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Merge branch 'tb/commit-graph-genv2-upgrade-fix' into maint
[git/debian.git] / builtin / fetch.c
blobac29c2b1ae34df79f8a2bd62318dc714a1f37e24
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;
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,
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, 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, "refs/tags/", 10))) {
494 int j;
495
496 free(rs->items[i].src);
497 free(rs->items[i].dst);
498
499 for (j = i + 1; j < rs->nr; j++) {
500 rs->items[j - 1] = rs->items[j];
501 rs->raw[j - 1] = rs->raw[j];
502 }
503 rs->nr--;
504 i--;
505 continue;
506 }
507
508 old_dst = rs->items[i].dst;
509 strbuf_addstr(&new_dst, "refs/prefetch/");
510
511 /*
512 * If old_dst starts with "refs/", then place
513 * sub after that prefix. Otherwise, start at
514 * the beginning of the string.
515 */
516 if (!skip_prefix(old_dst, "refs/", &sub))
517 sub = old_dst;
518 strbuf_addstr(&new_dst, sub);
519
520 rs->items[i].dst = strbuf_detach(&new_dst, NULL);
521 rs->items[i].force = 1;
522
523 free(old_dst);
524 }
525 }
526
527 static struct ref *get_ref_map(struct remote *remote,
528 const struct ref *remote_refs,
529 struct refspec *rs,
530 int tags, int *autotags)
531 {
532 int i;
533 struct ref *rm;
534 struct ref *ref_map = NULL;
535 struct ref **tail = &ref_map;
536
537 /* opportunistically-updated references: */
538 struct ref *orefs = NULL, **oref_tail = &orefs;
539
540 struct hashmap existing_refs;
541 int existing_refs_populated = 0;
542
543 filter_prefetch_refspec(rs);
544 if (remote)
545 filter_prefetch_refspec(&remote->fetch);
546
547 if (rs->nr) {
548 struct refspec *fetch_refspec;
549
550 for (i = 0; i < rs->nr; i++) {
551 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
552 if (rs->items[i].dst && rs->items[i].dst[0])
553 *autotags = 1;
554 }
555 /* Merge everything on the command line (but not --tags) */
556 for (rm = ref_map; rm; rm = rm->next)
557 rm->fetch_head_status = FETCH_HEAD_MERGE;
558
559 /*
560 * For any refs that we happen to be fetching via
561 * command-line arguments, the destination ref might
562 * have been missing or have been different than the
563 * remote-tracking ref that would be derived from the
564 * configured refspec. In these cases, we want to
565 * take the opportunity to update their configured
566 * remote-tracking reference. However, we do not want
567 * to mention these entries in FETCH_HEAD at all, as
568 * they would simply be duplicates of existing
569 * entries, so we set them FETCH_HEAD_IGNORE below.
570 *
571 * We compute these entries now, based only on the
572 * refspecs specified on the command line. But we add
573 * them to the list following the refspecs resulting
574 * from the tags option so that one of the latter,
575 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
576 * by ref_remove_duplicates() in favor of one of these
577 * opportunistic entries with FETCH_HEAD_IGNORE.
578 */
579 if (refmap.nr)
580 fetch_refspec = &refmap;
581 else
582 fetch_refspec = &remote->fetch;
583
584 for (i = 0; i < fetch_refspec->nr; i++)
585 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
586 } else if (refmap.nr) {
587 die("--refmap option is only meaningful with command-line refspec(s)");
588 } else {
589 /* Use the defaults */
590 struct branch *branch = branch_get(NULL);
591 int has_merge = branch_has_merge_config(branch);
592 if (remote &&
593 (remote->fetch.nr ||
594 /* Note: has_merge implies non-NULL branch->remote_name */
595 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
596 for (i = 0; i < remote->fetch.nr; i++) {
597 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
598 if (remote->fetch.items[i].dst &&
599 remote->fetch.items[i].dst[0])
600 *autotags = 1;
601 if (!i && !has_merge && ref_map &&
602 !remote->fetch.items[0].pattern)
603 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
604 }
605 /*
606 * if the remote we're fetching from is the same
607 * as given in branch.<name>.remote, we add the
608 * ref given in branch.<name>.merge, too.
609 *
610 * Note: has_merge implies non-NULL branch->remote_name
611 */
612 if (has_merge &&
613 !strcmp(branch->remote_name, remote->name))
614 add_merge_config(&ref_map, remote_refs, branch, &tail);
615 } else if (!prefetch) {
616 ref_map = get_remote_ref(remote_refs, "HEAD");
617 if (!ref_map)
618 die(_("couldn't find remote ref HEAD"));
619 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
620 tail = &ref_map->next;
621 }
622 }
623
624 if (tags == TAGS_SET)
625 /* also fetch all tags */
626 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
627 else if (tags == TAGS_DEFAULT && *autotags)
628 find_non_local_tags(remote_refs, NULL, &ref_map, &tail);
629
630 /* Now append any refs to be updated opportunistically: */
631 *tail = orefs;
632 for (rm = orefs; rm; rm = rm->next) {
633 rm->fetch_head_status = FETCH_HEAD_IGNORE;
634 tail = &rm->next;
635 }
636
637 /*
638 * apply negative refspecs first, before we remove duplicates. This is
639 * necessary as negative refspecs might remove an otherwise conflicting
640 * duplicate.
641 */
642 if (rs->nr)
643 ref_map = apply_negative_refspecs(ref_map, rs);
644 else
645 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
646
647 ref_map = ref_remove_duplicates(ref_map);
648
649 for (rm = ref_map; rm; rm = rm->next) {
650 if (rm->peer_ref) {
651 const char *refname = rm->peer_ref->name;
652 struct refname_hash_entry *peer_item;
653 unsigned int hash = strhash(refname);
654
655 if (!existing_refs_populated) {
656 refname_hash_init(&existing_refs);
657 for_each_ref(add_one_refname, &existing_refs);
658 existing_refs_populated = 1;
659 }
660
661 peer_item = hashmap_get_entry_from_hash(&existing_refs,
662 hash, refname,
663 struct refname_hash_entry, ent);
664 if (peer_item) {
665 struct object_id *old_oid = &peer_item->oid;
666 oidcpy(&rm->peer_ref->old_oid, old_oid);
667 }
668 }
669 }
670 if (existing_refs_populated)
671 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
672
673 return ref_map;
674 }
675
676 #define STORE_REF_ERROR_OTHER 1
677 #define STORE_REF_ERROR_DF_CONFLICT 2
678
679 static int s_update_ref(const char *action,
680 struct ref *ref,
681 struct ref_transaction *transaction,
682 int check_old)
683 {
684 char *msg;
685 char *rla = getenv("GIT_REFLOG_ACTION");
686 struct ref_transaction *our_transaction = NULL;
687 struct strbuf err = STRBUF_INIT;
688 int ret;
689
690 if (dry_run)
691 return 0;
692 if (!rla)
693 rla = default_rla.buf;
694 msg = xstrfmt("%s: %s", rla, action);
695
696 /*
697 * If no transaction was passed to us, we manage the transaction
698 * ourselves. Otherwise, we trust the caller to handle the transaction
699 * lifecycle.
