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fetch: centralize logic to print remote URL
[git/gitster.git] / builtin / fetch.c
blob1e3599cb74c913be88c3bd0cc3e0a593805d962a
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 #include "bundle-uri.h"
33
34 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
35
36 static const char * const builtin_fetch_usage[] = {
37 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
38 N_("git fetch [<options>] <group>"),
39 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
40 N_("git fetch --all [<options>]"),
41 NULL
42 };
43
44 enum {
45 TAGS_UNSET = 0,
46 TAGS_DEFAULT = 1,
47 TAGS_SET = 2
48 };
49
50 struct display_state {
51 int refcol_width;
52 int compact_format;
53
54 char *url;
55 int url_len, shown_url;
56 };
57
58 static int fetch_prune_config = -1; /* unspecified */
59 static int fetch_show_forced_updates = 1;
60 static uint64_t forced_updates_ms = 0;
61 static int prefetch = 0;
62 static int prune = -1; /* unspecified */
63 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
64
65 static int fetch_prune_tags_config = -1; /* unspecified */
66 static int prune_tags = -1; /* unspecified */
67 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
68
69 static int all, append, dry_run, force, keep, multiple, update_head_ok;
70 static int write_fetch_head = 1;
71 static int verbosity, deepen_relative, set_upstream, refetch;
72 static int progress = -1;
73 static int enable_auto_gc = 1;
74 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
75 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
76 static int fetch_parallel_config = 1;
77 static int atomic_fetch;
78 static enum transport_family family;
79 static const char *depth;
80 static const char *deepen_since;
81 static const char *upload_pack;
82 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
83 static struct strbuf default_rla = STRBUF_INIT;
84 static struct transport *gtransport;
85 static struct transport *gsecondary;
86 static const char *submodule_prefix = "";
87 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
88 static int recurse_submodules_cli = RECURSE_SUBMODULES_DEFAULT;
89 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
90 static struct refspec refmap = REFSPEC_INIT_FETCH;
91 static struct list_objects_filter_options filter_options = LIST_OBJECTS_FILTER_INIT;
92 static struct string_list server_options = STRING_LIST_INIT_DUP;
93 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
94 static int fetch_write_commit_graph = -1;
95 static int stdin_refspecs = 0;
96 static int negotiate_only;
97
98 static int git_fetch_config(const char *k, const char *v, void *cb)
99 {
100 if (!strcmp(k, "fetch.prune")) {
101 fetch_prune_config = git_config_bool(k, v);
102 return 0;
103 }
104
105 if (!strcmp(k, "fetch.prunetags")) {
106 fetch_prune_tags_config = git_config_bool(k, v);
107 return 0;
108 }
109
110 if (!strcmp(k, "fetch.showforcedupdates")) {
111 fetch_show_forced_updates = git_config_bool(k, v);
112 return 0;
113 }
114
115 if (!strcmp(k, "submodule.recurse")) {
116 int r = git_config_bool(k, v) ?
117 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
118 recurse_submodules = r;
119 }
120
121 if (!strcmp(k, "submodule.fetchjobs")) {
122 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
123 return 0;
124 } else if (!strcmp(k, "fetch.recursesubmodules")) {
125 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
126 return 0;
127 }
128
129 if (!strcmp(k, "fetch.parallel")) {
130 fetch_parallel_config = git_config_int(k, v);
131 if (fetch_parallel_config < 0)
132 die(_("fetch.parallel cannot be negative"));
133 if (!fetch_parallel_config)
134 fetch_parallel_config = online_cpus();
135 return 0;
136 }
137
138 return git_default_config(k, v, cb);
139 }
140
141 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
142 {
143 BUG_ON_OPT_NEG(unset);
144
145 /*
146 * "git fetch --refmap='' origin foo"
147 * can be used to tell the command not to store anywhere
148 */
149 refspec_append(&refmap, arg);
150
151 return 0;
152 }
153
154 static struct option builtin_fetch_options[] = {
155 OPT__VERBOSITY(&verbosity),
156 OPT_BOOL(0, "all", &all,
157 N_("fetch from all remotes")),
158 OPT_BOOL(0, "set-upstream", &set_upstream,
159 N_("set upstream for git pull/fetch")),
160 OPT_BOOL('a', "append", &append,
161 N_("append to .git/FETCH_HEAD instead of overwriting")),
162 OPT_BOOL(0, "atomic", &atomic_fetch,
163 N_("use atomic transaction to update references")),
164 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
165 N_("path to upload pack on remote end")),
166 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
167 OPT_BOOL('m', "multiple", &multiple,
168 N_("fetch from multiple remotes")),
169 OPT_SET_INT('t', "tags", &tags,
170 N_("fetch all tags and associated objects"), TAGS_SET),
171 OPT_SET_INT('n', NULL, &tags,
172 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
173 OPT_INTEGER('j', "jobs", &max_jobs,
174 N_("number of submodules fetched in parallel")),
175 OPT_BOOL(0, "prefetch", &prefetch,
176 N_("modify the refspec to place all refs within refs/prefetch/")),
177 OPT_BOOL('p', "prune", &prune,
178 N_("prune remote-tracking branches no longer on remote")),
179 OPT_BOOL('P', "prune-tags", &prune_tags,
180 N_("prune local tags no longer on remote and clobber changed tags")),
181 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules_cli, N_("on-demand"),
182 N_("control recursive fetching of submodules"),
183 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
184 OPT_BOOL(0, "dry-run", &dry_run,
185 N_("dry run")),
186 OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
187 N_("write fetched references to the FETCH_HEAD file")),
188 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
189 OPT_BOOL('u', "update-head-ok", &update_head_ok,
190 N_("allow updating of HEAD ref")),
191 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
192 OPT_STRING(0, "depth", &depth, N_("depth"),
193 N_("deepen history of shallow clone")),
194 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
195 N_("deepen history of shallow repository based on time")),
196 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
197 N_("deepen history of shallow clone, excluding rev")),
198 OPT_INTEGER(0, "deepen", &deepen_relative,
199 N_("deepen history of shallow clone")),
200 OPT_SET_INT_F(0, "unshallow", &unshallow,
201 N_("convert to a complete repository"),
202 1, PARSE_OPT_NONEG),
203 OPT_SET_INT_F(0, "refetch", &refetch,
204 N_("re-fetch without negotiating common commits"),
205 1, PARSE_OPT_NONEG),
206 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
207 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
208 OPT_CALLBACK_F(0, "recurse-submodules-default",
209 &recurse_submodules_default, N_("on-demand"),
210 N_("default for recursive fetching of submodules "
211 "(lower priority than config files)"),
212 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
213 OPT_BOOL(0, "update-shallow", &update_shallow,
214 N_("accept refs that update .git/shallow")),
215 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
216 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
217 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
218 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
219 TRANSPORT_FAMILY_IPV4),
220 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
221 TRANSPORT_FAMILY_IPV6),
222 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
223 N_("report that we have only objects reachable from this object")),
224 OPT_BOOL(0, "negotiate-only", &negotiate_only,
225 N_("do not fetch a packfile; instead, print ancestors of negotiation tips")),
226 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
227 OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
228 N_("run 'maintenance --auto' after fetching")),
229 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
230 N_("run 'maintenance --auto' after fetching")),
231 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
232 N_("check for forced-updates on all updated branches")),
233 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
234 N_("write the commit-graph after fetching")),
235 OPT_BOOL(0, "stdin", &stdin_refspecs,
236 N_("accept refspecs from stdin")),
237 OPT_END()
238 };
239
240 static void unlock_pack(unsigned int flags)
241 {
242 if (gtransport)
243 transport_unlock_pack(gtransport, flags);
244 if (gsecondary)
245 transport_unlock_pack(gsecondary, flags);
246 }
247
248 static void unlock_pack_atexit(void)
249 {
250 unlock_pack(0);
251 }
252
253 static void unlock_pack_on_signal(int signo)
254 {
255 unlock_pack(TRANSPORT_UNLOCK_PACK_IN_SIGNAL_HANDLER);
256 sigchain_pop(signo);
257 raise(signo);
258 }
259
260 static void add_merge_config(struct ref **head,
261 const struct ref *remote_refs,
262 struct branch *branch,
263 struct ref ***tail)
264 {
265 int i;
266
267 for (i = 0; i < branch->merge_nr; i++) {
268 struct ref *rm, **old_tail = *tail;
269 struct refspec_item refspec;
270
271 for (rm = *head; rm; rm = rm->next) {
272 if (branch_merge_matches(branch, i, rm->name)) {
273 rm->fetch_head_status = FETCH_HEAD_MERGE;
274 break;
275 }
276 }
277 if (rm)
278 continue;
279
280 /*
281 * Not fetched to a remote-tracking branch? We need to fetch
282 * it anyway to allow this branch's "branch.$name.merge"
283 * to be honored by 'git pull', but we do not have to
284 * fail if branch.$name.merge is misconfigured to point
285 * at a nonexisting branch. If we were indeed called by
286 * 'git pull', it will notice the misconfiguration because
287 * there is no entry in the resulting FETCH_HEAD marked
288 * for merging.
