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
27static const char * const builtin_fetch_usage[] = {
28 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
29 N_("git fetch [<options>] <group>"),
30 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
31 N_("git fetch --all [<options>]"),
32 NULL
33};
34
35enum {
36 TAGS_UNSET = 0,
37 TAGS_DEFAULT = 1,
38 TAGS_SET = 2
39};
40
41static int fetch_prune_config = -1; /* unspecified */
42static int prune = -1; /* unspecified */
43#define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
44
45static int fetch_prune_tags_config = -1; /* unspecified */
46static int prune_tags = -1; /* unspecified */
47#define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
48
49static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
50static int progress = -1;
51static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
52static int max_children = 1;
53static enum transport_family family;
54static const char *depth;
55static const char *deepen_since;
56static const char *upload_pack;
57static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
58static struct strbuf default_rla = STRBUF_INIT;
59static struct transport *gtransport;
60static struct transport *gsecondary;
61static const char *submodule_prefix = "";
62static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
63static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
64static int shown_url = 0;
65static struct refspec refmap = REFSPEC_INIT_FETCH;
66static struct list_objects_filter_options filter_options;
67static struct string_list server_options = STRING_LIST_INIT_DUP;
68static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
69
70static int git_fetch_config(const char *k, const char *v, void *cb)
71{
72 if (!strcmp(k, "fetch.prune")) {
73 fetch_prune_config = git_config_bool(k, v);
74 return 0;
75 }
76
77 if (!strcmp(k, "fetch.prunetags")) {
78 fetch_prune_tags_config = git_config_bool(k, v);
79 return 0;
80 }
81
82 if (!strcmp(k, "submodule.recurse")) {
83 int r = git_config_bool(k, v) ?
84 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
85 recurse_submodules = r;
86 }
87
88 if (!strcmp(k, "submodule.fetchjobs")) {
89 max_children = parse_submodule_fetchjobs(k, v);
90 return 0;
91 } else if (!strcmp(k, "fetch.recursesubmodules")) {
92 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
93 return 0;
94 }
95
96 return git_default_config(k, v, cb);
97}
98
99static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
100{
101 /*
102 * "git fetch --refmap='' origin foo"
103 * can be used to tell the command not to store anywhere
104 */
105 refspec_append(&refmap, arg);
106
107 return 0;
108}
109
110static struct option builtin_fetch_options[] = {
111 OPT__VERBOSITY(&verbosity),
112 OPT_BOOL(0, "all", &all,
113 N_("fetch from all remotes")),
114 OPT_BOOL('a', "append", &append,
115 N_("append to .git/FETCH_HEAD instead of overwriting")),
116 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
117 N_("path to upload pack on remote end")),
118 OPT__FORCE(&force, N_("force overwrite of local branch"), 0),
119 OPT_BOOL('m', "multiple", &multiple,
120 N_("fetch from multiple remotes")),
121 OPT_SET_INT('t', "tags", &tags,
122 N_("fetch all tags and associated objects"), TAGS_SET),
123 OPT_SET_INT('n', NULL, &tags,
124 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
125 OPT_INTEGER('j', "jobs", &max_children,
126 N_("number of submodules fetched in parallel")),
127 OPT_BOOL('p', "prune", &prune,
128 N_("prune remote-tracking branches no longer on remote")),
129 OPT_BOOL('P', "prune-tags", &prune_tags,
130 N_("prune local tags no longer on remote and clobber changed tags")),
131 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
132 N_("control recursive fetching of submodules"),
133 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
134 OPT_BOOL(0, "dry-run", &dry_run,
135 N_("dry run")),
136 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
137 OPT_BOOL('u', "update-head-ok", &update_head_ok,
138 N_("allow updating of HEAD ref")),
139 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
140 OPT_STRING(0, "depth", &depth, N_("depth"),
141 N_("deepen history of shallow clone")),
142 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
143 N_("deepen history of shallow repository based on time")),
144 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
145 N_("deepen history of shallow clone, excluding rev")),
146 OPT_INTEGER(0, "deepen", &deepen_relative,
147 N_("deepen history of shallow clone")),
148 OPT_SET_INT_F(0, "unshallow", &unshallow,
149 N_("convert to a complete repository"),
150 1, PARSE_OPT_NONEG),
151 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
152 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
153 { OPTION_CALLBACK, 0, "recurse-submodules-default",
154 &recurse_submodules_default, N_("on-demand"),
155 N_("default for recursive fetching of submodules "
156 "(lower priority than config files)"),
157 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
158 OPT_BOOL(0, "update-shallow", &update_shallow,
159 N_("accept refs that update .git/shallow")),
160 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
161 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
162 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
163 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
164 TRANSPORT_FAMILY_IPV4),
165 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
166 TRANSPORT_FAMILY_IPV6),
167 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
168 N_("report that we have only objects reachable from this object")),
169 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
170 OPT_END()
171};
172
173static void unlock_pack(void)
174{
175 if (gtransport)
176 transport_unlock_pack(gtransport);
177 if (gsecondary)
178 transport_unlock_pack(gsecondary);
179}
180
181static void unlock_pack_on_signal(int signo)
182{
183 unlock_pack();
184 sigchain_pop(signo);
185 raise(signo);
186}
187
188static void add_merge_config(struct ref **head,
189 const struct ref *remote_refs,
190 struct branch *branch,
191 struct ref ***tail)
192{
193 int i;
194
195 for (i = 0; i < branch->merge_nr; i++) {
196 struct ref *rm, **old_tail = *tail;
197 struct refspec_item refspec;
198
199 for (rm = *head; rm; rm = rm->next) {
200 if (branch_merge_matches(branch, i, rm->name)) {
201 rm->fetch_head_status = FETCH_HEAD_MERGE;
202 break;
203 }
204 }
205 if (rm)
206 continue;
207
208 /*
209 * Not fetched to a remote-tracking branch? We need to fetch
210 * it anyway to allow this branch's "branch.$name.merge"
211 * to be honored by 'git pull', but we do not have to
212 * fail if branch.$name.merge is misconfigured to point
213 * at a nonexisting branch. If we were indeed called by
214 * 'git pull', it will notice the misconfiguration because
215 * there is no entry in the resulting FETCH_HEAD marked
216 * for merging.
