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Merge branch 'cb/fetch-set-upstream'
[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 #include "branch.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;
55 static int verbosity, deepen_relative, set_upstream;
56 static int progress = -1;
57 static int enable_auto_gc = 1;
58 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
59 static int max_children = 1;
60 static enum transport_family family;
61 static const char *depth;
62 static const char *deepen_since;
63 static const char *upload_pack;
64 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
65 static struct strbuf default_rla = STRBUF_INIT;
66 static struct transport *gtransport;
67 static struct transport *gsecondary;
68 static const char *submodule_prefix = "";
69 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
70 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
71 static int shown_url = 0;
72 static struct refspec refmap = REFSPEC_INIT_FETCH;
73 static struct list_objects_filter_options filter_options;
74 static struct string_list server_options = STRING_LIST_INIT_DUP;
75 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
76
77 static int git_fetch_config(const char *k, const char *v, void *cb)
78 {
79 if (!strcmp(k, "fetch.prune")) {
80 fetch_prune_config = git_config_bool(k, v);
81 return 0;
82 }
83
84 if (!strcmp(k, "fetch.prunetags")) {
85 fetch_prune_tags_config = git_config_bool(k, v);
86 return 0;
87 }
88
89 if (!strcmp(k, "fetch.showforcedupdates")) {
90 fetch_show_forced_updates = git_config_bool(k, v);
91 return 0;
92 }
93
94 if (!strcmp(k, "submodule.recurse")) {
95 int r = git_config_bool(k, v) ?
96 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
97 recurse_submodules = r;
98 }
99
100 if (!strcmp(k, "submodule.fetchjobs")) {
101 max_children = parse_submodule_fetchjobs(k, v);
102 return 0;
103 } else if (!strcmp(k, "fetch.recursesubmodules")) {
104 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
105 return 0;
106 }
107
108 return git_default_config(k, v, cb);
109 }
110
111 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
112 {
113 BUG_ON_OPT_NEG(unset);
114
115 /*
116 * "git fetch --refmap='' origin foo"
117 * can be used to tell the command not to store anywhere
118 */
119 refspec_append(&refmap, arg);
120
121 return 0;
122 }
123
124 static struct option builtin_fetch_options[] = {
125 OPT__VERBOSITY(&verbosity),
126 OPT_BOOL(0, "all", &all,
127 N_("fetch from all remotes")),
128 OPT_BOOL(0, "set-upstream", &set_upstream,
129 N_("set upstream for git pull/fetch")),
130 OPT_BOOL('a', "append", &append,
131 N_("append to .git/FETCH_HEAD instead of overwriting")),
132 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
133 N_("path to upload pack on remote end")),
134 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
135 OPT_BOOL('m', "multiple", &multiple,
136 N_("fetch from multiple remotes")),
137 OPT_SET_INT('t', "tags", &tags,
138 N_("fetch all tags and associated objects"), TAGS_SET),
139 OPT_SET_INT('n', NULL, &tags,
140 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
141 OPT_INTEGER('j', "jobs", &max_children,
142 N_("number of submodules fetched in parallel")),
143 OPT_BOOL('p', "prune", &prune,
144 N_("prune remote-tracking branches no longer on remote")),
145 OPT_BOOL('P', "prune-tags", &prune_tags,
146 N_("prune local tags no longer on remote and clobber changed tags")),
147 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
148 N_("control recursive fetching of submodules"),
149 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
150 OPT_BOOL(0, "dry-run", &dry_run,
151 N_("dry run")),
152 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
153 OPT_BOOL('u', "update-head-ok", &update_head_ok,
154 N_("allow updating of HEAD ref")),
155 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
156 OPT_STRING(0, "depth", &depth, N_("depth"),
157 N_("deepen history of shallow clone")),
158 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
159 N_("deepen history of shallow repository based on time")),
160 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
161 N_("deepen history of shallow clone, excluding rev")),
162 OPT_INTEGER(0, "deepen", &deepen_relative,
163 N_("deepen history of shallow clone")),
164 OPT_SET_INT_F(0, "unshallow", &unshallow,
165 N_("convert to a complete repository"),
166 1, PARSE_OPT_NONEG),
167 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
168 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
169 { OPTION_CALLBACK, 0, "recurse-submodules-default",
170 &recurse_submodules_default, N_("on-demand"),
171 N_("default for recursive fetching of submodules "
172 "(lower priority than config files)"),
173 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
174 OPT_BOOL(0, "update-shallow", &update_shallow,
175 N_("accept refs that update .git/shallow")),
176 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
177 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
178 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
179 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
180 TRANSPORT_FAMILY_IPV4),
181 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
182 TRANSPORT_FAMILY_IPV6),
183 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
184 N_("report that we have only objects reachable from this object")),
185 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
186 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
187 N_("run 'gc --auto' after fetching")),
188 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
189 N_("check for forced-updates on all updated branches")),
190 OPT_END()
191 };
192
193 static void unlock_pack(void)
194 {
195 if (gtransport)
196 transport_unlock_pack(gtransport);
197 if (gsecondary)
198 transport_unlock_pack(gsecondary);
199 }
200
201 static void unlock_pack_on_signal(int signo)
202 {
203 unlock_pack();
204 sigchain_pop(signo);
205 raise(signo);
206 }
207
208 static void add_merge_config(struct ref **head,
209 const struct ref *remote_refs,
210 struct branch *branch,
211 struct ref ***tail)
212 {
213 int i;
214
215 for (i = 0; i < branch->merge_nr; i++) {
216 struct ref *rm, **old_tail = *tail;
217 struct refspec_item refspec;
218
219 for (rm = *head; rm; rm = rm->next) {
220 if (branch_merge_matches(branch, i, rm->name)) {
221 rm->fetch_head_status = FETCH_HEAD_MERGE;
222 break;
223 }
224 }
225 if (rm)
226 continue;
227
228 /*
229 * Not fetched to a remote-tracking branch? We need to fetch
230 * it anyway to allow this branch's "branch.$name.merge"
231 * to be honored by 'git pull', but we do not have to
232 * fail if branch.$name.merge is misconfigured to point
233 * at a nonexisting branch. If we were indeed called by
234 * 'git pull', it will notice the misconfiguration because
235 * there is no entry in the resulting FETCH_HEAD marked
236 * for merging.
