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[thirdparty/git.git] / builtin / fetch.c
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
27 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
28
29 static const char * const builtin_fetch_usage[] = {
30 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
31 N_("git fetch [<options>] <group>"),
32 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
33 N_("git fetch --all [<options>]"),
34 NULL
35 };
36
37 enum {
38 TAGS_UNSET = 0,
39 TAGS_DEFAULT = 1,
40 TAGS_SET = 2
41 };
42
43 static int fetch_prune_config = -1; /* unspecified */
44 static int fetch_show_forced_updates = 1;
45 static uint64_t forced_updates_ms = 0;
46 static int prune = -1; /* unspecified */
47 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
48
49 static int fetch_prune_tags_config = -1; /* unspecified */
50 static int prune_tags = -1; /* unspecified */
51 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
52
53 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
54 static int progress = -1;
55 static int enable_auto_gc = 1;
56 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
57 static int max_children = 1;
58 static enum transport_family family;
59 static const char *depth;
60 static const char *deepen_since;
61 static const char *upload_pack;
62 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
63 static struct strbuf default_rla = STRBUF_INIT;
64 static struct transport *gtransport;
65 static struct transport *gsecondary;
66 static const char *submodule_prefix = "";
67 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
68 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
69 static int shown_url = 0;
70 static struct refspec refmap = REFSPEC_INIT_FETCH;
71 static struct list_objects_filter_options filter_options;
72 static struct string_list server_options = STRING_LIST_INIT_DUP;
73 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
74
75 static int git_fetch_config(const char *k, const char *v, void *cb)
76 {
77 if (!strcmp(k, "fetch.prune")) {
78 fetch_prune_config = git_config_bool(k, v);
79 return 0;
80 }
81
82 if (!strcmp(k, "fetch.prunetags")) {
83 fetch_prune_tags_config = git_config_bool(k, v);
84 return 0;
85 }
86
87 if (!strcmp(k, "fetch.showforcedupdates")) {
88 fetch_show_forced_updates = git_config_bool(k, v);
89 return 0;
90 }
91
92 if (!strcmp(k, "submodule.recurse")) {
93 int r = git_config_bool(k, v) ?
94 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
95 recurse_submodules = r;
96 }
97
98 if (!strcmp(k, "submodule.fetchjobs")) {
99 max_children = parse_submodule_fetchjobs(k, v);
100 return 0;
101 } else if (!strcmp(k, "fetch.recursesubmodules")) {
102 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
103 return 0;
104 }
105
106 return git_default_config(k, v, cb);
107 }
108
109 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
110 {
111 BUG_ON_OPT_NEG(unset);
112
113 /*
114 * "git fetch --refmap='' origin foo"
115 * can be used to tell the command not to store anywhere
116 */
117 refspec_append(&refmap, arg);
118
119 return 0;
120 }
121
122 static struct option builtin_fetch_options[] = {
123 OPT__VERBOSITY(&verbosity),
124 OPT_BOOL(0, "all", &all,
125 N_("fetch from all remotes")),
126 OPT_BOOL('a', "append", &append,
127 N_("append to .git/FETCH_HEAD instead of overwriting")),
128 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
129 N_("path to upload pack on remote end")),
130 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
131 OPT_BOOL('m', "multiple", &multiple,
132 N_("fetch from multiple remotes")),
133 OPT_SET_INT('t', "tags", &tags,
134 N_("fetch all tags and associated objects"), TAGS_SET),
135 OPT_SET_INT('n', NULL, &tags,
136 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
137 OPT_INTEGER('j', "jobs", &max_children,
138 N_("number of submodules fetched in parallel")),
139 OPT_BOOL('p', "prune", &prune,
140 N_("prune remote-tracking branches no longer on remote")),
141 OPT_BOOL('P', "prune-tags", &prune_tags,
142 N_("prune local tags no longer on remote and clobber changed tags")),
143 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
144 N_("control recursive fetching of submodules"),
145 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
146 OPT_BOOL(0, "dry-run", &dry_run,
147 N_("dry run")),
148 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
149 OPT_BOOL('u', "update-head-ok", &update_head_ok,
150 N_("allow updating of HEAD ref")),
151 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
152 OPT_STRING(0, "depth", &depth, N_("depth"),
153 N_("deepen history of shallow clone")),
154 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
155 N_("deepen history of shallow repository based on time")),
156 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
157 N_("deepen history of shallow clone, excluding rev")),
158 OPT_INTEGER(0, "deepen", &deepen_relative,
159 N_("deepen history of shallow clone")),
160 OPT_SET_INT_F(0, "unshallow", &unshallow,
161 N_("convert to a complete repository"),
162 1, PARSE_OPT_NONEG),
163 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
164 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
165 { OPTION_CALLBACK, 0, "recurse-submodules-default",
166 &recurse_submodules_default, N_("on-demand"),
167 N_("default for recursive fetching of submodules "
168 "(lower priority than config files)"),
169 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
170 OPT_BOOL(0, "update-shallow", &update_shallow,
171 N_("accept refs that update .git/shallow")),
172 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
173 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
174 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
175 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
176 TRANSPORT_FAMILY_IPV4),
177 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
178 TRANSPORT_FAMILY_IPV6),
179 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
180 N_("report that we have only objects reachable from this object")),
181 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
182 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
183 N_("run 'gc --auto' after fetching")),
184 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
185 N_("check for forced-updates on all updated branches")),
186 OPT_END()
187 };
188
189 static void unlock_pack(void)
190 {
191 if (gtransport)
192 transport_unlock_pack(gtransport);
193 if (gsecondary)
194 transport_unlock_pack(gsecondary);
195 }
196
197 static void unlock_pack_on_signal(int signo)
198 {
199 unlock_pack();
200 sigchain_pop(signo);
201 raise(signo);
202 }
203
204 static void add_merge_config(struct ref **head,
205 const struct ref *remote_refs,
206 struct branch *branch,
207 struct ref ***tail)
208 {
209 int i;
210
211 for (i = 0; i < branch->merge_nr; i++) {
212 struct ref *rm, **old_tail = *tail;
213 struct refspec_item refspec;
214
215 for (rm = *head; rm; rm = rm->next) {
216 if (branch_merge_matches(branch, i, rm->name)) {
217 rm->fetch_head_status = FETCH_HEAD_MERGE;
218 break;
219 }
220 }
221 if (rm)
222 continue;
223
224 /*
225 * Not fetched to a remote-tracking branch? We need to fetch
226 * it anyway to allow this branch's "branch.$name.merge"
227 * to be honored by 'git pull', but we do not have to
228 * fail if branch.$name.merge is misconfigured to point
229 * at a nonexisting branch. If we were indeed called by
230 * 'git pull', it will notice the misconfiguration because
231 * there is no entry in the resulting FETCH_HEAD marked
232 * for merging.
