4ba63d5ac642844832a5c832cea93ddf99507764
[git/git.git] / builtin / fetch.c
1 /*
2 * "git fetch"
3 */
4 #include "cache.h"
5 #include "config.h"
6 #include "repository.h"
7 #include "refs.h"
8 #include "refspec.h"
9 #include "object-store.h"
10 #include "commit.h"
11 #include "builtin.h"
12 #include "string-list.h"
13 #include "remote.h"
14 #include "transport.h"
15 #include "run-command.h"
16 #include "parse-options.h"
17 #include "sigchain.h"
18 #include "submodule-config.h"
19 #include "submodule.h"
20 #include "connected.h"
21 #include "argv-array.h"
22 #include "utf8.h"
23 #include "packfile.h"
24 #include "list-objects-filter-options.h"
25 #include "commit-reach.h"
26
27 static 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
35 enum {
36 TAGS_UNSET = 0,
37 TAGS_DEFAULT = 1,
38 TAGS_SET = 2
39 };
40
41 static int fetch_prune_config = -1; /* unspecified */
42 static int prune = -1; /* unspecified */
43 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
44
45 static int fetch_prune_tags_config = -1; /* unspecified */
46 static int prune_tags = -1; /* unspecified */
47 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
48
49 static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative;
50 static int progress = -1;
51 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
52 static int max_children = 1;
53 static enum transport_family family;
54 static const char *depth;
55 static const char *deepen_since;
56 static const char *upload_pack;
57 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
58 static struct strbuf default_rla = STRBUF_INIT;
59 static struct transport *gtransport;
60 static struct transport *gsecondary;
61 static const char *submodule_prefix = "";
62 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
63 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
64 static int shown_url = 0;
65 static struct refspec refmap = REFSPEC_INIT_FETCH;
66 static struct list_objects_filter_options filter_options;
67 static struct string_list server_options = STRING_LIST_INIT_DUP;
68 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
69
70 static 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
99 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
100 {
101 BUG_ON_OPT_NEG(unset);
102
103 /*
104 * "git fetch --refmap='' origin foo"
105 * can be used to tell the command not to store anywhere
106 */
107 refspec_append(&refmap, arg);
108
109 return 0;
110 }
111
112 static struct option builtin_fetch_options[] = {
113 OPT__VERBOSITY(&verbosity),
114 OPT_BOOL(0, "all", &all,
115 N_("fetch from all remotes")),
116 OPT_BOOL('a', "append", &append,
117 N_("append to .git/FETCH_HEAD instead of overwriting")),
118 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
119 N_("path to upload pack on remote end")),
120 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
121 OPT_BOOL('m', "multiple", &multiple,
122 N_("fetch from multiple remotes")),
123 OPT_SET_INT('t', "tags", &tags,
124 N_("fetch all tags and associated objects"), TAGS_SET),
125 OPT_SET_INT('n', NULL, &tags,
126 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
127 OPT_INTEGER('j', "jobs", &max_children,
128 N_("number of submodules fetched in parallel")),
129 OPT_BOOL('p', "prune", &prune,
130 N_("prune remote-tracking branches no longer on remote")),
131 OPT_BOOL('P', "prune-tags", &prune_tags,
132 N_("prune local tags no longer on remote and clobber changed tags")),
133 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
134 N_("control recursive fetching of submodules"),
135 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
136 OPT_BOOL(0, "dry-run", &dry_run,
137 N_("dry run")),
138 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
139 OPT_BOOL('u', "update-head-ok", &update_head_ok,
140 N_("allow updating of HEAD ref")),
141 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
142 OPT_STRING(0, "depth", &depth, N_("depth"),
143 N_("deepen history of shallow clone")),
144 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
145 N_("deepen history of shallow repository based on time")),
146 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
147 N_("deepen history of shallow clone, excluding rev")),
148 OPT_INTEGER(0, "deepen", &deepen_relative,
149 N_("deepen history of shallow clone")),
150 OPT_SET_INT_F(0, "unshallow", &unshallow,
151 N_("convert to a complete repository"),
152 1, PARSE_OPT_NONEG),
153 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
154 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
155 { OPTION_CALLBACK, 0, "recurse-submodules-default",
156 &recurse_submodules_default, N_("on-demand"),
157 N_("default for recursive fetching of submodules "
158 "(lower priority than config files)"),
159 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
160 OPT_BOOL(0, "update-shallow", &update_shallow,
161 N_("accept refs that update .git/shallow")),
162 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
163 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
164 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
165 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
166 TRANSPORT_FAMILY_IPV4),
167 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
168 TRANSPORT_FAMILY_IPV6),
169 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
170 N_("report that we have only objects reachable from this object")),
171 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
172 OPT_END()
173 };
174
175 static void unlock_pack(void)
176 {
177 if (gtransport)
178 transport_unlock_pack(gtransport);
179 if (gsecondary)
180 transport_unlock_pack(gsecondary);
181 }
182
183 static void unlock_pack_on_signal(int signo)
184 {
185 unlock_pack();
186 sigchain_pop(signo);
187 raise(signo);
188 }
189
190 static void add_merge_config(struct ref **head,
191 const struct ref *remote_refs,
192 struct branch *branch,
193 struct ref ***tail)
194 {
195 int i;
196
197 for (i = 0; i < branch->merge_nr; i++) {
198 struct ref *rm, **old_tail = *tail;
199 struct refspec_item refspec;
200
201 for (rm = *head; rm; rm = rm->next) {
202 if (branch_merge_matches(branch, i, rm->name)) {
203 rm->fetch_head_status = FETCH_HEAD_MERGE;
204 break;
205 }
206 }
207 if (rm)
208 continue;
209
210 /*
211 * Not fetched to a remote-tracking branch? We need to fetch
212 * it anyway to allow this branch's "branch.$name.merge"
213 * to be honored by 'git pull', but we do not have to
214 * fail if branch.$name.merge is misconfigured to point
215 * at a nonexisting branch. If we were indeed called by
216 * 'git pull', it will notice the misconfiguration because
217 * there is no entry in the resulting FETCH_HEAD marked
218 * for merging.
