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 "commit.h"
11#include "builtin.h"
12#include "string-list.h"
13#include "remote.h"
14#include "transport.h"
15#include "run-command.h"
16#include "parse-options.h"
17#include "sigchain.h"
18#include "submodule-config.h"
19#include "submodule.h"
20#include "connected.h"
21#include "argv-array.h"
22#include "utf8.h"
23#include "packfile.h"
24#include "list-objects-filter-options.h"
25#include "commit-reach.h"
26#include "branch.h"
27#include "promisor-remote.h"
28#define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
30static const char * const builtin_fetch_usage[] = {
32 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
33 N_("git fetch [<options>] <group>"),
34 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
35 N_("git fetch --all [<options>]"),
36 NULL
37};
38enum {
40 TAGS_UNSET = 0,
41 TAGS_DEFAULT = 1,
42 TAGS_SET = 2
43};
44static int fetch_prune_config = -1; /* unspecified */
46static int fetch_show_forced_updates = 1;
47static uint64_t forced_updates_ms = 0;
48static int prune = -1; /* unspecified */
49#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
50static int fetch_prune_tags_config = -1; /* unspecified */
52static int prune_tags = -1; /* unspecified */
53#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
54static int all, append, dry_run, force, keep, multiple, update_head_ok;
56static int verbosity, deepen_relative, set_upstream;
57static int progress = -1;
58static int enable_auto_gc = 1;
59static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
60static int max_children = 1;
61static enum transport_family family;
62static const char *depth;
63static const char *deepen_since;
64static const char *upload_pack;
65static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
66static struct strbuf default_rla = STRBUF_INIT;
67static struct transport *gtransport;
68static struct transport *gsecondary;
69static const char *submodule_prefix = "";
70static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
71static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
72static int shown_url = 0;
73static struct refspec refmap = REFSPEC_INIT_FETCH;
74static struct list_objects_filter_options filter_options;
75static struct string_list server_options = STRING_LIST_INIT_DUP;
76static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
77static int git_fetch_config(const char *k, const char *v, void *cb)
79{
80 if (!strcmp(k, "fetch.prune")) {
81 fetch_prune_config = git_config_bool(k, v);
82 return 0;
83 }
84 if (!strcmp(k, "fetch.prunetags")) {
86 fetch_prune_tags_config = git_config_bool(k, v);
87 return 0;
88 }
89 if (!strcmp(k, "fetch.showforcedupdates")) {
91 fetch_show_forced_updates = git_config_bool(k, v);
92 return 0;
93 }
94 if (!strcmp(k, "submodule.recurse")) {
96 int r = git_config_bool(k, v) ?
97 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
98 recurse_submodules = r;
99 }
100 if (!strcmp(k, "submodule.fetchjobs")) {
102 max_children = parse_submodule_fetchjobs(k, v);
103 return 0;
104 } else if (!strcmp(k, "fetch.recursesubmodules")) {
105 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
106 return 0;
107 }
108 return git_default_config(k, v, cb);
110}
111static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
113{
114 BUG_ON_OPT_NEG(unset);
115 /*
117 * "git fetch --refmap='' origin foo"
118 * can be used to tell the command not to store anywhere
119 */
120 refspec_append(&refmap, arg);
121 return 0;
123}
124static struct option builtin_fetch_options[] = {
126 OPT__VERBOSITY(&verbosity),
127 OPT_BOOL(0, "all", &all,
128 N_("fetch from all remotes")),
129 OPT_BOOL(0, "set-upstream", &set_upstream,
130 N_("set upstream for git pull/fetch")),
131 OPT_BOOL('a', "append", &append,
132 N_("append to .git/FETCH_HEAD instead of overwriting")),
133 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
134 N_("path to upload pack on remote end")),
135 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
136 OPT_BOOL('m', "multiple", &multiple,
137 N_("fetch from multiple remotes")),
138 OPT_SET_INT('t', "tags", &tags,
139 N_("fetch all tags and associated objects"), TAGS_SET),
140 OPT_SET_INT('n', NULL, &tags,
141 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
142 OPT_INTEGER('j', "jobs", &max_children,
143 N_("number of submodules fetched in parallel")),
144 OPT_BOOL('p', "prune", &prune,
145 N_("prune remote-tracking branches no longer on remote")),
146 OPT_BOOL('P', "prune-tags", &prune_tags,
147 N_("prune local tags no longer on remote and clobber changed tags")),
148 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
149 N_("control recursive fetching of submodules"),
150 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
151 OPT_BOOL(0, "dry-run", &dry_run,
152 N_("dry run")),
153 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
154 OPT_BOOL('u', "update-head-ok", &update_head_ok,
155 N_("allow updating of HEAD ref")),
156 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
157 OPT_STRING(0, "depth", &depth, N_("depth"),
158 N_("deepen history of shallow clone")),
159 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
160 N_("deepen history of shallow repository based on time")),
161 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
162 N_("deepen history of shallow clone, excluding rev")),
163 OPT_INTEGER(0, "deepen", &deepen_relative,
164 N_("deepen history of shallow clone")),
165 OPT_SET_INT_F(0, "unshallow", &unshallow,
166 N_("convert to a complete repository"),
167 1, PARSE_OPT_NONEG),
168 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
169 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
170 { OPTION_CALLBACK, 0, "recurse-submodules-default",
171 &recurse_submodules_default, N_("on-demand"),
172 N_("default for recursive fetching of submodules "
173 "(lower priority than config files)"),
174 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
175 OPT_BOOL(0, "update-shallow", &update_shallow,
176 N_("accept refs that update .git/shallow")),
177 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
178 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
179 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
180 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
181 TRANSPORT_FAMILY_IPV4),
182 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
183 TRANSPORT_FAMILY_IPV6),
184 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
185 N_("report that we have only objects reachable from this object")),
186 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
187 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
188 N_("run 'gc --auto' after fetching")),
189 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
190 N_("check for forced-updates on all updated branches")),
191 OPT_END()
192};
193static void unlock_pack(void)
195{
196 if (gtransport)
197 transport_unlock_pack(gtransport);
198 if (gsecondary)
199 transport_unlock_pack(gsecondary);
200}
201static void unlock_pack_on_signal(int signo)
203{
204 unlock_pack();
205 sigchain_pop(signo);
206 raise(signo);
207}
208static void add_merge_config(struct ref **head,
210 const struct ref *remote_refs,
211 struct branch *branch,
212 struct ref ***tail)
213{
214 int i;
215 for (i = 0; i < branch->merge_nr; i++) {
217 struct ref *rm, **old_tail = *tail;
218 struct refspec_item refspec;
219 for (rm = *head; rm; rm = rm->next) {
221 if (branch_merge_matches(branch, i, rm->name)) {
222 rm->fetch_head_status = FETCH_HEAD_MERGE;
223 break;
224 }
225 }
226 if (rm)
227 continue;
228 /*
230 * Not fetched to a remote-tracking branch? We need to fetch
231 * it anyway to allow this branch's "branch.$name.merge"
232 * to be honored by 'git pull', but we do not have to
233 * fail if branch.$name.merge is misconfigured to point
234 * at a nonexisting branch. If we were indeed called by
235 * 'git pull', it will notice the misconfiguration because
236 * there is no entry in the resulting FETCH_HEAD marked
237 * for merging.
