]> git.ipfire.org Git - thirdparty/git.git/blob - builtin/fetch.c
projects / thirdparty / git.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Merge branch 'dl/format-patch-doc-test-cleanup'
[thirdparty/git.git] / builtin / fetch.c
1 /*
2 * "git fetch"
3 */
4 #include "cache.h"
5 #include "config.h"
6 #include "repository.h"
7 #include "refs.h"
8 #include "refspec.h"
9 #include "object-store.h"
10 #include "oidset.h"
11 #include "commit.h"
12 #include "builtin.h"
13 #include "string-list.h"
14 #include "remote.h"
15 #include "transport.h"
16 #include "run-command.h"
17 #include "parse-options.h"
18 #include "sigchain.h"
19 #include "submodule-config.h"
20 #include "submodule.h"
21 #include "connected.h"
22 #include "argv-array.h"
23 #include "utf8.h"
24 #include "packfile.h"
25 #include "list-objects-filter-options.h"
26 #include "commit-reach.h"
27 #include "branch.h"
28 #include "promisor-remote.h"
29 #include "commit-graph.h"
30
31 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
32
33 static const char * const builtin_fetch_usage[] = {
34 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
35 N_("git fetch [<options>] <group>"),
36 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
37 N_("git fetch --all [<options>]"),
38 NULL
39 };
40
41 enum {
42 TAGS_UNSET = 0,
43 TAGS_DEFAULT = 1,
44 TAGS_SET = 2
45 };
46
47 static int fetch_prune_config = -1; /* unspecified */
48 static int fetch_show_forced_updates = 1;
49 static uint64_t forced_updates_ms = 0;
50 static int prune = -1; /* unspecified */
51 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
52
53 static int fetch_prune_tags_config = -1; /* unspecified */
54 static int prune_tags = -1; /* unspecified */
55 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
56
57 static int all, append, dry_run, force, keep, multiple, update_head_ok;
58 static int verbosity, deepen_relative, set_upstream;
59 static int progress = -1;
60 static int enable_auto_gc = 1;
61 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
62 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
63 static int fetch_parallel_config = 1;
64 static enum transport_family family;
65 static const char *depth;
66 static const char *deepen_since;
67 static const char *upload_pack;
68 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
69 static struct strbuf default_rla = STRBUF_INIT;
70 static struct transport *gtransport;
71 static struct transport *gsecondary;
72 static const char *submodule_prefix = "";
73 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
74 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
75 static int shown_url = 0;
76 static struct refspec refmap = REFSPEC_INIT_FETCH;
77 static struct list_objects_filter_options filter_options;
78 static struct string_list server_options = STRING_LIST_INIT_DUP;
79 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
80
81 static int git_fetch_config(const char *k, const char *v, void *cb)
82 {
83 if (!strcmp(k, "fetch.prune")) {
84 fetch_prune_config = git_config_bool(k, v);
85 return 0;
86 }
87
88 if (!strcmp(k, "fetch.prunetags")) {
89 fetch_prune_tags_config = git_config_bool(k, v);
90 return 0;
91 }
92
93 if (!strcmp(k, "fetch.showforcedupdates")) {
94 fetch_show_forced_updates = git_config_bool(k, v);
95 return 0;
96 }
97
98 if (!strcmp(k, "submodule.recurse")) {
99 int r = git_config_bool(k, v) ?
100 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
101 recurse_submodules = r;
102 }
103
104 if (!strcmp(k, "submodule.fetchjobs")) {
105 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
106 return 0;
107 } else if (!strcmp(k, "fetch.recursesubmodules")) {
108 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
109 return 0;
110 }
111
112 if (!strcmp(k, "fetch.parallel")) {
113 fetch_parallel_config = git_config_int(k, v);
114 if (fetch_parallel_config < 0)
115 die(_("fetch.parallel cannot be negative"));
116 return 0;
117 }
118
119 return git_default_config(k, v, cb);
120 }
121
122 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
123 {
124 BUG_ON_OPT_NEG(unset);
125
126 /*
127 * "git fetch --refmap='' origin foo"
128 * can be used to tell the command not to store anywhere
129 */
130 refspec_append(&refmap, arg);
131
132 return 0;
133 }
134
135 static struct option builtin_fetch_options[] = {
136 OPT__VERBOSITY(&verbosity),
137 OPT_BOOL(0, "all", &all,
138 N_("fetch from all remotes")),
139 OPT_BOOL(0, "set-upstream", &set_upstream,
140 N_("set upstream for git pull/fetch")),
141 OPT_BOOL('a', "append", &append,
142 N_("append to .git/FETCH_HEAD instead of overwriting")),
143 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
144 N_("path to upload pack on remote end")),
145 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
146 OPT_BOOL('m', "multiple", &multiple,
147 N_("fetch from multiple remotes")),
148 OPT_SET_INT('t', "tags", &tags,
149 N_("fetch all tags and associated objects"), TAGS_SET),
150 OPT_SET_INT('n', NULL, &tags,
151 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
152 OPT_INTEGER('j', "jobs", &max_jobs,
153 N_("number of submodules fetched in parallel")),
154 OPT_BOOL('p', "prune", &prune,
155 N_("prune remote-tracking branches no longer on remote")),
156 OPT_BOOL('P', "prune-tags", &prune_tags,
157 N_("prune local tags no longer on remote and clobber changed tags")),
158 { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
159 N_("control recursive fetching of submodules"),
160 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules },
161 OPT_BOOL(0, "dry-run", &dry_run,
162 N_("dry run")),
163 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
164 OPT_BOOL('u', "update-head-ok", &update_head_ok,
165 N_("allow updating of HEAD ref")),
166 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
167 OPT_STRING(0, "depth", &depth, N_("depth"),
168 N_("deepen history of shallow clone")),
169 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
170 N_("deepen history of shallow repository based on time")),
171 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
172 N_("deepen history of shallow clone, excluding rev")),
173 OPT_INTEGER(0, "deepen", &deepen_relative,
174 N_("deepen history of shallow clone")),
175 OPT_SET_INT_F(0, "unshallow", &unshallow,
176 N_("convert to a complete repository"),
177 1, PARSE_OPT_NONEG),
178 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
179 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
180 { OPTION_CALLBACK, 0, "recurse-submodules-default",
181 &recurse_submodules_default, N_("on-demand"),
182 N_("default for recursive fetching of submodules "
183 "(lower priority than config files)"),
184 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules },
185 OPT_BOOL(0, "update-shallow", &update_shallow,
186 N_("accept refs that update .git/shallow")),
187 { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"),
188 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg },
189 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
190 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
191 TRANSPORT_FAMILY_IPV4),
192 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
193 TRANSPORT_FAMILY_IPV6),
194 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
195 N_("report that we have only objects reachable from this object")),
196 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
197 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
198 N_("run 'gc --auto' after fetching")),
199 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
200 N_("check for forced-updates on all updated branches")),
201 OPT_END()
202 };
203
204 static void unlock_pack(void)
205 {
206 if (gtransport)
207 transport_unlock_pack(gtransport);
208 if (gsecondary)
209 transport_unlock_pack(gsecondary);
210 }
211
212 static void unlock_pack_on_signal(int signo)
213 {
214 unlock_pack();
215 sigchain_pop(signo);
216 raise(signo);
217 }
218
219 static void add_merge_config(struct ref **head,
220 const struct ref *remote_refs,
221 struct branch *branch,
222 struct ref ***tail)
223 {
224 int i;
225
226 for (i = 0; i < branch->merge_nr; i++) {
227 struct ref *rm, **old_tail = *tail;
228 struct refspec_item refspec;
229
230 for (rm = *head; rm; rm = rm->next) {
231 if (branch_merge_matches(branch, i, rm->name)) {
232 rm->fetch_head_status = FETCH_HEAD_MERGE;
233 break;
234 }
235 }
236 if (rm)
237 continue;
238
239 /*
240 * Not fetched to a remote-tracking branch? We need to fetch
241 * it anyway to allow this branch's "branch.$name.merge"
242 * to be honored by 'git pull', but we do not have to
243 * fail if branch.$name.merge is misconfigured to point
244 * at a nonexisting branch. If we were indeed called by
245 * 'git pull', it will notice the misconfiguration because
246 * there is no entry in the resulting FETCH_HEAD marked
247 * for merging.