237 */
238 memset(&refspec, 0, sizeof(refspec));
239 refspec.src = branch->merge[i]->src;
240 get_fetch_map(remote_refs, &refspec, tail, 1);
241 for (rm = *old_tail; rm; rm = rm->next)
242 rm->fetch_head_status = FETCH_HEAD_MERGE;
243 }
244 }
245
246 static int will_fetch(struct ref **head, const unsigned char *sha1)
247 {
248 struct ref *rm = *head;
249 while (rm) {
250 if (hasheq(rm->old_oid.hash, sha1))
251 return 1;
252 rm = rm->next;
253 }
254 return 0;
255 }
256
257 struct refname_hash_entry {
258 struct hashmap_entry ent; /* must be the first member */
259 struct object_id oid;
260 int ignore;
261 char refname[FLEX_ARRAY];
262 };
263
264 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
265 const void *e1_,
266 const void *e2_,
267 const void *keydata)
268 {
269 const struct refname_hash_entry *e1 = e1_;
270 const struct refname_hash_entry *e2 = e2_;
271
272 return strcmp(e1->refname, keydata ? keydata : e2->refname);
273 }
274
275 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
276 const char *refname,
277 const struct object_id *oid)
278 {
279 struct refname_hash_entry *ent;
280 size_t len = strlen(refname);
281
282 FLEX_ALLOC_MEM(ent, refname, refname, len);
283 hashmap_entry_init(ent, strhash(refname));
284 oidcpy(&ent->oid, oid);
285 hashmap_add(map, ent);
286 return ent;
287 }
288
289 static int add_one_refname(const char *refname,
290 const struct object_id *oid,
291 int flag, void *cbdata)
292 {
293 struct hashmap *refname_map = cbdata;
294
295 (void) refname_hash_add(refname_map, refname, oid);
296 return 0;
297 }
298
299 static void refname_hash_init(struct hashmap *map)
300 {
301 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
302 }
303
304 static int refname_hash_exists(struct hashmap *map, const char *refname)
305 {
306 return !!hashmap_get_from_hash(map, strhash(refname), refname);
307 }
308
309 static void clear_item(struct refname_hash_entry *item)
310 {
311 item->ignore = 1;
312 }
313
314 static void find_non_local_tags(const struct ref *refs,
315 struct ref **head,
316 struct ref ***tail)
317 {
318 struct hashmap existing_refs;
319 struct hashmap remote_refs;
320 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
321 struct string_list_item *remote_ref_item;
322 const struct ref *ref;
323 struct refname_hash_entry *item = NULL;
324
325 refname_hash_init(&existing_refs);
326 refname_hash_init(&remote_refs);
327
328 for_each_ref(add_one_refname, &existing_refs);
329 for (ref = refs; ref; ref = ref->next) {
330 if (!starts_with(ref->name, "refs/tags/"))
331 continue;
332
333 /*
334 * The peeled ref always follows the matching base
335 * ref, so if we see a peeled ref that we don't want
336 * to fetch then we can mark the ref entry in the list
337 * as one to ignore by setting util to NULL.
338 */
339 if (ends_with(ref->name, "^{}")) {
340 if (item &&
341 !has_object_file_with_flags(&ref->old_oid,
342 OBJECT_INFO_QUICK) &&
343 !will_fetch(head, ref->old_oid.hash) &&
344 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
345 !will_fetch(head, item->oid.hash))
346 clear_item(item);
347 item = NULL;
348 continue;
349 }
350
351 /*
352 * If item is non-NULL here, then we previously saw a
353 * ref not followed by a peeled reference, so we need
354 * to check if it is a lightweight tag that we want to
355 * fetch.
356 */
357 if (item &&
358 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
359 !will_fetch(head, item->oid.hash))
360 clear_item(item);
361
362 item = NULL;
363
364 /* skip duplicates and refs that we already have */
365 if (refname_hash_exists(&remote_refs, ref->name) ||
366 refname_hash_exists(&existing_refs, ref->name))
367 continue;
368
369 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
370 string_list_insert(&remote_refs_list, ref->name);
371 }
372 hashmap_free(&existing_refs, 1);
373
374 /*
375 * We may have a final lightweight tag that needs to be
376 * checked to see if it needs fetching.
377 */
378 if (item &&
379 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
380 !will_fetch(head, item->oid.hash))
381 clear_item(item);
382
383 /*
384 * For all the tags in the remote_refs_list,
385 * add them to the list of refs to be fetched
386 */
387 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
388 const char *refname = remote_ref_item->string;
389 struct ref *rm;
390
391 item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
392 if (!item)
393 BUG("unseen remote ref?");
394
395 /* Unless we have already decided to ignore this item... */
396 if (item->ignore)
397 continue;
398
399 rm = alloc_ref(item->refname);
400 rm->peer_ref = alloc_ref(item->refname);
401 oidcpy(&rm->old_oid, &item->oid);
402 **tail = rm;
403 *tail = &rm->next;
404 }
405 hashmap_free(&remote_refs, 1);
406 string_list_clear(&remote_refs_list, 0);
407 }
408
409 static struct ref *get_ref_map(struct remote *remote,
410 const struct ref *remote_refs,
411 struct refspec *rs,
412 int tags, int *autotags)
413 {
414 int i;
415 struct ref *rm;
416 struct ref *ref_map = NULL;
417 struct ref **tail = &ref_map;
418
419 /* opportunistically-updated references: */
420 struct ref *orefs = NULL, **oref_tail = &orefs;
421
422 struct hashmap existing_refs;
423
424 if (rs->nr) {
425 struct refspec *fetch_refspec;
426
427 for (i = 0; i < rs->nr; i++) {
428 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
429 if (rs->items[i].dst && rs->items[i].dst[0])
430 *autotags = 1;
431 }
432 /* Merge everything on the command line (but not --tags) */
433 for (rm = ref_map; rm; rm = rm->next)
434 rm->fetch_head_status = FETCH_HEAD_MERGE;
435
436 /*
437 * For any refs that we happen to be fetching via
438 * command-line arguments, the destination ref might
439 * have been missing or have been different than the
440 * remote-tracking ref that would be derived from the
441 * configured refspec. In these cases, we want to
442 * take the opportunity to update their configured
443 * remote-tracking reference. However, we do not want
444 * to mention these entries in FETCH_HEAD at all, as
445 * they would simply be duplicates of existing
446 * entries, so we set them FETCH_HEAD_IGNORE below.
447 *
448 * We compute these entries now, based only on the
449 * refspecs specified on the command line. But we add
450 * them to the list following the refspecs resulting
451 * from the tags option so that one of the latter,
452 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
453 * by ref_remove_duplicates() in favor of one of these
454 * opportunistic entries with FETCH_HEAD_IGNORE.
455 */
456 if (refmap.nr)
457 fetch_refspec = &refmap;
458 else
459 fetch_refspec = &remote->fetch;
460
461 for (i = 0; i < fetch_refspec->nr; i++)
462 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
463 } else if (refmap.nr) {
464 die("--refmap option is only meaningful with command-line refspec(s).");
465 } else {
466 /* Use the defaults */
467 struct branch *branch = branch_get(NULL);
468 int has_merge = branch_has_merge_config(branch);
469 if (remote &&
470 (remote->fetch.nr ||
471 /* Note: has_merge implies non-NULL branch->remote_name */
472 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
473 for (i = 0; i < remote->fetch.nr; i++) {
474 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
475 if (remote->fetch.items[i].dst &&
476 remote->fetch.items[i].dst[0])
477 *autotags = 1;
478 if (!i && !has_merge && ref_map &&
479 !remote->fetch.items[0].pattern)
480 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
481 }
482 /*
483 * if the remote we're fetching from is the same
484 * as given in branch.<name>.remote, we add the
485 * ref given in branch.<name>.merge, too.