238 */
239 memset(&refspec, 0, sizeof(refspec));
240 refspec.src = branch->merge[i]->src;
241 get_fetch_map(remote_refs, &refspec, tail, 1);
242 for (rm = *old_tail; rm; rm = rm->next)
243 rm->fetch_head_status = FETCH_HEAD_MERGE;
244 }
245}
246static int will_fetch(struct ref **head, const unsigned char *sha1)
248{
249 struct ref *rm = *head;
250 while (rm) {
251 if (hasheq(rm->old_oid.hash, sha1))
252 return 1;
253 rm = rm->next;
254 }
255 return 0;
256}
257struct refname_hash_entry {
259 struct hashmap_entry ent; /* must be the first member */
260 struct object_id oid;
261 int ignore;
262 char refname[FLEX_ARRAY];
263};
264static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
266 const void *e1_,
267 const void *e2_,
268 const void *keydata)
269{
270 const struct refname_hash_entry *e1 = e1_;
271 const struct refname_hash_entry *e2 = e2_;
272 return strcmp(e1->refname, keydata ? keydata : e2->refname);
274}
275static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
277 const char *refname,
278 const struct object_id *oid)
279{
280 struct refname_hash_entry *ent;
281 size_t len = strlen(refname);
282 FLEX_ALLOC_MEM(ent, refname, refname, len);
284 hashmap_entry_init(ent, strhash(refname));
285 oidcpy(&ent->oid, oid);
286 hashmap_add(map, ent);
287 return ent;
288}
289static int add_one_refname(const char *refname,
291 const struct object_id *oid,
292 int flag, void *cbdata)
293{
294 struct hashmap *refname_map = cbdata;
295 (void) refname_hash_add(refname_map, refname, oid);
297 return 0;
298}
299static void refname_hash_init(struct hashmap *map)
301{
302 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
303}
304static int refname_hash_exists(struct hashmap *map, const char *refname)
306{
307 return !!hashmap_get_from_hash(map, strhash(refname), refname);
308}
309static void clear_item(struct refname_hash_entry *item)
311{
312 item->ignore = 1;
313}
314static void find_non_local_tags(const struct ref *refs,
316 struct ref **head,
317 struct ref ***tail)
318{
319 struct hashmap existing_refs;
320 struct hashmap remote_refs;
321 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
322 struct string_list_item *remote_ref_item;
323 const struct ref *ref;
324 struct refname_hash_entry *item = NULL;
325 refname_hash_init(&existing_refs);
327 refname_hash_init(&remote_refs);
328 for_each_ref(add_one_refname, &existing_refs);
330 for (ref = refs; ref; ref = ref->next) {
331 if (!starts_with(ref->name, "refs/tags/"))
332 continue;
333 /*
335 * The peeled ref always follows the matching base
336 * ref, so if we see a peeled ref that we don't want
337 * to fetch then we can mark the ref entry in the list
338 * as one to ignore by setting util to NULL.
339 */
340 if (ends_with(ref->name, "^{}")) {
341 if (item &&
342 !has_object_file_with_flags(&ref->old_oid,
343 OBJECT_INFO_QUICK) &&
344 !will_fetch(head, ref->old_oid.hash) &&
345 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
346 !will_fetch(head, item->oid.hash))
347 clear_item(item);
348 item = NULL;
349 continue;
350 }
351 /*
353 * If item is non-NULL here, then we previously saw a
354 * ref not followed by a peeled reference, so we need
355 * to check if it is a lightweight tag that we want to
356 * fetch.
357 */
358 if (item &&
359 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
360 !will_fetch(head, item->oid.hash))
361 clear_item(item);
362 item = NULL;
364 /* skip duplicates and refs that we already have */
366 if (refname_hash_exists(&remote_refs, ref->name) ||
367 refname_hash_exists(&existing_refs, ref->name))
368 continue;
369 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
371 string_list_insert(&remote_refs_list, ref->name);
372 }
373 hashmap_free(&existing_refs, 1);
374 /*
376 * We may have a final lightweight tag that needs to be
377 * checked to see if it needs fetching.
378 */
379 if (item &&
380 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
381 !will_fetch(head, item->oid.hash))
382 clear_item(item);
383 /*
385 * For all the tags in the remote_refs_list,
386 * add them to the list of refs to be fetched
387 */
388 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
389 const char *refname = remote_ref_item->string;
390 struct ref *rm;
391 item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
393 if (!item)
394 BUG("unseen remote ref?");
395 /* Unless we have already decided to ignore this item... */
397 if (item->ignore)
398 continue;
399 rm = alloc_ref(item->refname);
401 rm->peer_ref = alloc_ref(item->refname);
402 oidcpy(&rm->old_oid, &item->oid);
403 **tail = rm;
404 *tail = &rm->next;
405 }
406 hashmap_free(&remote_refs, 1);
407 string_list_clear(&remote_refs_list, 0);
408}
409static struct ref *get_ref_map(struct remote *remote,
411 const struct ref *remote_refs,
412 struct refspec *rs,
413 int tags, int *autotags)
414{
415 int i;
416 struct ref *rm;
417 struct ref *ref_map = NULL;
418 struct ref **tail = &ref_map;
419 /* opportunistically-updated references: */
421 struct ref *orefs = NULL, **oref_tail = &orefs;
422 struct hashmap existing_refs;
424 if (rs->nr) {
426 struct refspec *fetch_refspec;
427 for (i = 0; i < rs->nr; i++) {
429 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
430 if (rs->items[i].dst && rs->items[i].dst[0])
431 *autotags = 1;
432 }
433 /* Merge everything on the command line (but not --tags) */
434 for (rm = ref_map; rm; rm = rm->next)
435 rm->fetch_head_status = FETCH_HEAD_MERGE;
436 /*
438 * For any refs that we happen to be fetching via
439 * command-line arguments, the destination ref might
440 * have been missing or have been different than the
441 * remote-tracking ref that would be derived from the
442 * configured refspec. In these cases, we want to
443 * take the opportunity to update their configured
444 * remote-tracking reference. However, we do not want
445 * to mention these entries in FETCH_HEAD at all, as
446 * they would simply be duplicates of existing
447 * entries, so we set them FETCH_HEAD_IGNORE below.