700 */
701 if (!transaction) {
702 transaction = our_transaction = ref_transaction_begin(&err);
703 if (!transaction) {
704 ret = STORE_REF_ERROR_OTHER;
705 goto out;
706 }
707 }
708
709 ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
710 check_old ? &ref->old_oid : NULL,
711 0, msg, &err);
712 if (ret) {
713 ret = STORE_REF_ERROR_OTHER;
714 goto out;
715 }
716
717 if (our_transaction) {
718 switch (ref_transaction_commit(our_transaction, &err)) {
719 case 0:
720 break;
721 case TRANSACTION_NAME_CONFLICT:
722 ret = STORE_REF_ERROR_DF_CONFLICT;
723 goto out;
724 default:
725 ret = STORE_REF_ERROR_OTHER;
726 goto out;
727 }
728 }
729
730 out:
731 ref_transaction_free(our_transaction);
732 if (ret)
733 error("%s", err.buf);
734 strbuf_release(&err);
735 free(msg);
736 return ret;
737 }
738
739 static int refcol_width = 10;
740 static int compact_format;
741
742 static void adjust_refcol_width(const struct ref *ref)
743 {
744 int max, rlen, llen, len;
745
746 /* uptodate lines are only shown on high verbosity level */
747 if (verbosity <= 0 && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
748 return;
749
750 max = term_columns();
751 rlen = utf8_strwidth(prettify_refname(ref->name));
752
753 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
754
755 /*
756 * rough estimation to see if the output line is too long and
757 * should not be counted (we can't do precise calculation
758 * anyway because we don't know if the error explanation part
759 * will be printed in update_local_ref)
760 */
761 if (compact_format) {
762 llen = 0;
763 max = max * 2 / 3;
764 }
765 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
766 if (len >= max)
767 return;
768
769 /*
770 * Not precise calculation for compact mode because '*' can
771 * appear on the left hand side of '->' and shrink the column
772 * back.
773 */
774 if (refcol_width < rlen)
775 refcol_width = rlen;
776 }
777
778 static void prepare_format_display(struct ref *ref_map)
779 {
780 struct ref *rm;
781 const char *format = "full";
782
783 if (verbosity < 0)
784 return;
785
786 git_config_get_string_tmp("fetch.output", &format);
787 if (!strcasecmp(format, "full"))
788 compact_format = 0;
789 else if (!strcasecmp(format, "compact"))
790 compact_format = 1;
791 else
792 die(_("invalid value for '%s': '%s'"),
793 "fetch.output", format);
794
795 for (rm = ref_map; rm; rm = rm->next) {
796 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
797 !rm->peer_ref ||
798 !strcmp(rm->name, "HEAD"))
799 continue;
800
801 adjust_refcol_width(rm);
802 }
803 }
804
805 static void print_remote_to_local(struct strbuf *display,
806 const char *remote, const char *local)
807 {
808 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
809 }
810
811 static int find_and_replace(struct strbuf *haystack,
812 const char *needle,
813 const char *placeholder)
814 {
815 const char *p = NULL;
816 int plen, nlen;
817
818 nlen = strlen(needle);
819 if (ends_with(haystack->buf, needle))
820 p = haystack->buf + haystack->len - nlen;
821 else
822 p = strstr(haystack->buf, needle);
823 if (!p)
824 return 0;
825
826 if (p > haystack->buf && p[-1] != '/')
827 return 0;
828
829 plen = strlen(p);
830 if (plen > nlen && p[nlen] != '/')
831 return 0;
832
833 strbuf_splice(haystack, p - haystack->buf, nlen,
834 placeholder, strlen(placeholder));
835 return 1;
836 }
837
838 static void print_compact(struct strbuf *display,
839 const char *remote, const char *local)
840 {
841 struct strbuf r = STRBUF_INIT;
842 struct strbuf l = STRBUF_INIT;
843
844 if (!strcmp(remote, local)) {
845 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
846 return;
847 }
848
849 strbuf_addstr(&r, remote);
850 strbuf_addstr(&l, local);
851
852 if (!find_and_replace(&r, local, "*"))
853 find_and_replace(&l, remote, "*");
854 print_remote_to_local(display, r.buf, l.buf);
855
856 strbuf_release(&r);
857 strbuf_release(&l);
858 }
859
860 static void format_display(struct strbuf *display, char code,
861 const char *summary, const char *error,
862 const char *remote, const char *local,
863 int summary_width)
864 {
865 int width;
866
867 if (verbosity < 0)
868 return;
869
870 width = (summary_width + strlen(summary) - gettext_width(summary));
871
872 strbuf_addf(display, "%c %-*s ", code, width, summary);
873 if (!compact_format)
874 print_remote_to_local(display, remote, local);
875 else
876 print_compact(display, remote, local);
877 if (error)
878 strbuf_addf(display, " (%s)", error);
879 }
880
881 static int update_local_ref(struct ref *ref,
882 struct ref_transaction *transaction,
883 const char *remote, const struct ref *remote_ref,
884 struct strbuf *display, int summary_width,
885 struct worktree **worktrees)
886 {
887 struct commit *current = NULL, *updated;
888 const struct worktree *wt;
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 (wt = find_shared_symref(worktrees, "HEAD", ref->name)) &&
904 !wt->is_bare && !is_null_oid(&ref->old_oid)) {
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 wt->is_current ?
911 _("can't fetch in current branch") :
912 _("checked out in another worktree"),
913 remote, pretty_ref, summary_width);
914 return 1;
915 }
916
917 if (!is_null_oid(&ref->old_oid) &&
918 starts_with(ref->name, "refs/tags/")) {
919 if (force || ref->force) {
920 int r;
921 r = s_update_ref("updating tag", ref, transaction, 0);
922 format_display(display, r ? '!' : 't', _("[tag update]"),
923 r ? _("unable to update local ref") : NULL,
924 remote, pretty_ref, summary_width);
925 return r;
926 } else {
927 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
928 remote, pretty_ref, summary_width);
929 return 1;
930 }
931 }
932
933 current = lookup_commit_reference_gently(the_repository,
934 &ref->old_oid, 1);
935 updated = lookup_commit_reference_gently(the_repository,
936 &ref->new_oid, 1);
937 if (!current || !updated) {
938 const char *msg;
939 const char *what;
940 int r;
941 /*
942 * Nicely describe the new ref we're fetching.
943 * Base this on the remote's ref name, as it's
944 * more likely to follow a standard layout.
