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fetch: refactor fetch refs to be more extendable
[git/debian.git] / builtin / fetch.c
blobef6f9b3a33e3242d511f05490dbf69083acb4d31
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
32 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
33
34 static const char * const builtin_fetch_usage[] = {
35 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
36 N_("git fetch [<options>] <group>"),
37 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
38 N_("git fetch --all [<options>]"),
39 NULL
40 };
41
42 enum {
43 TAGS_UNSET = 0,
44 TAGS_DEFAULT = 1,
45 TAGS_SET = 2
46 };
47
48 static int fetch_prune_config = -1; /* unspecified */
49 static int fetch_show_forced_updates = 1;
50 static uint64_t forced_updates_ms = 0;
51 static int prefetch = 0;
52 static int prune = -1; /* unspecified */
53 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
54
55 static int fetch_prune_tags_config = -1; /* unspecified */
56 static int prune_tags = -1; /* unspecified */
57 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
58
59 static int all, append, dry_run, force, keep, multiple, update_head_ok;
60 static int write_fetch_head = 1;
61 static int verbosity, deepen_relative, set_upstream;
62 static int progress = -1;
63 static int enable_auto_gc = 1;
64 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
65 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
66 static int fetch_parallel_config = 1;
67 static int atomic_fetch;
68 static enum transport_family family;
69 static const char *depth;
70 static const char *deepen_since;
71 static const char *upload_pack;
72 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
73 static struct strbuf default_rla = STRBUF_INIT;
74 static struct transport *gtransport;
75 static struct transport *gsecondary;
76 static const char *submodule_prefix = "";
77 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
78 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
79 static int shown_url = 0;
80 static struct refspec refmap = REFSPEC_INIT_FETCH;
81 static struct list_objects_filter_options filter_options;
82 static struct string_list server_options = STRING_LIST_INIT_DUP;
83 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
84 static int fetch_write_commit_graph = -1;
85 static int stdin_refspecs = 0;
86 static int negotiate_only;
87
88 static int git_fetch_config(const char *k, const char *v, void *cb)
89 {
90 if (!strcmp(k, "fetch.prune")) {
91 fetch_prune_config = git_config_bool(k, v);
92 return 0;
93 }
94
95 if (!strcmp(k, "fetch.prunetags")) {
96 fetch_prune_tags_config = git_config_bool(k, v);
97 return 0;
98 }
99
100 if (!strcmp(k, "fetch.showforcedupdates")) {
101 fetch_show_forced_updates = git_config_bool(k, v);
102 return 0;
103 }
104
105 if (!strcmp(k, "submodule.recurse")) {
106 int r = git_config_bool(k, v) ?
107 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
108 recurse_submodules = r;
109 }
110
111 if (!strcmp(k, "submodule.fetchjobs")) {
112 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
113 return 0;
114 } else if (!strcmp(k, "fetch.recursesubmodules")) {
115 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
116 return 0;
117 }
118
119 if (!strcmp(k, "fetch.parallel")) {
120 fetch_parallel_config = git_config_int(k, v);
121 if (fetch_parallel_config < 0)
122 die(_("fetch.parallel cannot be negative"));
123 return 0;
124 }
125
126 return git_default_config(k, v, cb);
127 }
128
129 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
130 {
131 BUG_ON_OPT_NEG(unset);
132
133 /*
134 * "git fetch --refmap='' origin foo"
135 * can be used to tell the command not to store anywhere
136 */
137 refspec_append(&refmap, arg);
138
139 return 0;
140 }
141
142 static struct option builtin_fetch_options[] = {
143 OPT__VERBOSITY(&verbosity),
144 OPT_BOOL(0, "all", &all,
145 N_("fetch from all remotes")),
146 OPT_BOOL(0, "set-upstream", &set_upstream,
147 N_("set upstream for git pull/fetch")),
148 OPT_BOOL('a', "append", &append,
149 N_("append to .git/FETCH_HEAD instead of overwriting")),
150 OPT_BOOL(0, "atomic", &atomic_fetch,
151 N_("use atomic transaction to update references")),
152 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
153 N_("path to upload pack on remote end")),
154 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
155 OPT_BOOL('m', "multiple", &multiple,
156 N_("fetch from multiple remotes")),
157 OPT_SET_INT('t', "tags", &tags,
158 N_("fetch all tags and associated objects"), TAGS_SET),
159 OPT_SET_INT('n', NULL, &tags,
160 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
161 OPT_INTEGER('j', "jobs", &max_jobs,
162 N_("number of submodules fetched in parallel")),
163 OPT_BOOL(0, "prefetch", &prefetch,
164 N_("modify the refspec to place all refs within refs/prefetch/")),
165 OPT_BOOL('p', "prune", &prune,
166 N_("prune remote-tracking branches no longer on remote")),
167 OPT_BOOL('P', "prune-tags", &prune_tags,
168 N_("prune local tags no longer on remote and clobber changed tags")),
169 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
170 N_("control recursive fetching of submodules"),
171 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
172 OPT_BOOL(0, "dry-run", &dry_run,
173 N_("dry run")),
174 OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
175 N_("write fetched references to the FETCH_HEAD file")),
176 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
177 OPT_BOOL('u', "update-head-ok", &update_head_ok,
178 N_("allow updating of HEAD ref")),
179 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
180 OPT_STRING(0, "depth", &depth, N_("depth"),
181 N_("deepen history of shallow clone")),
182 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
183 N_("deepen history of shallow repository based on time")),
184 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
185 N_("deepen history of shallow clone, excluding rev")),
186 OPT_INTEGER(0, "deepen", &deepen_relative,
187 N_("deepen history of shallow clone")),
188 OPT_SET_INT_F(0, "unshallow", &unshallow,
189 N_("convert to a complete repository"),
190 1, PARSE_OPT_NONEG),
191 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
192 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
193 OPT_CALLBACK_F(0, "recurse-submodules-default",
194 &recurse_submodules_default, N_("on-demand"),
195 N_("default for recursive fetching of submodules "
196 "(lower priority than config files)"),
197 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
198 OPT_BOOL(0, "update-shallow", &update_shallow,
199 N_("accept refs that update .git/shallow")),
200 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
201 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
202 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
203 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
204 TRANSPORT_FAMILY_IPV4),
205 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
206 TRANSPORT_FAMILY_IPV6),
207 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
208 N_("report that we have only objects reachable from this object")),
209 OPT_BOOL(0, "negotiate-only", &negotiate_only,
210 N_("do not fetch a packfile; instead, print ancestors of negotiation tips")),
211 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
212 OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
213 N_("run 'maintenance --auto' after fetching")),
214 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
215 N_("run 'maintenance --auto' after fetching")),
216 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
217 N_("check for forced-updates on all updated branches")),
218 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
219 N_("write the commit-graph after fetching")),
220 OPT_BOOL(0, "stdin", &stdin_refspecs,
221 N_("accept refspecs from stdin")),
222 OPT_END()
223 };
224
225 static void unlock_pack(void)
226 {
227 if (gtransport)
228 transport_unlock_pack(gtransport);
229 if (gsecondary)
230 transport_unlock_pack(gsecondary);
231 }
232
233 static void unlock_pack_on_signal(int signo)
234 {
235 unlock_pack();
236 sigchain_pop(signo);
237 raise(signo);
238 }
239
240 static void add_merge_config(struct ref **head,
241 const struct ref *remote_refs,
242 struct branch *branch,
243 struct ref ***tail)
244 {
245 int i;
246
247 for (i = 0; i < branch->merge_nr; i++) {
248 struct ref *rm, **old_tail = *tail;
249 struct refspec_item refspec;
250
251 for (rm = *head; rm; rm = rm->next) {
252 if (branch_merge_matches(branch, i, rm->name)) {
253 rm->fetch_head_status = FETCH_HEAD_MERGE;
254 break;
255 }
256 }
257 if (rm)
258 continue;
259
260 /*
261 * Not fetched to a remote-tracking branch? We need to fetch
262 * it anyway to allow this branch's "branch.$name.merge"
263 * to be honored by 'git pull', but we do not have to
264 * fail if branch.$name.merge is misconfigured to point
265 * at a nonexisting branch. If we were indeed called by
266 * 'git pull', it will notice the misconfiguration because
267 * there is no entry in the resulting FETCH_HEAD marked
268 * for merging.
