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[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 "strvec.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 #include "shallow.h"
31
32 #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000)
33
34 static const char * const builtin_fetch_usage[] = {
35 N_("git fetch [<options>] [<repository> [<refspec>...]]"),
36 N_("git fetch [<options>] <group>"),
37 N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"),
38 N_("git fetch --all [<options>]"),
39 NULL
40 };
41
42 enum {
43 TAGS_UNSET = 0,
44 TAGS_DEFAULT = 1,
45 TAGS_SET = 2
46 };
47
48 static int fetch_prune_config = -1; /* unspecified */
49 static int fetch_show_forced_updates = 1;
50 static uint64_t forced_updates_ms = 0;
51 static int prune = -1; /* unspecified */
52 #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */
53
54 static int fetch_prune_tags_config = -1; /* unspecified */
55 static int prune_tags = -1; /* unspecified */
56 #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */
57
58 static int all, append, dry_run, force, keep, multiple, update_head_ok;
59 static int write_fetch_head = 1;
60 static int verbosity, deepen_relative, set_upstream;
61 static int progress = -1;
62 static int enable_auto_gc = 1;
63 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
64 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
65 static int fetch_parallel_config = 1;
66 static enum transport_family family;
67 static const char *depth;
68 static const char *deepen_since;
69 static const char *upload_pack;
70 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
71 static struct strbuf default_rla = STRBUF_INIT;
72 static struct transport *gtransport;
73 static struct transport *gsecondary;
74 static const char *submodule_prefix = "";
75 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
76 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
77 static int shown_url = 0;
78 static struct refspec refmap = REFSPEC_INIT_FETCH;
79 static struct list_objects_filter_options filter_options;
80 static struct string_list server_options = STRING_LIST_INIT_DUP;
81 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
82 static int fetch_write_commit_graph = -1;
83 static int stdin_refspecs = 0;
84
85 static int git_fetch_config(const char *k, const char *v, void *cb)
86 {
87 if (!strcmp(k, "fetch.prune")) {
88 fetch_prune_config = git_config_bool(k, v);
89 return 0;
90 }
91
92 if (!strcmp(k, "fetch.prunetags")) {
93 fetch_prune_tags_config = git_config_bool(k, v);
94 return 0;
95 }
96
97 if (!strcmp(k, "fetch.showforcedupdates")) {
98 fetch_show_forced_updates = git_config_bool(k, v);
99 return 0;
100 }
101
102 if (!strcmp(k, "submodule.recurse")) {
103 int r = git_config_bool(k, v) ?
104 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
105 recurse_submodules = r;
106 }
107
108 if (!strcmp(k, "submodule.fetchjobs")) {
109 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
110 return 0;
111 } else if (!strcmp(k, "fetch.recursesubmodules")) {
112 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
113 return 0;
114 }
115
116 if (!strcmp(k, "fetch.parallel")) {
117 fetch_parallel_config = git_config_int(k, v);
118 if (fetch_parallel_config < 0)
119 die(_("fetch.parallel cannot be negative"));
120 return 0;
121 }
122
123 return git_default_config(k, v, cb);
124 }
125
126 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
127 {
128 BUG_ON_OPT_NEG(unset);
129
130 /*
131 * "git fetch --refmap='' origin foo"
132 * can be used to tell the command not to store anywhere
133 */
134 refspec_append(&refmap, arg);
135
136 return 0;
137 }
138
139 static struct option builtin_fetch_options[] = {
140 OPT__VERBOSITY(&verbosity),
141 OPT_BOOL(0, "all", &all,
142 N_("fetch from all remotes")),
143 OPT_BOOL(0, "set-upstream", &set_upstream,
144 N_("set upstream for git pull/fetch")),
145 OPT_BOOL('a', "append", &append,
146 N_("append to .git/FETCH_HEAD instead of overwriting")),
147 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
148 N_("path to upload pack on remote end")),
149 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
150 OPT_BOOL('m', "multiple", &multiple,
151 N_("fetch from multiple remotes")),
152 OPT_SET_INT('t', "tags", &tags,
153 N_("fetch all tags and associated objects"), TAGS_SET),
