ||
783 | strbuf_addstr(&promisor_name, keep_name); | |
784 | suffix_stripped = strbuf_strip_suffix(&promisor_name, ".keep"); | |
785 | if (!suffix_stripped) | |
786 | BUG("name of pack lockfile should end with .keep (was '%s')", | |
787 | keep_name); | |
788 | strbuf_addstr(&promisor_name, ".promisor"); | |
789 | ||
790 | output = xfopen(promisor_name.buf, "w"); | |
791 | for (i = 0; i < nr_sought; i++) | |
792 | fprintf(output, "%s %s\n", oid_to_hex(&sought[i]->old_oid), | |
793 | sought[i]->name); | |
794 | fclose(output); | |
795 | ||
796 | strbuf_release(&promisor_name); | |
797 | } | |
798 | ||
799 | /* | |
800 | * Pass 1 as "only_packfile" if the pack received is the only pack in this | |
801 | * fetch request (that is, if there were no packfile URIs provided). | |
802 | */ | |
803 | static int get_pack(struct fetch_pack_args *args, | |
804 | int xd[2], struct string_list *pack_lockfiles, | |
805 | int only_packfile, | |
806 | struct ref **sought, int nr_sought) | |
807 | { | |
808 | struct async demux; | |
809 | int do_keep = args->keep_pack; | |
810 | const char *cmd_name; | |
811 | struct pack_header header; | |
812 | int pass_header = 0; | |
813 | struct child_process cmd = CHILD_PROCESS_INIT; | |
814 | int ret; | |
815 | ||
816 | memset(&demux, 0, sizeof(demux)); | |
817 | if (use_sideband) { | |
818 | /* xd[] is talking with upload-pack; subprocess reads from | |
819 | * xd[0], spits out band#2 to stderr, and feeds us band#1 | |
820 | * through demux->out. | |
821 | */ | |
822 | demux.proc = sideband_demux; | |
823 | demux.data = xd; | |
824 | demux.out = -1; | |
825 | demux.isolate_sigpipe = 1; | |
826 | if (start_async(&demux)) | |
827 | die(_("fetch-pack: unable to fork off sideband demultiplexer")); | |
828 | } | |
829 | else | |
830 | demux.out = xd[0]; | |
831 | ||
832 | if (!args->keep_pack && unpack_limit) { | |
833 | ||
834 | if (read_pack_header(demux.out, &header)) | |
835 | die(_("protocol error: bad pack header")); | |
836 | pass_header = 1; | |
837 | if (ntohl(header.hdr_entries) < unpack_limit) | |
838 | do_keep = 0; | |
839 | else | |
840 | do_keep = 1; | |
841 | } | |
842 | ||
843 | if (alternate_shallow_file) { | |
844 | strvec_push(&cmd.args, "--shallow-file"); | |
845 | strvec_push(&cmd.args, alternate_shallow_file); | |
846 | } | |
847 | ||
848 | if (do_keep || args->from_promisor) { | |
849 | if (pack_lockfiles) | |
850 | cmd.out = -1; | |
851 | cmd_name = "index-pack"; | |
852 | strvec_push(&cmd.args, cmd_name); | |
853 | strvec_push(&cmd.args, "--stdin"); | |
854 | if (!args->quiet && !args->no_progress) | |
855 | strvec_push(&cmd.args, "-v"); | |
856 | if (args->use_thin_pack) | |
857 | strvec_push(&cmd.args, "--fix-thin"); | |
858 | if (do_keep && (args->lock_pack || unpack_limit)) { | |
859 | char hostname[HOST_NAME_MAX + 1]; | |
860 | if (xgethostname(hostname, sizeof(hostname))) | |
861 | xsnprintf(hostname, sizeof(hostname), "localhost"); | |
862 | strvec_pushf(&cmd.args, | |
863 | "--keep=fetch-pack %"PRIuMAX " on %s", | |
864 | (uintmax_t)getpid(), hostname); | |
865 | } | |
866 | if (only_packfile && args->check_self_contained_and_connected) | |
867 | strvec_push(&cmd.args, "--check-self-contained-and-connected"); | |
868 | else | |
869 | /* | |
870 | * We cannot perform any connectivity checks because | |
871 | * not all packs have been downloaded; let the caller | |
872 | * have this responsibility. | |
873 | */ | |
874 | args->check_self_contained_and_connected = 0; | |
875 | ||
876 | if (args->from_promisor) | |
877 | /* | |
878 | * write_promisor_file() may be called afterwards but | |
879 | * we still need index-pack to know that this is a | |
880 | * promisor pack. For example, if transfer.fsckobjects | |
881 | * is true, index-pack needs to know that .gitmodules | |
882 | * is a promisor object (so that it won't complain if | |
883 | * it is missing). | |
884 | */ | |
885 | strvec_push(&cmd.args, "--promisor"); | |
886 | } | |
887 | else { | |
888 | cmd_name = "unpack-objects"; | |
889 | strvec_push(&cmd.args, cmd_name); | |
890 | if (args->quiet || args->no_progress) | |
891 | strvec_push(&cmd.args, "-q"); | |
892 | args->check_self_contained_and_connected = 0; | |
893 | } | |
894 | ||
895 | if (pass_header) | |
896 | strvec_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32, | |
897 | ntohl(header.hdr_version), | |
898 | ntohl(header.hdr_entries)); | |
899 | if (fetch_fsck_objects >= 0 | |
900 | ? fetch_fsck_objects | |
901 | : transfer_fsck_objects >= 0 | |
902 | ? transfer_fsck_objects | |
903 | : 0) { | |
904 | if (args->from_promisor || !only_packfile) | |
905 | /* | |
906 | * We cannot use --strict in index-pack because it | |
907 | * checks both broken objects and links, but we only | |
908 | * want to check for broken objects. | |
909 | */ | |
910 | strvec_push(&cmd.args, "--fsck-objects"); | |
911 | else | |
912 | strvec_pushf(&cmd.args, "--strict%s", | |
913 | fsck_msg_types.buf); | |
914 | } | |
915 | ||
916 | cmd.in = demux.out; | |
917 | cmd.git_cmd = 1; | |
918 | if (start_command(&cmd)) | |
919 | die(_("fetch-pack: unable to fork off %s"), cmd_name); | |
920 | if (do_keep && pack_lockfiles) { | |
921 | char *pack_lockfile = index_pack_lockfile(cmd.out); | |
922 | if (pack_lockfile) | |
923 | string_list_append_nodup(pack_lockfiles, pack_lockfile); | |
924 | close(cmd.out); | |
925 | } | |
926 | ||
927 | if (!use_sideband) | |
928 | /* Closed by start_command() */ | |
929 | xd[0] = -1; | |
930 | ||
931 | ret = finish_command(&cmd); | |
932 | if (!ret || (args->check_self_contained_and_connected && ret == 1)) | |