448 *
449 * We compute these entries now, based only on the
450 * refspecs specified on the command line. But we add
451 * them to the list following the refspecs resulting
452 * from the tags option so that one of the latter,
453 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
454 * by ref_remove_duplicates() in favor of one of these
455 * opportunistic entries with FETCH_HEAD_IGNORE.
456 */
457 if (refmap.nr)
458 fetch_refspec = &refmap;
459 else
460 fetch_refspec = &remote->fetch;
461 for (i = 0; i < fetch_refspec->nr; i++)
463 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
464 } else if (refmap.nr) {
465 die("--refmap option is only meaningful with command-line refspec(s).");
466 } else {
467 /* Use the defaults */
468 struct branch *branch = branch_get(NULL);
469 int has_merge = branch_has_merge_config(branch);
470 if (remote &&
471 (remote->fetch.nr ||
472 /* Note: has_merge implies non-NULL branch->remote_name */
473 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
474 for (i = 0; i < remote->fetch.nr; i++) {
475 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
476 if (remote->fetch.items[i].dst &&
477 remote->fetch.items[i].dst[0])
478 *autotags = 1;
479 if (!i && !has_merge && ref_map &&
480 !remote->fetch.items[0].pattern)
481 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
482 }
483 /*
484 * if the remote we're fetching from is the same
485 * as given in branch.<name>.remote, we add the
486 * ref given in branch.<name>.merge, too.
487 *
488 * Note: has_merge implies non-NULL branch->remote_name
489 */
490 if (has_merge &&
491 !strcmp(branch->remote_name, remote->name))
492 add_merge_config(&ref_map, remote_refs, branch, &tail);
493 } else {
494 ref_map = get_remote_ref(remote_refs, "HEAD");
495 if (!ref_map)
496 die(_("Couldn't find remote ref HEAD"));
497 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
498 tail = &ref_map->next;
499 }
500 }
501 if (tags == TAGS_SET)
503 /* also fetch all tags */
504 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
505 else if (tags == TAGS_DEFAULT && *autotags)
506 find_non_local_tags(remote_refs, &ref_map, &tail);
507 /* Now append any refs to be updated opportunistically: */
509 *tail = orefs;
510 for (rm = orefs; rm; rm = rm->next) {
511 rm->fetch_head_status = FETCH_HEAD_IGNORE;
512 tail = &rm->next;
513 }
514 ref_map = ref_remove_duplicates(ref_map);
516 refname_hash_init(&existing_refs);
518 for_each_ref(add_one_refname, &existing_refs);
519 for (rm = ref_map; rm; rm = rm->next) {
521 if (rm->peer_ref) {
522 const char *refname = rm->peer_ref->name;
523 struct refname_hash_entry *peer_item;
524 peer_item = hashmap_get_from_hash(&existing_refs,
526 strhash(refname),
527 refname);
528 if (peer_item) {
529 struct object_id *old_oid = &peer_item->oid;
530 oidcpy(&rm->peer_ref->old_oid, old_oid);
531 }
532 }
533 }
534 hashmap_free(&existing_refs, 1);
535 return ref_map;
537}
538#define STORE_REF_ERROR_OTHER 1
540#define STORE_REF_ERROR_DF_CONFLICT 2
541static int s_update_ref(const char *action,
543 struct ref *ref,
544 int check_old)
545{
546 char *msg;
547 char *rla = getenv("GIT_REFLOG_ACTION");
548 struct ref_transaction *transaction;
549 struct strbuf err = STRBUF_INIT;
550 int ret, df_conflict = 0;
551 if (dry_run)
553 return 0;
554 if (!rla)
555 rla = default_rla.buf;
556 msg = xstrfmt("%s: %s", rla, action);
557 transaction = ref_transaction_begin(&err);
559 if (!transaction ||
560 ref_transaction_update(transaction, ref->name,
561 &ref->new_oid,
562 check_old ? &ref->old_oid : NULL,
563 0, msg, &err))
564 goto fail;
565 ret = ref_transaction_commit(transaction, &err);
567 if (ret) {
568 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
569 goto fail;
570 }
571 ref_transaction_free(transaction);
573 strbuf_release(&err);
574 free(msg);
575 return 0;
576fail:
577 ref_transaction_free(transaction);
578 error("%s", err.buf);
579 strbuf_release(&err);
580 free(msg);
581 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
582 : STORE_REF_ERROR_OTHER;
583}
584static int refcol_width = 10;
586static int compact_format;
587static void adjust_refcol_width(const struct ref *ref)
589{
590 int max, rlen, llen, len;
591 /* uptodate lines are only shown on high verbosity level */
593 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
594 return;
595 max = term_columns();
597 rlen = utf8_strwidth(prettify_refname(ref->name));
598 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
600 /*
602 * rough estimation to see if the output line is too long and
603 * should not be counted (we can't do precise calculation
604 * anyway because we don't know if the error explanation part
605 * will be printed in update_local_ref)
606 */
607 if (compact_format) {
608 llen = 0;
609 max = max * 2 / 3;
610 }
611 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
612 if (len >= max)
613 return;
614 /*
616 * Not precise calculation for compact mode because '*' can
617 * appear on the left hand side of '->' and shrink the column
618 * back.