945 */
946 const char *name = remote_ref ? remote_ref->name : "";
947 if (starts_with(name, "refs/tags/")) {
948 msg = "storing tag";
949 what = _("[new tag]");
950 } else if (starts_with(name, "refs/heads/")) {
951 msg = "storing head";
952 what = _("[new branch]");
953 } else {
954 msg = "storing ref";
955 what = _("[new ref]");
956 }
957
958 r = s_update_ref(msg, ref, transaction, 0);
959 format_display(display, r ? '!' : '*', what,
960 r ? _("unable to update local ref") : NULL,
961 remote, pretty_ref, summary_width);
962 return r;
963 }
964
965 if (fetch_show_forced_updates) {
966 uint64_t t_before = getnanotime();
967 fast_forward = in_merge_bases(current, updated);
968 forced_updates_ms += (getnanotime() - t_before) / 1000000;
969 } else {
970 fast_forward = 1;
971 }
972
973 if (fast_forward) {
974 struct strbuf quickref = STRBUF_INIT;
975 int r;
976
977 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
978 strbuf_addstr(&quickref, "..");
979 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
980 r = s_update_ref("fast-forward", ref, transaction, 1);
981 format_display(display, r ? '!' : ' ', quickref.buf,
982 r ? _("unable to update local ref") : NULL,
983 remote, pretty_ref, summary_width);
984 strbuf_release(&quickref);
985 return r;
986 } else if (force || ref->force) {
987 struct strbuf quickref = STRBUF_INIT;
988 int r;
989 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
990 strbuf_addstr(&quickref, "...");
991 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
992 r = s_update_ref("forced-update", ref, transaction, 1);
993 format_display(display, r ? '!' : '+', quickref.buf,
994 r ? _("unable to update local ref") : _("forced update"),
995 remote, pretty_ref, summary_width);
996 strbuf_release(&quickref);
997 return r;
998 } else {
999 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
1000 remote, pretty_ref, summary_width);
1001 return 1;
1002 }
1003 }
1004
1005 static const struct object_id *iterate_ref_map(void *cb_data)
1006 {
1007 struct ref **rm = cb_data;
1008 struct ref *ref = *rm;
1009
1010 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
1011 ref = ref->next;
1012 if (!ref)
1013 return NULL;
1014 *rm = ref->next;
1015 return &ref->old_oid;
1016 }
1017
1018 struct fetch_head {
1019 FILE *fp;
1020 struct strbuf buf;
1021 };
1022
1023 static int open_fetch_head(struct fetch_head *fetch_head)
1024 {
1025 const char *filename = git_path_fetch_head(the_repository);
1026
1027 if (write_fetch_head) {
1028 fetch_head->fp = fopen(filename, "a");
1029 if (!fetch_head->fp)
1030 return error_errno(_("cannot open '%s'"), filename);
1031 strbuf_init(&fetch_head->buf, 0);
1032 } else {
1033 fetch_head->fp = NULL;
1034 }
1035
1036 return 0;
1037 }
1038
1039 static void append_fetch_head(struct fetch_head *fetch_head,
1040 const struct object_id *old_oid,
1041 enum fetch_head_status fetch_head_status,
1042 const char *note,
1043 const char *url, size_t url_len)
1044 {
1045 char old_oid_hex[GIT_MAX_HEXSZ + 1];
1046 const char *merge_status_marker;
1047 size_t i;
1048
1049 if (!fetch_head->fp)
1050 return;
1051
1052 switch (fetch_head_status) {
1053 case FETCH_HEAD_NOT_FOR_MERGE:
1054 merge_status_marker = "not-for-merge";
1055 break;
1056 case FETCH_HEAD_MERGE:
1057 merge_status_marker = "";
1058 break;
1059 default:
1060 /* do not write anything to FETCH_HEAD */
1061 return;
1062 }
1063
1064 strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
1065 oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
1066 for (i = 0; i < url_len; ++i)
1067 if ('\n' == url[i])
1068 strbuf_addstr(&fetch_head->buf, "\\n");
1069 else
1070 strbuf_addch(&fetch_head->buf, url[i]);
1071 strbuf_addch(&fetch_head->buf, '\n');
1072
1073 /*
1074 * When using an atomic fetch, we do not want to update FETCH_HEAD if
1075 * any of the reference updates fails. We thus have to write all
1076 * updates to a buffer first and only commit it as soon as all
1077 * references have been successfully updated.
1078 */
1079 if (!atomic_fetch) {
1080 strbuf_write(&fetch_head->buf, fetch_head->fp);
1081 strbuf_reset(&fetch_head->buf);
1082 }
1083 }
1084
1085 static void commit_fetch_head(struct fetch_head *fetch_head)
1086 {
1087 if (!fetch_head->fp || !atomic_fetch)
1088 return;
1089 strbuf_write(&fetch_head->buf, fetch_head->fp);
1090 }
1091
1092 static void close_fetch_head(struct fetch_head *fetch_head)
1093 {
1094 if (!fetch_head->fp)
1095 return;
1096
1097 fclose(fetch_head->fp);
1098 strbuf_release(&fetch_head->buf);
1099 }
1100
1101 static const char warn_show_forced_updates[] =
1102 N_("fetch normally indicates which branches had a forced update,\n"
1103 "but that check has been disabled; to re-enable, use '--show-forced-updates'\n"
1104 "flag or run 'git config fetch.showForcedUpdates true'");
1105 static const char warn_time_show_forced_updates[] =
1106 N_("it took %.2f seconds to check forced updates; you can use\n"
1107 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
1108 "to avoid this check\n");
1109
1110 static int store_updated_refs(const char *raw_url, const char *remote_name,
1111 int connectivity_checked,
1112 struct ref_transaction *transaction, struct ref *ref_map,
1113 struct fetch_head *fetch_head, struct worktree **worktrees)
1114 {
1115 int url_len, i, rc = 0;
1116 struct strbuf note = STRBUF_INIT, err = STRBUF_INIT;
1117 const char *what, *kind;
1118 struct ref *rm;
1119 char *url;
1120 int want_status;
1121 int summary_width = 0;
1122
1123 if (verbosity >= 0)
1124 summary_width = transport_summary_width(ref_map);
1125
1126 if (raw_url)
1127 url = transport_anonymize_url(raw_url);
1128 else
1129 url = xstrdup("foreign");
1130
1131 if (!connectivity_checked) {
1132 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1133
1134 rm = ref_map;
1135 if (check_connected(iterate_ref_map, &rm, &opt)) {
1136 rc = error(_("%s did not send all necessary objects\n"), url);
1137 goto abort;
1138 }
1139 }
1140
1141 prepare_format_display(ref_map);
1142
1143 /*
1144 * We do a pass for each fetch_head_status type in their enum order, so
1145 * merged entries are written before not-for-merge. That lets readers
1146 * use FETCH_HEAD as a refname to refer to the ref to be merged.
1147 */
1148 for (want_status = FETCH_HEAD_MERGE;
1149 want_status <= FETCH_HEAD_IGNORE;
1150 want_status++) {
1151 for (rm = ref_map; rm; rm = rm->next) {
1152 struct ref *ref = NULL;
1153
1154 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
1155 if (want_status == FETCH_HEAD_MERGE)
1156 warning(_("rejected %s because shallow roots are not allowed to be updated"),
1157 rm->peer_ref ? rm->peer_ref->name : rm->name);
1158 continue;
1159 }
1160
1161 /*
1162 * When writing FETCH_HEAD we need to determine whether
1163 * we already have the commit or not. If not, then the
1164 * reference is not for merge and needs to be written
1165 * to the reflog after other commits which we already
1166 * have. We're not interested in this property though
1167 * in case FETCH_HEAD is not to be updated, so we can
1168 * skip the classification in that case.
1169 */
1170 if (fetch_head->fp) {
1171 struct commit *commit = NULL;
1172
1173 /*
1174 * References in "refs/tags/" are often going to point
1175 * to annotated tags, which are not part of the
1176 * commit-graph. We thus only try to look up refs in
1177 * the graph which are not in that namespace to not
1178 * regress performance in repositories with many
1179 * annotated tags.
1180 */
1181 if (!starts_with(rm->name, "refs/tags/"))
1182 commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
1183 if (!commit) {
1184 commit = lookup_commit_reference_gently(the_repository,
1185 &rm->old_oid,
1186 1);
1187 if (!commit)
1188 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
1189 }
1190 }
1191
1192 if (rm->fetch_head_status != want_status)
1193 continue;
1194
1195 if (rm->peer_ref) {
1196 ref = alloc_ref(rm->peer_ref->name);
1197 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
1198 oidcpy(&ref->new_oid, &rm->old_oid);
1199 ref->force = rm->peer_ref->force;
1200 }
1201
1202 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
1203 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
1204 check_for_new_submodule_commits(&rm->old_oid);
1205 }
1206
1207 if (!strcmp(rm->name, "HEAD")) {
1208 kind = "";
1209 what = "";
1210 }
1211 else if (skip_prefix(rm->name, "refs/heads/", &what))
1212 kind = "branch";
1213 else if (skip_prefix(rm->name, "refs/tags/", &what))
1214 kind = "tag";
1215 else if (skip_prefix(rm->name, "refs/remotes/", &what))
1216 kind = "remote-tracking branch";
1217 else {
1218 kind = "";
1219 what = rm->name;
1220 }
1221
1222 url_len = strlen(url);
1223 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1224 ;
1225 url_len = i + 1;
1226 if (4 < i && !strncmp(".git", url + i - 3, 4))
1227 url_len = i - 3;
1228
1229 strbuf_reset(&note);
1230 if (*what) {
1231 if (*kind)
1232 strbuf_addf(&note, "%s ", kind);
1233 strbuf_addf(&note, "'%s' of ", what);
1234 }
1235
1236 append_fetch_head(fetch_head, &rm->old_oid,
1237 rm->fetch_head_status,
1238 note.buf, url, url_len);
1239
1240 strbuf_reset(&note);
1241 if (ref) {
1242 rc |= update_local_ref(ref, transaction, what,
1243 rm, &note, summary_width,
1244 worktrees);
1245 free(ref);
1246 } else if (write_fetch_head || dry_run) {
1247 /*
1248 * Display fetches written to FETCH_HEAD (or
1249 * would be written to FETCH_HEAD, if --dry-run
1250 * is set).