289 */
290 memset(&refspec, 0, sizeof(refspec));
291 refspec.src = branch->merge[i]->src;
292 get_fetch_map(remote_refs, &refspec, tail, 1);
293 for (rm = *old_tail; rm; rm = rm->next)
294 rm->fetch_head_status = FETCH_HEAD_MERGE;
295 }
296 }
297
298 static void create_fetch_oidset(struct ref **head, struct oidset *out)
299 {
300 struct ref *rm = *head;
301 while (rm) {
302 oidset_insert(out, &rm->old_oid);
303 rm = rm->next;
304 }
305 }
306
307 struct refname_hash_entry {
308 struct hashmap_entry ent;
309 struct object_id oid;
310 int ignore;
311 char refname[FLEX_ARRAY];
312 };
313
314 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data UNUSED,
315 const struct hashmap_entry *eptr,
316 const struct hashmap_entry *entry_or_key,
317 const void *keydata)
318 {
319 const struct refname_hash_entry *e1, *e2;
320
321 e1 = container_of(eptr, const struct refname_hash_entry, ent);
322 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
323 return strcmp(e1->refname, keydata ? keydata : e2->refname);
324 }
325
326 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
327 const char *refname,
328 const struct object_id *oid)
329 {
330 struct refname_hash_entry *ent;
331 size_t len = strlen(refname);
332
333 FLEX_ALLOC_MEM(ent, refname, refname, len);
334 hashmap_entry_init(&ent->ent, strhash(refname));
335 oidcpy(&ent->oid, oid);
336 hashmap_add(map, &ent->ent);
337 return ent;
338 }
339
340 static int add_one_refname(const char *refname,
341 const struct object_id *oid,
342 int flag UNUSED, void *cbdata)
343 {
344 struct hashmap *refname_map = cbdata;
345
346 (void) refname_hash_add(refname_map, refname, oid);
347 return 0;
348 }
349
350 static void refname_hash_init(struct hashmap *map)
351 {
352 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
353 }
354
355 static int refname_hash_exists(struct hashmap *map, const char *refname)
356 {
357 return !!hashmap_get_from_hash(map, strhash(refname), refname);
358 }
359
360 static void clear_item(struct refname_hash_entry *item)
361 {
362 item->ignore = 1;
363 }
364
365
366 static void add_already_queued_tags(const char *refname,
367 const struct object_id *old_oid,
368 const struct object_id *new_oid,
369 void *cb_data)
370 {
371 struct hashmap *queued_tags = cb_data;
372 if (starts_with(refname, "refs/tags/") && new_oid)
373 (void) refname_hash_add(queued_tags, refname, new_oid);
374 }
375
376 static void find_non_local_tags(const struct ref *refs,
377 struct ref_transaction *transaction,
378 struct ref **head,
379 struct ref ***tail)
380 {
381 struct hashmap existing_refs;
382 struct hashmap remote_refs;
383 struct oidset fetch_oids = OIDSET_INIT;
384 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
385 struct string_list_item *remote_ref_item;
386 const struct ref *ref;
387 struct refname_hash_entry *item = NULL;
388 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
389
390 refname_hash_init(&existing_refs);
391 refname_hash_init(&remote_refs);
392 create_fetch_oidset(head, &fetch_oids);
393
394 for_each_ref(add_one_refname, &existing_refs);
395
396 /*
397 * If we already have a transaction, then we need to filter out all
398 * tags which have already been queued up.
399 */
400 if (transaction)
401 ref_transaction_for_each_queued_update(transaction,
402 add_already_queued_tags,
403 &existing_refs);
404
405 for (ref = refs; ref; ref = ref->next) {
406 if (!starts_with(ref->name, "refs/tags/"))
407 continue;
408
409 /*
410 * The peeled ref always follows the matching base
411 * ref, so if we see a peeled ref that we don't want
412 * to fetch then we can mark the ref entry in the list
413 * as one to ignore by setting util to NULL.
414 */
415 if (ends_with(ref->name, "^{}")) {
416 if (item &&
417 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
418 !oidset_contains(&fetch_oids, &ref->old_oid) &&
419 !has_object_file_with_flags(&item->oid, quick_flags) &&
420 !oidset_contains(&fetch_oids, &item->oid))
421 clear_item(item);
422 item = NULL;
423 continue;
424 }
425
426 /*
427 * If item is non-NULL here, then we previously saw a
428 * ref not followed by a peeled reference, so we need
429 * to check if it is a lightweight tag that we want to
430 * fetch.
431 */
432 if (item &&
433 !has_object_file_with_flags(&item->oid, quick_flags) &&
434 !oidset_contains(&fetch_oids, &item->oid))
435 clear_item(item);
436
437 item = NULL;
438
439 /* skip duplicates and refs that we already have */
440 if (refname_hash_exists(&remote_refs, ref->name) ||
441 refname_hash_exists(&existing_refs, ref->name))
442 continue;
443
444 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
445 string_list_insert(&remote_refs_list, ref->name);
446 }
447 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
448
449 /*
450 * We may have a final lightweight tag that needs to be
451 * checked to see if it needs fetching.
452 */
453 if (item &&
454 !has_object_file_with_flags(&item->oid, quick_flags) &&
455 !oidset_contains(&fetch_oids, &item->oid))
456 clear_item(item);
457
458 /*
459 * For all the tags in the remote_refs_list,
460 * add them to the list of refs to be fetched
461 */
462 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
463 const char *refname = remote_ref_item->string;
464 struct ref *rm;
465 unsigned int hash = strhash(refname);
466
467 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
468 struct refname_hash_entry, ent);
469 if (!item)
470 BUG("unseen remote ref?");
471
472 /* Unless we have already decided to ignore this item... */
473 if (item->ignore)
474 continue;
475
476 rm = alloc_ref(item->refname);
477 rm->peer_ref = alloc_ref(item->refname);
478 oidcpy(&rm->old_oid, &item->oid);
479 **tail = rm;
480 *tail = &rm->next;
481 }
482 hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
483 string_list_clear(&remote_refs_list, 0);
484 oidset_clear(&fetch_oids);
485 }
486
487 static void filter_prefetch_refspec(struct refspec *rs)
488 {
489 int i;
490
491 if (!prefetch)
492 return;
493
494 for (i = 0; i < rs->nr; i++) {
495 struct strbuf new_dst = STRBUF_INIT;
496 char *old_dst;
497 const char *sub = NULL;
498
499 if (rs->items[i].negative)
500 continue;
501 if (!rs->items[i].dst ||
502 (rs->items[i].src &&
503 !strncmp(rs->items[i].src,
504 ref_namespace[NAMESPACE_TAGS].ref,
505 strlen(ref_namespace[NAMESPACE_TAGS].ref)))) {
506 int j;
507
508 free(rs->items[i].src);
509 free(rs->items[i].dst);
510
511 for (j = i + 1; j < rs->nr; j++) {
512 rs->items[j - 1] = rs->items[j];
513 rs->raw[j - 1] = rs->raw[j];
514 }
515 rs->nr--;
516 i--;
517 continue;
518 }
519
520 old_dst = rs->items[i].dst;
521 strbuf_addstr(&new_dst, ref_namespace[NAMESPACE_PREFETCH].ref);
522
523 /*
524 * If old_dst starts with "refs/", then place
525 * sub after that prefix. Otherwise, start at
526 * the beginning of the string.
527 */
528 if (!skip_prefix(old_dst, "refs/", &sub))
529 sub = old_dst;
530 strbuf_addstr(&new_dst, sub);
531
532 rs->items[i].dst = strbuf_detach(&new_dst, NULL);
533 rs->items[i].force = 1;
534
535 free(old_dst);
536 }
537 }
538
539 static struct ref *get_ref_map(struct remote *remote,
540 const struct ref *remote_refs,
541 struct refspec *rs,
542 int tags, int *autotags)
543 {
544 int i;
545 struct ref *rm;
546 struct ref *ref_map = NULL;
547 struct ref **tail = &ref_map;
548
549 /* opportunistically-updated references: */
550 struct ref *orefs = NULL, **oref_tail = &orefs;
551
552 struct hashmap existing_refs;
553 int existing_refs_populated = 0;
554
555 filter_prefetch_refspec(rs);
556 if (remote)
557 filter_prefetch_refspec(&remote->fetch);
558
559 if (rs->nr) {
560 struct refspec *fetch_refspec;
561
562 for (i = 0; i < rs->nr; i++) {
563 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
564 if (rs->items[i].dst && rs->items[i].dst[0])
565 *autotags = 1;
566 }
567 /* Merge everything on the command line (but not --tags) */
568 for (rm = ref_map; rm; rm = rm->next)
569 rm->fetch_head_status = FETCH_HEAD_MERGE;
570
571 /*
572 * For any refs that we happen to be fetching via
573 * command-line arguments, the destination ref might
574 * have been missing or have been different than the
575 * remote-tracking ref that would be derived from the
576 * configured refspec. In these cases, we want to
577 * take the opportunity to update their configured
578 * remote-tracking reference. However, we do not want
579 * to mention these entries in FETCH_HEAD at all, as
580 * they would simply be duplicates of existing
581 * entries, so we set them FETCH_HEAD_IGNORE below.
582 *
583 * We compute these entries now, based only on the
584 * refspecs specified on the command line. But we add
585 * them to the list following the refspecs resulting
586 * from the tags option so that one of the latter,
587 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
588 * by ref_remove_duplicates() in favor of one of these
589 * opportunistic entries with FETCH_HEAD_IGNORE.
590 */
591 if (refmap.nr)
592 fetch_refspec = &refmap;
593 else
594 fetch_refspec = &remote->fetch;
595
596 for (i = 0; i < fetch_refspec->nr; i++)
597 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
598 } else if (refmap.nr) {
599 die("--refmap option is only meaningful with command-line refspec(s)");
600 } else {
601 /* Use the defaults */
602 struct branch *branch = branch_get(NULL);
603 int has_merge = branch_has_merge_config(branch);
604 if (remote &&
605 (remote->fetch.nr ||
606 /* Note: has_merge implies non-NULL branch->remote_name */
607 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
608 for (i = 0; i < remote->fetch.nr; i++) {
609 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
610 if (remote->fetch.items[i].dst &&
611 remote->fetch.items[i].dst[0])
612 *autotags = 1;
613 if (!i && !has_merge && ref_map &&
614 !remote->fetch.items[0].pattern)
615 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
616 }
617 /*
618 * if the remote we're fetching from is the same
619 * as given in branch.<name>.remote, we add the
620 * ref given in branch.<name>.merge, too.
