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ci: remove the pipe after "p4 -V" to catch errors
[alt-git.git] / builtin / fetch.c
bloba0fca93bb6a63e441e3921832f7c7d9a7bd3dd78
1 /*
2 * "git fetch"
3 */
4 #include "cache.h"
5 #include "config.h"
6 #include "repository.h"
7 #include "refs.h"
8 #include "refspec.h"
9 #include "object-store.h"
10 #include "oidset.h"
11 #include "commit.h"
12 #include "builtin.h"
13 #include "string-list.h"
14 #include "remote.h"
15 #include "transport.h"
16 #include "run-command.h"
17 #include "parse-options.h"
18 #include "sigchain.h"
19 #include "submodule-config.h"
20 #include "submodule.h"
21 #include "connected.h"
22 #include "strvec.h"
23 #include "utf8.h"
24 #include "packfile.h"
25 #include "list-objects-filter-options.h"
26 #include "commit-reach.h"
27 #include "branch.h"
28 #include "promisor-remote.h"
29 #include "commit-graph.h"
30 #include "shallow.h"
31 #include "worktree.h"
32
33 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
34
35 static const char * const builtin_fetch_usage[] = {
36 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
37 N_("git fetch [<options>] <group>"),
38 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
39 N_("git fetch --all [<options>]"),
40 NULL
41 };
42
43 enum {
44 TAGS_UNSET = 0,
45 TAGS_DEFAULT = 1,
46 TAGS_SET = 2
47 };
48
49 static int fetch_prune_config = -1; /* unspecified */
50 static int fetch_show_forced_updates = 1;
51 static uint64_t forced_updates_ms = 0;
52 static int prefetch = 0;
53 static int prune = -1; /* unspecified */
54 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
55
56 static int fetch_prune_tags_config = -1; /* unspecified */
57 static int prune_tags = -1; /* unspecified */
58 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
59
60 static int all, append, dry_run, force, keep, multiple, update_head_ok;
61 static int write_fetch_head = 1;
62 static int verbosity, deepen_relative, set_upstream, refetch;
63 static int progress = -1;
64 static int enable_auto_gc = 1;
65 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
66 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
67 static int fetch_parallel_config = 1;
68 static int atomic_fetch;
69 static enum transport_family family;
70 static const char *depth;
71 static const char *deepen_since;
72 static const char *upload_pack;
73 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
74 static struct strbuf default_rla = STRBUF_INIT;
75 static struct transport *gtransport;
76 static struct transport *gsecondary;
77 static const char *submodule_prefix = "";
78 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
79 static int recurse_submodules_cli = RECURSE_SUBMODULES_DEFAULT;
80 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
81 static int shown_url = 0;
82 static struct refspec refmap = REFSPEC_INIT_FETCH;
83 static struct list_objects_filter_options filter_options = LIST_OBJECTS_FILTER_INIT;
84 static struct string_list server_options = STRING_LIST_INIT_DUP;
85 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
86 static int fetch_write_commit_graph = -1;
87 static int stdin_refspecs = 0;
88 static int negotiate_only;
89
90 static int git_fetch_config(const char *k, const char *v, void *cb)
91 {
92 if (!strcmp(k, "fetch.prune")) {
93 fetch_prune_config = git_config_bool(k, v);
94 return 0;
95 }
96
97 if (!strcmp(k, "fetch.prunetags")) {
98 fetch_prune_tags_config = git_config_bool(k, v);
99 return 0;
100 }
101
102 if (!strcmp(k, "fetch.showforcedupdates")) {
103 fetch_show_forced_updates = git_config_bool(k, v);
104 return 0;
105 }
106
107 if (!strcmp(k, "submodule.recurse")) {
108 int r = git_config_bool(k, v) ?
109 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
110 recurse_submodules = r;
111 }
112
113 if (!strcmp(k, "submodule.fetchjobs")) {
114 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
115 return 0;
116 } else if (!strcmp(k, "fetch.recursesubmodules")) {
117 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
118 return 0;
119 }
120
121 if (!strcmp(k, "fetch.parallel")) {
122 fetch_parallel_config = git_config_int(k, v);
123 if (fetch_parallel_config < 0)
124 die(_("fetch.parallel cannot be negative"));
125 return 0;
126 }
127
128 return git_default_config(k, v, cb);
129 }
130
131 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
132 {
133 BUG_ON_OPT_NEG(unset);
134
135 /*
136 * "git fetch --refmap='' origin foo"
137 * can be used to tell the command not to store anywhere
138 */
139 refspec_append(&refmap, arg);
140
141 return 0;
142 }
143
144 static struct option builtin_fetch_options[] = {
145 OPT__VERBOSITY(&verbosity),
146 OPT_BOOL(0, "all", &all,
147 N_("fetch from all remotes")),
148 OPT_BOOL(0, "set-upstream", &set_upstream,
149 N_("set upstream for git pull/fetch")),
150 OPT_BOOL('a', "append", &append,
151 N_("append to .git/FETCH_HEAD instead of overwriting")),
152 OPT_BOOL(0, "atomic", &atomic_fetch,
153 N_("use atomic transaction to update references")),
154 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
155 N_("path to upload pack on remote end")),
156 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
157 OPT_BOOL('m', "multiple", &multiple,
158 N_("fetch from multiple remotes")),
159 OPT_SET_INT('t', "tags", &tags,
160 N_("fetch all tags and associated objects"), TAGS_SET),
161 OPT_SET_INT('n', NULL, &tags,
162 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
163 OPT_INTEGER('j', "jobs", &max_jobs,
164 N_("number of submodules fetched in parallel")),
165 OPT_BOOL(0, "prefetch", &prefetch,
166 N_("modify the refspec to place all refs within refs/prefetch/")),
167 OPT_BOOL('p', "prune", &prune,
168 N_("prune remote-tracking branches no longer on remote")),
169 OPT_BOOL('P', "prune-tags", &prune_tags,
170 N_("prune local tags no longer on remote and clobber changed tags")),
171 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules_cli, N_("on-demand"),
172 N_("control recursive fetching of submodules"),
173 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
174 OPT_BOOL(0, "dry-run", &dry_run,
175 N_("dry run")),
176 OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
177 N_("write fetched references to the FETCH_HEAD file")),
178 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
179 OPT_BOOL('u', "update-head-ok", &update_head_ok,
180 N_("allow updating of HEAD ref")),
181 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
182 OPT_STRING(0, "depth", &depth, N_("depth"),
183 N_("deepen history of shallow clone")),
184 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
185 N_("deepen history of shallow repository based on time")),
186 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
187 N_("deepen history of shallow clone, excluding rev")),
188 OPT_INTEGER(0, "deepen", &deepen_relative,
189 N_("deepen history of shallow clone")),
190 OPT_SET_INT_F(0, "unshallow", &unshallow,
191 N_("convert to a complete repository"),
192 1, PARSE_OPT_NONEG),
193 OPT_SET_INT_F(0, "refetch", &refetch,
194 N_("re-fetch without negotiating common commits"),
195 1, PARSE_OPT_NONEG),
196 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
197 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
198 OPT_CALLBACK_F(0, "recurse-submodules-default",
199 &recurse_submodules_default, N_("on-demand"),
200 N_("default for recursive fetching of submodules "
201 "(lower priority than config files)"),
202 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
203 OPT_BOOL(0, "update-shallow", &update_shallow,
204 N_("accept refs that update .git/shallow")),
205 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
206 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
207 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
208 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
209 TRANSPORT_FAMILY_IPV4),
210 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
211 TRANSPORT_FAMILY_IPV6),
212 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
213 N_("report that we have only objects reachable from this object")),
214 OPT_BOOL(0, "negotiate-only", &negotiate_only,
215 N_("do not fetch a packfile; instead, print ancestors of negotiation tips")),
216 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
217 OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
218 N_("run 'maintenance --auto' after fetching")),
219 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
220 N_("run 'maintenance --auto' after fetching")),
221 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
222 N_("check for forced-updates on all updated branches")),
223 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
224 N_("write the commit-graph after fetching")),
225 OPT_BOOL(0, "stdin", &stdin_refspecs,
226 N_("accept refspecs from stdin")),
227 OPT_END()
228 };
229
230 static void unlock_pack(unsigned int flags)
231 {
232 if (gtransport)
233 transport_unlock_pack(gtransport, flags);
234 if (gsecondary)
235 transport_unlock_pack(gsecondary, flags);
236 }
237
238 static void unlock_pack_atexit(void)
239 {
240 unlock_pack(0);
241 }
242
243 static void unlock_pack_on_signal(int signo)
244 {
245 unlock_pack(TRANSPORT_UNLOCK_PACK_IN_SIGNAL_HANDLER);
246 sigchain_pop(signo);
247 raise(signo);
248 }
249
250 static void add_merge_config(struct ref **head,
251 const struct ref *remote_refs,
252 struct branch *branch,
253 struct ref ***tail)
254 {
255 int i;
256
257 for (i = 0; i < branch->merge_nr; i++) {
258 struct ref *rm, **old_tail = *tail;
259 struct refspec_item refspec;
260
261 for (rm = *head; rm; rm = rm->next) {
262 if (branch_merge_matches(branch, i, rm->name)) {
263 rm->fetch_head_status = FETCH_HEAD_MERGE;
264 break;
265 }
266 }
267 if (rm)
268 continue;
269
270 /*
271 * Not fetched to a remote-tracking branch? We need to fetch
272 * it anyway to allow this branch's "branch.$name.merge"
273 * to be honored by 'git pull', but we do not have to
274 * fail if branch.$name.merge is misconfigured to point
275 * at a nonexisting branch. If we were indeed called by
276 * 'git pull', it will notice the misconfiguration because
277 * there is no entry in the resulting FETCH_HEAD marked
278 * for merging.