217 */
218 memset(&refspec, 0, sizeof(refspec));
219 refspec.src = branch->merge[i]->src;
220 get_fetch_map(remote_refs, &refspec, tail, 1);
221 for (rm = *old_tail; rm; rm = rm->next)
222 rm->fetch_head_status = FETCH_HEAD_MERGE;
223 }
224}
225
226static int add_existing(const char *refname, const struct object_id *oid,
227 int flag, void *cbdata)
228{
229 struct string_list *list = (struct string_list *)cbdata;
230 struct string_list_item *item = string_list_insert(list, refname);
231 struct object_id *old_oid = xmalloc(sizeof(*old_oid));
232
233 oidcpy(old_oid, oid);
234 item->util = old_oid;
235 return 0;
236}
237
238static int will_fetch(struct ref **head, const unsigned char *sha1)
239{
240 struct ref *rm = *head;
241 while (rm) {
242 if (hasheq(rm->old_oid.hash, sha1))
243 return 1;
244 rm = rm->next;
245 }
246 return 0;
247}
248
249static void find_non_local_tags(const struct ref *refs,
250 struct ref **head,
251 struct ref ***tail)
252{
253 struct string_list existing_refs = STRING_LIST_INIT_DUP;
254 struct string_list remote_refs = STRING_LIST_INIT_NODUP;
255 const struct ref *ref;
256 struct string_list_item *item = NULL;
257
258 for_each_ref(add_existing, &existing_refs);
259 for (ref = refs; ref; ref = ref->next) {
260 if (!starts_with(ref->name, "refs/tags/"))
261 continue;
262
263 /*
264 * The peeled ref always follows the matching base
265 * ref, so if we see a peeled ref that we don't want
266 * to fetch then we can mark the ref entry in the list
267 * as one to ignore by setting util to NULL.
268 */
269 if (ends_with(ref->name, "^{}")) {
270 if (item &&
271 !has_object_file_with_flags(&ref->old_oid,
272 OBJECT_INFO_QUICK) &&
273 !will_fetch(head, ref->old_oid.hash) &&
274 !has_sha1_file_with_flags(item->util,
275 OBJECT_INFO_QUICK) &&
276 !will_fetch(head, item->util))
277 item->util = NULL;
278 item = NULL;
279 continue;
280 }
281
282 /*
283 * If item is non-NULL here, then we previously saw a
284 * ref not followed by a peeled reference, so we need
285 * to check if it is a lightweight tag that we want to
286 * fetch.
287 */
288 if (item &&
289 !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
290 !will_fetch(head, item->util))
291 item->util = NULL;
292
293 item = NULL;
294
295 /* skip duplicates and refs that we already have */
296 if (string_list_has_string(&remote_refs, ref->name) ||
297 string_list_has_string(&existing_refs, ref->name))
298 continue;
299
300 item = string_list_insert(&remote_refs, ref->name);
301 item->util = (void *)&ref->old_oid;
302 }
303 string_list_clear(&existing_refs, 1);
304
305 /*
306 * We may have a final lightweight tag that needs to be
307 * checked to see if it needs fetching.
308 */
309 if (item &&
310 !has_sha1_file_with_flags(item->util, OBJECT_INFO_QUICK) &&
311 !will_fetch(head, item->util))
312 item->util = NULL;
313
314 /*
315 * For all the tags in the remote_refs string list,
316 * add them to the list of refs to be fetched
317 */
318 for_each_string_list_item(item, &remote_refs) {
319 /* Unless we have already decided to ignore this item... */
320 if (item->util)
321 {
322 struct ref *rm = alloc_ref(item->string);
323 rm->peer_ref = alloc_ref(item->string);
324 oidcpy(&rm->old_oid, item->util);
325 **tail = rm;
326 *tail = &rm->next;
327 }
328 }
329
330 string_list_clear(&remote_refs, 0);
331}
332
333static struct ref *get_ref_map(struct remote *remote,
334 const struct ref *remote_refs,
335 struct refspec *rs,
336 int tags, int *autotags)
337{
338 int i;
339 struct ref *rm;
340 struct ref *ref_map = NULL;
341 struct ref **tail = &ref_map;
342
343 /* opportunistically-updated references: */
344 struct ref *orefs = NULL, **oref_tail = &orefs;
345
346 struct string_list existing_refs = STRING_LIST_INIT_DUP;
347
348 if (rs->nr) {
349 struct refspec *fetch_refspec;
350
351 for (i = 0; i < rs->nr; i++) {
352 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
353 if (rs->items[i].dst && rs->items[i].dst[0])
354 *autotags = 1;
355 }
356 /* Merge everything on the command line (but not --tags) */
357 for (rm = ref_map; rm; rm = rm->next)
358 rm->fetch_head_status = FETCH_HEAD_MERGE;
359
360 /*
361 * For any refs that we happen to be fetching via
362 * command-line arguments, the destination ref might
363 * have been missing or have been different than the
364 * remote-tracking ref that would be derived from the
365 * configured refspec. In these cases, we want to
366 * take the opportunity to update their configured
367 * remote-tracking reference. However, we do not want
368 * to mention these entries in FETCH_HEAD at all, as
369 * they would simply be duplicates of existing
370 * entries, so we set them FETCH_HEAD_IGNORE below.
371 *
372 * We compute these entries now, based only on the
373 * refspecs specified on the command line. But we add
374 * them to the list following the refspecs resulting
375 * from the tags option so that one of the latter,
376 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
377 * by ref_remove_duplicates() in favor of one of these
378 * opportunistic entries with FETCH_HEAD_IGNORE.
379 */
380 if (refmap.nr)
381 fetch_refspec = &refmap;
382 else
383 fetch_refspec = &remote->fetch;
384
385 for (i = 0; i < fetch_refspec->nr; i++)
386 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
387 } else if (refmap.nr) {
388 die("--refmap option is only meaningful with command-line refspec(s).");
389 } else {
390 /* Use the defaults */
391 struct branch *branch = branch_get(NULL);
392 int has_merge = branch_has_merge_config(branch);
393 if (remote &&
394 (remote->fetch.nr ||
395 /* Note: has_merge implies non-NULL branch->remote_name */
396 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
397 for (i = 0; i < remote->fetch.nr; i++) {
398 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
399 if (remote->fetch.items[i].dst &&
400 remote->fetch.items[i].dst[0])
401 *autotags = 1;
402 if (!i && !has_merge && ref_map &&
403 !remote->fetch.items[0].pattern)
404 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
405 }
406 /*
407 * if the remote we're fetching from is the same
408 * as given in branch.<name>.remote, we add the
409 * ref given in branch.<name>.merge, too.