248 */
249 memset(&refspec, 0, sizeof(refspec));
250 refspec.src = branch->merge[i]->src;
251 get_fetch_map(remote_refs, &refspec, tail, 1);
252 for (rm = *old_tail; rm; rm = rm->next)
253 rm->fetch_head_status = FETCH_HEAD_MERGE;
254 }
255 }
256
257 static void create_fetch_oidset(struct ref **head, struct oidset *out)
258 {
259 struct ref *rm = *head;
260 while (rm) {
261 oidset_insert(out, &rm->old_oid);
262 rm = rm->next;
263 }
264 }
265
266 struct refname_hash_entry {
267 struct hashmap_entry ent;
268 struct object_id oid;
269 int ignore;
270 char refname[FLEX_ARRAY];
271 };
272
273 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
274 const struct hashmap_entry *eptr,
275 const struct hashmap_entry *entry_or_key,
276 const void *keydata)
277 {
278 const struct refname_hash_entry *e1, *e2;
279
280 e1 = container_of(eptr, const struct refname_hash_entry, ent);
281 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
282 return strcmp(e1->refname, keydata ? keydata : e2->refname);
283 }
284
285 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
286 const char *refname,
287 const struct object_id *oid)
288 {
289 struct refname_hash_entry *ent;
290 size_t len = strlen(refname);
291
292 FLEX_ALLOC_MEM(ent, refname, refname, len);
293 hashmap_entry_init(&ent->ent, strhash(refname));
294 oidcpy(&ent->oid, oid);
295 hashmap_add(map, &ent->ent);
296 return ent;
297 }
298
299 static int add_one_refname(const char *refname,
300 const struct object_id *oid,
301 int flag, void *cbdata)
302 {
303 struct hashmap *refname_map = cbdata;
304
305 (void) refname_hash_add(refname_map, refname, oid);
306 return 0;
307 }
308
309 static void refname_hash_init(struct hashmap *map)
310 {
311 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
312 }
313
314 static int refname_hash_exists(struct hashmap *map, const char *refname)
315 {
316 return !!hashmap_get_from_hash(map, strhash(refname), refname);
317 }
318
319 static void clear_item(struct refname_hash_entry *item)
320 {
321 item->ignore = 1;
322 }
323
324 static void find_non_local_tags(const struct ref *refs,
325 struct ref **head,
326 struct ref ***tail)
327 {
328 struct hashmap existing_refs;
329 struct hashmap remote_refs;
330 struct oidset fetch_oids = OIDSET_INIT;
331 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
332 struct string_list_item *remote_ref_item;
333 const struct ref *ref;
334 struct refname_hash_entry *item = NULL;
335
336 refname_hash_init(&existing_refs);
337 refname_hash_init(&remote_refs);
338 create_fetch_oidset(head, &fetch_oids);
339
340 for_each_ref(add_one_refname, &existing_refs);
341 for (ref = refs; ref; ref = ref->next) {
342 if (!starts_with(ref->name, "refs/tags/"))
343 continue;
344
345 /*
346 * The peeled ref always follows the matching base
347 * ref, so if we see a peeled ref that we don't want
348 * to fetch then we can mark the ref entry in the list
349 * as one to ignore by setting util to NULL.
350 */
351 if (ends_with(ref->name, "^{}")) {
352 if (item &&
353 !has_object_file_with_flags(&ref->old_oid,
354 OBJECT_INFO_QUICK) &&
355 !oidset_contains(&fetch_oids, &ref->old_oid) &&
356 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
357 !oidset_contains(&fetch_oids, &item->oid))
358 clear_item(item);
359 item = NULL;
360 continue;
361 }
362
363 /*
364 * If item is non-NULL here, then we previously saw a
365 * ref not followed by a peeled reference, so we need
366 * to check if it is a lightweight tag that we want to
367 * fetch.
368 */
369 if (item &&
370 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
371 !oidset_contains(&fetch_oids, &item->oid))
372 clear_item(item);
373
374 item = NULL;
375
376 /* skip duplicates and refs that we already have */
377 if (refname_hash_exists(&remote_refs, ref->name) ||
378 refname_hash_exists(&existing_refs, ref->name))
379 continue;
380
381 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
382 string_list_insert(&remote_refs_list, ref->name);
383 }
384 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
385
386 /*
387 * We may have a final lightweight tag that needs to be
388 * checked to see if it needs fetching.
389 */
390 if (item &&
391 !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) &&
392 !oidset_contains(&fetch_oids, &item->oid))
393 clear_item(item);
394
395 /*
396 * For all the tags in the remote_refs_list,
397 * add them to the list of refs to be fetched
398 */
399 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
400 const char *refname = remote_ref_item->string;
401 struct ref *rm;
402 unsigned int hash = strhash(refname);
403
404 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
405 struct refname_hash_entry, ent);
406 if (!item)
407 BUG("unseen remote ref?");
408
409 /* Unless we have already decided to ignore this item... */
410 if (item->ignore)
411 continue;
412
413 rm = alloc_ref(item->refname);
414 rm->peer_ref = alloc_ref(item->refname);
415 oidcpy(&rm->old_oid, &item->oid);
416 **tail = rm;
417 *tail = &rm->next;
418 }
419 hashmap_free_entries(&remote_refs, struct refname_hash_entry, ent);
420 string_list_clear(&remote_refs_list, 0);
421 oidset_clear(&fetch_oids);
422 }
423
424 static struct ref *get_ref_map(struct remote *remote,
425 const struct ref *remote_refs,
426 struct refspec *rs,
427 int tags, int *autotags)
428 {
429 int i;
430 struct ref *rm;
431 struct ref *ref_map = NULL;
432 struct ref **tail = &ref_map;
433
434 /* opportunistically-updated references: */
435 struct ref *orefs = NULL, **oref_tail = &orefs;
436
437 struct hashmap existing_refs;
438
439 if (rs->nr) {
440 struct refspec *fetch_refspec;
441
442 for (i = 0; i < rs->nr; i++) {
443 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
444 if (rs->items[i].dst && rs->items[i].dst[0])
445 *autotags = 1;
446 }
447 /* Merge everything on the command line (but not --tags) */
448 for (rm = ref_map; rm; rm = rm->next)
449 rm->fetch_head_status = FETCH_HEAD_MERGE;
450
451 /*
452 * For any refs that we happen to be fetching via
453 * command-line arguments, the destination ref might
454 * have been missing or have been different than the
455 * remote-tracking ref that would be derived from the
456 * configured refspec. In these cases, we want to
457 * take the opportunity to update their configured
458 * remote-tracking reference. However, we do not want
459 * to mention these entries in FETCH_HEAD at all, as
460 * they would simply be duplicates of existing
461 * entries, so we set them FETCH_HEAD_IGNORE below.