933 | args->self_contained_and_connected = | |
934 | args->check_self_contained_and_connected && | |
935 | ret == 0; | |
936 | else | |
937 | die(_("%s failed"), cmd_name); | |
938 | if (use_sideband && finish_async(&demux)) | |
939 | die(_("error in sideband demultiplexer")); | |
940 | ||
941 | /* | |
942 | * Now that index-pack has succeeded, write the promisor file using the | |
943 | * obtained .keep filename if necessary | |
944 | */ | |
945 | if (do_keep && pack_lockfiles && pack_lockfiles->nr && args->from_promisor) | |
946 | write_promisor_file(pack_lockfiles->items[0].string, sought, nr_sought); | |
947 | ||
948 | return 0; | |
949 | } | |
950 | ||
951 | static int cmp_ref_by_name(const void *a_, const void *b_) | |
952 | { | |
953 | const struct ref *a = *((const struct ref **)a_); | |
954 | const struct ref *b = *((const struct ref **)b_); | |
955 | return strcmp(a->name, b->name); | |
956 | } | |
957 | ||
958 | static struct ref *do_fetch_pack(struct fetch_pack_args *args, | |
959 | int fd[2], | |
960 | const struct ref *orig_ref, | |
961 | struct ref **sought, int nr_sought, | |
962 | struct shallow_info *si, | |
963 | struct string_list *pack_lockfiles) | |
964 | { | |
965 | struct repository *r = the_repository; | |
966 | struct ref *ref = copy_ref_list(orig_ref); | |
967 | struct object_id oid; | |
968 | const char *agent_feature; | |
969 | int agent_len; | |
970 | struct fetch_negotiator negotiator_alloc; | |
971 | struct fetch_negotiator *negotiator; | |
972 | ||
973 | negotiator = &negotiator_alloc; | |
974 | fetch_negotiator_init(r, negotiator); | |
975 | ||
976 | sort_ref_list(&ref, ref_compare_name); | |
977 | QSORT(sought, nr_sought, cmp_ref_by_name); | |
978 | ||
979 | if ((agent_feature = server_feature_value("agent", &agent_len))) { | |
980 | agent_supported = 1; | |
981 | if (agent_len) | |
982 | print_verbose(args, _("Server version is %.*s"), | |
983 | agent_len, agent_feature); | |
984 | } | |
985 | ||
986 | if (!server_supports("session-id")) | |
987 | advertise_sid = 0; | |
988 | ||
989 | if (server_supports("shallow")) | |
990 | print_verbose(args, _("Server supports %s"), "shallow"); | |
991 | else if (args->depth > 0 || is_repository_shallow(r)) | |
992 | die(_("Server does not support shallow clients")); | |
993 | if (args->depth > 0 || args->deepen_since || args->deepen_not) | |
994 | args->deepen = 1; | |
995 | if (server_supports("multi_ack_detailed")) { | |
996 | print_verbose(args, _("Server supports %s"), "multi_ack_detailed"); | |
997 | multi_ack = 2; | |
998 | if (server_supports("no-done")) { | |
999 | print_verbose(args, _("Server supports %s"), "no-done"); | |
1000 | if (args->stateless_rpc) | |
1001 | no_done = 1; | |
1002 | } | |
1003 | } | |
1004 | else if (server_supports("multi_ack")) { | |
1005 | print_verbose(args, _("Server supports %s"), "multi_ack"); | |
1006 | multi_ack = 1; | |
1007 | } | |
1008 | if (server_supports("side-band-64k")) { | |
1009 | print_verbose(args, _("Server supports %s"), "side-band-64k"); | |
1010 | use_sideband = 2; | |
1011 | } | |
1012 | else if (server_supports("side-band")) { | |
1013 | print_verbose(args, _("Server supports %s"), "side-band"); | |
1014 | use_sideband = 1; | |
1015 | } | |
1016 | if (server_supports("allow-tip-sha1-in-want")) { | |
1017 | print_verbose(args, _("Server supports %s"), "allow-tip-sha1-in-want"); | |
1018 | allow_unadvertised_object_request |= ALLOW_TIP_SHA1; | |
1019 | } | |
1020 | if (server_supports("allow-reachable-sha1-in-want")) { | |
1021 | print_verbose(args, _("Server supports %s"), "allow-reachable-sha1-in-want"); | |
1022 | allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; | |
1023 | } | |
1024 | if (server_supports("thin-pack")) | |
1025 | print_verbose(args, _("Server supports %s"), "thin-pack"); | |
1026 | else | |
1027 | args->use_thin_pack = 0; | |
1028 | if (server_supports("no-progress")) | |
1029 | print_verbose(args, _("Server supports %s"), "no-progress"); | |
1030 | else | |
1031 | args->no_progress = 0; | |
1032 | if (server_supports("include-tag")) | |
1033 | print_verbose(args, _("Server supports %s"), "include-tag"); | |
1034 | else | |
1035 | args->include_tag = 0; | |
1036 | if (server_supports("ofs-delta")) | |
1037 | print_verbose(args, _("Server supports %s"), "ofs-delta"); | |
1038 | else | |
1039 | prefer_ofs_delta = 0; | |
1040 | ||
1041 | if (server_supports("filter")) { | |
1042 | server_supports_filtering = 1; | |
1043 | print_verbose(args, _("Server supports %s"), "filter"); | |
1044 | } else if (args->filter_options.choice) { | |
1045 | warning("filtering not recognized by server, ignoring"); | |
1046 | } | |
1047 | ||
1048 | if (server_supports("deepen-since")) { | |
1049 | print_verbose(args, _("Server supports %s"), "deepen-since"); | |
1050 | deepen_since_ok = 1; | |
1051 | } else if (args->deepen_since) | |
1052 | die(_("Server does not support --shallow-since")); | |
1053 | if (server_supports("deepen-not")) { | |
1054 | print_verbose(args, _("Server supports %s"), "deepen-not"); | |
1055 | deepen_not_ok = 1; | |
1056 | } else if (args->deepen_not) | |
1057 | die(_("Server does not support --shallow-exclude")); | |
1058 | if (server_supports("deepen-relative")) | |
1059 | print_verbose(args, _("Server supports %s"), "deepen-relative"); | |
1060 | else if (args->deepen_relative) | |
1061 | die(_("Server does not support --deepen")); | |
1062 | if (!server_supports_hash(the_hash_algo->name, NULL)) | |
1063 | die(_("Server does not support this repository's object format")); | |