154 OPT_SET_INT('n', NULL, &tags,
155 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
156 OPT_INTEGER('j', "jobs", &max_jobs,
157 N_("number of submodules fetched in parallel")),
158 OPT_BOOL('p', "prune", &prune,
159 N_("prune remote-tracking branches no longer on remote")),
160 OPT_BOOL('P', "prune-tags", &prune_tags,
161 N_("prune local tags no longer on remote and clobber changed tags")),
162 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
163 N_("control recursive fetching of submodules"),
164 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
165 OPT_BOOL(0, "dry-run", &dry_run,
166 N_("dry run")),
167 OPT_BOOL(0, "write-fetch-head", &write_fetch_head,
168 N_("write fetched references to the FETCH_HEAD file")),
169 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
170 OPT_BOOL('u', "update-head-ok", &update_head_ok,
171 N_("allow updating of HEAD ref")),
172 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
173 OPT_STRING(0, "depth", &depth, N_("depth"),
174 N_("deepen history of shallow clone")),
175 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
176 N_("deepen history of shallow repository based on time")),
177 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
178 N_("deepen history of shallow clone, excluding rev")),
179 OPT_INTEGER(0, "deepen", &deepen_relative,
180 N_("deepen history of shallow clone")),
181 OPT_SET_INT_F(0, "unshallow", &unshallow,
182 N_("convert to a complete repository"),
183 1, PARSE_OPT_NONEG),
184 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
185 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
186 OPT_CALLBACK_F(0, "recurse-submodules-default",
187 &recurse_submodules_default, N_("on-demand"),
188 N_("default for recursive fetching of submodules "
189 "(lower priority than config files)"),
190 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
191 OPT_BOOL(0, "update-shallow", &update_shallow,
192 N_("accept refs that update .git/shallow")),
193 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
194 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
195 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
196 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
197 TRANSPORT_FAMILY_IPV4),
198 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
199 TRANSPORT_FAMILY_IPV6),
200 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
201 N_("report that we have only objects reachable from this object")),
202 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
203 OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
204 N_("run 'maintenance --auto' after fetching")),
205 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
206 N_("run 'maintenance --auto' after fetching")),
207 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
208 N_("check for forced-updates on all updated branches")),
209 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
210 N_("write the commit-graph after fetching")),
211 OPT_BOOL(0, "stdin", &stdin_refspecs,
212 N_("accept refspecs from stdin")),
213 OPT_END()
214 };
215
216 static void unlock_pack(void)
217 {
218 if (gtransport)
219 transport_unlock_pack(gtransport);
220 if (gsecondary)
221 transport_unlock_pack(gsecondary);
222 }
223
224 static void unlock_pack_on_signal(int signo)
225 {
226 unlock_pack();
227 sigchain_pop(signo);
228 raise(signo);
229 }
230
231 static void add_merge_config(struct ref **head,
232 const struct ref *remote_refs,
233 struct branch *branch,
234 struct ref ***tail)
235 {
236 int i;
237
238 for (i = 0; i < branch->merge_nr; i++) {
239 struct ref *rm, **old_tail = *tail;
240 struct refspec_item refspec;
241
242 for (rm = *head; rm; rm = rm->next) {
243 if (branch_merge_matches(branch, i, rm->name)) {
244 rm->fetch_head_status = FETCH_HEAD_MERGE;
245 break;
246 }
247 }
248 if (rm)
249 continue;
250
251 /*
252 * Not fetched to a remote-tracking branch? We need to fetch
253 * it anyway to allow this branch's "branch.$name.merge"
254 * to be honored by 'git pull', but we do not have to
255 * fail if branch.$name.merge is misconfigured to point
256 * at a nonexisting branch. If we were indeed called by
257 * 'git pull', it will notice the misconfiguration because
258 * there is no entry in the resulting FETCH_HEAD marked
259 * for merging.