486 *
487 * Note: has_merge implies non-NULL branch->remote_name
488 */
489 if (has_merge &&
490 !strcmp(branch->remote_name, remote->name))
491 add_merge_config(&ref_map, remote_refs, branch, &tail);
492 } else {
493 ref_map = get_remote_ref(remote_refs, "HEAD");
494 if (!ref_map)
495 die(_("Couldn't find remote ref HEAD"));
496 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
497 tail = &ref_map->next;
498 }
499 }
500
501 if (tags == TAGS_SET)
502 /* also fetch all tags */
503 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
504 else if (tags == TAGS_DEFAULT && *autotags)
505 find_non_local_tags(remote_refs, &ref_map, &tail);
506
507 /* Now append any refs to be updated opportunistically: */
508 *tail = orefs;
509 for (rm = orefs; rm; rm = rm->next) {
510 rm->fetch_head_status = FETCH_HEAD_IGNORE;
511 tail = &rm->next;
512 }
513
514 ref_map = ref_remove_duplicates(ref_map);
515
516 refname_hash_init(&existing_refs);
517 for_each_ref(add_one_refname, &existing_refs);
518
519 for (rm = ref_map; rm; rm = rm->next) {
520 if (rm->peer_ref) {
521 const char *refname = rm->peer_ref->name;
522 struct refname_hash_entry *peer_item;
523
524 peer_item = hashmap_get_from_hash(&existing_refs,
525 strhash(refname),
526 refname);
527 if (peer_item) {
528 struct object_id *old_oid = &peer_item->oid;
529 oidcpy(&rm->peer_ref->old_oid, old_oid);
530 }
531 }
532 }
533 hashmap_free(&existing_refs, 1);
534
535 return ref_map;
536 }
537
538 #define STORE_REF_ERROR_OTHER 1
539 #define STORE_REF_ERROR_DF_CONFLICT 2
540
541 static int s_update_ref(const char *action,
542 struct ref *ref,
543 int check_old)
544 {
545 char *msg;
546 char *rla = getenv("GIT_REFLOG_ACTION");
547 struct ref_transaction *transaction;
548 struct strbuf err = STRBUF_INIT;
549 int ret, df_conflict = 0;
550
551 if (dry_run)
552 return 0;
553 if (!rla)
554 rla = default_rla.buf;
555 msg = xstrfmt("%s: %s", rla, action);
556
557 transaction = ref_transaction_begin(&err);
558 if (!transaction ||
559 ref_transaction_update(transaction, ref->name,
560 &ref->new_oid,
561 check_old ? &ref->old_oid : NULL,
562 0, msg, &err))
563 goto fail;
564
565 ret = ref_transaction_commit(transaction, &err);
566 if (ret) {
567 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
568 goto fail;
569 }
570
571 ref_transaction_free(transaction);
572 strbuf_release(&err);
573 free(msg);
574 return 0;
575 fail:
576 ref_transaction_free(transaction);
577 error("%s", err.buf);
578 strbuf_release(&err);
579 free(msg);
580 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
581 : STORE_REF_ERROR_OTHER;
582 }
583
584 static int refcol_width = 10;
585 static int compact_format;
586
587 static void adjust_refcol_width(const struct ref *ref)
588 {
589 int max, rlen, llen, len;
590
591 /* uptodate lines are only shown on high verbosity level */
592 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
593 return;
594
595 max = term_columns();
596 rlen = utf8_strwidth(prettify_refname(ref->name));
597
598 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
599
600 /*
601 * rough estimation to see if the output line is too long and
602 * should not be counted (we can't do precise calculation
603 * anyway because we don't know if the error explanation part
604 * will be printed in update_local_ref)
605 */
606 if (compact_format) {
607 llen = 0;
608 max = max * 2 / 3;
609 }
610 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
611 if (len >= max)
612 return;
613
614 /*
615 * Not precise calculation for compact mode because '*' can
616 * appear on the left hand side of '->' and shrink the column
617 * back.
618 */
619 if (refcol_width < rlen)
620 refcol_width = rlen;
621 }
622
623 static void prepare_format_display(struct ref *ref_map)
624 {
625 struct ref *rm;
626 const char *format = "full";
627
628 git_config_get_string_const("fetch.output", &format);
629 if (!strcasecmp(format, "full"))
630 compact_format = 0;
631 else if (!strcasecmp(format, "compact"))
632 compact_format = 1;
633 else
634 die(_("configuration fetch.output contains invalid value %s"),
635 format);
636
637 for (rm = ref_map; rm; rm = rm->next) {
638 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
639 !rm->peer_ref ||
640 !strcmp(rm->name, "HEAD"))
641 continue;
642
643 adjust_refcol_width(rm);
644 }
645 }
646
647 static void print_remote_to_local(struct strbuf *display,
648 const char *remote, const char *local)
649 {
650 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
651 }
652
653 static int find_and_replace(struct strbuf *haystack,
654 const char *needle,
655 const char *placeholder)
656 {
657 const char *p = NULL;
658 int plen, nlen;
659
660 nlen = strlen(needle);
661 if (ends_with(haystack->buf, needle))
662 p = haystack->buf + haystack->len - nlen;
663 else
664 p = strstr(haystack->buf, needle);
665 if (!p)
666 return 0;
667
668 if (p > haystack->buf && p[-1] != '/')
669 return 0;
670
671 plen = strlen(p);
672 if (plen > nlen && p[nlen] != '/')
673 return 0;
674
675 strbuf_splice(haystack, p - haystack->buf, nlen,
676 placeholder, strlen(placeholder));
677 return 1;
678 }
679
680 static void print_compact(struct strbuf *display,
681 const char *remote, const char *local)
682 {
683 struct strbuf r = STRBUF_INIT;
684 struct strbuf l = STRBUF_INIT;
685
686 if (!strcmp(remote, local)) {
687 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
688 return;
689 }
690
691 strbuf_addstr(&r, remote);
692 strbuf_addstr(&l, local);
693
694 if (!find_and_replace(&r, local, "*"))
695 find_and_replace(&l, remote, "*");
696 print_remote_to_local(display, r.buf, l.buf);
697
698 strbuf_release(&r);
699 strbuf_release(&l);
700 }
701
702 static void format_display(struct strbuf *display, char code,
703 const char *summary, const char *error,
704 const char *remote, const char *local,
705 int summary_width)
706 {
707 int width = (summary_width + strlen(summary) - gettext_width(summary));
708
709 strbuf_addf(display, "%c %-*s ", code, width, summary);
710 if (!compact_format)
711 print_remote_to_local(display, remote, local);
712 else
713 print_compact(display, remote, local);
714 if (error)
715 strbuf_addf(display, " (%s)", error);
716 }
717
718 static int update_local_ref(struct ref *ref,
719 const char *remote,
720 const struct ref *remote_ref,
721 struct strbuf *display,
722 int summary_width)
723 {
724 struct commit *current = NULL, *updated;
725 enum object_type type;
726 struct branch *current_branch = branch_get(NULL);
727 const char *pretty_ref = prettify_refname(ref->name);
728 int fast_forward = 0;
729
730 type = oid_object_info(the_repository, &ref->new_oid, NULL);
731 if (type < 0)
732 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
733
734 if (oideq(&ref->old_oid, &ref->new_oid)) {
735 if (verbosity > 0)
736 format_display(display, '=', _("[up to date]"), NULL,
737 remote, pretty_ref, summary_width);
738 return 0;
739 }
740
741 if (current_branch &&
742 !strcmp(ref->name, current_branch->name) &&
743 !(update_head_ok || is_bare_repository()) &&
744 !is_null_oid(&ref->old_oid)) {
745 /*
746 * If this is the head, and it's not okay to update
747 * the head, and the old value of the head isn't empty...