1064 | ||
1065 | mark_complete_and_common_ref(negotiator, args, &ref); | |
1066 | filter_refs(args, &ref, sought, nr_sought); | |
1067 | if (everything_local(args, &ref)) { | |
1068 | packet_flush(fd[1]); | |
1069 | goto all_done; | |
1070 | } | |
1071 | if (find_common(negotiator, args, fd, &oid, ref) < 0) | |
1072 | if (!args->keep_pack) | |
1073 | /* When cloning, it is not unusual to have | |
1074 | * no common commit. | |
1075 | */ | |
1076 | warning(_("no common commits")); | |
1077 | ||
1078 | if (args->stateless_rpc) | |
1079 | packet_flush(fd[1]); | |
1080 | if (args->deepen) | |
1081 | setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, | |
1082 | NULL); | |
1083 | else if (si->nr_ours || si->nr_theirs) | |
1084 | alternate_shallow_file = setup_temporary_shallow(si->shallow); | |
1085 | else | |
1086 | alternate_shallow_file = NULL; | |
1087 | if (get_pack(args, fd, pack_lockfiles, 1, sought, nr_sought)) | |
1088 | die(_("git fetch-pack: fetch failed.")); | |
1089 | ||
1090 | all_done: | |
1091 | if (negotiator) | |
1092 | negotiator->release(negotiator); | |
1093 | return ref; | |
1094 | } | |
1095 | ||
1096 | static void add_shallow_requests(struct strbuf *req_buf, | |
1097 | const struct fetch_pack_args *args) | |
1098 | { | |
1099 | if (is_repository_shallow(the_repository)) | |
1100 | write_shallow_commits(req_buf, 1, NULL); | |
1101 | if (args->depth > 0) | |
1102 | packet_buf_write(req_buf, "deepen %d", args->depth); | |
1103 | if (args->deepen_since) { | |
1104 | timestamp_t max_age = approxidate(args->deepen_since); | |
1105 | packet_buf_write(req_buf, "deepen-since %"PRItime, max_age); | |
1106 | } | |
1107 | if (args->deepen_not) { | |
1108 | int i; | |
1109 | for (i = 0; i < args->deepen_not->nr; i++) { | |
1110 | struct string_list_item *s = args->deepen_not->items + i; | |
1111 | packet_buf_write(req_buf, "deepen-not %s", s->string); | |
1112 | } | |
1113 | } | |
1114 | if (args->deepen_relative) | |
1115 | packet_buf_write(req_buf, "deepen-relative\n"); | |
1116 | } | |
1117 | ||
1118 | static void add_wants(const struct ref *wants, struct strbuf *req_buf) | |
1119 | { | |
1120 | int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0); | |
1121 | ||
1122 | for ( ; wants ; wants = wants->next) { | |
1123 | const struct object_id *remote = &wants->old_oid; | |
1124 | struct object *o; | |
1125 | ||
1126 | /* | |
1127 | * If that object is complete (i.e. it is an ancestor of a | |
1128 | * local ref), we tell them we have it but do not have to | |
1129 | * tell them about its ancestors, which they already know | |
1130 | * about. | |
1131 | * | |
1132 | * We use lookup_object here because we are only | |
1133 | * interested in the case we *know* the object is | |
1134 | * reachable and we have already scanned it. | |
1135 | */ | |
1136 | if (((o = lookup_object(the_repository, remote)) != NULL) && | |
1137 | (o->flags & COMPLETE)) { | |
1138 | continue; | |
1139 | } | |
1140 | ||
1141 | if (!use_ref_in_want || wants->exact_oid) | |
1142 | packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote)); | |
1143 | else | |
1144 | packet_buf_write(req_buf, "want-ref %s\n", wants->name); | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | static void add_common(struct strbuf *req_buf, struct oidset *common) | |
1149 | { | |
1150 | struct oidset_iter iter; | |
1151 | const struct object_id *oid; | |
1152 | oidset_iter_init(common, &iter); | |
1153 | ||
1154 | while ((oid = oidset_iter_next(&iter))) { | |
1155 | packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); | |
1156 | } | |
1157 | } | |
1158 | ||
1159 | static int add_haves(struct fetch_negotiator *negotiator, | |
1160 | int seen_ack, | |
1161 | struct strbuf *req_buf, | |
1162 | int *haves_to_send, int *in_vain) | |
1163 | { | |
1164 | int ret = 0; | |
1165 | int haves_added = 0; | |
1166 | const struct object_id *oid; | |
1167 | ||
1168 | while ((oid = negotiator->next(negotiator))) { | |
1169 | packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); | |
1170 | if (++haves_added >= *haves_to_send) | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | *in_vain += haves_added; | |
1175 | if (!haves_added || (seen_ack && *in_vain >= MAX_IN_VAIN)) { | |
1176 | /* Send Done */ | |
1177 | packet_buf_write(req_buf, "done\n"); | |
1178 | ret = 1; | |
1179 | } | |
1180 | ||
1181 | /* Increase haves to send on next round */ | |
1182 | *haves_to_send = next_flush(1, *haves_to_send); | |
1183 | ||
1184 | return ret; | |
1185 | } | |
1186 | ||
1187 | static int send_fetch_request(struct fetch_negotiator *negotiator, int fd_out, | |
1188 | struct fetch_pack_args *args, | |
1189 | const struct ref *wants, struct oidset *common, | |
1190 | int *haves_to_send, int *in_vain, | |
1191 | int sideband_all, int seen_ack) | |
1192 | { | |
1193 | int ret = 0; | |
1194 | const char *hash_name; | |
1195 | struct strbuf req_buf = STRBUF_INIT; | |
1196 | ||
1197 | if (server_supports_v2("fetch", 1)) | |
1198 | packet_buf_write(&req_buf, "command=fetch"); | |
1199 | if (server_supports_v2("agent", 0)) | |
1200 | packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized()); | |
1201 | if (advertise_sid && server_supports_v2("session-id", 0)) | |
1202 | packet_buf_write(&req_buf, "session-id=%s", trace2_session_id()); | |
1203 | if (args->server_options && args->server_options->nr && | |
1204 | server_supports_v2("server-option", 1)) { | |
1205 | int i; | |
1206 | for (i = 0; i < args->server_options->nr; i++) | |
1207 | packet_buf_write(&req_buf, "server-option=%s", | |