260 */
261 memset(&refspec, 0, sizeof(refspec));
262 refspec.src = branch->merge[i]->src;
263 get_fetch_map(remote_refs, &refspec, tail, 1);
264 for (rm = *old_tail; rm; rm = rm->next)
265 rm->fetch_head_status = FETCH_HEAD_MERGE;
266 }
267 }
268
269 static void create_fetch_oidset(struct ref **head, struct oidset *out)
270 {
271 struct ref *rm = *head;
272 while (rm) {
273 oidset_insert(out, &rm->old_oid);
274 rm = rm->next;
275 }
276 }
277
278 struct refname_hash_entry {
279 struct hashmap_entry ent;
280 struct object_id oid;
281 int ignore;
282 char refname[FLEX_ARRAY];
283 };
284
285 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
286 const struct hashmap_entry *eptr,
287 const struct hashmap_entry *entry_or_key,
288 const void *keydata)
289 {
290 const struct refname_hash_entry *e1, *e2;
291
292 e1 = container_of(eptr, const struct refname_hash_entry, ent);
293 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
294 return strcmp(e1->refname, keydata ? keydata : e2->refname);
295 }
296
297 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
298 const char *refname,
299 const struct object_id *oid)
300 {
301 struct refname_hash_entry *ent;
302 size_t len = strlen(refname);
303
304 FLEX_ALLOC_MEM(ent, refname, refname, len);
305 hashmap_entry_init(&ent->ent, strhash(refname));
306 oidcpy(&ent->oid, oid);
307 hashmap_add(map, &ent->ent);
308 return ent;
309 }
310
311 static int add_one_refname(const char *refname,
312 const struct object_id *oid,
313 int flag, void *cbdata)
314 {
315 struct hashmap *refname_map = cbdata;
316
317 (void) refname_hash_add(refname_map, refname, oid);
318 return 0;
319 }
320
321 static void refname_hash_init(struct hashmap *map)
322 {
323 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
324 }
325
326 static int refname_hash_exists(struct hashmap *map, const char *refname)
327 {
328 return !!hashmap_get_from_hash(map, strhash(refname), refname);
329 }
330
331 static void clear_item(struct refname_hash_entry *item)
332 {
333 item->ignore = 1;
334 }
335
336 static void find_non_local_tags(const struct ref *refs,
337 struct ref **head,
338 struct ref ***tail)
339 {
340 struct hashmap existing_refs;
341 struct hashmap remote_refs;
342 struct oidset fetch_oids = OIDSET_INIT;
343 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
344 struct string_list_item *remote_ref_item;
345 const struct ref *ref;
346 struct refname_hash_entry *item = NULL;
347 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
348
349 refname_hash_init(&existing_refs);
350 refname_hash_init(&remote_refs);
351 create_fetch_oidset(head, &fetch_oids);
352
353 for_each_ref(add_one_refname, &existing_refs);
354 for (ref = refs; ref; ref = ref->next) {
355 if (!starts_with(ref->name, "refs/tags/"))
356 continue;
357
358 /*
359 * The peeled ref always follows the matching base
360 * ref, so if we see a peeled ref that we don't want
361 * to fetch then we can mark the ref entry in the list
362 * as one to ignore by setting util to NULL.
363 */
364 if (ends_with(ref->name, "^{}")) {
365 if (item &&
366 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
367 !oidset_contains(&fetch_oids, &ref->old_oid) &&
368 !has_object_file_with_flags(&item->oid, quick_flags) &&
369 !oidset_contains(&fetch_oids, &item->oid))
370 clear_item(item);
371 item = NULL;
372 continue;
373 }
374
375 /*
376 * If item is non-NULL here, then we previously saw a
377 * ref not followed by a peeled reference, so we need
378 * to check if it is a lightweight tag that we want to
379 * fetch.
380 */
381 if (item &&
382 !has_object_file_with_flags(&item->oid, quick_flags) &&
383 !oidset_contains(&fetch_oids, &item->oid))
384 clear_item(item);
385
386 item = NULL;
387
388 /* skip duplicates and refs that we already have */
389 if (refname_hash_exists(&remote_refs, ref->name) ||
390 refname_hash_exists(&existing_refs, ref->name))
391 continue;
392
393 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
394 string_list_insert(&remote_refs_list, ref->name);
395 }
396 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
397
398 /*
399 * We may have a final lightweight tag that needs to be
400 * checked to see if it needs fetching.