621 *
622 * Note: has_merge implies non-NULL branch->remote_name
623 */
624 if (has_merge &&
625 !strcmp(branch->remote_name, remote->name))
626 add_merge_config(&ref_map, remote_refs, branch, &tail);
627 } else if (!prefetch) {
628 ref_map = get_remote_ref(remote_refs, "HEAD");
629 if (!ref_map)
630 die(_("couldn't find remote ref HEAD"));
631 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
632 tail = &ref_map->next;
633 }
634 }
635
636 if (tags == TAGS_SET)
637 /* also fetch all tags */
638 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
639 else if (tags == TAGS_DEFAULT && *autotags)
640 find_non_local_tags(remote_refs, NULL, &ref_map, &tail);
641
642 /* Now append any refs to be updated opportunistically: */
643 *tail = orefs;
644 for (rm = orefs; rm; rm = rm->next) {
645 rm->fetch_head_status = FETCH_HEAD_IGNORE;
646 tail = &rm->next;
647 }
648
649 /*
650 * apply negative refspecs first, before we remove duplicates. This is
651 * necessary as negative refspecs might remove an otherwise conflicting
652 * duplicate.
653 */
654 if (rs->nr)
655 ref_map = apply_negative_refspecs(ref_map, rs);
656 else
657 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
658
659 ref_map = ref_remove_duplicates(ref_map);
660
661 for (rm = ref_map; rm; rm = rm->next) {
662 if (rm->peer_ref) {
663 const char *refname = rm->peer_ref->name;
664 struct refname_hash_entry *peer_item;
665 unsigned int hash = strhash(refname);
666
667 if (!existing_refs_populated) {
668 refname_hash_init(&existing_refs);
669 for_each_ref(add_one_refname, &existing_refs);
670 existing_refs_populated = 1;
671 }
672
673 peer_item = hashmap_get_entry_from_hash(&existing_refs,
674 hash, refname,
675 struct refname_hash_entry, ent);
676 if (peer_item) {
677 struct object_id *old_oid = &peer_item->oid;
678 oidcpy(&rm->peer_ref->old_oid, old_oid);
679 }
680 }
681 }
682 if (existing_refs_populated)
683 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
684
685 return ref_map;
686 }
687
688 #define STORE_REF_ERROR_OTHER 1
689 #define STORE_REF_ERROR_DF_CONFLICT 2
690
691 static int s_update_ref(const char *action,
692 struct ref *ref,
693 struct ref_transaction *transaction,
694 int check_old)
695 {
696 char *msg;
697 char *rla = getenv("GIT_REFLOG_ACTION");
698 struct ref_transaction *our_transaction = NULL;
699 struct strbuf err = STRBUF_INIT;
700 int ret;
701
702 if (dry_run)
703 return 0;
704 if (!rla)
705 rla = default_rla.buf;
706 msg = xstrfmt("%s: %s", rla, action);
707
708 /*
709 * If no transaction was passed to us, we manage the transaction
710 * ourselves. Otherwise, we trust the caller to handle the transaction
711 * lifecycle.
712 */
713 if (!transaction) {
714 transaction = our_transaction = ref_transaction_begin(&err);
715 if (!transaction) {
716 ret = STORE_REF_ERROR_OTHER;
717 goto out;
718 }
719 }
720
721 ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
722 check_old ? &ref->old_oid : NULL,
723 0, msg, &err);
724 if (ret) {
725 ret = STORE_REF_ERROR_OTHER;
726 goto out;
727 }
728
729 if (our_transaction) {
730 switch (ref_transaction_commit(our_transaction, &err)) {
731 case 0:
732 break;
733 case TRANSACTION_NAME_CONFLICT:
734 ret = STORE_REF_ERROR_DF_CONFLICT;
735 goto out;
736 default:
737 ret = STORE_REF_ERROR_OTHER;
738 goto out;
739 }
740 }
741
742 out:
743 ref_transaction_free(our_transaction);
744 if (ret)
745 error("%s", err.buf);
746 strbuf_release(&err);
747 free(msg);
748 return ret;
749 }
750
751 static int refcol_width(const struct ref *ref, int compact_format)
752 {
753 int max, rlen, llen, len;
754
755 /* uptodate lines are only shown on high verbosity level */
756 if (verbosity <= 0 && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
757 return 0;
758
759 max = term_columns();
760 rlen = utf8_strwidth(prettify_refname(ref->name));
761
762 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
763
764 /*
765 * rough estimation to see if the output line is too long and
766 * should not be counted (we can't do precise calculation
767 * anyway because we don't know if the error explanation part
768 * will be printed in update_local_ref)
769 */
770 if (compact_format) {
771 llen = 0;
772 max = max * 2 / 3;
773 }
774 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
775 if (len >= max)
776 return 0;
777
778 return rlen;
779 }
780
781 static void display_state_init(struct display_state *display_state, struct ref *ref_map,
782 const char *raw_url)
783 {
784 struct ref *rm;
785 const char *format = "full";
786 int i;
787
788 memset(display_state, 0, sizeof(*display_state));
789
790 if (raw_url)
791 display_state->url = transport_anonymize_url(raw_url);
792 else
793 display_state->url = xstrdup("foreign");
794
795 display_state->url_len = strlen(display_state->url);
796 for (i = display_state->url_len - 1; display_state->url[i] == '/' && 0 <= i; i--)
797 ;
798 display_state->url_len = i + 1;
799 if (4 < i && !strncmp(".git", display_state->url + i - 3, 4))
800 display_state->url_len = i - 3;
801
802 if (verbosity < 0)
803 return;
804
805 git_config_get_string_tmp("fetch.output", &format);
806 if (!strcasecmp(format, "full"))
807 display_state->compact_format = 0;
808 else if (!strcasecmp(format, "compact"))
809 display_state->compact_format = 1;
810 else
811 die(_("invalid value for '%s': '%s'"),
812 "fetch.output", format);
813
814 display_state->refcol_width = 10;
815 for (rm = ref_map; rm; rm = rm->next) {
816 int width;
817
818 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
819 !rm->peer_ref ||
820 !strcmp(rm->name, "HEAD"))
821 continue;
822
823 width = refcol_width(rm, display_state->compact_format);
824
825 /*
826 * Not precise calculation for compact mode because '*' can
827 * appear on the left hand side of '->' and shrink the column
828 * back.
829 */
830 if (display_state->refcol_width < width)
831 display_state->refcol_width = width;
832 }
833 }
834
835 static void display_state_release(struct display_state *display_state)
836 {
837 free(display_state->url);
838 }
839
840 static void print_remote_to_local(struct display_state *display_state,
841 struct strbuf *display_buffer,
842 const char *remote, const char *local)
843 {
844 strbuf_addf(display_buffer, "%-*s -> %s", display_state->refcol_width, remote, local);
845 }
846
847 static int find_and_replace(struct strbuf *haystack,
848 const char *needle,
849 const char *placeholder)
850 {
851 const char *p = NULL;
852 int plen, nlen;
853
854 nlen = strlen(needle);
855 if (ends_with(haystack->buf, needle))
856 p = haystack->buf + haystack->len - nlen;
857 else
858 p = strstr(haystack->buf, needle);
859 if (!p)
860 return 0;
861
862 if (p > haystack->buf && p[-1] != '/')
863 return 0;
864
865 plen = strlen(p);
866 if (plen > nlen && p[nlen] != '/')
867 return 0;
868
869 strbuf_splice(haystack, p - haystack->buf, nlen,
870 placeholder, strlen(placeholder));
871 return 1;
872 }
873
874 static void print_compact(struct display_state *display_state, struct strbuf *display_buffer,
875 const char *remote, const char *local)
876 {
877 struct strbuf r = STRBUF_INIT;
878 struct strbuf l = STRBUF_INIT;
879
880 if (!strcmp(remote, local)) {
881 strbuf_addf(display_buffer, "%-*s -> *", display_state->refcol_width, remote);
882 return;
883 }
884
885 strbuf_addstr(&r, remote);
886 strbuf_addstr(&l, local);
887
888 if (!find_and_replace(&r, local, "*"))
889 find_and_replace(&l, remote, "*");
890 print_remote_to_local(display_state, display_buffer, r.buf, l.buf);
891
892 strbuf_release(&r);
893 strbuf_release(&l);
894 }
895
896 static void format_display(struct display_state *display_state,
897 struct strbuf *display_buffer, char code,
898 const char *summary, const char *error,
899 const char *remote, const char *local,
900 int summary_width)
901 {
902 int width;
903
904 if (verbosity < 0)
905 return;
906
907 if (!display_state->shown_url) {
908 strbuf_addf(display_buffer, _("From %.*s\n"),
909 display_state->url_len, display_state->url);
910 display_state->shown_url = 1;
911 }
912
913 width = (summary_width + strlen(summary) - gettext_width(summary));
914
915 strbuf_addf(display_buffer, " %c %-*s ", code, width, summary);
916 if (!display_state->compact_format)
917 print_remote_to_local(display_state, display_buffer, remote, prettify_refname(local));
918 else
919 print_compact(display_state, display_buffer, remote, prettify_refname(local));
920 if (error)
921 strbuf_addf(display_buffer, " (%s)", error);
922 strbuf_addch(display_buffer, '\n');
923 }
924
925 static int update_local_ref(struct ref *ref,
926 struct ref_transaction *transaction,
927 struct display_state *display_state,
928 const char *remote, const struct ref *remote_ref,
929 struct strbuf *display, int summary_width)
930 {
931 struct commit *current = NULL, *updated;
932 int fast_forward = 0;
933
934 if (!repo_has_object_file(the_repository, &ref->new_oid))
935 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
936
937 if (oideq(&ref->old_oid, &ref->new_oid)) {
938 if (verbosity > 0)
939 format_display(display_state, display, '=', _("[up to date]"), NULL,
940 remote, ref->name, summary_width);
941 return 0;
942 }
943
944 if (!update_head_ok &&
945 !is_null_oid(&ref->old_oid) &&
946 branch_checked_out(ref->name)) {
947 /*
948 * If this is the head, and it's not okay to update
949 * the head, and the old value of the head isn't empty...