219 */
220 memset(&refspec, 0, sizeof(refspec));
221 refspec.src = branch->merge[i]->src;
222 get_fetch_map(remote_refs, &refspec, tail, 1);
223 for (rm = *old_tail; rm; rm = rm->next)
224 rm->fetch_head_status = FETCH_HEAD_MERGE;
225 }
226 }
227
228 static int will_fetch(struct ref **head, const unsigned char *sha1)
229 {
230 struct ref *rm = *head;
231 while (rm) {
232 if (hasheq(rm->old_oid.hash, sha1))
233 return 1;
234 rm = rm->next;
235 }
236 return 0;
237 }
238
239 struct refname_hash_entry {
240 struct hashmap_entry ent; /* must be the first member */
241 struct object_id oid;
242 char refname[FLEX_ARRAY];
243 };
244
245 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
246 const void *e1_,
247 const void *e2_,
248 const void *keydata)
249 {
250 const struct refname_hash_entry *e1 = e1_;
251 const struct refname_hash_entry *e2 = e2_;
252
253 return strcmp(e1->refname, keydata ? keydata : e2->refname);
254 }
255
256 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
257 const char *refname,
258 const struct object_id *oid)
259 {
260 struct refname_hash_entry *ent;
261 size_t len = strlen(refname);
262
263 FLEX_ALLOC_MEM(ent, refname, refname, len);
264 hashmap_entry_init(ent, strhash(refname));
265 oidcpy(&ent->oid, oid);
266 hashmap_add(map, ent);
267 return ent;
268 }
269
270 static int add_one_refname(const char *refname,
271 const struct object_id *oid,
272 int flag, void *cbdata)
273 {
274 struct hashmap *refname_map = cbdata;
275
276 (void) refname_hash_add(refname_map, refname, oid);
277 return 0;
278 }
279
280 static void refname_hash_init(struct hashmap *map)
281 {
282 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
283 }
284
285 static int refname_hash_exists(struct hashmap *map, const char *refname)
286 {
287 return !!hashmap_get_from_hash(map, strhash(refname), refname);
288 }
289
290 static void find_non_local_tags(const struct ref *refs,
291 struct ref **head,
292 struct ref ***tail)
293 {
294 struct hashmap existing_refs;
295 struct hashmap remote_refs;
296 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
297 struct string_list_item *remote_ref_item;
298 const struct ref *ref;
299 struct refname_hash_entry *item = NULL;
300
301 refname_hash_init(&existing_refs);
302 refname_hash_init(&remote_refs);
303
304 for_each_ref(add_one_refname, &existing_refs);
305 for (ref = refs; ref; ref = ref->next) {
306 if (!starts_with(ref->name, "refs/tags/"))
307 continue;
308
309 /*
310 * The peeled ref always follows the matching base
311 * ref, so if we see a peeled ref that we don't want
312 * to fetch then we can mark the ref entry in the list
313 * as one to ignore by setting util to NULL.
314 */
315 if (ends_with(ref->name, "^{}")) {
316 if (item &&
317 !has_object_file_with_flags(&ref->old_oid,
318 OBJECT_INFO_QUICK) &&
319 !will_fetch(head, ref->old_oid.hash) &&
320 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
321 !will_fetch(head, item->oid.hash))
322 oidclr(&item->oid);
323 item = NULL;
324 continue;
325 }
326
327 /*
328 * If item is non-NULL here, then we previously saw a
329 * ref not followed by a peeled reference, so we need
330 * to check if it is a lightweight tag that we want to
331 * fetch.
332 */
333 if (item &&
334 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
335 !will_fetch(head, item->oid.hash))
336 oidclr(&item->oid);
337
338 item = NULL;
339
340 /* skip duplicates and refs that we already have */
341 if (refname_hash_exists(&remote_refs, ref->name) ||
342 refname_hash_exists(&existing_refs, ref->name))
343 continue;
344
345 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
346 string_list_insert(&remote_refs_list, ref->name);
347 }
348 hashmap_free(&existing_refs, 1);
349
350 /*
351 * We may have a final lightweight tag that needs to be
352 * checked to see if it needs fetching.
353 */
354 if (item &&
355 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
356 !will_fetch(head, item->oid.hash))
357 oidclr(&item->oid);
358
359 /*
360 * For all the tags in the remote_refs_list,
361 * add them to the list of refs to be fetched
362 */
363 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
364 const char *refname = remote_ref_item->string;
365
366 item = hashmap_get_from_hash(&remote_refs, strhash(refname), refname);
367 if (!item)
368 BUG("unseen remote ref?");
369
370 /* Unless we have already decided to ignore this item... */
371 if (!is_null_oid(&item->oid)) {
372 struct ref *rm = alloc_ref(item->refname);
373 rm->peer_ref = alloc_ref(item->refname);
374 oidcpy(&rm->old_oid, &item->oid);
375 **tail = rm;
376 *tail = &rm->next;
377 }
378 }
379 hashmap_free(&remote_refs, 1);
380 string_list_clear(&remote_refs_list, 0);
381 }
382
383 static struct ref *get_ref_map(struct remote *remote,
384 const struct ref *remote_refs,
385 struct refspec *rs,
386 int tags, int *autotags)
387 {
388 int i;
389 struct ref *rm;
390 struct ref *ref_map = NULL;
391 struct ref **tail = &ref_map;
392
393 /* opportunistically-updated references: */
394 struct ref *orefs = NULL, **oref_tail = &orefs;
395
396 struct hashmap existing_refs;
397
398 if (rs->nr) {
399 struct refspec *fetch_refspec;
400
401 for (i = 0; i < rs->nr; i++) {
402 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
403 if (rs->items[i].dst && rs->items[i].dst[0])
404 *autotags = 1;
405 }
406 /* Merge everything on the command line (but not --tags) */
407 for (rm = ref_map; rm; rm = rm->next)
408 rm->fetch_head_status = FETCH_HEAD_MERGE;
409
410 /*
411 * For any refs that we happen to be fetching via
412 * command-line arguments, the destination ref might
413 * have been missing or have been different than the
414 * remote-tracking ref that would be derived from the
415 * configured refspec. In these cases, we want to
416 * take the opportunity to update their configured
417 * remote-tracking reference. However, we do not want
418 * to mention these entries in FETCH_HEAD at all, as
419 * they would simply be duplicates of existing
420 * entries, so we set them FETCH_HEAD_IGNORE below.
421 *
422 * We compute these entries now, based only on the
423 * refspecs specified on the command line. But we add
424 * them to the list following the refspecs resulting
425 * from the tags option so that one of the latter,
426 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
427 * by ref_remove_duplicates() in favor of one of these
428 * opportunistic entries with FETCH_HEAD_IGNORE.