269 */
270 memset(&refspec, 0, sizeof(refspec));
271 refspec.src = branch->merge[i]->src;
272 get_fetch_map(remote_refs, &refspec, tail, 1);
273 for (rm = *old_tail; rm; rm = rm->next)
274 rm->fetch_head_status = FETCH_HEAD_MERGE;
275 }
276 }
277
278 static void create_fetch_oidset(struct ref **head, struct oidset *out)
279 {
280 struct ref *rm = *head;
281 while (rm) {
282 oidset_insert(out, &rm->old_oid);
283 rm = rm->next;
284 }
285 }
286
287 struct refname_hash_entry {
288 struct hashmap_entry ent;
289 struct object_id oid;
290 int ignore;
291 char refname[FLEX_ARRAY];
292 };
293
294 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
295 const struct hashmap_entry *eptr,
296 const struct hashmap_entry *entry_or_key,
297 const void *keydata)
298 {
299 const struct refname_hash_entry *e1, *e2;
300
301 e1 = container_of(eptr, const struct refname_hash_entry, ent);
302 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
303 return strcmp(e1->refname, keydata ? keydata : e2->refname);
304 }
305
306 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
307 const char *refname,
308 const struct object_id *oid)
309 {
310 struct refname_hash_entry *ent;
311 size_t len = strlen(refname);
312
313 FLEX_ALLOC_MEM(ent, refname, refname, len);
314 hashmap_entry_init(&ent->ent, strhash(refname));
315 oidcpy(&ent->oid, oid);
316 hashmap_add(map, &ent->ent);
317 return ent;
318 }
319
320 static int add_one_refname(const char *refname,
321 const struct object_id *oid,
322 int flag, void *cbdata)
323 {
324 struct hashmap *refname_map = cbdata;
325
326 (void) refname_hash_add(refname_map, refname, oid);
327 return 0;
328 }
329
330 static void refname_hash_init(struct hashmap *map)
331 {
332 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
333 }
334
335 static int refname_hash_exists(struct hashmap *map, const char *refname)
336 {
337 return !!hashmap_get_from_hash(map, strhash(refname), refname);
338 }
339
340 static void clear_item(struct refname_hash_entry *item)
341 {
342 item->ignore = 1;
343 }
344
345 static void find_non_local_tags(const struct ref *refs,
346 struct ref **head,
347 struct ref ***tail)
348 {
349 struct hashmap existing_refs;
350 struct hashmap remote_refs;
351 struct oidset fetch_oids = OIDSET_INIT;
352 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
353 struct string_list_item *remote_ref_item;
354 const struct ref *ref;
355 struct refname_hash_entry *item = NULL;
356 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
357
358 refname_hash_init(&existing_refs);
359 refname_hash_init(&remote_refs);
360 create_fetch_oidset(head, &fetch_oids);
361
362 for_each_ref(add_one_refname, &existing_refs);
363 for (ref = refs; ref; ref = ref->next) {
364 if (!starts_with(ref->name, "refs/tags/"))
365 continue;
366
367 /*
368 * The peeled ref always follows the matching base
369 * ref, so if we see a peeled ref that we don't want
370 * to fetch then we can mark the ref entry in the list
371 * as one to ignore by setting util to NULL.
372 */
373 if (ends_with(ref->name, "^{}")) {
374 if (item &&
375 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
376 !oidset_contains(&fetch_oids, &ref->old_oid) &&
377 !has_object_file_with_flags(&item->oid, quick_flags) &&
378 !oidset_contains(&fetch_oids, &item->oid))
379 clear_item(item);
380 item = NULL;
381 continue;
382 }
383
384 /*
385 * If item is non-NULL here, then we previously saw a
386 * ref not followed by a peeled reference, so we need
387 * to check if it is a lightweight tag that we want to
388 * fetch.
389 */
390 if (item &&
391 !has_object_file_with_flags(&item->oid, quick_flags) &&
392 !oidset_contains(&fetch_oids, &item->oid))
393 clear_item(item);
394
395 item = NULL;
396
397 /* skip duplicates and refs that we already have */
398 if (refname_hash_exists(&remote_refs, ref->name) ||
399 refname_hash_exists(&existing_refs, ref->name))
400 continue;
401
402 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
403 string_list_insert(&remote_refs_list, ref->name);
404 }
405 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
406
407 /*
408 * We may have a final lightweight tag that needs to be
409 * checked to see if it needs fetching.
410 */
411 if (item &&
412 !has_object_file_with_flags(&item->oid, quick_flags) &&
413 !oidset_contains(&fetch_oids, &item->oid))
414 clear_item(item);
415
416 /*
417 * For all the tags in the remote_refs_list,
418 * add them to the list of refs to be fetched
419 */
420 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
421 const char *refname = remote_ref_item->string;
422 struct ref *rm;
423 unsigned int hash = strhash(refname);
424
425 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
426 struct refname_hash_entry, ent);
427 if (!item)
428 BUG("unseen remote ref?");
429
430 /* Unless we have already decided to ignore this item... */
431 if (item->ignore)
432 continue;
433
434 rm = alloc_ref(item->refname);
435 rm->peer_ref = alloc_ref(item->refname);
436 oidcpy(&rm->old_oid, &item->oid);
437 **tail = rm;
438 *tail = &rm->next;
439 }
440 hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
441 string_list_clear(&remote_refs_list, 0);
442 oidset_clear(&fetch_oids);
443 }
444
445 static void filter_prefetch_refspec(struct refspec *rs)
446 {
447 int i;
448
449 if (!prefetch)
450 return;
451
452 for (i = 0; i < rs->nr; i++) {
453 struct strbuf new_dst = STRBUF_INIT;
454 char *old_dst;
455 const char *sub = NULL;
456
457 if (rs->items[i].negative)
458 continue;
459 if (!rs->items[i].dst ||
460 (rs->items[i].src &&
461 !strncmp(rs->items[i].src, "refs/tags/", 10))) {
462 int j;
463
464 free(rs->items[i].src);
465 free(rs->items[i].dst);
466
467 for (j = i + 1; j < rs->nr; j++) {
468 rs->items[j - 1] = rs->items[j];
469 rs->raw[j - 1] = rs->raw[j];
470 }
471 rs->nr--;
472 i--;
473 continue;
474 }
475
476 old_dst = rs->items[i].dst;
477 strbuf_addstr(&new_dst, "refs/prefetch/");
478
479 /*
480 * If old_dst starts with "refs/", then place
481 * sub after that prefix. Otherwise, start at
482 * the beginning of the string.
483 */
484 if (!skip_prefix(old_dst, "refs/", &sub))
485 sub = old_dst;
486 strbuf_addstr(&new_dst, sub);
487
488 rs->items[i].dst = strbuf_detach(&new_dst, NULL);
489 rs->items[i].force = 1;
490
491 free(old_dst);
492 }
493 }
494
495 static struct ref *get_ref_map(struct remote *remote,
496 const struct ref *remote_refs,
497 struct refspec *rs,
498 int tags, int *autotags)
499 {
500 int i;
501 struct ref *rm;
502 struct ref *ref_map = NULL;
503 struct ref **tail = &ref_map;
504
505 /* opportunistically-updated references: */
506 struct ref *orefs = NULL, **oref_tail = &orefs;
507
508 struct hashmap existing_refs;
509 int existing_refs_populated = 0;
510
511 filter_prefetch_refspec(rs);
512 if (remote)
513 filter_prefetch_refspec(&remote->fetch);
514
515 if (rs->nr) {
516 struct refspec *fetch_refspec;
517
518 for (i = 0; i < rs->nr; i++) {
519 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
520 if (rs->items[i].dst && rs->items[i].dst[0])
521 *autotags = 1;
522 }
523 /* Merge everything on the command line (but not --tags) */
524 for (rm = ref_map; rm; rm = rm->next)
525 rm->fetch_head_status = FETCH_HEAD_MERGE;
526
527 /*
528 * For any refs that we happen to be fetching via
529 * command-line arguments, the destination ref might
530 * have been missing or have been different than the
531 * remote-tracking ref that would be derived from the
532 * configured refspec. In these cases, we want to
533 * take the opportunity to update their configured
534 * remote-tracking reference. However, we do not want
535 * to mention these entries in FETCH_HEAD at all, as
536 * they would simply be duplicates of existing
537 * entries, so we set them FETCH_HEAD_IGNORE below.
538 *
539 * We compute these entries now, based only on the
540 * refspecs specified on the command line. But we add
541 * them to the list following the refspecs resulting
542 * from the tags option so that one of the latter,
543 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
544 * by ref_remove_duplicates() in favor of one of these
545 * opportunistic entries with FETCH_HEAD_IGNORE.