950 */
951 format_display(display_state, display, '!', _("[rejected]"),
952 _("can't fetch into checked-out branch"),
953 remote, ref->name, summary_width);
954 return 1;
955 }
956
957 if (!is_null_oid(&ref->old_oid) &&
958 starts_with(ref->name, "refs/tags/")) {
959 if (force || ref->force) {
960 int r;
961 r = s_update_ref("updating tag", ref, transaction, 0);
962 format_display(display_state, display, r ? '!' : 't', _("[tag update]"),
963 r ? _("unable to update local ref") : NULL,
964 remote, ref->name, summary_width);
965 return r;
966 } else {
967 format_display(display_state, display, '!', _("[rejected]"),
968 _("would clobber existing tag"),
969 remote, ref->name, summary_width);
970 return 1;
971 }
972 }
973
974 current = lookup_commit_reference_gently(the_repository,
975 &ref->old_oid, 1);
976 updated = lookup_commit_reference_gently(the_repository,
977 &ref->new_oid, 1);
978 if (!current || !updated) {
979 const char *msg;
980 const char *what;
981 int r;
982 /*
983 * Nicely describe the new ref we're fetching.
984 * Base this on the remote's ref name, as it's
985 * more likely to follow a standard layout.
986 */
987 const char *name = remote_ref ? remote_ref->name : "";
988 if (starts_with(name, "refs/tags/")) {
989 msg = "storing tag";
990 what = _("[new tag]");
991 } else if (starts_with(name, "refs/heads/")) {
992 msg = "storing head";
993 what = _("[new branch]");
994 } else {
995 msg = "storing ref";
996 what = _("[new ref]");
997 }
998
999 r = s_update_ref(msg, ref, transaction, 0);
1000 format_display(display_state, display, r ? '!' : '*', what,
1001 r ? _("unable to update local ref") : NULL,
1002 remote, ref->name, summary_width);
1003 return r;
1004 }
1005
1006 if (fetch_show_forced_updates) {
1007 uint64_t t_before = getnanotime();
1008 fast_forward = in_merge_bases(current, updated);
1009 forced_updates_ms += (getnanotime() - t_before) / 1000000;
1010 } else {
1011 fast_forward = 1;
1012 }
1013
1014 if (fast_forward) {
1015 struct strbuf quickref = STRBUF_INIT;
1016 int r;
1017
1018 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
1019 strbuf_addstr(&quickref, "..");
1020 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
1021 r = s_update_ref("fast-forward", ref, transaction, 1);
1022 format_display(display_state, display, r ? '!' : ' ', quickref.buf,
1023 r ? _("unable to update local ref") : NULL,
1024 remote, ref->name, summary_width);
1025 strbuf_release(&quickref);
1026 return r;
1027 } else if (force || ref->force) {
1028 struct strbuf quickref = STRBUF_INIT;
1029 int r;
1030 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
1031 strbuf_addstr(&quickref, "...");
1032 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
1033 r = s_update_ref("forced-update", ref, transaction, 1);
1034 format_display(display_state, display, r ? '!' : '+', quickref.buf,
1035 r ? _("unable to update local ref") : _("forced update"),
1036 remote, ref->name, summary_width);
1037 strbuf_release(&quickref);
1038 return r;
1039 } else {
1040 format_display(display_state, display, '!', _("[rejected]"), _("non-fast-forward"),
1041 remote, ref->name, summary_width);
1042 return 1;
1043 }
1044 }
1045
1046 static const struct object_id *iterate_ref_map(void *cb_data)
1047 {
1048 struct ref **rm = cb_data;
1049 struct ref *ref = *rm;
1050
1051 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
1052 ref = ref->next;
1053 if (!ref)
1054 return NULL;
1055 *rm = ref->next;
1056 return &ref->old_oid;
1057 }
1058
1059 struct fetch_head {
1060 FILE *fp;
1061 struct strbuf buf;
1062 };
1063
1064 static int open_fetch_head(struct fetch_head *fetch_head)
1065 {
1066 const char *filename = git_path_fetch_head(the_repository);
1067
1068 if (write_fetch_head) {
1069 fetch_head->fp = fopen(filename, "a");
1070 if (!fetch_head->fp)
1071 return error_errno(_("cannot open '%s'"), filename);
1072 strbuf_init(&fetch_head->buf, 0);
1073 } else {
1074 fetch_head->fp = NULL;
1075 }
1076
1077 return 0;
1078 }
1079
1080 static void append_fetch_head(struct fetch_head *fetch_head,
1081 const struct object_id *old_oid,
1082 enum fetch_head_status fetch_head_status,
1083 const char *note,
1084 const char *url, size_t url_len)
1085 {
1086 char old_oid_hex[GIT_MAX_HEXSZ + 1];
1087 const char *merge_status_marker;
1088 size_t i;
1089
1090 if (!fetch_head->fp)
1091 return;
1092
1093 switch (fetch_head_status) {
1094 case FETCH_HEAD_NOT_FOR_MERGE:
1095 merge_status_marker = "not-for-merge";
1096 break;
1097 case FETCH_HEAD_MERGE:
1098 merge_status_marker = "";
1099 break;
1100 default:
1101 /* do not write anything to FETCH_HEAD */
1102 return;
1103 }
1104
1105 strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
1106 oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
1107 for (i = 0; i < url_len; ++i)
1108 if ('\n' == url[i])
1109 strbuf_addstr(&fetch_head->buf, "\\n");
1110 else
1111 strbuf_addch(&fetch_head->buf, url[i]);
1112 strbuf_addch(&fetch_head->buf, '\n');
1113
1114 /*
1115 * When using an atomic fetch, we do not want to update FETCH_HEAD if
1116 * any of the reference updates fails. We thus have to write all
1117 * updates to a buffer first and only commit it as soon as all
1118 * references have been successfully updated.
1119 */
1120 if (!atomic_fetch) {
1121 strbuf_write(&fetch_head->buf, fetch_head->fp);
1122 strbuf_reset(&fetch_head->buf);
1123 }
1124 }
1125
1126 static void commit_fetch_head(struct fetch_head *fetch_head)
1127 {
1128 if (!fetch_head->fp || !atomic_fetch)
1129 return;
1130 strbuf_write(&fetch_head->buf, fetch_head->fp);
1131 }
1132
1133 static void close_fetch_head(struct fetch_head *fetch_head)
1134 {
1135 if (!fetch_head->fp)
1136 return;
1137
1138 fclose(fetch_head->fp);
1139 strbuf_release(&fetch_head->buf);
1140 }
1141
1142 static const char warn_show_forced_updates[] =
1143 N_("fetch normally indicates which branches had a forced update,\n"
1144 "but that check has been disabled; to re-enable, use '--show-forced-updates'\n"
1145 "flag or run 'git config fetch.showForcedUpdates true'");
1146 static const char warn_time_show_forced_updates[] =
1147 N_("it took %.2f seconds to check forced updates; you can use\n"
1148 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
1149 "to avoid this check\n");
1150
1151 static int store_updated_refs(struct display_state *display_state,
1152 const char *remote_name,
1153 int connectivity_checked,
1154 struct ref_transaction *transaction, struct ref *ref_map,
1155 struct fetch_head *fetch_head)
1156 {
1157 int rc = 0;
1158 struct strbuf note = STRBUF_INIT;
1159 const char *what, *kind;
1160 struct ref *rm;
1161 int want_status;
1162 int summary_width = 0;
1163
1164 if (verbosity >= 0)
1165 summary_width = transport_summary_width(ref_map);
1166
1167 if (!connectivity_checked) {
1168 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1169
1170 rm = ref_map;
1171 if (check_connected(iterate_ref_map, &rm, &opt)) {
1172 rc = error(_("%s did not send all necessary objects\n"),
1173 display_state->url);
1174 goto abort;
1175 }
1176 }
1177
1178 /*
1179 * We do a pass for each fetch_head_status type in their enum order, so
1180 * merged entries are written before not-for-merge. That lets readers
1181 * use FETCH_HEAD as a refname to refer to the ref to be merged.
1182 */
1183 for (want_status = FETCH_HEAD_MERGE;
1184 want_status <= FETCH_HEAD_IGNORE;
1185 want_status++) {
1186 for (rm = ref_map; rm; rm = rm->next) {
1187 struct ref *ref = NULL;
1188
1189 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
1190 if (want_status == FETCH_HEAD_MERGE)
1191 warning(_("rejected %s because shallow roots are not allowed to be updated"),
1192 rm->peer_ref ? rm->peer_ref->name : rm->name);
1193 continue;
1194 }
1195
1196 /*
1197 * When writing FETCH_HEAD we need to determine whether
1198 * we already have the commit or not. If not, then the
1199 * reference is not for merge and needs to be written
1200 * to the reflog after other commits which we already
1201 * have. We're not interested in this property though
1202 * in case FETCH_HEAD is not to be updated, so we can
1203 * skip the classification in that case.
1204 */
1205 if (fetch_head->fp) {
1206 struct commit *commit = NULL;
1207
1208 /*
1209 * References in "refs/tags/" are often going to point
1210 * to annotated tags, which are not part of the
1211 * commit-graph. We thus only try to look up refs in
1212 * the graph which are not in that namespace to not
1213 * regress performance in repositories with many
1214 * annotated tags.