410 *
411 * Note: has_merge implies non-NULL branch->remote_name
412 */
413 if (has_merge &&
414 !strcmp(branch->remote_name, remote->name))
415 add_merge_config(&ref_map, remote_refs, branch, &tail);
416 } else {
417 ref_map = get_remote_ref(remote_refs, "HEAD");
418 if (!ref_map)
419 die(_("Couldn't find remote ref HEAD"));
420 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
421 tail = &ref_map->next;
422 }
423 }
424
425 if (tags == TAGS_SET)
426 /* also fetch all tags */
427 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
428 else if (tags == TAGS_DEFAULT && *autotags)
429 find_non_local_tags(remote_refs, &ref_map, &tail);
430
431 /* Now append any refs to be updated opportunistically: */
432 *tail = orefs;
433 for (rm = orefs; rm; rm = rm->next) {
434 rm->fetch_head_status = FETCH_HEAD_IGNORE;
435 tail = &rm->next;
436 }
437
438 ref_map = ref_remove_duplicates(ref_map);
439
440 for_each_ref(add_existing, &existing_refs);
441 for (rm = ref_map; rm; rm = rm->next) {
442 if (rm->peer_ref) {
443 struct string_list_item *peer_item =
444 string_list_lookup(&existing_refs,
445 rm->peer_ref->name);
446 if (peer_item) {
447 struct object_id *old_oid = peer_item->util;
448 oidcpy(&rm->peer_ref->old_oid, old_oid);
449 }
450 }
451 }
452 string_list_clear(&existing_refs, 1);
453
454 return ref_map;
455}
456
457#define STORE_REF_ERROR_OTHER 1
458#define STORE_REF_ERROR_DF_CONFLICT 2
459
460static int s_update_ref(const char *action,
461 struct ref *ref,
462 int check_old)
463{
464 char *msg;
465 char *rla = getenv("GIT_REFLOG_ACTION");
466 struct ref_transaction *transaction;
467 struct strbuf err = STRBUF_INIT;
468 int ret, df_conflict = 0;
469
470 if (dry_run)
471 return 0;
472 if (!rla)
473 rla = default_rla.buf;
474 msg = xstrfmt("%s: %s", rla, action);
475
476 transaction = ref_transaction_begin(&err);
477 if (!transaction ||
478 ref_transaction_update(transaction, ref->name,
479 &ref->new_oid,
480 check_old ? &ref->old_oid : NULL,
481 0, msg, &err))
482 goto fail;
483
484 ret = ref_transaction_commit(transaction, &err);
485 if (ret) {
486 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
487 goto fail;
488 }
489
490 ref_transaction_free(transaction);
491 strbuf_release(&err);
492 free(msg);
493 return 0;
494fail:
495 ref_transaction_free(transaction);
496 error("%s", err.buf);
497 strbuf_release(&err);
498 free(msg);
499 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
500 : STORE_REF_ERROR_OTHER;
501}
502
503static int refcol_width = 10;
504static int compact_format;
505
506static void adjust_refcol_width(const struct ref *ref)
507{
508 int max, rlen, llen, len;
509
510 /* uptodate lines are only shown on high verbosity level */
511 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
512 return;
513
514 max = term_columns();
515 rlen = utf8_strwidth(prettify_refname(ref->name));
516
517 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
518
519 /*
520 * rough estimation to see if the output line is too long and
521 * should not be counted (we can't do precise calculation
522 * anyway because we don't know if the error explanation part
523 * will be printed in update_local_ref)
524 */
525 if (compact_format) {
526 llen = 0;
527 max = max * 2 / 3;
528 }
529 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
530 if (len >= max)
531 return;
532
533 /*
534 * Not precise calculation for compact mode because '*' can
535 * appear on the left hand side of '->' and shrink the column
536 * back.
537 */
538 if (refcol_width < rlen)
539 refcol_width = rlen;
540}
541
542static void prepare_format_display(struct ref *ref_map)
543{
544 struct ref *rm;
545 const char *format = "full";
546
547 git_config_get_string_const("fetch.output", &format);
548 if (!strcasecmp(format, "full"))
549 compact_format = 0;
550 else if (!strcasecmp(format, "compact"))
551 compact_format = 1;
552 else
553 die(_("configuration fetch.output contains invalid value %s"),
554 format);
555
556 for (rm = ref_map; rm; rm = rm->next) {
557 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
558 !rm->peer_ref ||
559 !strcmp(rm->name, "HEAD"))
560 continue;
561
562 adjust_refcol_width(rm);
563 }
564}
565
566static void print_remote_to_local(struct strbuf *display,
567 const char *remote, const char *local)
568{
569 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
570}
571
572static int find_and_replace(struct strbuf *haystack,
573 const char *needle,
574 const char *placeholder)
575{
576 const char *p = strstr(haystack->buf, needle);
577 int plen, nlen;
578
579 if (!p)
580 return 0;
581
582 if (p > haystack->buf && p[-1] != '/')
583 return 0;
584
585 plen = strlen(p);
586 nlen = strlen(needle);
587 if (plen > nlen && p[nlen] != '/')
588 return 0;
589
590 strbuf_splice(haystack, p - haystack->buf, nlen,
591 placeholder, strlen(placeholder));
592 return 1;
593}
594
595static void print_compact(struct strbuf *display,
596 const char *remote, const char *local)
597{
598 struct strbuf r = STRBUF_INIT;
599 struct strbuf l = STRBUF_INIT;
600
601 if (!strcmp(remote, local)) {
602 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
603 return;
604 }
605
606 strbuf_addstr(&r, remote);
607 strbuf_addstr(&l, local);
608
609 if (!find_and_replace(&r, local, "*"))
610 find_and_replace(&l, remote, "*");
611 print_remote_to_local(display, r.buf, l.buf);
612
613 strbuf_release(&r);
614 strbuf_release(&l);
615}
616
617static void format_display(struct strbuf *display, char code,
618 const char *summary, const char *error,
619 const char *remote, const char *local,
620 int summary_width)
621{
622 int width = (summary_width + strlen(summary) - gettext_width(summary));
623
624 strbuf_addf(display, "%c %-*s ", code, width, summary);
625 if (!compact_format)
626 print_remote_to_local(display, remote, local);
627 else
628 print_compact(display, remote, local);
629 if (error)
630 strbuf_addf(display, " (%s)", error);
631}
632
633static int update_local_ref(struct ref *ref,
634 const char *remote,
635 const struct ref *remote_ref,
636 struct strbuf *display,
637 int summary_width)
638{
639 struct commit *current = NULL, *updated;
640 enum object_type type;
641 struct branch *current_branch = branch_get(NULL);
642 const char *pretty_ref = prettify_refname(ref->name);
643
644 type = oid_object_info(the_repository, &ref->new_oid, NULL);
645 if (type < 0)
646 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
647
648 if (oideq(&ref->old_oid, &ref->new_oid)) {
649 if (verbosity > 0)
650 format_display(display, '=', _("[up to date]"), NULL,
651 remote, pretty_ref, summary_width);
652 return 0;
653 }
654
655 if (current_branch &&
656 !strcmp(ref->name, current_branch->name) &&
657 !(update_head_ok || is_bare_repository()) &&
658 !is_null_oid(&ref->old_oid)) {
659 /*
660 * If this is the head, and it's not okay to update
661 * the head, and the old value of the head isn't empty...