546 */
547 if (refmap.nr)
548 fetch_refspec = &refmap;
549 else
550 fetch_refspec = &remote->fetch;
551
552 for (i = 0; i < fetch_refspec->nr; i++)
553 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
554 } else if (refmap.nr) {
555 die("--refmap option is only meaningful with command-line refspec(s).");
556 } else {
557 /* Use the defaults */
558 struct branch *branch = branch_get(NULL);
559 int has_merge = branch_has_merge_config(branch);
560 if (remote &&
561 (remote->fetch.nr ||
562 /* Note: has_merge implies non-NULL branch->remote_name */
563 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
564 for (i = 0; i < remote->fetch.nr; i++) {
565 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
566 if (remote->fetch.items[i].dst &&
567 remote->fetch.items[i].dst[0])
568 *autotags = 1;
569 if (!i && !has_merge && ref_map &&
570 !remote->fetch.items[0].pattern)
571 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
572 }
573 /*
574 * if the remote we're fetching from is the same
575 * as given in branch.<name>.remote, we add the
576 * ref given in branch.<name>.merge, too.
577 *
578 * Note: has_merge implies non-NULL branch->remote_name
579 */
580 if (has_merge &&
581 !strcmp(branch->remote_name, remote->name))
582 add_merge_config(&ref_map, remote_refs, branch, &tail);
583 } else if (!prefetch) {
584 ref_map = get_remote_ref(remote_refs, "HEAD");
585 if (!ref_map)
586 die(_("Couldn't find remote ref HEAD"));
587 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
588 tail = &ref_map->next;
589 }
590 }
591
592 if (tags == TAGS_SET)
593 /* also fetch all tags */
594 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
595 else if (tags == TAGS_DEFAULT && *autotags)
596 find_non_local_tags(remote_refs, &ref_map, &tail);
597
598 /* Now append any refs to be updated opportunistically: */
599 *tail = orefs;
600 for (rm = orefs; rm; rm = rm->next) {
601 rm->fetch_head_status = FETCH_HEAD_IGNORE;
602 tail = &rm->next;
603 }
604
605 /*
606 * apply negative refspecs first, before we remove duplicates. This is
607 * necessary as negative refspecs might remove an otherwise conflicting
608 * duplicate.
609 */
610 if (rs->nr)
611 ref_map = apply_negative_refspecs(ref_map, rs);
612 else
613 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
614
615 ref_map = ref_remove_duplicates(ref_map);
616
617 for (rm = ref_map; rm; rm = rm->next) {
618 if (rm->peer_ref) {
619 const char *refname = rm->peer_ref->name;
620 struct refname_hash_entry *peer_item;
621 unsigned int hash = strhash(refname);
622
623 if (!existing_refs_populated) {
624 refname_hash_init(&existing_refs);
625 for_each_ref(add_one_refname, &existing_refs);
626 existing_refs_populated = 1;
627 }
628
629 peer_item = hashmap_get_entry_from_hash(&existing_refs,
630 hash, refname,
631 struct refname_hash_entry, ent);
632 if (peer_item) {
633 struct object_id *old_oid = &peer_item->oid;
634 oidcpy(&rm->peer_ref->old_oid, old_oid);
635 }
636 }
637 }
638 if (existing_refs_populated)
639 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
640
641 return ref_map;
642 }
643
644 #define STORE_REF_ERROR_OTHER 1
645 #define STORE_REF_ERROR_DF_CONFLICT 2
646
647 static int s_update_ref(const char *action,
648 struct ref *ref,
649 struct ref_transaction *transaction,
650 int check_old)
651 {
652 char *msg;
653 char *rla = getenv("GIT_REFLOG_ACTION");
654 struct ref_transaction *our_transaction = NULL;
655 struct strbuf err = STRBUF_INIT;
656 int ret;
657
658 if (dry_run)
659 return 0;
660 if (!rla)
661 rla = default_rla.buf;
662 msg = xstrfmt("%s: %s", rla, action);
663
664 /*
665 * If no transaction was passed to us, we manage the transaction
666 * ourselves. Otherwise, we trust the caller to handle the transaction
667 * lifecycle.
668 */
669 if (!transaction) {
670 transaction = our_transaction = ref_transaction_begin(&err);
671 if (!transaction) {
672 ret = STORE_REF_ERROR_OTHER;
673 goto out;
674 }
675 }
676
677 ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
678 check_old ? &ref->old_oid : NULL,
679 0, msg, &err);
680 if (ret) {
681 ret = STORE_REF_ERROR_OTHER;
682 goto out;
683 }
684
685 if (our_transaction) {
686 switch (ref_transaction_commit(our_transaction, &err)) {
687 case 0:
688 break;
689 case TRANSACTION_NAME_CONFLICT:
690 ret = STORE_REF_ERROR_DF_CONFLICT;
691 goto out;
692 default:
693 ret = STORE_REF_ERROR_OTHER;
694 goto out;
695 }
696 }
697
698 out:
699 ref_transaction_free(our_transaction);
700 if (ret)
701 error("%s", err.buf);
702 strbuf_release(&err);
703 free(msg);
704 return ret;
705 }
706
707 static int refcol_width = 10;
708 static int compact_format;
709
710 static void adjust_refcol_width(const struct ref *ref)
711 {
712 int max, rlen, llen, len;
713
714 /* uptodate lines are only shown on high verbosity level */
715 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
716 return;
717
718 max = term_columns();
719 rlen = utf8_strwidth(prettify_refname(ref->name));
720
721 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
722
723 /*
724 * rough estimation to see if the output line is too long and
725 * should not be counted (we can't do precise calculation
726 * anyway because we don't know if the error explanation part
727 * will be printed in update_local_ref)
728 */
729 if (compact_format) {
730 llen = 0;
731 max = max * 2 / 3;
732 }
733 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
734 if (len >= max)
735 return;
736
737 /*
738 * Not precise calculation for compact mode because '*' can
739 * appear on the left hand side of '->' and shrink the column
740 * back.
741 */
742 if (refcol_width < rlen)
743 refcol_width = rlen;
744 }
745
746 static void prepare_format_display(struct ref *ref_map)
747 {
748 struct ref *rm;
749 const char *format = "full";
750
751 git_config_get_string_tmp("fetch.output", &format);
752 if (!strcasecmp(format, "full"))
753 compact_format = 0;
754 else if (!strcasecmp(format, "compact"))
755 compact_format = 1;
756 else
757 die(_("configuration fetch.output contains invalid value %s"),
758 format);
759
760 for (rm = ref_map; rm; rm = rm->next) {
761 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
762 !rm->peer_ref ||
763 !strcmp(rm->name, "HEAD"))
764 continue;
765
766 adjust_refcol_width(rm);
767 }
768 }
769
770 static void print_remote_to_local(struct strbuf *display,
771 const char *remote, const char *local)
772 {
773 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
774 }
775
776 static int find_and_replace(struct strbuf *haystack,
777 const char *needle,
778 const char *placeholder)
779 {
780 const char *p = NULL;
781 int plen, nlen;
782
783 nlen = strlen(needle);
784 if (ends_with(haystack->buf, needle))
785 p = haystack->buf + haystack->len - nlen;
786 else
787 p = strstr(haystack->buf, needle);
788 if (!p)
789 return 0;
790
791 if (p > haystack->buf && p[-1] != '/')
792 return 0;
793
794 plen = strlen(p);
795 if (plen > nlen && p[nlen] != '/')
796 return 0;
797
798 strbuf_splice(haystack, p - haystack->buf, nlen,
799 placeholder, strlen(placeholder));
800 return 1;
801 }
802
803 static void print_compact(struct strbuf *display,
804 const char *remote, const char *local)
805 {
806 struct strbuf r = STRBUF_INIT;
807 struct strbuf l = STRBUF_INIT;
808
809 if (!strcmp(remote, local)) {
810 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
811 return;
812 }
813
814 strbuf_addstr(&r, remote);
815 strbuf_addstr(&l, local);
816
817 if (!find_and_replace(&r, local, "*"))
818 find_and_replace(&l, remote, "*");
819 print_remote_to_local(display, r.buf, l.buf);
820
821 strbuf_release(&r);
822 strbuf_release(&l);
823 }
824
825 static void format_display(struct strbuf *display, char code,
826 const char *summary, const char *error,
827 const char *remote, const char *local,
828 int summary_width)
829 {
830 int width = (summary_width + strlen(summary) - gettext_width(summary));
831
832 strbuf_addf(display, "%c %-*s ", code, width, summary);
833 if (!compact_format)
834 print_remote_to_local(display, remote, local);
835 else
836 print_compact(display, remote, local);
837 if (error)
838 strbuf_addf(display, " (%s)", error);
839 }
840
841 static int update_local_ref(struct ref *ref,
842 struct ref_transaction *transaction,
843 const char *remote,
844 const struct ref *remote_ref,
845 struct strbuf *display,
846 int summary_width)
847 {
848 struct commit *current = NULL, *updated;
849 struct branch *current_branch = branch_get(NULL);
850 const char *pretty_ref = prettify_refname(ref->name);
851 int fast_forward = 0;
852
853 if (!repo_has_object_file(the_repository, &ref->new_oid))
854 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
855
856 if (oideq(&ref->old_oid, &ref->new_oid)) {
857 if (verbosity > 0)
858 format_display(display, '=', _("[up to date]"), NULL,
859 remote, pretty_ref, summary_width);
860 return 0;
861 }
862
863 if (current_branch &&
864 !strcmp(ref->name, current_branch->name) &&
865 !(update_head_ok || is_bare_repository()) &&
866 !is_null_oid(&ref->old_oid)) {
867 /*
868 * If this is the head, and it's not okay to update
869 * the head, and the old value of the head isn't empty...