279 */
280 memset(&refspec, 0, sizeof(refspec));
281 refspec.src = branch->merge[i]->src;
282 get_fetch_map(remote_refs, &refspec, tail, 1);
283 for (rm = *old_tail; rm; rm = rm->next)
284 rm->fetch_head_status = FETCH_HEAD_MERGE;
285 }
286 }
287
288 static void create_fetch_oidset(struct ref **head, struct oidset *out)
289 {
290 struct ref *rm = *head;
291 while (rm) {
292 oidset_insert(out, &rm->old_oid);
293 rm = rm->next;
294 }
295 }
296
297 struct refname_hash_entry {
298 struct hashmap_entry ent;
299 struct object_id oid;
300 int ignore;
301 char refname[FLEX_ARRAY];
302 };
303
304 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data UNUSED,
305 const struct hashmap_entry *eptr,
306 const struct hashmap_entry *entry_or_key,
307 const void *keydata)
308 {
309 const struct refname_hash_entry *e1, *e2;
310
311 e1 = container_of(eptr, const struct refname_hash_entry, ent);
312 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
313 return strcmp(e1->refname, keydata ? keydata : e2->refname);
314 }
315
316 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
317 const char *refname,
318 const struct object_id *oid)
319 {
320 struct refname_hash_entry *ent;
321 size_t len = strlen(refname);
322
323 FLEX_ALLOC_MEM(ent, refname, refname, len);
324 hashmap_entry_init(&ent->ent, strhash(refname));
325 oidcpy(&ent->oid, oid);
326 hashmap_add(map, &ent->ent);
327 return ent;
328 }
329
330 static int add_one_refname(const char *refname,
331 const struct object_id *oid,
332 int flag UNUSED, void *cbdata)
333 {
334 struct hashmap *refname_map = cbdata;
335
336 (void) refname_hash_add(refname_map, refname, oid);
337 return 0;
338 }
339
340 static void refname_hash_init(struct hashmap *map)
341 {
342 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
343 }
344
345 static int refname_hash_exists(struct hashmap *map, const char *refname)
346 {
347 return !!hashmap_get_from_hash(map, strhash(refname), refname);
348 }
349
350 static void clear_item(struct refname_hash_entry *item)
351 {
352 item->ignore = 1;
353 }
354
355
356 static void add_already_queued_tags(const char *refname,
357 const struct object_id *old_oid,
358 const struct object_id *new_oid,
359 void *cb_data)
360 {
361 struct hashmap *queued_tags = cb_data;
362 if (starts_with(refname, "refs/tags/") && new_oid)
363 (void) refname_hash_add(queued_tags, refname, new_oid);
364 }
365
366 static void find_non_local_tags(const struct ref *refs,
367 struct ref_transaction *transaction,
368 struct ref **head,
369 struct ref ***tail)
370 {
371 struct hashmap existing_refs;
372 struct hashmap remote_refs;
373 struct oidset fetch_oids = OIDSET_INIT;
374 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
375 struct string_list_item *remote_ref_item;
376 const struct ref *ref;
377 struct refname_hash_entry *item = NULL;
378 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
379
380 refname_hash_init(&existing_refs);
381 refname_hash_init(&remote_refs);
382 create_fetch_oidset(head, &fetch_oids);
383
384 for_each_ref(add_one_refname, &existing_refs);
385
386 /*
387 * If we already have a transaction, then we need to filter out all
388 * tags which have already been queued up.
389 */
390 if (transaction)
391 ref_transaction_for_each_queued_update(transaction,
392 add_already_queued_tags,
393 &existing_refs);
394
395 for (ref = refs; ref; ref = ref->next) {
396 if (!starts_with(ref->name, "refs/tags/"))
397 continue;
398
399 /*
400 * The peeled ref always follows the matching base
401 * ref, so if we see a peeled ref that we don't want
402 * to fetch then we can mark the ref entry in the list
403 * as one to ignore by setting util to NULL.
404 */
405 if (ends_with(ref->name, "^{}")) {
406 if (item &&
407 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
408 !oidset_contains(&fetch_oids, &ref->old_oid) &&
409 !has_object_file_with_flags(&item->oid, quick_flags) &&
410 !oidset_contains(&fetch_oids, &item->oid))
411 clear_item(item);
412 item = NULL;
413 continue;
414 }
415
416 /*
417 * If item is non-NULL here, then we previously saw a
418 * ref not followed by a peeled reference, so we need
419 * to check if it is a lightweight tag that we want to
420 * fetch.
421 */
422 if (item &&
423 !has_object_file_with_flags(&item->oid, quick_flags) &&
424 !oidset_contains(&fetch_oids, &item->oid))
425 clear_item(item);
426
427 item = NULL;
428
429 /* skip duplicates and refs that we already have */
430 if (refname_hash_exists(&remote_refs, ref->name) ||
431 refname_hash_exists(&existing_refs, ref->name))
432 continue;
433
434 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
435 string_list_insert(&remote_refs_list, ref->name);
436 }
437 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
438
439 /*
440 * We may have a final lightweight tag that needs to be
441 * checked to see if it needs fetching.
442 */
443 if (item &&
444 !has_object_file_with_flags(&item->oid, quick_flags) &&
445 !oidset_contains(&fetch_oids, &item->oid))
446 clear_item(item);
447
448 /*
449 * For all the tags in the remote_refs_list,
450 * add them to the list of refs to be fetched
451 */
452 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
453 const char *refname = remote_ref_item->string;
454 struct ref *rm;
455 unsigned int hash = strhash(refname);
456
457 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
458 struct refname_hash_entry, ent);
459 if (!item)
460 BUG("unseen remote ref?");
461
462 /* Unless we have already decided to ignore this item... */
463 if (item->ignore)
464 continue;
465
466 rm = alloc_ref(item->refname);
467 rm->peer_ref = alloc_ref(item->refname);
468 oidcpy(&rm->old_oid, &item->oid);
469 **tail = rm;
470 *tail = &rm->next;
471 }
472 hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
473 string_list_clear(&remote_refs_list, 0);
474 oidset_clear(&fetch_oids);
475 }
476
477 static void filter_prefetch_refspec(struct refspec *rs)
478 {
479 int i;
480
481 if (!prefetch)
482 return;
483
484 for (i = 0; i < rs->nr; i++) {
485 struct strbuf new_dst = STRBUF_INIT;
486 char *old_dst;
487 const char *sub = NULL;
488
489 if (rs->items[i].negative)
490 continue;
491 if (!rs->items[i].dst ||
492 (rs->items[i].src &&
493 !strncmp(rs->items[i].src,
494 ref_namespace[NAMESPACE_TAGS].ref,
495 strlen(ref_namespace[NAMESPACE_TAGS].ref)))) {
496 int j;
497
498 free(rs->items[i].src);
499 free(rs->items[i].dst);
500
501 for (j = i + 1; j < rs->nr; j++) {
502 rs->items[j - 1] = rs->items[j];
503 rs->raw[j - 1] = rs->raw[j];
504 }
505 rs->nr--;
506 i--;
507 continue;
508 }
509
510 old_dst = rs->items[i].dst;
511 strbuf_addstr(&new_dst, ref_namespace[NAMESPACE_PREFETCH].ref);
512
513 /*
514 * If old_dst starts with "refs/", then place
515 * sub after that prefix. Otherwise, start at
516 * the beginning of the string.
517 */
518 if (!skip_prefix(old_dst, "refs/", &sub))
519 sub = old_dst;
520 strbuf_addstr(&new_dst, sub);
521
522 rs->items[i].dst = strbuf_detach(&new_dst, NULL);
523 rs->items[i].force = 1;
524
525 free(old_dst);
526 }
527 }
528
529 static struct ref *get_ref_map(struct remote *remote,
530 const struct ref *remote_refs,
531 struct refspec *rs,
532 int tags, int *autotags)
533 {
534 int i;
535 struct ref *rm;
536 struct ref *ref_map = NULL;
537 struct ref **tail = &ref_map;
538
539 /* opportunistically-updated references: */
540 struct ref *orefs = NULL, **oref_tail = &orefs;
541
542 struct hashmap existing_refs;
543 int existing_refs_populated = 0;
544
545 filter_prefetch_refspec(rs);
546 if (remote)
547 filter_prefetch_refspec(&remote->fetch);
548
549 if (rs->nr) {
550 struct refspec *fetch_refspec;
551
552 for (i = 0; i < rs->nr; i++) {
553 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
554 if (rs->items[i].dst && rs->items[i].dst[0])
555 *autotags = 1;
556 }
557 /* Merge everything on the command line (but not --tags) */
558 for (rm = ref_map; rm; rm = rm->next)
559 rm->fetch_head_status = FETCH_HEAD_MERGE;
560
561 /*
562 * For any refs that we happen to be fetching via
563 * command-line arguments, the destination ref might
564 * have been missing or have been different than the
565 * remote-tracking ref that would be derived from the
566 * configured refspec. In these cases, we want to
567 * take the opportunity to update their configured
568 * remote-tracking reference. However, we do not want
569 * to mention these entries in FETCH_HEAD at all, as
570 * they would simply be duplicates of existing
571 * entries, so we set them FETCH_HEAD_IGNORE below.
572 *
573 * We compute these entries now, based only on the
574 * refspecs specified on the command line. But we add
575 * them to the list following the refspecs resulting
576 * from the tags option so that one of the latter,
577 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
578 * by ref_remove_duplicates() in favor of one of these
579 * opportunistic entries with FETCH_HEAD_IGNORE.