662 */
663 format_display(display, '!', _("[rejected]"),
664 _("can't fetch in current branch"),
665 remote, pretty_ref, summary_width);
666 return 1;
667 }
668
669 if (!is_null_oid(&ref->old_oid) &&
670 starts_with(ref->name, "refs/tags/")) {
671 int r;
672 r = s_update_ref("updating tag", ref, 0);
673 format_display(display, r ? '!' : 't', _("[tag update]"),
674 r ? _("unable to update local ref") : NULL,
675 remote, pretty_ref, summary_width);
676 return r;
677 }
678
679 current = lookup_commit_reference_gently(the_repository,
680 &ref->old_oid, 1);
681 updated = lookup_commit_reference_gently(the_repository,
682 &ref->new_oid, 1);
683 if (!current || !updated) {
684 const char *msg;
685 const char *what;
686 int r;
687 /*
688 * Nicely describe the new ref we're fetching.
689 * Base this on the remote's ref name, as it's
690 * more likely to follow a standard layout.
691 */
692 const char *name = remote_ref ? remote_ref->name : "";
693 if (starts_with(name, "refs/tags/")) {
694 msg = "storing tag";
695 what = _("[new tag]");
696 } else if (starts_with(name, "refs/heads/")) {
697 msg = "storing head";
698 what = _("[new branch]");
699 } else {
700 msg = "storing ref";
701 what = _("[new ref]");
702 }
703
704 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
705 (recurse_submodules != RECURSE_SUBMODULES_ON))
706 check_for_new_submodule_commits(&ref->new_oid);
707 r = s_update_ref(msg, ref, 0);
708 format_display(display, r ? '!' : '*', what,
709 r ? _("unable to update local ref") : NULL,
710 remote, pretty_ref, summary_width);
711 return r;
712 }
713
714 if (in_merge_bases(current, updated)) {
715 struct strbuf quickref = STRBUF_INIT;
716 int r;
717 strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
718 strbuf_addstr(&quickref, "..");
719 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
720 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
721 (recurse_submodules != RECURSE_SUBMODULES_ON))
722 check_for_new_submodule_commits(&ref->new_oid);
723 r = s_update_ref("fast-forward", ref, 1);
724 format_display(display, r ? '!' : ' ', quickref.buf,
725 r ? _("unable to update local ref") : NULL,
726 remote, pretty_ref, summary_width);
727 strbuf_release(&quickref);
728 return r;
729 } else if (force || ref->force) {
730 struct strbuf quickref = STRBUF_INIT;
731 int r;
732 strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV);
733 strbuf_addstr(&quickref, "...");
734 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
735 if ((recurse_submodules != RECURSE_SUBMODULES_OFF) &&
736 (recurse_submodules != RECURSE_SUBMODULES_ON))
737 check_for_new_submodule_commits(&ref->new_oid);
738 r = s_update_ref("forced-update", ref, 1);
739 format_display(display, r ? '!' : '+', quickref.buf,
740 r ? _("unable to update local ref") : _("forced update"),
741 remote, pretty_ref, summary_width);
742 strbuf_release(&quickref);
743 return r;
744 } else {
745 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
746 remote, pretty_ref, summary_width);
747 return 1;
748 }
749}
750
751static int iterate_ref_map(void *cb_data, struct object_id *oid)
752{
753 struct ref **rm = cb_data;
754 struct ref *ref = *rm;
755
756 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
757 ref = ref->next;
758 if (!ref)
759 return -1; /* end of the list */
760 *rm = ref->next;
761 oidcpy(oid, &ref->old_oid);
762 return 0;
763}
764
765static int store_updated_refs(const char *raw_url, const char *remote_name,
766 int connectivity_checked, struct ref *ref_map)
767{
768 FILE *fp;
769 struct commit *commit;
770 int url_len, i, rc = 0;
771 struct strbuf note = STRBUF_INIT;
772 const char *what, *kind;
773 struct ref *rm;
774 char *url;
775 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
776 int want_status;
777 int summary_width = transport_summary_width(ref_map);
778
779 fp = fopen(filename, "a");
780 if (!fp)
781 return error_errno(_("cannot open %s"), filename);
782
783 if (raw_url)
784 url = transport_anonymize_url(raw_url);
785 else
786 url = xstrdup("foreign");
787
788 if (!connectivity_checked) {
789 rm = ref_map;
790 if (check_connected(iterate_ref_map, &rm, NULL)) {
791 rc = error(_("%s did not send all necessary objects\n"), url);
792 goto abort;
793 }
794 }
795
796 prepare_format_display(ref_map);
797
798 /*
799 * We do a pass for each fetch_head_status type in their enum order, so
800 * merged entries are written before not-for-merge. That lets readers
801 * use FETCH_HEAD as a refname to refer to the ref to be merged.