748 */
749 format_display(display, '!', _("[rejected]"),
750 _("can't fetch in current branch"),
751 remote, pretty_ref, summary_width);
752 return 1;
753 }
754
755 if (!is_null_oid(&ref->old_oid) &&
756 starts_with(ref->name, "refs/tags/")) {
757 if (force || ref->force) {
758 int r;
759 r = s_update_ref("updating tag", ref, 0);
760 format_display(display, r ? '!' : 't', _("[tag update]"),
761 r ? _("unable to update local ref") : NULL,
762 remote, pretty_ref, summary_width);
763 return r;
764 } else {
765 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
766 remote, pretty_ref, summary_width);
767 return 1;
768 }
769 }
770
771 current = lookup_commit_reference_gently(the_repository,
772 &ref->old_oid, 1);
773 updated = lookup_commit_reference_gently(the_repository,
774 &ref->new_oid, 1);
775 if (!current || !updated) {
776 const char *msg;
777 const char *what;
778 int r;
779 /*
780 * Nicely describe the new ref we're fetching.
781 * Base this on the remote's ref name, as it's
782 * more likely to follow a standard layout.
783 */
784 const char *name = remote_ref ? remote_ref->name : "";
785 if (starts_with(name, "refs/tags/")) {
786 msg = "storing tag";
787 what = _("[new tag]");
788 } else if (starts_with(name, "refs/heads/")) {
789 msg = "storing head";
790 what = _("[new branch]");
791 } else {
792 msg = "storing ref";
793 what = _("[new ref]");
794 }
795
796 r = s_update_ref(msg, ref, 0);
797 format_display(display, r ? '!' : '*', what,
798 r ? _("unable to update local ref") : NULL,
799 remote, pretty_ref, summary_width);
800 return r;
801 }
802
803 if (fetch_show_forced_updates) {
804 uint64_t t_before = getnanotime();
805 fast_forward = in_merge_bases(current, updated);
806 forced_updates_ms += (getnanotime() - t_before) / 1000000;
807 } else {
808 fast_forward = 1;
809 }
810
811 if (fast_forward) {
812 struct strbuf quickref = STRBUF_INIT;
813 int r;
814
815 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
816 strbuf_addstr(&quickref, "..");
817 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
818 r = s_update_ref("fast-forward", ref, 1);
819 format_display(display, r ? '!' : ' ', quickref.buf,
820 r ? _("unable to update local ref") : NULL,
821 remote, pretty_ref, summary_width);
822 strbuf_release(&quickref);
823 return r;
824 } else if (force || ref->force) {
825 struct strbuf quickref = STRBUF_INIT;
826 int r;
827 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
828 strbuf_addstr(&quickref, "...");
829 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
830 r = s_update_ref("forced-update", ref, 1);
831 format_display(display, r ? '!' : '+', quickref.buf,
832 r ? _("unable to update local ref") : _("forced update"),
833 remote, pretty_ref, summary_width);
834 strbuf_release(&quickref);
835 return r;
836 } else {
837 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
838 remote, pretty_ref, summary_width);
839 return 1;
840 }
841 }
842
843 static int iterate_ref_map(void *cb_data, struct object_id *oid)
844 {
845 struct ref **rm = cb_data;
846 struct ref *ref = *rm;
847
848 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
849 ref = ref->next;
850 if (!ref)
851 return -1; /* end of the list */
852 *rm = ref->next;
853 oidcpy(oid, &ref->old_oid);
854 return 0;
855 }
856
857 static const char warn_show_forced_updates[] =
858 N_("Fetch normally indicates which branches had a forced update,\n"
859 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
860 "flag or run 'git config fetch.showForcedUpdates true'.");
861 static const char warn_time_show_forced_updates[] =
862 N_("It took %.2f seconds to check forced updates. You can use\n"
863 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
864 " to avoid this check.\n");
865
866 static int store_updated_refs(const char *raw_url, const char *remote_name,
867 int connectivity_checked, struct ref *ref_map)
868 {
869 FILE *fp;
870 struct commit *commit;
871 int url_len, i, rc = 0;
872 struct strbuf note = STRBUF_INIT;
873 const char *what, *kind;
874 struct ref *rm;
875 char *url;
876 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
877 int want_status;
878 int summary_width = transport_summary_width(ref_map);
879
880 fp = fopen(filename, "a");
881 if (!fp)
882 return error_errno(_("cannot open %s"), filename);
883
884 if (raw_url)
885 url = transport_anonymize_url(raw_url);
886 else
887 url = xstrdup("foreign");
888
889 if (!connectivity_checked) {
890 rm = ref_map;
891 if (check_connected(iterate_ref_map, &rm, NULL)) {
892 rc = error(_("%s did not send all necessary objects\n"), url);
893 goto abort;
894 }
895 }
896
897 prepare_format_display(ref_map);
898
899 /*
900 * We do a pass for each fetch_head_status type in their enum order, so
901 * merged entries are written before not-for-merge. That lets readers
902 * use FETCH_HEAD as a refname to refer to the ref to be merged.