1215 */
1216 if (!starts_with(rm->name, "refs/tags/"))
1217 commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
1218 if (!commit) {
1219 commit = lookup_commit_reference_gently(the_repository,
1220 &rm->old_oid,
1221 1);
1222 if (!commit)
1223 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
1224 }
1225 }
1226
1227 if (rm->fetch_head_status != want_status)
1228 continue;
1229
1230 if (rm->peer_ref) {
1231 ref = alloc_ref(rm->peer_ref->name);
1232 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
1233 oidcpy(&ref->new_oid, &rm->old_oid);
1234 ref->force = rm->peer_ref->force;
1235 }
1236
1237 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
1238 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
1239 check_for_new_submodule_commits(&rm->old_oid);
1240 }
1241
1242 if (!strcmp(rm->name, "HEAD")) {
1243 kind = "";
1244 what = "";
1245 }
1246 else if (skip_prefix(rm->name, "refs/heads/", &what))
1247 kind = "branch";
1248 else if (skip_prefix(rm->name, "refs/tags/", &what))
1249 kind = "tag";
1250 else if (skip_prefix(rm->name, "refs/remotes/", &what))
1251 kind = "remote-tracking branch";
1252 else {
1253 kind = "";
1254 what = rm->name;
1255 }
1256
1257 strbuf_reset(&note);
1258 if (*what) {
1259 if (*kind)
1260 strbuf_addf(&note, "%s ", kind);
1261 strbuf_addf(&note, "'%s' of ", what);
1262 }
1263
1264 append_fetch_head(fetch_head, &rm->old_oid,
1265 rm->fetch_head_status,
1266 note.buf, display_state->url,
1267 display_state->url_len);
1268
1269 strbuf_reset(&note);
1270 if (ref) {
1271 rc |= update_local_ref(ref, transaction, display_state, what,
1272 rm, &note, summary_width);
1273 free(ref);
1274 } else if (write_fetch_head || dry_run) {
1275 /*
1276 * Display fetches written to FETCH_HEAD (or
1277 * would be written to FETCH_HEAD, if --dry-run
1278 * is set).
1279 */
1280 format_display(display_state, &note, '*',
1281 *kind ? kind : "branch", NULL,
1282 *what ? what : "HEAD",
1283 "FETCH_HEAD", summary_width);
1284 }
1285 if (note.len)
1286 fputs(note.buf, stderr);
1287 }
1288 }
1289
1290 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1291 error(_("some local refs could not be updated; try running\n"
1292 " 'git remote prune %s' to remove any old, conflicting "
1293 "branches"), remote_name);
1294
1295 if (advice_enabled(ADVICE_FETCH_SHOW_FORCED_UPDATES)) {
1296 if (!fetch_show_forced_updates) {
1297 warning(_(warn_show_forced_updates));
1298 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1299 warning(_(warn_time_show_forced_updates),
1300 forced_updates_ms / 1000.0);
1301 }
1302 }
1303
1304 abort:
1305 strbuf_release(&note);
1306 return rc;
1307 }
1308
1309 /*
1310 * We would want to bypass the object transfer altogether if
1311 * everything we are going to fetch already exists and is connected
1312 * locally.
1313 */
1314 static int check_exist_and_connected(struct ref *ref_map)
1315 {
1316 struct ref *rm = ref_map;
1317 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1318 struct ref *r;
1319
1320 /*
1321 * If we are deepening a shallow clone we already have these
1322 * objects reachable. Running rev-list here will return with
1323 * a good (0) exit status and we'll bypass the fetch that we
1324 * really need to perform. Claiming failure now will ensure
1325 * we perform the network exchange to deepen our history.
1326 */
1327 if (deepen)
1328 return -1;
1329
1330 /*
1331 * Similarly, if we need to refetch, we always want to perform a full
1332 * fetch ignoring existing objects.
1333 */
1334 if (refetch)
1335 return -1;
1336
1337
1338 /*
1339 * check_connected() allows objects to merely be promised, but
1340 * we need all direct targets to exist.
1341 */
1342 for (r = rm; r; r = r->next) {
1343 if (!has_object_file_with_flags(&r->old_oid,
1344 OBJECT_INFO_SKIP_FETCH_OBJECT))
1345 return -1;
1346 }
1347
1348 opt.quiet = 1;
1349 return check_connected(iterate_ref_map, &rm, &opt);
1350 }
1351
1352 static int fetch_and_consume_refs(struct display_state *display_state,
1353 struct transport *transport,
1354 struct ref_transaction *transaction,
1355 struct ref *ref_map,
1356 struct fetch_head *fetch_head)
1357 {
1358 int connectivity_checked = 1;
1359 int ret;
1360
1361 /*
1362 * We don't need to perform a fetch in case we can already satisfy all
1363 * refs.
1364 */
1365 ret = check_exist_and_connected(ref_map);
1366 if (ret) {
1367 trace2_region_enter("fetch", "fetch_refs", the_repository);
1368 ret = transport_fetch_refs(transport, ref_map);
1369 trace2_region_leave("fetch", "fetch_refs", the_repository);
1370 if (ret)
1371 goto out;
1372 connectivity_checked = transport->smart_options ?
1373 transport->smart_options->connectivity_checked : 0;
1374 }
1375
1376 trace2_region_enter("fetch", "consume_refs", the_repository);
1377 ret = store_updated_refs(display_state, transport->remote->name,
1378 connectivity_checked, transaction, ref_map,
1379 fetch_head);
1380 trace2_region_leave("fetch", "consume_refs", the_repository);
1381
1382 out:
1383 transport_unlock_pack(transport, 0);
1384 return ret;
1385 }
1386
1387 static int prune_refs(struct display_state *display_state,
1388 struct refspec *rs,
1389 struct ref_transaction *transaction,
1390 struct ref *ref_map)
1391 {
1392 int result = 0;
1393 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1394 struct strbuf err = STRBUF_INIT;
1395 const char *dangling_msg = dry_run
1396 ? _(" (%s will become dangling)")
1397 : _(" (%s has become dangling)");
1398
1399 if (!dry_run) {
1400 if (transaction) {
1401 for (ref = stale_refs; ref; ref = ref->next) {
1402 result = ref_transaction_delete(transaction, ref->name, NULL, 0,
1403 "fetch: prune", &err);
1404 if (result)
1405 goto cleanup;
1406 }
1407 } else {
1408 struct string_list refnames = STRING_LIST_INIT_NODUP;
1409
1410 for (ref = stale_refs; ref; ref = ref->next)
1411 string_list_append(&refnames, ref->name);
1412
1413 result = delete_refs("fetch: prune", &refnames, 0);
1414 string_list_clear(&refnames, 0);
1415 }
1416 }
1417
1418 if (verbosity >= 0) {
1419 int summary_width = transport_summary_width(stale_refs);
1420
1421 for (ref = stale_refs; ref; ref = ref->next) {
1422 struct strbuf sb = STRBUF_INIT;
1423 format_display(display_state, &sb, '-', _("[deleted]"), NULL,
1424 _("(none)"), ref->name,
1425 summary_width);
1426 fputs(sb.buf, stderr);
1427 strbuf_release(&sb);
1428 warn_dangling_symref(stderr, dangling_msg, ref->name);
1429 }
1430 }
1431
1432 cleanup:
1433 strbuf_release(&err);
1434 free_refs(stale_refs);
1435 return result;
1436 }
1437
1438 static void check_not_current_branch(struct ref *ref_map)
1439 {
1440 const char *path;
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 (path = branch_checked_out(ref_map->peer_ref->name)))
1445 die(_("refusing to fetch into branch '%s' "
1446 "checked out at '%s'"),
1447 ref_map->peer_ref->name, path);
1448 }
1449
1450 static int truncate_fetch_head(void)
1451 {
1452 const char *filename = git_path_fetch_head(the_repository);
1453 FILE *fp = fopen_for_writing(filename);
1454
1455 if (!fp)
1456 return error_errno(_("cannot open '%s'"), filename);
1457 fclose(fp);
1458 return 0;
1459 }
1460
1461 static void set_option(struct transport *transport, const char *name, const char *value)
1462 {
1463 int r = transport_set_option(transport, name, value);
1464 if (r < 0)
1465 die(_("option \"%s\" value \"%s\" is not valid for %s"),
1466 name, value, transport->url);
1467 if (r > 0)
1468 warning(_("option \"%s\" is ignored for %s\n"),
1469 name, transport->url);
1470 }
1471
1472
1473 static int add_oid(const char *refname UNUSED,
1474 const struct object_id *oid,
1475 int flags UNUSED, void *cb_data)
1476 {
1477 struct oid_array *oids = cb_data;
1478
1479 oid_array_append(oids, oid);
1480 return 0;
1481 }
1482
1483 static void add_negotiation_tips(struct git_transport_options *smart_options)
1484 {
1485 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1486 int i;
1487
1488 for (i = 0; i < negotiation_tip.nr; i++) {
1489 const char *s = negotiation_tip.items[i].string;
1490 int old_nr;
1491 if (!has_glob_specials(s)) {
1492 struct object_id oid;
1493 if (get_oid(s, &oid))
1494 die(_("%s is not a valid object"), s);
1495 if (!has_object(the_repository, &oid, 0))
1496 die(_("the object %s does not exist"), s);
1497 oid_array_append(oids, &oid);
1498 continue;
1499 }
1500 old_nr = oids->nr;
1501 for_each_glob_ref(add_oid, s, oids);
1502 if (old_nr == oids->nr)
1503 warning("ignoring --negotiation-tip=%s because it does not match any refs",
1504 s);
1505 }
1506 smart_options->negotiation_tips = oids;
1507 }
1508
1509 static struct transport *prepare_transport(struct remote *remote, int deepen)
1510 {
1511 struct transport *transport;
1512
1513 transport = transport_get(remote, NULL);
1514 transport_set_verbosity(transport, verbosity, progress);
1515 transport->family = family;
1516 if (upload_pack)
1517 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1518 if (keep)
1519 set_option(transport, TRANS_OPT_KEEP, "yes");
1520 if (depth)
1521 set_option(transport, TRANS_OPT_DEPTH, depth);
1522 if (deepen && deepen_since)
1523 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1524 if (deepen && deepen_not.nr)
1525 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1526 (const char *)&deepen_not);
1527 if (deepen_relative)
1528 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1529 if (update_shallow)
1530 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1531 if (refetch)
1532 set_option(transport, TRANS_OPT_REFETCH, "yes");
1533 if (filter_options.choice) {
1534 const char *spec =
1535 expand_list_objects_filter_spec(&filter_options);
1536 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1537 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1538 }
1539 if (negotiation_tip.nr) {
1540 if (transport->smart_options)
1541 add_negotiation_tips(transport->smart_options);
1542 else
1543 warning("ignoring --negotiation-tip because the protocol does not support it");
1544 }
1545 return transport;
1546 }
1547
1548 static int backfill_tags(struct display_state *display_state,
1549 struct transport *transport,
1550 struct ref_transaction *transaction,
1551 struct ref *ref_map,
1552 struct fetch_head *fetch_head)
1553 {
1554 int retcode, cannot_reuse;
1555
1556 /*
1557 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1558 * when remote helper is used (setting it to an empty string
1559 * is not unsetting). We could extend the remote helper
1560 * protocol for that, but for now, just force a new connection
1561 * without deepen-since. Similar story for deepen-not.