802 */
803 for (want_status = FETCH_HEAD_MERGE;
804 want_status <= FETCH_HEAD_IGNORE;
805 want_status++) {
806 for (rm = ref_map; rm; rm = rm->next) {
807 struct ref *ref = NULL;
808 const char *merge_status_marker = "";
809
810 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
811 if (want_status == FETCH_HEAD_MERGE)
812 warning(_("reject %s because shallow roots are not allowed to be updated"),
813 rm->peer_ref ? rm->peer_ref->name : rm->name);
814 continue;
815 }
816
817 commit = lookup_commit_reference_gently(the_repository,
818 &rm->old_oid,
819 1);
820 if (!commit)
821 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
822
823 if (rm->fetch_head_status != want_status)
824 continue;
825
826 if (rm->peer_ref) {
827 ref = alloc_ref(rm->peer_ref->name);
828 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
829 oidcpy(&ref->new_oid, &rm->old_oid);
830 ref->force = rm->peer_ref->force;
831 }
832
833
834 if (!strcmp(rm->name, "HEAD")) {
835 kind = "";
836 what = "";
837 }
838 else if (starts_with(rm->name, "refs/heads/")) {
839 kind = "branch";
840 what = rm->name + 11;
841 }
842 else if (starts_with(rm->name, "refs/tags/")) {
843 kind = "tag";
844 what = rm->name + 10;
845 }
846 else if (starts_with(rm->name, "refs/remotes/")) {
847 kind = "remote-tracking branch";
848 what = rm->name + 13;
849 }
850 else {
851 kind = "";
852 what = rm->name;
853 }
854
855 url_len = strlen(url);
856 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
857 ;
858 url_len = i + 1;
859 if (4 < i && !strncmp(".git", url + i - 3, 4))
860 url_len = i - 3;
861
862 strbuf_reset(¬e);
863 if (*what) {
864 if (*kind)
865 strbuf_addf(¬e, "%s ", kind);
866 strbuf_addf(¬e, "'%s' of ", what);
867 }
868 switch (rm->fetch_head_status) {
869 case FETCH_HEAD_NOT_FOR_MERGE:
870 merge_status_marker = "not-for-merge";
871 /* fall-through */
872 case FETCH_HEAD_MERGE:
873 fprintf(fp, "%s\t%s\t%s",
874 oid_to_hex(&rm->old_oid),
875 merge_status_marker,
876 note.buf);
877 for (i = 0; i < url_len; ++i)
878 if ('\n' == url[i])
879 fputs("\\n", fp);
880 else
881 fputc(url[i], fp);
882 fputc('\n', fp);
883 break;
884 default:
885 /* do not write anything to FETCH_HEAD */
886 break;
887 }
888
889 strbuf_reset(¬e);
890 if (ref) {
891 rc |= update_local_ref(ref, what, rm, ¬e,
892 summary_width);
893 free(ref);
894 } else
895 format_display(¬e, '*',
896 *kind ? kind : "branch", NULL,
897 *what ? what : "HEAD",
898 "FETCH_HEAD", summary_width);
899 if (note.len) {
900 if (verbosity >= 0 && !shown_url) {
901 fprintf(stderr, _("From %.*s\n"),
902 url_len, url);
903 shown_url = 1;
904 }
905 if (verbosity >= 0)
906 fprintf(stderr, " %s\n", note.buf);
907 }
908 }
909 }
910
911 if (rc & STORE_REF_ERROR_DF_CONFLICT)
912 error(_("some local refs could not be updated; try running\n"
913 " 'git remote prune %s' to remove any old, conflicting "
914 "branches"), remote_name);
915
916 abort:
917 strbuf_release(¬e);
918 free(url);
919 fclose(fp);
920 return rc;
921}
922
923/*
924 * We would want to bypass the object transfer altogether if
925 * everything we are going to fetch already exists and is connected
926 * locally.
927 */
928static int quickfetch(struct ref *ref_map)
929{
930 struct ref *rm = ref_map;
931 struct check_connected_options opt = CHECK_CONNECTED_INIT;
932
933 /*
934 * If we are deepening a shallow clone we already have these
935 * objects reachable. Running rev-list here will return with
936 * a good (0) exit status and we'll bypass the fetch that we
937 * really need to perform. Claiming failure now will ensure
938 * we perform the network exchange to deepen our history.
939 */
940 if (deepen)
941 return -1;
942 opt.quiet = 1;
943 return check_connected(iterate_ref_map, &rm, &opt);
944}
945
946static int fetch_refs(struct transport *transport, struct ref *ref_map)
947{
948 int ret = quickfetch(ref_map);
949 if (ret)
950 ret = transport_fetch_refs(transport, ref_map);
951 if (!ret)
952 /*
953 * Keep the new pack's ".keep" file around to allow the caller
954 * time to update refs to reference the new objects.