1251 */
1252 format_display(&note, '*',
1253 *kind ? kind : "branch", NULL,
1254 *what ? what : "HEAD",
1255 "FETCH_HEAD", summary_width);
1256 }
1257 if (note.len) {
1258 if (!shown_url) {
1259 fprintf(stderr, _("From %.*s\n"),
1260 url_len, url);
1261 shown_url = 1;
1262 }
1263 fprintf(stderr, " %s\n", note.buf);
1264 }
1265 }
1266 }
1267
1268 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1269 error(_("some local refs could not be updated; try running\n"
1270 " 'git remote prune %s' to remove any old, conflicting "
1271 "branches"), remote_name);
1272
1273 if (advice_enabled(ADVICE_FETCH_SHOW_FORCED_UPDATES)) {
1274 if (!fetch_show_forced_updates) {
1275 warning(_(warn_show_forced_updates));
1276 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1277 warning(_(warn_time_show_forced_updates),
1278 forced_updates_ms / 1000.0);
1279 }
1280 }
1281
1282 abort:
1283 strbuf_release(&note);
1284 strbuf_release(&err);
1285 free(url);
1286 return rc;
1287 }
1288
1289 /*
1290 * We would want to bypass the object transfer altogether if
1291 * everything we are going to fetch already exists and is connected
1292 * locally.
1293 */
1294 static int check_exist_and_connected(struct ref *ref_map)
1295 {
1296 struct ref *rm = ref_map;
1297 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1298 struct ref *r;
1299
1300 /*
1301 * If we are deepening a shallow clone we already have these
1302 * objects reachable. Running rev-list here will return with
1303 * a good (0) exit status and we'll bypass the fetch that we
1304 * really need to perform. Claiming failure now will ensure
1305 * we perform the network exchange to deepen our history.
1306 */
1307 if (deepen)
1308 return -1;
1309
1310 /*
1311 * Similarly, if we need to refetch, we always want to perform a full
1312 * fetch ignoring existing objects.
1313 */
1314 if (refetch)
1315 return -1;
1316
1317
1318 /*
1319 * check_connected() allows objects to merely be promised, but
1320 * we need all direct targets to exist.
1321 */
1322 for (r = rm; r; r = r->next) {
1323 if (!has_object_file_with_flags(&r->old_oid,
1324 OBJECT_INFO_SKIP_FETCH_OBJECT))
1325 return -1;
1326 }
1327
1328 opt.quiet = 1;
1329 return check_connected(iterate_ref_map, &rm, &opt);
1330 }
1331
1332 static int fetch_and_consume_refs(struct transport *transport,
1333 struct ref_transaction *transaction,
1334 struct ref *ref_map,
1335 struct fetch_head *fetch_head,
1336 struct worktree **worktrees)
1337 {
1338 int connectivity_checked = 1;
1339 int ret;
1340
1341 /*
1342 * We don't need to perform a fetch in case we can already satisfy all
1343 * refs.
1344 */
1345 ret = check_exist_and_connected(ref_map);
1346 if (ret) {
1347 trace2_region_enter("fetch", "fetch_refs", the_repository);
1348 ret = transport_fetch_refs(transport, ref_map);
1349 trace2_region_leave("fetch", "fetch_refs", the_repository);
1350 if (ret)
1351 goto out;
1352 connectivity_checked = transport->smart_options ?
1353 transport->smart_options->connectivity_checked : 0;
1354 }
1355
1356 trace2_region_enter("fetch", "consume_refs", the_repository);
1357 ret = store_updated_refs(transport->url, transport->remote->name,
1358 connectivity_checked, transaction, ref_map,
1359 fetch_head, worktrees);
1360 trace2_region_leave("fetch", "consume_refs", the_repository);
1361
1362 out:
1363 transport_unlock_pack(transport, 0);
1364 return ret;
1365 }
1366
1367 static int prune_refs(struct refspec *rs,
1368 struct ref_transaction *transaction,
1369 struct ref *ref_map,
1370 const char *raw_url)
1371 {
1372 int url_len, i, result = 0;
1373 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1374 struct strbuf err = STRBUF_INIT;
1375 char *url;
1376 const char *dangling_msg = dry_run
1377 ? _(" (%s will become dangling)")
1378 : _(" (%s has become dangling)");
1379
1380 if (raw_url)
1381 url = transport_anonymize_url(raw_url);
1382 else
1383 url = xstrdup("foreign");
1384
1385 url_len = strlen(url);
1386 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1387 ;
1388
1389 url_len = i + 1;
1390 if (4 < i && !strncmp(".git", url + i - 3, 4))
1391 url_len = i - 3;
1392
1393 if (!dry_run) {
1394 if (transaction) {
1395 for (ref = stale_refs; ref; ref = ref->next) {
1396 result = ref_transaction_delete(transaction, ref->name, NULL, 0,
1397 "fetch: prune", &err);
1398 if (result)
1399 goto cleanup;
1400 }
1401 } else {
1402 struct string_list refnames = STRING_LIST_INIT_NODUP;
1403
1404 for (ref = stale_refs; ref; ref = ref->next)
1405 string_list_append(&refnames, ref->name);
1406
1407 result = delete_refs("fetch: prune", &refnames, 0);
1408 string_list_clear(&refnames, 0);
1409 }
1410 }
1411
1412 if (verbosity >= 0) {
1413 int summary_width = transport_summary_width(stale_refs);
1414
1415 for (ref = stale_refs; ref; ref = ref->next) {
1416 struct strbuf sb = STRBUF_INIT;
1417 if (!shown_url) {
1418 fprintf(stderr, _("From %.*s\n"), url_len, url);
1419 shown_url = 1;
1420 }
1421 format_display(&sb, '-', _("[deleted]"), NULL,
1422 _("(none)"), prettify_refname(ref->name),
1423 summary_width);
1424 fprintf(stderr, " %s\n",sb.buf);
1425 strbuf_release(&sb);
1426 warn_dangling_symref(stderr, dangling_msg, ref->name);
1427 }
1428 }
1429
1430 cleanup:
1431 strbuf_release(&err);
1432 free(url);
1433 free_refs(stale_refs);
1434 return result;
1435 }
1436
1437 static void check_not_current_branch(struct ref *ref_map,
1438 struct worktree **worktrees)
1439 {
1440 const struct worktree *wt;
1441 for (; ref_map; ref_map = ref_map->next)
1442 if (ref_map->peer_ref &&
1443 starts_with(ref_map->peer_ref->name, "refs/heads/") &&
1444 (wt = find_shared_symref(worktrees, "HEAD",
1445 ref_map->peer_ref->name)) &&
1446 !wt->is_bare)
1447 die(_("refusing to fetch into branch '%s' "
1448 "checked out at '%s'"),
1449 ref_map->peer_ref->name, wt->path);
1450 }
1451
1452 static int truncate_fetch_head(void)
1453 {
1454 const char *filename = git_path_fetch_head(the_repository);
1455 FILE *fp = fopen_for_writing(filename);
1456
1457 if (!fp)
1458 return error_errno(_("cannot open '%s'"), filename);
1459 fclose(fp);
1460 return 0;
1461 }
1462
1463 static void set_option(struct transport *transport, const char *name, const char *value)
1464 {
1465 int r = transport_set_option(transport, name, value);
1466 if (r < 0)
1467 die(_("option \"%s\" value \"%s\" is not valid for %s"),
1468 name, value, transport->url);
1469 if (r > 0)
1470 warning(_("option \"%s\" is ignored for %s\n"),