870 */
871 format_display(display, '!', _("[rejected]"),
872 _("can't fetch in current branch"),
873 remote, pretty_ref, summary_width);
874 return 1;
875 }
876
877 if (!is_null_oid(&ref->old_oid) &&
878 starts_with(ref->name, "refs/tags/")) {
879 if (force || ref->force) {
880 int r;
881 r = s_update_ref("updating tag", ref, transaction, 0);
882 format_display(display, r ? '!' : 't', _("[tag update]"),
883 r ? _("unable to update local ref") : NULL,
884 remote, pretty_ref, summary_width);
885 return r;
886 } else {
887 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
888 remote, pretty_ref, summary_width);
889 return 1;
890 }
891 }
892
893 current = lookup_commit_reference_gently(the_repository,
894 &ref->old_oid, 1);
895 updated = lookup_commit_reference_gently(the_repository,
896 &ref->new_oid, 1);
897 if (!current || !updated) {
898 const char *msg;
899 const char *what;
900 int r;
901 /*
902 * Nicely describe the new ref we're fetching.
903 * Base this on the remote's ref name, as it's
904 * more likely to follow a standard layout.
905 */
906 const char *name = remote_ref ? remote_ref->name : "";
907 if (starts_with(name, "refs/tags/")) {
908 msg = "storing tag";
909 what = _("[new tag]");
910 } else if (starts_with(name, "refs/heads/")) {
911 msg = "storing head";
912 what = _("[new branch]");
913 } else {
914 msg = "storing ref";
915 what = _("[new ref]");
916 }
917
918 r = s_update_ref(msg, ref, transaction, 0);
919 format_display(display, r ? '!' : '*', what,
920 r ? _("unable to update local ref") : NULL,
921 remote, pretty_ref, summary_width);
922 return r;
923 }
924
925 if (fetch_show_forced_updates) {
926 uint64_t t_before = getnanotime();
927 fast_forward = in_merge_bases(current, updated);
928 forced_updates_ms += (getnanotime() - t_before) / 1000000;
929 } else {
930 fast_forward = 1;
931 }
932
933 if (fast_forward) {
934 struct strbuf quickref = STRBUF_INIT;
935 int r;
936
937 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
938 strbuf_addstr(&quickref, "..");
939 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
940 r = s_update_ref("fast-forward", ref, transaction, 1);
941 format_display(display, r ? '!' : ' ', quickref.buf,
942 r ? _("unable to update local ref") : NULL,
943 remote, pretty_ref, summary_width);
944 strbuf_release(&quickref);
945 return r;
946 } else if (force || ref->force) {
947 struct strbuf quickref = STRBUF_INIT;
948 int r;
949 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
950 strbuf_addstr(&quickref, "...");
951 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
952 r = s_update_ref("forced-update", ref, transaction, 1);
953 format_display(display, r ? '!' : '+', quickref.buf,
954 r ? _("unable to update local ref") : _("forced update"),
955 remote, pretty_ref, summary_width);
956 strbuf_release(&quickref);
957 return r;
958 } else {
959 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
960 remote, pretty_ref, summary_width);
961 return 1;
962 }
963 }
964
965 static const struct object_id *iterate_ref_map(void *cb_data)
966 {
967 struct ref **rm = cb_data;
968 struct ref *ref = *rm;
969
970 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
971 ref = ref->next;
972 if (!ref)
973 return NULL;
974 *rm = ref->next;
975 return &ref->old_oid;
976 }
977
978 struct fetch_head {
979 FILE *fp;
980 struct strbuf buf;
981 };
982
983 static int open_fetch_head(struct fetch_head *fetch_head)
984 {
985 const char *filename = git_path_fetch_head(the_repository);
986
987 if (write_fetch_head) {
988 fetch_head->fp = fopen(filename, "a");
989 if (!fetch_head->fp)
990 return error_errno(_("cannot open %s"), filename);
991 strbuf_init(&fetch_head->buf, 0);
992 } else {
993 fetch_head->fp = NULL;
994 }
995
996 return 0;
997 }
998
999 static void append_fetch_head(struct fetch_head *fetch_head,
1000 const struct object_id *old_oid,
1001 enum fetch_head_status fetch_head_status,
1002 const char *note,
1003 const char *url, size_t url_len)
1004 {
1005 char old_oid_hex[GIT_MAX_HEXSZ + 1];
1006 const char *merge_status_marker;
1007 size_t i;
1008
1009 if (!fetch_head->fp)
1010 return;
1011
1012 switch (fetch_head_status) {
1013 case FETCH_HEAD_NOT_FOR_MERGE:
1014 merge_status_marker = "not-for-merge";
1015 break;
1016 case FETCH_HEAD_MERGE:
1017 merge_status_marker = "";
1018 break;
1019 default:
1020 /* do not write anything to FETCH_HEAD */
1021 return;
1022 }
1023
1024 strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
1025 oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
1026 for (i = 0; i < url_len; ++i)
1027 if ('\n' == url[i])
1028 strbuf_addstr(&fetch_head->buf, "\\n");
1029 else
1030 strbuf_addch(&fetch_head->buf, url[i]);
1031 strbuf_addch(&fetch_head->buf, '\n');
1032
1033 /*
1034 * When using an atomic fetch, we do not want to update FETCH_HEAD if
1035 * any of the reference updates fails. We thus have to write all
1036 * updates to a buffer first and only commit it as soon as all
1037 * references have been successfully updated.
1038 */
1039 if (!atomic_fetch) {
1040 strbuf_write(&fetch_head->buf, fetch_head->fp);
1041 strbuf_reset(&fetch_head->buf);
1042 }
1043 }
1044
1045 static void commit_fetch_head(struct fetch_head *fetch_head)
1046 {
1047 if (!fetch_head->fp || !atomic_fetch)
1048 return;
1049 strbuf_write(&fetch_head->buf, fetch_head->fp);
1050 }
1051
1052 static void close_fetch_head(struct fetch_head *fetch_head)
1053 {
1054 if (!fetch_head->fp)
1055 return;
1056
1057 fclose(fetch_head->fp);
1058 strbuf_release(&fetch_head->buf);
1059 }
1060
1061 static const char warn_show_forced_updates[] =
1062 N_("Fetch normally indicates which branches had a forced update,\n"
1063 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
1064 "flag or run 'git config fetch.showForcedUpdates true'.");
1065 static const char warn_time_show_forced_updates[] =
1066 N_("It took %.2f seconds to check forced updates. You can use\n"
1067 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
1068 " to avoid this check.\n");
1069
1070 static int store_updated_refs(const char *raw_url, const char *remote_name,
1071 int connectivity_checked, struct ref *ref_map)
1072 {
1073 struct fetch_head fetch_head;
1074 int url_len, i, rc = 0;
1075 struct strbuf note = STRBUF_INIT, err = STRBUF_INIT;
1076 struct ref_transaction *transaction = NULL;
1077 const char *what, *kind;
1078 struct ref *rm;
1079 char *url;
1080 int want_status;
1081 int summary_width = transport_summary_width(ref_map);
1082
1083 rc = open_fetch_head(&fetch_head);
1084 if (rc)
1085 return -1;
1086
1087 if (raw_url)
1088 url = transport_anonymize_url(raw_url);
1089 else
1090 url = xstrdup("foreign");
1091
1092 if (!connectivity_checked) {
1093 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1094
1095 rm = ref_map;
1096 if (check_connected(iterate_ref_map, &rm, &opt)) {
1097 rc = error(_("%s did not send all necessary objects\n"), url);
1098 goto abort;
1099 }
1100 }
1101
1102 if (atomic_fetch) {
1103 transaction = ref_transaction_begin(&err);
1104 if (!transaction) {
1105 error("%s", err.buf);
1106 goto abort;
1107 }
1108 }
1109
1110 prepare_format_display(ref_map);
1111
1112 /*
1113 * We do a pass for each fetch_head_status type in their enum order, so
1114 * merged entries are written before not-for-merge. That lets readers
1115 * use FETCH_HEAD as a refname to refer to the ref to be merged.
