fetch: add fetch.writeCommitGraph config setting
[git/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 #include "commit-graph.h"
27
28 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
29
30 static const char * const builtin_fetch_usage[] = {
31 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
32 N_("git fetch [<options>] <group>"),
33 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
34 N_("git fetch --all [<options>]"),
35 NULL
36 };
37
38 enum {
39 TAGS_UNSET = 0,
40 TAGS_DEFAULT = 1,
41 TAGS_SET = 2
42 };
43
44 static int fetch_prune_config = -1; /* unspecified */
45 static int fetch_show_forced_updates = 1;
46 static uint64_t forced_updates_ms = 0;
47 static int prune = -1; /* unspecified */
48 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
49
50 static int fetch_prune_tags_config = -1; /* unspecified */
51 static int prune_tags = -1; /* unspecified */
52 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
53
54 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
55 static int progress = -1;
56 static int enable_auto_gc = 1;
57 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
58 static int max_children = 1;
59 static enum transport_family family;
60 static const char *depth;
61 static const char *deepen_since;
62 static const char *upload_pack;
63 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
64 static struct strbuf default_rla = STRBUF_INIT;
65 static struct transport *gtransport;
66 static struct transport *gsecondary;
67 static const char *submodule_prefix = "";
68 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
69 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
70 static int shown_url = 0;
71 static struct refspec refmap = REFSPEC_INIT_FETCH;
72 static struct list_objects_filter_options filter_options;
73 static struct string_list server_options = STRING_LIST_INIT_DUP;
74 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
75
76 static int git_fetch_config(const char *k, const char *v, void *cb)
77 {
78 if (!strcmp(k, "fetch.prune")) {
79 fetch_prune_config = git_config_bool(k, v);
80 return 0;
81 }
82
83 if (!strcmp(k, "fetch.prunetags")) {
84 fetch_prune_tags_config = git_config_bool(k, v);
85 return 0;
86 }
87
88 if (!strcmp(k, "fetch.showforcedupdates")) {
89 fetch_show_forced_updates = git_config_bool(k, v);
90 return 0;
91 }
92
93 if (!strcmp(k, "submodule.recurse")) {
94 int r = git_config_bool(k, v) ?
95 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
96 recurse_submodules = r;
97 }
98
99 if (!strcmp(k, "submodule.fetchjobs")) {
100 max_children = parse_submodule_fetchjobs(k, v);
101 return 0;
102 } else if (!strcmp(k, "fetch.recursesubmodules")) {
103 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
104 return 0;
105 }
106
107 return git_default_config(k, v, cb);
108 }
109
110 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
111 {
112 BUG_ON_OPT_NEG(unset);
113
114 /*
115 * "git fetch --refmap='' origin foo"
116 * can be used to tell the command not to store anywhere
117 */
118 refspec_append(&refmap, arg);
119
120 return 0;
121 }
122
123 static struct option builtin_fetch_options[] = {
124 OPT__VERBOSITY(&verbosity),
125 OPT_BOOL(0, "all", &all,
126 N_("fetch from all remotes")),
127 OPT_BOOL('a', "append", &append,
128 N_("append to .git/FETCH_HEAD instead of overwriting")),
129 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
130 N_("path to upload pack on remote end")),
131 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
132 OPT_BOOL('m', "multiple", &multiple,
133 N_("fetch from multiple remotes")),
134 OPT_SET_INT('t', "tags", &tags,
135 N_("fetch all tags and associated objects"), TAGS_SET),
136 OPT_SET_INT('n', NULL, &tags,
137 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
138 OPT_INTEGER('j', "jobs", &max_children,
139 N_("number of submodules fetched in parallel")),
140 OPT_BOOL('p', "prune", &prune,
141 N_("prune remote-tracking branches no longer on remote")),
142 OPT_BOOL('P', "prune-tags", &prune_tags,
143 N_("prune local tags no longer on remote and clobber changed tags")),
144 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
145 N_("control recursive fetching of submodules"),
146 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
147 OPT_BOOL(0, "dry-run", &dry_run,
148 N_("dry run")),
149 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
150 OPT_BOOL('u', "update-head-ok", &update_head_ok,
151 N_("allow updating of HEAD ref")),
152 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
153 OPT_STRING(0, "depth", &depth, N_("depth"),
154 N_("deepen history of shallow clone")),
155 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
156 N_("deepen history of shallow repository based on time")),
157 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
158 N_("deepen history of shallow clone, excluding rev")),
159 OPT_INTEGER(0, "deepen", &deepen_relative,
160 N_("deepen history of shallow clone")),
161 OPT_SET_INT_F(0, "unshallow", &unshallow,
162 N_("convert to a complete repository"),
163 1, PARSE_OPT_NONEG),
164 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
165 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
166 { OPTION_CALLBACK, 0, "recurse-submodules-default",
167 &recurse_submodules_default, N_("on-demand"),
168 N_("default for recursive fetching of submodules "
169 "(lower priority than config files)"),
170 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
171 OPT_BOOL(0, "update-shallow", &update_shallow,
172 N_("accept refs that update .git/shallow")),
173 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
174 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
175 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
176 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
177 TRANSPORT_FAMILY_IPV4),
178 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
179 TRANSPORT_FAMILY_IPV6),
180 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
181 N_("report that we have only objects reachable from this object")),
182 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
183 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
184 N_("run 'gc --auto' after fetching")),
185 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
186 N_("check for forced-updates on all updated branches")),
187 OPT_END()
188 };
189
190 static void unlock_pack(void)
191 {
192 if (gtransport)
193 transport_unlock_pack(gtransport);
194 if (gsecondary)
195 transport_unlock_pack(gsecondary);
196 }
197
198 static void unlock_pack_on_signal(int signo)
199 {
200 unlock_pack();
201 sigchain_pop(signo);
202 raise(signo);
203 }
204
205 static void add_merge_config(struct ref **head,
206 const struct ref *remote_refs,
207 struct branch *branch,
208 struct ref ***tail)
209 {
210 int i;
211
212 for (i = 0; i < branch->merge_nr; i++) {
213 struct ref *rm, **old_tail = *tail;
214 struct refspec_item refspec;
215
216 for (rm = *head; rm; rm = rm->next) {
217 if (branch_merge_matches(branch, i, rm->name)) {
218 rm->fetch_head_status = FETCH_HEAD_MERGE;
219 break;
220 }
221 }
222 if (rm)
223 continue;
224
225 /*
226 * Not fetched to a remote-tracking branch? We need to fetch
227 * it anyway to allow this branch's "branch.$name.merge"
228 * to be honored by 'git pull', but we do not have to
229 * fail if branch.$name.merge is misconfigured to point
230 * at a nonexisting branch. If we were indeed called by
231 * 'git pull', it will notice the misconfiguration because
232 * there is no entry in the resulting FETCH_HEAD marked
233 * for merging.