1562 */
1563 cannot_reuse = transport->cannot_reuse ||
1564 deepen_since || deepen_not.nr;
1565 if (cannot_reuse) {
1566 gsecondary = prepare_transport(transport->remote, 0);
1567 transport = gsecondary;
1568 }
1569
1570 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1571 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1572 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1573 retcode = fetch_and_consume_refs(display_state, transport, transaction, ref_map, fetch_head);
1574
1575 if (gsecondary) {
1576 transport_disconnect(gsecondary);
1577 gsecondary = NULL;
1578 }
1579
1580 return retcode;
1581 }
1582
1583 static int do_fetch(struct transport *transport,
1584 struct refspec *rs)
1585 {
1586 struct ref_transaction *transaction = NULL;
1587 struct ref *ref_map = NULL;
1588 struct display_state display_state = { 0 };
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 fetch_head fetch_head = { 0 };
1596 struct strbuf err = STRBUF_INIT;
1597
1598 if (tags == TAGS_DEFAULT) {
1599 if (transport->remote->fetch_tags == 2)
1600 tags = TAGS_SET;
1601 if (transport->remote->fetch_tags == -1)
1602 tags = TAGS_UNSET;
1603 }
1604
1605 /* if not appending, truncate FETCH_HEAD */
1606 if (!append && write_fetch_head) {
1607 retcode = truncate_fetch_head();
1608 if (retcode)
1609 goto cleanup;
1610 }
1611
1612 if (rs->nr) {
1613 int i;
1614
1615 refspec_ref_prefixes(rs, &transport_ls_refs_options.ref_prefixes);
1616
1617 /*
1618 * We can avoid listing refs if all of them are exact
1619 * OIDs
1620 */
1621 must_list_refs = 0;
1622 for (i = 0; i < rs->nr; i++) {
1623 if (!rs->items[i].exact_sha1) {
1624 must_list_refs = 1;
1625 break;
1626 }
1627 }
1628 } else {
1629 struct branch *branch = branch_get(NULL);
1630
1631 if (transport->remote->fetch.nr)
1632 refspec_ref_prefixes(&transport->remote->fetch,
1633 &transport_ls_refs_options.ref_prefixes);
1634 if (branch_has_merge_config(branch) &&
1635 !strcmp(branch->remote_name, transport->remote->name)) {
1636 int i;
1637 for (i = 0; i < branch->merge_nr; i++) {
1638 strvec_push(&transport_ls_refs_options.ref_prefixes,
1639 branch->merge[i]->src);
1640 }
1641 }
1642 }
1643
1644 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1645 must_list_refs = 1;
1646 if (transport_ls_refs_options.ref_prefixes.nr)
1647 strvec_push(&transport_ls_refs_options.ref_prefixes,
1648 "refs/tags/");
1649 }
1650
1651 if (must_list_refs) {
1652 trace2_region_enter("fetch", "remote_refs", the_repository);
1653 remote_refs = transport_get_remote_refs(transport,
1654 &transport_ls_refs_options);
1655 trace2_region_leave("fetch", "remote_refs", the_repository);
1656 } else
1657 remote_refs = NULL;
1658
1659 transport_ls_refs_options_release(&transport_ls_refs_options);
1660
1661 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1662 tags, &autotags);
1663 if (!update_head_ok)
1664 check_not_current_branch(ref_map);
1665
1666 retcode = open_fetch_head(&fetch_head);
1667 if (retcode)
1668 goto cleanup;
1669
1670 display_state_init(&display_state, ref_map, transport->url);
1671
1672 if (atomic_fetch) {
1673 transaction = ref_transaction_begin(&err);
1674 if (!transaction) {
1675 retcode = error("%s", err.buf);
1676 goto cleanup;
1677 }
1678 }
1679
1680 if (tags == TAGS_DEFAULT && autotags)
1681 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1682 if (prune) {
1683 /*
1684 * We only prune based on refspecs specified
1685 * explicitly (via command line or configuration); we
1686 * don't care whether --tags was specified.
1687 */
1688 if (rs->nr) {
1689 retcode = prune_refs(&display_state, rs, transaction, ref_map);
1690 } else {
1691 retcode = prune_refs(&display_state, &transport->remote->fetch,
1692 transaction, ref_map);
1693 }
1694 if (retcode != 0)
1695 retcode = 1;
1696 }
1697
1698 if (fetch_and_consume_refs(&display_state, transport, transaction, ref_map, &fetch_head)) {
1699 retcode = 1;
1700 goto cleanup;
1701 }
1702
1703 /*
1704 * If neither --no-tags nor --tags was specified, do automated tag
1705 * following.
1706 */
1707 if (tags == TAGS_DEFAULT && autotags) {
1708 struct ref *tags_ref_map = NULL, **tail = &tags_ref_map;
1709
1710 find_non_local_tags(remote_refs, transaction, &tags_ref_map, &tail);
1711 if (tags_ref_map) {
1712 /*
1713 * If backfilling of tags fails then we want to tell
1714 * the user so, but we have to continue regardless to
1715 * populate upstream information of the references we
1716 * have already fetched above. The exception though is
1717 * when `--atomic` is passed: in that case we'll abort
1718 * the transaction and don't commit anything.
1719 */
1720 if (backfill_tags(&display_state, transport, transaction, tags_ref_map,
1721 &fetch_head))
1722 retcode = 1;
1723 }
1724
1725 free_refs(tags_ref_map);
1726 }
1727
1728 if (transaction) {
1729 if (retcode)
1730 goto cleanup;
1731
1732 retcode = ref_transaction_commit(transaction, &err);
1733 if (retcode) {
1734 error("%s", err.buf);
1735 ref_transaction_free(transaction);
1736 transaction = NULL;
1737 goto cleanup;
1738 }
1739 }
1740
1741 commit_fetch_head(&fetch_head);
1742
1743 if (set_upstream) {
1744 struct branch *branch = branch_get("HEAD");
1745 struct ref *rm;
1746 struct ref *source_ref = NULL;
1747
1748 /*
1749 * We're setting the upstream configuration for the
1750 * current branch. The relevant upstream is the
1751 * fetched branch that is meant to be merged with the
1752 * current one, i.e. the one fetched to FETCH_HEAD.
1753 *
1754 * When there are several such branches, consider the
1755 * request ambiguous and err on the safe side by doing
1756 * nothing and just emit a warning.