462 *
463 * We compute these entries now, based only on the
464 * refspecs specified on the command line. But we add
465 * them to the list following the refspecs resulting
466 * from the tags option so that one of the latter,
467 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
468 * by ref_remove_duplicates() in favor of one of these
469 * opportunistic entries with FETCH_HEAD_IGNORE.
470 */
471 if (refmap.nr)
472 fetch_refspec = &refmap;
473 else
474 fetch_refspec = &remote->fetch;
475
476 for (i = 0; i < fetch_refspec->nr; i++)
477 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
478 } else if (refmap.nr) {
479 die("--refmap option is only meaningful with command-line refspec(s).");
480 } else {
481 /* Use the defaults */
482 struct branch *branch = branch_get(NULL);
483 int has_merge = branch_has_merge_config(branch);
484 if (remote &&
485 (remote->fetch.nr ||
486 /* Note: has_merge implies non-NULL branch->remote_name */
487 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
488 for (i = 0; i < remote->fetch.nr; i++) {
489 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
490 if (remote->fetch.items[i].dst &&
491 remote->fetch.items[i].dst[0])
492 *autotags = 1;
493 if (!i && !has_merge && ref_map &&
494 !remote->fetch.items[0].pattern)
495 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
496 }
497 /*
498 * if the remote we're fetching from is the same
499 * as given in branch.<name>.remote, we add the
500 * ref given in branch.<name>.merge, too.
501 *
502 * Note: has_merge implies non-NULL branch->remote_name
503 */
504 if (has_merge &&
505 !strcmp(branch->remote_name, remote->name))
506 add_merge_config(&ref_map, remote_refs, branch, &tail);
507 } else {
508 ref_map = get_remote_ref(remote_refs, "HEAD");
509 if (!ref_map)
510 die(_("Couldn't find remote ref HEAD"));
511 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
512 tail = &ref_map->next;
513 }
514 }
515
516 if (tags == TAGS_SET)
517 /* also fetch all tags */
518 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
519 else if (tags == TAGS_DEFAULT && *autotags)
520 find_non_local_tags(remote_refs, &ref_map, &tail);
521
522 /* Now append any refs to be updated opportunistically: */
523 *tail = orefs;
524 for (rm = orefs; rm; rm = rm->next) {
525 rm->fetch_head_status = FETCH_HEAD_IGNORE;
526 tail = &rm->next;
527 }
528
529 ref_map = ref_remove_duplicates(ref_map);
530
531 refname_hash_init(&existing_refs);
532 for_each_ref(add_one_refname, &existing_refs);
533
534 for (rm = ref_map; rm; rm = rm->next) {
535 if (rm->peer_ref) {
536 const char *refname = rm->peer_ref->name;
537 struct refname_hash_entry *peer_item;
538 unsigned int hash = strhash(refname);
539
540 peer_item = hashmap_get_entry_from_hash(&existing_refs,
541 hash, refname,
542 struct refname_hash_entry, ent);
543 if (peer_item) {
544 struct object_id *old_oid = &peer_item->oid;
545 oidcpy(&rm->peer_ref->old_oid, old_oid);
546 }
547 }
548 }
549 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
550
551 return ref_map;
552 }
553
554 #define STORE_REF_ERROR_OTHER 1
555 #define STORE_REF_ERROR_DF_CONFLICT 2
556
557 static int s_update_ref(const char *action,
558 struct ref *ref,
559 int check_old)
560 {
561 char *msg;
562 char *rla = getenv("GIT_REFLOG_ACTION");
563 struct ref_transaction *transaction;
564 struct strbuf err = STRBUF_INIT;
565 int ret, df_conflict = 0;
566
567 if (dry_run)
568 return 0;
569 if (!rla)
570 rla = default_rla.buf;
571 msg = xstrfmt("%s: %s", rla, action);
572
573 transaction = ref_transaction_begin(&err);
574 if (!transaction ||
575 ref_transaction_update(transaction, ref->name,
576 &ref->new_oid,
577 check_old ? &ref->old_oid : NULL,
578 0, msg, &err))
579 goto fail;
580
581 ret = ref_transaction_commit(transaction, &err);
582 if (ret) {
583 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
584 goto fail;
585 }
586
587 ref_transaction_free(transaction);
588 strbuf_release(&err);
589 free(msg);
590 return 0;
591 fail:
592 ref_transaction_free(transaction);
593 error("%s", err.buf);
594 strbuf_release(&err);
595 free(msg);
596 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
597 : STORE_REF_ERROR_OTHER;
598 }
599
600 static int refcol_width = 10;
601 static int compact_format;
602
603 static void adjust_refcol_width(const struct ref *ref)
604 {
605 int max, rlen, llen, len;
606
607 /* uptodate lines are only shown on high verbosity level */
608 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
609 return;
610
611 max = term_columns();
612 rlen = utf8_strwidth(prettify_refname(ref->name));
613
614 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
615
616 /*
617 * rough estimation to see if the output line is too long and
618 * should not be counted (we can't do precise calculation
619 * anyway because we don't know if the error explanation part
620 * will be printed in update_local_ref)
621 */
622 if (compact_format) {
623 llen = 0;
624 max = max * 2 / 3;
625 }
626 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
627 if (len >= max)
628 return;
629
630 /*
631 * Not precise calculation for compact mode because '*' can
632 * appear on the left hand side of '->' and shrink the column
633 * back.
634 */
635 if (refcol_width < rlen)
636 refcol_width = rlen;
637 }
638
639 static void prepare_format_display(struct ref *ref_map)
640 {
641 struct ref *rm;
642 const char *format = "full";
643
644 git_config_get_string_const("fetch.output", &format);
645 if (!strcasecmp(format, "full"))
646 compact_format = 0;
647 else if (!strcasecmp(format, "compact"))
648 compact_format = 1;
649 else
650 die(_("configuration fetch.output contains invalid value %s"),
651 format);
652
653 for (rm = ref_map; rm; rm = rm->next) {
654 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
655 !rm->peer_ref ||
656 !strcmp(rm->name, "HEAD"))
657 continue;
658
659 adjust_refcol_width(rm);
660 }
661 }
662
663 static void print_remote_to_local(struct strbuf *display,
664 const char *remote, const char *local)
665 {
666 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
667 }
668
669 static int find_and_replace(struct strbuf *haystack,
670 const char *needle,
671 const char *placeholder)
672 {
673 const char *p = NULL;
674 int plen, nlen;
675
676 nlen = strlen(needle);
677 if (ends_with(haystack->buf, needle))
678 p = haystack->buf + haystack->len - nlen;
679 else
680 p = strstr(haystack->buf, needle);
681 if (!p)
682 return 0;
683
684 if (p > haystack->buf && p[-1] != '/')
685 return 0;
686
687 plen = strlen(p);
688 if (plen > nlen && p[nlen] != '/')
689 return 0;
690
691 strbuf_splice(haystack, p - haystack->buf, nlen,
692 placeholder, strlen(placeholder));
693 return 1;
694 }
695
696 static void print_compact(struct strbuf *display,
697 const char *remote, const char *local)
698 {
699 struct strbuf r = STRBUF_INIT;
700 struct strbuf l = STRBUF_INIT;
701
702 if (!strcmp(remote, local)) {
703 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
704 return;
705 }
706
707 strbuf_addstr(&r, remote);
708 strbuf_addstr(&l, local);
709
710 if (!find_and_replace(&r, local, "*"))
711 find_and_replace(&l, remote, "*");
712 print_remote_to_local(display, r.buf, l.buf);
713
714 strbuf_release(&r);
715 strbuf_release(&l);
716 }
717
718 static void format_display(struct strbuf *display, char code,
719 const char *summary, const char *error,
720 const char *remote, const char *local,
721 int summary_width)
722 {
723 int width = (summary_width + strlen(summary) - gettext_width(summary));
724
725 strbuf_addf(display, "%c %-*s ", code, width, summary);
726 if (!compact_format)
727 print_remote_to_local(display, remote, local);
728 else
729 print_compact(display, remote, local);
730 if (error)
731 strbuf_addf(display, " (%s)", error);
732 }
733
734 static int update_local_ref(struct ref *ref,
735 const char *remote,
736 const struct ref *remote_ref,
737 struct strbuf *display,
738 int summary_width)
739 {
740 struct commit *current = NULL, *updated;
741 enum object_type type;
742 struct branch *current_branch = branch_get(NULL);
743 const char *pretty_ref = prettify_refname(ref->name);
744 int fast_forward = 0;
745
746 type = oid_object_info(the_repository, &ref->new_oid, NULL);
747 if (type < 0)
748 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
749
750 if (oideq(&ref->old_oid, &ref->new_oid)) {
751 if (verbosity > 0)
752 format_display(display, '=', _("[up to date]"), NULL,
753 remote, pretty_ref, summary_width);
754 return 0;
755 }
756
757 if (current_branch &&
758 !strcmp(ref->name, current_branch->name) &&
759 !(update_head_ok || is_bare_repository()) &&
760 !is_null_oid(&ref->old_oid)) {
761 /*
762 * If this is the head, and it's not okay to update
763 * the head, and the old value of the head isn't empty...