619 */
620 if (refcol_width < rlen)
621 refcol_width = rlen;
622}
623static void prepare_format_display(struct ref *ref_map)
625{
626 struct ref *rm;
627 const char *format = "full";
628 git_config_get_string_const("fetch.output", &format);
630 if (!strcasecmp(format, "full"))
631 compact_format = 0;
632 else if (!strcasecmp(format, "compact"))
633 compact_format = 1;
634 else
635 die(_("configuration fetch.output contains invalid value %s"),
636 format);
637 for (rm = ref_map; rm; rm = rm->next) {
639 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
640 !rm->peer_ref ||
641 !strcmp(rm->name, "HEAD"))
642 continue;
643 adjust_refcol_width(rm);
645 }
646}
647static void print_remote_to_local(struct strbuf *display,
649 const char *remote, const char *local)
650{
651 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
652}
653static int find_and_replace(struct strbuf *haystack,
655 const char *needle,
656 const char *placeholder)
657{
658 const char *p = NULL;
659 int plen, nlen;
660 nlen = strlen(needle);
662 if (ends_with(haystack->buf, needle))
663 p = haystack->buf + haystack->len - nlen;
664 else
665 p = strstr(haystack->buf, needle);
666 if (!p)
667 return 0;
668 if (p > haystack->buf && p[-1] != '/')
670 return 0;
671 plen = strlen(p);
673 if (plen > nlen && p[nlen] != '/')
674 return 0;
675 strbuf_splice(haystack, p - haystack->buf, nlen,
677 placeholder, strlen(placeholder));
678 return 1;
679}
680static void print_compact(struct strbuf *display,
682 const char *remote, const char *local)
683{
684 struct strbuf r = STRBUF_INIT;
685 struct strbuf l = STRBUF_INIT;
686 if (!strcmp(remote, local)) {
688 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
689 return;
690 }
691 strbuf_addstr(&r, remote);
693 strbuf_addstr(&l, local);
694 if (!find_and_replace(&r, local, "*"))
696 find_and_replace(&l, remote, "*");
697 print_remote_to_local(display, r.buf, l.buf);
698 strbuf_release(&r);
700 strbuf_release(&l);
701}
702static void format_display(struct strbuf *display, char code,
704 const char *summary, const char *error,
705 const char *remote, const char *local,
706 int summary_width)
707{
708 int width = (summary_width + strlen(summary) - gettext_width(summary));
709 strbuf_addf(display, "%c %-*s ", code, width, summary);
711 if (!compact_format)
712 print_remote_to_local(display, remote, local);
713 else
714 print_compact(display, remote, local);
715 if (error)
716 strbuf_addf(display, " (%s)", error);
717}
718static int update_local_ref(struct ref *ref,
720 const char *remote,
721 const struct ref *remote_ref,
722 struct strbuf *display,
723 int summary_width)
724{
725 struct commit *current = NULL, *updated;
726 enum object_type type;
727 struct branch *current_branch = branch_get(NULL);
728 const char *pretty_ref = prettify_refname(ref->name);
729 int fast_forward = 0;
730 type = oid_object_info(the_repository, &ref->new_oid, NULL);
732 if (type < 0)
733 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
734 if (oideq(&ref->old_oid, &ref->new_oid)) {
736 if (verbosity > 0)
737 format_display(display, '=', _("[up to date]"), NULL,
738 remote, pretty_ref, summary_width);
739 return 0;
740 }
741 if (current_branch &&
743 !strcmp(ref->name, current_branch->name) &&
744 !(update_head_ok || is_bare_repository()) &&
745 !is_null_oid(&ref->old_oid)) {
746 /*
747 * If this is the head, and it's not okay to update
748 * the head, and the old value of the head isn't empty...
749 */
750 format_display(display, '!', _("[rejected]"),
751 _("can't fetch in current branch"),
752 remote, pretty_ref, summary_width);
753 return 1;
754 }
755 if (!is_null_oid(&ref->old_oid) &&
757 starts_with(ref->name, "refs/tags/")) {
758 if (force || ref->force) {
759 int r;
760 r = s_update_ref("updating tag", ref, 0);
761 format_display(display, r ? '!' : 't', _("[tag update]"),
762 r ? _("unable to update local ref") : NULL,
763 remote, pretty_ref, summary_width);
764 return r;
765 } else {
766 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
767 remote, pretty_ref, summary_width);
768 return 1;
769 }
770 }
771 current = lookup_commit_reference_gently(the_repository,
773 &ref->old_oid, 1);
774 updated = lookup_commit_reference_gently(the_repository,
775 &ref->new_oid, 1);
776 if (!current || !updated) {
777 const char *msg;
778 const char *what;
779 int r;
780 /*
781 * Nicely describe the new ref we're fetching.
782 * Base this on the remote's ref name, as it's
783 * more likely to follow a standard layout.
784 */
785 const char *name = remote_ref ? remote_ref->name : "";
786 if (starts_with(name, "refs/tags/")) {
787 msg = "storing tag";
788 what = _("[new tag]");
789 } else if (starts_with(name, "refs/heads/")) {
790 msg = "storing head";
791 what = _("[new branch]");
792 } else {
793 msg = "storing ref";
794 what = _("[new ref]");
795 }
796 r = s_update_ref(msg, ref, 0);
798 format_display(display, r ? '!' : '*', what,
799 r ? _("unable to update local ref") : NULL,
800 remote, pretty_ref, summary_width);
801 return r;
802 }
803 if (fetch_show_forced_updates) {
805 uint64_t t_before = getnanotime();
806 fast_forward = in_merge_bases(current, updated);
807 forced_updates_ms += (getnanotime() - t_before) / 1000000;
808 } else {
809 fast_forward = 1;
810 }
811 if (fast_forward) {
813 struct strbuf quickref = STRBUF_INIT;
814 int r;
815 strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
817 strbuf_addstr(&quickref, "..");
818 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
819 r = s_update_ref("fast-forward", ref, 1);
820 format_display(display, r ? '!' : ' ', quickref.buf,
821 r ? _("unable to update local ref") : NULL,
822 remote, pretty_ref, summary_width);
823 strbuf_release(&quickref);
824 return r;
825 } else if (force || ref->force) {
826 struct strbuf quickref = STRBUF_INIT;
827 int r;
828 strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
829 strbuf_addstr(&quickref, "...");
830 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
831 r = s_update_ref("forced-update", ref, 1);
832 format_display(display, r ? '!' : '+', quickref.buf,
833 r ? _("unable to update local ref") : _("forced update"),
834 remote, pretty_ref, summary_width);
835 strbuf_release(&quickref);
836 return r;
837 } else {
838 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
839 remote, pretty_ref, summary_width);
840 return 1;
841 }
842}
843static int iterate_ref_map(void *cb_data, struct object_id *oid)
845{
846 struct ref **rm = cb_data;
847 struct ref *ref = *rm;
848 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
850 ref = ref->next;
851 if (!ref)
852 return -1; /* end of the list */
853 *rm = ref->next;
854 oidcpy(oid, &ref->old_oid);
855 return 0;
856}
857static const char warn_show_forced_updates[] =
859N_("Fetch normally indicates which branches had a forced update,\n"
860 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
861 "flag or run 'git config fetch.showForcedUpdates true'.");
862static const char warn_time_show_forced_updates[] =
863N_("It took %.2f seconds to check forced updates. You can use\n"
864 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
865 " to avoid this check.\n");
866static int store_updated_refs(const char *raw_url, const char *remote_name,
868 int connectivity_checked, struct ref *ref_map)
869{
870 FILE *fp;
871 struct commit *commit;
872 int url_len, i, rc = 0;
873 struct strbuf note = STRBUF_INIT;
874 const char *what, *kind;
875 struct ref *rm;
876 char *url;
877 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
878 int want_status;
879 int summary_width = transport_summary_width(ref_map);
880 fp = fopen(filename, "a");
882 if (!fp)
883 return error_errno(_("cannot open %s"), filename);
884 if (raw_url)
886 url = transport_anonymize_url(raw_url);
887 else
888 url = xstrdup("foreign");
889 if (!connectivity_checked) {
891 rm = ref_map;
892 if (check_connected(iterate_ref_map, &rm, NULL)) {
893 rc = error(_("%s did not send all necessary objects\n"), url);
894 goto abort;
895 }
896 }
897 prepare_format_display(ref_map);
899 /*
901 * We do a pass for each fetch_head_status type in their enum order, so
902 * merged entries are written before not-for-merge. That lets readers
903 * use FETCH_HEAD as a refname to refer to the ref to be merged.