1471 name, transport->url);
1472 }
1473
1474
1475 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1476 void *cb_data)
1477 {
1478 struct oid_array *oids = cb_data;
1479
1480 oid_array_append(oids, oid);
1481 return 0;
1482 }
1483
1484 static void add_negotiation_tips(struct git_transport_options *smart_options)
1485 {
1486 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1487 int i;
1488
1489 for (i = 0; i < negotiation_tip.nr; i++) {
1490 const char *s = negotiation_tip.items[i].string;
1491 int old_nr;
1492 if (!has_glob_specials(s)) {
1493 struct object_id oid;
1494 if (get_oid(s, &oid))
1495 die(_("%s is not a valid object"), s);
1496 if (!has_object(the_repository, &oid, 0))
1497 die(_("the object %s does not exist"), s);
1498 oid_array_append(oids, &oid);
1499 continue;
1500 }
1501 old_nr = oids->nr;
1502 for_each_glob_ref(add_oid, s, oids);
1503 if (old_nr == oids->nr)
1504 warning("ignoring --negotiation-tip=%s because it does not match any refs",
1505 s);
1506 }
1507 smart_options->negotiation_tips = oids;
1508 }
1509
1510 static struct transport *prepare_transport(struct remote *remote, int deepen)
1511 {
1512 struct transport *transport;
1513
1514 transport = transport_get(remote, NULL);
1515 transport_set_verbosity(transport, verbosity, progress);
1516 transport->family = family;
1517 if (upload_pack)
1518 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1519 if (keep)
1520 set_option(transport, TRANS_OPT_KEEP, "yes");
1521 if (depth)
1522 set_option(transport, TRANS_OPT_DEPTH, depth);
1523 if (deepen && deepen_since)
1524 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1525 if (deepen && deepen_not.nr)
1526 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1527 (const char *)&deepen_not);
1528 if (deepen_relative)
1529 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1530 if (update_shallow)
1531 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1532 if (refetch)
1533 set_option(transport, TRANS_OPT_REFETCH, "yes");
1534 if (filter_options.choice) {
1535 const char *spec =
1536 expand_list_objects_filter_spec(&filter_options);
1537 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1538 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1539 }
1540 if (negotiation_tip.nr) {
1541 if (transport->smart_options)
1542 add_negotiation_tips(transport->smart_options);
1543 else
1544 warning("ignoring --negotiation-tip because the protocol does not support it");
1545 }
1546 return transport;
1547 }
1548
1549 static int backfill_tags(struct transport *transport,
1550 struct ref_transaction *transaction,
1551 struct ref *ref_map,
1552 struct fetch_head *fetch_head,
1553 struct worktree **worktrees)
1554 {
1555 int retcode, cannot_reuse;
1556
1557 /*
1558 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1559 * when remote helper is used (setting it to an empty string
1560 * is not unsetting). We could extend the remote helper
1561 * protocol for that, but for now, just force a new connection
1562 * without deepen-since. Similar story for deepen-not.
1563 */
1564 cannot_reuse = transport->cannot_reuse ||
1565 deepen_since || deepen_not.nr;
1566 if (cannot_reuse) {
1567 gsecondary = prepare_transport(transport->remote, 0);
1568 transport = gsecondary;
1569 }
1570
1571 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1572 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1573 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1574 retcode = fetch_and_consume_refs(transport, transaction, ref_map, fetch_head, worktrees);
1575
1576 if (gsecondary) {
1577 transport_disconnect(gsecondary);
1578 gsecondary = NULL;
1579 }
1580
1581 return retcode;
1582 }
1583
1584 static int do_fetch(struct transport *transport,
1585 struct refspec *rs)
1586 {
1587 struct ref_transaction *transaction = NULL;
1588 struct ref *ref_map = NULL;
1589 int autotags = (transport->remote->fetch_tags == 1);
1590 int retcode = 0;
1591 const struct ref *remote_refs;
1592 struct transport_ls_refs_options transport_ls_refs_options =
1593 TRANSPORT_LS_REFS_OPTIONS_INIT;
1594 int must_list_refs = 1;
1595 struct worktree **worktrees = get_worktrees();
1596 struct fetch_head fetch_head = { 0 };
1597 struct strbuf err = STRBUF_INIT;
1598
1599 if (tags == TAGS_DEFAULT) {
1600 if (transport->remote->fetch_tags == 2)
1601 tags = TAGS_SET;
1602 if (transport->remote->fetch_tags == -1)
1603 tags = TAGS_UNSET;
1604 }
1605
1606 /* if not appending, truncate FETCH_HEAD */
1607 if (!append && write_fetch_head) {
1608 retcode = truncate_fetch_head();
1609 if (retcode)
1610 goto cleanup;
1611 }
1612
1613 if (rs->nr) {
1614 int i;
1615
1616 refspec_ref_prefixes(rs, &transport_ls_refs_options.ref_prefixes);
1617
1618 /*
1619 * We can avoid listing refs if all of them are exact
1620 * OIDs
1621 */
1622 must_list_refs = 0;
1623 for (i = 0; i < rs->nr; i++) {
1624 if (!rs->items[i].exact_sha1) {
1625 must_list_refs = 1;
1626 break;
1627 }
1628 }
1629 } else if (transport->remote && transport->remote->fetch.nr)
1630 refspec_ref_prefixes(&transport->remote->fetch,
1631 &transport_ls_refs_options.ref_prefixes);
1632
1633 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1634 must_list_refs = 1;
1635 if (transport_ls_refs_options.ref_prefixes.nr)
1636 strvec_push(&transport_ls_refs_options.ref_prefixes,
1637 "refs/tags/");
1638 }
1639
1640 if (must_list_refs) {
1641 trace2_region_enter("fetch", "remote_refs", the_repository);
1642 remote_refs = transport_get_remote_refs(transport,
1643 &transport_ls_refs_options);
1644 trace2_region_leave("fetch", "remote_refs", the_repository);
1645 } else
1646 remote_refs = NULL;
1647
1648 transport_ls_refs_options_release(&transport_ls_refs_options);
1649
1650 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1651 tags, &autotags);
1652 if (!update_head_ok)
1653 check_not_current_branch(ref_map, worktrees);
1654
1655 retcode = open_fetch_head(&fetch_head);
1656 if (retcode)
1657 goto cleanup;
1658
1659 if (atomic_fetch) {
1660 transaction = ref_transaction_begin(&err);
1661 if (!transaction) {
1662 retcode = error("%s", err.buf);
1663 goto cleanup;
1664 }
1665 }
1666
1667 if (tags == TAGS_DEFAULT && autotags)
1668 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1669 if (prune) {
1670 /*
1671 * We only prune based on refspecs specified
1672 * explicitly (via command line or configuration); we
1673 * don't care whether --tags was specified.