764 */
765 format_display(display, '!', _("[rejected]"),
766 _("can't fetch in current branch"),
767 remote, pretty_ref, summary_width);
768 return 1;
769 }
770
771 if (!is_null_oid(&ref->old_oid) &&
772 starts_with(ref->name, "refs/tags/")) {
773 if (force || ref->force) {
774 int r;
775 r = s_update_ref("updating tag", ref, 0);
776 format_display(display, r ? '!' : 't', _("[tag update]"),
777 r ? _("unable to update local ref") : NULL,
778 remote, pretty_ref, summary_width);
779 return r;
780 } else {
781 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
782 remote, pretty_ref, summary_width);
783 return 1;
784 }
785 }
786
787 current = lookup_commit_reference_gently(the_repository,
788 &ref->old_oid, 1);
789 updated = lookup_commit_reference_gently(the_repository,
790 &ref->new_oid, 1);
791 if (!current || !updated) {
792 const char *msg;
793 const char *what;
794 int r;
795 /*
796 * Nicely describe the new ref we're fetching.
797 * Base this on the remote's ref name, as it's
798 * more likely to follow a standard layout.
799 */
800 const char *name = remote_ref ? remote_ref->name : "";
801 if (starts_with(name, "refs/tags/")) {
802 msg = "storing tag";
803 what = _("[new tag]");
804 } else if (starts_with(name, "refs/heads/")) {
805 msg = "storing head";
806 what = _("[new branch]");
807 } else {
808 msg = "storing ref";
809 what = _("[new ref]");
810 }
811
812 r = s_update_ref(msg, ref, 0);
813 format_display(display, r ? '!' : '*', what,
814 r ? _("unable to update local ref") : NULL,
815 remote, pretty_ref, summary_width);
816 return r;
817 }
818
819 if (fetch_show_forced_updates) {
820 uint64_t t_before = getnanotime();
821 fast_forward = in_merge_bases(current, updated);
822 forced_updates_ms += (getnanotime() - t_before) / 1000000;
823 } else {
824 fast_forward = 1;
825 }
826
827 if (fast_forward) {
828 struct strbuf quickref = STRBUF_INIT;
829 int r;
830
831 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
832 strbuf_addstr(&quickref, "..");
833 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
834 r = s_update_ref("fast-forward", ref, 1);
835 format_display(display, r ? '!' : ' ', quickref.buf,
836 r ? _("unable to update local ref") : NULL,
837 remote, pretty_ref, summary_width);
838 strbuf_release(&quickref);
839 return r;
840 } else if (force || ref->force) {
841 struct strbuf quickref = STRBUF_INIT;
842 int r;
843 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
844 strbuf_addstr(&quickref, "...");
845 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
846 r = s_update_ref("forced-update", ref, 1);
847 format_display(display, r ? '!' : '+', quickref.buf,
848 r ? _("unable to update local ref") : _("forced update"),
849 remote, pretty_ref, summary_width);
850 strbuf_release(&quickref);
851 return r;
852 } else {
853 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
854 remote, pretty_ref, summary_width);
855 return 1;
856 }
857 }
858
859 static int iterate_ref_map(void *cb_data, struct object_id *oid)
860 {
861 struct ref **rm = cb_data;
862 struct ref *ref = *rm;
863
864 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
865 ref = ref->next;
866 if (!ref)
867 return -1; /* end of the list */
868 *rm = ref->next;
869 oidcpy(oid, &ref->old_oid);
870 return 0;
871 }
872
873 static const char warn_show_forced_updates[] =
874 N_("Fetch normally indicates which branches had a forced update,\n"
875 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
876 "flag or run 'git config fetch.showForcedUpdates true'.");
877 static const char warn_time_show_forced_updates[] =
878 N_("It took %.2f seconds to check forced updates. You can use\n"
879 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
880 " to avoid this check.\n");
881
882 static int store_updated_refs(const char *raw_url, const char *remote_name,
883 int connectivity_checked, struct ref *ref_map)
884 {
885 FILE *fp;
886 struct commit *commit;
887 int url_len, i, rc = 0;
888 struct strbuf note = STRBUF_INIT;
889 const char *what, *kind;
890 struct ref *rm;
891 char *url;
892 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
893 int want_status;
894 int summary_width = transport_summary_width(ref_map);
895
896 fp = fopen(filename, "a");
897 if (!fp)
898 return error_errno(_("cannot open %s"), filename);
899
900 if (raw_url)
901 url = transport_anonymize_url(raw_url);
902 else
903 url = xstrdup("foreign");
904
905 if (!connectivity_checked) {
906 rm = ref_map;
907 if (check_connected(iterate_ref_map, &rm, NULL)) {
908 rc = error(_("%s did not send all necessary objects\n"), url);
909 goto abort;
910 }
911 }
912
913 prepare_format_display(ref_map);
914
915 /*
916 * We do a pass for each fetch_head_status type in their enum order, so
917 * merged entries are written before not-for-merge. That lets readers
918 * use FETCH_HEAD as a refname to refer to the ref to be merged.