904 */
905 for (want_status = FETCH_HEAD_MERGE;
906 want_status <= FETCH_HEAD_IGNORE;
907 want_status++) {
908 for (rm = ref_map; rm; rm = rm->next) {
909 struct ref *ref = NULL;
910 const char *merge_status_marker = "";
911 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
913 if (want_status == FETCH_HEAD_MERGE)
914 warning(_("reject %s because shallow roots are not allowed to be updated"),
915 rm->peer_ref ? rm->peer_ref->name : rm->name);
916 continue;
917 }
918 commit = lookup_commit_reference_gently(the_repository,
920 &rm->old_oid,
921 1);
922 if (!commit)
923 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
924 if (rm->fetch_head_status != want_status)
926 continue;
927 if (rm->peer_ref) {
929 ref = alloc_ref(rm->peer_ref->name);
930 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
931 oidcpy(&ref->new_oid, &rm->old_oid);
932 ref->force = rm->peer_ref->force;
933 }
934 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
936 check_for_new_submodule_commits(&rm->old_oid);
937 if (!strcmp(rm->name, "HEAD")) {
939 kind = "";
940 what = "";
941 }
942 else if (starts_with(rm->name, "refs/heads/")) {
943 kind = "branch";
944 what = rm->name + 11;
945 }
946 else if (starts_with(rm->name, "refs/tags/")) {
947 kind = "tag";
948 what = rm->name + 10;
949 }
950 else if (starts_with(rm->name, "refs/remotes/")) {
951 kind = "remote-tracking branch";
952 what = rm->name + 13;
953 }
954 else {
955 kind = "";
956 what = rm->name;
957 }
958 url_len = strlen(url);
960 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
961 ;
962 url_len = i + 1;
963 if (4 < i && !strncmp(".git", url + i - 3, 4))
964 url_len = i - 3;
965 strbuf_reset(¬e);
967 if (*what) {
968 if (*kind)
969 strbuf_addf(¬e, "%s ", kind);
970 strbuf_addf(¬e, "'%s' of ", what);
971 }
972 switch (rm->fetch_head_status) {
973 case FETCH_HEAD_NOT_FOR_MERGE:
974 merge_status_marker = "not-for-merge";
975 /* fall-through */
976 case FETCH_HEAD_MERGE:
977 fprintf(fp, "%s\t%s\t%s",
978 oid_to_hex(&rm->old_oid),
979 merge_status_marker,
980 note.buf);
981 for (i = 0; i < url_len; ++i)
982 if ('\n' == url[i])
983 fputs("\\n", fp);
984 else
985 fputc(url[i], fp);
986 fputc('\n', fp);
987 break;
988 default:
989 /* do not write anything to FETCH_HEAD */
990 break;
991 }
992 strbuf_reset(¬e);
994 if (ref) {
995 rc |= update_local_ref(ref, what, rm, ¬e,
996 summary_width);
997 free(ref);
998 } else
999 format_display(¬e, '*',
1000 *kind ? kind : "branch", NULL,
1001 *what ? what : "HEAD",
1002 "FETCH_HEAD", summary_width);
1003 if (note.len) {
1004 if (verbosity >= 0 && !shown_url) {
1005 fprintf(stderr, _("From %.*s\n"),
1006 url_len, url);
1007 shown_url = 1;
1008 }
1009 if (verbosity >= 0)
1010 fprintf(stderr, " %s\n", note.buf);
1011 }
1012 }
1013 }
1014 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1016 error(_("some local refs could not be updated; try running\n"
1017 " 'git remote prune %s' to remove any old, conflicting "
1018 "branches"), remote_name);
1019 if (advice_fetch_show_forced_updates) {
1021 if (!fetch_show_forced_updates) {
1022 warning(_(warn_show_forced_updates));
1023 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1024 warning(_(warn_time_show_forced_updates),
1025 forced_updates_ms / 1000.0);
1026 }
1027 }
1028 abort:
1030 strbuf_release(¬e);
1031 free(url);
1032 fclose(fp);
1033 return rc;
1034}
1035/*
1037 * We would want to bypass the object transfer altogether if
1038 * everything we are going to fetch already exists and is connected
1039 * locally.
1040 */
1041static int check_exist_and_connected(struct ref *ref_map)
1042{
1043 struct ref *rm = ref_map;
1044 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1045 struct ref *r;
1046 /*
1048 * If we are deepening a shallow clone we already have these
1049 * objects reachable. Running rev-list here will return with
1050 * a good (0) exit status and we'll bypass the fetch that we
1051 * really need to perform. Claiming failure now will ensure
1052 * we perform the network exchange to deepen our history.
1053 */
1054 if (deepen)
1055 return -1;
1056 /*
1058 * check_connected() allows objects to merely be promised, but
1059 * we need all direct targets to exist.
1060 */
1061 for (r = rm; r; r = r->next) {
1062 if (!has_object_file(&r->old_oid))
1063 return -1;
1064 }
1065 opt.quiet = 1;
1067 return check_connected(iterate_ref_map, &rm, &opt);
1068}
1069static int fetch_refs(struct transport *transport, struct ref *ref_map)
1071{
1072 int ret = check_exist_and_connected(ref_map);
1073 if (ret)
1074 ret = transport_fetch_refs(transport, ref_map);
1075 if (!ret)
1076 /*
1077 * Keep the new pack's ".keep" file around to allow the caller
1078 * time to update refs to reference the new objects.