903 */
904 for (want_status = FETCH_HEAD_MERGE;
905 want_status <= FETCH_HEAD_IGNORE;
906 want_status++) {
907 for (rm = ref_map; rm; rm = rm->next) {
908 struct ref *ref = NULL;
909 const char *merge_status_marker = "";
910
911 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
912 if (want_status == FETCH_HEAD_MERGE)
913 warning(_("reject %s because shallow roots are not allowed to be updated"),
914 rm->peer_ref ? rm->peer_ref->name : rm->name);
915 continue;
916 }
917
918 commit = lookup_commit_reference_gently(the_repository,
919 &rm->old_oid,
920 1);
921 if (!commit)
922 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
923
924 if (rm->fetch_head_status != want_status)
925 continue;
926
927 if (rm->peer_ref) {
928 ref = alloc_ref(rm->peer_ref->name);
929 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
930 oidcpy(&ref->new_oid, &rm->old_oid);
931 ref->force = rm->peer_ref->force;
932 }
933
934 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
935 check_for_new_submodule_commits(&rm->old_oid);
936
937 if (!strcmp(rm->name, "HEAD")) {
938 kind = "";
939 what = "";
940 }
941 else if (starts_with(rm->name, "refs/heads/")) {
942 kind = "branch";
943 what = rm->name + 11;
944 }
945 else if (starts_with(rm->name, "refs/tags/")) {
946 kind = "tag";
947 what = rm->name + 10;
948 }
949 else if (starts_with(rm->name, "refs/remotes/")) {
950 kind = "remote-tracking branch";
951 what = rm->name + 13;
952 }
953 else {
954 kind = "";
955 what = rm->name;
956 }
957
958 url_len = strlen(url);
959 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
960 ;
961 url_len = i + 1;
962 if (4 < i && !strncmp(".git", url + i - 3, 4))
963 url_len = i - 3;
964
965 strbuf_reset(&note);
966 if (*what) {
967 if (*kind)
968 strbuf_addf(&note, "%s ", kind);
969 strbuf_addf(&note, "'%s' of ", what);
970 }
971 switch (rm->fetch_head_status) {
972 case FETCH_HEAD_NOT_FOR_MERGE:
973 merge_status_marker = "not-for-merge";
974 /* fall-through */
975 case FETCH_HEAD_MERGE:
976 fprintf(fp, "%s\t%s\t%s",
977 oid_to_hex(&rm->old_oid),
978 merge_status_marker,
979 note.buf);
980 for (i = 0; i < url_len; ++i)
981 if ('\n' == url[i])
982 fputs("\\n", fp);
983 else
984 fputc(url[i], fp);
985 fputc('\n', fp);
986 break;
987 default:
988 /* do not write anything to FETCH_HEAD */
989 break;
990 }
991
992 strbuf_reset(&note);
993 if (ref) {
994 rc |= update_local_ref(ref, what, rm, &note,
995 summary_width);
996 free(ref);
997 } else
998 format_display(&note, '*',
999 *kind ? kind : "branch", NULL,
1000 *what ? what : "HEAD",
1001 "FETCH_HEAD", summary_width);
1002 if (note.len) {
1003 if (verbosity >= 0 && !shown_url) {
1004 fprintf(stderr, _("From %.*s\n"),
1005 url_len, url);
1006 shown_url = 1;
1007 }
1008 if (verbosity >= 0)
1009 fprintf(stderr, " %s\n", note.buf);
1010 }
1011 }
1012 }
1013
1014 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1015 error(_("some local refs could not be updated; try running\n"
1016 " 'git remote prune %s' to remove any old, conflicting "
1017 "branches"), remote_name);
1018
1019 if (advice_fetch_show_forced_updates) {
1020 if (!fetch_show_forced_updates) {
1021 warning(_(warn_show_forced_updates));
1022 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1023 warning(_(warn_time_show_forced_updates),
1024 forced_updates_ms / 1000.0);
1025 }
1026 }
1027
1028 abort:
1029 strbuf_release(&note);
1030 free(url);
1031 fclose(fp);
1032 return rc;
1033 }
1034
1035 /*
1036 * We would want to bypass the object transfer altogether if
1037 * everything we are going to fetch already exists and is connected
1038 * locally.
1039 */
1040 static int check_exist_and_connected(struct ref *ref_map)
1041 {
1042 struct ref *rm = ref_map;
1043 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1044 struct ref *r;
1045
1046 /*
1047 * If we are deepening a shallow clone we already have these
1048 * objects reachable. Running rev-list here will return with
1049 * a good (0) exit status and we'll bypass the fetch that we
1050 * really need to perform. Claiming failure now will ensure
1051 * we perform the network exchange to deepen our history.
1052 */
1053 if (deepen)
1054 return -1;
1055
1056 /*
1057 * check_connected() allows objects to merely be promised, but
1058 * we need all direct targets to exist.
1059 */
1060 for (r = rm; r; r = r->next) {
1061 if (!has_object_file(&r->old_oid))
1062 return -1;
1063 }
1064
1065 opt.quiet = 1;
1066 return check_connected(iterate_ref_map, &rm, &opt);
1067 }
1068
1069 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1070 {
1071 int ret = check_exist_and_connected(ref_map);
1072 if (ret)
1073 ret = transport_fetch_refs(transport, ref_map);
1074 if (!ret)
1075 /*
1076 * Keep the new pack's ".keep" file around to allow the caller
1077 * time to update refs to reference the new objects.
1078 */
1079 return 0;
1080 transport_unlock_pack(transport);
1081 return ret;
1082 }
1083
1084 /* Update local refs based on the ref values fetched from a remote */
1085 static int consume_refs(struct transport *transport, struct ref *ref_map)
1086 {
1087 int connectivity_checked = transport->smart_options
1088 ? transport->smart_options->connectivity_checked : 0;
1089 int ret = store_updated_refs(transport->url,
1090 transport->remote->name,
1091 connectivity_checked,
1092 ref_map);
1093 transport_unlock_pack(transport);
1094 return ret;
1095 }
1096
1097 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1098 const char *raw_url)
1099 {
1100 int url_len, i, result = 0;
1101 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1102 char *url;
1103 int summary_width = transport_summary_width(stale_refs);
1104 const char *dangling_msg = dry_run
1105 ? _(" (%s will become dangling)")
1106 : _(" (%s has become dangling)");
1107
1108 if (raw_url)
1109 url = transport_anonymize_url(raw_url);
1110 else
1111 url = xstrdup("foreign");
1112
1113 url_len = strlen(url);
1114 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1115 ;
1116
1117 url_len = i + 1;
1118 if (4 < i && !strncmp(".git", url + i - 3, 4))
1119 url_len = i - 3;
1120
1121 if (!dry_run) {
1122 struct string_list refnames = STRING_LIST_INIT_NODUP;
1123
1124 for (ref = stale_refs; ref; ref = ref->next)
1125 string_list_append(&refnames, ref->name);
1126
1127 result = delete_refs("fetch: prune", &refnames, 0);
1128 string_list_clear(&refnames, 0);
1129 }
1130
1131 if (verbosity >= 0) {
1132 for (ref = stale_refs; ref; ref = ref->next) {
1133 struct strbuf sb = STRBUF_INIT;
1134 if (!shown_url) {
1135 fprintf(stderr, _("From %.*s\n"), url_len, url);
1136 shown_url = 1;
1137 }
1138 format_display(&sb, '-', _("[deleted]"), NULL,
1139 _("(none)"), prettify_refname(ref->name),
1140 summary_width);
1141 fprintf(stderr, " %s\n",sb.buf);
1142 strbuf_release(&sb);
1143 warn_dangling_symref(stderr, dangling_msg, ref->name);
1144 }
1145 }
1146
1147 free(url);
1148 free_refs(stale_refs);
1149 return result;
1150 }
1151
1152 static void check_not_current_branch(struct ref *ref_map)