580 */
581 if (refmap.nr)
582 fetch_refspec = &refmap;
583 else
584 fetch_refspec = &remote->fetch;
585
586 for (i = 0; i < fetch_refspec->nr; i++)
587 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
588 } else if (refmap.nr) {
589 die("--refmap option is only meaningful with command-line refspec(s)");
590 } else {
591 /* Use the defaults */
592 struct branch *branch = branch_get(NULL);
593 int has_merge = branch_has_merge_config(branch);
594 if (remote &&
595 (remote->fetch.nr ||
596 /* Note: has_merge implies non-NULL branch->remote_name */
597 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
598 for (i = 0; i < remote->fetch.nr; i++) {
599 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
600 if (remote->fetch.items[i].dst &&
601 remote->fetch.items[i].dst[0])
602 *autotags = 1;
603 if (!i && !has_merge && ref_map &&
604 !remote->fetch.items[0].pattern)
605 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
606 }
607 /*
608 * if the remote we're fetching from is the same
609 * as given in branch.<name>.remote, we add the
610 * ref given in branch.<name>.merge, too.
611 *
612 * Note: has_merge implies non-NULL branch->remote_name
613 */
614 if (has_merge &&
615 !strcmp(branch->remote_name, remote->name))
616 add_merge_config(&ref_map, remote_refs, branch, &tail);
617 } else if (!prefetch) {
618 ref_map = get_remote_ref(remote_refs, "HEAD");
619 if (!ref_map)
620 die(_("couldn't find remote ref HEAD"));
621 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
622 tail = &ref_map->next;
623 }
624 }
625
626 if (tags == TAGS_SET)
627 /* also fetch all tags */
628 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
629 else if (tags == TAGS_DEFAULT && *autotags)
630 find_non_local_tags(remote_refs, NULL, &ref_map, &tail);
631
632 /* Now append any refs to be updated opportunistically: */
633 *tail = orefs;
634 for (rm = orefs; rm; rm = rm->next) {
635 rm->fetch_head_status = FETCH_HEAD_IGNORE;
636 tail = &rm->next;
637 }
638
639 /*
640 * apply negative refspecs first, before we remove duplicates. This is
641 * necessary as negative refspecs might remove an otherwise conflicting
642 * duplicate.
643 */
644 if (rs->nr)
645 ref_map = apply_negative_refspecs(ref_map, rs);
646 else
647 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
648
649 ref_map = ref_remove_duplicates(ref_map);
650
651 for (rm = ref_map; rm; rm = rm->next) {
652 if (rm->peer_ref) {
653 const char *refname = rm->peer_ref->name;
654 struct refname_hash_entry *peer_item;
655 unsigned int hash = strhash(refname);
656
657 if (!existing_refs_populated) {
658 refname_hash_init(&existing_refs);
659 for_each_ref(add_one_refname, &existing_refs);
660 existing_refs_populated = 1;
661 }
662
663 peer_item = hashmap_get_entry_from_hash(&existing_refs,
664 hash, refname,
665 struct refname_hash_entry, ent);
666 if (peer_item) {
667 struct object_id *old_oid = &peer_item->oid;
668 oidcpy(&rm->peer_ref->old_oid, old_oid);
669 }
670 }
671 }
672 if (existing_refs_populated)
673 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
674
675 return ref_map;
676 }
677
678 #define STORE_REF_ERROR_OTHER 1
679 #define STORE_REF_ERROR_DF_CONFLICT 2
680
681 static int s_update_ref(const char *action,
682 struct ref *ref,
683 struct ref_transaction *transaction,
684 int check_old)
685 {
686 char *msg;
687 char *rla = getenv("GIT_REFLOG_ACTION");
688 struct ref_transaction *our_transaction = NULL;
689 struct strbuf err = STRBUF_INIT;
690 int ret;
691
692 if (dry_run)
693 return 0;
694 if (!rla)
695 rla = default_rla.buf;
696 msg = xstrfmt("%s: %s", rla, action);
697
698 /*
699 * If no transaction was passed to us, we manage the transaction
700 * ourselves. Otherwise, we trust the caller to handle the transaction
701 * lifecycle.
702 */
703 if (!transaction) {
704 transaction = our_transaction = ref_transaction_begin(&err);
705 if (!transaction) {
706 ret = STORE_REF_ERROR_OTHER;
707 goto out;
708 }
709 }
710
711 ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
712 check_old ? &ref->old_oid : NULL,
713 0, msg, &err);
714 if (ret) {
715 ret = STORE_REF_ERROR_OTHER;
716 goto out;
717 }
718
719 if (our_transaction) {
720 switch (ref_transaction_commit(our_transaction, &err)) {
721 case 0:
722 break;
723 case TRANSACTION_NAME_CONFLICT:
724 ret = STORE_REF_ERROR_DF_CONFLICT;
725 goto out;
726 default:
727 ret = STORE_REF_ERROR_OTHER;
728 goto out;
729 }
730 }
731
732 out:
733 ref_transaction_free(our_transaction);
734 if (ret)
735 error("%s", err.buf);
736 strbuf_release(&err);
737 free(msg);
738 return ret;
739 }
740
741 static int refcol_width = 10;
742 static int compact_format;
743
744 static void adjust_refcol_width(const struct ref *ref)
745 {
746 int max, rlen, llen, len;
747
748 /* uptodate lines are only shown on high verbosity level */
749 if (verbosity <= 0 && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
750 return;
751
752 max = term_columns();
753 rlen = utf8_strwidth(prettify_refname(ref->name));
754
755 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
756
757 /*
758 * rough estimation to see if the output line is too long and
759 * should not be counted (we can't do precise calculation
760 * anyway because we don't know if the error explanation part
761 * will be printed in update_local_ref)
762 */
763 if (compact_format) {
764 llen = 0;
765 max = max * 2 / 3;
766 }
767 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
768 if (len >= max)
769 return;
770
771 /*
772 * Not precise calculation for compact mode because '*' can
773 * appear on the left hand side of '->' and shrink the column
774 * back.
775 */
776 if (refcol_width < rlen)
777 refcol_width = rlen;
778 }
779
780 static void prepare_format_display(struct ref *ref_map)
781 {
782 struct ref *rm;
783 const char *format = "full";
784
785 if (verbosity < 0)
786 return;
787
788 git_config_get_string_tmp("fetch.output", &format);
789 if (!strcasecmp(format, "full"))
790 compact_format = 0;
791 else if (!strcasecmp(format, "compact"))
792 compact_format = 1;
793 else
794 die(_("invalid value for '%s': '%s'"),
795 "fetch.output", format);
796
797 for (rm = ref_map; rm; rm = rm->next) {
798 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
799 !rm->peer_ref ||
800 !strcmp(rm->name, "HEAD"))
801 continue;
802
803 adjust_refcol_width(rm);
804 }
805 }
806
807 static void print_remote_to_local(struct strbuf *display,
808 const char *remote, const char *local)
809 {
810 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
811 }
812
813 static int find_and_replace(struct strbuf *haystack,
814 const char *needle,
815 const char *placeholder)
816 {
817 const char *p = NULL;
818 int plen, nlen;
819
820 nlen = strlen(needle);
821 if (ends_with(haystack->buf, needle))
822 p = haystack->buf + haystack->len - nlen;
823 else
824 p = strstr(haystack->buf, needle);
825 if (!p)
826 return 0;
827
828 if (p > haystack->buf && p[-1] != '/')
829 return 0;
830
831 plen = strlen(p);
832 if (plen > nlen && p[nlen] != '/')
833 return 0;
834
835 strbuf_splice(haystack, p - haystack->buf, nlen,
836 placeholder, strlen(placeholder));
837 return 1;
838 }
839
840 static void print_compact(struct strbuf *display,
841 const char *remote, const char *local)
842 {
843 struct strbuf r = STRBUF_INIT;
844 struct strbuf l = STRBUF_INIT;
845
846 if (!strcmp(remote, local)) {
847 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
848 return;
849 }
850
851 strbuf_addstr(&r, remote);
852 strbuf_addstr(&l, local);
853
854 if (!find_and_replace(&r, local, "*"))
855 find_and_replace(&l, remote, "*");
856 print_remote_to_local(display, r.buf, l.buf);
857
858 strbuf_release(&r);
859 strbuf_release(&l);
860 }
861
862 static void format_display(struct strbuf *display, char code,
863 const char *summary, const char *error,
864 const char *remote, const char *local,
865 int summary_width)
866 {
867 int width;
868
869 if (verbosity < 0)
870 return;
871
872 width = (summary_width + strlen(summary) - gettext_width(summary));
873
874 strbuf_addf(display, "%c %-*s ", code, width, summary);
875 if (!compact_format)
876 print_remote_to_local(display, remote, local);
877 else
878 print_compact(display, remote, local);
879 if (error)
880 strbuf_addf(display, " (%s)", error);
881 }
882
883 static int update_local_ref(struct ref *ref,
884 struct ref_transaction *transaction,
885 const char *remote, const struct ref *remote_ref,
886 struct strbuf *display, int summary_width)
887 {
888 struct commit *current = NULL, *updated;
889 const char *pretty_ref = prettify_refname(ref->name);
890 int fast_forward = 0;
891
892 if (!repo_has_object_file(the_repository, &ref->new_oid))
893 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
894
895 if (oideq(&ref->old_oid, &ref->new_oid)) {
896 if (verbosity > 0)
897 format_display(display, '=', _("[up to date]"), NULL,
898 remote, pretty_ref, summary_width);
899 return 0;
900 }
901
902 if (!update_head_ok &&
903 !is_null_oid(&ref->old_oid) &&
904 branch_checked_out(ref->name)) {
905 /*
906 * If this is the head, and it's not okay to update
907 * the head, and the old value of the head isn't empty...