429 */
430 if (refmap.nr)
431 fetch_refspec = &refmap;
432 else
433 fetch_refspec = &remote->fetch;
434
435 for (i = 0; i < fetch_refspec->nr; i++)
436 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
437 } else if (refmap.nr) {
438 die("--refmap option is only meaningful with command-line refspec(s).");
439 } else {
440 /* Use the defaults */
441 struct branch *branch = branch_get(NULL);
442 int has_merge = branch_has_merge_config(branch);
443 if (remote &&
444 (remote->fetch.nr ||
445 /* Note: has_merge implies non-NULL branch->remote_name */
446 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
447 for (i = 0; i < remote->fetch.nr; i++) {
448 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
449 if (remote->fetch.items[i].dst &&
450 remote->fetch.items[i].dst[0])
451 *autotags = 1;
452 if (!i && !has_merge && ref_map &&
453 !remote->fetch.items[0].pattern)
454 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
455 }
456 /*
457 * if the remote we're fetching from is the same
458 * as given in branch.<name>.remote, we add the
459 * ref given in branch.<name>.merge, too.
460 *
461 * Note: has_merge implies non-NULL branch->remote_name
462 */
463 if (has_merge &&
464 !strcmp(branch->remote_name, remote->name))
465 add_merge_config(&ref_map, remote_refs, branch, &tail);
466 } else {
467 ref_map = get_remote_ref(remote_refs, "HEAD");
468 if (!ref_map)
469 die(_("Couldn't find remote ref HEAD"));
470 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
471 tail = &ref_map->next;
472 }
473 }
474
475 if (tags == TAGS_SET)
476 /* also fetch all tags */
477 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
478 else if (tags == TAGS_DEFAULT && *autotags)
479 find_non_local_tags(remote_refs, &ref_map, &tail);
480
481 /* Now append any refs to be updated opportunistically: */
482 *tail = orefs;
483 for (rm = orefs; rm; rm = rm->next) {
484 rm->fetch_head_status = FETCH_HEAD_IGNORE;
485 tail = &rm->next;
486 }
487
488 ref_map = ref_remove_duplicates(ref_map);
489
490 refname_hash_init(&existing_refs);
491 for_each_ref(add_one_refname, &existing_refs);
492
493 for (rm = ref_map; rm; rm = rm->next) {
494 if (rm->peer_ref) {
495 const char *refname = rm->peer_ref->name;
496 struct refname_hash_entry *peer_item;
497
498 peer_item = hashmap_get_from_hash(&existing_refs,
499 strhash(refname),
500 refname);
501 if (peer_item) {
502 struct object_id *old_oid = &peer_item->oid;
503 oidcpy(&rm->peer_ref->old_oid, old_oid);
504 }
505 }
506 }
507 hashmap_free(&existing_refs, 1);
508
509 return ref_map;
510 }
511
512 #define STORE_REF_ERROR_OTHER 1
513 #define STORE_REF_ERROR_DF_CONFLICT 2
514
515 static int s_update_ref(const char *action,
516 struct ref *ref,
517 int check_old)
518 {
519 char *msg;
520 char *rla = getenv("GIT_REFLOG_ACTION");
521 struct ref_transaction *transaction;
522 struct strbuf err = STRBUF_INIT;
523 int ret, df_conflict = 0;
524
525 if (dry_run)
526 return 0;
527 if (!rla)
528 rla = default_rla.buf;
529 msg = xstrfmt("%s: %s", rla, action);
530
531 transaction = ref_transaction_begin(&err);
532 if (!transaction ||
533 ref_transaction_update(transaction, ref->name,
534 &ref->new_oid,
535 check_old ? &ref->old_oid : NULL,
536 0, msg, &err))
537 goto fail;
538
539 ret = ref_transaction_commit(transaction, &err);
540 if (ret) {
541 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
542 goto fail;
543 }
544
545 ref_transaction_free(transaction);
546 strbuf_release(&err);
547 free(msg);
548 return 0;
549 fail:
550 ref_transaction_free(transaction);
551 error("%s", err.buf);
552 strbuf_release(&err);
553 free(msg);
554 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
555 : STORE_REF_ERROR_OTHER;
556 }
557
558 static int refcol_width = 10;
559 static int compact_format;
560
561 static void adjust_refcol_width(const struct ref *ref)
562 {
563 int max, rlen, llen, len;
564
565 /* uptodate lines are only shown on high verbosity level */
566 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
567 return;
568
569 max = term_columns();
570 rlen = utf8_strwidth(prettify_refname(ref->name));
571
572 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
573
574 /*
575 * rough estimation to see if the output line is too long and
576 * should not be counted (we can't do precise calculation
577 * anyway because we don't know if the error explanation part
578 * will be printed in update_local_ref)
579 */
580 if (compact_format) {
581 llen = 0;
582 max = max * 2 / 3;
583 }
584 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
585 if (len >= max)
586 return;
587
588 /*
589 * Not precise calculation for compact mode because '*' can
590 * appear on the left hand side of '->' and shrink the column
591 * back.