1153 {
1154 struct branch *current_branch = branch_get(NULL);
1155
1156 if (is_bare_repository() || !current_branch)
1157 return;
1158
1159 for (; ref_map; ref_map = ref_map->next)
1160 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1161 ref_map->peer_ref->name))
1162 die(_("Refusing to fetch into current branch %s "
1163 "of non-bare repository"), current_branch->refname);
1164 }
1165
1166 static int truncate_fetch_head(void)
1167 {
1168 const char *filename = git_path_fetch_head(the_repository);
1169 FILE *fp = fopen_for_writing(filename);
1170
1171 if (!fp)
1172 return error_errno(_("cannot open %s"), filename);
1173 fclose(fp);
1174 return 0;
1175 }
1176
1177 static void set_option(struct transport *transport, const char *name, const char *value)
1178 {
1179 int r = transport_set_option(transport, name, value);
1180 if (r < 0)
1181 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1182 name, value, transport->url);
1183 if (r > 0)
1184 warning(_("Option \"%s\" is ignored for %s\n"),
1185 name, transport->url);
1186 }
1187
1188
1189 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1190 void *cb_data)
1191 {
1192 struct oid_array *oids = cb_data;
1193
1194 oid_array_append(oids, oid);
1195 return 0;
1196 }
1197
1198 static void add_negotiation_tips(struct git_transport_options *smart_options)
1199 {
1200 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1201 int i;
1202
1203 for (i = 0; i < negotiation_tip.nr; i++) {
1204 const char *s = negotiation_tip.items[i].string;
1205 int old_nr;
1206 if (!has_glob_specials(s)) {
1207 struct object_id oid;
1208 if (get_oid(s, &oid))
1209 die("%s is not a valid object", s);
1210 oid_array_append(oids, &oid);
1211 continue;
1212 }
1213 old_nr = oids->nr;
1214 for_each_glob_ref(add_oid, s, oids);
1215 if (old_nr == oids->nr)
1216 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1217 s);
1218 }
1219 smart_options->negotiation_tips = oids;
1220 }
1221
1222 static struct transport *prepare_transport(struct remote *remote, int deepen)
1223 {
1224 struct transport *transport;
1225
1226 transport = transport_get(remote, NULL);
1227 transport_set_verbosity(transport, verbosity, progress);
1228 transport->family = family;
1229 if (upload_pack)
1230 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1231 if (keep)
1232 set_option(transport, TRANS_OPT_KEEP, "yes");
1233 if (depth)
1234 set_option(transport, TRANS_OPT_DEPTH, depth);
1235 if (deepen && deepen_since)
1236 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1237 if (deepen && deepen_not.nr)
1238 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1239 (const char *)&deepen_not);
1240 if (deepen_relative)
1241 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1242 if (update_shallow)
1243 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1244 if (filter_options.choice) {
1245 struct strbuf expanded_filter_spec = STRBUF_INIT;
1246 expand_list_objects_filter_spec(&filter_options,
1247 &expanded_filter_spec);
1248 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1249 expanded_filter_spec.buf);
1250 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1251 strbuf_release(&expanded_filter_spec);
1252 }
1253 if (negotiation_tip.nr) {
1254 if (transport->smart_options)
1255 add_negotiation_tips(transport->smart_options);
1256 else
1257 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1258 }
1259 return transport;
1260 }
1261
1262 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1263 {
1264 int cannot_reuse;
1265
1266 /*
1267 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1268 * when remote helper is used (setting it to an empty string
1269 * is not unsetting). We could extend the remote helper
1270 * protocol for that, but for now, just force a new connection
1271 * without deepen-since. Similar story for deepen-not.
1272 */
1273 cannot_reuse = transport->cannot_reuse ||
1274 deepen_since || deepen_not.nr;
1275 if (cannot_reuse) {
1276 gsecondary = prepare_transport(transport->remote, 0);
1277 transport = gsecondary;
1278 }
1279
1280 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1281 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1282 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1283 if (!fetch_refs(transport, ref_map))
1284 consume_refs(transport, ref_map);
1285
1286 if (gsecondary) {
1287 transport_disconnect(gsecondary);
1288 gsecondary = NULL;
1289 }
1290 }
1291
1292 static int do_fetch(struct transport *transport,
1293 struct refspec *rs)
1294 {
1295 struct ref *ref_map;
1296 int autotags = (transport->remote->fetch_tags == 1);
1297 int retcode = 0;
1298 const struct ref *remote_refs;
1299 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1300 int must_list_refs = 1;
1301
1302 if (tags == TAGS_DEFAULT) {
1303 if (transport->remote->fetch_tags == 2)
1304 tags = TAGS_SET;
1305 if (transport->remote->fetch_tags == -1)
1306 tags = TAGS_UNSET;
1307 }
1308
1309 /* if not appending, truncate FETCH_HEAD */
1310 if (!append && !dry_run) {
1311 retcode = truncate_fetch_head();
1312 if (retcode)
1313 goto cleanup;
1314 }
1315
1316 if (rs->nr) {
1317 int i;
1318
1319 refspec_ref_prefixes(rs, &ref_prefixes);
1320
1321 /*
1322 * We can avoid listing refs if all of them are exact
1323 * OIDs
1324 */
1325 must_list_refs = 0;
1326 for (i = 0; i < rs->nr; i++) {
1327 if (!rs->items[i].exact_sha1) {
1328 must_list_refs = 1;
1329 break;
1330 }
1331 }
1332 } else if (transport->remote && transport->remote->fetch.nr)
1333 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1334
1335 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1336 must_list_refs = 1;
1337 if (ref_prefixes.argc)
1338 argv_array_push(&ref_prefixes, "refs/tags/");
1339 }
1340
1341 if (must_list_refs)
1342 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1343 else
1344 remote_refs = NULL;
1345
1346 argv_array_clear(&ref_prefixes);
1347
1348 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1349 tags, &autotags);
1350 if (!update_head_ok)
1351 check_not_current_branch(ref_map);
1352
1353 if (tags == TAGS_DEFAULT && autotags)
1354 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1355 if (prune) {
1356 /*
1357 * We only prune based on refspecs specified
1358 * explicitly (via command line or configuration); we
1359 * don't care whether --tags was specified.
1360 */
1361 if (rs->nr) {
1362 prune_refs(rs, ref_map, transport->url);
1363 } else {
1364 prune_refs(&transport->remote->fetch,
1365 ref_map,
1366 transport->url);
1367 }
1368 }
1369 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1370 free_refs(ref_map);
1371 retcode = 1;
1372 goto cleanup;
1373 }
1374
1375 if (set_upstream) {
1376 struct branch *branch = branch_get("HEAD");
1377 struct ref *rm;
1378 struct ref *source_ref = NULL;
1379
1380 /*
1381 * We're setting the upstream configuration for the
1382 * current branch. The relevent upstream is the
1383 * fetched branch that is meant to be merged with the
1384 * current one, i.e. the one fetched to FETCH_HEAD.