919 */
920 for (want_status = FETCH_HEAD_MERGE;
921 want_status <= FETCH_HEAD_IGNORE;
922 want_status++) {
923 for (rm = ref_map; rm; rm = rm->next) {
924 struct ref *ref = NULL;
925 const char *merge_status_marker = "";
926
927 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
928 if (want_status == FETCH_HEAD_MERGE)
929 warning(_("reject %s because shallow roots are not allowed to be updated"),
930 rm->peer_ref ? rm->peer_ref->name : rm->name);
931 continue;
932 }
933
934 commit = lookup_commit_reference_gently(the_repository,
935 &rm->old_oid,
936 1);
937 if (!commit)
938 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
939
940 if (rm->fetch_head_status != want_status)
941 continue;
942
943 if (rm->peer_ref) {
944 ref = alloc_ref(rm->peer_ref->name);
945 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
946 oidcpy(&ref->new_oid, &rm->old_oid);
947 ref->force = rm->peer_ref->force;
948 }
949
950 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
951 check_for_new_submodule_commits(&rm->old_oid);
952
953 if (!strcmp(rm->name, "HEAD")) {
954 kind = "";
955 what = "";
956 }
957 else if (starts_with(rm->name, "refs/heads/")) {
958 kind = "branch";
959 what = rm->name + 11;
960 }
961 else if (starts_with(rm->name, "refs/tags/")) {
962 kind = "tag";
963 what = rm->name + 10;
964 }
965 else if (starts_with(rm->name, "refs/remotes/")) {
966 kind = "remote-tracking branch";
967 what = rm->name + 13;
968 }
969 else {
970 kind = "";
971 what = rm->name;
972 }
973
974 url_len = strlen(url);
975 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
976 ;
977 url_len = i + 1;
978 if (4 < i && !strncmp(".git", url + i - 3, 4))
979 url_len = i - 3;
980
981 strbuf_reset(&note);
982 if (*what) {
983 if (*kind)
984 strbuf_addf(&note, "%s ", kind);
985 strbuf_addf(&note, "'%s' of ", what);
986 }
987 switch (rm->fetch_head_status) {
988 case FETCH_HEAD_NOT_FOR_MERGE:
989 merge_status_marker = "not-for-merge";
990 /* fall-through */
991 case FETCH_HEAD_MERGE:
992 fprintf(fp, "%s\t%s\t%s",
993 oid_to_hex(&rm->old_oid),
994 merge_status_marker,
995 note.buf);
996 for (i = 0; i < url_len; ++i)
997 if ('\n' == url[i])
998 fputs("\\n", fp);
999 else
1000 fputc(url[i], fp);
1001 fputc('\n', fp);
1002 break;
1003 default:
1004 /* do not write anything to FETCH_HEAD */
1005 break;
1006 }
1007
1008 strbuf_reset(&note);
1009 if (ref) {
1010 rc |= update_local_ref(ref, what, rm, &note,
1011 summary_width);
1012 free(ref);
1013 } else
1014 format_display(&note, '*',
1015 *kind ? kind : "branch", NULL,
1016 *what ? what : "HEAD",
1017 "FETCH_HEAD", summary_width);
1018 if (note.len) {
1019 if (verbosity >= 0 && !shown_url) {
1020 fprintf(stderr, _("From %.*s\n"),
1021 url_len, url);
1022 shown_url = 1;
1023 }
1024 if (verbosity >= 0)
1025 fprintf(stderr, " %s\n", note.buf);
1026 }
1027 }
1028 }
1029
1030 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1031 error(_("some local refs could not be updated; try running\n"
1032 " 'git remote prune %s' to remove any old, conflicting "
1033 "branches"), remote_name);
1034
1035 if (advice_fetch_show_forced_updates) {
1036 if (!fetch_show_forced_updates) {
1037 warning(_(warn_show_forced_updates));
1038 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1039 warning(_(warn_time_show_forced_updates),
1040 forced_updates_ms / 1000.0);
1041 }
1042 }
1043
1044 abort:
1045 strbuf_release(&note);
1046 free(url);
1047 fclose(fp);
1048 return rc;
1049 }
1050
1051 /*
1052 * We would want to bypass the object transfer altogether if
1053 * everything we are going to fetch already exists and is connected
1054 * locally.
1055 */
1056 static int check_exist_and_connected(struct ref *ref_map)
1057 {
1058 struct ref *rm = ref_map;
1059 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1060 struct ref *r;
1061
1062 /*
1063 * If we are deepening a shallow clone we already have these
1064 * objects reachable. Running rev-list here will return with
1065 * a good (0) exit status and we'll bypass the fetch that we
1066 * really need to perform. Claiming failure now will ensure
1067 * we perform the network exchange to deepen our history.
1068 */
1069 if (deepen)
1070 return -1;
1071
1072 /*
1073 * check_connected() allows objects to merely be promised, but
1074 * we need all direct targets to exist.
1075 */
1076 for (r = rm; r; r = r->next) {
1077 if (!has_object_file(&r->old_oid))
1078 return -1;
1079 }
1080
1081 opt.quiet = 1;
1082 return check_connected(iterate_ref_map, &rm, &opt);
1083 }
1084
1085 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1086 {
1087 int ret = check_exist_and_connected(ref_map);
1088 if (ret)
1089 ret = transport_fetch_refs(transport, ref_map);
1090 if (!ret)
1091 /*
1092 * Keep the new pack's ".keep" file around to allow the caller
1093 * time to update refs to reference the new objects.
1094 */
1095 return 0;
1096 transport_unlock_pack(transport);
1097 return ret;
1098 }
1099
1100 /* Update local refs based on the ref values fetched from a remote */
1101 static int consume_refs(struct transport *transport, struct ref *ref_map)
1102 {
1103 int connectivity_checked = transport->smart_options
1104 ? transport->smart_options->connectivity_checked : 0;
1105 int ret = store_updated_refs(transport->url,
1106 transport->remote->name,
1107 connectivity_checked,
1108 ref_map);
1109 transport_unlock_pack(transport);
1110 return ret;
1111 }
1112
1113 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1114 const char *raw_url)
1115 {
1116 int url_len, i, result = 0;
1117 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1118 char *url;
1119 int summary_width = transport_summary_width(stale_refs);
1120 const char *dangling_msg = dry_run
1121 ? _(" (%s will become dangling)")
1122 : _(" (%s has become dangling)");
1123
1124 if (raw_url)
1125 url = transport_anonymize_url(raw_url);
1126 else
1127 url = xstrdup("foreign");
1128
1129 url_len = strlen(url);
1130 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1131 ;
1132
1133 url_len = i + 1;
1134 if (4 < i && !strncmp(".git", url + i - 3, 4))
1135 url_len = i - 3;
1136
1137 if (!dry_run) {
1138 struct string_list refnames = STRING_LIST_INIT_NODUP;
1139
1140 for (ref = stale_refs; ref; ref = ref->next)
1141 string_list_append(&refnames, ref->name);
1142
1143 result = delete_refs("fetch: prune", &refnames, 0);
1144 string_list_clear(&refnames, 0);
1145 }
1146
1147 if (verbosity >= 0) {
1148 for (ref = stale_refs; ref; ref = ref->next) {
1149 struct strbuf sb = STRBUF_INIT;
1150 if (!shown_url) {
1151 fprintf(stderr, _("From %.*s\n"), url_len, url);
1152 shown_url = 1;
1153 }
1154 format_display(&sb, '-', _("[deleted]"), NULL,
1155 _("(none)"), prettify_refname(ref->name),
1156 summary_width);
1157 fprintf(stderr, " %s\n",sb.buf);
1158 strbuf_release(&sb);
1159 warn_dangling_symref(stderr, dangling_msg, ref->name);
1160 }
1161 }
1162
1163 free(url);
1164 free_refs(stale_refs);
1165 return result;
1166 }
1167
1168 static void check_not_current_branch(struct ref *ref_map)
1169 {