1208 | args->server_options->items[i].string); | |
1209 | } | |
1210 | ||
1211 | if (server_feature_v2("object-format", &hash_name)) { | |
1212 | int hash_algo = hash_algo_by_name(hash_name); | |
1213 | if (hash_algo_by_ptr(the_hash_algo) != hash_algo) | |
1214 | die(_("mismatched algorithms: client %s; server %s"), | |
1215 | the_hash_algo->name, hash_name); | |
1216 | packet_write_fmt(fd_out, "object-format=%s", the_hash_algo->name); | |
1217 | } else if (hash_algo_by_ptr(the_hash_algo) != GIT_HASH_SHA1) { | |
1218 | die(_("the server does not support algorithm '%s'"), | |
1219 | the_hash_algo->name); | |
1220 | } | |
1221 | ||
1222 | packet_buf_delim(&req_buf); | |
1223 | if (args->use_thin_pack) | |
1224 | packet_buf_write(&req_buf, "thin-pack"); | |
1225 | if (args->no_progress) | |
1226 | packet_buf_write(&req_buf, "no-progress"); | |
1227 | if (args->include_tag) | |
1228 | packet_buf_write(&req_buf, "include-tag"); | |
1229 | if (prefer_ofs_delta) | |
1230 | packet_buf_write(&req_buf, "ofs-delta"); | |
1231 | if (sideband_all) | |
1232 | packet_buf_write(&req_buf, "sideband-all"); | |
1233 | ||
1234 | /* Add shallow-info and deepen request */ | |
1235 | if (server_supports_feature("fetch", "shallow", 0)) | |
1236 | add_shallow_requests(&req_buf, args); | |
1237 | else if (is_repository_shallow(the_repository) || args->deepen) | |
1238 | die(_("Server does not support shallow requests")); | |
1239 | ||
1240 | /* Add filter */ | |
1241 | if (server_supports_feature("fetch", "filter", 0) && | |
1242 | args->filter_options.choice) { | |
1243 | const char *spec = | |
1244 | expand_list_objects_filter_spec(&args->filter_options); | |
1245 | print_verbose(args, _("Server supports filter")); | |
1246 | packet_buf_write(&req_buf, "filter %s", spec); | |
1247 | } else if (args->filter_options.choice) { | |
1248 | warning("filtering not recognized by server, ignoring"); | |
1249 | } | |
1250 | ||
1251 | if (server_supports_feature("fetch", "packfile-uris", 0)) { | |
1252 | int i; | |
1253 | struct strbuf to_send = STRBUF_INIT; | |
1254 | ||
1255 | for (i = 0; i < uri_protocols.nr; i++) { | |
1256 | const char *s = uri_protocols.items[i].string; | |
1257 | ||
1258 | if (!strcmp(s, "https") || !strcmp(s, "http")) { | |
1259 | if (to_send.len) | |
1260 | strbuf_addch(&to_send, ','); | |
1261 | strbuf_addstr(&to_send, s); | |
1262 | } | |
1263 | } | |
1264 | if (to_send.len) { | |
1265 | packet_buf_write(&req_buf, "packfile-uris %s", | |
1266 | to_send.buf); | |
1267 | strbuf_release(&to_send); | |
1268 | } | |
1269 | } | |
1270 | ||
1271 | /* add wants */ | |
1272 | add_wants(wants, &req_buf); | |
1273 | ||
1274 | /* Add all of the common commits we've found in previous rounds */ | |
1275 | add_common(&req_buf, common); | |
1276 | ||
1277 | /* Add initial haves */ | |
1278 | ret = add_haves(negotiator, seen_ack, &req_buf, | |
1279 | haves_to_send, in_vain); | |
1280 | ||
1281 | /* Send request */ | |
1282 | packet_buf_flush(&req_buf); | |
1283 | if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0) | |
1284 | die_errno(_("unable to write request to remote")); | |
1285 | ||
1286 | strbuf_release(&req_buf); | |
1287 | return ret; | |
1288 | } | |
1289 | ||
1290 | /* | |
1291 | * Processes a section header in a server's response and checks if it matches | |
1292 | * `section`. If the value of `peek` is 1, the header line will be peeked (and | |
1293 | * not consumed); if 0, the line will be consumed and the function will die if | |
1294 | * the section header doesn't match what was expected. | |
1295 | */ | |
1296 | static int process_section_header(struct packet_reader *reader, | |
1297 | const char *section, int peek) | |
1298 | { | |
1299 | int ret; | |
1300 | ||
1301 | if (packet_reader_peek(reader) != PACKET_READ_NORMAL) | |
1302 | die(_("error reading section header '%s'"), section); | |
1303 | ||
1304 | ret = !strcmp(reader->line, section); | |
1305 | ||
1306 | if (!peek) { | |
1307 | if (!ret) | |
1308 | die(_("expected '%s', received '%s'"), | |
1309 | section, reader->line); | |
1310 | packet_reader_read(reader); | |
1311 | } | |
1312 | ||
1313 | return ret; | |
1314 | } | |
1315 | ||
1316 | enum common_found { | |
1317 | /* | |
1318 | * No commit was found to be possessed by both the client and the | |
1319 | * server, and "ready" was not received. | |
1320 | */ | |
1321 | NO_COMMON_FOUND, | |
1322 | ||
1323 | /* | |
1324 | * At least one commit was found to be possessed by both the client and | |
1325 | * the server, and "ready" was not received. | |
1326 | */ | |
1327 | COMMON_FOUND, | |
1328 | ||
1329 | /* | |
1330 | * "ready" was received, indicating that the server is ready to send | |
1331 | * the packfile without any further negotiation. | |
1332 | */ | |
1333 | READY | |
1334 | }; | |
1335 | ||
1336 | static enum common_found process_acks(struct fetch_negotiator *negotiator, | |
1337 | struct packet_reader *reader, | |
1338 | struct oidset *common) | |
1339 | { | |
1340 | /* received */ | |
1341 | int received_ready = 0; | |
1342 | int received_ack = 0; | |
1343 | ||
1344 | process_section_header(reader, "acknowledgments", 0); | |
1345 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
1346 | const char *arg; | |
1347 | ||
1348 | if (!strcmp(reader->line, "NAK")) | |
1349 | continue; | |
1350 | ||
1351 | if (skip_prefix(reader->line, "ACK ", &arg)) { | |
1352 | struct object_id oid; | |
1353 | received_ack = 1; | |
1354 | if (!get_oid_hex(arg, &oid)) { | |
1355 | struct commit *commit; | |
1356 | oidset_insert(common, &oid); | |