1757 */
1758 for (rm = ref_map; rm; rm = rm->next) {
1759 if (!rm->peer_ref) {
1760 if (source_ref) {
1761 warning(_("multiple branches detected, incompatible with --set-upstream"));
1762 goto cleanup;
1763 } else {
1764 source_ref = rm;
1765 }
1766 }
1767 }
1768 if (source_ref) {
1769 if (!branch) {
1770 const char *shortname = source_ref->name;
1771 skip_prefix(shortname, "refs/heads/", &shortname);
1772
1773 warning(_("could not set upstream of HEAD to '%s' from '%s' when "
1774 "it does not point to any branch."),
1775 shortname, transport->remote->name);
1776 goto cleanup;
1777 }
1778
1779 if (!strcmp(source_ref->name, "HEAD") ||
1780 starts_with(source_ref->name, "refs/heads/"))
1781 install_branch_config(0,
1782 branch->name,
1783 transport->remote->name,
1784 source_ref->name);
1785 else if (starts_with(source_ref->name, "refs/remotes/"))
1786 warning(_("not setting upstream for a remote remote-tracking branch"));
1787 else if (starts_with(source_ref->name, "refs/tags/"))
1788 warning(_("not setting upstream for a remote tag"));
1789 else
1790 warning(_("unknown branch type"));
1791 } else {
1792 warning(_("no source branch found;\n"
1793 "you need to specify exactly one branch with the --set-upstream option"));
1794 }
1795 }
1796
1797 cleanup:
1798 if (retcode && transaction) {
1799 ref_transaction_abort(transaction, &err);
1800 error("%s", err.buf);
1801 }
1802
1803 display_state_release(&display_state);
1804 close_fetch_head(&fetch_head);
1805 strbuf_release(&err);
1806 free_refs(ref_map);
1807 return retcode;
1808 }
1809
1810 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1811 {
1812 struct string_list *list = priv;
1813 if (!remote->skip_default_update)
1814 string_list_append(list, remote->name);
1815 return 0;
1816 }
1817
1818 struct remote_group_data {
1819 const char *name;
1820 struct string_list *list;
1821 };
1822
1823 static int get_remote_group(const char *key, const char *value, void *priv)
1824 {
1825 struct remote_group_data *g = priv;
1826
1827 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1828 /* split list by white space */
1829 while (*value) {
1830 size_t wordlen = strcspn(value, " \t\n");
1831
1832 if (wordlen >= 1)
1833 string_list_append_nodup(g->list,
1834 xstrndup(value, wordlen));
1835 value += wordlen + (value[wordlen] != '\0');
1836 }
1837 }
1838
1839 return 0;
1840 }
1841
1842 static int add_remote_or_group(const char *name, struct string_list *list)
1843 {
1844 int prev_nr = list->nr;
1845 struct remote_group_data g;
1846 g.name = name; g.list = list;
1847
1848 git_config(get_remote_group, &g);
1849 if (list->nr == prev_nr) {
1850 struct remote *remote = remote_get(name);
1851 if (!remote_is_configured(remote, 0))
1852 return 0;
1853 string_list_append(list, remote->name);
1854 }
1855 return 1;
1856 }
1857
1858 static void add_options_to_argv(struct strvec *argv)
1859 {
1860 if (dry_run)
1861 strvec_push(argv, "--dry-run");
1862 if (prune != -1)
1863 strvec_push(argv, prune ? "--prune" : "--no-prune");
1864 if (prune_tags != -1)
1865 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1866 if (update_head_ok)
1867 strvec_push(argv, "--update-head-ok");
1868 if (force)
1869 strvec_push(argv, "--force");
1870 if (keep)
1871 strvec_push(argv, "--keep");
1872 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1873 strvec_push(argv, "--recurse-submodules");
1874 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1875 strvec_push(argv, "--recurse-submodules=on-demand");
1876 if (tags == TAGS_SET)
1877 strvec_push(argv, "--tags");
1878 else if (tags == TAGS_UNSET)
1879 strvec_push(argv, "--no-tags");
1880 if (verbosity >= 2)
1881 strvec_push(argv, "-v");
1882 if (verbosity >= 1)
1883 strvec_push(argv, "-v");
1884 else if (verbosity < 0)
1885 strvec_push(argv, "-q");
1886 if (family == TRANSPORT_FAMILY_IPV4)
1887 strvec_push(argv, "--ipv4");
1888 else if (family == TRANSPORT_FAMILY_IPV6)
1889 strvec_push(argv, "--ipv6");
1890 }
1891
1892 /* Fetch multiple remotes in parallel */
1893
1894 struct parallel_fetch_state {
1895 const char **argv;
1896 struct string_list *remotes;
1897 int next, result;
1898 };
1899
1900 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1901 void *cb, void **task_cb)
1902 {
1903 struct parallel_fetch_state *state = cb;
1904 char *remote;
1905
1906 if (state->next < 0 || state->next >= state->remotes->nr)
1907 return 0;
1908
1909 remote = state->remotes->items[state->next++].string;
1910 *task_cb = remote;
1911
1912 strvec_pushv(&cp->args, state->argv);
1913 strvec_push(&cp->args, remote);
1914 cp->git_cmd = 1;
1915
1916 if (verbosity >= 0)
1917 printf(_("Fetching %s\n"), remote);
1918
1919 return 1;
1920 }
1921
1922 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1923 {
1924 struct parallel_fetch_state *state = cb;
1925 const char *remote = task_cb;
1926
1927 state->result = error(_("could not fetch %s"), remote);
1928
1929 return 0;
1930 }
1931
1932 static int fetch_finished(int result, struct strbuf *out,
1933 void *cb, void *task_cb)
1934 {
1935 struct parallel_fetch_state *state = cb;
1936 const char *remote = task_cb;
1937
1938 if (result) {
1939 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1940 remote, result);
1941 state->result = -1;
1942 }
1943
1944 return 0;
1945 }
1946
1947 static int fetch_multiple(struct string_list *list, int max_children)
1948 {
1949 int i, result = 0;
1950 struct strvec argv = STRVEC_INIT;
1951
1952 if (!append && write_fetch_head) {
1953 int errcode = truncate_fetch_head();
1954 if (errcode)
1955 return errcode;
1956 }
1957
1958 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1959 "--no-write-commit-graph", NULL);
1960 add_options_to_argv(&argv);
1961
1962 if (max_children != 1 && list->nr != 1) {
1963 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1964 const struct run_process_parallel_opts opts = {
1965 .tr2_category = "fetch",
1966 .tr2_label = "parallel/fetch",
1967
1968 .processes = max_children,
1969
1970 .get_next_task = &fetch_next_remote,
1971 .start_failure = &fetch_failed_to_start,
1972 .task_finished = &fetch_finished,
1973 .data = &state,
1974 };
1975
1976 strvec_push(&argv, "--end-of-options");
1977
1978 run_processes_parallel(&opts);
1979 result = state.result;
1980 } else
1981 for (i = 0; i < list->nr; i++) {
1982 const char *name = list->items[i].string;
1983 struct child_process cmd = CHILD_PROCESS_INIT;
1984
1985 strvec_pushv(&cmd.args, argv.v);
1986 strvec_push(&cmd.args, name);
1987 if (verbosity >= 0)
1988 printf(_("Fetching %s\n"), name);
1989 cmd.git_cmd = 1;
1990 if (run_command(&cmd)) {
1991 error(_("could not fetch %s"), name);
1992 result = 1;
1993 }
1994 }
1995
1996 strvec_clear(&argv);
1997 return !!result;
1998 }
1999
2000 /*
2001 * Fetching from the promisor remote should use the given filter-spec
2002 * or inherit the default filter-spec from the config.
2003 */
2004 static inline void fetch_one_setup_partial(struct remote *remote)
2005 {
2006 /*
2007 * Explicit --no-filter argument overrides everything, regardless
2008 * of any prior partial clones and fetches.
2009 */
2010 if (filter_options.no_filter)
2011 return;
2012
2013 /*
2014 * If no prior partial clone/fetch and the current fetch DID NOT
2015 * request a partial-fetch, do a normal fetch.
2016 */
2017 if (!has_promisor_remote() && !filter_options.choice)
2018 return;
2019
2020 /*
2021 * If this is a partial-fetch request, we enable partial on
2022 * this repo if not already enabled and remember the given
2023 * filter-spec as the default for subsequent fetches to this
2024 * remote if there is currently no default filter-spec.
2025 */
2026 if (filter_options.choice) {
2027 partial_clone_register(remote->name, &filter_options);
2028 return;
2029 }
2030
2031 /*
2032 * Do a partial-fetch from the promisor remote using either the
2033 * explicitly given filter-spec or inherit the filter-spec from
2034 * the config.
2035 */
2036 if (!filter_options.choice)
2037 partial_clone_get_default_filter_spec(&filter_options, remote->name);
2038 return;
2039 }
2040
2041 static int fetch_one(struct remote *remote, int argc, const char **argv,
2042 int prune_tags_ok, int use_stdin_refspecs)
2043 {
2044 struct refspec rs = REFSPEC_INIT_FETCH;
2045 int i;
2046 int exit_code;
2047 int maybe_prune_tags;
2048 int remote_via_config = remote_is_configured(remote, 0);
2049
2050 if (!remote)
2051 die(_("no remote repository specified; please specify either a URL or a\n"
2052 "remote name from which new revisions should be fetched"));
2053
2054 gtransport = prepare_transport(remote, 1);
2055
2056 if (prune < 0) {
2057 /* no command line request */
2058 if (0 <= remote->prune)
2059 prune = remote->prune;
2060 else if (0 <= fetch_prune_config)
2061 prune = fetch_prune_config;
2062 else
2063 prune = PRUNE_BY_DEFAULT;
2064 }
2065
2066 if (prune_tags < 0) {
2067 /* no command line request */
2068 if (0 <= remote->prune_tags)
2069 prune_tags = remote->prune_tags;
2070 else if (0 <= fetch_prune_tags_config)
2071 prune_tags = fetch_prune_tags_config;
2072 else
2073 prune_tags = PRUNE_TAGS_BY_DEFAULT;
2074 }
2075
2076 maybe_prune_tags = prune_tags_ok && prune_tags;
2077 if (maybe_prune_tags && remote_via_config)
2078 refspec_append(&remote->fetch, TAG_REFSPEC);
2079
2080 if (maybe_prune_tags && (argc || !remote_via_config))
2081 refspec_append(&rs, TAG_REFSPEC);
2082
2083 for (i = 0; i < argc; i++) {
2084 if (!strcmp(argv[i], "tag")) {
2085 i++;
2086 if (i >= argc)
2087 die(_("you need to specify a tag name"));
2088
2089 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
2090 argv[i], argv[i]);
2091 } else {
2092 refspec_append(&rs, argv[i]);
2093 }
2094 }
2095
2096 if (use_stdin_refspecs) {
2097 struct strbuf line = STRBUF_INIT;
2098 while (strbuf_getline_lf(&line, stdin) != EOF)
2099 refspec_append(&rs, line.buf);
2100 strbuf_release(&line);
2101 }
2102
2103 if (server_options.nr)
2104 gtransport->server_options = &server_options;
2105
2106 sigchain_push_common(unlock_pack_on_signal);
2107 atexit(unlock_pack_atexit);
2108 sigchain_push(SIGPIPE, SIG_IGN);
2109 exit_code = do_fetch(gtransport, &rs);
2110 sigchain_pop(SIGPIPE);
2111 refspec_clear(&rs);
2112 transport_disconnect(gtransport);
2113 gtransport = NULL;
2114 return exit_code;
2115 }
2116
2117 int cmd_fetch(int argc, const char **argv, const char *prefix)
2118 {
2119 int i;
2120 const char *bundle_uri;
2121 struct string_list list = STRING_LIST_INIT_DUP;
2122 struct remote *remote = NULL;
2123 int result = 0;
2124 int prune_tags_ok = 1;
2125
2126 packet_trace_identity("fetch");
2127
2128 /* Record the command line for the reflog */
2129 strbuf_addstr(&default_rla, "fetch");
2130 for (i = 1; i < argc; i++) {
2131 /* This handles non-URLs gracefully */
2132 char *anon = transport_anonymize_url(argv[i]);
2133
2134 strbuf_addf(&default_rla, " %s", anon);
2135 free(anon);
2136 }
2137
2138 git_config(git_fetch_config, NULL);
2139 if (the_repository->gitdir) {
2140 prepare_repo_settings(the_repository);
2141 the_repository->settings.command_requires_full_index = 0;
2142 }
2143
2144 argc = parse_options(argc, argv, prefix,
2145 builtin_fetch_options, builtin_fetch_usage, 0);
2146
2147 if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT)
2148 recurse_submodules = recurse_submodules_cli;
2149
2150 if (negotiate_only) {
2151 switch (recurse_submodules_cli) {
2152 case RECURSE_SUBMODULES_OFF:
2153 case RECURSE_SUBMODULES_DEFAULT:
2154 /*
2155 * --negotiate-only should never recurse into
2156 * submodules. Skip it by setting recurse_submodules to
2157 * RECURSE_SUBMODULES_OFF.