233 */
234 memset(&refspec, 0, sizeof(refspec));
235 refspec.src = branch->merge[i]->src;
236 get_fetch_map(remote_refs, &refspec, tail, 1);
237 for (rm = *old_tail; rm; rm = rm->next)
238 rm->fetch_head_status = FETCH_HEAD_MERGE;
239 }
240 }
241
242 static int will_fetch(struct ref **head, const unsigned char *sha1)
243 {
244 struct ref *rm = *head;
245 while (rm) {
246 if (hasheq(rm->old_oid.hash, sha1))
247 return 1;
248 rm = rm->next;
249 }
250 return 0;
251 }
252
253 struct refname_hash_entry {
254 struct hashmap_entry ent; /* must be the first member */
255 struct object_id oid;
256 int ignore;
257 char refname[FLEX_ARRAY];
258 };
259
260 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
261 const void *e1_,
262 const void *e2_,
263 const void *keydata)
264 {
265 const struct refname_hash_entry *e1 = e1_;
266 const struct refname_hash_entry *e2 = e2_;
267
268 return strcmp(e1->refname, keydata ? keydata : e2->refname);
269 }
270
271 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
272 const char *refname,
273 const struct object_id *oid)
274 {
275 struct refname_hash_entry *ent;
276 size_t len = strlen(refname);
277
278 FLEX_ALLOC_MEM(ent, refname, refname, len);
279 hashmap_entry_init(ent, strhash(refname));
280 oidcpy(&ent->oid, oid);
281 hashmap_add(map, ent);
282 return ent;
283 }
284
285 static int add_one_refname(const char *refname,
286 const struct object_id *oid,
287 int flag, void *cbdata)
288 {
289 struct hashmap *refname_map = cbdata;
290
291 (void) refname_hash_add(refname_map, refname, oid);
292 return 0;
293 }
294
295 static void refname_hash_init(struct hashmap *map)
296 {
297 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
298 }
299
300 static int refname_hash_exists(struct hashmap *map, const char *refname)
301 {
302 return !!hashmap_get_from_hash(map, strhash(refname), refname);
303 }
304
305 static void clear_item(struct refname_hash_entry *item)
306 {
307 item->ignore = 1;
308 }
309
310 static void find_non_local_tags(const struct ref *refs,
311 struct ref **head,
312 struct ref ***tail)
313 {
314 struct hashmap existing_refs;
315 struct hashmap remote_refs;
316 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
317 struct string_list_item *remote_ref_item;
318 const struct ref *ref;
319 struct refname_hash_entry *item = NULL;
320
321 refname_hash_init(&existing_refs);
322 refname_hash_init(&remote_refs);
323
324 for_each_ref(add_one_refname, &existing_refs);
325 for (ref = refs; ref; ref = ref->next) {
326 if (!starts_with(ref->name, "refs/tags/"))
327 continue;
328
329 /*
330 * The peeled ref always follows the matching base
331 * ref, so if we see a peeled ref that we don't want
332 * to fetch then we can mark the ref entry in the list
333 * as one to ignore by setting util to NULL.
334 */
335 if (ends_with(ref->name, "^{}")) {
336 if (item &&
337 !has_object_file_with_flags(&ref->old_oid,
338 OBJECT_INFO_QUICK) &&
339 !will_fetch(head, ref->old_oid.hash) &&
340 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
341 !will_fetch(head, item->oid.hash))
342 clear_item(item);
343 item = NULL;
344 continue;
345 }
346
347 /*
348 * If item is non-NULL here, then we previously saw a
349 * ref not followed by a peeled reference, so we need
350 * to check if it is a lightweight tag that we want to
351 * fetch.
352 */
353 if (item &&
354 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
355 !will_fetch(head, item->oid.hash))
356 clear_item(item);
357
358 item = NULL;
359
360 /* skip duplicates and refs that we already have */
361 if (refname_hash_exists(&remote_refs, ref->name) ||
362 refname_hash_exists(&existing_refs, ref->name))
363 continue;
364
365 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
366 string_list_insert(&remote_refs_list, ref->name);
367 }
368 hashmap_free(&existing_refs, 1);
369
370 /*
371 * We may have a final lightweight tag that needs to be
372 * checked to see if it needs fetching.
373 */
374 if (item &&
375 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
376 !will_fetch(head, item->oid.hash))
377 clear_item(item);
378
379 /*
380 * For all the tags in the remote_refs_list,
381 * add them to the list of refs to be fetched
382 */
383 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
384 const char *refname = remote_ref_item->string;
385 struct ref *rm;
386
387 item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
388 if (!item)
389 BUG("unseen remote ref?");
390
391 /* Unless we have already decided to ignore this item... */
392 if (item->ignore)
393 continue;
394
395 rm = alloc_ref(item->refname);
396 rm->peer_ref = alloc_ref(item->refname);
397 oidcpy(&rm->old_oid, &item->oid);
398 **tail = rm;
399 *tail = &rm->next;
400 }
401 hashmap_free(&remote_refs, 1);
402 string_list_clear(&remote_refs_list, 0);
403 }
404
405 static struct ref *get_ref_map(struct remote *remote,
406 const struct ref *remote_refs,
407 struct refspec *rs,
408 int tags, int *autotags)
409 {
410 int i;
411 struct ref *rm;
412 struct ref *ref_map = NULL;
413 struct ref **tail = &ref_map;
414
415 /* opportunistically-updated references: */
416 struct ref *orefs = NULL, **oref_tail = &orefs;
417
418 struct hashmap existing_refs;
419
420 if (rs->nr) {
421 struct refspec *fetch_refspec;
422
423 for (i = 0; i < rs->nr; i++) {
424 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
425 if (rs->items[i].dst && rs->items[i].dst[0])
426 *autotags = 1;
427 }
428 /* Merge everything on the command line (but not --tags) */
429 for (rm = ref_map; rm; rm = rm->next)
430 rm->fetch_head_status = FETCH_HEAD_MERGE;
431
432 /*
433 * For any refs that we happen to be fetching via
434 * command-line arguments, the destination ref might
435 * have been missing or have been different than the
436 * remote-tracking ref that would be derived from the
437 * configured refspec. In these cases, we want to
438 * take the opportunity to update their configured
439 * remote-tracking reference. However, we do not want
440 * to mention these entries in FETCH_HEAD at all, as
441 * they would simply be duplicates of existing
442 * entries, so we set them FETCH_HEAD_IGNORE below.
443 *
444 * We compute these entries now, based only on the
445 * refspecs specified on the command line. But we add
446 * them to the list following the refspecs resulting
447 * from the tags option so that one of the latter,
448 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
449 * by ref_remove_duplicates() in favor of one of these
450 * opportunistic entries with FETCH_HEAD_IGNORE.