234 */
235 memset(&refspec, 0, sizeof(refspec));
236 refspec.src = branch->merge[i]->src;
237 get_fetch_map(remote_refs, &refspec, tail, 1);
238 for (rm = *old_tail; rm; rm = rm->next)
239 rm->fetch_head_status = FETCH_HEAD_MERGE;
240 }
241 }
242
243 static int will_fetch(struct ref **head, const unsigned char *sha1)
244 {
245 struct ref *rm = *head;
246 while (rm) {
247 if (hasheq(rm->old_oid.hash, sha1))
248 return 1;
249 rm = rm->next;
250 }
251 return 0;
252 }
253
254 struct refname_hash_entry {
255 struct hashmap_entry ent; /* must be the first member */
256 struct object_id oid;
257 int ignore;
258 char refname[FLEX_ARRAY];
259 };
260
261 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
262 const void *e1_,
263 const void *e2_,
264 const void *keydata)
265 {
266 const struct refname_hash_entry *e1 = e1_;
267 const struct refname_hash_entry *e2 = e2_;
268
269 return strcmp(e1->refname, keydata ? keydata : e2->refname);
270 }
271
272 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
273 const char *refname,
274 const struct object_id *oid)
275 {
276 struct refname_hash_entry *ent;
277 size_t len = strlen(refname);
278
279 FLEX_ALLOC_MEM(ent, refname, refname, len);
280 hashmap_entry_init(ent, strhash(refname));
281 oidcpy(&ent->oid, oid);
282 hashmap_add(map, ent);
283 return ent;
284 }
285
286 static int add_one_refname(const char *refname,
287 const struct object_id *oid,
288 int flag, void *cbdata)
289 {
290 struct hashmap *refname_map = cbdata;
291
292 (void) refname_hash_add(refname_map, refname, oid);
293 return 0;
294 }
295
296 static void refname_hash_init(struct hashmap *map)
297 {
298 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
299 }
300
301 static int refname_hash_exists(struct hashmap *map, const char *refname)
302 {
303 return !!hashmap_get_from_hash(map, strhash(refname), refname);
304 }
305
306 static void clear_item(struct refname_hash_entry *item)
307 {
308 item->ignore = 1;
309 }
310
311 static void find_non_local_tags(const struct ref *refs,
312 struct ref **head,
313 struct ref ***tail)
314 {
315 struct hashmap existing_refs;
316 struct hashmap remote_refs;
317 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
318 struct string_list_item *remote_ref_item;
319 const struct ref *ref;
320 struct refname_hash_entry *item = NULL;
321
322 refname_hash_init(&existing_refs);
323 refname_hash_init(&remote_refs);
324
325 for_each_ref(add_one_refname, &existing_refs);
326 for (ref = refs; ref; ref = ref->next) {
327 if (!starts_with(ref->name, "refs/tags/"))
328 continue;
329
330 /*
331 * The peeled ref always follows the matching base
332 * ref, so if we see a peeled ref that we don't want
333 * to fetch then we can mark the ref entry in the list
334 * as one to ignore by setting util to NULL.
335 */
336 if (ends_with(ref->name, "^{}")) {
337 if (item &&
338 !has_object_file_with_flags(&ref->old_oid,
339 OBJECT_INFO_QUICK) &&
340 !will_fetch(head, ref->old_oid.hash) &&
341 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
342 !will_fetch(head, item->oid.hash))
343 clear_item(item);
344 item = NULL;
345 continue;
346 }
347
348 /*
349 * If item is non-NULL here, then we previously saw a
350 * ref not followed by a peeled reference, so we need
351 * to check if it is a lightweight tag that we want to
352 * fetch.
353 */
354 if (item &&
355 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
356 !will_fetch(head, item->oid.hash))
357 clear_item(item);
358
359 item = NULL;
360
361 /* skip duplicates and refs that we already have */
362 if (refname_hash_exists(&remote_refs, ref->name) ||
363 refname_hash_exists(&existing_refs, ref->name))
364 continue;
365
366 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
367 string_list_insert(&remote_refs_list, ref->name);
368 }
369 hashmap_free(&existing_refs, 1);
370
371 /*
372 * We may have a final lightweight tag that needs to be
373 * checked to see if it needs fetching.
374 */
375 if (item &&
376 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
377 !will_fetch(head, item->oid.hash))
378 clear_item(item);
379
380 /*
381 * For all the tags in the remote_refs_list,
382 * add them to the list of refs to be fetched
383 */
384 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
385 const char *refname = remote_ref_item->string;
386 struct ref *rm;
387
388 item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
389 if (!item)
390 BUG("unseen remote ref?");
391
392 /* Unless we have already decided to ignore this item... */
393 if (item->ignore)
394 continue;
395
396 rm = alloc_ref(item->refname);
397 rm->peer_ref = alloc_ref(item->refname);
398 oidcpy(&rm->old_oid, &item->oid);
399 **tail = rm;
400 *tail = &rm->next;
401 }
402 hashmap_free(&remote_refs, 1);
403 string_list_clear(&remote_refs_list, 0);
404 }
405
406 static struct ref *get_ref_map(struct remote *remote,
407 const struct ref *remote_refs,
408 struct refspec *rs,
409 int tags, int *autotags)
410 {
411 int i;
412 struct ref *rm;
413 struct ref *ref_map = NULL;
414 struct ref **tail = &ref_map;
415
416 /* opportunistically-updated references: */
417 struct ref *orefs = NULL, **oref_tail = &orefs;
418
419 struct hashmap existing_refs;
420
421 if (rs->nr) {
422 struct refspec *fetch_refspec;
423
424 for (i = 0; i < rs->nr; i++) {
425 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
426 if (rs->items[i].dst && rs->items[i].dst[0])
427 *autotags = 1;
428 }
429 /* Merge everything on the command line (but not --tags) */
430 for (rm = ref_map; rm; rm = rm->next)
431 rm->fetch_head_status = FETCH_HEAD_MERGE;
432
433 /*
434 * For any refs that we happen to be fetching via
435 * command-line arguments, the destination ref might
436 * have been missing or have been different than the
437 * remote-tracking ref that would be derived from the
438 * configured refspec. In these cases, we want to
439 * take the opportunity to update their configured
440 * remote-tracking reference. However, we do not want
441 * to mention these entries in FETCH_HEAD at all, as
442 * they would simply be duplicates of existing
443 * entries, so we set them FETCH_HEAD_IGNORE below.
444 *
445 * We compute these entries now, based only on the
446 * refspecs specified on the command line. But we add
447 * them to the list following the refspecs resulting
448 * from the tags option so that one of the latter,
449 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
450 * by ref_remove_duplicates() in favor of one of these
451 * opportunistic entries with FETCH_HEAD_IGNORE.