592 */
593 if (refcol_width < rlen)
594 refcol_width = rlen;
595 }
596
597 static void prepare_format_display(struct ref *ref_map)
598 {
599 struct ref *rm;
600 const char *format = "full";
601
602 git_config_get_string_const("fetch.output", &format);
603 if (!strcasecmp(format, "full"))
604 compact_format = 0;
605 else if (!strcasecmp(format, "compact"))
606 compact_format = 1;
607 else
608 die(_("configuration fetch.output contains invalid value %s"),
609 format);
610
611 for (rm = ref_map; rm; rm = rm->next) {
612 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
613 !rm->peer_ref ||
614 !strcmp(rm->name, "HEAD"))
615 continue;
616
617 adjust_refcol_width(rm);
618 }
619 }
620
621 static void print_remote_to_local(struct strbuf *display,
622 const char *remote, const char *local)
623 {
624 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
625 }
626
627 static int find_and_replace(struct strbuf *haystack,
628 const char *needle,
629 const char *placeholder)
630 {
631 const char *p = NULL;
632 int plen, nlen;
633
634 nlen = strlen(needle);
635 if (ends_with(haystack->buf, needle))
636 p = haystack->buf + haystack->len - nlen;
637 else
638 p = strstr(haystack->buf, needle);
639 if (!p)
640 return 0;
641
642 if (p > haystack->buf && p[-1] != '/')
643 return 0;
644
645 plen = strlen(p);
646 if (plen > nlen && p[nlen] != '/')
647 return 0;
648
649 strbuf_splice(haystack, p - haystack->buf, nlen,
650 placeholder, strlen(placeholder));
651 return 1;
652 }
653
654 static void print_compact(struct strbuf *display,
655 const char *remote, const char *local)
656 {
657 struct strbuf r = STRBUF_INIT;
658 struct strbuf l = STRBUF_INIT;
659
660 if (!strcmp(remote, local)) {
661 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
662 return;
663 }
664
665 strbuf_addstr(&r, remote);
666 strbuf_addstr(&l, local);
667
668 if (!find_and_replace(&r, local, "*"))
669 find_and_replace(&l, remote, "*");
670 print_remote_to_local(display, r.buf, l.buf);
671
672 strbuf_release(&r);
673 strbuf_release(&l);
674 }
675
676 static void format_display(struct strbuf *display, char code,
677 const char *summary, const char *error,
678 const char *remote, const char *local,
679 int summary_width)
680 {
681 int width = (summary_width + strlen(summary) - gettext_width(summary));
682
683 strbuf_addf(display, "%c %-*s ", code, width, summary);
684 if (!compact_format)
685 print_remote_to_local(display, remote, local);
686 else
687 print_compact(display, remote, local);
688 if (error)
689 strbuf_addf(display, " (%s)", error);
690 }
691
692 static int update_local_ref(struct ref *ref,
693 const char *remote,
694 const struct ref *remote_ref,
695 struct strbuf *display,
696 int summary_width)
697 {
698 struct commit *current = NULL, *updated;
699 enum object_type type;
700 struct branch *current_branch = branch_get(NULL);
701 const char *pretty_ref = prettify_refname(ref->name);
702
703 type = oid_object_info(the_repository, &ref->new_oid, NULL);
704 if (type < 0)
705 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
706
707 if (oideq(&ref->old_oid, &ref->new_oid)) {
708 if (verbosity > 0)
709 format_display(display, '=', _("[up to date]"), NULL,
710 remote, pretty_ref, summary_width);
711 return 0;
712 }
713
714 if (current_branch &&
715 !strcmp(ref->name, current_branch->name) &&
716 !(update_head_ok || is_bare_repository()) &&
717 !is_null_oid(&ref->old_oid)) {
718 /*
719 * If this is the head, and it's not okay to update
720 * the head, and the old value of the head isn't empty...
721 */
722 format_display(display, '!', _("[rejected]"),
723 _("can't fetch in current branch"),
724 remote, pretty_ref, summary_width);
725 return 1;
726 }
727
728 if (!is_null_oid(&ref->old_oid) &&
729 starts_with(ref->name, "refs/tags/")) {
730 if (force || ref->force) {
731 int r;
732 r = s_update_ref("updating tag", ref, 0);
733 format_display(display, r ? '!' : 't', _("[tag update]"),
734 r ? _("unable to update local ref") : NULL,
735 remote, pretty_ref, summary_width);
736 return r;
737 } else {
738 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
739 remote, pretty_ref, summary_width);
740 return 1;
741 }
742 }
743
744 current = lookup_commit_reference_gently(the_repository,
745 &ref->old_oid, 1);
746 updated = lookup_commit_reference_gently(the_repository,
747 &ref->new_oid, 1);
748 if (!current || !updated) {
749 const char *msg;
750 const char *what;
751 int r;
752 /*
753 * Nicely describe the new ref we're fetching.
754 * Base this on the remote's ref name, as it's
755 * more likely to follow a standard layout.
756 */
757 const char *name = remote_ref ? remote_ref->name : "";
758 if (starts_with(name, "refs/tags/")) {
759 msg = "storing tag";
760 what = _("[new tag]");
761 } else if (starts_with(name, "refs/heads/")) {
762 msg = "storing head";
763 what = _("[new branch]");
764 } else {
765 msg = "storing ref";
766 what = _("[new ref]");
767 }
768
769 r = s_update_ref(msg, ref, 0);
770 format_display(display, r ? '!' : '*', what,
771 r ? _("unable to update local ref") : NULL,
772 remote, pretty_ref, summary_width);
773 return r;
774 }
775
776 if (in_merge_bases(current, updated)) {
777 struct strbuf quickref = STRBUF_INIT;
778 int r;
779 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
780 strbuf_addstr(&quickref, "..");
781 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
782 r = s_update_ref("fast-forward", ref, 1);
783 format_display(display, r ? '!' : ' ', quickref.buf,
784 r ? _("unable to update local ref") : NULL,
785 remote, pretty_ref, summary_width);
786 strbuf_release(&quickref);
787 return r;
788 } else if (force || ref->force) {
789 struct strbuf quickref = STRBUF_INIT;
790 int r;
791 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
792 strbuf_addstr(&quickref, "...");
793 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
794 r = s_update_ref("forced-update", ref, 1);
795 format_display(display, r ? '!' : '+', quickref.buf,
796 r ? _("unable to update local ref") : _("forced update"),
797 remote, pretty_ref, summary_width);
798 strbuf_release(&quickref);
799 return r;
800 } else {
801 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
802 remote, pretty_ref, summary_width);
803 return 1;
804 }
805 }
806
807 static int iterate_ref_map(void *cb_data, struct object_id *oid)
808 {
809 struct ref **rm = cb_data;
810 struct ref *ref = *rm;
811
812 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
813 ref = ref->next;
814 if (!ref)
815 return -1; /* end of the list */
816 *rm = ref->next;
817 oidcpy(oid, &ref->old_oid);
818 return 0;
819 }
820
821 static int store_updated_refs(const char *raw_url, const char *remote_name,
822 int connectivity_checked, struct ref *ref_map)
823 {
824 FILE *fp;
825 struct commit *commit;
826 int url_len, i, rc = 0;
827 struct strbuf note = STRBUF_INIT;
828 const char *what, *kind;
829 struct ref *rm;
830 char *url;
831 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
832 int want_status;
833 int summary_width = transport_summary_width(ref_map);
834
835 fp = fopen(filename, "a");
836 if (!fp)
837 return error_errno(_("cannot open %s"), filename);
838
839 if (raw_url)
840 url = transport_anonymize_url(raw_url);
841 else
842 url = xstrdup("foreign");
843
844 if (!connectivity_checked) {
845 rm = ref_map;
846 if (check_connected(iterate_ref_map, &rm, NULL)) {
847 rc = error(_("%s did not send all necessary objects\n"), url);
848 goto abort;
849 }
850 }
851
852 prepare_format_display(ref_map);
853
854 /*
855 * We do a pass for each fetch_head_status type in their enum order, so
856 * merged entries are written before not-for-merge. That lets readers
857 * use FETCH_HEAD as a refname to refer to the ref to be merged.