451 */
452 if (refmap.nr)
453 fetch_refspec = &refmap;
454 else
455 fetch_refspec = &remote->fetch;
456
457 for (i = 0; i < fetch_refspec->nr; i++)
458 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
459 } else if (refmap.nr) {
460 die("--refmap option is only meaningful with command-line refspec(s).");
461 } else {
462 /* Use the defaults */
463 struct branch *branch = branch_get(NULL);
464 int has_merge = branch_has_merge_config(branch);
465 if (remote &&
466 (remote->fetch.nr ||
467 /* Note: has_merge implies non-NULL branch->remote_name */
468 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
469 for (i = 0; i < remote->fetch.nr; i++) {
470 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
471 if (remote->fetch.items[i].dst &&
472 remote->fetch.items[i].dst[0])
473 *autotags = 1;
474 if (!i && !has_merge && ref_map &&
475 !remote->fetch.items[0].pattern)
476 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
477 }
478 /*
479 * if the remote we're fetching from is the same
480 * as given in branch.<name>.remote, we add the
481 * ref given in branch.<name>.merge, too.
482 *
483 * Note: has_merge implies non-NULL branch->remote_name
484 */
485 if (has_merge &&
486 !strcmp(branch->remote_name, remote->name))
487 add_merge_config(&ref_map, remote_refs, branch, &tail);
488 } else {
489 ref_map = get_remote_ref(remote_refs, "HEAD");
490 if (!ref_map)
491 die(_("Couldn't find remote ref HEAD"));
492 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
493 tail = &ref_map->next;
494 }
495 }
496
497 if (tags == TAGS_SET)
498 /* also fetch all tags */
499 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
500 else if (tags == TAGS_DEFAULT && *autotags)
501 find_non_local_tags(remote_refs, &ref_map, &tail);
502
503 /* Now append any refs to be updated opportunistically: */
504 *tail = orefs;
505 for (rm = orefs; rm; rm = rm->next) {
506 rm->fetch_head_status = FETCH_HEAD_IGNORE;
507 tail = &rm->next;
508 }
509
510 ref_map = ref_remove_duplicates(ref_map);
511
512 refname_hash_init(&existing_refs);
513 for_each_ref(add_one_refname, &existing_refs);
514
515 for (rm = ref_map; rm; rm = rm->next) {
516 if (rm->peer_ref) {
517 const char *refname = rm->peer_ref->name;
518 struct refname_hash_entry *peer_item;
519
520 peer_item = hashmap_get_from_hash(&existing_refs,
521 strhash(refname),
522 refname);
523 if (peer_item) {
524 struct object_id *old_oid = &peer_item->oid;
525 oidcpy(&rm->peer_ref->old_oid, old_oid);
526 }
527 }
528 }
529 hashmap_free(&existing_refs, 1);
530
531 return ref_map;
532 }
533
534 #define STORE_REF_ERROR_OTHER 1
535 #define STORE_REF_ERROR_DF_CONFLICT 2
536
537 static int s_update_ref(const char *action,
538 struct ref *ref,
539 int check_old)
540 {
541 char *msg;
542 char *rla = getenv("GIT_REFLOG_ACTION");
543 struct ref_transaction *transaction;
544 struct strbuf err = STRBUF_INIT;
545 int ret, df_conflict = 0;
546
547 if (dry_run)
548 return 0;
549 if (!rla)
550 rla = default_rla.buf;
551 msg = xstrfmt("%s: %s", rla, action);
552
553 transaction = ref_transaction_begin(&err);
554 if (!transaction ||
555 ref_transaction_update(transaction, ref->name,
556 &ref->new_oid,
557 check_old ? &ref->old_oid : NULL,
558 0, msg, &err))
559 goto fail;
560
561 ret = ref_transaction_commit(transaction, &err);
562 if (ret) {
563 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
564 goto fail;
565 }
566
567 ref_transaction_free(transaction);
568 strbuf_release(&err);
569 free(msg);
570 return 0;
571 fail:
572 ref_transaction_free(transaction);
573 error("%s", err.buf);
574 strbuf_release(&err);
575 free(msg);
576 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
577 : STORE_REF_ERROR_OTHER;
578 }
579
580 static int refcol_width = 10;
581 static int compact_format;
582
583 static void adjust_refcol_width(const struct ref *ref)
584 {
585 int max, rlen, llen, len;
586
587 /* uptodate lines are only shown on high verbosity level */
588 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
589 return;
590
591 max = term_columns();
592 rlen = utf8_strwidth(prettify_refname(ref->name));
593
594 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
595
596 /*
597 * rough estimation to see if the output line is too long and
598 * should not be counted (we can't do precise calculation
599 * anyway because we don't know if the error explanation part
600 * will be printed in update_local_ref)
601 */
602 if (compact_format) {
603 llen = 0;
604 max = max * 2 / 3;
605 }
606 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
607 if (len >= max)
608 return;
609
610 /*
611 * Not precise calculation for compact mode because '*' can
612 * appear on the left hand side of '->' and shrink the column
613 * back.