1357 | commit = lookup_commit(the_repository, &oid); | |
1358 | if (negotiator) | |
1359 | negotiator->ack(negotiator, commit); | |
1360 | } | |
1361 | continue; | |
1362 | } | |
1363 | ||
1364 | if (!strcmp(reader->line, "ready")) { | |
1365 | received_ready = 1; | |
1366 | continue; | |
1367 | } | |
1368 | ||
1369 | die(_("unexpected acknowledgment line: '%s'"), reader->line); | |
1370 | } | |
1371 | ||
1372 | if (reader->status != PACKET_READ_FLUSH && | |
1373 | reader->status != PACKET_READ_DELIM) | |
1374 | die(_("error processing acks: %d"), reader->status); | |
1375 | ||
1376 | /* | |
1377 | * If an "acknowledgments" section is sent, a packfile is sent if and | |
1378 | * only if "ready" was sent in this section. The other sections | |
1379 | * ("shallow-info" and "wanted-refs") are sent only if a packfile is | |
1380 | * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH | |
1381 | * otherwise. | |
1382 | */ | |
1383 | if (received_ready && reader->status != PACKET_READ_DELIM) | |
1384 | die(_("expected packfile to be sent after 'ready'")); | |
1385 | if (!received_ready && reader->status != PACKET_READ_FLUSH) | |
1386 | die(_("expected no other sections to be sent after no 'ready'")); | |
1387 | ||
1388 | return received_ready ? READY : | |
1389 | (received_ack ? COMMON_FOUND : NO_COMMON_FOUND); | |
1390 | } | |
1391 | ||
1392 | static void receive_shallow_info(struct fetch_pack_args *args, | |
1393 | struct packet_reader *reader, | |
1394 | struct oid_array *shallows, | |
1395 | struct shallow_info *si) | |
1396 | { | |
1397 | int unshallow_received = 0; | |
1398 | ||
1399 | process_section_header(reader, "shallow-info", 0); | |
1400 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
1401 | const char *arg; | |
1402 | struct object_id oid; | |
1403 | ||
1404 | if (skip_prefix(reader->line, "shallow ", &arg)) { | |
1405 | if (get_oid_hex(arg, &oid)) | |
1406 | die(_("invalid shallow line: %s"), reader->line); | |
1407 | oid_array_append(shallows, &oid); | |
1408 | continue; | |
1409 | } | |
1410 | if (skip_prefix(reader->line, "unshallow ", &arg)) { | |
1411 | if (get_oid_hex(arg, &oid)) | |
1412 | die(_("invalid unshallow line: %s"), reader->line); | |
1413 | if (!lookup_object(the_repository, &oid)) | |
1414 | die(_("object not found: %s"), reader->line); | |
1415 | /* make sure that it is parsed as shallow */ | |
1416 | if (!parse_object(the_repository, &oid)) | |
1417 | die(_("error in object: %s"), reader->line); | |
1418 | if (unregister_shallow(&oid)) | |
1419 | die(_("no shallow found: %s"), reader->line); | |
1420 | unshallow_received = 1; | |
1421 | continue; | |
1422 | } | |
1423 | die(_("expected shallow/unshallow, got %s"), reader->line); | |
1424 | } | |
1425 | ||
1426 | if (reader->status != PACKET_READ_FLUSH && | |
1427 | reader->status != PACKET_READ_DELIM) | |
1428 | die(_("error processing shallow info: %d"), reader->status); | |
1429 | ||
1430 | if (args->deepen || unshallow_received) { | |
1431 | /* | |
1432 | * Treat these as shallow lines caused by our depth settings. | |
1433 | * In v0, these lines cannot cause refs to be rejected; do the | |
1434 | * same. | |
1435 | */ | |
1436 | int i; | |
1437 | ||
1438 | for (i = 0; i < shallows->nr; i++) | |
1439 | register_shallow(the_repository, &shallows->oid[i]); | |
1440 | setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, | |
1441 | NULL); | |
1442 | args->deepen = 1; | |
1443 | } else if (shallows->nr) { | |
1444 | /* | |
1445 | * Treat these as shallow lines caused by the remote being | |
1446 | * shallow. In v0, remote refs that reach these objects are | |
1447 | * rejected (unless --update-shallow is set); do the same. | |
1448 | */ | |
1449 | prepare_shallow_info(si, shallows); | |
1450 | if (si->nr_ours || si->nr_theirs) | |
1451 | alternate_shallow_file = | |
1452 | setup_temporary_shallow(si->shallow); | |
1453 | else | |
1454 | alternate_shallow_file = NULL; | |
1455 | } else { | |
1456 | alternate_shallow_file = NULL; | |
1457 | } | |
1458 | } | |
1459 | ||
1460 | static int cmp_name_ref(const void *name, const void *ref) | |
1461 | { | |
1462 | return strcmp(name, (*(struct ref **)ref)->name); | |
1463 | } | |
1464 | ||
1465 | static void receive_wanted_refs(struct packet_reader *reader, | |
1466 | struct ref **sought, int nr_sought) | |
1467 | { | |
1468 | process_section_header(reader, "wanted-refs", 0); | |
1469 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
1470 | struct object_id oid; | |
1471 | const char *end; | |
1472 | struct ref **found; | |
1473 | ||
1474 | if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ') | |
1475 | die(_("expected wanted-ref, got '%s'"), reader->line); | |
1476 | ||
1477 | found = bsearch(end, sought, nr_sought, sizeof(*sought), | |
1478 | cmp_name_ref); | |
1479 | if (!found) | |
1480 | die(_("unexpected wanted-ref: '%s'"), reader->line); | |
1481 | oidcpy(&(*found)->old_oid, &oid); | |
1482 | } | |
1483 | ||
1484 | if (reader->status != PACKET_READ_DELIM) | |
1485 | die(_("error processing wanted refs: %d"), reader->status); | |
1486 | } | |
1487 | ||
1488 | static void receive_packfile_uris(struct packet_reader *reader, | |
1489 | struct string_list *uris) | |
1490 | { | |
1491 | process_section_header(reader, "packfile-uris", 0); | |
1492 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
1493 | if (reader->pktlen < the_hash_algo->hexsz || | |
1494 | reader->line[the_hash_algo->hexsz] != ' ') | |
1495 | die("expected '<hash> <uri>', got: %s\n", reader->line); | |
1496 | ||