1079 */
1080 return 0;
1081 transport_unlock_pack(transport);
1082 return ret;
1083}
1084/* Update local refs based on the ref values fetched from a remote */
1086static int consume_refs(struct transport *transport, struct ref *ref_map)
1087{
1088 int connectivity_checked = transport->smart_options
1089 ? transport->smart_options->connectivity_checked : 0;
1090 int ret = store_updated_refs(transport->url,
1091 transport->remote->name,
1092 connectivity_checked,
1093 ref_map);
1094 transport_unlock_pack(transport);
1095 return ret;
1096}
1097static int prune_refs(struct refspec *rs, struct ref *ref_map,
1099 const char *raw_url)
1100{
1101 int url_len, i, result = 0;
1102 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1103 char *url;
1104 int summary_width = transport_summary_width(stale_refs);
1105 const char *dangling_msg = dry_run
1106 ? _(" (%s will become dangling)")
1107 : _(" (%s has become dangling)");
1108 if (raw_url)
1110 url = transport_anonymize_url(raw_url);
1111 else
1112 url = xstrdup("foreign");
1113 url_len = strlen(url);
1115 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1116 ;
1117 url_len = i + 1;
1119 if (4 < i && !strncmp(".git", url + i - 3, 4))
1120 url_len = i - 3;
1121 if (!dry_run) {
1123 struct string_list refnames = STRING_LIST_INIT_NODUP;
1124 for (ref = stale_refs; ref; ref = ref->next)
1126 string_list_append(&refnames, ref->name);
1127 result = delete_refs("fetch: prune", &refnames, 0);
1129 string_list_clear(&refnames, 0);
1130 }
1131 if (verbosity >= 0) {
1133 for (ref = stale_refs; ref; ref = ref->next) {
1134 struct strbuf sb = STRBUF_INIT;
1135 if (!shown_url) {
1136 fprintf(stderr, _("From %.*s\n"), url_len, url);
1137 shown_url = 1;
1138 }
1139 format_display(&sb, '-', _("[deleted]"), NULL,
1140 _("(none)"), prettify_refname(ref->name),
1141 summary_width);
1142 fprintf(stderr, " %s\n",sb.buf);
1143 strbuf_release(&sb);
1144 warn_dangling_symref(stderr, dangling_msg, ref->name);
1145 }
1146 }
1147 free(url);
1149 free_refs(stale_refs);
1150 return result;
1151}
1152static void check_not_current_branch(struct ref *ref_map)
1154{
1155 struct branch *current_branch = branch_get(NULL);
1156 if (is_bare_repository() || !current_branch)
1158 return;
1159 for (; ref_map; ref_map = ref_map->next)
1161 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1162 ref_map->peer_ref->name))
1163 die(_("Refusing to fetch into current branch %s "
1164 "of non-bare repository"), current_branch->refname);
1165}
1166static int truncate_fetch_head(void)
1168{
1169 const char *filename = git_path_fetch_head(the_repository);
1170 FILE *fp = fopen_for_writing(filename);
1171 if (!fp)
1173 return error_errno(_("cannot open %s"), filename);
1174 fclose(fp);
1175 return 0;
1176}
1177static void set_option(struct transport *transport, const char *name, const char *value)
1179{
1180 int r = transport_set_option(transport, name, value);
1181 if (r < 0)
1182 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1183 name, value, transport->url);
1184 if (r > 0)
1185 warning(_("Option \"%s\" is ignored for %s\n"),
1186 name, transport->url);
1187}
1188static int add_oid(const char *refname, const struct object_id *oid, int flags,
1191 void *cb_data)
1192{
1193 struct oid_array *oids = cb_data;
1194 oid_array_append(oids, oid);
1196 return 0;
1197}
1198static void add_negotiation_tips(struct git_transport_options *smart_options)
1200{
1201 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1202 int i;
1203 for (i = 0; i < negotiation_tip.nr; i++) {
1205 const char *s = negotiation_tip.items[i].string;
1206 int old_nr;
1207 if (!has_glob_specials(s)) {
1208 struct object_id oid;
1209 if (get_oid(s, &oid))
1210 die("%s is not a valid object", s);
1211 oid_array_append(oids, &oid);
1212 continue;
1213 }
1214 old_nr = oids->nr;
1215 for_each_glob_ref(add_oid, s, oids);
1216 if (old_nr == oids->nr)
1217 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1218 s);
1219 }
1220 smart_options->negotiation_tips = oids;
1221}
1222static struct transport *prepare_transport(struct remote *remote, int deepen)
1224{
1225 struct transport *transport;
1226 transport = transport_get(remote, NULL);
1228 transport_set_verbosity(transport, verbosity, progress);
1229 transport->family = family;
1230 if (upload_pack)
1231 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1232 if (keep)
1233 set_option(transport, TRANS_OPT_KEEP, "yes");
1234 if (depth)
1235 set_option(transport, TRANS_OPT_DEPTH, depth);
1236 if (deepen && deepen_since)
1237 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1238 if (deepen && deepen_not.nr)
1239 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1240 (const char *)&deepen_not);
1241 if (deepen_relative)
1242 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1243 if (update_shallow)
1244 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1245 if (filter_options.choice) {
1246 const char *spec =
1247 expand_list_objects_filter_spec(&filter_options);
1248 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1249 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1250 }
1251 if (negotiation_tip.nr) {
1252 if (transport->smart_options)
1253 add_negotiation_tips(transport->smart_options);
1254 else
1255 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1256 }
1257 return transport;
1258}
1259static void backfill_tags(struct transport *transport, struct ref *ref_map)
1261{
1262 int cannot_reuse;
1263 /*
1265 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1266 * when remote helper is used (setting it to an empty string
1267 * is not unsetting). We could extend the remote helper
1268 * protocol for that, but for now, just force a new connection
1269 * without deepen-since. Similar story for deepen-not.
1270 */
1271 cannot_reuse = transport->cannot_reuse ||
1272 deepen_since || deepen_not.nr;
1273 if (cannot_reuse) {
1274 gsecondary = prepare_transport(transport->remote, 0);
1275 transport = gsecondary;
1276 }
1277 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1279 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1280 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1281 if (!fetch_refs(transport, ref_map))
1282 consume_refs(transport, ref_map);
1283 if (gsecondary) {
1285 transport_disconnect(gsecondary);
1286 gsecondary = NULL;
1287 }
1288}
1289static int do_fetch(struct transport *transport,
1291 struct refspec *rs)
1292{
1293 struct ref *ref_map;
1294 int autotags = (transport->remote->fetch_tags == 1);
1295 int retcode = 0;
1296 const struct ref *remote_refs;
1297 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1298 int must_list_refs = 1;
1299 if (tags == TAGS_DEFAULT) {
1301 if (transport->remote->fetch_tags == 2)
1302 tags = TAGS_SET;
1303 if (transport->remote->fetch_tags == -1)
1304 tags = TAGS_UNSET;
1305 }
1306 /* if not appending, truncate FETCH_HEAD */
1308 if (!append && !dry_run) {
1309 retcode = truncate_fetch_head();
1310 if (retcode)
1311 goto cleanup;
1312 }
1313 if (rs->nr) {
1315 int i;
1316 refspec_ref_prefixes(rs, &ref_prefixes);
1318 /*
1320 * We can avoid listing refs if all of them are exact
1321 * OIDs
1322 */
1323 must_list_refs = 0;
1324 for (i = 0; i < rs->nr; i++) {
1325 if (!rs->items[i].exact_sha1) {
1326 must_list_refs = 1;
1327 break;
1328 }
1329 }
1330 } else if (transport->remote && transport->remote->fetch.nr)
1331 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1332 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1334 must_list_refs = 1;
1335 if (ref_prefixes.argc)
1336 argv_array_push(&ref_prefixes, "refs/tags/");
1337 }
1338 if (must_list_refs)
1340 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1341 else
1342 remote_refs = NULL;
1343 argv_array_clear(&ref_prefixes);
1345 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1347 tags, &autotags);
1348 if (!update_head_ok)
1349 check_not_current_branch(ref_map);
1350 if (tags == TAGS_DEFAULT && autotags)
1352 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1353 if (prune) {
1354 /*
1355 * We only prune based on refspecs specified
1356 * explicitly (via command line or configuration); we
1357 * don't care whether --tags was specified.