614 */
615 if (refcol_width < rlen)
616 refcol_width = rlen;
617 }
618
619 static void prepare_format_display(struct ref *ref_map)
620 {
621 struct ref *rm;
622 const char *format = "full";
623
624 git_config_get_string_const("fetch.output", &format);
625 if (!strcasecmp(format, "full"))
626 compact_format = 0;
627 else if (!strcasecmp(format, "compact"))
628 compact_format = 1;
629 else
630 die(_("configuration fetch.output contains invalid value %s"),
631 format);
632
633 for (rm = ref_map; rm; rm = rm->next) {
634 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
635 !rm->peer_ref ||
636 !strcmp(rm->name, "HEAD"))
637 continue;
638
639 adjust_refcol_width(rm);
640 }
641 }
642
643 static void print_remote_to_local(struct strbuf *display,
644 const char *remote, const char *local)
645 {
646 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
647 }
648
649 static int find_and_replace(struct strbuf *haystack,
650 const char *needle,
651 const char *placeholder)
652 {
653 const char *p = NULL;
654 int plen, nlen;
655
656 nlen = strlen(needle);
657 if (ends_with(haystack->buf, needle))
658 p = haystack->buf + haystack->len - nlen;
659 else
660 p = strstr(haystack->buf, needle);
661 if (!p)
662 return 0;
663
664 if (p > haystack->buf && p[-1] != '/')
665 return 0;
666
667 plen = strlen(p);
668 if (plen > nlen && p[nlen] != '/')
669 return 0;
670
671 strbuf_splice(haystack, p - haystack->buf, nlen,
672 placeholder, strlen(placeholder));
673 return 1;
674 }
675
676 static void print_compact(struct strbuf *display,
677 const char *remote, const char *local)
678 {
679 struct strbuf r = STRBUF_INIT;
680 struct strbuf l = STRBUF_INIT;
681
682 if (!strcmp(remote, local)) {
683 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
684 return;
685 }
686
687 strbuf_addstr(&r, remote);
688 strbuf_addstr(&l, local);
689
690 if (!find_and_replace(&r, local, "*"))
691 find_and_replace(&l, remote, "*");
692 print_remote_to_local(display, r.buf, l.buf);
693
694 strbuf_release(&r);
695 strbuf_release(&l);
696 }
697
698 static void format_display(struct strbuf *display, char code,
699 const char *summary, const char *error,
700 const char *remote, const char *local,
701 int summary_width)
702 {
703 int width = (summary_width + strlen(summary) - gettext_width(summary));
704
705 strbuf_addf(display, "%c %-*s ", code, width, summary);
706 if (!compact_format)
707 print_remote_to_local(display, remote, local);
708 else
709 print_compact(display, remote, local);
710 if (error)
711 strbuf_addf(display, " (%s)", error);
712 }
713
714 static int update_local_ref(struct ref *ref,
715 const char *remote,
716 const struct ref *remote_ref,
717 struct strbuf *display,
718 int summary_width)
719 {
720 struct commit *current = NULL, *updated;
721 enum object_type type;
722 struct branch *current_branch = branch_get(NULL);
723 const char *pretty_ref = prettify_refname(ref->name);
724 int fast_forward = 0;
725
726 type = oid_object_info(the_repository, &ref->new_oid, NULL);
727 if (type < 0)
728 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
729
730 if (oideq(&ref->old_oid, &ref->new_oid)) {
731 if (verbosity > 0)
732 format_display(display, '=', _("[up to date]"), NULL,
733 remote, pretty_ref, summary_width);
734 return 0;
735 }
736
737 if (current_branch &&
738 !strcmp(ref->name, current_branch->name) &&
739 !(update_head_ok || is_bare_repository()) &&
740 !is_null_oid(&ref->old_oid)) {
741 /*
742 * If this is the head, and it's not okay to update
743 * the head, and the old value of the head isn't empty...
744 */
745 format_display(display, '!', _("[rejected]"),
746 _("can't fetch in current branch"),
747 remote, pretty_ref, summary_width);
748 return 1;
749 }
750
751 if (!is_null_oid(&ref->old_oid) &&
752 starts_with(ref->name, "refs/tags/")) {
753 if (force || ref->force) {
754 int r;
755 r = s_update_ref("updating tag", ref, 0);
756 format_display(display, r ? '!' : 't', _("[tag update]"),
757 r ? _("unable to update local ref") : NULL,
758 remote, pretty_ref, summary_width);
759 return r;
760 } else {
761 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
762 remote, pretty_ref, summary_width);
763 return 1;
764 }
765 }
766
767 current = lookup_commit_reference_gently(the_repository,
768 &ref->old_oid, 1);
769 updated = lookup_commit_reference_gently(the_repository,
770 &ref->new_oid, 1);
771 if (!current || !updated) {
772 const char *msg;
773 const char *what;
774 int r;
775 /*
776 * Nicely describe the new ref we're fetching.
777 * Base this on the remote's ref name, as it's
778 * more likely to follow a standard layout.
779 */
780 const char *name = remote_ref ? remote_ref->name : "";
781 if (starts_with(name, "refs/tags/")) {
782 msg = "storing tag";
783 what = _("[new tag]");
784 } else if (starts_with(name, "refs/heads/")) {
785 msg = "storing head";
786 what = _("[new branch]");
787 } else {
788 msg = "storing ref";
789 what = _("[new ref]");
790 }
791
792 r = s_update_ref(msg, ref, 0);
793 format_display(display, r ? '!' : '*', what,
794 r ? _("unable to update local ref") : NULL,
795 remote, pretty_ref, summary_width);
796 return r;
797 }
798
799 if (fetch_show_forced_updates) {
800 uint64_t t_before = getnanotime();
801 fast_forward = in_merge_bases(current, updated);
802 forced_updates_ms += (getnanotime() - t_before) / 1000000;
803 } else {
804 fast_forward = 1;
805 }
806
807 if (fast_forward) {
808 struct strbuf quickref = STRBUF_INIT;
809 int r;
810
811 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
812 strbuf_addstr(&quickref, "..");
813 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
814 r = s_update_ref("fast-forward", ref, 1);
815 format_display(display, r ? '!' : ' ', quickref.buf,
816 r ? _("unable to update local ref") : NULL,
817 remote, pretty_ref, summary_width);
818 strbuf_release(&quickref);
819 return r;
820 } else if (force || ref->force) {
821 struct strbuf quickref = STRBUF_INIT;
822 int r;
823 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
824 strbuf_addstr(&quickref, "...");
825 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
826 r = s_update_ref("forced-update", ref, 1);
827 format_display(display, r ? '!' : '+', quickref.buf,
828 r ? _("unable to update local ref") : _("forced update"),
829 remote, pretty_ref, summary_width);
830 strbuf_release(&quickref);
831 return r;
832 } else {
833 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
834 remote, pretty_ref, summary_width);
835 return 1;
836 }
837 }
838
839 static int iterate_ref_map(void *cb_data, struct object_id *oid)
840 {
841 struct ref **rm = cb_data;
842 struct ref *ref = *rm;
843
844 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
845 ref = ref->next;
846 if (!ref)
847 return -1; /* end of the list */
848 *rm = ref->next;
849 oidcpy(oid, &ref->old_oid);
850 return 0;
851 }
852
853 static int store_updated_refs(const char *raw_url, const char *remote_name,
854 int connectivity_checked, struct ref *ref_map)
855 {
856 FILE *fp;
857 struct commit *commit;
858 int url_len, i, rc = 0;
859 struct strbuf note = STRBUF_INIT;
860 const char *what, *kind;
861 struct ref *rm;
862 char *url;
863 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
864 int want_status;
865 int summary_width = transport_summary_width(ref_map);
866
867 fp = fopen(filename, "a");
868 if (!fp)
869 return error_errno(_("cannot open %s"), filename);
870
871 if (raw_url)
872 url = transport_anonymize_url(raw_url);
873 else
874 url = xstrdup("foreign");
875
876 if (!connectivity_checked) {
877 rm = ref_map;
878 if (check_connected(iterate_ref_map, &rm, NULL)) {
879 rc = error(_("%s did not send all necessary objects\n"), url);
880 goto abort;
881 }
882 }
883
884 prepare_format_display(ref_map);
885
886 /*
887 * We do a pass for each fetch_head_status type in their enum order, so
888 * merged entries are written before not-for-merge. That lets readers
889 * use FETCH_HEAD as a refname to refer to the ref to be merged.