908 */
909 format_display(display, '!', _("[rejected]"),
910 _("can't fetch into checked-out branch"),
911 remote, pretty_ref, summary_width);
912 return 1;
913 }
914
915 if (!is_null_oid(&ref->old_oid) &&
916 starts_with(ref->name, "refs/tags/")) {
917 if (force || ref->force) {
918 int r;
919 r = s_update_ref("updating tag", ref, transaction, 0);
920 format_display(display, r ? '!' : 't', _("[tag update]"),
921 r ? _("unable to update local ref") : NULL,
922 remote, pretty_ref, summary_width);
923 return r;
924 } else {
925 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
926 remote, pretty_ref, summary_width);
927 return 1;
928 }
929 }
930
931 current = lookup_commit_reference_gently(the_repository,
932 &ref->old_oid, 1);
933 updated = lookup_commit_reference_gently(the_repository,
934 &ref->new_oid, 1);
935 if (!current || !updated) {
936 const char *msg;
937 const char *what;
938 int r;
939 /*
940 * Nicely describe the new ref we're fetching.
941 * Base this on the remote's ref name, as it's
942 * more likely to follow a standard layout.
943 */
944 const char *name = remote_ref ? remote_ref->name : "";
945 if (starts_with(name, "refs/tags/")) {
946 msg = "storing tag";
947 what = _("[new tag]");
948 } else if (starts_with(name, "refs/heads/")) {
949 msg = "storing head";
950 what = _("[new branch]");
951 } else {
952 msg = "storing ref";
953 what = _("[new ref]");
954 }
955
956 r = s_update_ref(msg, ref, transaction, 0);
957 format_display(display, r ? '!' : '*', what,
958 r ? _("unable to update local ref") : NULL,
959 remote, pretty_ref, summary_width);
960 return r;
961 }
962
963 if (fetch_show_forced_updates) {
964 uint64_t t_before = getnanotime();
965 fast_forward = in_merge_bases(current, updated);
966 forced_updates_ms += (getnanotime() - t_before) / 1000000;
967 } else {
968 fast_forward = 1;
969 }
970
971 if (fast_forward) {
972 struct strbuf quickref = STRBUF_INIT;
973 int r;
974
975 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
976 strbuf_addstr(&quickref, "..");
977 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
978 r = s_update_ref("fast-forward", ref, transaction, 1);
979 format_display(display, r ? '!' : ' ', quickref.buf,
980 r ? _("unable to update local ref") : NULL,
981 remote, pretty_ref, summary_width);
982 strbuf_release(&quickref);
983 return r;
984 } else if (force || ref->force) {
985 struct strbuf quickref = STRBUF_INIT;
986 int r;
987 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
988 strbuf_addstr(&quickref, "...");
989 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
990 r = s_update_ref("forced-update", ref, transaction, 1);
991 format_display(display, r ? '!' : '+', quickref.buf,
992 r ? _("unable to update local ref") : _("forced update"),
993 remote, pretty_ref, summary_width);
994 strbuf_release(&quickref);
995 return r;
996 } else {
997 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
998 remote, pretty_ref, summary_width);
999 return 1;
1000 }
1001 }
1002
1003 static const struct object_id *iterate_ref_map(void *cb_data)
1004 {
1005 struct ref **rm = cb_data;
1006 struct ref *ref = *rm;
1007
1008 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
1009 ref = ref->next;
1010 if (!ref)
1011 return NULL;
1012 *rm = ref->next;
1013 return &ref->old_oid;
1014 }
1015
1016 struct fetch_head {
1017 FILE *fp;
1018 struct strbuf buf;
1019 };
1020
1021 static int open_fetch_head(struct fetch_head *fetch_head)
1022 {
1023 const char *filename = git_path_fetch_head(the_repository);
1024
1025 if (write_fetch_head) {
1026 fetch_head->fp = fopen(filename, "a");
1027 if (!fetch_head->fp)
1028 return error_errno(_("cannot open '%s'"), filename);
1029 strbuf_init(&fetch_head->buf, 0);
1030 } else {
1031 fetch_head->fp = NULL;
1032 }
1033
1034 return 0;
1035 }
1036
1037 static void append_fetch_head(struct fetch_head *fetch_head,
1038 const struct object_id *old_oid,
1039 enum fetch_head_status fetch_head_status,
1040 const char *note,
1041 const char *url, size_t url_len)
1042 {
1043 char old_oid_hex[GIT_MAX_HEXSZ + 1];
1044 const char *merge_status_marker;
1045 size_t i;
1046
1047 if (!fetch_head->fp)
1048 return;
1049
1050 switch (fetch_head_status) {
1051 case FETCH_HEAD_NOT_FOR_MERGE:
1052 merge_status_marker = "not-for-merge";
1053 break;
1054 case FETCH_HEAD_MERGE:
1055 merge_status_marker = "";
1056 break;
1057 default:
1058 /* do not write anything to FETCH_HEAD */
1059 return;
1060 }
1061
1062 strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
1063 oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
1064 for (i = 0; i < url_len; ++i)
1065 if ('\n' == url[i])
1066 strbuf_addstr(&fetch_head->buf, "\\n");
1067 else
1068 strbuf_addch(&fetch_head->buf, url[i]);
1069 strbuf_addch(&fetch_head->buf, '\n');
1070
1071 /*
1072 * When using an atomic fetch, we do not want to update FETCH_HEAD if
1073 * any of the reference updates fails. We thus have to write all
1074 * updates to a buffer first and only commit it as soon as all
1075 * references have been successfully updated.
1076 */
1077 if (!atomic_fetch) {
1078 strbuf_write(&fetch_head->buf, fetch_head->fp);
1079 strbuf_reset(&fetch_head->buf);
1080 }
1081 }
1082
1083 static void commit_fetch_head(struct fetch_head *fetch_head)
1084 {
1085 if (!fetch_head->fp || !atomic_fetch)
1086 return;
1087 strbuf_write(&fetch_head->buf, fetch_head->fp);
1088 }
1089
1090 static void close_fetch_head(struct fetch_head *fetch_head)
1091 {
1092 if (!fetch_head->fp)
1093 return;
1094
1095 fclose(fetch_head->fp);
1096 strbuf_release(&fetch_head->buf);
1097 }
1098
1099 static const char warn_show_forced_updates[] =
1100 N_("fetch normally indicates which branches had a forced update,\n"
1101 "but that check has been disabled; to re-enable, use '--show-forced-updates'\n"
1102 "flag or run 'git config fetch.showForcedUpdates true'");
1103 static const char warn_time_show_forced_updates[] =
1104 N_("it took %.2f seconds to check forced updates; you can use\n"
1105 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
1106 "to avoid this check\n");
1107
1108 static int store_updated_refs(const char *raw_url, const char *remote_name,
1109 int connectivity_checked,
1110 struct ref_transaction *transaction, struct ref *ref_map,
1111 struct fetch_head *fetch_head)
1112 {
1113 int url_len, i, rc = 0;
1114 struct strbuf note = STRBUF_INIT;
1115 const char *what, *kind;
1116 struct ref *rm;
1117 char *url;
1118 int want_status;
1119 int summary_width = 0;
1120
1121 if (verbosity >= 0)
1122 summary_width = transport_summary_width(ref_map);
1123
1124 if (raw_url)
1125 url = transport_anonymize_url(raw_url);
1126 else
1127 url = xstrdup("foreign");
1128
1129 if (!connectivity_checked) {
1130 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1131
1132 rm = ref_map;
1133 if (check_connected(iterate_ref_map, &rm, &opt)) {
1134 rc = error(_("%s did not send all necessary objects\n"), url);
1135 goto abort;
1136 }
1137 }
1138
1139 prepare_format_display(ref_map);
1140
1141 /*
1142 * We do a pass for each fetch_head_status type in their enum order, so
1143 * merged entries are written before not-for-merge. That lets readers
1144 * use FETCH_HEAD as a refname to refer to the ref to be merged.
1145 */
1146 for (want_status = FETCH_HEAD_MERGE;
1147 want_status <= FETCH_HEAD_IGNORE;
1148 want_status++) {
1149 for (rm = ref_map; rm; rm = rm->next) {
1150 struct ref *ref = NULL;
1151
1152 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
1153 if (want_status == FETCH_HEAD_MERGE)
1154 warning(_("rejected %s because shallow roots are not allowed to be updated"),
1155 rm->peer_ref ? rm->peer_ref->name : rm->name);
1156 continue;
1157 }
1158
1159 /*
1160 * When writing FETCH_HEAD we need to determine whether
1161 * we already have the commit or not. If not, then the
1162 * reference is not for merge and needs to be written
1163 * to the reflog after other commits which we already
1164 * have. We're not interested in this property though
1165 * in case FETCH_HEAD is not to be updated, so we can
1166 * skip the classification in that case.
1167 */
1168 if (fetch_head->fp) {
1169 struct commit *commit = NULL;
1170
1171 /*
1172 * References in "refs/tags/" are often going to point
1173 * to annotated tags, which are not part of the
1174 * commit-graph. We thus only try to look up refs in
1175 * the graph which are not in that namespace to not
1176 * regress performance in repositories with many
1177 * annotated tags.