1116 */
1117 for (want_status = FETCH_HEAD_MERGE;
1118 want_status <= FETCH_HEAD_IGNORE;
1119 want_status++) {
1120 for (rm = ref_map; rm; rm = rm->next) {
1121 struct commit *commit = NULL;
1122 struct ref *ref = NULL;
1123
1124 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
1125 if (want_status == FETCH_HEAD_MERGE)
1126 warning(_("rejected %s because shallow roots are not allowed to be updated"),
1127 rm->peer_ref ? rm->peer_ref->name : rm->name);
1128 continue;
1129 }
1130
1131 /*
1132 * References in "refs/tags/" are often going to point
1133 * to annotated tags, which are not part of the
1134 * commit-graph. We thus only try to look up refs in
1135 * the graph which are not in that namespace to not
1136 * regress performance in repositories with many
1137 * annotated tags.
1138 */
1139 if (!starts_with(rm->name, "refs/tags/"))
1140 commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
1141 if (!commit) {
1142 commit = lookup_commit_reference_gently(the_repository,
1143 &rm->old_oid,
1144 1);
1145 if (!commit)
1146 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
1147 }
1148
1149 if (rm->fetch_head_status != want_status)
1150 continue;
1151
1152 if (rm->peer_ref) {
1153 ref = alloc_ref(rm->peer_ref->name);
1154 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
1155 oidcpy(&ref->new_oid, &rm->old_oid);
1156 ref->force = rm->peer_ref->force;
1157 }
1158
1159 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
1160 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
1161 check_for_new_submodule_commits(&rm->old_oid);
1162 }
1163
1164 if (!strcmp(rm->name, "HEAD")) {
1165 kind = "";
1166 what = "";
1167 }
1168 else if (skip_prefix(rm->name, "refs/heads/", &what))
1169 kind = "branch";
1170 else if (skip_prefix(rm->name, "refs/tags/", &what))
1171 kind = "tag";
1172 else if (skip_prefix(rm->name, "refs/remotes/", &what))
1173 kind = "remote-tracking branch";
1174 else {
1175 kind = "";
1176 what = rm->name;
1177 }
1178
1179 url_len = strlen(url);
1180 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1181 ;
1182 url_len = i + 1;
1183 if (4 < i && !strncmp(".git", url + i - 3, 4))
1184 url_len = i - 3;
1185
1186 strbuf_reset(&note);
1187 if (*what) {
1188 if (*kind)
1189 strbuf_addf(&note, "%s ", kind);
1190 strbuf_addf(&note, "'%s' of ", what);
1191 }
1192
1193 append_fetch_head(&fetch_head, &rm->old_oid,
1194 rm->fetch_head_status,
1195 note.buf, url, url_len);
1196
1197 strbuf_reset(&note);
1198 if (ref) {
1199 rc |= update_local_ref(ref, transaction, what,
1200 rm, &note, summary_width);
1201 free(ref);
1202 } else if (write_fetch_head || dry_run) {
1203 /*
1204 * Display fetches written to FETCH_HEAD (or
1205 * would be written to FETCH_HEAD, if --dry-run
1206 * is set).
1207 */
1208 format_display(&note, '*',
1209 *kind ? kind : "branch", NULL,
1210 *what ? what : "HEAD",
1211 "FETCH_HEAD", summary_width);
1212 }
1213 if (note.len) {
1214 if (verbosity >= 0 && !shown_url) {
1215 fprintf(stderr, _("From %.*s\n"),
1216 url_len, url);
1217 shown_url = 1;
1218 }
1219 if (verbosity >= 0)
1220 fprintf(stderr, " %s\n", note.buf);
1221 }
1222 }
1223 }
1224
1225 if (!rc && transaction) {
1226 rc = ref_transaction_commit(transaction, &err);
1227 if (rc) {
1228 error("%s", err.buf);
1229 goto abort;
1230 }
1231 }
1232
1233 if (!rc)
1234 commit_fetch_head(&fetch_head);
1235
1236 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1237 error(_("some local refs could not be updated; try running\n"
1238 " 'git remote prune %s' to remove any old, conflicting "
1239 "branches"), remote_name);
1240
1241 if (advice_fetch_show_forced_updates) {
1242 if (!fetch_show_forced_updates) {
1243 warning(_(warn_show_forced_updates));
1244 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1245 warning(_(warn_time_show_forced_updates),
1246 forced_updates_ms / 1000.0);
1247 }
1248 }
1249
1250 abort:
1251 strbuf_release(&note);
1252 strbuf_release(&err);
1253 ref_transaction_free(transaction);
1254 free(url);
1255 close_fetch_head(&fetch_head);
1256 return rc;
1257 }
1258
1259 /*
1260 * We would want to bypass the object transfer altogether if
1261 * everything we are going to fetch already exists and is connected
1262 * locally.
1263 */
1264 static int check_exist_and_connected(struct ref *ref_map)
1265 {
1266 struct ref *rm = ref_map;
1267 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1268 struct ref *r;
1269
1270 /*
1271 * If we are deepening a shallow clone we already have these
1272 * objects reachable. Running rev-list here will return with
1273 * a good (0) exit status and we'll bypass the fetch that we
1274 * really need to perform. Claiming failure now will ensure
1275 * we perform the network exchange to deepen our history.
1276 */
1277 if (deepen)
1278 return -1;
1279
1280 /*
1281 * check_connected() allows objects to merely be promised, but
1282 * we need all direct targets to exist.
1283 */
1284 for (r = rm; r; r = r->next) {
1285 if (!has_object_file_with_flags(&r->old_oid,
1286 OBJECT_INFO_SKIP_FETCH_OBJECT))
1287 return -1;
1288 }
1289
1290 opt.quiet = 1;
1291 return check_connected(iterate_ref_map, &rm, &opt);
1292 }
1293
1294 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1295 {
1296 int ret;
1297
1298 /*
1299 * We don't need to perform a fetch in case we can already satisfy all
1300 * refs.
1301 */
1302 ret = check_exist_and_connected(ref_map);
1303 if (ret) {
1304 trace2_region_enter("fetch", "fetch_refs", the_repository);
1305 ret = transport_fetch_refs(transport, ref_map);
1306 trace2_region_leave("fetch", "fetch_refs", the_repository);
1307 if (ret)
1308 goto out;
1309 }
1310
1311 /*
1312 * Keep the new pack's ".keep" file around to allow the caller
1313 * time to update refs to reference the new objects.