452 */
453 if (refmap.nr)
454 fetch_refspec = &refmap;
455 else
456 fetch_refspec = &remote->fetch;
457
458 for (i = 0; i < fetch_refspec->nr; i++)
459 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
460 } else if (refmap.nr) {
461 die("--refmap option is only meaningful with command-line refspec(s).");
462 } else {
463 /* Use the defaults */
464 struct branch *branch = branch_get(NULL);
465 int has_merge = branch_has_merge_config(branch);
466 if (remote &&
467 (remote->fetch.nr ||
468 /* Note: has_merge implies non-NULL branch->remote_name */
469 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
470 for (i = 0; i < remote->fetch.nr; i++) {
471 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
472 if (remote->fetch.items[i].dst &&
473 remote->fetch.items[i].dst[0])
474 *autotags = 1;
475 if (!i && !has_merge && ref_map &&
476 !remote->fetch.items[0].pattern)
477 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
478 }
479 /*
480 * if the remote we're fetching from is the same
481 * as given in branch.<name>.remote, we add the
482 * ref given in branch.<name>.merge, too.
483 *
484 * Note: has_merge implies non-NULL branch->remote_name
485 */
486 if (has_merge &&
487 !strcmp(branch->remote_name, remote->name))
488 add_merge_config(&ref_map, remote_refs, branch, &tail);
489 } else {
490 ref_map = get_remote_ref(remote_refs, "HEAD");
491 if (!ref_map)
492 die(_("Couldn't find remote ref HEAD"));
493 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
494 tail = &ref_map->next;
495 }
496 }
497
498 if (tags == TAGS_SET)
499 /* also fetch all tags */
500 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
501 else if (tags == TAGS_DEFAULT && *autotags)
502 find_non_local_tags(remote_refs, &ref_map, &tail);
503
504 /* Now append any refs to be updated opportunistically: */
505 *tail = orefs;
506 for (rm = orefs; rm; rm = rm->next) {
507 rm->fetch_head_status = FETCH_HEAD_IGNORE;
508 tail = &rm->next;
509 }
510
511 ref_map = ref_remove_duplicates(ref_map);
512
513 refname_hash_init(&existing_refs);
514 for_each_ref(add_one_refname, &existing_refs);
515
516 for (rm = ref_map; rm; rm = rm->next) {
517 if (rm->peer_ref) {
518 const char *refname = rm->peer_ref->name;
519 struct refname_hash_entry *peer_item;
520
521 peer_item = hashmap_get_from_hash(&existing_refs,
522 strhash(refname),
523 refname);
524 if (peer_item) {
525 struct object_id *old_oid = &peer_item->oid;
526 oidcpy(&rm->peer_ref->old_oid, old_oid);
527 }
528 }
529 }
530 hashmap_free(&existing_refs, 1);
531
532 return ref_map;
533 }
534
535 #define STORE_REF_ERROR_OTHER 1
536 #define STORE_REF_ERROR_DF_CONFLICT 2
537
538 static int s_update_ref(const char *action,
539 struct ref *ref,
540 int check_old)
541 {
542 char *msg;
543 char *rla = getenv("GIT_REFLOG_ACTION");
544 struct ref_transaction *transaction;
545 struct strbuf err = STRBUF_INIT;
546 int ret, df_conflict = 0;
547
548 if (dry_run)
549 return 0;
550 if (!rla)
551 rla = default_rla.buf;
552 msg = xstrfmt("%s: %s", rla, action);
553
554 transaction = ref_transaction_begin(&err);
555 if (!transaction ||
556 ref_transaction_update(transaction, ref->name,
557 &ref->new_oid,
558 check_old ? &ref->old_oid : NULL,
559 0, msg, &err))
560 goto fail;
561
562 ret = ref_transaction_commit(transaction, &err);
563 if (ret) {
564 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
565 goto fail;
566 }
567
568 ref_transaction_free(transaction);
569 strbuf_release(&err);
570 free(msg);
571 return 0;
572 fail:
573 ref_transaction_free(transaction);
574 error("%s", err.buf);
575 strbuf_release(&err);
576 free(msg);
577 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
578 : STORE_REF_ERROR_OTHER;
579 }
580
581 static int refcol_width = 10;
582 static int compact_format;
583
584 static void adjust_refcol_width(const struct ref *ref)
585 {
586 int max, rlen, llen, len;
587
588 /* uptodate lines are only shown on high verbosity level */
589 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
590 return;
591
592 max = term_columns();
593 rlen = utf8_strwidth(prettify_refname(ref->name));
594
595 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
596
597 /*
598 * rough estimation to see if the output line is too long and
599 * should not be counted (we can't do precise calculation
600 * anyway because we don't know if the error explanation part
601 * will be printed in update_local_ref)
602 */
603 if (compact_format) {
604 llen = 0;
605 max = max * 2 / 3;
606 }
607 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
608 if (len >= max)
609 return;
610
611 /*
612 * Not precise calculation for compact mode because '*' can
613 * appear on the left hand side of '->' and shrink the column
614 * back.