1358 */
1359 if (rs->nr) {
1360 prune_refs(rs, ref_map, transport->url);
1361 } else {
1362 prune_refs(&transport->remote->fetch,
1363 ref_map,
1364 transport->url);
1365 }
1366 }
1367 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1368 free_refs(ref_map);
1369 retcode = 1;
1370 goto cleanup;
1371 }
1372 if (set_upstream) {
1374 struct branch *branch = branch_get("HEAD");
1375 struct ref *rm;
1376 struct ref *source_ref = NULL;
1377 /*
1379 * We're setting the upstream configuration for the
1380 * current branch. The relevent upstream is the
1381 * fetched branch that is meant to be merged with the
1382 * current one, i.e. the one fetched to FETCH_HEAD.
1383 *
1384 * When there are several such branches, consider the
1385 * request ambiguous and err on the safe side by doing
1386 * nothing and just emit a warning.
1387 */
1388 for (rm = ref_map; rm; rm = rm->next) {
1389 if (!rm->peer_ref) {
1390 if (source_ref) {
1391 warning(_("multiple branch detected, incompatible with --set-upstream"));
1392 goto skip;
1393 } else {
1394 source_ref = rm;
1395 }
1396 }
1397 }
1398 if (source_ref) {
1399 if (!strcmp(source_ref->name, "HEAD") ||
1400 starts_with(source_ref->name, "refs/heads/"))
1401 install_branch_config(0,
1402 branch->name,
1403 transport->remote->name,
1404 source_ref->name);
1405 else if (starts_with(source_ref->name, "refs/remotes/"))
1406 warning(_("not setting upstream for a remote remote-tracking branch"));
1407 else if (starts_with(source_ref->name, "refs/tags/"))
1408 warning(_("not setting upstream for a remote tag"));
1409 else
1410 warning(_("unknown branch type"));
1411 } else {
1412 warning(_("no source branch found.\n"
1413 "you need to specify exactly one branch with the --set-upstream option."));
1414 }
1415 }
1416 skip:
1417 free_refs(ref_map);
1418 /* if neither --no-tags nor --tags was specified, do automated tag
1420 * following ... */
1421 if (tags == TAGS_DEFAULT && autotags) {
1422 struct ref **tail = &ref_map;
1423 ref_map = NULL;
1424 find_non_local_tags(remote_refs, &ref_map, &tail);
1425 if (ref_map)
1426 backfill_tags(transport, ref_map);
1427 free_refs(ref_map);
1428 }
1429 cleanup:
1431 return retcode;
1432}
1433static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1435{
1436 struct string_list *list = priv;
1437 if (!remote->skip_default_update)
1438 string_list_append(list, remote->name);
1439 return 0;
1440}
1441struct remote_group_data {
1443 const char *name;
1444 struct string_list *list;
1445};
1446static int get_remote_group(const char *key, const char *value, void *priv)
1448{
1449 struct remote_group_data *g = priv;
1450 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1452 /* split list by white space */
1453 while (*value) {
1454 size_t wordlen = strcspn(value, " \t\n");
1455 if (wordlen >= 1)
1457 string_list_append_nodup(g->list,
1458 xstrndup(value, wordlen));
1459 value += wordlen + (value[wordlen] != '\0');
1460 }
1461 }
1462 return 0;
1464}
1465static int add_remote_or_group(const char *name, struct string_list *list)
1467{
1468 int prev_nr = list->nr;
1469 struct remote_group_data g;
1470 g.name = name; g.list = list;
1471 git_config(get_remote_group, &g);
1473 if (list->nr == prev_nr) {
1474 struct remote *remote = remote_get(name);
1475 if (!remote_is_configured(remote, 0))
1476 return 0;
1477 string_list_append(list, remote->name);
1478 }
1479 return 1;
1480}
1481static void add_options_to_argv(struct argv_array *argv)
1483{
1484 if (dry_run)
1485 argv_array_push(argv, "--dry-run");
1486 if (prune != -1)
1487 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1488 if (prune_tags != -1)
1489 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1490 if (update_head_ok)
1491 argv_array_push(argv, "--update-head-ok");
1492 if (force)
1493 argv_array_push(argv, "--force");
1494 if (keep)
1495 argv_array_push(argv, "--keep");
1496 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1497 argv_array_push(argv, "--recurse-submodules");
1498 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1499 argv_array_push(argv, "--recurse-submodules=on-demand");
1500 if (tags == TAGS_SET)
1501 argv_array_push(argv, "--tags");
1502 else if (tags == TAGS_UNSET)
1503 argv_array_push(argv, "--no-tags");
1504 if (verbosity >= 2)
1505 argv_array_push(argv, "-v");
1506 if (verbosity >= 1)
1507 argv_array_push(argv, "-v");
1508 else if (verbosity < 0)
1509 argv_array_push(argv, "-q");
1510}
1512static int fetch_multiple(struct string_list *list)
1514{
1515 int i, result = 0;
1516 struct argv_array argv = ARGV_ARRAY_INIT;
1517 if (!append && !dry_run) {
1519 int errcode = truncate_fetch_head();
1520 if (errcode)
1521 return errcode;
1522 }
1523 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
1525 add_options_to_argv(&argv);
1526 for (i = 0; i < list->nr; i++) {
1528 const char *name = list->items[i].string;
1529 argv_array_push(&argv, name);
1530 if (verbosity >= 0)
1531 printf(_("Fetching %s\n"), name);
1532 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1533 error(_("Could not fetch %s"), name);
1534 result = 1;
1535 }
1536 argv_array_pop(&argv);
1537 }
1538 argv_array_clear(&argv);
1540 return result;
1541}
1542/*
1544 * Fetching from the promisor remote should use the given filter-spec
1545 * or inherit the default filter-spec from the config.
1546 */
1547static inline void fetch_one_setup_partial(struct remote *remote)
1548{
1549 /*
1550 * Explicit --no-filter argument overrides everything, regardless
1551 * of any prior partial clones and fetches.
1552 */
1553 if (filter_options.no_filter)
1554 return;
1555 /*
1557 * If no prior partial clone/fetch and the current fetch DID NOT
1558 * request a partial-fetch, do a normal fetch.
1559 */
1560 if (!has_promisor_remote() && !filter_options.choice)
1561 return;
1562 /*
1564 * If this is a partial-fetch request, we enable partial on
1565 * this repo if not already enabled and remember the given
1566 * filter-spec as the default for subsequent fetches to this
1567 * remote.