2158 */
2159 recurse_submodules = RECURSE_SUBMODULES_OFF;
2160 break;
2161
2162 default:
2163 die(_("options '%s' and '%s' cannot be used together"),
2164 "--negotiate-only", "--recurse-submodules");
2165 }
2166 }
2167
2168 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
2169 int *sfjc = submodule_fetch_jobs_config == -1
2170 ? &submodule_fetch_jobs_config : NULL;
2171 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
2172 ? &recurse_submodules : NULL;
2173
2174 fetch_config_from_gitmodules(sfjc, rs);
2175 }
2176
2177 if (negotiate_only && !negotiation_tip.nr)
2178 die(_("--negotiate-only needs one or more --negotiation-tip=*"));
2179
2180 if (deepen_relative) {
2181 if (deepen_relative < 0)
2182 die(_("negative depth in --deepen is not supported"));
2183 if (depth)
2184 die(_("options '%s' and '%s' cannot be used together"), "--deepen", "--depth");
2185 depth = xstrfmt("%d", deepen_relative);
2186 }
2187 if (unshallow) {
2188 if (depth)
2189 die(_("options '%s' and '%s' cannot be used together"), "--depth", "--unshallow");
2190 else if (!is_repository_shallow(the_repository))
2191 die(_("--unshallow on a complete repository does not make sense"));
2192 else
2193 depth = xstrfmt("%d", INFINITE_DEPTH);
2194 }
2195
2196 /* no need to be strict, transport_set_option() will validate it again */
2197 if (depth && atoi(depth) < 1)
2198 die(_("depth %s is not a positive number"), depth);
2199 if (depth || deepen_since || deepen_not.nr)
2200 deepen = 1;
2201
2202 /* FETCH_HEAD never gets updated in --dry-run mode */
2203 if (dry_run)
2204 write_fetch_head = 0;
2205
2206 if (!max_jobs)
2207 max_jobs = online_cpus();
2208
2209 if (!git_config_get_string_tmp("fetch.bundleuri", &bundle_uri) &&
2210 fetch_bundle_uri(the_repository, bundle_uri, NULL))
2211 warning(_("failed to fetch bundles from '%s'"), bundle_uri);
2212
2213 if (all) {
2214 if (argc == 1)
2215 die(_("fetch --all does not take a repository argument"));
2216 else if (argc > 1)
2217 die(_("fetch --all does not make sense with refspecs"));
2218 (void) for_each_remote(get_one_remote_for_fetch, &list);
2219
2220 /* do not do fetch_multiple() of one */
2221 if (list.nr == 1)
2222 remote = remote_get(list.items[0].string);
2223 } else if (argc == 0) {
2224 /* No arguments -- use default remote */
2225 remote = remote_get(NULL);
2226 } else if (multiple) {
2227 /* All arguments are assumed to be remotes or groups */
2228 for (i = 0; i < argc; i++)
2229 if (!add_remote_or_group(argv[i], &list))
2230 die(_("no such remote or remote group: %s"),
2231 argv[i]);
2232 } else {
2233 /* Single remote or group */
2234 (void) add_remote_or_group(argv[0], &list);
2235 if (list.nr > 1) {
2236 /* More than one remote */
2237 if (argc > 1)
2238 die(_("fetching a group and specifying refspecs does not make sense"));
2239 } else {
2240 /* Zero or one remotes */
2241 remote = remote_get(argv[0]);
2242 prune_tags_ok = (argc == 1);
2243 argc--;
2244 argv++;
2245 }
2246 }
2247 string_list_remove_duplicates(&list, 0);
2248
2249 if (negotiate_only) {
2250 struct oidset acked_commits = OIDSET_INIT;
2251 struct oidset_iter iter;
2252 const struct object_id *oid;
2253
2254 if (!remote)
2255 die(_("must supply remote when using --negotiate-only"));
2256 gtransport = prepare_transport(remote, 1);
2257 if (gtransport->smart_options) {
2258 gtransport->smart_options->acked_commits = &acked_commits;
2259 } else {
2260 warning(_("protocol does not support --negotiate-only, exiting"));
2261 result = 1;
2262 goto cleanup;
2263 }
2264 if (server_options.nr)
2265 gtransport->server_options = &server_options;
2266 result = transport_fetch_refs(gtransport, NULL);
2267
2268 oidset_iter_init(&acked_commits, &iter);
2269 while ((oid = oidset_iter_next(&iter)))
2270 printf("%s\n", oid_to_hex(oid));
2271 oidset_clear(&acked_commits);
2272 } else if (remote) {
2273 if (filter_options.choice || has_promisor_remote())
2274 fetch_one_setup_partial(remote);
2275 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
2276 } else {
2277 int max_children = max_jobs;
2278
2279 if (filter_options.choice)
2280 die(_("--filter can only be used with the remote "
2281 "configured in extensions.partialclone"));
2282
2283 if (atomic_fetch)
2284 die(_("--atomic can only be used when fetching "
2285 "from one remote"));
2286
2287 if (stdin_refspecs)
2288 die(_("--stdin can only be used when fetching "
2289 "from one remote"));
2290
2291 if (max_children < 0)
2292 max_children = fetch_parallel_config;
2293
2294 /* TODO should this also die if we have a previous partial-clone? */
2295 result = fetch_multiple(&list, max_children);
2296 }
2297
2298
2299 /*
2300 * This is only needed after fetch_one(), which does not fetch
2301 * submodules by itself.
2302 *
2303 * When we fetch from multiple remotes, fetch_multiple() has
2304 * already updated submodules to grab commits necessary for
2305 * the fetched history from each remote, so there is no need
2306 * to fetch submodules from here.
2307 */
2308 if (!result && remote && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
2309 struct strvec options = STRVEC_INIT;
2310 int max_children = max_jobs;
2311
2312 if (max_children < 0)
2313 max_children = submodule_fetch_jobs_config;
2314 if (max_children < 0)
2315 max_children = fetch_parallel_config;
2316
2317 add_options_to_argv(&options);
2318 result = fetch_submodules(the_repository,
2319 &options,
2320 submodule_prefix,
2321 recurse_submodules,
2322 recurse_submodules_default,
2323 verbosity < 0,
2324 max_children);
2325 strvec_clear(&options);
2326 }
2327
2328 /*
2329 * Skip irrelevant tasks because we know objects were not
2330 * fetched.
2331 *
2332 * NEEDSWORK: as a future optimization, we can return early
2333 * whenever objects were not fetched e.g. if we already have all
2334 * of them.
2335 */
2336 if (negotiate_only)
2337 goto cleanup;
2338
2339 prepare_repo_settings(the_repository);
2340 if (fetch_write_commit_graph > 0 ||
2341 (fetch_write_commit_graph < 0 &&
2342 the_repository->settings.fetch_write_commit_graph)) {
2343 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
2344
2345 if (progress)
2346 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
2347
2348 write_commit_graph_reachable(the_repository->objects->odb,
2349 commit_graph_flags,
2350 NULL);
2351 }
2352
2353 if (enable_auto_gc) {
2354 if (refetch) {
2355 /*
2356 * Hint auto-maintenance strongly to encourage repacking,
2357 * but respect config settings disabling it.
2358 */
2359 int opt_val;
2360 if (git_config_get_int("gc.autopacklimit", &opt_val))
2361 opt_val = -1;
2362 if (opt_val != 0)
2363 git_config_push_parameter("gc.autoPackLimit=1");
2364
2365 if (git_config_get_int("maintenance.incremental-repack.auto", &opt_val))
2366 opt_val = -1;
2367 if (opt_val != 0)
2368 git_config_push_parameter("maintenance.incremental-repack.auto=-1");
2369 }
2370 run_auto_maintenance(verbosity < 0);
2371 }
2372
2373 cleanup:
2374 string_list_clear(&list, 0);
2375 return result;
2376 }
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