1385 *
1386 * When there are several such branches, consider the
1387 * request ambiguous and err on the safe side by doing
1388 * nothing and just emit a warning.
1389 */
1390 for (rm = ref_map; rm; rm = rm->next) {
1391 if (!rm->peer_ref) {
1392 if (source_ref) {
1393 warning(_("multiple branch detected, incompatible with --set-upstream"));
1394 goto skip;
1395 } else {
1396 source_ref = rm;
1397 }
1398 }
1399 }
1400 if (source_ref) {
1401 if (!strcmp(source_ref->name, "HEAD") ||
1402 starts_with(source_ref->name, "refs/heads/"))
1403 install_branch_config(0,
1404 branch->name,
1405 transport->remote->name,
1406 source_ref->name);
1407 else if (starts_with(source_ref->name, "refs/remotes/"))
1408 warning(_("not setting upstream for a remote remote-tracking branch"));
1409 else if (starts_with(source_ref->name, "refs/tags/"))
1410 warning(_("not setting upstream for a remote tag"));
1411 else
1412 warning(_("unknown branch type"));
1413 } else {
1414 warning(_("no source branch found.\n"
1415 "you need to specify exactly one branch with the --set-upstream option."));
1416 }
1417 }
1418 skip:
1419 free_refs(ref_map);
1420
1421 /* if neither --no-tags nor --tags was specified, do automated tag
1422 * following ... */
1423 if (tags == TAGS_DEFAULT && autotags) {
1424 struct ref **tail = &ref_map;
1425 ref_map = NULL;
1426 find_non_local_tags(remote_refs, &ref_map, &tail);
1427 if (ref_map)
1428 backfill_tags(transport, ref_map);
1429 free_refs(ref_map);
1430 }
1431
1432 cleanup:
1433 return retcode;
1434 }
1435
1436 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1437 {
1438 struct string_list *list = priv;
1439 if (!remote->skip_default_update)
1440 string_list_append(list, remote->name);
1441 return 0;
1442 }
1443
1444 struct remote_group_data {
1445 const char *name;
1446 struct string_list *list;
1447 };
1448
1449 static int get_remote_group(const char *key, const char *value, void *priv)
1450 {
1451 struct remote_group_data *g = priv;
1452
1453 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1454 /* split list by white space */
1455 while (*value) {
1456 size_t wordlen = strcspn(value, " \t\n");
1457
1458 if (wordlen >= 1)
1459 string_list_append_nodup(g->list,
1460 xstrndup(value, wordlen));
1461 value += wordlen + (value[wordlen] != '\0');
1462 }
1463 }
1464
1465 return 0;
1466 }
1467
1468 static int add_remote_or_group(const char *name, struct string_list *list)
1469 {
1470 int prev_nr = list->nr;
1471 struct remote_group_data g;
1472 g.name = name; g.list = list;
1473
1474 git_config(get_remote_group, &g);
1475 if (list->nr == prev_nr) {
1476 struct remote *remote = remote_get(name);
1477 if (!remote_is_configured(remote, 0))
1478 return 0;
1479 string_list_append(list, remote->name);
1480 }
1481 return 1;
1482 }
1483
1484 static void add_options_to_argv(struct argv_array *argv)
1485 {
1486 if (dry_run)
1487 argv_array_push(argv, "--dry-run");
1488 if (prune != -1)
1489 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1490 if (prune_tags != -1)
1491 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1492 if (update_head_ok)
1493 argv_array_push(argv, "--update-head-ok");
1494 if (force)
1495 argv_array_push(argv, "--force");
1496 if (keep)
1497 argv_array_push(argv, "--keep");
1498 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1499 argv_array_push(argv, "--recurse-submodules");
1500 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1501 argv_array_push(argv, "--recurse-submodules=on-demand");
1502 if (tags == TAGS_SET)
1503 argv_array_push(argv, "--tags");
1504 else if (tags == TAGS_UNSET)
1505 argv_array_push(argv, "--no-tags");
1506 if (verbosity >= 2)
1507 argv_array_push(argv, "-v");
1508 if (verbosity >= 1)
1509 argv_array_push(argv, "-v");
1510 else if (verbosity < 0)
1511 argv_array_push(argv, "-q");
1512
1513 }
1514
1515 static int fetch_multiple(struct string_list *list)
1516 {
1517 int i, result = 0;
1518 struct argv_array argv = ARGV_ARRAY_INIT;
1519
1520 if (!append && !dry_run) {
1521 int errcode = truncate_fetch_head();
1522 if (errcode)
1523 return errcode;
1524 }
1525
1526 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
1527 add_options_to_argv(&argv);
1528
1529 for (i = 0; i < list->nr; i++) {
1530 const char *name = list->items[i].string;
1531 argv_array_push(&argv, name);
1532 if (verbosity >= 0)
1533 printf(_("Fetching %s\n"), name);
1534 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1535 error(_("Could not fetch %s"), name);
1536 result = 1;
1537 }
1538 argv_array_pop(&argv);
1539 }
1540
1541 argv_array_clear(&argv);
1542 return result;
1543 }
1544
1545 /*
1546 * Fetching from the promisor remote should use the given filter-spec
1547 * or inherit the default filter-spec from the config.
1548 */
1549 static inline void fetch_one_setup_partial(struct remote *remote)
1550 {
1551 /*
1552 * Explicit --no-filter argument overrides everything, regardless
1553 * of any prior partial clones and fetches.
1554 */
1555 if (filter_options.no_filter)
1556 return;
1557
1558 /*
1559 * If no prior partial clone/fetch and the current fetch DID NOT
1560 * request a partial-fetch, do a normal fetch.
1561 */
1562 if (!repository_format_partial_clone && !filter_options.choice)
1563 return;
1564
1565 /*
1566 * If this is the FIRST partial-fetch request, we enable partial
1567 * on this repo and remember the given filter-spec as the default
1568 * for subsequent fetches to this remote.
1569 */
1570 if (!repository_format_partial_clone && filter_options.choice) {
1571 partial_clone_register(remote->name, &filter_options);
1572 return;
1573 }
1574
1575 /*
1576 * We are currently limited to only ONE promisor remote and only
1577 * allow partial-fetches from the promisor remote.
1578 */
1579 if (strcmp(remote->name, repository_format_partial_clone)) {
1580 if (filter_options.choice)
1581 die(_("--filter can only be used with the remote "
1582 "configured in extensions.partialClone"));
1583 return;
1584 }
1585
1586 /*
1587 * Do a partial-fetch from the promisor remote using either the
1588 * explicitly given filter-spec or inherit the filter-spec from
1589 * the config.