890 */
891 for (want_status = FETCH_HEAD_MERGE;
892 want_status <= FETCH_HEAD_IGNORE;
893 want_status++) {
894 for (rm = ref_map; rm; rm = rm->next) {
895 struct ref *ref = NULL;
896 const char *merge_status_marker = "";
897
898 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
899 if (want_status == FETCH_HEAD_MERGE)
900 warning(_("reject %s because shallow roots are not allowed to be updated"),
901 rm->peer_ref ? rm->peer_ref->name : rm->name);
902 continue;
903 }
904
905 commit = lookup_commit_reference_gently(the_repository,
906 &rm->old_oid,
907 1);
908 if (!commit)
909 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
910
911 if (rm->fetch_head_status != want_status)
912 continue;
913
914 if (rm->peer_ref) {
915 ref = alloc_ref(rm->peer_ref->name);
916 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
917 oidcpy(&ref->new_oid, &rm->old_oid);
918 ref->force = rm->peer_ref->force;
919 }
920
921 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
922 check_for_new_submodule_commits(&rm->old_oid);
923
924 if (!strcmp(rm->name, "HEAD")) {
925 kind = "";
926 what = "";
927 }
928 else if (starts_with(rm->name, "refs/heads/")) {
929 kind = "branch";
930 what = rm->name + 11;
931 }
932 else if (starts_with(rm->name, "refs/tags/")) {
933 kind = "tag";
934 what = rm->name + 10;
935 }
936 else if (starts_with(rm->name, "refs/remotes/")) {
937 kind = "remote-tracking branch";
938 what = rm->name + 13;
939 }
940 else {
941 kind = "";
942 what = rm->name;
943 }
944
945 url_len = strlen(url);
946 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
947 ;
948 url_len = i + 1;
949 if (4 < i && !strncmp(".git", url + i - 3, 4))
950 url_len = i - 3;
951
952 strbuf_reset(&note);
953 if (*what) {
954 if (*kind)
955 strbuf_addf(&note, "%s ", kind);
956 strbuf_addf(&note, "'%s' of ", what);
957 }
958 switch (rm->fetch_head_status) {
959 case FETCH_HEAD_NOT_FOR_MERGE:
960 merge_status_marker = "not-for-merge";
961 /* fall-through */
962 case FETCH_HEAD_MERGE:
963 fprintf(fp, "%s\t%s\t%s",
964 oid_to_hex(&rm->old_oid),
965 merge_status_marker,
966 note.buf);
967 for (i = 0; i < url_len; ++i)
968 if ('\n' == url[i])
969 fputs("\\n", fp);
970 else
971 fputc(url[i], fp);
972 fputc('\n', fp);
973 break;
974 default:
975 /* do not write anything to FETCH_HEAD */
976 break;
977 }
978
979 strbuf_reset(&note);
980 if (ref) {
981 rc |= update_local_ref(ref, what, rm, &note,
982 summary_width);
983 free(ref);
984 } else
985 format_display(&note, '*',
986 *kind ? kind : "branch", NULL,
987 *what ? what : "HEAD",
988 "FETCH_HEAD", summary_width);
989 if (note.len) {
990 if (verbosity >= 0 && !shown_url) {
991 fprintf(stderr, _("From %.*s\n"),
992 url_len, url);
993 shown_url = 1;
994 }
995 if (verbosity >= 0)
996 fprintf(stderr, " %s\n", note.buf);
997 }
998 }
999 }
1000
1001 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1002 error(_("some local refs could not be updated; try running\n"
1003 " 'git remote prune %s' to remove any old, conflicting "
1004 "branches"), remote_name);
1005
1006 if (advice_fetch_show_forced_updates) {
1007 if (!fetch_show_forced_updates) {
1008 warning(_("Fetch normally indicates which branches had a forced update, but that check has been disabled."));
1009 warning(_("To re-enable, use '--show-forced-updates' flag or run 'git config fetch.showForcedUpdates true'."));
1010 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1011 warning(_("It took %.2f seconds to check forced updates. You can use '--no-show-forced-updates'\n"),
1012 forced_updates_ms / 1000.0);
1013 warning(_("or run 'git config fetch.showForcedUpdates false' to avoid this check.\n"));
1014 }
1015 }
1016
1017 abort:
1018 strbuf_release(&note);
1019 free(url);
1020 fclose(fp);
1021 return rc;
1022 }
1023
1024 /*
1025 * We would want to bypass the object transfer altogether if
1026 * everything we are going to fetch already exists and is connected
1027 * locally.
1028 */
1029 static int check_exist_and_connected(struct ref *ref_map)
1030 {
1031 struct ref *rm = ref_map;
1032 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1033 struct ref *r;
1034
1035 /*
1036 * If we are deepening a shallow clone we already have these
1037 * objects reachable. Running rev-list here will return with
1038 * a good (0) exit status and we'll bypass the fetch that we
1039 * really need to perform. Claiming failure now will ensure
1040 * we perform the network exchange to deepen our history.
1041 */
1042 if (deepen)
1043 return -1;
1044
1045 /*
1046 * check_connected() allows objects to merely be promised, but
1047 * we need all direct targets to exist.
1048 */
1049 for (r = rm; r; r = r->next) {
1050 if (!has_object_file(&r->old_oid))
1051 return -1;
1052 }
1053
1054 opt.quiet = 1;
1055 return check_connected(iterate_ref_map, &rm, &opt);
1056 }
1057
1058 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1059 {
1060 int ret = check_exist_and_connected(ref_map);
1061 if (ret)
1062 ret = transport_fetch_refs(transport, ref_map);
1063 if (!ret)
1064 /*
1065 * Keep the new pack's ".keep" file around to allow the caller
1066 * time to update refs to reference the new objects.