1178 */
1179 if (!starts_with(rm->name, "refs/tags/"))
1180 commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
1181 if (!commit) {
1182 commit = lookup_commit_reference_gently(the_repository,
1183 &rm->old_oid,
1184 1);
1185 if (!commit)
1186 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
1187 }
1188 }
1189
1190 if (rm->fetch_head_status != want_status)
1191 continue;
1192
1193 if (rm->peer_ref) {
1194 ref = alloc_ref(rm->peer_ref->name);
1195 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
1196 oidcpy(&ref->new_oid, &rm->old_oid);
1197 ref->force = rm->peer_ref->force;
1198 }
1199
1200 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
1201 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
1202 check_for_new_submodule_commits(&rm->old_oid);
1203 }
1204
1205 if (!strcmp(rm->name, "HEAD")) {
1206 kind = "";
1207 what = "";
1208 }
1209 else if (skip_prefix(rm->name, "refs/heads/", &what))
1210 kind = "branch";
1211 else if (skip_prefix(rm->name, "refs/tags/", &what))
1212 kind = "tag";
1213 else if (skip_prefix(rm->name, "refs/remotes/", &what))
1214 kind = "remote-tracking branch";
1215 else {
1216 kind = "";
1217 what = rm->name;
1218 }
1219
1220 url_len = strlen(url);
1221 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1222 ;
1223 url_len = i + 1;
1224 if (4 < i && !strncmp(".git", url + i - 3, 4))
1225 url_len = i - 3;
1226
1227 strbuf_reset(&note);
1228 if (*what) {
1229 if (*kind)
1230 strbuf_addf(&note, "%s ", kind);
1231 strbuf_addf(&note, "'%s' of ", what);
1232 }
1233
1234 append_fetch_head(fetch_head, &rm->old_oid,
1235 rm->fetch_head_status,
1236 note.buf, url, url_len);
1237
1238 strbuf_reset(&note);
1239 if (ref) {
1240 rc |= update_local_ref(ref, transaction, what,
1241 rm, &note, summary_width);
1242 free(ref);
1243 } else if (write_fetch_head || dry_run) {
1244 /*
1245 * Display fetches written to FETCH_HEAD (or
1246 * would be written to FETCH_HEAD, if --dry-run
1247 * is set).
1248 */
1249 format_display(&note, '*',
1250 *kind ? kind : "branch", NULL,
1251 *what ? what : "HEAD",
1252 "FETCH_HEAD", summary_width);
1253 }
1254 if (note.len) {
1255 if (!shown_url) {
1256 fprintf(stderr, _("From %.*s\n"),
1257 url_len, url);
1258 shown_url = 1;
1259 }
1260 fprintf(stderr, " %s\n", note.buf);
1261 }
1262 }
1263 }
1264
1265 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1266 error(_("some local refs could not be updated; try running\n"
1267 " 'git remote prune %s' to remove any old, conflicting "
1268 "branches"), remote_name);
1269
1270 if (advice_enabled(ADVICE_FETCH_SHOW_FORCED_UPDATES)) {
1271 if (!fetch_show_forced_updates) {
1272 warning(_(warn_show_forced_updates));
1273 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1274 warning(_(warn_time_show_forced_updates),
1275 forced_updates_ms / 1000.0);
1276 }
1277 }
1278
1279 abort:
1280 strbuf_release(&note);
1281 free(url);
1282 return rc;
1283 }
1284
1285 /*
1286 * We would want to bypass the object transfer altogether if
1287 * everything we are going to fetch already exists and is connected
1288 * locally.
1289 */
1290 static int check_exist_and_connected(struct ref *ref_map)
1291 {
1292 struct ref *rm = ref_map;
1293 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1294 struct ref *r;
1295
1296 /*
1297 * If we are deepening a shallow clone we already have these
1298 * objects reachable. Running rev-list here will return with
1299 * a good (0) exit status and we'll bypass the fetch that we
1300 * really need to perform. Claiming failure now will ensure
1301 * we perform the network exchange to deepen our history.
1302 */
1303 if (deepen)
1304 return -1;
1305
1306 /*
1307 * Similarly, if we need to refetch, we always want to perform a full
1308 * fetch ignoring existing objects.
1309 */
1310 if (refetch)
1311 return -1;
1312
1313
1314 /*
1315 * check_connected() allows objects to merely be promised, but
1316 * we need all direct targets to exist.
1317 */
1318 for (r = rm; r; r = r->next) {
1319 if (!has_object_file_with_flags(&r->old_oid,
1320 OBJECT_INFO_SKIP_FETCH_OBJECT))
1321 return -1;
1322 }
1323
1324 opt.quiet = 1;
1325 return check_connected(iterate_ref_map, &rm, &opt);
1326 }
1327
1328 static int fetch_and_consume_refs(struct transport *transport,
1329 struct ref_transaction *transaction,
1330 struct ref *ref_map,
1331 struct fetch_head *fetch_head)
1332 {
1333 int connectivity_checked = 1;
1334 int ret;
1335
1336 /*
1337 * We don't need to perform a fetch in case we can already satisfy all
1338 * refs.
1339 */
1340 ret = check_exist_and_connected(ref_map);
1341 if (ret) {
1342 trace2_region_enter("fetch", "fetch_refs", the_repository);
1343 ret = transport_fetch_refs(transport, ref_map);
1344 trace2_region_leave("fetch", "fetch_refs", the_repository);
1345 if (ret)
1346 goto out;
1347 connectivity_checked = transport->smart_options ?
1348 transport->smart_options->connectivity_checked : 0;
1349 }
1350
1351 trace2_region_enter("fetch", "consume_refs", the_repository);
1352 ret = store_updated_refs(transport->url, transport->remote->name,
1353 connectivity_checked, transaction, ref_map,
1354 fetch_head);
1355 trace2_region_leave("fetch", "consume_refs", the_repository);
1356
1357 out:
1358 transport_unlock_pack(transport, 0);
1359 return ret;
1360 }
1361
1362 static int prune_refs(struct refspec *rs,
1363 struct ref_transaction *transaction,
1364 struct ref *ref_map,
1365 const char *raw_url)
1366 {
1367 int url_len, i, result = 0;
1368 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1369 struct strbuf err = STRBUF_INIT;
1370 char *url;
1371 const char *dangling_msg = dry_run
1372 ? _(" (%s will become dangling)")
1373 : _(" (%s has become dangling)");
1374
1375 if (raw_url)
1376 url = transport_anonymize_url(raw_url);
1377 else
1378 url = xstrdup("foreign");
1379
1380 url_len = strlen(url);
1381 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1382 ;
1383
1384 url_len = i + 1;
1385 if (4 < i && !strncmp(".git", url + i - 3, 4))
1386 url_len = i - 3;
1387
1388 if (!dry_run) {
1389 if (transaction) {
1390 for (ref = stale_refs; ref; ref = ref->next) {
1391 result = ref_transaction_delete(transaction, ref->name, NULL, 0,
1392 "fetch: prune", &err);
1393 if (result)
1394 goto cleanup;
1395 }
1396 } else {
1397 struct string_list refnames = STRING_LIST_INIT_NODUP;
1398
1399 for (ref = stale_refs; ref; ref = ref->next)
1400 string_list_append(&refnames, ref->name);
1401
1402 result = delete_refs("fetch: prune", &refnames, 0);
1403 string_list_clear(&refnames, 0);
1404 }
1405 }
1406
1407 if (verbosity >= 0) {
1408 int summary_width = transport_summary_width(stale_refs);
1409
1410 for (ref = stale_refs; ref; ref = ref->next) {
1411 struct strbuf sb = STRBUF_INIT;
1412 if (!shown_url) {
1413 fprintf(stderr, _("From %.*s\n"), url_len, url);
1414 shown_url = 1;
1415 }
1416 format_display(&sb, '-', _("[deleted]"), NULL,
1417 _("(none)"), prettify_refname(ref->name),
1418 summary_width);
1419 fprintf(stderr, " %s\n",sb.buf);
1420 strbuf_release(&sb);
1421 warn_dangling_symref(stderr, dangling_msg, ref->name);
1422 }
1423 }
1424
1425 cleanup:
1426 strbuf_release(&err);
1427 free(url);
1428 free_refs(stale_refs);
1429 return result;
1430 }
1431
1432 static void check_not_current_branch(struct ref *ref_map)
1433 {
1434 const char *path;
1435 for (; ref_map; ref_map = ref_map->next)
1436 if (ref_map->peer_ref &&
1437 starts_with(ref_map->peer_ref->name, "refs/heads/") &&
1438 (path = branch_checked_out(ref_map->peer_ref->name)))
1439 die(_("refusing to fetch into branch '%s' "
1440 "checked out at '%s'"),
1441 ref_map->peer_ref->name, path);
1442 }
1443
1444 static int truncate_fetch_head(void)
1445 {
1446 const char *filename = git_path_fetch_head(the_repository);
1447 FILE *fp = fopen_for_writing(filename);
1448
1449 if (!fp)
1450 return error_errno(_("cannot open '%s'"), filename);
1451 fclose(fp);
1452 return 0;
1453 }
1454
1455 static void set_option(struct transport *transport, const char *name, const char *value)
1456 {
1457 int r = transport_set_option(transport, name, value);
1458 if (r < 0)
1459 die(_("option \"%s\" value \"%s\" is not valid for %s"),
1460 name, value, transport->url);
1461 if (r > 0)
1462 warning(_("option \"%s\" is ignored for %s\n"),
1463 name, transport->url);
1464 }
1465
1466
1467 static int add_oid(const char *refname UNUSED,
1468 const struct object_id *oid,
1469 int flags UNUSED, void *cb_data)
1470 {
1471 struct oid_array *oids = cb_data;
1472
1473 oid_array_append(oids, oid);
1474 return 0;
1475 }
1476
1477 static void add_negotiation_tips(struct git_transport_options *smart_options)
1478 {
1479 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1480 int i;
1481
1482 for (i = 0; i < negotiation_tip.nr; i++) {
1483 const char *s = negotiation_tip.items[i].string;
1484 int old_nr;
1485 if (!has_glob_specials(s)) {
1486 struct object_id oid;
1487 if (get_oid(s, &oid))
1488 die(_("%s is not a valid object"), s);
1489 if (!has_object(the_repository, &oid, 0))
1490 die(_("the object %s does not exist"), s);
1491 oid_array_append(oids, &oid);
1492 continue;
1493 }
1494 old_nr = oids->nr;
1495 for_each_glob_ref(add_oid, s, oids);
1496 if (old_nr == oids->nr)
1497 warning("ignoring --negotiation-tip=%s because it does not match any refs",
1498 s);
1499 }
1500 smart_options->negotiation_tips = oids;
1501 }
1502
1503 static struct transport *prepare_transport(struct remote *remote, int deepen)
1504 {
1505 struct transport *transport;
1506
1507 transport = transport_get(remote, NULL);
1508 transport_set_verbosity(transport, verbosity, progress);
1509 transport->family = family;
1510 if (upload_pack)
1511 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1512 if (keep)
1513 set_option(transport, TRANS_OPT_KEEP, "yes");
1514 if (depth)
1515 set_option(transport, TRANS_OPT_DEPTH, depth);
1516 if (deepen && deepen_since)
1517 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1518 if (deepen && deepen_not.nr)
1519 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1520 (const char *)&deepen_not);
1521 if (deepen_relative)
1522 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1523 if (update_shallow)
1524 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1525 if (refetch)
1526 set_option(transport, TRANS_OPT_REFETCH, "yes");
1527 if (filter_options.choice) {
1528 const char *spec =
1529 expand_list_objects_filter_spec(&filter_options);
1530 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1531 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1532 }
1533 if (negotiation_tip.nr) {
1534 if (transport->smart_options)
1535 add_negotiation_tips(transport->smart_options);
1536 else
1537 warning("ignoring --negotiation-tip because the protocol does not support it");
1538 }
1539 return transport;
1540 }
1541
1542 static int backfill_tags(struct transport *transport,
1543 struct ref_transaction *transaction,
1544 struct ref *ref_map,
1545 struct fetch_head *fetch_head)
1546 {
1547 int retcode, cannot_reuse;
1548
1549 /*
1550 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1551 * when remote helper is used (setting it to an empty string
1552 * is not unsetting). We could extend the remote helper
1553 * protocol for that, but for now, just force a new connection
1554 * without deepen-since. Similar story for deepen-not.