1590 */
1591 if (!filter_options.choice)
1592 partial_clone_get_default_filter_spec(&filter_options);
1593 return;
1594 }
1595
1596 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1597 {
1598 struct refspec rs = REFSPEC_INIT_FETCH;
1599 int i;
1600 int exit_code;
1601 int maybe_prune_tags;
1602 int remote_via_config = remote_is_configured(remote, 0);
1603
1604 if (!remote)
1605 die(_("No remote repository specified. Please, specify either a URL or a\n"
1606 "remote name from which new revisions should be fetched."));
1607
1608 gtransport = prepare_transport(remote, 1);
1609
1610 if (prune < 0) {
1611 /* no command line request */
1612 if (0 <= remote->prune)
1613 prune = remote->prune;
1614 else if (0 <= fetch_prune_config)
1615 prune = fetch_prune_config;
1616 else
1617 prune = PRUNE_BY_DEFAULT;
1618 }
1619
1620 if (prune_tags < 0) {
1621 /* no command line request */
1622 if (0 <= remote->prune_tags)
1623 prune_tags = remote->prune_tags;
1624 else if (0 <= fetch_prune_tags_config)
1625 prune_tags = fetch_prune_tags_config;
1626 else
1627 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1628 }
1629
1630 maybe_prune_tags = prune_tags_ok && prune_tags;
1631 if (maybe_prune_tags && remote_via_config)
1632 refspec_append(&remote->fetch, TAG_REFSPEC);
1633
1634 if (maybe_prune_tags && (argc || !remote_via_config))
1635 refspec_append(&rs, TAG_REFSPEC);
1636
1637 for (i = 0; i < argc; i++) {
1638 if (!strcmp(argv[i], "tag")) {
1639 char *tag;
1640 i++;
1641 if (i >= argc)
1642 die(_("You need to specify a tag name."));
1643
1644 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1645 argv[i], argv[i]);
1646 refspec_append(&rs, tag);
1647 free(tag);
1648 } else {
1649 refspec_append(&rs, argv[i]);
1650 }
1651 }
1652
1653 if (server_options.nr)
1654 gtransport->server_options = &server_options;
1655
1656 sigchain_push_common(unlock_pack_on_signal);
1657 atexit(unlock_pack);
1658 sigchain_push(SIGPIPE, SIG_IGN);
1659 exit_code = do_fetch(gtransport, &rs);
1660 sigchain_pop(SIGPIPE);
1661 refspec_clear(&rs);
1662 transport_disconnect(gtransport);
1663 gtransport = NULL;
1664 return exit_code;
1665 }
1666
1667 int cmd_fetch(int argc, const char **argv, const char *prefix)
1668 {
1669 int i;
1670 struct string_list list = STRING_LIST_INIT_DUP;
1671 struct remote *remote = NULL;
1672 int result = 0;
1673 int prune_tags_ok = 1;
1674 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1675
1676 packet_trace_identity("fetch");
1677
1678 fetch_if_missing = 0;
1679
1680 /* Record the command line for the reflog */
1681 strbuf_addstr(&default_rla, "fetch");
1682 for (i = 1; i < argc; i++)
1683 strbuf_addf(&default_rla, " %s", argv[i]);
1684
1685 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1686 git_config(git_fetch_config, NULL);
1687
1688 argc = parse_options(argc, argv, prefix,
1689 builtin_fetch_options, builtin_fetch_usage, 0);
1690
1691 if (deepen_relative) {
1692 if (deepen_relative < 0)
1693 die(_("Negative depth in --deepen is not supported"));
1694 if (depth)
1695 die(_("--deepen and --depth are mutually exclusive"));
1696 depth = xstrfmt("%d", deepen_relative);
1697 }
1698 if (unshallow) {
1699 if (depth)
1700 die(_("--depth and --unshallow cannot be used together"));
1701 else if (!is_repository_shallow(the_repository))
1702 die(_("--unshallow on a complete repository does not make sense"));
1703 else
1704 depth = xstrfmt("%d", INFINITE_DEPTH);
1705 }
1706
1707 /* no need to be strict, transport_set_option() will validate it again */
1708 if (depth && atoi(depth) < 1)
1709 die(_("depth %s is not a positive number"), depth);
1710 if (depth || deepen_since || deepen_not.nr)
1711 deepen = 1;
1712
1713 if (filter_options.choice && !repository_format_partial_clone)
1714 die("--filter can only be used when extensions.partialClone is set");
1715
1716 if (all) {
1717 if (argc == 1)
1718 die(_("fetch --all does not take a repository argument"));
1719 else if (argc > 1)
1720 die(_("fetch --all does not make sense with refspecs"));
1721 (void) for_each_remote(get_one_remote_for_fetch, &list);
1722 } else if (argc == 0) {
1723 /* No arguments -- use default remote */
1724 remote = remote_get(NULL);
1725 } else if (multiple) {
1726 /* All arguments are assumed to be remotes or groups */
1727 for (i = 0; i < argc; i++)
1728 if (!add_remote_or_group(argv[i], &list))
1729 die(_("No such remote or remote group: %s"), argv[i]);
1730 } else {
1731 /* Single remote or group */
1732 (void) add_remote_or_group(argv[0], &list);
1733 if (list.nr > 1) {
1734 /* More than one remote */
1735 if (argc > 1)
1736 die(_("Fetching a group and specifying refspecs does not make sense"));
1737 } else {
1738 /* Zero or one remotes */
1739 remote = remote_get(argv[0]);
1740 prune_tags_ok = (argc == 1);
1741 argc--;
1742 argv++;
1743 }
1744 }
1745
1746 if (remote) {
1747 if (filter_options.choice || repository_format_partial_clone)
1748 fetch_one_setup_partial(remote);
1749 result = fetch_one(remote, argc, argv, prune_tags_ok);
1750 } else {
1751 if (filter_options.choice)
1752 die(_("--filter can only be used with the remote "
1753 "configured in extensions.partialclone"));
1754 /* TODO should this also die if we have a previous partial-clone? */
1755 result = fetch_multiple(&list);
1756 }
1757
1758 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1759 struct argv_array options = ARGV_ARRAY_INIT;
1760
1761 add_options_to_argv(&options);
1762 result = fetch_populated_submodules(the_repository,
1763 &options,
1764 submodule_prefix,
1765 recurse_submodules,
1766 recurse_submodules_default,
1767 verbosity < 0,
1768 max_children);
1769 argv_array_clear(&options);
1770 }
1771
1772 string_list_clear(&list, 0);
1773
1774 close_object_store(the_repository->objects);
1775
1776 if (enable_auto_gc) {
1777 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1778 if (verbosity < 0)
1779 argv_array_push(&argv_gc_auto, "--quiet");
1780 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1781 argv_array_clear(&argv_gc_auto);
1782 }
1783
1784 return result;
1785 }
Unnamed repository; edit this file 'description' to name the repository.