401 */
402 if (item &&
403 !has_object_file_with_flags(&item->oid, quick_flags) &&
404 !oidset_contains(&fetch_oids, &item->oid))
405 clear_item(item);
406
407 /*
408 * For all the tags in the remote_refs_list,
409 * add them to the list of refs to be fetched
410 */
411 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
412 const char *refname = remote_ref_item->string;
413 struct ref *rm;
414 unsigned int hash = strhash(refname);
415
416 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
417 struct refname_hash_entry, ent);
418 if (!item)
419 BUG("unseen remote ref?");
420
421 /* Unless we have already decided to ignore this item... */
422 if (item->ignore)
423 continue;
424
425 rm = alloc_ref(item->refname);
426 rm->peer_ref = alloc_ref(item->refname);
427 oidcpy(&rm->old_oid, &item->oid);
428 **tail = rm;
429 *tail = &rm->next;
430 }
431 hashmap_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
432 string_list_clear(&remote_refs_list, 0);
433 oidset_clear(&fetch_oids);
434 }
435
436 static struct ref *get_ref_map(struct remote *remote,
437 const struct ref *remote_refs,
438 struct refspec *rs,
439 int tags, int *autotags)
440 {
441 int i;
442 struct ref *rm;
443 struct ref *ref_map = NULL;
444 struct ref **tail = &ref_map;
445
446 /* opportunistically-updated references: */
447 struct ref *orefs = NULL, **oref_tail = &orefs;
448
449 struct hashmap existing_refs;
450 int existing_refs_populated = 0;
451
452 if (rs->nr) {
453 struct refspec *fetch_refspec;
454
455 for (i = 0; i < rs->nr; i++) {
456 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
457 if (rs->items[i].dst && rs->items[i].dst[0])
458 *autotags = 1;
459 }
460 /* Merge everything on the command line (but not --tags) */
461 for (rm = ref_map; rm; rm = rm->next)
462 rm->fetch_head_status = FETCH_HEAD_MERGE;
463
464 /*
465 * For any refs that we happen to be fetching via
466 * command-line arguments, the destination ref might
467 * have been missing or have been different than the
468 * remote-tracking ref that would be derived from the
469 * configured refspec. In these cases, we want to
470 * take the opportunity to update their configured
471 * remote-tracking reference. However, we do not want
472 * to mention these entries in FETCH_HEAD at all, as
473 * they would simply be duplicates of existing
474 * entries, so we set them FETCH_HEAD_IGNORE below.
475 *
476 * We compute these entries now, based only on the
477 * refspecs specified on the command line. But we add
478 * them to the list following the refspecs resulting
479 * from the tags option so that one of the latter,
480 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
481 * by ref_remove_duplicates() in favor of one of these
482 * opportunistic entries with FETCH_HEAD_IGNORE.
483 */
484 if (refmap.nr)
485 fetch_refspec = &refmap;
486 else
487 fetch_refspec = &remote->fetch;
488
489 for (i = 0; i < fetch_refspec->nr; i++)
490 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
491 } else if (refmap.nr) {
492 die("--refmap option is only meaningful with command-line refspec(s).");
493 } else {
494 /* Use the defaults */
495 struct branch *branch = branch_get(NULL);
496 int has_merge = branch_has_merge_config(branch);
497 if (remote &&
498 (remote->fetch.nr ||
499 /* Note: has_merge implies non-NULL branch->remote_name */
500 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
501 for (i = 0; i < remote->fetch.nr; i++) {
502 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
503 if (remote->fetch.items[i].dst &&
504 remote->fetch.items[i].dst[0])
505 *autotags = 1;
506 if (!i && !has_merge && ref_map &&
507 !remote->fetch.items[0].pattern)
508 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
509 }
510 /*
511 * if the remote we're fetching from is the same
512 * as given in branch.<name>.remote, we add the
513 * ref given in branch.<name>.merge, too.