955 */
956 return 0;
957 transport_unlock_pack(transport);
958 return ret;
959}
960
961/* Update local refs based on the ref values fetched from a remote */
962static int consume_refs(struct transport *transport, struct ref *ref_map)
963{
964 int connectivity_checked = transport->smart_options
965 ? transport->smart_options->connectivity_checked : 0;
966 int ret = store_updated_refs(transport->url,
967 transport->remote->name,
968 connectivity_checked,
969 ref_map);
970 transport_unlock_pack(transport);
971 return ret;
972}
973
974static int prune_refs(struct refspec *rs, struct ref *ref_map,
975 const char *raw_url)
976{
977 int url_len, i, result = 0;
978 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
979 char *url;
980 int summary_width = transport_summary_width(stale_refs);
981 const char *dangling_msg = dry_run
982 ? _(" (%s will become dangling)")
983 : _(" (%s has become dangling)");
984
985 if (raw_url)
986 url = transport_anonymize_url(raw_url);
987 else
988 url = xstrdup("foreign");
989
990 url_len = strlen(url);
991 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
992 ;
993
994 url_len = i + 1;
995 if (4 < i && !strncmp(".git", url + i - 3, 4))
996 url_len = i - 3;
997
998 if (!dry_run) {
999 struct string_list refnames = STRING_LIST_INIT_NODUP;
1000
1001 for (ref = stale_refs; ref; ref = ref->next)
1002 string_list_append(&refnames, ref->name);
1003
1004 result = delete_refs("fetch: prune", &refnames, 0);
1005 string_list_clear(&refnames, 0);
1006 }
1007
1008 if (verbosity >= 0) {
1009 for (ref = stale_refs; ref; ref = ref->next) {
1010 struct strbuf sb = STRBUF_INIT;
1011 if (!shown_url) {
1012 fprintf(stderr, _("From %.*s\n"), url_len, url);
1013 shown_url = 1;
1014 }
1015 format_display(&sb, '-', _("[deleted]"), NULL,
1016 _("(none)"), prettify_refname(ref->name),
1017 summary_width);
1018 fprintf(stderr, " %s\n",sb.buf);
1019 strbuf_release(&sb);
1020 warn_dangling_symref(stderr, dangling_msg, ref->name);
1021 }
1022 }
1023
1024 free(url);
1025 free_refs(stale_refs);
1026 return result;
1027}
1028
1029static void check_not_current_branch(struct ref *ref_map)
1030{
1031 struct branch *current_branch = branch_get(NULL);
1032
1033 if (is_bare_repository() || !current_branch)
1034 return;
1035
1036 for (; ref_map; ref_map = ref_map->next)
1037 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1038 ref_map->peer_ref->name))
1039 die(_("Refusing to fetch into current branch %s "
1040 "of non-bare repository"), current_branch->refname);
1041}
1042
1043static int truncate_fetch_head(void)
1044{
1045 const char *filename = git_path_fetch_head(the_repository);
1046 FILE *fp = fopen_for_writing(filename);
1047
1048 if (!fp)
1049 return error_errno(_("cannot open %s"), filename);
1050 fclose(fp);
1051 return 0;
1052}
1053
1054static void set_option(struct transport *transport, const char *name, const char *value)
1055{
1056 int r = transport_set_option(transport, name, value);
1057 if (r < 0)
1058 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1059 name, value, transport->url);
1060 if (r > 0)
1061 warning(_("Option \"%s\" is ignored for %s\n"),
1062 name, transport->url);
1063}
1064
1065
1066static int add_oid(const char *refname, const struct object_id *oid, int flags,
1067 void *cb_data)
1068{
1069 struct oid_array *oids = cb_data;
1070
1071 oid_array_append(oids, oid);
1072 return 0;
1073}
1074
1075static void add_negotiation_tips(struct git_transport_options *smart_options)
1076{
1077 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1078 int i;
1079
1080 for (i = 0; i < negotiation_tip.nr; i++) {
1081 const char *s = negotiation_tip.items[i].string;
1082 int old_nr;
1083 if (!has_glob_specials(s)) {
1084 struct object_id oid;
1085 if (get_oid(s, &oid))
1086 die("%s is not a valid object", s);
1087 oid_array_append(oids, &oid);
1088 continue;
1089 }
1090 old_nr = oids->nr;
1091 for_each_glob_ref(add_oid, s, oids);
1092 if (old_nr == oids->nr)
1093 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1094 s);
1095 }
1096 smart_options->negotiation_tips = oids;
1097}
1098
1099static struct transport *prepare_transport(struct remote *remote, int deepen)
1100{
1101 struct transport *transport;
1102 transport = transport_get(remote, NULL);
1103 transport_set_verbosity(transport, verbosity, progress);
1104 transport->family = family;
1105 if (upload_pack)
1106 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1107 if (keep)
1108 set_option(transport, TRANS_OPT_KEEP, "yes");
1109 if (depth)
1110 set_option(transport, TRANS_OPT_DEPTH, depth);
1111 if (deepen && deepen_since)
1112 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1113 if (deepen && deepen_not.nr)
1114 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1115 (const char *)&deepen_not);
1116 if (deepen_relative)
1117 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1118 if (update_shallow)
1119 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1120 if (filter_options.choice) {
1121 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1122 filter_options.filter_spec);
1123 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1124 }
1125 if (negotiation_tip.nr) {
1126 if (transport->smart_options)
1127 add_negotiation_tips(transport->smart_options);
1128 else
1129 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1130 }
1131 return transport;
1132}
1133
1134static void backfill_tags(struct transport *transport, struct ref *ref_map)
1135{
1136 int cannot_reuse;
1137
1138 /*
1139 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1140 * when remote helper is used (setting it to an empty string
1141 * is not unsetting). We could extend the remote helper
1142 * protocol for that, but for now, just force a new connection
1143 * without deepen-since. Similar story for deepen-not.
1144 */
1145 cannot_reuse = transport->cannot_reuse ||
1146 deepen_since || deepen_not.nr;
1147 if (cannot_reuse) {
1148 gsecondary = prepare_transport(transport->remote, 0);
1149 transport = gsecondary;
1150 }
1151
1152 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1153 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1154 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1155 if (!fetch_refs(transport, ref_map))
1156 consume_refs(transport, ref_map);
1157
1158 if (gsecondary) {
1159 transport_disconnect(gsecondary);
1160 gsecondary = NULL;
1161 }
1162}
1163
1164static int do_fetch(struct transport *transport,
1165 struct refspec *rs)
1166{
1167 struct ref *ref_map;
1168 int autotags = (transport->remote->fetch_tags == 1);
1169 int retcode = 0;
1170 const struct ref *remote_refs;
1171 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1172
1173 if (tags == TAGS_DEFAULT) {
1174 if (transport->remote->fetch_tags == 2)
1175 tags = TAGS_SET;
1176 if (transport->remote->fetch_tags == -1)
1177 tags = TAGS_UNSET;
1178 }
1179
1180 /* if not appending, truncate FETCH_HEAD */
1181 if (!append && !dry_run) {
1182 retcode = truncate_fetch_head();
1183 if (retcode)
1184 goto cleanup;
1185 }
1186
1187 if (rs->nr)
1188 refspec_ref_prefixes(rs, &ref_prefixes);
1189 else if (transport->remote && transport->remote->fetch.nr)
1190 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1191
1192 if (ref_prefixes.argc &&
1193 (tags == TAGS_SET || (tags == TAGS_DEFAULT))) {
1194 argv_array_push(&ref_prefixes, "refs/tags/");
1195 }
1196
1197 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1198 argv_array_clear(&ref_prefixes);
1199
1200 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1201 tags, &autotags);
1202 if (!update_head_ok)
1203 check_not_current_branch(ref_map);
1204
1205 if (tags == TAGS_DEFAULT && autotags)
1206 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1207 if (prune) {
1208 /*
1209 * We only prune based on refspecs specified
1210 * explicitly (via command line or configuration); we
1211 * don't care whether --tags was specified.