615 */
616 if (refcol_width < rlen)
617 refcol_width = rlen;
618 }
619
620 static void prepare_format_display(struct ref *ref_map)
621 {
622 struct ref *rm;
623 const char *format = "full";
624
625 git_config_get_string_const("fetch.output", &format);
626 if (!strcasecmp(format, "full"))
627 compact_format = 0;
628 else if (!strcasecmp(format, "compact"))
629 compact_format = 1;
630 else
631 die(_("configuration fetch.output contains invalid value %s"),
632 format);
633
634 for (rm = ref_map; rm; rm = rm->next) {
635 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
636 !rm->peer_ref ||
637 !strcmp(rm->name, "HEAD"))
638 continue;
639
640 adjust_refcol_width(rm);
641 }
642 }
643
644 static void print_remote_to_local(struct strbuf *display,
645 const char *remote, const char *local)
646 {
647 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
648 }
649
650 static int find_and_replace(struct strbuf *haystack,
651 const char *needle,
652 const char *placeholder)
653 {
654 const char *p = NULL;
655 int plen, nlen;
656
657 nlen = strlen(needle);
658 if (ends_with(haystack->buf, needle))
659 p = haystack->buf + haystack->len - nlen;
660 else
661 p = strstr(haystack->buf, needle);
662 if (!p)
663 return 0;
664
665 if (p > haystack->buf && p[-1] != '/')
666 return 0;
667
668 plen = strlen(p);
669 if (plen > nlen && p[nlen] != '/')
670 return 0;
671
672 strbuf_splice(haystack, p - haystack->buf, nlen,
673 placeholder, strlen(placeholder));
674 return 1;
675 }
676
677 static void print_compact(struct strbuf *display,
678 const char *remote, const char *local)
679 {
680 struct strbuf r = STRBUF_INIT;
681 struct strbuf l = STRBUF_INIT;
682
683 if (!strcmp(remote, local)) {
684 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
685 return;
686 }
687
688 strbuf_addstr(&r, remote);
689 strbuf_addstr(&l, local);
690
691 if (!find_and_replace(&r, local, "*"))
692 find_and_replace(&l, remote, "*");
693 print_remote_to_local(display, r.buf, l.buf);
694
695 strbuf_release(&r);
696 strbuf_release(&l);
697 }
698
699 static void format_display(struct strbuf *display, char code,
700 const char *summary, const char *error,
701 const char *remote, const char *local,
702 int summary_width)
703 {
704 int width = (summary_width + strlen(summary) - gettext_width(summary));
705
706 strbuf_addf(display, "%c %-*s ", code, width, summary);
707 if (!compact_format)
708 print_remote_to_local(display, remote, local);
709 else
710 print_compact(display, remote, local);
711 if (error)
712 strbuf_addf(display, " (%s)", error);
713 }
714
715 static int update_local_ref(struct ref *ref,
716 const char *remote,
717 const struct ref *remote_ref,
718 struct strbuf *display,
719 int summary_width)
720 {
721 struct commit *current = NULL, *updated;
722 enum object_type type;
723 struct branch *current_branch = branch_get(NULL);
724 const char *pretty_ref = prettify_refname(ref->name);
725 int fast_forward = 0;
726
727 type = oid_object_info(the_repository, &ref->new_oid, NULL);
728 if (type < 0)
729 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
730
731 if (oideq(&ref->old_oid, &ref->new_oid)) {
732 if (verbosity > 0)
733 format_display(display, '=', _("[up to date]"), NULL,
734 remote, pretty_ref, summary_width);
735 return 0;
736 }
737
738 if (current_branch &&
739 !strcmp(ref->name, current_branch->name) &&
740 !(update_head_ok || is_bare_repository()) &&
741 !is_null_oid(&ref->old_oid)) {
742 /*
743 * If this is the head, and it's not okay to update
744 * the head, and the old value of the head isn't empty...
745 */
746 format_display(display, '!', _("[rejected]"),
747 _("can't fetch in current branch"),
748 remote, pretty_ref, summary_width);
749 return 1;
750 }
751
752 if (!is_null_oid(&ref->old_oid) &&
753 starts_with(ref->name, "refs/tags/")) {
754 if (force || ref->force) {
755 int r;
756 r = s_update_ref("updating tag", ref, 0);
757 format_display(display, r ? '!' : 't', _("[tag update]"),
758 r ? _("unable to update local ref") : NULL,
759 remote, pretty_ref, summary_width);
760 return r;
761 } else {
762 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
763 remote, pretty_ref, summary_width);
764 return 1;
765 }
766 }
767
768 current = lookup_commit_reference_gently(the_repository,
769 &ref->old_oid, 1);
770 updated = lookup_commit_reference_gently(the_repository,
771 &ref->new_oid, 1);
772 if (!current || !updated) {
773 const char *msg;
774 const char *what;
775 int r;
776 /*
777 * Nicely describe the new ref we're fetching.
778 * Base this on the remote's ref name, as it's
779 * more likely to follow a standard layout.
780 */
781 const char *name = remote_ref ? remote_ref->name : "";
782 if (starts_with(name, "refs/tags/")) {
783 msg = "storing tag";
784 what = _("[new tag]");
785 } else if (starts_with(name, "refs/heads/")) {
786 msg = "storing head";
787 what = _("[new branch]");
788 } else {
789 msg = "storing ref";
790 what = _("[new ref]");
791 }
792
793 r = s_update_ref(msg, ref, 0);
794 format_display(display, r ? '!' : '*', what,
795 r ? _("unable to update local ref") : NULL,
796 remote, pretty_ref, summary_width);
797 return r;
798 }
799
800 if (fetch_show_forced_updates) {
801 uint64_t t_before = getnanotime();
802 fast_forward = in_merge_bases(current, updated);
803 forced_updates_ms += (getnanotime() - t_before) / 1000000;
804 } else {
805 fast_forward = 1;
806 }
807
808 if (fast_forward) {
809 struct strbuf quickref = STRBUF_INIT;
810 int r;
811
812 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
813 strbuf_addstr(&quickref, "..");
814 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
815 r = s_update_ref("fast-forward", ref, 1);
816 format_display(display, r ? '!' : ' ', quickref.buf,
817 r ? _("unable to update local ref") : NULL,
818 remote, pretty_ref, summary_width);
819 strbuf_release(&quickref);
820 return r;
821 } else if (force || ref->force) {
822 struct strbuf quickref = STRBUF_INIT;
823 int r;
824 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
825 strbuf_addstr(&quickref, "...");
826 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
827 r = s_update_ref("forced-update", ref, 1);
828 format_display(display, r ? '!' : '+', quickref.buf,
829 r ? _("unable to update local ref") : _("forced update"),
830 remote, pretty_ref, summary_width);
831 strbuf_release(&quickref);
832 return r;
833 } else {
834 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
835 remote, pretty_ref, summary_width);
836 return 1;
837 }
838 }
839
840 static int iterate_ref_map(void *cb_data, struct object_id *oid)
841 {
842 struct ref **rm = cb_data;
843 struct ref *ref = *rm;
844
845 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
846 ref = ref->next;
847 if (!ref)
848 return -1; /* end of the list */
849 *rm = ref->next;
850 oidcpy(oid, &ref->old_oid);
851 return 0;
852 }
853
854 static int store_updated_refs(const char *raw_url, const char *remote_name,
855 int connectivity_checked, struct ref *ref_map)
856 {
857 FILE *fp;
858 struct commit *commit;
859 int url_len, i, rc = 0;
860 struct strbuf note = STRBUF_INIT;
861 const char *what, *kind;
862 struct ref *rm;
863 char *url;
864 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
865 int want_status;
866 int summary_width = transport_summary_width(ref_map);
867
868 fp = fopen(filename, "a");
869 if (!fp)
870 return error_errno(_("cannot open %s"), filename);
871
872 if (raw_url)
873 url = transport_anonymize_url(raw_url);
874 else
875 url = xstrdup("foreign");
876
877 if (!connectivity_checked) {
878 rm = ref_map;
879 if (check_connected(iterate_ref_map, &rm, NULL)) {
880 rc = error(_("%s did not send all necessary objects\n"), url);
881 goto abort;
882 }
883 }
884
885 prepare_format_display(ref_map);
886
887 /*
888 * We do a pass for each fetch_head_status type in their enum order, so
889 * merged entries are written before not-for-merge. That lets readers
890 * use FETCH_HEAD as a refname to refer to the ref to be merged.