514 *
515 * Note: has_merge implies non-NULL branch->remote_name
516 */
517 if (has_merge &&
518 !strcmp(branch->remote_name, remote->name))
519 add_merge_config(&ref_map, remote_refs, branch, &tail);
520 } else {
521 ref_map = get_remote_ref(remote_refs, "HEAD");
522 if (!ref_map)
523 die(_("Couldn't find remote ref HEAD"));
524 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
525 tail = &ref_map->next;
526 }
527 }
528
529 if (tags == TAGS_SET)
530 /* also fetch all tags */
531 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
532 else if (tags == TAGS_DEFAULT && *autotags)
533 find_non_local_tags(remote_refs, &ref_map, &tail);
534
535 /* Now append any refs to be updated opportunistically: */
536 *tail = orefs;
537 for (rm = orefs; rm; rm = rm->next) {
538 rm->fetch_head_status = FETCH_HEAD_IGNORE;
539 tail = &rm->next;
540 }
541
542 /*
543 * apply negative refspecs first, before we remove duplicates. This is
544 * necessary as negative refspecs might remove an otherwise conflicting
545 * duplicate.
546 */
547 if (rs->nr)
548 ref_map = apply_negative_refspecs(ref_map, rs);
549 else
550 ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
551
552 ref_map = ref_remove_duplicates(ref_map);
553
554 for (rm = ref_map; rm; rm = rm->next) {
555 if (rm->peer_ref) {
556 const char *refname = rm->peer_ref->name;
557 struct refname_hash_entry *peer_item;
558 unsigned int hash = strhash(refname);
559
560 if (!existing_refs_populated) {
561 refname_hash_init(&existing_refs);
562 for_each_ref(add_one_refname, &existing_refs);
563 existing_refs_populated = 1;
564 }
565
566 peer_item = hashmap_get_entry_from_hash(&existing_refs,
567 hash, refname,
568 struct refname_hash_entry, ent);
569 if (peer_item) {
570 struct object_id *old_oid = &peer_item->oid;
571 oidcpy(&rm->peer_ref->old_oid, old_oid);
572 }
573 }
574 }
575 if (existing_refs_populated)
576 hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
577
578 return ref_map;
579 }
580
581 #define STORE_REF_ERROR_OTHER 1
582 #define STORE_REF_ERROR_DF_CONFLICT 2
583
584 static int s_update_ref(const char *action,
585 struct ref *ref,
586 int check_old)
587 {
588 char *msg;
589 char *rla = getenv("GIT_REFLOG_ACTION");
590 struct ref_transaction *transaction;
591 struct strbuf err = STRBUF_INIT;
592 int ret, df_conflict = 0;
593
594 if (dry_run)
595 return 0;
596 if (!rla)
597 rla = default_rla.buf;
598 msg = xstrfmt("%s: %s", rla, action);
599
600 transaction = ref_transaction_begin(&err);
601 if (!transaction ||
602 ref_transaction_update(transaction, ref->name,
603 &ref->new_oid,
604 check_old ? &ref->old_oid : NULL,
605 0, msg, &err))
606 goto fail;
607
608 ret = ref_transaction_commit(transaction, &err);
609 if (ret) {
610 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
611 goto fail;
612 }
613
614 ref_transaction_free(transaction);
615 strbuf_release(&err);
616 free(msg);
617 return 0;
618 fail:
619 ref_transaction_free(transaction);
620 error("%s", err.buf);
621 strbuf_release(&err);
622 free(msg);
623 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
624 : STORE_REF_ERROR_OTHER;
625 }
626
627 static int refcol_width = 10;
628 static int compact_format;
629
630 static void adjust_refcol_width(const struct ref *ref)
631 {
632 int max, rlen, llen, len;
633
634 /* uptodate lines are only shown on high verbosity level */
635 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
636 return;
637
638 max = term_columns();
639 rlen = utf8_strwidth(prettify_refname(ref->name));
640
641 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
642
643 /*
644 * rough estimation to see if the output line is too long and
645 * should not be counted (we can't do precise calculation
646 * anyway because we don't know if the error explanation part
647 * will be printed in update_local_ref)
648 */
649 if (compact_format) {
650 llen = 0;
651 max = max * 2 / 3;
652 }
653 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
654 if (len >= max)
655 return;
656
657 /*
658 * Not precise calculation for compact mode because '*' can
659 * appear on the left hand side of '->' and shrink the column
660 * back.