1555 */
1556 cannot_reuse = transport->cannot_reuse ||
1557 deepen_since || deepen_not.nr;
1558 if (cannot_reuse) {
1559 gsecondary = prepare_transport(transport->remote, 0);
1560 transport = gsecondary;
1561 }
1562
1563 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1564 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1565 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1566 retcode = fetch_and_consume_refs(transport, transaction, ref_map, fetch_head);
1567
1568 if (gsecondary) {
1569 transport_disconnect(gsecondary);
1570 gsecondary = NULL;
1571 }
1572
1573 return retcode;
1574 }
1575
1576 static int do_fetch(struct transport *transport,
1577 struct refspec *rs)
1578 {
1579 struct ref_transaction *transaction = NULL;
1580 struct ref *ref_map = NULL;
1581 int autotags = (transport->remote->fetch_tags == 1);
1582 int retcode = 0;
1583 const struct ref *remote_refs;
1584 struct transport_ls_refs_options transport_ls_refs_options =
1585 TRANSPORT_LS_REFS_OPTIONS_INIT;
1586 int must_list_refs = 1;
1587 struct fetch_head fetch_head = { 0 };
1588 struct strbuf err = STRBUF_INIT;
1589
1590 if (tags == TAGS_DEFAULT) {
1591 if (transport->remote->fetch_tags == 2)
1592 tags = TAGS_SET;
1593 if (transport->remote->fetch_tags == -1)
1594 tags = TAGS_UNSET;
1595 }
1596
1597 /* if not appending, truncate FETCH_HEAD */
1598 if (!append && write_fetch_head) {
1599 retcode = truncate_fetch_head();
1600 if (retcode)
1601 goto cleanup;
1602 }
1603
1604 if (rs->nr) {
1605 int i;
1606
1607 refspec_ref_prefixes(rs, &transport_ls_refs_options.ref_prefixes);
1608
1609 /*
1610 * We can avoid listing refs if all of them are exact
1611 * OIDs
1612 */
1613 must_list_refs = 0;
1614 for (i = 0; i < rs->nr; i++) {
1615 if (!rs->items[i].exact_sha1) {
1616 must_list_refs = 1;
1617 break;
1618 }
1619 }
1620 } else {
1621 struct branch *branch = branch_get(NULL);
1622
1623 if (transport->remote->fetch.nr)
1624 refspec_ref_prefixes(&transport->remote->fetch,
1625 &transport_ls_refs_options.ref_prefixes);
1626 if (branch_has_merge_config(branch) &&
1627 !strcmp(branch->remote_name, transport->remote->name)) {
1628 int i;
1629 for (i = 0; i < branch->merge_nr; i++) {
1630 strvec_push(&transport_ls_refs_options.ref_prefixes,
1631 branch->merge[i]->src);
1632 }
1633 }
1634 }
1635
1636 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1637 must_list_refs = 1;
1638 if (transport_ls_refs_options.ref_prefixes.nr)
1639 strvec_push(&transport_ls_refs_options.ref_prefixes,
1640 "refs/tags/");
1641 }
1642
1643 if (must_list_refs) {
1644 trace2_region_enter("fetch", "remote_refs", the_repository);
1645 remote_refs = transport_get_remote_refs(transport,
1646 &transport_ls_refs_options);
1647 trace2_region_leave("fetch", "remote_refs", the_repository);
1648 } else
1649 remote_refs = NULL;
1650
1651 transport_ls_refs_options_release(&transport_ls_refs_options);
1652
1653 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1654 tags, &autotags);
1655 if (!update_head_ok)
1656 check_not_current_branch(ref_map);
1657
1658 retcode = open_fetch_head(&fetch_head);
1659 if (retcode)
1660 goto cleanup;
1661
1662 if (atomic_fetch) {
1663 transaction = ref_transaction_begin(&err);
1664 if (!transaction) {
1665 retcode = error("%s", err.buf);
1666 goto cleanup;
1667 }
1668 }
1669
1670 if (tags == TAGS_DEFAULT && autotags)
1671 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1672 if (prune) {
1673 /*
1674 * We only prune based on refspecs specified
1675 * explicitly (via command line or configuration); we
1676 * don't care whether --tags was specified.
1677 */
1678 if (rs->nr) {
1679 retcode = prune_refs(rs, transaction, ref_map, transport->url);
1680 } else {
1681 retcode = prune_refs(&transport->remote->fetch,
1682 transaction, ref_map,
1683 transport->url);
1684 }
1685 if (retcode != 0)
1686 retcode = 1;
1687 }
1688
1689 if (fetch_and_consume_refs(transport, transaction, ref_map, &fetch_head)) {
1690 retcode = 1;
1691 goto cleanup;
1692 }
1693
1694 /*
1695 * If neither --no-tags nor --tags was specified, do automated tag
1696 * following.
1697 */
1698 if (tags == TAGS_DEFAULT && autotags) {
1699 struct ref *tags_ref_map = NULL, **tail = &tags_ref_map;
1700
1701 find_non_local_tags(remote_refs, transaction, &tags_ref_map, &tail);
1702 if (tags_ref_map) {
1703 /*
1704 * If backfilling of tags fails then we want to tell
1705 * the user so, but we have to continue regardless to
1706 * populate upstream information of the references we
1707 * have already fetched above. The exception though is
1708 * when `--atomic` is passed: in that case we'll abort
1709 * the transaction and don't commit anything.
1710 */
1711 if (backfill_tags(transport, transaction, tags_ref_map,
1712 &fetch_head))
1713 retcode = 1;
1714 }
1715
1716 free_refs(tags_ref_map);
1717 }
1718
1719 if (transaction) {
1720 if (retcode)
1721 goto cleanup;
1722
1723 retcode = ref_transaction_commit(transaction, &err);
1724 if (retcode) {
1725 error("%s", err.buf);
1726 ref_transaction_free(transaction);
1727 transaction = NULL;
1728 goto cleanup;
1729 }
1730 }
1731
1732 commit_fetch_head(&fetch_head);
1733
1734 if (set_upstream) {
1735 struct branch *branch = branch_get("HEAD");
1736 struct ref *rm;
1737 struct ref *source_ref = NULL;
1738
1739 /*
1740 * We're setting the upstream configuration for the
1741 * current branch. The relevant upstream is the
1742 * fetched branch that is meant to be merged with the
1743 * current one, i.e. the one fetched to FETCH_HEAD.
1744 *
1745 * When there are several such branches, consider the
1746 * request ambiguous and err on the safe side by doing
1747 * nothing and just emit a warning.