1314 */
1315 return ret;
1316
1317 out:
1318 transport_unlock_pack(transport);
1319 return ret;
1320 }
1321
1322 /* Update local refs based on the ref values fetched from a remote */
1323 static int consume_refs(struct transport *transport, struct ref *ref_map)
1324 {
1325 int connectivity_checked = transport->smart_options
1326 ? transport->smart_options->connectivity_checked : 0;
1327 int ret;
1328 trace2_region_enter("fetch", "consume_refs", the_repository);
1329 ret = store_updated_refs(transport->url,
1330 transport->remote->name,
1331 connectivity_checked,
1332 ref_map);
1333 transport_unlock_pack(transport);
1334 trace2_region_leave("fetch", "consume_refs", the_repository);
1335 return ret;
1336 }
1337
1338 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1339 const char *raw_url)
1340 {
1341 int url_len, i, result = 0;
1342 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1343 char *url;
1344 int summary_width = transport_summary_width(stale_refs);
1345 const char *dangling_msg = dry_run
1346 ? _(" (%s will become dangling)")
1347 : _(" (%s has become dangling)");
1348
1349 if (raw_url)
1350 url = transport_anonymize_url(raw_url);
1351 else
1352 url = xstrdup("foreign");
1353
1354 url_len = strlen(url);
1355 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1356 ;
1357
1358 url_len = i + 1;
1359 if (4 < i && !strncmp(".git", url + i - 3, 4))
1360 url_len = i - 3;
1361
1362 if (!dry_run) {
1363 struct string_list refnames = STRING_LIST_INIT_NODUP;
1364
1365 for (ref = stale_refs; ref; ref = ref->next)
1366 string_list_append(&refnames, ref->name);
1367
1368 result = delete_refs("fetch: prune", &refnames, 0);
1369 string_list_clear(&refnames, 0);
1370 }
1371
1372 if (verbosity >= 0) {
1373 for (ref = stale_refs; ref; ref = ref->next) {
1374 struct strbuf sb = STRBUF_INIT;
1375 if (!shown_url) {
1376 fprintf(stderr, _("From %.*s\n"), url_len, url);
1377 shown_url = 1;
1378 }
1379 format_display(&sb, '-', _("[deleted]"), NULL,
1380 _("(none)"), prettify_refname(ref->name),
1381 summary_width);
1382 fprintf(stderr, " %s\n",sb.buf);
1383 strbuf_release(&sb);
1384 warn_dangling_symref(stderr, dangling_msg, ref->name);
1385 }
1386 }
1387
1388 free(url);
1389 free_refs(stale_refs);
1390 return result;
1391 }
1392
1393 static void check_not_current_branch(struct ref *ref_map)
1394 {
1395 struct branch *current_branch = branch_get(NULL);
1396
1397 if (is_bare_repository() || !current_branch)
1398 return;
1399
1400 for (; ref_map; ref_map = ref_map->next)
1401 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1402 ref_map->peer_ref->name))
1403 die(_("Refusing to fetch into current branch %s "
1404 "of non-bare repository"), current_branch->refname);
1405 }
1406
1407 static int truncate_fetch_head(void)
1408 {
1409 const char *filename = git_path_fetch_head(the_repository);
1410 FILE *fp = fopen_for_writing(filename);
1411
1412 if (!fp)
1413 return error_errno(_("cannot open %s"), filename);
1414 fclose(fp);
1415 return 0;
1416 }
1417
1418 static void set_option(struct transport *transport, const char *name, const char *value)
1419 {
1420 int r = transport_set_option(transport, name, value);
1421 if (r < 0)
1422 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1423 name, value, transport->url);
1424 if (r > 0)
1425 warning(_("Option \"%s\" is ignored for %s\n"),
1426 name, transport->url);
1427 }
1428
1429
1430 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1431 void *cb_data)
1432 {
1433 struct oid_array *oids = cb_data;
1434
1435 oid_array_append(oids, oid);
1436 return 0;
1437 }
1438
1439 static void add_negotiation_tips(struct git_transport_options *smart_options)
1440 {
1441 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1442 int i;
1443
1444 for (i = 0; i < negotiation_tip.nr; i++) {
1445 const char *s = negotiation_tip.items[i].string;
1446 int old_nr;
1447 if (!has_glob_specials(s)) {
1448 struct object_id oid;
1449 if (get_oid(s, &oid))
1450 die(_("%s is not a valid object"), s);
1451 if (!has_object(the_repository, &oid, 0))
1452 die(_("the object %s does not exist"), s);
1453 oid_array_append(oids, &oid);
1454 continue;
1455 }
1456 old_nr = oids->nr;
1457 for_each_glob_ref(add_oid, s, oids);
1458 if (old_nr == oids->nr)
1459 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1460 s);
1461 }
1462 smart_options->negotiation_tips = oids;
1463 }
1464
1465 static struct transport *prepare_transport(struct remote *remote, int deepen)
1466 {
1467 struct transport *transport;
1468
1469 transport = transport_get(remote, NULL);
1470 transport_set_verbosity(transport, verbosity, progress);
1471 transport->family = family;
1472 if (upload_pack)
1473 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1474 if (keep)
1475 set_option(transport, TRANS_OPT_KEEP, "yes");
1476 if (depth)
1477 set_option(transport, TRANS_OPT_DEPTH, depth);
1478 if (deepen && deepen_since)
1479 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1480 if (deepen && deepen_not.nr)
1481 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1482 (const char *)&deepen_not);
1483 if (deepen_relative)
1484 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1485 if (update_shallow)
1486 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1487 if (filter_options.choice) {
1488 const char *spec =
1489 expand_list_objects_filter_spec(&filter_options);
1490 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1491 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1492 }
1493 if (negotiation_tip.nr) {
1494 if (transport->smart_options)
1495 add_negotiation_tips(transport->smart_options);
1496 else
1497 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1498 }
1499 return transport;
1500 }
1501
1502 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1503 {
1504 int cannot_reuse;
1505
1506 /*
1507 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1508 * when remote helper is used (setting it to an empty string
1509 * is not unsetting). We could extend the remote helper
1510 * protocol for that, but for now, just force a new connection
1511 * without deepen-since. Similar story for deepen-not.
1512 */
1513 cannot_reuse = transport->cannot_reuse ||
1514 deepen_since || deepen_not.nr;
1515 if (cannot_reuse) {
1516 gsecondary = prepare_transport(transport->remote, 0);
1517 transport = gsecondary;
1518 }
1519
1520 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1521 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1522 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1523 if (!fetch_refs(transport, ref_map))
1524 consume_refs(transport, ref_map);
1525
1526 if (gsecondary) {
1527 transport_disconnect(gsecondary);
1528 gsecondary = NULL;
1529 }
1530 }
1531
1532 static int do_fetch(struct transport *transport,
1533 struct refspec *rs)
1534 {
1535 struct ref *ref_map;
1536 int autotags = (transport->remote->fetch_tags == 1);
1537 int retcode = 0;
1538 const struct ref *remote_refs;
1539 struct transport_ls_refs_options transport_ls_refs_options =
1540 TRANSPORT_LS_REFS_OPTIONS_INIT;
1541 int must_list_refs = 1;
1542
1543 if (tags == TAGS_DEFAULT) {
1544 if (transport->remote->fetch_tags == 2)
1545 tags = TAGS_SET;
1546 if (transport->remote->fetch_tags == -1)
1547 tags = TAGS_UNSET;
1548 }
1549
1550 /* if not appending, truncate FETCH_HEAD */
1551 if (!append && write_fetch_head) {
1552 retcode = truncate_fetch_head();
1553 if (retcode)
1554 goto cleanup;
1555 }
1556
1557 if (rs->nr) {
1558 int i;
1559
1560 refspec_ref_prefixes(rs, &transport_ls_refs_options.ref_prefixes);
1561
1562 /*
1563 * We can avoid listing refs if all of them are exact
1564 * OIDs
1565 */
1566 must_list_refs = 0;
1567 for (i = 0; i < rs->nr; i++) {
1568 if (!rs->items[i].exact_sha1) {
1569 must_list_refs = 1;
1570 break;
1571 }
1572 }
1573 } else if (transport->remote && transport->remote->fetch.nr)
1574 refspec_ref_prefixes(&transport->remote->fetch,
1575 &transport_ls_refs_options.ref_prefixes);
1576
1577 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1578 must_list_refs = 1;
1579 if (transport_ls_refs_options.ref_prefixes.nr)
1580 strvec_push(&transport_ls_refs_options.ref_prefixes,
1581 "refs/tags/");
1582 }
1583
1584 if (must_list_refs) {
1585 trace2_region_enter("fetch", "remote_refs", the_repository);
1586 remote_refs = transport_get_remote_refs(transport,
1587 &transport_ls_refs_options);
1588 trace2_region_leave("fetch", "remote_refs", the_repository);
1589 } else
1590 remote_refs = NULL;
1591
1592 strvec_clear(&transport_ls_refs_options.ref_prefixes);
1593
1594 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1595 tags, &autotags);
1596 if (!update_head_ok)
1597 check_not_current_branch(ref_map);
1598
1599 if (tags == TAGS_DEFAULT && autotags)
1600 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1601 if (prune) {
1602 /*
1603 * We only prune based on refspecs specified
1604 * explicitly (via command line or configuration); we
1605 * don't care whether --tags was specified.
1606 */
1607 if (rs->nr) {
1608 prune_refs(rs, ref_map, transport->url);
1609 } else {
1610 prune_refs(&transport->remote->fetch,
1611 ref_map,
1612 transport->url);
1613 }
1614 }
1615 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1616 free_refs(ref_map);
1617 retcode = 1;
1618 goto cleanup;
1619 }
1620
1621 if (set_upstream) {
1622 struct branch *branch = branch_get("HEAD");
1623 struct ref *rm;
1624 struct ref *source_ref = NULL;
1625
1626 /*
1627 * We're setting the upstream configuration for the
1628 * current branch. The relevant upstream is the
1629 * fetched branch that is meant to be merged with the
1630 * current one, i.e. the one fetched to FETCH_HEAD.
1631 *
1632 * When there are several such branches, consider the
1633 * request ambiguous and err on the safe side by doing
1634 * nothing and just emit a warning.