1067 */
1068 return 0;
1069 transport_unlock_pack(transport);
1070 return ret;
1071 }
1072
1073 /* Update local refs based on the ref values fetched from a remote */
1074 static int consume_refs(struct transport *transport, struct ref *ref_map)
1075 {
1076 int connectivity_checked = transport->smart_options
1077 ? transport->smart_options->connectivity_checked : 0;
1078 int ret = store_updated_refs(transport->url,
1079 transport->remote->name,
1080 connectivity_checked,
1081 ref_map);
1082 transport_unlock_pack(transport);
1083 return ret;
1084 }
1085
1086 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1087 const char *raw_url)
1088 {
1089 int url_len, i, result = 0;
1090 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1091 char *url;
1092 int summary_width = transport_summary_width(stale_refs);
1093 const char *dangling_msg = dry_run
1094 ? _(" (%s will become dangling)")
1095 : _(" (%s has become dangling)");
1096
1097 if (raw_url)
1098 url = transport_anonymize_url(raw_url);
1099 else
1100 url = xstrdup("foreign");
1101
1102 url_len = strlen(url);
1103 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1104 ;
1105
1106 url_len = i + 1;
1107 if (4 < i && !strncmp(".git", url + i - 3, 4))
1108 url_len = i - 3;
1109
1110 if (!dry_run) {
1111 struct string_list refnames = STRING_LIST_INIT_NODUP;
1112
1113 for (ref = stale_refs; ref; ref = ref->next)
1114 string_list_append(&refnames, ref->name);
1115
1116 result = delete_refs("fetch: prune", &refnames, 0);
1117 string_list_clear(&refnames, 0);
1118 }
1119
1120 if (verbosity >= 0) {
1121 for (ref = stale_refs; ref; ref = ref->next) {
1122 struct strbuf sb = STRBUF_INIT;
1123 if (!shown_url) {
1124 fprintf(stderr, _("From %.*s\n"), url_len, url);
1125 shown_url = 1;
1126 }
1127 format_display(&sb, '-', _("[deleted]"), NULL,
1128 _("(none)"), prettify_refname(ref->name),
1129 summary_width);
1130 fprintf(stderr, " %s\n",sb.buf);
1131 strbuf_release(&sb);
1132 warn_dangling_symref(stderr, dangling_msg, ref->name);
1133 }
1134 }
1135
1136 free(url);
1137 free_refs(stale_refs);
1138 return result;
1139 }
1140
1141 static void check_not_current_branch(struct ref *ref_map)
1142 {
1143 struct branch *current_branch = branch_get(NULL);
1144
1145 if (is_bare_repository() || !current_branch)
1146 return;
1147
1148 for (; ref_map; ref_map = ref_map->next)
1149 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1150 ref_map->peer_ref->name))
1151 die(_("Refusing to fetch into current branch %s "
1152 "of non-bare repository"), current_branch->refname);
1153 }
1154
1155 static int truncate_fetch_head(void)
1156 {
1157 const char *filename = git_path_fetch_head(the_repository);
1158 FILE *fp = fopen_for_writing(filename);
1159
1160 if (!fp)
1161 return error_errno(_("cannot open %s"), filename);
1162 fclose(fp);
1163 return 0;
1164 }
1165
1166 static void set_option(struct transport *transport, const char *name, const char *value)
1167 {
1168 int r = transport_set_option(transport, name, value);
1169 if (r < 0)
1170 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1171 name, value, transport->url);
1172 if (r > 0)
1173 warning(_("Option \"%s\" is ignored for %s\n"),
1174 name, transport->url);
1175 }
1176
1177
1178 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1179 void *cb_data)
1180 {
1181 struct oid_array *oids = cb_data;
1182
1183 oid_array_append(oids, oid);
1184 return 0;
1185 }
1186
1187 static void add_negotiation_tips(struct git_transport_options *smart_options)
1188 {
1189 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1190 int i;
1191
1192 for (i = 0; i < negotiation_tip.nr; i++) {
1193 const char *s = negotiation_tip.items[i].string;
1194 int old_nr;
1195 if (!has_glob_specials(s)) {
1196 struct object_id oid;
1197 if (get_oid(s, &oid))
1198 die("%s is not a valid object", s);
1199 oid_array_append(oids, &oid);
1200 continue;
1201 }
1202 old_nr = oids->nr;
1203 for_each_glob_ref(add_oid, s, oids);
1204 if (old_nr == oids->nr)
1205 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1206 s);
1207 }
1208 smart_options->negotiation_tips = oids;
1209 }
1210
1211 static struct transport *prepare_transport(struct remote *remote, int deepen)
1212 {
1213 struct transport *transport;
1214
1215 transport = transport_get(remote, NULL);
1216 transport_set_verbosity(transport, verbosity, progress);
1217 transport->family = family;
1218 if (upload_pack)
1219 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1220 if (keep)
1221 set_option(transport, TRANS_OPT_KEEP, "yes");
1222 if (depth)
1223 set_option(transport, TRANS_OPT_DEPTH, depth);
1224 if (deepen && deepen_since)
1225 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1226 if (deepen && deepen_not.nr)
1227 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1228 (const char *)&deepen_not);
1229 if (deepen_relative)
1230 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1231 if (update_shallow)
1232 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1233 if (filter_options.choice) {
1234 struct strbuf expanded_filter_spec = STRBUF_INIT;
1235 expand_list_objects_filter_spec(&filter_options,
1236 &expanded_filter_spec);
1237 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1238 expanded_filter_spec.buf);
1239 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1240 strbuf_release(&expanded_filter_spec);
1241 }
1242 if (negotiation_tip.nr) {
1243 if (transport->smart_options)
1244 add_negotiation_tips(transport->smart_options);
1245 else
1246 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1247 }
1248 return transport;
1249 }
1250
1251 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1252 {
1253 int cannot_reuse;
1254
1255 /*
1256 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1257 * when remote helper is used (setting it to an empty string
1258 * is not unsetting). We could extend the remote helper
1259 * protocol for that, but for now, just force a new connection
1260 * without deepen-since. Similar story for deepen-not.
1261 */
1262 cannot_reuse = transport->cannot_reuse ||
1263 deepen_since || deepen_not.nr;
1264 if (cannot_reuse) {
1265 gsecondary = prepare_transport(transport->remote, 0);
1266 transport = gsecondary;
1267 }
1268
1269 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1270 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1271 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1272 if (!fetch_refs(transport, ref_map))
1273 consume_refs(transport, ref_map);
1274
1275 if (gsecondary) {
1276 transport_disconnect(gsecondary);
1277 gsecondary = NULL;
1278 }
1279 }
1280
1281 static int do_fetch(struct transport *transport,
1282 struct refspec *rs)
1283 {
1284 struct ref *ref_map;
1285 int autotags = (transport->remote->fetch_tags == 1);
1286 int retcode = 0;
1287 const struct ref *remote_refs;
1288 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1289 int must_list_refs = 1;
1290
1291 if (tags == TAGS_DEFAULT) {
1292 if (transport->remote->fetch_tags == 2)
1293 tags = TAGS_SET;
1294 if (transport->remote->fetch_tags == -1)
1295 tags = TAGS_UNSET;
1296 }
1297
1298 /* if not appending, truncate FETCH_HEAD */
1299 if (!append && !dry_run) {
1300 retcode = truncate_fetch_head();
1301 if (retcode)
1302 goto cleanup;
1303 }
1304
1305 if (rs->nr) {
1306 int i;
1307
1308 refspec_ref_prefixes(rs, &ref_prefixes);
1309
1310 /*
1311 * We can avoid listing refs if all of them are exact
1312 * OIDs
1313 */
1314 must_list_refs = 0;
1315 for (i = 0; i < rs->nr; i++) {
1316 if (!rs->items[i].exact_sha1) {
1317 must_list_refs = 1;
1318 break;
1319 }
1320 }
1321 } else if (transport->remote && transport->remote->fetch.nr)
1322 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1323
1324 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1325 must_list_refs = 1;
1326 if (ref_prefixes.argc)
1327 argv_array_push(&ref_prefixes, "refs/tags/");
1328 }
1329
1330 if (must_list_refs)
1331 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1332 else
1333 remote_refs = NULL;
1334
1335 argv_array_clear(&ref_prefixes);
1336
1337 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1338 tags, &autotags);
1339 if (!update_head_ok)
1340 check_not_current_branch(ref_map);
1341
1342 if (tags == TAGS_DEFAULT && autotags)
1343 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1344 if (prune) {
1345 /*
1346 * We only prune based on refspecs specified
1347 * explicitly (via command line or configuration); we
1348 * don't care whether --tags was specified.