891 */
892 for (want_status = FETCH_HEAD_MERGE;
893 want_status <= FETCH_HEAD_IGNORE;
894 want_status++) {
895 for (rm = ref_map; rm; rm = rm->next) {
896 struct ref *ref = NULL;
897 const char *merge_status_marker = "";
898
899 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
900 if (want_status == FETCH_HEAD_MERGE)
901 warning(_("reject %s because shallow roots are not allowed to be updated"),
902 rm->peer_ref ? rm->peer_ref->name : rm->name);
903 continue;
904 }
905
906 commit = lookup_commit_reference_gently(the_repository,
907 &rm->old_oid,
908 1);
909 if (!commit)
910 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
911
912 if (rm->fetch_head_status != want_status)
913 continue;
914
915 if (rm->peer_ref) {
916 ref = alloc_ref(rm->peer_ref->name);
917 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
918 oidcpy(&ref->new_oid, &rm->old_oid);
919 ref->force = rm->peer_ref->force;
920 }
921
922 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
923 check_for_new_submodule_commits(&rm->old_oid);
924
925 if (!strcmp(rm->name, "HEAD")) {
926 kind = "";
927 what = "";
928 }
929 else if (starts_with(rm->name, "refs/heads/")) {
930 kind = "branch";
931 what = rm->name + 11;
932 }
933 else if (starts_with(rm->name, "refs/tags/")) {
934 kind = "tag";
935 what = rm->name + 10;
936 }
937 else if (starts_with(rm->name, "refs/remotes/")) {
938 kind = "remote-tracking branch";
939 what = rm->name + 13;
940 }
941 else {
942 kind = "";
943 what = rm->name;
944 }
945
946 url_len = strlen(url);
947 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
948 ;
949 url_len = i + 1;
950 if (4 < i && !strncmp(".git", url + i - 3, 4))
951 url_len = i - 3;
952
953 strbuf_reset(&note);
954 if (*what) {
955 if (*kind)
956 strbuf_addf(&note, "%s ", kind);
957 strbuf_addf(&note, "'%s' of ", what);
958 }
959 switch (rm->fetch_head_status) {
960 case FETCH_HEAD_NOT_FOR_MERGE:
961 merge_status_marker = "not-for-merge";
962 /* fall-through */
963 case FETCH_HEAD_MERGE:
964 fprintf(fp, "%s\t%s\t%s",
965 oid_to_hex(&rm->old_oid),
966 merge_status_marker,
967 note.buf);
968 for (i = 0; i < url_len; ++i)
969 if ('\n' == url[i])
970 fputs("\\n", fp);
971 else
972 fputc(url[i], fp);
973 fputc('\n', fp);
974 break;
975 default:
976 /* do not write anything to FETCH_HEAD */
977 break;
978 }
979
980 strbuf_reset(&note);
981 if (ref) {
982 rc |= update_local_ref(ref, what, rm, &note,
983 summary_width);
984 free(ref);
985 } else
986 format_display(&note, '*',
987 *kind ? kind : "branch", NULL,
988 *what ? what : "HEAD",
989 "FETCH_HEAD", summary_width);
990 if (note.len) {
991 if (verbosity >= 0 && !shown_url) {
992 fprintf(stderr, _("From %.*s\n"),
993 url_len, url);
994 shown_url = 1;
995 }
996 if (verbosity >= 0)
997 fprintf(stderr, " %s\n", note.buf);
998 }
999 }
1000 }
1001
1002 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1003 error(_("some local refs could not be updated; try running\n"
1004 " 'git remote prune %s' to remove any old, conflicting "
1005 "branches"), remote_name);
1006
1007 if (advice_fetch_show_forced_updates) {
1008 if (!fetch_show_forced_updates) {
1009 warning(_("Fetch normally indicates which branches had a forced update, but that check has been disabled."));
1010 warning(_("To re-enable, use '--show-forced-updates' flag or run 'git config fetch.showForcedUpdates true'."));
1011 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1012 warning(_("It took %.2f seconds to check forced updates. You can use '--no-show-forced-updates'\n"),
1013 forced_updates_ms / 1000.0);
1014 warning(_("or run 'git config fetch.showForcedUpdates false' to avoid this check.\n"));
1015 }
1016 }
1017
1018 abort:
1019 strbuf_release(&note);
1020 free(url);
1021 fclose(fp);
1022 return rc;
1023 }
1024
1025 /*
1026 * We would want to bypass the object transfer altogether if
1027 * everything we are going to fetch already exists and is connected
1028 * locally.
1029 */
1030 static int check_exist_and_connected(struct ref *ref_map)
1031 {
1032 struct ref *rm = ref_map;
1033 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1034 struct ref *r;
1035
1036 /*
1037 * If we are deepening a shallow clone we already have these
1038 * objects reachable. Running rev-list here will return with
1039 * a good (0) exit status and we'll bypass the fetch that we
1040 * really need to perform. Claiming failure now will ensure
1041 * we perform the network exchange to deepen our history.
1042 */
1043 if (deepen)
1044 return -1;
1045
1046 /*
1047 * check_connected() allows objects to merely be promised, but
1048 * we need all direct targets to exist.
1049 */
1050 for (r = rm; r; r = r->next) {
1051 if (!has_object_file(&r->old_oid))
1052 return -1;
1053 }
1054
1055 opt.quiet = 1;
1056 return check_connected(iterate_ref_map, &rm, &opt);
1057 }
1058
1059 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1060 {
1061 int ret = check_exist_and_connected(ref_map);
1062 if (ret)
1063 ret = transport_fetch_refs(transport, ref_map);
1064 if (!ret)
1065 /*
1066 * Keep the new pack's ".keep" file around to allow the caller
1067 * time to update refs to reference the new objects.