1635 */
1636 for (rm = ref_map; rm; rm = rm->next) {
1637 if (!rm->peer_ref) {
1638 if (source_ref) {
1639 warning(_("multiple branches detected, incompatible with --set-upstream"));
1640 goto skip;
1641 } else {
1642 source_ref = rm;
1643 }
1644 }
1645 }
1646 if (source_ref) {
1647 if (!strcmp(source_ref->name, "HEAD") ||
1648 starts_with(source_ref->name, "refs/heads/"))
1649 install_branch_config(0,
1650 branch->name,
1651 transport->remote->name,
1652 source_ref->name);
1653 else if (starts_with(source_ref->name, "refs/remotes/"))
1654 warning(_("not setting upstream for a remote remote-tracking branch"));
1655 else if (starts_with(source_ref->name, "refs/tags/"))
1656 warning(_("not setting upstream for a remote tag"));
1657 else
1658 warning(_("unknown branch type"));
1659 } else {
1660 warning(_("no source branch found.\n"
1661 "you need to specify exactly one branch with the --set-upstream option."));
1662 }
1663 }
1664 skip:
1665 free_refs(ref_map);
1666
1667 /* if neither --no-tags nor --tags was specified, do automated tag
1668 * following ... */
1669 if (tags == TAGS_DEFAULT && autotags) {
1670 struct ref **tail = &ref_map;
1671 ref_map = NULL;
1672 find_non_local_tags(remote_refs, &ref_map, &tail);
1673 if (ref_map)
1674 backfill_tags(transport, ref_map);
1675 free_refs(ref_map);
1676 }
1677
1678 cleanup:
1679 return retcode;
1680 }
1681
1682 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1683 {
1684 struct string_list *list = priv;
1685 if (!remote->skip_default_update)
1686 string_list_append(list, remote->name);
1687 return 0;
1688 }
1689
1690 struct remote_group_data {
1691 const char *name;
1692 struct string_list *list;
1693 };
1694
1695 static int get_remote_group(const char *key, const char *value, void *priv)
1696 {
1697 struct remote_group_data *g = priv;
1698
1699 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1700 /* split list by white space */
1701 while (*value) {
1702 size_t wordlen = strcspn(value, " \t\n");
1703
1704 if (wordlen >= 1)
1705 string_list_append_nodup(g->list,
1706 xstrndup(value, wordlen));
1707 value += wordlen + (value[wordlen] != '\0');
1708 }
1709 }
1710
1711 return 0;
1712 }
1713
1714 static int add_remote_or_group(const char *name, struct string_list *list)
1715 {
1716 int prev_nr = list->nr;
1717 struct remote_group_data g;
1718 g.name = name; g.list = list;
1719
1720 git_config(get_remote_group, &g);
1721 if (list->nr == prev_nr) {
1722 struct remote *remote = remote_get(name);
1723 if (!remote_is_configured(remote, 0))
1724 return 0;
1725 string_list_append(list, remote->name);
1726 }
1727 return 1;
1728 }
1729
1730 static void add_options_to_argv(struct strvec *argv)
1731 {
1732 if (dry_run)
1733 strvec_push(argv, "--dry-run");
1734 if (prune != -1)
1735 strvec_push(argv, prune ? "--prune" : "--no-prune");
1736 if (prune_tags != -1)
1737 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1738 if (update_head_ok)
1739 strvec_push(argv, "--update-head-ok");
1740 if (force)
1741 strvec_push(argv, "--force");
1742 if (keep)
1743 strvec_push(argv, "--keep");
1744 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1745 strvec_push(argv, "--recurse-submodules");
1746 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1747 strvec_push(argv, "--recurse-submodules=on-demand");
1748 if (tags == TAGS_SET)
1749 strvec_push(argv, "--tags");
1750 else if (tags == TAGS_UNSET)
1751 strvec_push(argv, "--no-tags");
1752 if (verbosity >= 2)
1753 strvec_push(argv, "-v");
1754 if (verbosity >= 1)
1755 strvec_push(argv, "-v");
1756 else if (verbosity < 0)
1757 strvec_push(argv, "-q");
1758 if (family == TRANSPORT_FAMILY_IPV4)
1759 strvec_push(argv, "--ipv4");
1760 else if (family == TRANSPORT_FAMILY_IPV6)
1761 strvec_push(argv, "--ipv6");
1762 }
1763
1764 /* Fetch multiple remotes in parallel */
1765
1766 struct parallel_fetch_state {
1767 const char **argv;
1768 struct string_list *remotes;
1769 int next, result;
1770 };
1771
1772 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1773 void *cb, void **task_cb)
1774 {
1775 struct parallel_fetch_state *state = cb;
1776 char *remote;
1777
1778 if (state->next < 0 || state->next >= state->remotes->nr)
1779 return 0;
1780
1781 remote = state->remotes->items[state->next++].string;
1782 *task_cb = remote;
1783
1784 strvec_pushv(&cp->args, state->argv);
1785 strvec_push(&cp->args, remote);
1786 cp->git_cmd = 1;
1787
1788 if (verbosity >= 0)
1789 printf(_("Fetching %s\n"), remote);
1790
1791 return 1;
1792 }
1793
1794 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1795 {
1796 struct parallel_fetch_state *state = cb;
1797 const char *remote = task_cb;
1798
1799 state->result = error(_("Could not fetch %s"), remote);
1800
1801 return 0;
1802 }
1803
1804 static int fetch_finished(int result, struct strbuf *out,
1805 void *cb, void *task_cb)
1806 {
1807 struct parallel_fetch_state *state = cb;
1808 const char *remote = task_cb;
1809
1810 if (result) {
1811 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1812 remote, result);
1813 state->result = -1;
1814 }
1815
1816 return 0;
1817 }
1818
1819 static int fetch_multiple(struct string_list *list, int max_children)
1820 {
1821 int i, result = 0;
1822 struct strvec argv = STRVEC_INIT;
1823
1824 if (!append && write_fetch_head) {
1825 int errcode = truncate_fetch_head();
1826 if (errcode)
1827 return errcode;
1828 }
1829
1830 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1831 "--no-write-commit-graph", NULL);
1832 add_options_to_argv(&argv);
1833
1834 if (max_children != 1 && list->nr != 1) {
1835 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1836
1837 strvec_push(&argv, "--end-of-options");
1838 result = run_processes_parallel_tr2(max_children,
1839 &fetch_next_remote,
1840 &fetch_failed_to_start,
1841 &fetch_finished,
1842 &state,
1843 "fetch", "parallel/fetch");
1844
1845 if (!result)
1846 result = state.result;
1847 } else
1848 for (i = 0; i < list->nr; i++) {
1849 const char *name = list->items[i].string;
1850 strvec_push(&argv, name);
1851 if (verbosity >= 0)
1852 printf(_("Fetching %s\n"), name);
1853 if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1854 error(_("Could not fetch %s"), name);
1855 result = 1;
1856 }
1857 strvec_pop(&argv);
1858 }
1859
1860 strvec_clear(&argv);
1861 return !!result;
1862 }
1863
1864 /*
1865 * Fetching from the promisor remote should use the given filter-spec
1866 * or inherit the default filter-spec from the config.
1867 */
1868 static inline void fetch_one_setup_partial(struct remote *remote)
1869 {
1870 /*
1871 * Explicit --no-filter argument overrides everything, regardless
1872 * of any prior partial clones and fetches.
1873 */
1874 if (filter_options.no_filter)
1875 return;
1876
1877 /*
1878 * If no prior partial clone/fetch and the current fetch DID NOT
1879 * request a partial-fetch, do a normal fetch.
1880 */
1881 if (!has_promisor_remote() && !filter_options.choice)
1882 return;
1883
1884 /*
1885 * If this is a partial-fetch request, we enable partial on
1886 * this repo if not already enabled and remember the given
1887 * filter-spec as the default for subsequent fetches to this
1888 * remote if there is currently no default filter-spec.
1889 */
1890 if (filter_options.choice) {
1891 partial_clone_register(remote->name, &filter_options);
1892 return;
1893 }
1894
1895 /*
1896 * Do a partial-fetch from the promisor remote using either the
1897 * explicitly given filter-spec or inherit the filter-spec from
1898 * the config.