858 */
859 for (want_status = FETCH_HEAD_MERGE;
860 want_status <= FETCH_HEAD_IGNORE;
861 want_status++) {
862 for (rm = ref_map; rm; rm = rm->next) {
863 struct ref *ref = NULL;
864 const char *merge_status_marker = "";
865
866 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
867 if (want_status == FETCH_HEAD_MERGE)
868 warning(_("reject %s because shallow roots are not allowed to be updated"),
869 rm->peer_ref ? rm->peer_ref->name : rm->name);
870 continue;
871 }
872
873 commit = lookup_commit_reference_gently(the_repository,
874 &rm->old_oid,
875 1);
876 if (!commit)
877 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
878
879 if (rm->fetch_head_status != want_status)
880 continue;
881
882 if (rm->peer_ref) {
883 ref = alloc_ref(rm->peer_ref->name);
884 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
885 oidcpy(&ref->new_oid, &rm->old_oid);
886 ref->force = rm->peer_ref->force;
887 }
888
889 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
890 check_for_new_submodule_commits(&rm->old_oid);
891
892 if (!strcmp(rm->name, "HEAD")) {
893 kind = "";
894 what = "";
895 }
896 else if (starts_with(rm->name, "refs/heads/")) {
897 kind = "branch";
898 what = rm->name + 11;
899 }
900 else if (starts_with(rm->name, "refs/tags/")) {
901 kind = "tag";
902 what = rm->name + 10;
903 }
904 else if (starts_with(rm->name, "refs/remotes/")) {
905 kind = "remote-tracking branch";
906 what = rm->name + 13;
907 }
908 else {
909 kind = "";
910 what = rm->name;
911 }
912
913 url_len = strlen(url);
914 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
915 ;
916 url_len = i + 1;
917 if (4 < i && !strncmp(".git", url + i - 3, 4))
918 url_len = i - 3;
919
920 strbuf_reset(&note);
921 if (*what) {
922 if (*kind)
923 strbuf_addf(&note, "%s ", kind);
924 strbuf_addf(&note, "'%s' of ", what);
925 }
926 switch (rm->fetch_head_status) {
927 case FETCH_HEAD_NOT_FOR_MERGE:
928 merge_status_marker = "not-for-merge";
929 /* fall-through */
930 case FETCH_HEAD_MERGE:
931 fprintf(fp, "%s\t%s\t%s",
932 oid_to_hex(&rm->old_oid),
933 merge_status_marker,
934 note.buf);
935 for (i = 0; i < url_len; ++i)
936 if ('\n' == url[i])
937 fputs("\\n", fp);
938 else
939 fputc(url[i], fp);
940 fputc('\n', fp);
941 break;
942 default:
943 /* do not write anything to FETCH_HEAD */
944 break;
945 }
946
947 strbuf_reset(&note);
948 if (ref) {
949 rc |= update_local_ref(ref, what, rm, &note,
950 summary_width);
951 free(ref);
952 } else
953 format_display(&note, '*',
954 *kind ? kind : "branch", NULL,
955 *what ? what : "HEAD",
956 "FETCH_HEAD", summary_width);
957 if (note.len) {
958 if (verbosity >= 0 && !shown_url) {
959 fprintf(stderr, _("From %.*s\n"),
960 url_len, url);
961 shown_url = 1;
962 }
963 if (verbosity >= 0)
964 fprintf(stderr, " %s\n", note.buf);
965 }
966 }
967 }
968
969 if (rc & STORE_REF_ERROR_DF_CONFLICT)
970 error(_("some local refs could not be updated; try running\n"
971 " 'git remote prune %s' to remove any old, conflicting "
972 "branches"), remote_name);
973
974 abort:
975 strbuf_release(&note);
976 free(url);
977 fclose(fp);
978 return rc;
979 }
980
981 /*
982 * We would want to bypass the object transfer altogether if
983 * everything we are going to fetch already exists and is connected
984 * locally.
985 */
986 static int check_exist_and_connected(struct ref *ref_map)
987 {
988 struct ref *rm = ref_map;
989 struct check_connected_options opt = CHECK_CONNECTED_INIT;
990 struct ref *r;
991
992 /*
993 * If we are deepening a shallow clone we already have these
994 * objects reachable. Running rev-list here will return with
995 * a good (0) exit status and we'll bypass the fetch that we
996 * really need to perform. Claiming failure now will ensure
997 * we perform the network exchange to deepen our history.
998 */
999 if (deepen)
1000 return -1;
1001
1002 /*
1003 * check_connected() allows objects to merely be promised, but
1004 * we need all direct targets to exist.
1005 */
1006 for (r = rm; r; r = r->next) {
1007 if (!has_object_file(&r->old_oid))
1008 return -1;
1009 }
1010
1011 opt.quiet = 1;
1012 return check_connected(iterate_ref_map, &rm, &opt);
1013 }
1014
1015 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1016 {
1017 int ret = check_exist_and_connected(ref_map);
1018 if (ret)
1019 ret = transport_fetch_refs(transport, ref_map);
1020 if (!ret)
1021 /*
1022 * Keep the new pack's ".keep" file around to allow the caller
1023 * time to update refs to reference the new objects.