1497 | string_list_append(uris, reader->line); | |
1498 | } | |
1499 | if (reader->status != PACKET_READ_DELIM) | |
1500 | die("expected DELIM"); | |
1501 | } | |
1502 | ||
1503 | enum fetch_state { | |
1504 | FETCH_CHECK_LOCAL = 0, | |
1505 | FETCH_SEND_REQUEST, | |
1506 | FETCH_PROCESS_ACKS, | |
1507 | FETCH_GET_PACK, | |
1508 | FETCH_DONE, | |
1509 | }; | |
1510 | ||
1511 | static void do_check_stateless_delimiter(const struct fetch_pack_args *args, | |
1512 | struct packet_reader *reader) | |
1513 | { | |
1514 | check_stateless_delimiter(args->stateless_rpc, reader, | |
1515 | _("git fetch-pack: expected response end packet")); | |
1516 | } | |
1517 | ||
1518 | static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, | |
1519 | int fd[2], | |
1520 | const struct ref *orig_ref, | |
1521 | struct ref **sought, int nr_sought, | |
1522 | struct oid_array *shallows, | |
1523 | struct shallow_info *si, | |
1524 | struct string_list *pack_lockfiles) | |
1525 | { | |
1526 | struct repository *r = the_repository; | |
1527 | struct ref *ref = copy_ref_list(orig_ref); | |
1528 | enum fetch_state state = FETCH_CHECK_LOCAL; | |
1529 | struct oidset common = OIDSET_INIT; | |
1530 | struct packet_reader reader; | |
1531 | int in_vain = 0, negotiation_started = 0; | |
1532 | int haves_to_send = INITIAL_FLUSH; | |
1533 | struct fetch_negotiator negotiator_alloc; | |
1534 | struct fetch_negotiator *negotiator; | |
1535 | int seen_ack = 0; | |
1536 | struct string_list packfile_uris = STRING_LIST_INIT_DUP; | |
1537 | int i; | |
1538 | ||
1539 | negotiator = &negotiator_alloc; | |
1540 | fetch_negotiator_init(r, negotiator); | |
1541 | ||
1542 | packet_reader_init(&reader, fd[0], NULL, 0, | |
1543 | PACKET_READ_CHOMP_NEWLINE | | |
1544 | PACKET_READ_DIE_ON_ERR_PACKET); | |
1545 | if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) && | |
1546 | server_supports_feature("fetch", "sideband-all", 0)) { | |
1547 | reader.use_sideband = 1; | |
1548 | reader.me = "fetch-pack"; | |
1549 | } | |
1550 | ||
1551 | while (state != FETCH_DONE) { | |
1552 | switch (state) { | |
1553 | case FETCH_CHECK_LOCAL: | |
1554 | sort_ref_list(&ref, ref_compare_name); | |
1555 | QSORT(sought, nr_sought, cmp_ref_by_name); | |
1556 | ||
1557 | /* v2 supports these by default */ | |
1558 | allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; | |
1559 | use_sideband = 2; | |
1560 | if (args->depth > 0 || args->deepen_since || args->deepen_not) | |
1561 | args->deepen = 1; | |
1562 | ||
1563 | /* Filter 'ref' by 'sought' and those that aren't local */ | |
1564 | mark_complete_and_common_ref(negotiator, args, &ref); | |
1565 | filter_refs(args, &ref, sought, nr_sought); | |
1566 | if (everything_local(args, &ref)) | |
1567 | state = FETCH_DONE; | |
1568 | else | |
1569 | state = FETCH_SEND_REQUEST; | |
1570 | ||
1571 | mark_tips(negotiator, args->negotiation_tips); | |
1572 | for_each_cached_alternate(negotiator, | |
1573 | insert_one_alternate_object); | |
1574 | break; | |
1575 | case FETCH_SEND_REQUEST: | |
1576 | if (!negotiation_started) { | |
1577 | negotiation_started = 1; | |
1578 | trace2_region_enter("fetch-pack", | |
1579 | "negotiation_v2", | |
1580 | the_repository); | |
1581 | } | |
1582 | if (send_fetch_request(negotiator, fd[1], args, ref, | |
1583 | &common, | |
1584 | &haves_to_send, &in_vain, | |
1585 | reader.use_sideband, | |
1586 | seen_ack)) | |
1587 | state = FETCH_GET_PACK; | |
1588 | else | |
1589 | state = FETCH_PROCESS_ACKS; | |
1590 | break; | |
1591 | case FETCH_PROCESS_ACKS: | |
1592 | /* Process ACKs/NAKs */ | |
1593 | switch (process_acks(negotiator, &reader, &common)) { | |
1594 | case READY: | |
1595 | /* | |
1596 | * Don't check for response delimiter; get_pack() will | |
1597 | * read the rest of this response. | |
1598 | */ | |
1599 | state = FETCH_GET_PACK; | |
1600 | break; | |
1601 | case COMMON_FOUND: | |
1602 | in_vain = 0; | |
1603 | seen_ack = 1; | |
1604 | /* fallthrough */ | |
1605 | case NO_COMMON_FOUND: | |
1606 | do_check_stateless_delimiter(args, &reader); | |
1607 | state = FETCH_SEND_REQUEST; | |
1608 | break; | |
1609 | } | |
1610 | break; | |
1611 | case FETCH_GET_PACK: | |
1612 | trace2_region_leave("fetch-pack", | |
1613 | "negotiation_v2", | |
1614 | the_repository); | |
1615 | /* Check for shallow-info section */ | |
1616 | if (process_section_header(&reader, "shallow-info", 1)) | |
1617 | receive_shallow_info(args, &reader, shallows, si); | |
1618 | ||
1619 | if (process_section_header(&reader, "wanted-refs", 1)) | |
1620 | receive_wanted_refs(&reader, sought, nr_sought); | |
1621 | ||
1622 | /* get the pack(s) */ | |
1623 | if (process_section_header(&reader, "packfile-uris", 1)) | |
1624 | receive_packfile_uris(&reader, &packfile_uris); | |
1625 | process_section_header(&reader, "packfile", 0); | |
1626 | if (get_pack(args, fd, pack_lockfiles, | |
1627 | !packfile_uris.nr, sought, nr_sought)) | |
1628 | die(_("git fetch-pack: fetch failed.")); | |
1629 | do_check_stateless_delimiter(args, &reader); | |
1630 | ||
1631 | state = FETCH_DONE; | |
1632 | break; | |
1633 | case FETCH_DONE: | |
1634 | continue; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | for (i = 0; i < packfile_uris.nr; i++) { | |
1639 | struct child_process cmd = CHILD_PROCESS_INIT; | |
1640 | char packname[GIT_MAX_HEXSZ + 1]; | |
1641 | const char *uri = packfile_uris.items[i].string + | |
1642 | the_hash_algo->hexsz + 1; | |
1643 | ||
1644 | strvec_push(&cmd.args, "http-fetch"); | |
1645 | strvec_pushf(&cmd.args, "--packfile=%.*s", | |
1646 | (int) the_hash_algo->hexsz, | |