1170 struct branch *current_branch = branch_get(NULL);
1171
1172 if (is_bare_repository() || !current_branch)
1173 return;
1174
1175 for (; ref_map; ref_map = ref_map->next)
1176 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1177 ref_map->peer_ref->name))
1178 die(_("Refusing to fetch into current branch %s "
1179 "of non-bare repository"), current_branch->refname);
1180 }
1181
1182 static int truncate_fetch_head(void)
1183 {
1184 const char *filename = git_path_fetch_head(the_repository);
1185 FILE *fp = fopen_for_writing(filename);
1186
1187 if (!fp)
1188 return error_errno(_("cannot open %s"), filename);
1189 fclose(fp);
1190 return 0;
1191 }
1192
1193 static void set_option(struct transport *transport, const char *name, const char *value)
1194 {
1195 int r = transport_set_option(transport, name, value);
1196 if (r < 0)
1197 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1198 name, value, transport->url);
1199 if (r > 0)
1200 warning(_("Option \"%s\" is ignored for %s\n"),
1201 name, transport->url);
1202 }
1203
1204
1205 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1206 void *cb_data)
1207 {
1208 struct oid_array *oids = cb_data;
1209
1210 oid_array_append(oids, oid);
1211 return 0;
1212 }
1213
1214 static void add_negotiation_tips(struct git_transport_options *smart_options)
1215 {
1216 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1217 int i;
1218
1219 for (i = 0; i < negotiation_tip.nr; i++) {
1220 const char *s = negotiation_tip.items[i].string;
1221 int old_nr;
1222 if (!has_glob_specials(s)) {
1223 struct object_id oid;
1224 if (get_oid(s, &oid))
1225 die("%s is not a valid object", s);
1226 oid_array_append(oids, &oid);
1227 continue;
1228 }
1229 old_nr = oids->nr;
1230 for_each_glob_ref(add_oid, s, oids);
1231 if (old_nr == oids->nr)
1232 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1233 s);
1234 }
1235 smart_options->negotiation_tips = oids;
1236 }
1237
1238 static struct transport *prepare_transport(struct remote *remote, int deepen)
1239 {
1240 struct transport *transport;
1241
1242 transport = transport_get(remote, NULL);
1243 transport_set_verbosity(transport, verbosity, progress);
1244 transport->family = family;
1245 if (upload_pack)
1246 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1247 if (keep)
1248 set_option(transport, TRANS_OPT_KEEP, "yes");
1249 if (depth)
1250 set_option(transport, TRANS_OPT_DEPTH, depth);
1251 if (deepen && deepen_since)
1252 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1253 if (deepen && deepen_not.nr)
1254 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1255 (const char *)&deepen_not);
1256 if (deepen_relative)
1257 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1258 if (update_shallow)
1259 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1260 if (filter_options.choice) {
1261 const char *spec =
1262 expand_list_objects_filter_spec(&filter_options);
1263 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1264 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1265 }
1266 if (negotiation_tip.nr) {
1267 if (transport->smart_options)
1268 add_negotiation_tips(transport->smart_options);
1269 else
1270 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1271 }
1272 return transport;
1273 }
1274
1275 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1276 {
1277 int cannot_reuse;
1278
1279 /*
1280 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1281 * when remote helper is used (setting it to an empty string
1282 * is not unsetting). We could extend the remote helper
1283 * protocol for that, but for now, just force a new connection
1284 * without deepen-since. Similar story for deepen-not.
1285 */
1286 cannot_reuse = transport->cannot_reuse ||
1287 deepen_since || deepen_not.nr;
1288 if (cannot_reuse) {
1289 gsecondary = prepare_transport(transport->remote, 0);
1290 transport = gsecondary;
1291 }
1292
1293 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1294 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1295 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1296 if (!fetch_refs(transport, ref_map))
1297 consume_refs(transport, ref_map);
1298
1299 if (gsecondary) {
1300 transport_disconnect(gsecondary);
1301 gsecondary = NULL;
1302 }
1303 }
1304
1305 static int do_fetch(struct transport *transport,
1306 struct refspec *rs)
1307 {
1308 struct ref *ref_map;
1309 int autotags = (transport->remote->fetch_tags == 1);
1310 int retcode = 0;
1311 const struct ref *remote_refs;
1312 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1313 int must_list_refs = 1;
1314
1315 if (tags == TAGS_DEFAULT) {
1316 if (transport->remote->fetch_tags == 2)
1317 tags = TAGS_SET;
1318 if (transport->remote->fetch_tags == -1)
1319 tags = TAGS_UNSET;
1320 }
1321
1322 /* if not appending, truncate FETCH_HEAD */
1323 if (!append && !dry_run) {
1324 retcode = truncate_fetch_head();
1325 if (retcode)
1326 goto cleanup;
1327 }
1328
1329 if (rs->nr) {
1330 int i;
1331
1332 refspec_ref_prefixes(rs, &ref_prefixes);
1333
1334 /*
1335 * We can avoid listing refs if all of them are exact
1336 * OIDs
1337 */
1338 must_list_refs = 0;
1339 for (i = 0; i < rs->nr; i++) {
1340 if (!rs->items[i].exact_sha1) {
1341 must_list_refs = 1;
1342 break;
1343 }
1344 }
1345 } else if (transport->remote && transport->remote->fetch.nr)
1346 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1347
1348 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1349 must_list_refs = 1;
1350 if (ref_prefixes.argc)
1351 argv_array_push(&ref_prefixes, "refs/tags/");
1352 }
1353
1354 if (must_list_refs)
1355 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1356 else
1357 remote_refs = NULL;
1358
1359 argv_array_clear(&ref_prefixes);
1360
1361 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1362 tags, &autotags);
1363 if (!update_head_ok)
1364 check_not_current_branch(ref_map);
1365
1366 if (tags == TAGS_DEFAULT && autotags)
1367 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1368 if (prune) {
1369 /*
1370 * We only prune based on refspecs specified
1371 * explicitly (via command line or configuration); we
1372 * don't care whether --tags was specified.
1373 */
1374 if (rs->nr) {
1375 prune_refs(rs, ref_map, transport->url);
1376 } else {
1377 prune_refs(&transport->remote->fetch,
1378 ref_map,
1379 transport->url);
1380 }
1381 }
1382 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1383 free_refs(ref_map);
1384 retcode = 1;
1385 goto cleanup;
1386 }
1387
1388 if (set_upstream) {
1389 struct branch *branch = branch_get("HEAD");
1390 struct ref *rm;
1391 struct ref *source_ref = NULL;
1392
1393 /*
1394 * We're setting the upstream configuration for the
1395 * current branch. The relevent upstream is the
1396 * fetched branch that is meant to be merged with the
1397 * current one, i.e. the one fetched to FETCH_HEAD.
1398 *
1399 * When there are several such branches, consider the
1400 * request ambiguous and err on the safe side by doing
1401 * nothing and just emit a warning.