1024 */
1025 return 0;
1026 transport_unlock_pack(transport);
1027 return ret;
1028 }
1029
1030 /* Update local refs based on the ref values fetched from a remote */
1031 static int consume_refs(struct transport *transport, struct ref *ref_map)
1032 {
1033 int connectivity_checked = transport->smart_options
1034 ? transport->smart_options->connectivity_checked : 0;
1035 int ret = store_updated_refs(transport->url,
1036 transport->remote->name,
1037 connectivity_checked,
1038 ref_map);
1039 transport_unlock_pack(transport);
1040 return ret;
1041 }
1042
1043 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1044 const char *raw_url)
1045 {
1046 int url_len, i, result = 0;
1047 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1048 char *url;
1049 int summary_width = transport_summary_width(stale_refs);
1050 const char *dangling_msg = dry_run
1051 ? _(" (%s will become dangling)")
1052 : _(" (%s has become dangling)");
1053
1054 if (raw_url)
1055 url = transport_anonymize_url(raw_url);
1056 else
1057 url = xstrdup("foreign");
1058
1059 url_len = strlen(url);
1060 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1061 ;
1062
1063 url_len = i + 1;
1064 if (4 < i && !strncmp(".git", url + i - 3, 4))
1065 url_len = i - 3;
1066
1067 if (!dry_run) {
1068 struct string_list refnames = STRING_LIST_INIT_NODUP;
1069
1070 for (ref = stale_refs; ref; ref = ref->next)
1071 string_list_append(&refnames, ref->name);
1072
1073 result = delete_refs("fetch: prune", &refnames, 0);
1074 string_list_clear(&refnames, 0);
1075 }
1076
1077 if (verbosity >= 0) {
1078 for (ref = stale_refs; ref; ref = ref->next) {
1079 struct strbuf sb = STRBUF_INIT;
1080 if (!shown_url) {
1081 fprintf(stderr, _("From %.*s\n"), url_len, url);
1082 shown_url = 1;
1083 }
1084 format_display(&sb, '-', _("[deleted]"), NULL,
1085 _("(none)"), prettify_refname(ref->name),
1086 summary_width);
1087 fprintf(stderr, " %s\n",sb.buf);
1088 strbuf_release(&sb);
1089 warn_dangling_symref(stderr, dangling_msg, ref->name);
1090 }
1091 }
1092
1093 free(url);
1094 free_refs(stale_refs);
1095 return result;
1096 }
1097
1098 static void check_not_current_branch(struct ref *ref_map)
1099 {
1100 struct branch *current_branch = branch_get(NULL);
1101
1102 if (is_bare_repository() || !current_branch)
1103 return;
1104
1105 for (; ref_map; ref_map = ref_map->next)
1106 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1107 ref_map->peer_ref->name))
1108 die(_("Refusing to fetch into current branch %s "
1109 "of non-bare repository"), current_branch->refname);
1110 }
1111
1112 static int truncate_fetch_head(void)
1113 {
1114 const char *filename = git_path_fetch_head(the_repository);
1115 FILE *fp = fopen_for_writing(filename);
1116
1117 if (!fp)
1118 return error_errno(_("cannot open %s"), filename);
1119 fclose(fp);
1120 return 0;
1121 }
1122
1123 static void set_option(struct transport *transport, const char *name, const char *value)
1124 {
1125 int r = transport_set_option(transport, name, value);
1126 if (r < 0)
1127 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1128 name, value, transport->url);
1129 if (r > 0)
1130 warning(_("Option \"%s\" is ignored for %s\n"),
1131 name, transport->url);
1132 }
1133
1134
1135 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1136 void *cb_data)
1137 {
1138 struct oid_array *oids = cb_data;
1139
1140 oid_array_append(oids, oid);
1141 return 0;
1142 }
1143
1144 static void add_negotiation_tips(struct git_transport_options *smart_options)
1145 {
1146 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1147 int i;
1148
1149 for (i = 0; i < negotiation_tip.nr; i++) {
1150 const char *s = negotiation_tip.items[i].string;
1151 int old_nr;
1152 if (!has_glob_specials(s)) {
1153 struct object_id oid;
1154 if (get_oid(s, &oid))
1155 die("%s is not a valid object", s);
1156 oid_array_append(oids, &oid);
1157 continue;
1158 }
1159 old_nr = oids->nr;
1160 for_each_glob_ref(add_oid, s, oids);
1161 if (old_nr == oids->nr)
1162 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1163 s);
1164 }
1165 smart_options->negotiation_tips = oids;
1166 }
1167
1168 static struct transport *prepare_transport(struct remote *remote, int deepen)
1169 {
1170 struct transport *transport;
1171
1172 transport = transport_get(remote, NULL);
1173 transport_set_verbosity(transport, verbosity, progress);
1174 transport->family = family;
1175 if (upload_pack)
1176 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1177 if (keep)
1178 set_option(transport, TRANS_OPT_KEEP, "yes");
1179 if (depth)
1180 set_option(transport, TRANS_OPT_DEPTH, depth);
1181 if (deepen && deepen_since)
1182 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1183 if (deepen && deepen_not.nr)
1184 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1185 (const char *)&deepen_not);
1186 if (deepen_relative)
1187 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1188 if (update_shallow)
1189 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1190 if (filter_options.choice) {
1191 struct strbuf expanded_filter_spec = STRBUF_INIT;
1192 expand_list_objects_filter_spec(&filter_options,
1193 &expanded_filter_spec);
1194 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER,
1195 expanded_filter_spec.buf);
1196 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1197 strbuf_release(&expanded_filter_spec);
1198 }
1199 if (negotiation_tip.nr) {
1200 if (transport->smart_options)
1201 add_negotiation_tips(transport->smart_options);
1202 else
1203 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1204 }
1205 return transport;
1206 }
1207
1208 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1209 {
1210 int cannot_reuse;
1211
1212 /*
1213 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1214 * when remote helper is used (setting it to an empty string
1215 * is not unsetting). We could extend the remote helper
1216 * protocol for that, but for now, just force a new connection
1217 * without deepen-since. Similar story for deepen-not.
1218 */
1219 cannot_reuse = transport->cannot_reuse ||
1220 deepen_since || deepen_not.nr;
1221 if (cannot_reuse) {
1222 gsecondary = prepare_transport(transport->remote, 0);
1223 transport = gsecondary;
1224 }
1225
1226 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1227 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1228 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1229 if (!fetch_refs(transport, ref_map))
1230 consume_refs(transport, ref_map);
1231
1232 if (gsecondary) {
1233 transport_disconnect(gsecondary);
1234 gsecondary = NULL;
1235 }
1236 }
1237
1238 static int do_fetch(struct transport *transport,
1239 struct refspec *rs)
1240 {
1241 struct ref *ref_map;
1242 int autotags = (transport->remote->fetch_tags == 1);
1243 int retcode = 0;
1244 const struct ref *remote_refs;
1245 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1246 int must_list_refs = 1;
1247
1248 if (tags == TAGS_DEFAULT) {
1249 if (transport->remote->fetch_tags == 2)
1250 tags = TAGS_SET;
1251 if (transport->remote->fetch_tags == -1)
1252 tags = TAGS_UNSET;
1253 }
1254
1255 /* if not appending, truncate FETCH_HEAD */
1256 if (!append && !dry_run) {
1257 retcode = truncate_fetch_head();
1258 if (retcode)
1259 goto cleanup;
1260 }
1261
1262 if (rs->nr) {
1263 int i;
1264
1265 refspec_ref_prefixes(rs, &ref_prefixes);
1266
1267 /*
1268 * We can avoid listing refs if all of them are exact
1269 * OIDs
1270 */
1271 must_list_refs = 0;
1272 for (i = 0; i < rs->nr; i++) {
1273 if (!rs->items[i].exact_sha1) {
1274 must_list_refs = 1;
1275 break;
1276 }
1277 }
1278 } else if (transport->remote && transport->remote->fetch.nr)
1279 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1280
1281 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1282 must_list_refs = 1;
1283 if (ref_prefixes.argc)
1284 argv_array_push(&ref_prefixes, "refs/tags/");
1285 }
1286
1287 if (must_list_refs)
1288 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1289 else
1290 remote_refs = NULL;
1291
1292 argv_array_clear(&ref_prefixes);
1293
1294 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1295 tags, &autotags);
1296 if (!update_head_ok)
1297 check_not_current_branch(ref_map);
1298
1299 if (tags == TAGS_DEFAULT && autotags)
1300 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1301 if (prune) {
1302 /*
1303 * We only prune based on refspecs specified
1304 * explicitly (via command line or configuration); we
1305 * don't care whether --tags was specified.