1068 */
1069 return 0;
1070 transport_unlock_pack(transport);
1071 return ret;
1072 }
1073
1074 /* Update local refs based on the ref values fetched from a remote */
1075 static int consume_refs(struct transport *transport, struct ref *ref_map)
1076 {
1077 int connectivity_checked = transport->smart_options
1078 ? transport->smart_options->connectivity_checked : 0;
1079 int ret = store_updated_refs(transport->url,
1080 transport->remote->name,
1081 connectivity_checked,
1082 ref_map);
1083 transport_unlock_pack(transport);
1084 return ret;
1085 }
1086
1087 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1088 const char *raw_url)
1089 {
1090 int url_len, i, result = 0;
1091 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1092 char *url;
1093 int summary_width = transport_summary_width(stale_refs);
1094 const char *dangling_msg = dry_run
1095 ? _(" (%s will become dangling)")
1096 : _(" (%s has become dangling)");
1097
1098 if (raw_url)
1099 url = transport_anonymize_url(raw_url);
1100 else
1101 url = xstrdup("foreign");
1102
1103 url_len = strlen(url);
1104 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1105 ;
1106
1107 url_len = i + 1;
1108 if (4 < i && !strncmp(".git", url + i - 3, 4))
1109 url_len = i - 3;
1110
1111 if (!dry_run) {
1112 struct string_list refnames = STRING_LIST_INIT_NODUP;
1113
1114 for (ref = stale_refs; ref; ref = ref->next)
1115 string_list_append(&refnames, ref->name);
1116
1117 result = delete_refs("fetch: prune", &refnames, 0);
1118 string_list_clear(&refnames, 0);
1119 }
1120
1121 if (verbosity >= 0) {
1122 for (ref = stale_refs; ref; ref = ref->next) {
1123 struct strbuf sb = STRBUF_INIT;
1124 if (!shown_url) {
1125 fprintf(stderr, _("From %.*s\n"), url_len, url);
1126 shown_url = 1;
1127 }
1128 format_display(&sb, '-', _("[deleted]"), NULL,
1129 _("(none)"), prettify_refname(ref->name),
1130 summary_width);
1131 fprintf(stderr, " %s\n",sb.buf);
1132 strbuf_release(&sb);
1133 warn_dangling_symref(stderr, dangling_msg, ref->name);
1134 }
1135 }
1136
1137 free(url);
1138 free_refs(stale_refs);
1139 return result;
1140 }
1141
1142 static void check_not_current_branch(struct ref *ref_map)
1143 {
1144 struct branch *current_branch = branch_get(NULL);
1145
1146 if (is_bare_repository() || !current_branch)
1147 return;
1148
1149 for (; ref_map; ref_map = ref_map->next)
1150 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1151 ref_map->peer_ref->name))
1152 die(_("Refusing to fetch into current branch %s "
1153 "of non-bare repository"), current_branch->refname);
1154 }
1155
1156 static int truncate_fetch_head(void)
1157 {
1158 const char *filename = git_path_fetch_head(the_repository);
1159 FILE *fp = fopen_for_writing(filename);
1160
1161 if (!fp)
1162 return error_errno(_("cannot open %s"), filename);
1163 fclose(fp);
1164 return 0;
1165 }
1166
1167 static void set_option(struct transport *transport, const char *name, const char *value)
1168 {
1169 int r = transport_set_option(transport, name, value);
1170 if (r < 0)
1171 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1172 name, value, transport->url);
1173 if (r > 0)
1174 warning(_("Option \"%s\" is ignored for %s\n"),
1175 name, transport->url);
1176 }
1177
1178
1179 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1180 void *cb_data)
1181 {
1182 struct oid_array *oids = cb_data;
1183
1184 oid_array_append(oids, oid);
1185 return 0;
1186 }
1187
1188 static void add_negotiation_tips(struct git_transport_options *smart_options)
1189 {
1190 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1191 int i;
1192
1193 for (i = 0; i < negotiation_tip.nr; i++) {
1194 const char *s = negotiation_tip.items[i].string;
1195 int old_nr;
1196 if (!has_glob_specials(s)) {
1197 struct object_id oid;
1198 if (get_oid(s, &oid))
1199 die("%s is not a valid object", s);
1200 oid_array_append(oids, &oid);
1201 continue;
1202 }
1203 old_nr = oids->nr;
1204 for_each_glob_ref(add_oid, s, oids);
1205 if (old_nr == oids->nr)
1206 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1207 s);
1208 }
1209 smart_options->negotiation_tips = oids;
1210 }
1211
1212 static struct transport *prepare_transport(struct remote *remote, int deepen)
1213 {
1214 struct transport *transport;
1215
1216 transport = transport_get(remote, NULL);
1217 transport_set_verbosity(transport, verbosity, progress);
1218 transport->family = family;
1219 if (upload_pack)
1220 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1221 if (keep)
1222 set_option(transport, TRANS_OPT_KEEP, "yes");
1223 if (depth)
1224 set_option(transport, TRANS_OPT_DEPTH, depth);
1225 if (deepen && deepen_since)
1226 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1227 if (deepen && deepen_not.nr)
1228 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1229 (const char *)&deepen_not);
1230 if (deepen_relative)
1231 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1232 if (update_shallow)
1233 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1234 if (filter_options.choice) {
1235 struct strbuf expanded_filter_spec = STRBUF_INIT;
1236 expand_list_objects_filter_spec(&filter_options,
1237 &expanded_filter_spec);
1238 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1239 expanded_filter_spec.buf);
1240 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1241 strbuf_release(&expanded_filter_spec);
1242 }
1243 if (negotiation_tip.nr) {
1244 if (transport->smart_options)
1245 add_negotiation_tips(transport->smart_options);
1246 else
1247 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1248 }
1249 return transport;
1250 }
1251
1252 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1253 {
1254 int cannot_reuse;
1255
1256 /*
1257 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1258 * when remote helper is used (setting it to an empty string
1259 * is not unsetting). We could extend the remote helper
1260 * protocol for that, but for now, just force a new connection
1261 * without deepen-since. Similar story for deepen-not.
1262 */
1263 cannot_reuse = transport->cannot_reuse ||
1264 deepen_since || deepen_not.nr;
1265 if (cannot_reuse) {
1266 gsecondary = prepare_transport(transport->remote, 0);
1267 transport = gsecondary;
1268 }
1269
1270 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1271 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1272 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1273 if (!fetch_refs(transport, ref_map))
1274 consume_refs(transport, ref_map);
1275
1276 if (gsecondary) {
1277 transport_disconnect(gsecondary);
1278 gsecondary = NULL;
1279 }
1280 }
1281
1282 static int do_fetch(struct transport *transport,
1283 struct refspec *rs)
1284 {
1285 struct ref *ref_map;
1286 int autotags = (transport->remote->fetch_tags == 1);
1287 int retcode = 0;
1288 const struct ref *remote_refs;
1289 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1290 int must_list_refs = 1;
1291
1292 if (tags == TAGS_DEFAULT) {
1293 if (transport->remote->fetch_tags == 2)
1294 tags = TAGS_SET;
1295 if (transport->remote->fetch_tags == -1)
1296 tags = TAGS_UNSET;
1297 }
1298
1299 /* if not appending, truncate FETCH_HEAD */
1300 if (!append && !dry_run) {
1301 retcode = truncate_fetch_head();
1302 if (retcode)
1303 goto cleanup;
1304 }
1305
1306 if (rs->nr) {
1307 int i;
1308
1309 refspec_ref_prefixes(rs, &ref_prefixes);
1310
1311 /*
1312 * We can avoid listing refs if all of them are exact
1313 * OIDs
1314 */
1315 must_list_refs = 0;
1316 for (i = 0; i < rs->nr; i++) {
1317 if (!rs->items[i].exact_sha1) {
1318 must_list_refs = 1;
1319 break;
1320 }
1321 }
1322 } else if (transport->remote && transport->remote->fetch.nr)
1323 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1324
1325 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1326 must_list_refs = 1;
1327 if (ref_prefixes.argc)
1328 argv_array_push(&ref_prefixes, "refs/tags/");
1329 }
1330
1331 if (must_list_refs)
1332 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1333 else
1334 remote_refs = NULL;
1335
1336 argv_array_clear(&ref_prefixes);
1337
1338 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1339 tags, &autotags);
1340 if (!update_head_ok)
1341 check_not_current_branch(ref_map);
1342
1343 if (tags == TAGS_DEFAULT && autotags)
1344 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1345 if (prune) {
1346 /*
1347 * We only prune based on refspecs specified
1348 * explicitly (via command line or configuration); we
1349 * don't care whether --tags was specified.