1674 */
1675 if (rs->nr) {
1676 retcode = prune_refs(rs, transaction, ref_map, transport->url);
1677 } else {
1678 retcode = prune_refs(&transport->remote->fetch,
1679 transaction, ref_map,
1680 transport->url);
1681 }
1682 if (retcode != 0)
1683 retcode = 1;
1684 }
1685
1686 if (fetch_and_consume_refs(transport, transaction, ref_map, &fetch_head, worktrees)) {
1687 retcode = 1;
1688 goto cleanup;
1689 }
1690
1691 /*
1692 * If neither --no-tags nor --tags was specified, do automated tag
1693 * following.
1694 */
1695 if (tags == TAGS_DEFAULT && autotags) {
1696 struct ref *tags_ref_map = NULL, **tail = &tags_ref_map;
1697
1698 find_non_local_tags(remote_refs, transaction, &tags_ref_map, &tail);
1699 if (tags_ref_map) {
1700 /*
1701 * If backfilling of tags fails then we want to tell
1702 * the user so, but we have to continue regardless to
1703 * populate upstream information of the references we
1704 * have already fetched above. The exception though is
1705 * when `--atomic` is passed: in that case we'll abort
1706 * the transaction and don't commit anything.
1707 */
1708 if (backfill_tags(transport, transaction, tags_ref_map,
1709 &fetch_head, worktrees))
1710 retcode = 1;
1711 }
1712
1713 free_refs(tags_ref_map);
1714 }
1715
1716 if (transaction) {
1717 if (retcode)
1718 goto cleanup;
1719
1720 retcode = ref_transaction_commit(transaction, &err);
1721 if (retcode) {
1722 error("%s", err.buf);
1723 ref_transaction_free(transaction);
1724 transaction = NULL;
1725 goto cleanup;
1726 }
1727 }
1728
1729 commit_fetch_head(&fetch_head);
1730
1731 if (set_upstream) {
1732 struct branch *branch = branch_get("HEAD");
1733 struct ref *rm;
1734 struct ref *source_ref = NULL;
1735
1736 /*
1737 * We're setting the upstream configuration for the
1738 * current branch. The relevant upstream is the
1739 * fetched branch that is meant to be merged with the
1740 * current one, i.e. the one fetched to FETCH_HEAD.
1741 *
1742 * When there are several such branches, consider the
1743 * request ambiguous and err on the safe side by doing
1744 * nothing and just emit a warning.
1745 */
1746 for (rm = ref_map; rm; rm = rm->next) {
1747 if (!rm->peer_ref) {
1748 if (source_ref) {
1749 warning(_("multiple branches detected, incompatible with --set-upstream"));
1750 goto cleanup;
1751 } else {
1752 source_ref = rm;
1753 }
1754 }
1755 }
1756 if (source_ref) {
1757 if (!branch) {
1758 const char *shortname = source_ref->name;
1759 skip_prefix(shortname, "refs/heads/", &shortname);
1760
1761 warning(_("could not set upstream of HEAD to '%s' from '%s' when "
1762 "it does not point to any branch."),
1763 shortname, transport->remote->name);
1764 goto cleanup;
1765 }
1766
1767 if (!strcmp(source_ref->name, "HEAD") ||
1768 starts_with(source_ref->name, "refs/heads/"))
1769 install_branch_config(0,
1770 branch->name,
1771 transport->remote->name,
1772 source_ref->name);
1773 else if (starts_with(source_ref->name, "refs/remotes/"))
1774 warning(_("not setting upstream for a remote remote-tracking branch"));
1775 else if (starts_with(source_ref->name, "refs/tags/"))
1776 warning(_("not setting upstream for a remote tag"));
1777 else
1778 warning(_("unknown branch type"));
1779 } else {
1780 warning(_("no source branch found;\n"
1781 "you need to specify exactly one branch with the --set-upstream option"));
1782 }
1783 }
1784
1785 cleanup:
1786 if (retcode && transaction) {
1787 ref_transaction_abort(transaction, &err);
1788 error("%s", err.buf);
1789 }
1790
1791 close_fetch_head(&fetch_head);
1792 strbuf_release(&err);
1793 free_refs(ref_map);
1794 free_worktrees(worktrees);
1795 return retcode;
1796 }
1797
1798 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1799 {
1800 struct string_list *list = priv;
1801 if (!remote->skip_default_update)
1802 string_list_append(list, remote->name);
1803 return 0;
1804 }
1805
1806 struct remote_group_data {
1807 const char *name;
1808 struct string_list *list;
1809 };
1810
1811 static int get_remote_group(const char *key, const char *value, void *priv)
1812 {
1813 struct remote_group_data *g = priv;
1814
1815 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1816 /* split list by white space */
1817 while (*value) {
1818 size_t wordlen = strcspn(value, " \t\n");
1819
1820 if (wordlen >= 1)
1821 string_list_append_nodup(g->list,
1822 xstrndup(value, wordlen));
1823 value += wordlen + (value[wordlen] != '\0');
1824 }
1825 }
1826
1827 return 0;
1828 }
1829
1830 static int add_remote_or_group(const char *name, struct string_list *list)
1831 {
1832 int prev_nr = list->nr;
1833 struct remote_group_data g;
1834 g.name = name; g.list = list;
1835
1836 git_config(get_remote_group, &g);
1837 if (list->nr == prev_nr) {
1838 struct remote *remote = remote_get(name);
1839 if (!remote_is_configured(remote, 0))
1840 return 0;
1841 string_list_append(list, remote->name);
1842 }
1843 return 1;
1844 }
1845
1846 static void add_options_to_argv(struct strvec *argv)
1847 {
1848 if (dry_run)
1849 strvec_push(argv, "--dry-run");
1850 if (prune != -1)
1851 strvec_push(argv, prune ? "--prune" : "--no-prune");
1852 if (prune_tags != -1)
1853 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1854 if (update_head_ok)
1855 strvec_push(argv, "--update-head-ok");
1856 if (force)
1857 strvec_push(argv, "--force");
1858 if (keep)
1859 strvec_push(argv, "--keep");
1860 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1861 strvec_push(argv, "--recurse-submodules");
1862 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1863 strvec_push(argv, "--recurse-submodules=on-demand");
1864 if (tags == TAGS_SET)
1865 strvec_push(argv, "--tags");
1866 else if (tags == TAGS_UNSET)
1867 strvec_push(argv, "--no-tags");
1868 if (verbosity >= 2)
1869 strvec_push(argv, "-v");
1870 if (verbosity >= 1)
1871 strvec_push(argv, "-v");
1872 else if (verbosity < 0)
1873 strvec_push(argv, "-q");
1874 if (family == TRANSPORT_FAMILY_IPV4)
1875 strvec_push(argv, "--ipv4");
1876 else if (family == TRANSPORT_FAMILY_IPV6)
1877 strvec_push(argv, "--ipv6");
1878 }
1879
1880 /* Fetch multiple remotes in parallel */
1881
1882 struct parallel_fetch_state {
1883 const char **argv;
1884 struct string_list *remotes;
1885 int next, result;
1886 };
1887
1888 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1889 void *cb, void **task_cb)
1890 {
1891 struct parallel_fetch_state *state = cb;
1892 char *remote;
1893
1894 if (state->next < 0 || state->next >= state->remotes->nr)
1895 return 0;
1896
1897 remote = state->remotes->items[state->next++].string;
1898 *task_cb = remote;
1899
1900 strvec_pushv(&cp->args, state->argv);
1901 strvec_push(&cp->args, remote);
1902 cp->git_cmd = 1;
1903
1904 if (verbosity >= 0)
1905 printf(_("Fetching %s\n"), remote);
1906
1907 return 1;
1908 }
1909
1910 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1911 {
1912 struct parallel_fetch_state *state = cb;
1913 const char *remote = task_cb;
1914
1915 state->result = error(_("could not fetch %s"), remote);
1916
1917 return 0;
1918 }
1919
1920 static int fetch_finished(int result, struct strbuf *out,
1921 void *cb, void *task_cb)
1922 {
1923 struct parallel_fetch_state *state = cb;
1924 const char *remote = task_cb;
1925
1926 if (result) {
1927 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1928 remote, result);
1929 state->result = -1;
1930 }
1931
1932 return 0;
1933 }
1934
1935 static int fetch_multiple(struct string_list *list, int max_children)
1936 {
1937 int i, result = 0;
1938 struct strvec argv = STRVEC_INIT;
1939
1940 if (!append && write_fetch_head) {
1941 int errcode = truncate_fetch_head();
1942 if (errcode)
1943 return errcode;
1944 }
1945
1946 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1947 "--no-write-commit-graph", NULL);
1948 add_options_to_argv(&argv);
1949
1950 if (max_children != 1 && list->nr != 1) {
1951 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1952
1953 strvec_push(&argv, "--end-of-options");
1954 result = run_processes_parallel_tr2(max_children,
1955 &fetch_next_remote,
1956 &fetch_failed_to_start,
1957 &fetch_finished,
1958 &state,
1959 "fetch", "parallel/fetch");
1960
1961 if (!result)
1962 result = state.result;
1963 } else
1964 for (i = 0; i < list->nr; i++) {
1965 const char *name = list->items[i].string;
1966 strvec_push(&argv, name);
1967 if (verbosity >= 0)
1968 printf(_("Fetching %s\n"), name);
1969 if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1970 error(_("could not fetch %s"), name);
1971 result = 1;
1972 }
1973 strvec_pop(&argv);
1974 }
1975
1976 strvec_clear(&argv);
1977 return !!result;
1978 }
1979
1980 /*
1981 * Fetching from the promisor remote should use the given filter-spec
1982 * or inherit the default filter-spec from the config.