1306 */
1307 if (rs->nr) {
1308 prune_refs(rs, ref_map, transport->url);
1309 } else {
1310 prune_refs(&transport->remote->fetch,
1311 ref_map,
1312 transport->url);
1313 }
1314 }
1315 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1316 free_refs(ref_map);
1317 retcode = 1;
1318 goto cleanup;
1319 }
1320 free_refs(ref_map);
1321
1322 /* if neither --no-tags nor --tags was specified, do automated tag
1323 * following ... */
1324 if (tags == TAGS_DEFAULT && autotags) {
1325 struct ref **tail = &ref_map;
1326 ref_map = NULL;
1327 find_non_local_tags(remote_refs, &ref_map, &tail);
1328 if (ref_map)
1329 backfill_tags(transport, ref_map);
1330 free_refs(ref_map);
1331 }
1332
1333 cleanup:
1334 return retcode;
1335 }
1336
1337 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1338 {
1339 struct string_list *list = priv;
1340 if (!remote->skip_default_update)
1341 string_list_append(list, remote->name);
1342 return 0;
1343 }
1344
1345 struct remote_group_data {
1346 const char *name;
1347 struct string_list *list;
1348 };
1349
1350 static int get_remote_group(const char *key, const char *value, void *priv)
1351 {
1352 struct remote_group_data *g = priv;
1353
1354 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1355 /* split list by white space */
1356 while (*value) {
1357 size_t wordlen = strcspn(value, " \t\n");
1358
1359 if (wordlen >= 1)
1360 string_list_append_nodup(g->list,
1361 xstrndup(value, wordlen));
1362 value += wordlen + (value[wordlen] != '\0');
1363 }
1364 }
1365
1366 return 0;
1367 }
1368
1369 static int add_remote_or_group(const char *name, struct string_list *list)
1370 {
1371 int prev_nr = list->nr;
1372 struct remote_group_data g;
1373 g.name = name; g.list = list;
1374
1375 git_config(get_remote_group, &g);
1376 if (list->nr == prev_nr) {
1377 struct remote *remote = remote_get(name);
1378 if (!remote_is_configured(remote, 0))
1379 return 0;
1380 string_list_append(list, remote->name);
1381 }
1382 return 1;
1383 }
1384
1385 static void add_options_to_argv(struct argv_array *argv)
1386 {
1387 if (dry_run)
1388 argv_array_push(argv, "--dry-run");
1389 if (prune != -1)
1390 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1391 if (prune_tags != -1)
1392 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1393 if (update_head_ok)
1394 argv_array_push(argv, "--update-head-ok");
1395 if (force)
1396 argv_array_push(argv, "--force");
1397 if (keep)
1398 argv_array_push(argv, "--keep");
1399 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1400 argv_array_push(argv, "--recurse-submodules");
1401 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1402 argv_array_push(argv, "--recurse-submodules=on-demand");
1403 if (tags == TAGS_SET)
1404 argv_array_push(argv, "--tags");
1405 else if (tags == TAGS_UNSET)
1406 argv_array_push(argv, "--no-tags");
1407 if (verbosity >= 2)
1408 argv_array_push(argv, "-v");
1409 if (verbosity >= 1)
1410 argv_array_push(argv, "-v");
1411 else if (verbosity < 0)
1412 argv_array_push(argv, "-q");
1413
1414 }
1415
1416 static int fetch_multiple(struct string_list *list)
1417 {
1418 int i, result = 0;
1419 struct argv_array argv = ARGV_ARRAY_INIT;
1420
1421 if (!append && !dry_run) {
1422 int errcode = truncate_fetch_head();
1423 if (errcode)
1424 return errcode;
1425 }
1426
1427 argv_array_pushl(&argv, "fetch", "--append", NULL);
1428 add_options_to_argv(&argv);
1429
1430 for (i = 0; i < list->nr; i++) {
1431 const char *name = list->items[i].string;
1432 argv_array_push(&argv, name);
1433 if (verbosity >= 0)
1434 printf(_("Fetching %s\n"), name);
1435 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1436 error(_("Could not fetch %s"), name);
1437 result = 1;
1438 }
1439 argv_array_pop(&argv);
1440 }
1441
1442 argv_array_clear(&argv);
1443 return result;
1444 }
1445
1446 /*
1447 * Fetching from the promisor remote should use the given filter-spec
1448 * or inherit the default filter-spec from the config.
1449 */
1450 static inline void fetch_one_setup_partial(struct remote *remote)
1451 {
1452 /*
1453 * Explicit --no-filter argument overrides everything, regardless
1454 * of any prior partial clones and fetches.
1455 */
1456 if (filter_options.no_filter)
1457 return;
1458
1459 /*
1460 * If no prior partial clone/fetch and the current fetch DID NOT
1461 * request a partial-fetch, do a normal fetch.
1462 */
1463 if (!repository_format_partial_clone && !filter_options.choice)
1464 return;
1465
1466 /*
1467 * If this is the FIRST partial-fetch request, we enable partial
1468 * on this repo and remember the given filter-spec as the default
1469 * for subsequent fetches to this remote.
1470 */
1471 if (!repository_format_partial_clone && filter_options.choice) {
1472 partial_clone_register(remote->name, &filter_options);
1473 return;
1474 }
1475
1476 /*
1477 * We are currently limited to only ONE promisor remote and only
1478 * allow partial-fetches from the promisor remote.
1479 */
1480 if (strcmp(remote->name, repository_format_partial_clone)) {
1481 if (filter_options.choice)
1482 die(_("--filter can only be used with the remote "
1483 "configured in extensions.partialClone"));
1484 return;
1485 }
1486
1487 /*
1488 * Do a partial-fetch from the promisor remote using either the
1489 * explicitly given filter-spec or inherit the filter-spec from
1490 * the config.