1349 */
1350 if (rs->nr) {
1351 prune_refs(rs, ref_map, transport->url);
1352 } else {
1353 prune_refs(&transport->remote->fetch,
1354 ref_map,
1355 transport->url);
1356 }
1357 }
1358 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1359 free_refs(ref_map);
1360 retcode = 1;
1361 goto cleanup;
1362 }
1363 free_refs(ref_map);
1364
1365 /* if neither --no-tags nor --tags was specified, do automated tag
1366 * following ... */
1367 if (tags == TAGS_DEFAULT && autotags) {
1368 struct ref **tail = &ref_map;
1369 ref_map = NULL;
1370 find_non_local_tags(remote_refs, &ref_map, &tail);
1371 if (ref_map)
1372 backfill_tags(transport, ref_map);
1373 free_refs(ref_map);
1374 }
1375
1376 cleanup:
1377 return retcode;
1378 }
1379
1380 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1381 {
1382 struct string_list *list = priv;
1383 if (!remote->skip_default_update)
1384 string_list_append(list, remote->name);
1385 return 0;
1386 }
1387
1388 struct remote_group_data {
1389 const char *name;
1390 struct string_list *list;
1391 };
1392
1393 static int get_remote_group(const char *key, const char *value, void *priv)
1394 {
1395 struct remote_group_data *g = priv;
1396
1397 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1398 /* split list by white space */
1399 while (*value) {
1400 size_t wordlen = strcspn(value, " \t\n");
1401
1402 if (wordlen >= 1)
1403 string_list_append_nodup(g->list,
1404 xstrndup(value, wordlen));
1405 value += wordlen + (value[wordlen] != '\0');
1406 }
1407 }
1408
1409 return 0;
1410 }
1411
1412 static int add_remote_or_group(const char *name, struct string_list *list)
1413 {
1414 int prev_nr = list->nr;
1415 struct remote_group_data g;
1416 g.name = name; g.list = list;
1417
1418 git_config(get_remote_group, &g);
1419 if (list->nr == prev_nr) {
1420 struct remote *remote = remote_get(name);
1421 if (!remote_is_configured(remote, 0))
1422 return 0;
1423 string_list_append(list, remote->name);
1424 }
1425 return 1;
1426 }
1427
1428 static void add_options_to_argv(struct argv_array *argv)
1429 {
1430 if (dry_run)
1431 argv_array_push(argv, "--dry-run");
1432 if (prune != -1)
1433 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1434 if (prune_tags != -1)
1435 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1436 if (update_head_ok)
1437 argv_array_push(argv, "--update-head-ok");
1438 if (force)
1439 argv_array_push(argv, "--force");
1440 if (keep)
1441 argv_array_push(argv, "--keep");
1442 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1443 argv_array_push(argv, "--recurse-submodules");
1444 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1445 argv_array_push(argv, "--recurse-submodules=on-demand");
1446 if (tags == TAGS_SET)
1447 argv_array_push(argv, "--tags");
1448 else if (tags == TAGS_UNSET)
1449 argv_array_push(argv, "--no-tags");
1450 if (verbosity >= 2)
1451 argv_array_push(argv, "-v");
1452 if (verbosity >= 1)
1453 argv_array_push(argv, "-v");
1454 else if (verbosity < 0)
1455 argv_array_push(argv, "-q");
1456
1457 }
1458
1459 static int fetch_multiple(struct string_list *list)
1460 {
1461 int i, result = 0;
1462 struct argv_array argv = ARGV_ARRAY_INIT;
1463
1464 if (!append && !dry_run) {
1465 int errcode = truncate_fetch_head();
1466 if (errcode)
1467 return errcode;
1468 }
1469
1470 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
1471 add_options_to_argv(&argv);
1472
1473 for (i = 0; i < list->nr; i++) {
1474 const char *name = list->items[i].string;
1475 argv_array_push(&argv, name);
1476 if (verbosity >= 0)
1477 printf(_("Fetching %s\n"), name);
1478 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1479 error(_("Could not fetch %s"), name);
1480 result = 1;
1481 }
1482 argv_array_pop(&argv);
1483 }
1484
1485 argv_array_clear(&argv);
1486 return result;
1487 }
1488
1489 /*
1490 * Fetching from the promisor remote should use the given filter-spec
1491 * or inherit the default filter-spec from the config.
1492 */
1493 static inline void fetch_one_setup_partial(struct remote *remote)
1494 {
1495 /*
1496 * Explicit --no-filter argument overrides everything, regardless
1497 * of any prior partial clones and fetches.
1498 */
1499 if (filter_options.no_filter)
1500 return;
1501
1502 /*
1503 * If no prior partial clone/fetch and the current fetch DID NOT
1504 * request a partial-fetch, do a normal fetch.
1505 */
1506 if (!repository_format_partial_clone && !filter_options.choice)
1507 return;
1508
1509 /*
1510 * If this is the FIRST partial-fetch request, we enable partial
1511 * on this repo and remember the given filter-spec as the default
1512 * for subsequent fetches to this remote.
1513 */
1514 if (!repository_format_partial_clone && filter_options.choice) {
1515 partial_clone_register(remote->name, &filter_options);
1516 return;
1517 }
1518
1519 /*
1520 * We are currently limited to only ONE promisor remote and only
1521 * allow partial-fetches from the promisor remote.
1522 */
1523 if (strcmp(remote->name, repository_format_partial_clone)) {
1524 if (filter_options.choice)
1525 die(_("--filter can only be used with the remote "
1526 "configured in extensions.partialClone"));
1527 return;
1528 }
1529
1530 /*
1531 * Do a partial-fetch from the promisor remote using either the
1532 * explicitly given filter-spec or inherit the filter-spec from
1533 * the config.