1983 */
1984 static inline void fetch_one_setup_partial(struct remote *remote)
1985 {
1986 /*
1987 * Explicit --no-filter argument overrides everything, regardless
1988 * of any prior partial clones and fetches.
1989 */
1990 if (filter_options.no_filter)
1991 return;
1992
1993 /*
1994 * If no prior partial clone/fetch and the current fetch DID NOT
1995 * request a partial-fetch, do a normal fetch.
1996 */
1997 if (!has_promisor_remote() && !filter_options.choice)
1998 return;
1999
2000 /*
2001 * If this is a partial-fetch request, we enable partial on
2002 * this repo if not already enabled and remember the given
2003 * filter-spec as the default for subsequent fetches to this
2004 * remote if there is currently no default filter-spec.
2005 */
2006 if (filter_options.choice) {
2007 partial_clone_register(remote->name, &filter_options);
2008 return;
2009 }
2010
2011 /*
2012 * Do a partial-fetch from the promisor remote using either the
2013 * explicitly given filter-spec or inherit the filter-spec from
2014 * the config.
2015 */
2016 if (!filter_options.choice)
2017 partial_clone_get_default_filter_spec(&filter_options, remote->name);
2018 return;
2019 }
2020
2021 static int fetch_one(struct remote *remote, int argc, const char **argv,
2022 int prune_tags_ok, int use_stdin_refspecs)
2023 {
2024 struct refspec rs = REFSPEC_INIT_FETCH;
2025 int i;
2026 int exit_code;
2027 int maybe_prune_tags;
2028 int remote_via_config = remote_is_configured(remote, 0);
2029
2030 if (!remote)
2031 die(_("no remote repository specified; please specify either a URL or a\n"
2032 "remote name from which new revisions should be fetched"));
2033
2034 gtransport = prepare_transport(remote, 1);
2035
2036 if (prune < 0) {
2037 /* no command line request */
2038 if (0 <= remote->prune)
2039 prune = remote->prune;
2040 else if (0 <= fetch_prune_config)
2041 prune = fetch_prune_config;
2042 else
2043 prune = PRUNE_BY_DEFAULT;
2044 }
2045
2046 if (prune_tags < 0) {
2047 /* no command line request */
2048 if (0 <= remote->prune_tags)
2049 prune_tags = remote->prune_tags;
2050 else if (0 <= fetch_prune_tags_config)
2051 prune_tags = fetch_prune_tags_config;
2052 else
2053 prune_tags = PRUNE_TAGS_BY_DEFAULT;
2054 }
2055
2056 maybe_prune_tags = prune_tags_ok && prune_tags;
2057 if (maybe_prune_tags && remote_via_config)
2058 refspec_append(&remote->fetch, TAG_REFSPEC);
2059
2060 if (maybe_prune_tags && (argc || !remote_via_config))
2061 refspec_append(&rs, TAG_REFSPEC);
2062
2063 for (i = 0; i < argc; i++) {
2064 if (!strcmp(argv[i], "tag")) {
2065 i++;
2066 if (i >= argc)
2067 die(_("you need to specify a tag name"));
2068
2069 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
2070 argv[i], argv[i]);
2071 } else {
2072 refspec_append(&rs, argv[i]);
2073 }
2074 }
2075
2076 if (use_stdin_refspecs) {
2077 struct strbuf line = STRBUF_INIT;
2078 while (strbuf_getline_lf(&line, stdin) != EOF)
2079 refspec_append(&rs, line.buf);
2080 strbuf_release(&line);
2081 }
2082
2083 if (server_options.nr)
2084 gtransport->server_options = &server_options;
2085
2086 sigchain_push_common(unlock_pack_on_signal);
2087 atexit(unlock_pack_atexit);
2088 sigchain_push(SIGPIPE, SIG_IGN);
2089 exit_code = do_fetch(gtransport, &rs);
2090 sigchain_pop(SIGPIPE);
2091 refspec_clear(&rs);
2092 transport_disconnect(gtransport);
2093 gtransport = NULL;
2094 return exit_code;
2095 }
2096
2097 int cmd_fetch(int argc, const char **argv, const char *prefix)
2098 {
2099 int i;
2100 struct string_list list = STRING_LIST_INIT_DUP;
2101 struct remote *remote = NULL;
2102 int result = 0;
2103 int prune_tags_ok = 1;
2104
2105 packet_trace_identity("fetch");
2106
2107 /* Record the command line for the reflog */
2108 strbuf_addstr(&default_rla, "fetch");
2109 for (i = 1; i < argc; i++) {
2110 /* This handles non-URLs gracefully */
2111 char *anon = transport_anonymize_url(argv[i]);
2112
2113 strbuf_addf(&default_rla, " %s", anon);
2114 free(anon);
2115 }
2116
2117 git_config(git_fetch_config, NULL);
2118 if (the_repository->gitdir) {
2119 prepare_repo_settings(the_repository);
2120 the_repository->settings.command_requires_full_index = 0;
2121 }
2122
2123 argc = parse_options(argc, argv, prefix,
2124 builtin_fetch_options, builtin_fetch_usage, 0);
2125
2126 if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT)
2127 recurse_submodules = recurse_submodules_cli;
2128
2129 if (negotiate_only) {
2130 switch (recurse_submodules_cli) {
2131 case RECURSE_SUBMODULES_OFF:
2132 case RECURSE_SUBMODULES_DEFAULT:
2133 /*
2134 * --negotiate-only should never recurse into
2135 * submodules. Skip it by setting recurse_submodules to
2136 * RECURSE_SUBMODULES_OFF.