1350 */
1351 if (rs->nr) {
1352 prune_refs(rs, ref_map, transport->url);
1353 } else {
1354 prune_refs(&transport->remote->fetch,
1355 ref_map,
1356 transport->url);
1357 }
1358 }
1359 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1360 free_refs(ref_map);
1361 retcode = 1;
1362 goto cleanup;
1363 }
1364 free_refs(ref_map);
1365
1366 /* if neither --no-tags nor --tags was specified, do automated tag
1367 * following ... */
1368 if (tags == TAGS_DEFAULT && autotags) {
1369 struct ref **tail = &ref_map;
1370 ref_map = NULL;
1371 find_non_local_tags(remote_refs, &ref_map, &tail);
1372 if (ref_map)
1373 backfill_tags(transport, ref_map);
1374 free_refs(ref_map);
1375 }
1376
1377 cleanup:
1378 return retcode;
1379 }
1380
1381 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1382 {
1383 struct string_list *list = priv;
1384 if (!remote->skip_default_update)
1385 string_list_append(list, remote->name);
1386 return 0;
1387 }
1388
1389 struct remote_group_data {
1390 const char *name;
1391 struct string_list *list;
1392 };
1393
1394 static int get_remote_group(const char *key, const char *value, void *priv)
1395 {
1396 struct remote_group_data *g = priv;
1397
1398 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1399 /* split list by white space */
1400 while (*value) {
1401 size_t wordlen = strcspn(value, " \t\n");
1402
1403 if (wordlen >= 1)
1404 string_list_append_nodup(g->list,
1405 xstrndup(value, wordlen));
1406 value += wordlen + (value[wordlen] != '\0');
1407 }
1408 }
1409
1410 return 0;
1411 }
1412
1413 static int add_remote_or_group(const char *name, struct string_list *list)
1414 {
1415 int prev_nr = list->nr;
1416 struct remote_group_data g;
1417 g.name = name; g.list = list;
1418
1419 git_config(get_remote_group, &g);
1420 if (list->nr == prev_nr) {
1421 struct remote *remote = remote_get(name);
1422 if (!remote_is_configured(remote, 0))
1423 return 0;
1424 string_list_append(list, remote->name);
1425 }
1426 return 1;
1427 }
1428
1429 static void add_options_to_argv(struct argv_array *argv)
1430 {
1431 if (dry_run)
1432 argv_array_push(argv, "--dry-run");
1433 if (prune != -1)
1434 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1435 if (prune_tags != -1)
1436 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1437 if (update_head_ok)
1438 argv_array_push(argv, "--update-head-ok");
1439 if (force)
1440 argv_array_push(argv, "--force");
1441 if (keep)
1442 argv_array_push(argv, "--keep");
1443 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1444 argv_array_push(argv, "--recurse-submodules");
1445 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1446 argv_array_push(argv, "--recurse-submodules=on-demand");
1447 if (tags == TAGS_SET)
1448 argv_array_push(argv, "--tags");
1449 else if (tags == TAGS_UNSET)
1450 argv_array_push(argv, "--no-tags");
1451 if (verbosity >= 2)
1452 argv_array_push(argv, "-v");
1453 if (verbosity >= 1)
1454 argv_array_push(argv, "-v");
1455 else if (verbosity < 0)
1456 argv_array_push(argv, "-q");
1457
1458 }
1459
1460 static int fetch_multiple(struct string_list *list)
1461 {
1462 int i, result = 0;
1463 struct argv_array argv = ARGV_ARRAY_INIT;
1464
1465 if (!append && !dry_run) {
1466 int errcode = truncate_fetch_head();
1467 if (errcode)
1468 return errcode;
1469 }
1470
1471 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
1472 add_options_to_argv(&argv);
1473
1474 for (i = 0; i < list->nr; i++) {
1475 const char *name = list->items[i].string;
1476 argv_array_push(&argv, name);
1477 if (verbosity >= 0)
1478 printf(_("Fetching %s\n"), name);
1479 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1480 error(_("Could not fetch %s"), name);
1481 result = 1;
1482 }
1483 argv_array_pop(&argv);
1484 }
1485
1486 argv_array_clear(&argv);
1487 return result;
1488 }
1489
1490 /*
1491 * Fetching from the promisor remote should use the given filter-spec
1492 * or inherit the default filter-spec from the config.
1493 */
1494 static inline void fetch_one_setup_partial(struct remote *remote)
1495 {
1496 /*
1497 * Explicit --no-filter argument overrides everything, regardless
1498 * of any prior partial clones and fetches.
1499 */
1500 if (filter_options.no_filter)
1501 return;
1502
1503 /*
1504 * If no prior partial clone/fetch and the current fetch DID NOT
1505 * request a partial-fetch, do a normal fetch.
1506 */
1507 if (!repository_format_partial_clone && !filter_options.choice)
1508 return;
1509
1510 /*
1511 * If this is the FIRST partial-fetch request, we enable partial
1512 * on this repo and remember the given filter-spec as the default
1513 * for subsequent fetches to this remote.
1514 */
1515 if (!repository_format_partial_clone && filter_options.choice) {
1516 partial_clone_register(remote->name, &filter_options);
1517 return;
1518 }
1519
1520 /*
1521 * We are currently limited to only ONE promisor remote and only
1522 * allow partial-fetches from the promisor remote.
1523 */
1524 if (strcmp(remote->name, repository_format_partial_clone)) {
1525 if (filter_options.choice)
1526 die(_("--filter can only be used with the remote "
1527 "configured in extensions.partialClone"));
1528 return;
1529 }
1530
1531 /*
1532 * Do a partial-fetch from the promisor remote using either the
1533 * explicitly given filter-spec or inherit the filter-spec from
1534 * the config.