1402 */
1403 for (rm = ref_map; rm; rm = rm->next) {
1404 if (!rm->peer_ref) {
1405 if (source_ref) {
1406 warning(_("multiple branch detected, incompatible with --set-upstream"));
1407 goto skip;
1408 } else {
1409 source_ref = rm;
1410 }
1411 }
1412 }
1413 if (source_ref) {
1414 if (!strcmp(source_ref->name, "HEAD") ||
1415 starts_with(source_ref->name, "refs/heads/"))
1416 install_branch_config(0,
1417 branch->name,
1418 transport->remote->name,
1419 source_ref->name);
1420 else if (starts_with(source_ref->name, "refs/remotes/"))
1421 warning(_("not setting upstream for a remote remote-tracking branch"));
1422 else if (starts_with(source_ref->name, "refs/tags/"))
1423 warning(_("not setting upstream for a remote tag"));
1424 else
1425 warning(_("unknown branch type"));
1426 } else {
1427 warning(_("no source branch found.\n"
1428 "you need to specify exactly one branch with the --set-upstream option."));
1429 }
1430 }
1431 skip:
1432 free_refs(ref_map);
1433
1434 /* if neither --no-tags nor --tags was specified, do automated tag
1435 * following ... */
1436 if (tags == TAGS_DEFAULT && autotags) {
1437 struct ref **tail = &ref_map;
1438 ref_map = NULL;
1439 find_non_local_tags(remote_refs, &ref_map, &tail);
1440 if (ref_map)
1441 backfill_tags(transport, ref_map);
1442 free_refs(ref_map);
1443 }
1444
1445 cleanup:
1446 return retcode;
1447 }
1448
1449 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1450 {
1451 struct string_list *list = priv;
1452 if (!remote->skip_default_update)
1453 string_list_append(list, remote->name);
1454 return 0;
1455 }
1456
1457 struct remote_group_data {
1458 const char *name;
1459 struct string_list *list;
1460 };
1461
1462 static int get_remote_group(const char *key, const char *value, void *priv)
1463 {
1464 struct remote_group_data *g = priv;
1465
1466 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1467 /* split list by white space */
1468 while (*value) {
1469 size_t wordlen = strcspn(value, " \t\n");
1470
1471 if (wordlen >= 1)
1472 string_list_append_nodup(g->list,
1473 xstrndup(value, wordlen));
1474 value += wordlen + (value[wordlen] != '\0');
1475 }
1476 }
1477
1478 return 0;
1479 }
1480
1481 static int add_remote_or_group(const char *name, struct string_list *list)
1482 {
1483 int prev_nr = list->nr;
1484 struct remote_group_data g;
1485 g.name = name; g.list = list;
1486
1487 git_config(get_remote_group, &g);
1488 if (list->nr == prev_nr) {
1489 struct remote *remote = remote_get(name);
1490 if (!remote_is_configured(remote, 0))
1491 return 0;
1492 string_list_append(list, remote->name);
1493 }
1494 return 1;
1495 }
1496
1497 static void add_options_to_argv(struct argv_array *argv)
1498 {
1499 if (dry_run)
1500 argv_array_push(argv, "--dry-run");
1501 if (prune != -1)
1502 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1503 if (prune_tags != -1)
1504 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1505 if (update_head_ok)
1506 argv_array_push(argv, "--update-head-ok");
1507 if (force)
1508 argv_array_push(argv, "--force");
1509 if (keep)
1510 argv_array_push(argv, "--keep");
1511 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1512 argv_array_push(argv, "--recurse-submodules");
1513 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1514 argv_array_push(argv, "--recurse-submodules=on-demand");
1515 if (tags == TAGS_SET)
1516 argv_array_push(argv, "--tags");
1517 else if (tags == TAGS_UNSET)
1518 argv_array_push(argv, "--no-tags");
1519 if (verbosity >= 2)
1520 argv_array_push(argv, "-v");
1521 if (verbosity >= 1)
1522 argv_array_push(argv, "-v");
1523 else if (verbosity < 0)
1524 argv_array_push(argv, "-q");
1525
1526 }
1527
1528 /* Fetch multiple remotes in parallel */
1529
1530 struct parallel_fetch_state {
1531 const char **argv;
1532 struct string_list *remotes;
1533 int next, result;
1534 };
1535
1536 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1537 void *cb, void **task_cb)
1538 {
1539 struct parallel_fetch_state *state = cb;
1540 char *remote;
1541
1542 if (state->next < 0 || state->next >= state->remotes->nr)
1543 return 0;
1544
1545 remote = state->remotes->items[state->next++].string;
1546 *task_cb = remote;
1547
1548 argv_array_pushv(&cp->args, state->argv);
1549 argv_array_push(&cp->args, remote);
1550 cp->git_cmd = 1;
1551
1552 if (verbosity >= 0)
1553 printf(_("Fetching %s\n"), remote);
1554
1555 return 1;
1556 }
1557
1558 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1559 {
1560 struct parallel_fetch_state *state = cb;
1561 const char *remote = task_cb;
1562
1563 state->result = error(_("Could not fetch %s"), remote);
1564
1565 return 0;
1566 }
1567
1568 static int fetch_finished(int result, struct strbuf *out,
1569 void *cb, void *task_cb)
1570 {
1571 struct parallel_fetch_state *state = cb;
1572 const char *remote = task_cb;
1573
1574 if (result) {
1575 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1576 remote, result);
1577 state->result = -1;
1578 }
1579
1580 return 0;
1581 }
1582
1583 static int fetch_multiple(struct string_list *list, int max_children)
1584 {
1585 int i, result = 0;
1586 struct argv_array argv = ARGV_ARRAY_INIT;
1587
1588 if (!append && !dry_run) {
1589 int errcode = truncate_fetch_head();
1590 if (errcode)
1591 return errcode;
1592 }
1593
1594 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL);
1595 add_options_to_argv(&argv);
1596
1597 if (max_children != 1 && list->nr != 1) {
1598 struct parallel_fetch_state state = { argv.argv, list, 0, 0 };
1599
1600 argv_array_push(&argv, "--end-of-options");
1601 result = run_processes_parallel_tr2(max_children,
1602 &fetch_next_remote,
1603 &fetch_failed_to_start,
1604 &fetch_finished,
1605 &state,
1606 "fetch", "parallel/fetch");
1607
1608 if (!result)
1609 result = state.result;
1610 } else
1611 for (i = 0; i < list->nr; i++) {
1612 const char *name = list->items[i].string;
1613 argv_array_push(&argv, name);
1614 if (verbosity >= 0)
1615 printf(_("Fetching %s\n"), name);
1616 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1617 error(_("Could not fetch %s"), name);
1618 result = 1;
1619 }
1620 argv_array_pop(&argv);
1621 }
1622
1623 argv_array_clear(&argv);
1624 return !!result;
1625 }
1626
1627 /*
1628 * Fetching from the promisor remote should use the given filter-spec
1629 * or inherit the default filter-spec from the config.
1630 */
1631 static inline void fetch_one_setup_partial(struct remote *remote)
1632 {
1633 /*
1634 * Explicit --no-filter argument overrides everything, regardless
1635 * of any prior partial clones and fetches.
1636 */
1637 if (filter_options.no_filter)
1638 return;
1639
1640 /*
1641 * If no prior partial clone/fetch and the current fetch DID NOT
1642 * request a partial-fetch, do a normal fetch.
1643 */
1644 if (!has_promisor_remote() && !filter_options.choice)
1645 return;
1646
1647 /*
1648 * If this is a partial-fetch request, we enable partial on
1649 * this repo if not already enabled and remember the given
1650 * filter-spec as the default for subsequent fetches to this
1651 * remote.
1652 */
1653 if (filter_options.choice) {
1654 partial_clone_register(remote->name, &filter_options);
1655 return;
1656 }
1657
1658 /*
1659 * Do a partial-fetch from the promisor remote using either the
1660 * explicitly given filter-spec or inherit the filter-spec from
1661 * the config.