2137 */
2138 recurse_submodules = RECURSE_SUBMODULES_OFF;
2139 break;
2140
2141 default:
2142 die(_("options '%s' and '%s' cannot be used together"),
2143 "--negotiate-only", "--recurse-submodules");
2144 }
2145 }
2146
2147 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
2148 int *sfjc = submodule_fetch_jobs_config == -1
2149 ? &submodule_fetch_jobs_config : NULL;
2150 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
2151 ? &recurse_submodules : NULL;
2152
2153 fetch_config_from_gitmodules(sfjc, rs);
2154 }
2155
2156 if (negotiate_only && !negotiation_tip.nr)
2157 die(_("--negotiate-only needs one or more --negotiation-tip=*"));
2158
2159 if (deepen_relative) {
2160 if (deepen_relative < 0)
2161 die(_("negative depth in --deepen is not supported"));
2162 if (depth)
2163 die(_("options '%s' and '%s' cannot be used together"), "--deepen", "--depth");
2164 depth = xstrfmt("%d", deepen_relative);
2165 }
2166 if (unshallow) {
2167 if (depth)
2168 die(_("options '%s' and '%s' cannot be used together"), "--depth", "--unshallow");
2169 else if (!is_repository_shallow(the_repository))
2170 die(_("--unshallow on a complete repository does not make sense"));
2171 else
2172 depth = xstrfmt("%d", INFINITE_DEPTH);
2173 }
2174
2175 /* no need to be strict, transport_set_option() will validate it again */
2176 if (depth && atoi(depth) < 1)
2177 die(_("depth %s is not a positive number"), depth);
2178 if (depth || deepen_since || deepen_not.nr)
2179 deepen = 1;
2180
2181 /* FETCH_HEAD never gets updated in --dry-run mode */
2182 if (dry_run)
2183 write_fetch_head = 0;
2184
2185 if (all) {
2186 if (argc == 1)
2187 die(_("fetch --all does not take a repository argument"));
2188 else if (argc > 1)
2189 die(_("fetch --all does not make sense with refspecs"));
2190 (void) for_each_remote(get_one_remote_for_fetch, &list);
2191
2192 /* do not do fetch_multiple() of one */
2193 if (list.nr == 1)
2194 remote = remote_get(list.items[0].string);
2195 } else if (argc == 0) {
2196 /* No arguments -- use default remote */
2197 remote = remote_get(NULL);
2198 } else if (multiple) {
2199 /* All arguments are assumed to be remotes or groups */
2200 for (i = 0; i < argc; i++)
2201 if (!add_remote_or_group(argv[i], &list))
2202 die(_("no such remote or remote group: %s"),
2203 argv[i]);
2204 } else {
2205 /* Single remote or group */
2206 (void) add_remote_or_group(argv[0], &list);
2207 if (list.nr > 1) {
2208 /* More than one remote */
2209 if (argc > 1)
2210 die(_("fetching a group and specifying refspecs does not make sense"));
2211 } else {
2212 /* Zero or one remotes */
2213 remote = remote_get(argv[0]);
2214 prune_tags_ok = (argc == 1);
2215 argc--;
2216 argv++;
2217 }
2218 }
2219
2220 if (negotiate_only) {
2221 struct oidset acked_commits = OIDSET_INIT;
2222 struct oidset_iter iter;
2223 const struct object_id *oid;
2224
2225 if (!remote)
2226 die(_("must supply remote when using --negotiate-only"));
2227 gtransport = prepare_transport(remote, 1);
2228 if (gtransport->smart_options) {
2229 gtransport->smart_options->acked_commits = &acked_commits;
2230 } else {
2231 warning(_("protocol does not support --negotiate-only, exiting"));
2232 result = 1;
2233 goto cleanup;
2234 }
2235 if (server_options.nr)
2236 gtransport->server_options = &server_options;
2237 result = transport_fetch_refs(gtransport, NULL);
2238
2239 oidset_iter_init(&acked_commits, &iter);
2240 while ((oid = oidset_iter_next(&iter)))
2241 printf("%s\n", oid_to_hex(oid));
2242 oidset_clear(&acked_commits);
2243 } else if (remote) {
2244 if (filter_options.choice || has_promisor_remote())
2245 fetch_one_setup_partial(remote);
2246 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
2247 } else {
2248 int max_children = max_jobs;
2249
2250 if (filter_options.choice)
2251 die(_("--filter can only be used with the remote "
2252 "configured in extensions.partialclone"));
2253
2254 if (atomic_fetch)
2255 die(_("--atomic can only be used when fetching "
2256 "from one remote"));
2257
2258 if (stdin_refspecs)
2259 die(_("--stdin can only be used when fetching "
2260 "from one remote"));
2261
2262 if (max_children < 0)
2263 max_children = fetch_parallel_config;
2264
2265 /* TODO should this also die if we have a previous partial-clone? */
2266 result = fetch_multiple(&list, max_children);
2267 }
2268
2269
2270 /*
2271 * This is only needed after fetch_one(), which does not fetch
2272 * submodules by itself.
2273 *
2274 * When we fetch from multiple remotes, fetch_multiple() has
2275 * already updated submodules to grab commits necessary for
2276 * the fetched history from each remote, so there is no need
2277 * to fetch submodules from here.
2278 */
2279 if (!result && remote && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
2280 struct strvec options = STRVEC_INIT;
2281 int max_children = max_jobs;
2282
2283 if (max_children < 0)
2284 max_children = submodule_fetch_jobs_config;
2285 if (max_children < 0)
2286 max_children = fetch_parallel_config;
2287
2288 add_options_to_argv(&options);
2289 result = fetch_submodules(the_repository,
2290 &options,
2291 submodule_prefix,
2292 recurse_submodules,
2293 recurse_submodules_default,
2294 verbosity < 0,
2295 max_children);
2296 strvec_clear(&options);
2297 }
2298
2299 /*
2300 * Skip irrelevant tasks because we know objects were not
2301 * fetched.
2302 *
2303 * NEEDSWORK: as a future optimization, we can return early
2304 * whenever objects were not fetched e.g. if we already have all
2305 * of them.
2306 */
2307 if (negotiate_only)
2308 goto cleanup;
2309
2310 prepare_repo_settings(the_repository);
2311 if (fetch_write_commit_graph > 0 ||
2312 (fetch_write_commit_graph < 0 &&
2313 the_repository->settings.fetch_write_commit_graph)) {
2314 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
2315
2316 if (progress)
2317 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
2318
2319 write_commit_graph_reachable(the_repository->objects->odb,
2320 commit_graph_flags,
2321 NULL);
2322 }
2323
2324 if (enable_auto_gc) {
2325 if (refetch) {
2326 /*
2327 * Hint auto-maintenance strongly to encourage repacking,
2328 * but respect config settings disabling it.
2329 */
2330 int opt_val;
2331 if (git_config_get_int("gc.autopacklimit", &opt_val))
2332 opt_val = -1;
2333 if (opt_val != 0)
2334 git_config_push_parameter("gc.autoPackLimit=1");
2335
2336 if (git_config_get_int("maintenance.incremental-repack.auto", &opt_val))
2337 opt_val = -1;
2338 if (opt_val != 0)
2339 git_config_push_parameter("maintenance.incremental-repack.auto=-1");
2340 }
2341 run_auto_maintenance(verbosity < 0);
2342 }
2343
2344 cleanup:
2345 string_list_clear(&list, 0);
2346 return result;
2347 }
git for Debian