1534 */
1535 if (!filter_options.choice)
1536 partial_clone_get_default_filter_spec(&filter_options);
1537 return;
1538 }
1539
1540 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1541 {
1542 struct refspec rs = REFSPEC_INIT_FETCH;
1543 int i;
1544 int exit_code;
1545 int maybe_prune_tags;
1546 int remote_via_config = remote_is_configured(remote, 0);
1547
1548 if (!remote)
1549 die(_("No remote repository specified. Please, specify either a URL or a\n"
1550 "remote name from which new revisions should be fetched."));
1551
1552 gtransport = prepare_transport(remote, 1);
1553
1554 if (prune < 0) {
1555 /* no command line request */
1556 if (0 <= remote->prune)
1557 prune = remote->prune;
1558 else if (0 <= fetch_prune_config)
1559 prune = fetch_prune_config;
1560 else
1561 prune = PRUNE_BY_DEFAULT;
1562 }
1563
1564 if (prune_tags < 0) {
1565 /* no command line request */
1566 if (0 <= remote->prune_tags)
1567 prune_tags = remote->prune_tags;
1568 else if (0 <= fetch_prune_tags_config)
1569 prune_tags = fetch_prune_tags_config;
1570 else
1571 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1572 }
1573
1574 maybe_prune_tags = prune_tags_ok && prune_tags;
1575 if (maybe_prune_tags && remote_via_config)
1576 refspec_append(&remote->fetch, TAG_REFSPEC);
1577
1578 if (maybe_prune_tags && (argc || !remote_via_config))
1579 refspec_append(&rs, TAG_REFSPEC);
1580
1581 for (i = 0; i < argc; i++) {
1582 if (!strcmp(argv[i], "tag")) {
1583 char *tag;
1584 i++;
1585 if (i >= argc)
1586 die(_("You need to specify a tag name."));
1587
1588 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1589 argv[i], argv[i]);
1590 refspec_append(&rs, tag);
1591 free(tag);
1592 } else {
1593 refspec_append(&rs, argv[i]);
1594 }
1595 }
1596
1597 if (server_options.nr)
1598 gtransport->server_options = &server_options;
1599
1600 sigchain_push_common(unlock_pack_on_signal);
1601 atexit(unlock_pack);
1602 sigchain_push(SIGPIPE, SIG_IGN);
1603 exit_code = do_fetch(gtransport, &rs);
1604 sigchain_pop(SIGPIPE);
1605 refspec_clear(&rs);
1606 transport_disconnect(gtransport);
1607 gtransport = NULL;
1608 return exit_code;
1609 }
1610
1611 int cmd_fetch(int argc, const char **argv, const char *prefix)
1612 {
1613 int i;
1614 struct string_list list = STRING_LIST_INIT_DUP;
1615 struct remote *remote = NULL;
1616 int result = 0;
1617 int prune_tags_ok = 1;
1618 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1619
1620 packet_trace_identity("fetch");
1621
1622 fetch_if_missing = 0;
1623
1624 /* Record the command line for the reflog */
1625 strbuf_addstr(&default_rla, "fetch");
1626 for (i = 1; i < argc; i++)
1627 strbuf_addf(&default_rla, " %s", argv[i]);
1628
1629 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1630 git_config(git_fetch_config, NULL);
1631
1632 argc = parse_options(argc, argv, prefix,
1633 builtin_fetch_options, builtin_fetch_usage, 0);
1634
1635 if (deepen_relative) {
1636 if (deepen_relative < 0)
1637 die(_("Negative depth in --deepen is not supported"));
1638 if (depth)
1639 die(_("--deepen and --depth are mutually exclusive"));
1640 depth = xstrfmt("%d", deepen_relative);
1641 }
1642 if (unshallow) {
1643 if (depth)
1644 die(_("--depth and --unshallow cannot be used together"));
1645 else if (!is_repository_shallow(the_repository))
1646 die(_("--unshallow on a complete repository does not make sense"));
1647 else
1648 depth = xstrfmt("%d", INFINITE_DEPTH);
1649 }
1650
1651 /* no need to be strict, transport_set_option() will validate it again */
1652 if (depth && atoi(depth) < 1)
1653 die(_("depth %s is not a positive number"), depth);
1654 if (depth || deepen_since || deepen_not.nr)
1655 deepen = 1;
1656
1657 if (filter_options.choice && !repository_format_partial_clone)
1658 die("--filter can only be used when extensions.partialClone is set");
1659
1660 if (all) {
1661 if (argc == 1)
1662 die(_("fetch --all does not take a repository argument"));
1663 else if (argc > 1)
1664 die(_("fetch --all does not make sense with refspecs"));
1665 (void) for_each_remote(get_one_remote_for_fetch, &list);
1666 } else if (argc == 0) {
1667 /* No arguments -- use default remote */
1668 remote = remote_get(NULL);
1669 } else if (multiple) {
1670 /* All arguments are assumed to be remotes or groups */
1671 for (i = 0; i < argc; i++)
1672 if (!add_remote_or_group(argv[i], &list))
1673 die(_("No such remote or remote group: %s"), argv[i]);
1674 } else {
1675 /* Single remote or group */
1676 (void) add_remote_or_group(argv[0], &list);
1677 if (list.nr > 1) {
1678 /* More than one remote */
1679 if (argc > 1)
1680 die(_("Fetching a group and specifying refspecs does not make sense"));
1681 } else {
1682 /* Zero or one remotes */
1683 remote = remote_get(argv[0]);
1684 prune_tags_ok = (argc == 1);
1685 argc--;
1686 argv++;
1687 }
1688 }
1689
1690 if (remote) {
1691 if (filter_options.choice || repository_format_partial_clone)
1692 fetch_one_setup_partial(remote);
1693 result = fetch_one(remote, argc, argv, prune_tags_ok);
1694 } else {
1695 if (filter_options.choice)
1696 die(_("--filter can only be used with the remote "
1697 "configured in extensions.partialclone"));
1698 /* TODO should this also die if we have a previous partial-clone? */
1699 result = fetch_multiple(&list);
1700 }
1701
1702 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1703 struct argv_array options = ARGV_ARRAY_INIT;
1704
1705 add_options_to_argv(&options);
1706 result = fetch_populated_submodules(the_repository,
1707 &options,
1708 submodule_prefix,
1709 recurse_submodules,
1710 recurse_submodules_default,
1711 verbosity < 0,
1712 max_children);
1713 argv_array_clear(&options);
1714 }
1715
1716 string_list_clear(&list, 0);
1717
1718 close_object_store(the_repository->objects);
1719
1720 if (enable_auto_gc) {
1721 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1722 if (verbosity < 0)
1723 argv_array_push(&argv_gc_auto, "--quiet");
1724 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1725 argv_array_clear(&argv_gc_auto);
1726 }
1727
1728 return result;
1729 }
Unnamed repository; edit this file 'description' to name the repository.