1568 */
1569 if (filter_options.choice) {
1570 partial_clone_register(remote->name, &filter_options);
1571 return;
1572 }
1573 /*
1575 * Do a partial-fetch from the promisor remote using either the
1576 * explicitly given filter-spec or inherit the filter-spec from
1577 * the config.
1578 */
1579 if (!filter_options.choice)
1580 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1581 return;
1582}
1583static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1585{
1586 struct refspec rs = REFSPEC_INIT_FETCH;
1587 int i;
1588 int exit_code;
1589 int maybe_prune_tags;
1590 int remote_via_config = remote_is_configured(remote, 0);
1591 if (!remote)
1593 die(_("No remote repository specified. Please, specify either a URL or a\n"
1594 "remote name from which new revisions should be fetched."));
1595 gtransport = prepare_transport(remote, 1);
1597 if (prune < 0) {
1599 /* no command line request */
1600 if (0 <= remote->prune)
1601 prune = remote->prune;
1602 else if (0 <= fetch_prune_config)
1603 prune = fetch_prune_config;
1604 else
1605 prune = PRUNE_BY_DEFAULT;
1606 }
1607 if (prune_tags < 0) {
1609 /* no command line request */
1610 if (0 <= remote->prune_tags)
1611 prune_tags = remote->prune_tags;
1612 else if (0 <= fetch_prune_tags_config)
1613 prune_tags = fetch_prune_tags_config;
1614 else
1615 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1616 }
1617 maybe_prune_tags = prune_tags_ok && prune_tags;
1619 if (maybe_prune_tags && remote_via_config)
1620 refspec_append(&remote->fetch, TAG_REFSPEC);
1621 if (maybe_prune_tags && (argc || !remote_via_config))
1623 refspec_append(&rs, TAG_REFSPEC);
1624 for (i = 0; i < argc; i++) {
1626 if (!strcmp(argv[i], "tag")) {
1627 char *tag;
1628 i++;
1629 if (i >= argc)
1630 die(_("You need to specify a tag name."));
1631 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1633 argv[i], argv[i]);
1634 refspec_append(&rs, tag);
1635 free(tag);
1636 } else {
1637 refspec_append(&rs, argv[i]);
1638 }
1639 }
1640 if (server_options.nr)
1642 gtransport->server_options = &server_options;
1643 sigchain_push_common(unlock_pack_on_signal);
1645 atexit(unlock_pack);
1646 sigchain_push(SIGPIPE, SIG_IGN);
1647 exit_code = do_fetch(gtransport, &rs);
1648 sigchain_pop(SIGPIPE);
1649 refspec_clear(&rs);
1650 transport_disconnect(gtransport);
1651 gtransport = NULL;
1652 return exit_code;
1653}
1654int cmd_fetch(int argc, const char **argv, const char *prefix)
1656{
1657 int i;
1658 struct string_list list = STRING_LIST_INIT_DUP;
1659 struct remote *remote = NULL;
1660 int result = 0;
1661 int prune_tags_ok = 1;
1662 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1663 packet_trace_identity("fetch");
1665 fetch_if_missing = 0;
1667 /* Record the command line for the reflog */
1669 strbuf_addstr(&default_rla, "fetch");
1670 for (i = 1; i < argc; i++)
1671 strbuf_addf(&default_rla, " %s", argv[i]);
1672 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1674 git_config(git_fetch_config, NULL);
1675 argc = parse_options(argc, argv, prefix,
1677 builtin_fetch_options, builtin_fetch_usage, 0);
1678 if (deepen_relative) {
1680 if (deepen_relative < 0)
1681 die(_("Negative depth in --deepen is not supported"));
1682 if (depth)
1683 die(_("--deepen and --depth are mutually exclusive"));
1684 depth = xstrfmt("%d", deepen_relative);
1685 }
1686 if (unshallow) {
1687 if (depth)
1688 die(_("--depth and --unshallow cannot be used together"));
1689 else if (!is_repository_shallow(the_repository))
1690 die(_("--unshallow on a complete repository does not make sense"));
1691 else
1692 depth = xstrfmt("%d", INFINITE_DEPTH);
1693 }
1694 /* no need to be strict, transport_set_option() will validate it again */
1696 if (depth && atoi(depth) < 1)
1697 die(_("depth %s is not a positive number"), depth);
1698 if (depth || deepen_since || deepen_not.nr)
1699 deepen = 1;
1700 if (filter_options.choice && !has_promisor_remote())
1702 die("--filter can only be used when extensions.partialClone is set");
1703 if (all) {
1705 if (argc == 1)
1706 die(_("fetch --all does not take a repository argument"));
1707 else if (argc > 1)
1708 die(_("fetch --all does not make sense with refspecs"));
1709 (void) for_each_remote(get_one_remote_for_fetch, &list);
1710 } else if (argc == 0) {
1711 /* No arguments -- use default remote */
1712 remote = remote_get(NULL);
1713 } else if (multiple) {
1714 /* All arguments are assumed to be remotes or groups */
1715 for (i = 0; i < argc; i++)
1716 if (!add_remote_or_group(argv[i], &list))
1717 die(_("No such remote or remote group: %s"), argv[i]);
1718 } else {
1719 /* Single remote or group */
1720 (void) add_remote_or_group(argv[0], &list);
1721 if (list.nr > 1) {
1722 /* More than one remote */
1723 if (argc > 1)
1724 die(_("Fetching a group and specifying refspecs does not make sense"));
1725 } else {
1726 /* Zero or one remotes */
1727 remote = remote_get(argv[0]);
1728 prune_tags_ok = (argc == 1);
1729 argc--;
1730 argv++;
1731 }
1732 }
1733 if (remote) {
1735 if (filter_options.choice || has_promisor_remote())
1736 fetch_one_setup_partial(remote);
1737 result = fetch_one(remote, argc, argv, prune_tags_ok);
1738 } else {
1739 if (filter_options.choice)
1740 die(_("--filter can only be used with the remote "
1741 "configured in extensions.partialclone"));
1742 /* TODO should this also die if we have a previous partial-clone? */
1743 result = fetch_multiple(&list);
1744 }
1745 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1747 struct argv_array options = ARGV_ARRAY_INIT;
1748 add_options_to_argv(&options);
1750 result = fetch_populated_submodules(the_repository,
1751 &options,
1752 submodule_prefix,
1753 recurse_submodules,
1754 recurse_submodules_default,
1755 verbosity < 0,
1756 max_children);
1757 argv_array_clear(&options);
1758 }
1759 string_list_clear(&list, 0);
1761 close_object_store(the_repository->objects);
1763 if (enable_auto_gc) {
1765 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1766 if (verbosity < 0)
1767 argv_array_push(&argv_gc_auto, "--quiet");
1768 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1769 argv_array_clear(&argv_gc_auto);
1770 }
1771 return result;
1773}