1662 */
1663 if (!filter_options.choice)
1664 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1665 return;
1666 }
1667
1668 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1669 {
1670 struct refspec rs = REFSPEC_INIT_FETCH;
1671 int i;
1672 int exit_code;
1673 int maybe_prune_tags;
1674 int remote_via_config = remote_is_configured(remote, 0);
1675
1676 if (!remote)
1677 die(_("No remote repository specified. Please, specify either a URL or a\n"
1678 "remote name from which new revisions should be fetched."));
1679
1680 gtransport = prepare_transport(remote, 1);
1681
1682 if (prune < 0) {
1683 /* no command line request */
1684 if (0 <= remote->prune)
1685 prune = remote->prune;
1686 else if (0 <= fetch_prune_config)
1687 prune = fetch_prune_config;
1688 else
1689 prune = PRUNE_BY_DEFAULT;
1690 }
1691
1692 if (prune_tags < 0) {
1693 /* no command line request */
1694 if (0 <= remote->prune_tags)
1695 prune_tags = remote->prune_tags;
1696 else if (0 <= fetch_prune_tags_config)
1697 prune_tags = fetch_prune_tags_config;
1698 else
1699 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1700 }
1701
1702 maybe_prune_tags = prune_tags_ok && prune_tags;
1703 if (maybe_prune_tags && remote_via_config)
1704 refspec_append(&remote->fetch, TAG_REFSPEC);
1705
1706 if (maybe_prune_tags && (argc || !remote_via_config))
1707 refspec_append(&rs, TAG_REFSPEC);
1708
1709 for (i = 0; i < argc; i++) {
1710 if (!strcmp(argv[i], "tag")) {
1711 char *tag;
1712 i++;
1713 if (i >= argc)
1714 die(_("You need to specify a tag name."));
1715
1716 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1717 argv[i], argv[i]);
1718 refspec_append(&rs, tag);
1719 free(tag);
1720 } else {
1721 refspec_append(&rs, argv[i]);
1722 }
1723 }
1724
1725 if (server_options.nr)
1726 gtransport->server_options = &server_options;
1727
1728 sigchain_push_common(unlock_pack_on_signal);
1729 atexit(unlock_pack);
1730 sigchain_push(SIGPIPE, SIG_IGN);
1731 exit_code = do_fetch(gtransport, &rs);
1732 sigchain_pop(SIGPIPE);
1733 refspec_clear(&rs);
1734 transport_disconnect(gtransport);
1735 gtransport = NULL;
1736 return exit_code;
1737 }
1738
1739 int cmd_fetch(int argc, const char **argv, const char *prefix)
1740 {
1741 int i;
1742 struct string_list list = STRING_LIST_INIT_DUP;
1743 struct remote *remote = NULL;
1744 int result = 0;
1745 int prune_tags_ok = 1;
1746 struct argv_array argv_gc_auto = ARGV_ARRAY_INIT;
1747
1748 packet_trace_identity("fetch");
1749
1750 fetch_if_missing = 0;
1751
1752 /* Record the command line for the reflog */
1753 strbuf_addstr(&default_rla, "fetch");
1754 for (i = 1; i < argc; i++)
1755 strbuf_addf(&default_rla, " %s", argv[i]);
1756
1757 fetch_config_from_gitmodules(&submodule_fetch_jobs_config,
1758 &recurse_submodules);
1759 git_config(git_fetch_config, NULL);
1760
1761 argc = parse_options(argc, argv, prefix,
1762 builtin_fetch_options, builtin_fetch_usage, 0);
1763
1764 if (deepen_relative) {
1765 if (deepen_relative < 0)
1766 die(_("Negative depth in --deepen is not supported"));
1767 if (depth)
1768 die(_("--deepen and --depth are mutually exclusive"));
1769 depth = xstrfmt("%d", deepen_relative);
1770 }
1771 if (unshallow) {
1772 if (depth)
1773 die(_("--depth and --unshallow cannot be used together"));
1774 else if (!is_repository_shallow(the_repository))
1775 die(_("--unshallow on a complete repository does not make sense"));
1776 else
1777 depth = xstrfmt("%d", INFINITE_DEPTH);
1778 }
1779
1780 /* no need to be strict, transport_set_option() will validate it again */
1781 if (depth && atoi(depth) < 1)
1782 die(_("depth %s is not a positive number"), depth);
1783 if (depth || deepen_since || deepen_not.nr)
1784 deepen = 1;
1785
1786 if (filter_options.choice && !has_promisor_remote())
1787 die("--filter can only be used when extensions.partialClone is set");
1788
1789 if (all) {
1790 if (argc == 1)
1791 die(_("fetch --all does not take a repository argument"));
1792 else if (argc > 1)
1793 die(_("fetch --all does not make sense with refspecs"));
1794 (void) for_each_remote(get_one_remote_for_fetch, &list);
1795 } else if (argc == 0) {
1796 /* No arguments -- use default remote */
1797 remote = remote_get(NULL);
1798 } else if (multiple) {
1799 /* All arguments are assumed to be remotes or groups */
1800 for (i = 0; i < argc; i++)
1801 if (!add_remote_or_group(argv[i], &list))
1802 die(_("No such remote or remote group: %s"), argv[i]);
1803 } else {
1804 /* Single remote or group */
1805 (void) add_remote_or_group(argv[0], &list);
1806 if (list.nr > 1) {
1807 /* More than one remote */
1808 if (argc > 1)
1809 die(_("Fetching a group and specifying refspecs does not make sense"));
1810 } else {
1811 /* Zero or one remotes */
1812 remote = remote_get(argv[0]);
1813 prune_tags_ok = (argc == 1);
1814 argc--;
1815 argv++;
1816 }
1817 }
1818
1819 if (remote) {
1820 if (filter_options.choice || has_promisor_remote())
1821 fetch_one_setup_partial(remote);
1822 result = fetch_one(remote, argc, argv, prune_tags_ok);
1823 } else {
1824 int max_children = max_jobs;
1825
1826 if (filter_options.choice)
1827 die(_("--filter can only be used with the remote "
1828 "configured in extensions.partialclone"));
1829
1830 if (max_children < 0)
1831 max_children = fetch_parallel_config;
1832
1833 /* TODO should this also die if we have a previous partial-clone? */
1834 result = fetch_multiple(&list, max_children);
1835 }
1836
1837 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1838 struct argv_array options = ARGV_ARRAY_INIT;
1839 int max_children = max_jobs;
1840
1841 if (max_children < 0)
1842 max_children = submodule_fetch_jobs_config;
1843 if (max_children < 0)
1844 max_children = fetch_parallel_config;
1845
1846 add_options_to_argv(&options);
1847 result = fetch_populated_submodules(the_repository,
1848 &options,
1849 submodule_prefix,
1850 recurse_submodules,
1851 recurse_submodules_default,
1852 verbosity < 0,
1853 max_children);
1854 argv_array_clear(&options);
1855 }
1856
1857 string_list_clear(&list, 0);
1858
1859 prepare_repo_settings(the_repository);
1860 if (the_repository->settings.fetch_write_commit_graph) {
1861 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
1862 struct split_commit_graph_opts split_opts;
1863 memset(&split_opts, 0, sizeof(struct split_commit_graph_opts));
1864
1865 if (progress)
1866 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
1867
1868 write_commit_graph_reachable(get_object_directory(),
1869 commit_graph_flags,
1870 &split_opts);
1871 }
1872
1873 close_object_store(the_repository->objects);
1874
1875 if (enable_auto_gc) {
1876 argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL);
1877 if (verbosity < 0)
1878 argv_array_push(&argv_gc_auto, "--quiet");
1879 run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD);
1880 argv_array_clear(&argv_gc_auto);
1881 }
1882
1883 return result;
1884 }
Unnamed repository; edit this file 'description' to name the repository.