1491 */
1492 if (!filter_options.choice)
1493 partial_clone_get_default_filter_spec(&filter_options);
1494 return;
1495 }
1496
1497 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1498 {
1499 struct refspec rs = REFSPEC_INIT_FETCH;
1500 int i;
1501 int exit_code;
1502 int maybe_prune_tags;
1503 int remote_via_config = remote_is_configured(remote, 0);
1504
1505 if (!remote)
1506 die(_("No remote repository specified. Please, specify either a URL or a\n"
1507 "remote name from which new revisions should be fetched."));
1508
1509 gtransport = prepare_transport(remote, 1);
1510
1511 if (prune < 0) {
1512 /* no command line request */
1513 if (0 <= remote->prune)
1514 prune = remote->prune;
1515 else if (0 <= fetch_prune_config)
1516 prune = fetch_prune_config;
1517 else
1518 prune = PRUNE_BY_DEFAULT;
1519 }
1520
1521 if (prune_tags < 0) {
1522 /* no command line request */
1523 if (0 <= remote->prune_tags)
1524 prune_tags = remote->prune_tags;
1525 else if (0 <= fetch_prune_tags_config)
1526 prune_tags = fetch_prune_tags_config;
1527 else
1528 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1529 }
1530
1531 maybe_prune_tags = prune_tags_ok && prune_tags;
1532 if (maybe_prune_tags && remote_via_config)
1533 refspec_append(&remote->fetch, TAG_REFSPEC);
1534
1535 if (maybe_prune_tags && (argc || !remote_via_config))
1536 refspec_append(&rs, TAG_REFSPEC);
1537
1538 for (i = 0; i < argc; i++) {
1539 if (!strcmp(argv[i], "tag")) {
1540 char *tag;
1541 i++;
1542 if (i >= argc)
1543 die(_("You need to specify a tag name."));
1544
1545 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1546 argv[i], argv[i]);
1547 refspec_append(&rs, tag);
1548 free(tag);
1549 } else {
1550 refspec_append(&rs, argv[i]);
1551 }
1552 }
1553
1554 if (server_options.nr)
1555 gtransport->server_options = &server_options;
1556
1557 sigchain_push_common(unlock_pack_on_signal);
1558 atexit(unlock_pack);
1559 sigchain_push(SIGPIPE, SIG_IGN);
1560 exit_code = do_fetch(gtransport, &rs);
1561 sigchain_pop(SIGPIPE);
1562 refspec_clear(&rs);
1563 transport_disconnect(gtransport);
1564 gtransport = NULL;
1565 return exit_code;
1566 }
1567
1568 int cmd_fetch(int argc, const char **argv, const char *prefix)
1569 {
1570 int i;
1571 struct string_list list = STRING_LIST_INIT_DUP;
1572 struct remote *remote = NULL;
1573 int result = 0;
1574 int prune_tags_ok = 1;
1575 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1576
1577 packet_trace_identity("fetch");
1578
1579 fetch_if_missing = 0;
1580
1581 /* Record the command line for the reflog */
1582 strbuf_addstr(&default_rla, "fetch");
1583 for (i = 1; i < argc; i++)
1584 strbuf_addf(&default_rla, " %s", argv[i]);
1585
1586 fetch_config_from_gitmodules(&max_children, &recurse_submodules);
1587 git_config(git_fetch_config, NULL);
1588
1589 argc = parse_options(argc, argv, prefix,
1590 builtin_fetch_options, builtin_fetch_usage, 0);
1591
1592 if (deepen_relative) {
1593 if (deepen_relative < 0)
1594 die(_("Negative depth in --deepen is not supported"));
1595 if (depth)
1596 die(_("--deepen and --depth are mutually exclusive"));
1597 depth = xstrfmt("%d", deepen_relative);
1598 }
1599 if (unshallow) {
1600 if (depth)
1601 die(_("--depth and --unshallow cannot be used together"));
1602 else if (!is_repository_shallow(the_repository))
1603 die(_("--unshallow on a complete repository does not make sense"));
1604 else
1605 depth = xstrfmt("%d", INFINITE_DEPTH);
1606 }
1607
1608 /* no need to be strict, transport_set_option() will validate it again */
1609 if (depth && atoi(depth) < 1)
1610 die(_("depth %s is not a positive number"), depth);
1611 if (depth || deepen_since || deepen_not.nr)
1612 deepen = 1;
1613
1614 if (filter_options.choice && !repository_format_partial_clone)
1615 die("--filter can only be used when extensions.partialClone is set");
1616
1617 if (all) {
1618 if (argc == 1)
1619 die(_("fetch --all does not take a repository argument"));
1620 else if (argc > 1)
1621 die(_("fetch --all does not make sense with refspecs"));
1622 (void) for_each_remote(get_one_remote_for_fetch, &list);
1623 } else if (argc == 0) {
1624 /* No arguments -- use default remote */
1625 remote = remote_get(NULL);
1626 } else if (multiple) {
1627 /* All arguments are assumed to be remotes or groups */
1628 for (i = 0; i < argc; i++)
1629 if (!add_remote_or_group(argv[i], &list))
1630 die(_("No such remote or remote group: %s"), argv[i]);
1631 } else {
1632 /* Single remote or group */
1633 (void) add_remote_or_group(argv[0], &list);
1634 if (list.nr > 1) {
1635 /* More than one remote */
1636 if (argc > 1)
1637 die(_("Fetching a group and specifying refspecs does not make sense"));
1638 } else {
1639 /* Zero or one remotes */
1640 remote = remote_get(argv[0]);
1641 prune_tags_ok = (argc == 1);
1642 argc--;
1643 argv++;
1644 }
1645 }
1646
1647 if (remote) {
1648 if (filter_options.choice || repository_format_partial_clone)
1649 fetch_one_setup_partial(remote);
1650 result = fetch_one(remote, argc, argv, prune_tags_ok);
1651 } else {
1652 if (filter_options.choice)
1653 die(_("--filter can only be used with the remote "
1654 "configured in extensions.partialclone"));
1655 /* TODO should this also die if we have a previous partial-clone? */
1656 result = fetch_multiple(&list);
1657 }
1658
1659 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1660 struct argv_array options = ARGV_ARRAY_INIT;
1661
1662 add_options_to_argv(&options);
1663 result = fetch_populated_submodules(the_repository,
1664 &options,
1665 submodule_prefix,
1666 recurse_submodules,
1667 recurse_submodules_default,
1668 verbosity < 0,
1669 max_children);
1670 argv_array_clear(&options);
1671 }
1672
1673 string_list_clear(&list, 0);
1674
1675 close_all_packs(the_repository->objects);
1676
1677 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1678 if (verbosity < 0)
1679 argv_array_push(&argv_gc_auto, "--quiet");
1680 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1681 argv_array_clear(&argv_gc_auto);
1682
1683 return result;
1684 }