1647 | packfile_uris.items[i].string); | |
1648 | strvec_push(&cmd.args, uri); | |
1649 | cmd.git_cmd = 1; | |
1650 | cmd.no_stdin = 1; | |
1651 | cmd.out = -1; | |
1652 | if (start_command(&cmd)) | |
1653 | die("fetch-pack: unable to spawn http-fetch"); | |
1654 | ||
1655 | if (read_in_full(cmd.out, packname, 5) < 0 || | |
1656 | memcmp(packname, "keep\t", 5)) | |
1657 | die("fetch-pack: expected keep then TAB at start of http-fetch output"); | |
1658 | ||
1659 | if (read_in_full(cmd.out, packname, | |
1660 | the_hash_algo->hexsz + 1) < 0 || | |
1661 | packname[the_hash_algo->hexsz] != '\n') | |
1662 | die("fetch-pack: expected hash then LF at end of http-fetch output"); | |
1663 | ||
1664 | packname[the_hash_algo->hexsz] = '\0'; | |
1665 | ||
1666 | close(cmd.out); | |
1667 | ||
1668 | if (finish_command(&cmd)) | |
1669 | die("fetch-pack: unable to finish http-fetch"); | |
1670 | ||
1671 | if (memcmp(packfile_uris.items[i].string, packname, | |
1672 | the_hash_algo->hexsz)) | |
1673 | die("fetch-pack: pack downloaded from %s does not match expected hash %.*s", | |
1674 | uri, (int) the_hash_algo->hexsz, | |
1675 | packfile_uris.items[i].string); | |
1676 | ||
1677 | string_list_append_nodup(pack_lockfiles, | |
1678 | xstrfmt("%s/pack/pack-%s.keep", | |
1679 | get_object_directory(), | |
1680 | packname)); | |
1681 | } | |
1682 | string_list_clear(&packfile_uris, 0); | |
1683 | ||
1684 | if (negotiator) | |
1685 | negotiator->release(negotiator); | |
1686 | ||
1687 | oidset_clear(&common); | |
1688 | return ref; | |
1689 | } | |
1690 | ||
1691 | static int fetch_pack_config_cb(const char *var, const char *value, void *cb) | |
1692 | { | |
1693 | if (strcmp(var, "fetch.fsck.skiplist") == 0) { | |
1694 | const char *path; | |
1695 | ||
1696 | if (git_config_pathname(&path, var, value)) | |
1697 | return 1; | |
1698 | strbuf_addf(&fsck_msg_types, "%cskiplist=%s", | |
1699 | fsck_msg_types.len ? ',' : '=', path); | |
1700 | free((char *)path); | |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | if (skip_prefix(var, "fetch.fsck.", &var)) { | |
1705 | if (is_valid_msg_type(var, value)) | |
1706 | strbuf_addf(&fsck_msg_types, "%c%s=%s", | |
1707 | fsck_msg_types.len ? ',' : '=', var, value); | |
1708 | else | |
1709 | warning("Skipping unknown msg id '%s'", var); | |
1710 | return 0; | |
1711 | } | |
1712 | ||
1713 | return git_default_config(var, value, cb); | |
1714 | } | |
1715 | ||
1716 | static void fetch_pack_config(void) | |
1717 | { | |
1718 | git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit); | |
1719 | git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit); | |
1720 | git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta); | |
1721 | git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects); | |
1722 | git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects); | |
1723 | git_config_get_bool("transfer.advertisesid", &advertise_sid); | |
1724 | if (!uri_protocols.nr) { | |
1725 | char *str; | |
1726 | ||
1727 | if (!git_config_get_string("fetch.uriprotocols", &str) && str) { | |
1728 | string_list_split(&uri_protocols, str, ',', -1); | |
1729 | free(str); | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | git_config(fetch_pack_config_cb, NULL); | |
1734 | } | |
1735 | ||
1736 | static void fetch_pack_setup(void) | |
1737 | { | |
1738 | static int did_setup; | |
1739 | if (did_setup) | |
1740 | return; | |
1741 | fetch_pack_config(); | |
1742 | if (0 <= transfer_unpack_limit) | |
1743 | unpack_limit = transfer_unpack_limit; | |
1744 | else if (0 <= fetch_unpack_limit) | |
1745 | unpack_limit = fetch_unpack_limit; | |
1746 | did_setup = 1; | |
1747 | } | |
1748 | ||
1749 | static int remove_duplicates_in_refs(struct ref **ref, int nr) | |
1750 | { | |
1751 | struct string_list names = STRING_LIST_INIT_NODUP; | |
1752 | int src, dst; | |
1753 | ||
1754 | for (src = dst = 0; src < nr; src++) { | |
1755 | struct string_list_item *item; | |
1756 | item = string_list_insert(&names, ref[src]->name); | |
1757 | if (item->util) | |
1758 | continue; /* already have it */ | |
1759 | item->util = ref[src]; | |
1760 | if (src != dst) | |
1761 | ref[dst] = ref[src]; | |
1762 | dst++; | |
1763 | } | |
1764 | for (src = dst; src < nr; src++) | |
1765 | ref[src] = NULL; | |
1766 | string_list_clear(&names, 0); | |
1767 | return dst; | |
1768 | } | |
1769 | ||
1770 | static void update_shallow(struct fetch_pack_args *args, | |
1771 | struct ref **sought, int nr_sought, | |
1772 | struct shallow_info *si) | |
1773 | { | |
1774 | struct oid_array ref = OID_ARRAY_INIT; | |
1775 | int *status; | |
1776 | int i; | |
1777 | ||
1778 | if (args->deepen && alternate_shallow_file) { | |
1779 | if (*alternate_shallow_file == '\0') { /* --unshallow */ | |
1780 | unlink_or_warn(git_path_shallow(the_repository)); | |
1781 | rollback_shallow_file(the_repository, &shallow_lock); | |
1782 | } else | |
1783 | commit_shallow_file(the_repository, &shallow_lock); | |
1784 | alternate_shallow_file = NULL; | |
1785 | return; | |
1786 | } | |
1787 | ||
1788 | if (!si->shallow || !si->shallow->nr) | |
1789 | return; | |
1790 | ||
1791 | if (args->cloning) { | |
1792 | /* | |
1793 | * remote is shallow, but this is a clone, there are | |
1794 | * no objects in repo to worry about. Accept any | |
1795 | * shallow points that exist in the pack (iow in repo | |
1796 | * after get_pack() and reprepare_packed_git()) | |
1797 | */ | |
1798 | struct oid_array extra = OID_ARRAY_INIT; | |
1799 | struct object_id *oid = si->shallow->oid; | |