1748 */
1749 for (rm = ref_map; rm; rm = rm->next) {
1750 if (!rm->peer_ref) {
1751 if (source_ref) {
1752 warning(_("multiple branches detected, incompatible with --set-upstream"));
1753 goto cleanup;
1754 } else {
1755 source_ref = rm;
1756 }
1757 }
1758 }
1759 if (source_ref) {
1760 if (!branch) {
1761 const char *shortname = source_ref->name;
1762 skip_prefix(shortname, "refs/heads/", &shortname);
1763
1764 warning(_("could not set upstream of HEAD to '%s' from '%s' when "
1765 "it does not point to any branch."),
1766 shortname, transport->remote->name);
1767 goto cleanup;
1768 }
1769
1770 if (!strcmp(source_ref->name, "HEAD") ||
1771 starts_with(source_ref->name, "refs/heads/"))
1772 install_branch_config(0,
1773 branch->name,
1774 transport->remote->name,
1775 source_ref->name);
1776 else if (starts_with(source_ref->name, "refs/remotes/"))
1777 warning(_("not setting upstream for a remote remote-tracking branch"));
1778 else if (starts_with(source_ref->name, "refs/tags/"))
1779 warning(_("not setting upstream for a remote tag"));
1780 else
1781 warning(_("unknown branch type"));
1782 } else {
1783 warning(_("no source branch found;\n"
1784 "you need to specify exactly one branch with the --set-upstream option"));
1785 }
1786 }
1787
1788 cleanup:
1789 if (retcode && transaction) {
1790 ref_transaction_abort(transaction, &err);
1791 error("%s", err.buf);
1792 }
1793
1794 close_fetch_head(&fetch_head);
1795 strbuf_release(&err);
1796 free_refs(ref_map);
1797 return retcode;
1798 }
1799
1800 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1801 {
1802 struct string_list *list = priv;
1803 if (!remote->skip_default_update)
1804 string_list_append(list, remote->name);
1805 return 0;
1806 }
1807
1808 struct remote_group_data {
1809 const char *name;
1810 struct string_list *list;
1811 };
1812
1813 static int get_remote_group(const char *key, const char *value, void *priv)
1814 {
1815 struct remote_group_data *g = priv;
1816
1817 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1818 /* split list by white space */
1819 while (*value) {
1820 size_t wordlen = strcspn(value, " \t\n");
1821
1822 if (wordlen >= 1)
1823 string_list_append_nodup(g->list,
1824 xstrndup(value, wordlen));
1825 value += wordlen + (value[wordlen] != '\0');
1826 }
1827 }
1828
1829 return 0;
1830 }
1831
1832 static int add_remote_or_group(const char *name, struct string_list *list)
1833 {
1834 int prev_nr = list->nr;
1835 struct remote_group_data g;
1836 g.name = name; g.list = list;
1837
1838 git_config(get_remote_group, &g);
1839 if (list->nr == prev_nr) {
1840 struct remote *remote = remote_get(name);
1841 if (!remote_is_configured(remote, 0))
1842 return 0;
1843 string_list_append(list, remote->name);
1844 }
1845 return 1;
1846 }
1847
1848 static void add_options_to_argv(struct strvec *argv)
1849 {
1850 if (dry_run)
1851 strvec_push(argv, "--dry-run");
1852 if (prune != -1)
1853 strvec_push(argv, prune ? "--prune" : "--no-prune");
1854 if (prune_tags != -1)
1855 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1856 if (update_head_ok)
1857 strvec_push(argv, "--update-head-ok");
1858 if (force)
1859 strvec_push(argv, "--force");
1860 if (keep)
1861 strvec_push(argv, "--keep");
1862 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1863 strvec_push(argv, "--recurse-submodules");
1864 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1865 strvec_push(argv, "--recurse-submodules=on-demand");
1866 if (tags == TAGS_SET)
1867 strvec_push(argv, "--tags");
1868 else if (tags == TAGS_UNSET)
1869 strvec_push(argv, "--no-tags");
1870 if (verbosity >= 2)
1871 strvec_push(argv, "-v");
1872 if (verbosity >= 1)
1873 strvec_push(argv, "-v");
1874 else if (verbosity < 0)
1875 strvec_push(argv, "-q");
1876 if (family == TRANSPORT_FAMILY_IPV4)
1877 strvec_push(argv, "--ipv4");
1878 else if (family == TRANSPORT_FAMILY_IPV6)
1879 strvec_push(argv, "--ipv6");
1880 }
1881
1882 /* Fetch multiple remotes in parallel */
1883
1884 struct parallel_fetch_state {
1885 const char **argv;
1886 struct string_list *remotes;
1887 int next, result;
1888 };
1889
1890 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1891 void *cb, void **task_cb)
1892 {
1893 struct parallel_fetch_state *state = cb;
1894 char *remote;
1895
1896 if (state->next < 0 || state->next >= state->remotes->nr)
1897 return 0;
1898
1899 remote = state->remotes->items[state->next++].string;
1900 *task_cb = remote;
1901
1902 strvec_pushv(&cp->args, state->argv);
1903 strvec_push(&cp->args, remote);
1904 cp->git_cmd = 1;
1905
1906 if (verbosity >= 0)
1907 printf(_("Fetching %s\n"), remote);
1908
1909 return 1;
1910 }
1911
1912 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1913 {
1914 struct parallel_fetch_state *state = cb;
1915 const char *remote = task_cb;
1916
1917 state->result = error(_("could not fetch %s"), remote);
1918
1919 return 0;
1920 }
1921
1922 static int fetch_finished(int result, struct strbuf *out,
1923 void *cb, void *task_cb)
1924 {
1925 struct parallel_fetch_state *state = cb;
1926 const char *remote = task_cb;
1927
1928 if (result) {
1929 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1930 remote, result);
1931 state->result = -1;
1932 }
1933
1934 return 0;
1935 }
1936
1937 static int fetch_multiple(struct string_list *list, int max_children)
1938 {
1939 int i, result = 0;
1940 struct strvec argv = STRVEC_INIT;
1941
1942 if (!append && write_fetch_head) {
1943 int errcode = truncate_fetch_head();
1944 if (errcode)
1945 return errcode;
1946 }
1947
1948 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1949 "--no-write-commit-graph", NULL);
1950 add_options_to_argv(&argv);
1951
1952 if (max_children != 1 && list->nr != 1) {
1953 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1954
1955 strvec_push(&argv, "--end-of-options");
1956 result = run_processes_parallel_tr2(max_children,
1957 &fetch_next_remote,
1958 &fetch_failed_to_start,
1959 &fetch_finished,
1960 &state,
1961 "fetch", "parallel/fetch");
1962
1963 if (!result)
1964 result = state.result;
1965 } else
1966 for (i = 0; i < list->nr; i++) {
1967 const char *name = list->items[i].string;
1968 strvec_push(&argv, name);
1969 if (verbosity >= 0)
1970 printf(_("Fetching %s\n"), name);
1971 if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1972 error(_("could not fetch %s"), name);
1973 result = 1;
1974 }
1975 strvec_pop(&argv);
1976 }
1977
1978 strvec_clear(&argv);
1979 return !!result;
1980 }
1981
1982 /*
1983 * Fetching from the promisor remote should use the given filter-spec
1984 * or inherit the default filter-spec from the config.
1985 */
1986 static inline void fetch_one_setup_partial(struct remote *remote)
1987 {
1988 /*
1989 * Explicit --no-filter argument overrides everything, regardless
1990 * of any prior partial clones and fetches.
1991 */
1992 if (filter_options.no_filter)
1993 return;
1994
1995 /*
1996 * If no prior partial clone/fetch and the current fetch DID NOT
1997 * request a partial-fetch, do a normal fetch.
1998 */
1999 if (!has_promisor_remote() && !filter_options.choice)
2000 return;
2001
2002 /*
2003 * If this is a partial-fetch request, we enable partial on
2004 * this repo if not already enabled and remember the given
2005 * filter-spec as the default for subsequent fetches to this
2006 * remote if there is currently no default filter-spec.
2007 */
2008 if (filter_options.choice) {
2009 partial_clone_register(remote->name, &filter_options);
2010 return;
2011 }
2012
2013 /*
2014 * Do a partial-fetch from the promisor remote using either the
2015 * explicitly given filter-spec or inherit the filter-spec from
2016 * the config.