1535 */
1536 if (!filter_options.choice)
1537 partial_clone_get_default_filter_spec(&filter_options);
1538 return;
1539 }
1540
1541 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1542 {
1543 struct refspec rs = REFSPEC_INIT_FETCH;
1544 int i;
1545 int exit_code;
1546 int maybe_prune_tags;
1547 int remote_via_config = remote_is_configured(remote, 0);
1548
1549 if (!remote)
1550 die(_("No remote repository specified. Please, specify either a URL or a\n"
1551 "remote name from which new revisions should be fetched."));
1552
1553 gtransport = prepare_transport(remote, 1);
1554
1555 if (prune < 0) {
1556 /* no command line request */
1557 if (0 <= remote->prune)
1558 prune = remote->prune;
1559 else if (0 <= fetch_prune_config)
1560 prune = fetch_prune_config;
1561 else
1562 prune = PRUNE_BY_DEFAULT;
1563 }
1564
1565 if (prune_tags < 0) {
1566 /* no command line request */
1567 if (0 <= remote->prune_tags)
1568 prune_tags = remote->prune_tags;
1569 else if (0 <= fetch_prune_tags_config)
1570 prune_tags = fetch_prune_tags_config;
1571 else
1572 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1573 }
1574
1575 maybe_prune_tags = prune_tags_ok && prune_tags;
1576 if (maybe_prune_tags && remote_via_config)
1577 refspec_append(&remote->fetch, TAG_REFSPEC);
1578
1579 if (maybe_prune_tags && (argc || !remote_via_config))
1580 refspec_append(&rs, TAG_REFSPEC);
1581
1582 for (i = 0; i < argc; i++) {
1583 if (!strcmp(argv[i], "tag")) {
1584 char *tag;
1585 i++;
1586 if (i >= argc)
1587 die(_("You need to specify a tag name."));
1588
1589 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1590 argv[i], argv[i]);
1591 refspec_append(&rs, tag);
1592 free(tag);
1593 } else {
1594 refspec_append(&rs, argv[i]);
1595 }
1596 }
1597
1598 if (server_options.nr)
1599 gtransport->server_options = &server_options;
1600
1601 sigchain_push_common(unlock_pack_on_signal);
1602 atexit(unlock_pack);
1603 sigchain_push(SIGPIPE, SIG_IGN);
1604 exit_code = do_fetch(gtransport, &rs);
1605 sigchain_pop(SIGPIPE);
1606 refspec_clear(&rs);
1607 transport_disconnect(gtransport);
1608 gtransport = NULL;
1609 return exit_code;
1610 }
1611
1612 int cmd_fetch(int argc, const char **argv, const char *prefix)
1613 {
1614 int i;
1615 struct string_list list = STRING_LIST_INIT_DUP;
1616 struct remote *remote = NULL;
1617 int result = 0;
1618 int prune_tags_ok = 1;
1619 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1620
1621 packet_trace_identity("fetch");
1622
1623 fetch_if_missing = 0;
1624
1625 /* Record the command line for the reflog */
1626 strbuf_addstr(&default_rla, "fetch");
1627 for (i = 1; i < argc; i++)
1628 strbuf_addf(&default_rla, " %s", argv[i]);
1629
1630 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1631 git_config(git_fetch_config, NULL);
1632
1633 argc = parse_options(argc, argv, prefix,
1634 builtin_fetch_options, builtin_fetch_usage, 0);
1635
1636 if (deepen_relative) {
1637 if (deepen_relative < 0)
1638 die(_("Negative depth in --deepen is not supported"));
1639 if (depth)
1640 die(_("--deepen and --depth are mutually exclusive"));
1641 depth = xstrfmt("%d", deepen_relative);
1642 }
1643 if (unshallow) {
1644 if (depth)
1645 die(_("--depth and --unshallow cannot be used together"));
1646 else if (!is_repository_shallow(the_repository))
1647 die(_("--unshallow on a complete repository does not make sense"));
1648 else
1649 depth = xstrfmt("%d", INFINITE_DEPTH);
1650 }
1651
1652 /* no need to be strict, transport_set_option() will validate it again */
1653 if (depth && atoi(depth) < 1)
1654 die(_("depth %s is not a positive number"), depth);
1655 if (depth || deepen_since || deepen_not.nr)
1656 deepen = 1;
1657
1658 if (filter_options.choice && !repository_format_partial_clone)
1659 die("--filter can only be used when extensions.partialClone is set");
1660
1661 if (all) {
1662 if (argc == 1)
1663 die(_("fetch --all does not take a repository argument"));
1664 else if (argc > 1)
1665 die(_("fetch --all does not make sense with refspecs"));
1666 (void) for_each_remote(get_one_remote_for_fetch, &list);
1667 } else if (argc == 0) {
1668 /* No arguments -- use default remote */
1669 remote = remote_get(NULL);
1670 } else if (multiple) {
1671 /* All arguments are assumed to be remotes or groups */
1672 for (i = 0; i < argc; i++)
1673 if (!add_remote_or_group(argv[i], &list))
1674 die(_("No such remote or remote group: %s"), argv[i]);
1675 } else {
1676 /* Single remote or group */
1677 (void) add_remote_or_group(argv[0], &list);
1678 if (list.nr > 1) {
1679 /* More than one remote */
1680 if (argc > 1)
1681 die(_("Fetching a group and specifying refspecs does not make sense"));
1682 } else {
1683 /* Zero or one remotes */
1684 remote = remote_get(argv[0]);
1685 prune_tags_ok = (argc == 1);
1686 argc--;
1687 argv++;
1688 }
1689 }
1690
1691 if (remote) {
1692 if (filter_options.choice || repository_format_partial_clone)
1693 fetch_one_setup_partial(remote);
1694 result = fetch_one(remote, argc, argv, prune_tags_ok);
1695 } else {
1696 if (filter_options.choice)
1697 die(_("--filter can only be used with the remote "
1698 "configured in extensions.partialclone"));
1699 /* TODO should this also die if we have a previous partial-clone? */
1700 result = fetch_multiple(&list);
1701 }
1702
1703 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1704 struct argv_array options = ARGV_ARRAY_INIT;
1705
1706 add_options_to_argv(&options);
1707 result = fetch_populated_submodules(the_repository,
1708 &options,
1709 submodule_prefix,
1710 recurse_submodules,
1711 recurse_submodules_default,
1712 verbosity < 0,
1713 max_children);
1714 argv_array_clear(&options);
1715 }
1716
1717 string_list_clear(&list, 0);
1718
1719 prepare_repo_settings(the_repository);
1720 if (the_repository->settings.fetch_write_commit_graph) {
1721 int commit_graph_flags = COMMIT_GRAPH_SPLIT;
1722 struct split_commit_graph_opts split_opts;
1723 memset(&split_opts, 0, sizeof(struct split_commit_graph_opts));
1724
1725 if (progress)
1726 commit_graph_flags |= COMMIT_GRAPH_PROGRESS;
1727
1728 write_commit_graph_reachable(get_object_directory(),
1729 commit_graph_flags,
1730 &split_opts);
1731 }
1732
1733 close_object_store(the_repository->objects);
1734
1735 if (enable_auto_gc) {
1736 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1737 if (verbosity < 0)
1738 argv_array_push(&argv_gc_auto, "--quiet");
1739 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1740 argv_array_clear(&argv_gc_auto);
1741 }
1742
1743 return result;
1744 }