1212 */
1213 if (rs->nr) {
1214 prune_refs(rs, ref_map, transport->url);
1215 } else {
1216 prune_refs(&transport->remote->fetch,
1217 ref_map,
1218 transport->url);
1219 }
1220 }
1221 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1222 free_refs(ref_map);
1223 retcode = 1;
1224 goto cleanup;
1225 }
1226 free_refs(ref_map);
1227
1228 /* if neither --no-tags nor --tags was specified, do automated tag
1229 * following ... */
1230 if (tags == TAGS_DEFAULT && autotags) {
1231 struct ref **tail = &ref_map;
1232 ref_map = NULL;
1233 find_non_local_tags(remote_refs, &ref_map, &tail);
1234 if (ref_map)
1235 backfill_tags(transport, ref_map);
1236 free_refs(ref_map);
1237 }
1238
1239 cleanup:
1240 return retcode;
1241}
1242
1243static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1244{
1245 struct string_list *list = priv;
1246 if (!remote->skip_default_update)
1247 string_list_append(list, remote->name);
1248 return 0;
1249}
1250
1251struct remote_group_data {
1252 const char *name;
1253 struct string_list *list;
1254};
1255
1256static int get_remote_group(const char *key, const char *value, void *priv)
1257{
1258 struct remote_group_data *g = priv;
1259
1260 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1261 /* split list by white space */
1262 while (*value) {
1263 size_t wordlen = strcspn(value, " \t\n");
1264
1265 if (wordlen >= 1)
1266 string_list_append_nodup(g->list,
1267 xstrndup(value, wordlen));
1268 value += wordlen + (value[wordlen] != '\0');
1269 }
1270 }
1271
1272 return 0;
1273}
1274
1275static int add_remote_or_group(const char *name, struct string_list *list)
1276{
1277 int prev_nr = list->nr;
1278 struct remote_group_data g;
1279 g.name = name; g.list = list;
1280
1281 git_config(get_remote_group, &g);
1282 if (list->nr == prev_nr) {
1283 struct remote *remote = remote_get(name);
1284 if (!remote_is_configured(remote, 0))
1285 return 0;
1286 string_list_append(list, remote->name);
1287 }
1288 return 1;
1289}
1290
1291static void add_options_to_argv(struct argv_array *argv)
1292{
1293 if (dry_run)
1294 argv_array_push(argv, "--dry-run");
1295 if (prune != -1)
1296 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1297 if (prune_tags != -1)
1298 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1299 if (update_head_ok)
1300 argv_array_push(argv, "--update-head-ok");
1301 if (force)
1302 argv_array_push(argv, "--force");
1303 if (keep)
1304 argv_array_push(argv, "--keep");
1305 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1306 argv_array_push(argv, "--recurse-submodules");
1307 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1308 argv_array_push(argv, "--recurse-submodules=on-demand");
1309 if (tags == TAGS_SET)
1310 argv_array_push(argv, "--tags");
1311 else if (tags == TAGS_UNSET)
1312 argv_array_push(argv, "--no-tags");
1313 if (verbosity >= 2)
1314 argv_array_push(argv, "-v");
1315 if (verbosity >= 1)
1316 argv_array_push(argv, "-v");
1317 else if (verbosity < 0)
1318 argv_array_push(argv, "-q");
1319
1320}
1321
1322static int fetch_multiple(struct string_list *list)
1323{
1324 int i, result = 0;
1325 struct argv_array argv = ARGV_ARRAY_INIT;
1326
1327 if (!append && !dry_run) {
1328 int errcode = truncate_fetch_head();
1329 if (errcode)
1330 return errcode;
1331 }
1332
1333 argv_array_pushl(&argv, "fetch", "--append", NULL);
1334 add_options_to_argv(&argv);
1335
1336 for (i = 0; i < list->nr; i++) {
1337 const char *name = list->items[i].string;
1338 argv_array_push(&argv, name);
1339 if (verbosity >= 0)
1340 printf(_("Fetching %s\n"), name);
1341 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1342 error(_("Could not fetch %s"), name);
1343 result = 1;
1344 }
1345 argv_array_pop(&argv);
1346 }
1347
1348 argv_array_clear(&argv);
1349 return result;
1350}
1351
1352/*
1353 * Fetching from the promisor remote should use the given filter-spec
1354 * or inherit the default filter-spec from the config.
1355 */
1356static inline void fetch_one_setup_partial(struct remote *remote)
1357{
1358 /*
1359 * Explicit --no-filter argument overrides everything, regardless
1360 * of any prior partial clones and fetches.
1361 */
1362 if (filter_options.no_filter)
1363 return;
1364
1365 /*
1366 * If no prior partial clone/fetch and the current fetch DID NOT
1367 * request a partial-fetch, do a normal fetch.
1368 */
1369 if (!repository_format_partial_clone && !filter_options.choice)
1370 return;
1371
1372 /*
1373 * If this is the FIRST partial-fetch request, we enable partial
1374 * on this repo and remember the given filter-spec as the default
1375 * for subsequent fetches to this remote.
1376 */
1377 if (!repository_format_partial_clone && filter_options.choice) {
1378 partial_clone_register(remote->name, &filter_options);
1379 return;
1380 }
1381
1382 /*
1383 * We are currently limited to only ONE promisor remote and only
1384 * allow partial-fetches from the promisor remote.
1385 */
1386 if (strcmp(remote->name, repository_format_partial_clone)) {
1387 if (filter_options.choice)
1388 die(_("--filter can only be used with the remote configured in core.partialClone"));
1389 return;
1390 }
1391
1392 /*
1393 * Do a partial-fetch from the promisor remote using either the
1394 * explicitly given filter-spec or inherit the filter-spec from
1395 * the config.