2017 */
2018 if (!filter_options.choice)
2019 partial_clone_get_default_filter_spec(&filter_options, remote->name);
2020 return;
2021 }
2022
2023 static int fetch_one(struct remote *remote, int argc, const char **argv,
2024 int prune_tags_ok, int use_stdin_refspecs)
2025 {
2026 struct refspec rs = REFSPEC_INIT_FETCH;
2027 int i;
2028 int exit_code;
2029 int maybe_prune_tags;
2030 int remote_via_config = remote_is_configured(remote, 0);
2031
2032 if (!remote)
2033 die(_("no remote repository specified; please specify either a URL or a\n"
2034 "remote name from which new revisions should be fetched"));
2035
2036 gtransport = prepare_transport(remote, 1);
2037
2038 if (prune < 0) {
2039 /* no command line request */
2040 if (0 <= remote->prune)
2041 prune = remote->prune;
2042 else if (0 <= fetch_prune_config)
2043 prune = fetch_prune_config;
2044 else
2045 prune = PRUNE_BY_DEFAULT;
2046 }
2047
2048 if (prune_tags < 0) {
2049 /* no command line request */
2050 if (0 <= remote->prune_tags)
2051 prune_tags = remote->prune_tags;
2052 else if (0 <= fetch_prune_tags_config)
2053 prune_tags = fetch_prune_tags_config;
2054 else
2055 prune_tags = PRUNE_TAGS_BY_DEFAULT;
2056 }
2057
2058 maybe_prune_tags = prune_tags_ok && prune_tags;
2059 if (maybe_prune_tags && remote_via_config)
2060 refspec_append(&remote->fetch, TAG_REFSPEC);
2061
2062 if (maybe_prune_tags && (argc || !remote_via_config))
2063 refspec_append(&rs, TAG_REFSPEC);
2064
2065 for (i = 0; i < argc; i++) {
2066 if (!strcmp(argv[i], "tag")) {
2067 i++;
2068 if (i >= argc)
2069 die(_("you need to specify a tag name"));
2070
2071 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
2072 argv[i], argv[i]);
2073 } else {
2074 refspec_append(&rs, argv[i]);
2075 }
2076 }
2077
2078 if (use_stdin_refspecs) {
2079 struct strbuf line = STRBUF_INIT;
2080 while (strbuf_getline_lf(&line, stdin) != EOF)
2081 refspec_append(&rs, line.buf);
2082 strbuf_release(&line);
2083 }
2084
2085 if (server_options.nr)
2086 gtransport->server_options = &server_options;
2087
2088 sigchain_push_common(unlock_pack_on_signal);
2089 atexit(unlock_pack_atexit);
2090 sigchain_push(SIGPIPE, SIG_IGN);
2091 exit_code = do_fetch(gtransport, &rs);
2092 sigchain_pop(SIGPIPE);
2093 refspec_clear(&rs);
2094 transport_disconnect(gtransport);
2095 gtransport = NULL;
2096 return exit_code;
2097 }
2098
2099 int cmd_fetch(int argc, const char **argv, const char *prefix)
2100 {
2101 int i;
2102 struct string_list list = STRING_LIST_INIT_DUP;
2103 struct remote *remote = NULL;
2104 int result = 0;
2105 int prune_tags_ok = 1;
2106
2107 packet_trace_identity("fetch");
2108
2109 /* Record the command line for the reflog */
2110 strbuf_addstr(&default_rla, "fetch");
2111 for (i = 1; i < argc; i++) {
2112 /* This handles non-URLs gracefully */
2113 char *anon = transport_anonymize_url(argv[i]);
2114
2115 strbuf_addf(&default_rla, " %s", anon);
2116 free(anon);
2117 }
2118
2119 git_config(git_fetch_config, NULL);
2120 if (the_repository->gitdir) {
2121 prepare_repo_settings(the_repository);
2122 the_repository->settings.command_requires_full_index = 0;
2123 }
2124
2125 argc = parse_options(argc, argv, prefix,
2126 builtin_fetch_options, builtin_fetch_usage, 0);
2127
2128 if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT)
2129 recurse_submodules = recurse_submodules_cli;
2130
2131 if (negotiate_only) {
2132 switch (recurse_submodules_cli) {
2133 case RECURSE_SUBMODULES_OFF:
2134 case RECURSE_SUBMODULES_DEFAULT:
2135 /*
2136 * --negotiate-only should never recurse into
2137 * submodules. Skip it by setting recurse_submodules to
2138 * RECURSE_SUBMODULES_OFF.
2139 */
2140 recurse_submodules = RECURSE_SUBMODULES_OFF;
2141 break;
2142
2143 default:
2144 die(_("options '%s' and '%s' cannot be used together"),
2145 "--negotiate-only", "--recurse-submodules");
2146 }
2147 }
2148
2149 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
2150 int *sfjc = submodule_fetch_jobs_config == -1
2151 ? &submodule_fetch_jobs_config : NULL;
2152 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
2153 ? &recurse_submodules : NULL;
2154
2155 fetch_config_from_gitmodules(sfjc, rs);
2156 }
2157
2158 if (negotiate_only && !negotiation_tip.nr)
2159 die(_("--negotiate-only needs one or more --negotiation-tip=*"));
2160
2161 if (deepen_relative) {
2162 if (deepen_relative < 0)
2163 die(_("negative depth in --deepen is not supported"));
2164 if (depth)
2165 die(_("options '%s' and '%s' cannot be used together"), "--deepen", "--depth");
2166 depth = xstrfmt("%d", deepen_relative);
2167 }
2168 if (unshallow) {
2169 if (depth)
2170 die(_("options '%s' and '%s' cannot be used together"), "--depth", "--unshallow");
2171 else if (!is_repository_shallow(the_repository))
2172 die(_("--unshallow on a complete repository does not make sense"));
2173 else
2174 depth = xstrfmt("%d", INFINITE_DEPTH);
2175 }
2176
2177 /* no need to be strict, transport_set_option() will validate it again */
2178 if (depth && atoi(depth) < 1)
2179 die(_("depth %s is not a positive number"), depth);
2180 if (depth || deepen_since || deepen_not.nr)
2181 deepen = 1;
2182
2183 /* FETCH_HEAD never gets updated in --dry-run mode */
2184 if (dry_run)
2185 write_fetch_head = 0;
2186
2187 if (all) {
2188 if (argc == 1)
2189 die(_("fetch --all does not take a repository argument"));
2190 else if (argc > 1)
2191 die(_("fetch --all does not make sense with refspecs"));
2192 (void) for_each_remote(get_one_remote_for_fetch, &list);
2193
2194 /* do not do fetch_multiple() of one */
2195 if (list.nr == 1)
2196 remote = remote_get(list.items[0].string);
2197 } else if (argc == 0) {
2198 /* No arguments -- use default remote */
2199 remote = remote_get(NULL);
2200 } else if (multiple) {
2201 /* All arguments are assumed to be remotes or groups */
2202 for (i = 0; i < argc; i++)
2203 if (!add_remote_or_group(argv[i], &list))
2204 die(_("no such remote or remote group: %s"),
2205 argv[i]);
2206 } else {
2207 /* Single remote or group */
2208 (void) add_remote_or_group(argv[0], &list);
2209 if (list.nr > 1) {
2210 /* More than one remote */
2211 if (argc > 1)
2212 die(_("fetching a group and specifying refspecs does not make sense"));
2213 } else {
2214 /* Zero or one remotes */
2215 remote = remote_get(argv[0]);
2216 prune_tags_ok = (argc == 1);
2217 argc--;
2218 argv++;
2219 }
2220 }
2221
2222 if (negotiate_only) {
2223 struct oidset acked_commits = OIDSET_INIT;
2224 struct oidset_iter iter;
2225 const struct object_id *oid;
2226
2227 if (!remote)
2228 die(_("must supply remote when using --negotiate-only"));
2229 gtransport = prepare_transport(remote, 1);
2230 if (gtransport->smart_options) {
2231 gtransport->smart_options->acked_commits = &acked_commits;
2232 } else {
2233 warning(_("protocol does not support --negotiate-only, exiting"));
2234 result = 1;
2235 goto cleanup;
2236 }
2237 if (server_options.nr)
2238 gtransport->server_options = &server_options;
2239 result = transport_fetch_refs(gtransport, NULL);
2240
2241 oidset_iter_init(&acked_commits, &iter);
2242 while ((oid = oidset_iter_next(&iter)))
2243 printf("%s\n", oid_to_hex(oid));
2244 oidset_clear(&acked_commits);
2245 } else if (remote) {
2246 if (filter_options.choice || has_promisor_remote())
2247 fetch_one_setup_partial(remote);
2248 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
2249 } else {
2250 int max_children = max_jobs;
2251
2252 if (filter_options.choice)
2253 die(_("--filter can only be used with the remote "
2254 "configured in extensions.partialclone"));
2255
2256 if (atomic_fetch)
2257 die(_("--atomic can only be used when fetching "
2258 "from one remote"));
2259
2260 if (stdin_refspecs)
2261 die(_("--stdin can only be used when fetching "
2262 "from one remote"));
2263
2264 if (max_children < 0)
2265 max_children = fetch_parallel_config;
2266
2267 /* TODO should this also die if we have a previous partial-clone? */
2268 result = fetch_multiple(&list, max_children);
2269 }
2270
2271
2272 /*
2273 * This is only needed after fetch_one(), which does not fetch
2274 * submodules by itself.
2275 *
2276 * When we fetch from multiple remotes, fetch_multiple() has
2277 * already updated submodules to grab commits necessary for
2278 * the fetched history from each remote, so there is no need
2279 * to fetch submodules from here.
2280 */
2281 if (!result && remote && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
2282 struct strvec options = STRVEC_INIT;
2283 int max_children = max_jobs;
2284
2285 if (max_children < 0)
2286 max_children = submodule_fetch_jobs_config;
2287 if (max_children < 0)
2288 max_children = fetch_parallel_config;
2289
2290 add_options_to_argv(&options);
2291 result = fetch_submodules(the_repository,
2292 &options,
2293 submodule_prefix,
2294 recurse_submodules,
2295 recurse_submodules_default,
2296 verbosity < 0,
2297 max_children);
2298 strvec_clear(&options);
2299 }
2300
2301 /*
2302 * Skip irrelevant tasks because we know objects were not
2303 * fetched.
2304 *
2305 * NEEDSWORK: as a future optimization, we can return early
2306 * whenever objects were not fetched e.g. if we already have all
2307 * of them.
2308 */
2309 if (negotiate_only)
2310 goto cleanup;
2311
2312 prepare_repo_settings(the_repository);
2313 if (fetch_write_commit_graph > 0 ||
2314 (fetch_write_commit_graph < 0 &&
2315 the_repository->settings.fetch_write_commit_graph)) {
2316 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
2317
2318 if (progress)
2319 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
2320
2321 write_commit_graph_reachable(the_repository->objects->odb,
2322 commit_graph_flags,
2323 NULL);
2324 }
2325
2326 if (enable_auto_gc) {
2327 if (refetch) {
2328 /*
2329 * Hint auto-maintenance strongly to encourage repacking,
2330 * but respect config settings disabling it.
2331 */
2332 int opt_val;
2333 if (git_config_get_int("gc.autopacklimit", &opt_val))
2334 opt_val = -1;
2335 if (opt_val != 0)
2336 git_config_push_parameter("gc.autoPackLimit=1");
2337
2338 if (git_config_get_int("maintenance.incremental-repack.auto", &opt_val))
2339 opt_val = -1;
2340 if (opt_val != 0)
2341 git_config_push_parameter("maintenance.incremental-repack.auto=-1");
2342 }
2343 run_auto_maintenance(verbosity < 0);
2344 }
2345
2346 cleanup:
2347 string_list_clear(&list, 0);
2348 return result;
2349 }
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