661 */
662 if (refcol_width < rlen)
663 refcol_width = rlen;
664 }
665
666 static void prepare_format_display(struct ref *ref_map)
667 {
668 struct ref *rm;
669 const char *format = "full";
670
671 git_config_get_string_tmp("fetch.output", &format);
672 if (!strcasecmp(format, "full"))
673 compact_format = 0;
674 else if (!strcasecmp(format, "compact"))
675 compact_format = 1;
676 else
677 die(_("configuration fetch.output contains invalid value %s"),
678 format);
679
680 for (rm = ref_map; rm; rm = rm->next) {
681 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
682 !rm->peer_ref ||
683 !strcmp(rm->name, "HEAD"))
684 continue;
685
686 adjust_refcol_width(rm);
687 }
688 }
689
690 static void print_remote_to_local(struct strbuf *display,
691 const char *remote, const char *local)
692 {
693 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
694 }
695
696 static int find_and_replace(struct strbuf *haystack,
697 const char *needle,
698 const char *placeholder)
699 {
700 const char *p = NULL;
701 int plen, nlen;
702
703 nlen = strlen(needle);
704 if (ends_with(haystack->buf, needle))
705 p = haystack->buf + haystack->len - nlen;
706 else
707 p = strstr(haystack->buf, needle);
708 if (!p)
709 return 0;
710
711 if (p > haystack->buf && p[-1] != '/')
712 return 0;
713
714 plen = strlen(p);
715 if (plen > nlen && p[nlen] != '/')
716 return 0;
717
718 strbuf_splice(haystack, p - haystack->buf, nlen,
719 placeholder, strlen(placeholder));
720 return 1;
721 }
722
723 static void print_compact(struct strbuf *display,
724 const char *remote, const char *local)
725 {
726 struct strbuf r = STRBUF_INIT;
727 struct strbuf l = STRBUF_INIT;
728
729 if (!strcmp(remote, local)) {
730 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
731 return;
732 }
733
734 strbuf_addstr(&r, remote);
735 strbuf_addstr(&l, local);
736
737 if (!find_and_replace(&r, local, "*"))
738 find_and_replace(&l, remote, "*");
739 print_remote_to_local(display, r.buf, l.buf);
740
741 strbuf_release(&r);
742 strbuf_release(&l);
743 }
744
745 static void format_display(struct strbuf *display, char code,
746 const char *summary, const char *error,
747 const char *remote, const char *local,
748 int summary_width)
749 {
750 int width = (summary_width + strlen(summary) - gettext_width(summary));
751
752 strbuf_addf(display, "%c %-*s ", code, width, summary);
753 if (!compact_format)
754 print_remote_to_local(display, remote, local);
755 else
756 print_compact(display, remote, local);
757 if (error)
758 strbuf_addf(display, " (%s)", error);
759 }
760
761 static int update_local_ref(struct ref *ref,
762 const char *remote,
763 const struct ref *remote_ref,
764 struct strbuf *display,
765 int summary_width)
766 {
767 struct commit *current = NULL, *updated;
768 enum object_type type;
769 struct branch *current_branch = branch_get(NULL);
770 const char *pretty_ref = prettify_refname(ref->name);
771 int fast_forward = 0;
772
773 type = oid_object_info(the_repository, &ref->new_oid, NULL);
774 if (type < 0)
775 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
776
777 if (oideq(&ref->old_oid, &ref->new_oid)) {
778 if (verbosity > 0)
779 format_display(display, '=', _("[up to date]"), NULL,
780 remote, pretty_ref, summary_width);
781 return 0;
782 }
783
784 if (current_branch &&
785 !strcmp(ref->name, current_branch->name) &&
786 !(update_head_ok || is_bare_repository()) &&
787 !is_null_oid(&ref->old_oid)) {
788 /*
789 * If this is the head, and it's not okay to update
790 * the head, and the old value of the head isn't empty...