1396 */
1397 if (!filter_options.choice)
1398 partial_clone_get_default_filter_spec(&filter_options);
1399 return;
1400}
1401
1402static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1403{
1404 struct refspec rs = REFSPEC_INIT_FETCH;
1405 int i;
1406 int exit_code;
1407 int maybe_prune_tags;
1408 int remote_via_config = remote_is_configured(remote, 0);
1409
1410 if (!remote)
1411 die(_("No remote repository specified. Please, specify either a URL or a\n"
1412 "remote name from which new revisions should be fetched."));
1413
1414 gtransport = prepare_transport(remote, 1);
1415
1416 if (prune < 0) {
1417 /* no command line request */
1418 if (0 <= remote->prune)
1419 prune = remote->prune;
1420 else if (0 <= fetch_prune_config)
1421 prune = fetch_prune_config;
1422 else
1423 prune = PRUNE_BY_DEFAULT;
1424 }
1425
1426 if (prune_tags < 0) {
1427 /* no command line request */
1428 if (0 <= remote->prune_tags)
1429 prune_tags = remote->prune_tags;
1430 else if (0 <= fetch_prune_tags_config)
1431 prune_tags = fetch_prune_tags_config;
1432 else
1433 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1434 }
1435
1436 maybe_prune_tags = prune_tags_ok && prune_tags;
1437 if (maybe_prune_tags && remote_via_config)
1438 refspec_append(&remote->fetch, TAG_REFSPEC);
1439
1440 if (maybe_prune_tags && (argc || !remote_via_config))
1441 refspec_append(&rs, TAG_REFSPEC);
1442
1443 for (i = 0; i < argc; i++) {
1444 if (!strcmp(argv[i], "tag")) {
1445 char *tag;
1446 i++;
1447 if (i >= argc)
1448 die(_("You need to specify a tag name."));
1449
1450 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1451 argv[i], argv[i]);
1452 refspec_append(&rs, tag);
1453 free(tag);
1454 } else {
1455 refspec_append(&rs, argv[i]);
1456 }
1457 }
1458
1459 if (server_options.nr)
1460 gtransport->server_options = &server_options;
1461
1462 sigchain_push_common(unlock_pack_on_signal);
1463 atexit(unlock_pack);
1464 exit_code = do_fetch(gtransport, &rs);
1465 refspec_clear(&rs);
1466 transport_disconnect(gtransport);
1467 gtransport = NULL;
1468 return exit_code;
1469}
1470
1471int cmd_fetch(int argc, const char **argv, const char *prefix)
1472{
1473 int i;
1474 struct string_list list = STRING_LIST_INIT_DUP;
1475 struct remote *remote = NULL;
1476 int result = 0;
1477 int prune_tags_ok = 1;
1478 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1479
1480 packet_trace_identity("fetch");
1481
1482 fetch_if_missing = 0;
1483
1484 /* Record the command line for the reflog */
1485 strbuf_addstr(&default_rla, "fetch");
1486 for (i = 1; i < argc; i++)
1487 strbuf_addf(&default_rla, " %s", argv[i]);
1488
1489 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1490 git_config(git_fetch_config, NULL);
1491
1492 argc = parse_options(argc, argv, prefix,
1493 builtin_fetch_options, builtin_fetch_usage, 0);
1494
1495 if (deepen_relative) {
1496 if (deepen_relative < 0)
1497 die(_("Negative depth in --deepen is not supported"));
1498 if (depth)
1499 die(_("--deepen and --depth are mutually exclusive"));
1500 depth = xstrfmt("%d", deepen_relative);
1501 }
1502 if (unshallow) {
1503 if (depth)
1504 die(_("--depth and --unshallow cannot be used together"));
1505 else if (!is_repository_shallow(the_repository))
1506 die(_("--unshallow on a complete repository does not make sense"));
1507 else
1508 depth = xstrfmt("%d", INFINITE_DEPTH);
1509 }
1510
1511 /* no need to be strict, transport_set_option() will validate it again */
1512 if (depth && atoi(depth) < 1)
1513 die(_("depth %s is not a positive number"), depth);
1514 if (depth || deepen_since || deepen_not.nr)
1515 deepen = 1;
1516
1517 if (filter_options.choice && !repository_format_partial_clone)
1518 die("--filter can only be used when extensions.partialClone is set");
1519
1520 if (all) {
1521 if (argc == 1)
1522 die(_("fetch --all does not take a repository argument"));
1523 else if (argc > 1)
1524 die(_("fetch --all does not make sense with refspecs"));
1525 (void) for_each_remote(get_one_remote_for_fetch, &list);
1526 } else if (argc == 0) {
1527 /* No arguments -- use default remote */
1528 remote = remote_get(NULL);
1529 } else if (multiple) {
1530 /* All arguments are assumed to be remotes or groups */
1531 for (i = 0; i < argc; i++)
1532 if (!add_remote_or_group(argv[i], &list))
1533 die(_("No such remote or remote group: %s"), argv[i]);
1534 } else {
1535 /* Single remote or group */
1536 (void) add_remote_or_group(argv[0], &list);
1537 if (list.nr > 1) {
1538 /* More than one remote */
1539 if (argc > 1)
1540 die(_("Fetching a group and specifying refspecs does not make sense"));
1541 } else {
1542 /* Zero or one remotes */
1543 remote = remote_get(argv[0]);
1544 prune_tags_ok = (argc == 1);
1545 argc--;
1546 argv++;
1547 }
1548 }
1549
1550 if (remote) {
1551 if (filter_options.choice || repository_format_partial_clone)
1552 fetch_one_setup_partial(remote);
1553 result = fetch_one(remote, argc, argv, prune_tags_ok);
1554 } else {
1555 if (filter_options.choice)
1556 die(_("--filter can only be used with the remote configured in core.partialClone"));
1557 /* TODO should this also die if we have a previous partial-clone? */
1558 result = fetch_multiple(&list);
1559 }
1560
1561 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1562 struct argv_array options = ARGV_ARRAY_INIT;
1563
1564 add_options_to_argv(&options);
1565 result = fetch_populated_submodules(the_repository,
1566 &options,
1567 submodule_prefix,
1568 recurse_submodules,
1569 recurse_submodules_default,
1570 verbosity < 0,
1571 max_children);
1572 argv_array_clear(&options);
1573 }
1574
1575 string_list_clear(&list, 0);
1576
1577 close_all_packs(the_repository->objects);
1578
1579 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1580 if (verbosity < 0)
1581 argv_array_push(&argv_gc_auto, "--quiet");
1582 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1583 argv_array_clear(&argv_gc_auto);
1584
1585 return result;
1586}