1800 | for (i = 0; i < si->shallow->nr; i++) | |
1801 | if (has_object_file(&oid[i])) | |
1802 | oid_array_append(&extra, &oid[i]); | |
1803 | if (extra.nr) { | |
1804 | setup_alternate_shallow(&shallow_lock, | |
1805 | &alternate_shallow_file, | |
1806 | &extra); | |
1807 | commit_shallow_file(the_repository, &shallow_lock); | |
1808 | alternate_shallow_file = NULL; | |
1809 | } | |
1810 | oid_array_clear(&extra); | |
1811 | return; | |
1812 | } | |
1813 | ||
1814 | if (!si->nr_ours && !si->nr_theirs) | |
1815 | return; | |
1816 | ||
1817 | remove_nonexistent_theirs_shallow(si); | |
1818 | if (!si->nr_ours && !si->nr_theirs) | |
1819 | return; | |
1820 | for (i = 0; i < nr_sought; i++) | |
1821 | oid_array_append(&ref, &sought[i]->old_oid); | |
1822 | si->ref = &ref; | |
1823 | ||
1824 | if (args->update_shallow) { | |
1825 | /* | |
1826 | * remote is also shallow, .git/shallow may be updated | |
1827 | * so all refs can be accepted. Make sure we only add | |
1828 | * shallow roots that are actually reachable from new | |
1829 | * refs. | |
1830 | */ | |
1831 | struct oid_array extra = OID_ARRAY_INIT; | |
1832 | struct object_id *oid = si->shallow->oid; | |
1833 | assign_shallow_commits_to_refs(si, NULL, NULL); | |
1834 | if (!si->nr_ours && !si->nr_theirs) { | |
1835 | oid_array_clear(&ref); | |
1836 | return; | |
1837 | } | |
1838 | for (i = 0; i < si->nr_ours; i++) | |
1839 | oid_array_append(&extra, &oid[si->ours[i]]); | |
1840 | for (i = 0; i < si->nr_theirs; i++) | |
1841 | oid_array_append(&extra, &oid[si->theirs[i]]); | |
1842 | setup_alternate_shallow(&shallow_lock, | |
1843 | &alternate_shallow_file, | |
1844 | &extra); | |
1845 | commit_shallow_file(the_repository, &shallow_lock); | |
1846 | oid_array_clear(&extra); | |
1847 | oid_array_clear(&ref); | |
1848 | alternate_shallow_file = NULL; | |
1849 | return; | |
1850 | } | |
1851 | ||
1852 | /* | |
1853 | * remote is also shallow, check what ref is safe to update | |
1854 | * without updating .git/shallow | |
1855 | */ | |
1856 | status = xcalloc(nr_sought, sizeof(*status)); | |
1857 | assign_shallow_commits_to_refs(si, NULL, status); | |
1858 | if (si->nr_ours || si->nr_theirs) { | |
1859 | for (i = 0; i < nr_sought; i++) | |
1860 | if (status[i]) | |
1861 | sought[i]->status = REF_STATUS_REJECT_SHALLOW; | |
1862 | } | |
1863 | free(status); | |
1864 | oid_array_clear(&ref); | |
1865 | } | |
1866 | ||
1867 | static int iterate_ref_map(void *cb_data, struct object_id *oid) | |
1868 | { | |
1869 | struct ref **rm = cb_data; | |
1870 | struct ref *ref = *rm; | |
1871 | ||
1872 | if (!ref) | |
1873 | return -1; /* end of the list */ | |
1874 | *rm = ref->next; | |
1875 | oidcpy(oid, &ref->old_oid); | |
1876 | return 0; | |
1877 | } | |
1878 | ||
1879 | struct ref *fetch_pack(struct fetch_pack_args *args, | |
1880 | int fd[], | |
1881 | const struct ref *ref, | |
1882 | struct ref **sought, int nr_sought, | |
1883 | struct oid_array *shallow, | |
1884 | struct string_list *pack_lockfiles, | |
1885 | enum protocol_version version) | |
1886 | { | |
1887 | struct ref *ref_cpy; | |
1888 | struct shallow_info si; | |
1889 | struct oid_array shallows_scratch = OID_ARRAY_INIT; | |
1890 | ||
1891 | fetch_pack_setup(); | |
1892 | if (nr_sought) | |
1893 | nr_sought = remove_duplicates_in_refs(sought, nr_sought); | |
1894 | ||
1895 | if (version != protocol_v2 && !ref) { | |
1896 | packet_flush(fd[1]); | |
1897 | die(_("no matching remote head")); | |
1898 | } | |
1899 | if (version == protocol_v2) { | |
1900 | if (shallow->nr) | |
1901 | BUG("Protocol V2 does not provide shallows at this point in the fetch"); | |
1902 | memset(&si, 0, sizeof(si)); | |
1903 | ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought, | |
1904 | &shallows_scratch, &si, | |
1905 | pack_lockfiles); | |
1906 | } else { | |
1907 | prepare_shallow_info(&si, shallow); | |
1908 | ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, | |
1909 | &si, pack_lockfiles); | |
1910 | } | |
1911 | reprepare_packed_git(the_repository); | |
1912 | ||
1913 | if (!args->cloning && args->deepen) { | |
1914 | struct check_connected_options opt = CHECK_CONNECTED_INIT; | |
1915 | struct ref *iterator = ref_cpy; | |
1916 | opt.shallow_file = alternate_shallow_file; | |
1917 | if (args->deepen) | |
1918 | opt.is_deepening_fetch = 1; | |
1919 | if (check_connected(iterate_ref_map, &iterator, &opt)) { | |
1920 | error(_("remote did not send all necessary objects")); | |
1921 | free_refs(ref_cpy); | |
1922 | ref_cpy = NULL; | |
1923 | rollback_shallow_file(the_repository, &shallow_lock); | |
1924 | goto cleanup; | |
1925 | } | |
1926 | args->connectivity_checked = 1; | |
1927 | } | |
1928 | ||
1929 | update_shallow(args, sought, nr_sought, &si); | |
1930 | cleanup: | |
1931 | clear_shallow_info(&si); | |
1932 | oid_array_clear(&shallows_scratch); | |
1933 | return ref_cpy; | |
1934 | } | |
1935 | ||
1936 | int report_unmatched_refs(struct ref **sought, int nr_sought) | |
1937 | { | |
1938 | int i, ret = 0; | |
1939 | ||
1940 | for (i = 0; i < nr_sought; i++) { | |
1941 | if (!sought[i]) | |
1942 | continue; | |
1943 | switch (sought[i]->match_status) { | |
1944 | case REF_MATCHED: | |
1945 | continue; | |
1946 | case REF_NOT_MATCHED: | |
1947 | error(_("no such remote ref %s"), sought[i]->name); | |
1948 | break; | |
1949 | case REF_UNADVERTISED_NOT_ALLOWED: | |
1950 | error(_("Server does not allow request for unadvertised object %s"), | |
1951 | sought[i]->name); | |
1952 | break; | |
1953 | } | |
1954 | ret = 1; | |
1955 | } | |
1956 | return ret; | |
1957 | } |