791 */
792 format_display(display, '!', _("[rejected]"),
793 _("can't fetch in current branch"),
794 remote, pretty_ref, summary_width);
795 return 1;
796 }
797
798 if (!is_null_oid(&ref->old_oid) &&
799 starts_with(ref->name, "refs/tags/")) {
800 if (force || ref->force) {
801 int r;
802 r = s_update_ref("updating tag", ref, 0);
803 format_display(display, r ? '!' : 't', _("[tag update]"),
804 r ? _("unable to update local ref") : NULL,
805 remote, pretty_ref, summary_width);
806 return r;
807 } else {
808 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
809 remote, pretty_ref, summary_width);
810 return 1;
811 }
812 }
813
814 current = lookup_commit_reference_gently(the_repository,
815 &ref->old_oid, 1);
816 updated = lookup_commit_reference_gently(the_repository,
817 &ref->new_oid, 1);
818 if (!current || !updated) {
819 const char *msg;
820 const char *what;
821 int r;
822 /*
823 * Nicely describe the new ref we're fetching.
824 * Base this on the remote's ref name, as it's
825 * more likely to follow a standard layout.
826 */
827 const char *name = remote_ref ? remote_ref->name : "";
828 if (starts_with(name, "refs/tags/")) {
829 msg = "storing tag";
830 what = _("[new tag]");
831 } else if (starts_with(name, "refs/heads/")) {
832 msg = "storing head";
833 what = _("[new branch]");
834 } else {
835 msg = "storing ref";
836 what = _("[new ref]");
837 }
838
839 r = s_update_ref(msg, ref, 0);
840 format_display(display, r ? '!' : '*', what,
841 r ? _("unable to update local ref") : NULL,
842 remote, pretty_ref, summary_width);
843 return r;
844 }
845
846 if (fetch_show_forced_updates) {
847 uint64_t t_before = getnanotime();
848 fast_forward = in_merge_bases(current, updated);
849 forced_updates_ms += (getnanotime() - t_before) / 1000000;
850 } else {
851 fast_forward = 1;
852 }
853
854 if (fast_forward) {
855 struct strbuf quickref = STRBUF_INIT;
856 int r;
857
858 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
859 strbuf_addstr(&quickref, "..");
860 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
861 r = s_update_ref("fast-forward", ref, 1);
862 format_display(display, r ? '!' : ' ', quickref.buf,
863 r ? _("unable to update local ref") : NULL,
864 remote, pretty_ref, summary_width);
865 strbuf_release(&quickref);
866 return r;
867 } else if (force || ref->force) {
868 struct strbuf quickref = STRBUF_INIT;
869 int r;
870 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
871 strbuf_addstr(&quickref, "...");
872 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
873 r = s_update_ref("forced-update", ref, 1);
874 format_display(display, r ? '!' : '+', quickref.buf,
875 r ? _("unable to update local ref") : _("forced update"),
876 remote, pretty_ref, summary_width);
877 strbuf_release(&quickref);
878 return r;
879 } else {
880 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
881 remote, pretty_ref, summary_width);
882 return 1;
883 }
884 }
885
886 static int iterate_ref_map(void *cb_data, struct object_id *oid)
887 {
888 struct ref **rm = cb_data;
889 struct ref *ref = *rm;
890
891 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
892 ref = ref->next;
893 if (!ref)
894 return -1; /* end of the list */
895 *rm = ref->next;
896 oidcpy(oid, &ref->old_oid);
897 return 0;
898 }
899
900 static const char warn_show_forced_updates[] =
901 N_("Fetch normally indicates which branches had a forced update,\n"
902 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
903 "flag or run 'git config fetch.showForcedUpdates true'.");
904 static const char warn_time_show_forced_updates[] =
905 N_("It took %.2f seconds to check forced updates. You can use\n"
906 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
907 " to avoid this check.\n");
908
909 static int store_updated_refs(const char *raw_url, const char *remote_name,
910 int connectivity_checked, struct ref *ref_map)
911 {
912 FILE *fp;
913 struct commit *commit;
914 int url_len, i, rc = 0;
915 struct strbuf note = STRBUF_INIT;
916 const char *what, *kind;
917 struct ref *rm;
918 char *url;
919 const char *filename = (!write_fetch_head
920 ? "/dev/null"
921 : git_path_fetch_head(the_repository));
922 int want_status;
923 int summary_width = transport_summary_width(ref_map);
924
925 fp = fopen(filename, "a");
926 if (!fp)
927 return error_errno(_("cannot open %s"), filename);
928
929 if (raw_url)
930 url = transport_anonymize_url(raw_url);
931 else
932 url = xstrdup("foreign");
933
934 if (!connectivity_checked) {
935 struct check_connected_options opt = CHECK_CONNECTED_INIT;
936
937 rm = ref_map;
938 if (check_connected(iterate_ref_map, &rm, &opt)) {
939 rc = error(_("%s did not send all necessary objects\n"), url);
940 goto abort;
941 }
942 }
943
944 prepare_format_display(ref_map);
945
946 /*
947 * We do a pass for each fetch_head_status type in their enum order, so
948 * merged entries are written before not-for-merge. That lets readers
949 * use FETCH_HEAD as a refname to refer to the ref to be merged.