1899 */
1900 if (!filter_options.choice)
1901 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1902 return;
1903 }
1904
1905 static int fetch_one(struct remote *remote, int argc, const char **argv,
1906 int prune_tags_ok, int use_stdin_refspecs)
1907 {
1908 struct refspec rs = REFSPEC_INIT_FETCH;
1909 int i;
1910 int exit_code;
1911 int maybe_prune_tags;
1912 int remote_via_config = remote_is_configured(remote, 0);
1913
1914 if (!remote)
1915 die(_("No remote repository specified. Please, specify either a URL or a\n"
1916 "remote name from which new revisions should be fetched."));
1917
1918 gtransport = prepare_transport(remote, 1);
1919
1920 if (prune < 0) {
1921 /* no command line request */
1922 if (0 <= remote->prune)
1923 prune = remote->prune;
1924 else if (0 <= fetch_prune_config)
1925 prune = fetch_prune_config;
1926 else
1927 prune = PRUNE_BY_DEFAULT;
1928 }
1929
1930 if (prune_tags < 0) {
1931 /* no command line request */
1932 if (0 <= remote->prune_tags)
1933 prune_tags = remote->prune_tags;
1934 else if (0 <= fetch_prune_tags_config)
1935 prune_tags = fetch_prune_tags_config;
1936 else
1937 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1938 }
1939
1940 maybe_prune_tags = prune_tags_ok && prune_tags;
1941 if (maybe_prune_tags && remote_via_config)
1942 refspec_append(&remote->fetch, TAG_REFSPEC);
1943
1944 if (maybe_prune_tags && (argc || !remote_via_config))
1945 refspec_append(&rs, TAG_REFSPEC);
1946
1947 for (i = 0; i < argc; i++) {
1948 if (!strcmp(argv[i], "tag")) {
1949 i++;
1950 if (i >= argc)
1951 die(_("You need to specify a tag name."));
1952
1953 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
1954 argv[i], argv[i]);
1955 } else {
1956 refspec_append(&rs, argv[i]);
1957 }
1958 }
1959
1960 if (use_stdin_refspecs) {
1961 struct strbuf line = STRBUF_INIT;
1962 while (strbuf_getline_lf(&line, stdin) != EOF)
1963 refspec_append(&rs, line.buf);
1964 strbuf_release(&line);
1965 }
1966
1967 if (server_options.nr)
1968 gtransport->server_options = &server_options;
1969
1970 sigchain_push_common(unlock_pack_on_signal);
1971 atexit(unlock_pack);
1972 sigchain_push(SIGPIPE, SIG_IGN);
1973 exit_code = do_fetch(gtransport, &rs);
1974 sigchain_pop(SIGPIPE);
1975 refspec_clear(&rs);
1976 transport_disconnect(gtransport);
1977 gtransport = NULL;
1978 return exit_code;
1979 }
1980
1981 int cmd_fetch(int argc, const char **argv, const char *prefix)
1982 {
1983 int i;
1984 struct string_list list = STRING_LIST_INIT_DUP;
1985 struct remote *remote = NULL;
1986 int result = 0;
1987 int prune_tags_ok = 1;
1988
1989 packet_trace_identity("fetch");
1990
1991 /* Record the command line for the reflog */
1992 strbuf_addstr(&default_rla, "fetch");
1993 for (i = 1; i < argc; i++) {
1994 /* This handles non-URLs gracefully */
1995 char *anon = transport_anonymize_url(argv[i]);
1996
1997 strbuf_addf(&default_rla, " %s", anon);
1998 free(anon);
1999 }
2000
2001 git_config(git_fetch_config, NULL);
2002
2003 argc = parse_options(argc, argv, prefix,
2004 builtin_fetch_options, builtin_fetch_usage, 0);
2005 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
2006 int *sfjc = submodule_fetch_jobs_config == -1
2007 ? &submodule_fetch_jobs_config : NULL;
2008 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
2009 ? &recurse_submodules : NULL;
2010
2011 fetch_config_from_gitmodules(sfjc, rs);
2012 }
2013
2014 if (negotiate_only && !negotiation_tip.nr)
2015 die(_("--negotiate-only needs one or more --negotiate-tip=*"));
2016
2017 if (deepen_relative) {
2018 if (deepen_relative < 0)
2019 die(_("Negative depth in --deepen is not supported"));
2020 if (depth)
2021 die(_("--deepen and --depth are mutually exclusive"));
2022 depth = xstrfmt("%d", deepen_relative);
2023 }
2024 if (unshallow) {
2025 if (depth)
2026 die(_("--depth and --unshallow cannot be used together"));
2027 else if (!is_repository_shallow(the_repository))
2028 die(_("--unshallow on a complete repository does not make sense"));
2029 else
2030 depth = xstrfmt("%d", INFINITE_DEPTH);
2031 }
2032
2033 /* no need to be strict, transport_set_option() will validate it again */
2034 if (depth && atoi(depth) < 1)
2035 die(_("depth %s is not a positive number"), depth);
2036 if (depth || deepen_since || deepen_not.nr)
2037 deepen = 1;
2038
2039 /* FETCH_HEAD never gets updated in --dry-run mode */
2040 if (dry_run)
2041 write_fetch_head = 0;
2042
2043 if (all) {
2044 if (argc == 1)
2045 die(_("fetch --all does not take a repository argument"));
2046 else if (argc > 1)
2047 die(_("fetch --all does not make sense with refspecs"));
2048 (void) for_each_remote(get_one_remote_for_fetch, &list);
2049 } else if (argc == 0) {
2050 /* No arguments -- use default remote */
2051 remote = remote_get(NULL);
2052 } else if (multiple) {
2053 /* All arguments are assumed to be remotes or groups */
2054 for (i = 0; i < argc; i++)
2055 if (!add_remote_or_group(argv[i], &list))
2056 die(_("No such remote or remote group: %s"), argv[i]);
2057 } else {
2058 /* Single remote or group */
2059 (void) add_remote_or_group(argv[0], &list);
2060 if (list.nr > 1) {
2061 /* More than one remote */
2062 if (argc > 1)
2063 die(_("Fetching a group and specifying refspecs does not make sense"));
2064 } else {
2065 /* Zero or one remotes */
2066 remote = remote_get(argv[0]);
2067 prune_tags_ok = (argc == 1);
2068 argc--;
2069 argv++;
2070 }
2071 }
2072
2073 if (negotiate_only) {
2074 struct oidset acked_commits = OIDSET_INIT;
2075 struct oidset_iter iter;
2076 const struct object_id *oid;
2077
2078 if (!remote)
2079 die(_("must supply remote when using --negotiate-only"));
2080 gtransport = prepare_transport(remote, 1);
2081 if (gtransport->smart_options) {
2082 gtransport->smart_options->acked_commits = &acked_commits;
2083 } else {
2084 warning(_("Protocol does not support --negotiate-only, exiting."));
2085 return 1;
2086 }
2087 if (server_options.nr)
2088 gtransport->server_options = &server_options;
2089 result = transport_fetch_refs(gtransport, NULL);
2090
2091 oidset_iter_init(&acked_commits, &iter);
2092 while ((oid = oidset_iter_next(&iter)))
2093 printf("%s\n", oid_to_hex(oid));
2094 oidset_clear(&acked_commits);
2095 } else if (remote) {
2096 if (filter_options.choice || has_promisor_remote())
2097 fetch_one_setup_partial(remote);
2098 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
2099 } else {
2100 int max_children = max_jobs;
2101
2102 if (filter_options.choice)
2103 die(_("--filter can only be used with the remote "
2104 "configured in extensions.partialclone"));
2105
2106 if (atomic_fetch)
2107 die(_("--atomic can only be used when fetching "
2108 "from one remote"));
2109
2110 if (stdin_refspecs)
2111 die(_("--stdin can only be used when fetching "
2112 "from one remote"));
2113
2114 if (max_children < 0)
2115 max_children = fetch_parallel_config;
2116
2117 /* TODO should this also die if we have a previous partial-clone? */
2118 result = fetch_multiple(&list, max_children);
2119 }
2120
2121 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
2122 struct strvec options = STRVEC_INIT;
2123 int max_children = max_jobs;
2124
2125 if (max_children < 0)
2126 max_children = submodule_fetch_jobs_config;
2127 if (max_children < 0)
2128 max_children = fetch_parallel_config;
2129
2130 add_options_to_argv(&options);
2131 result = fetch_populated_submodules(the_repository,
2132 &options,
2133 submodule_prefix,
2134 recurse_submodules,
2135 recurse_submodules_default,
2136 verbosity < 0,
2137 max_children);
2138 strvec_clear(&options);
2139 }
2140
2141 string_list_clear(&list, 0);
2142
2143 prepare_repo_settings(the_repository);
2144 if (fetch_write_commit_graph > 0 ||
2145 (fetch_write_commit_graph < 0 &&
2146 the_repository->settings.fetch_write_commit_graph)) {
2147 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
2148
2149 if (progress)
2150 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
2151
2152 write_commit_graph_reachable(the_repository->objects->odb,
2153 commit_graph_flags,
2154 NULL);
2155 }
2156
2157 close_object_store(the_repository->objects);
2158
2159 if (enable_auto_gc)
2160 run_auto_maintenance(verbosity < 0);
2161
2162 return result;
2163 }
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