950 */
951 for (want_status = FETCH_HEAD_MERGE;
952 want_status <= FETCH_HEAD_IGNORE;
953 want_status++) {
954 for (rm = ref_map; rm; rm = rm->next) {
955 struct ref *ref = NULL;
956 const char *merge_status_marker = "";
957
958 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
959 if (want_status == FETCH_HEAD_MERGE)
960 warning(_("reject %s because shallow roots are not allowed to be updated"),
961 rm->peer_ref ? rm->peer_ref->name : rm->name);
962 continue;
963 }
964
965 commit = lookup_commit_reference_gently(the_repository,
966 &rm->old_oid,
967 1);
968 if (!commit)
969 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
970
971 if (rm->fetch_head_status != want_status)
972 continue;
973
974 if (rm->peer_ref) {
975 ref = alloc_ref(rm->peer_ref->name);
976 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
977 oidcpy(&ref->new_oid, &rm->old_oid);
978 ref->force = rm->peer_ref->force;
979 }
980
981 if (recurse_submodules != RECURSE_SUBMODULES_OFF &&
982 (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
983 check_for_new_submodule_commits(&rm->old_oid);
984 }
985
986 if (!strcmp(rm->name, "HEAD")) {
987 kind = "";
988 what = "";
989 }
990 else if (skip_prefix(rm->name, "refs/heads/", &what))
991 kind = "branch";
992 else if (skip_prefix(rm->name, "refs/tags/", &what))
993 kind = "tag";
994 else if (skip_prefix(rm->name, "refs/remotes/", &what))
995 kind = "remote-tracking branch";
996 else {
997 kind = "";
998 what = rm->name;
999 }
1000
1001 url_len = strlen(url);
1002 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1003 ;
1004 url_len = i + 1;
1005 if (4 < i && !strncmp(".git", url + i - 3, 4))
1006 url_len = i - 3;
1007
1008 strbuf_reset(&note);
1009 if (*what) {
1010 if (*kind)
1011 strbuf_addf(&note, "%s ", kind);
1012 strbuf_addf(&note, "'%s' of ", what);
1013 }
1014 switch (rm->fetch_head_status) {
1015 case FETCH_HEAD_NOT_FOR_MERGE:
1016 merge_status_marker = "not-for-merge";
1017 /* fall-through */
1018 case FETCH_HEAD_MERGE:
1019 fprintf(fp, "%s\t%s\t%s",
1020 oid_to_hex(&rm->old_oid),
1021 merge_status_marker,
1022 note.buf);
1023 for (i = 0; i < url_len; ++i)
1024 if ('\n' == url[i])
1025 fputs("\\n", fp);
1026 else
1027 fputc(url[i], fp);
1028 fputc('\n', fp);
1029 break;
1030 default:
1031 /* do not write anything to FETCH_HEAD */
1032 break;
1033 }
1034
1035 strbuf_reset(&note);
1036 if (ref) {
1037 rc |= update_local_ref(ref, what, rm, &note,
1038 summary_width);
1039 free(ref);
1040 } else if (write_fetch_head || dry_run) {
1041 /*
1042 * Display fetches written to FETCH_HEAD (or
1043 * would be written to FETCH_HEAD, if --dry-run
1044 * is set).
1045 */
1046 format_display(&note, '*',
1047 *kind ? kind : "branch", NULL,
1048 *what ? what : "HEAD",
1049 "FETCH_HEAD", summary_width);
1050 }
1051 if (note.len) {
1052 if (verbosity >= 0 && !shown_url) {
1053 fprintf(stderr, _("From %.*s\n"),
1054 url_len, url);
1055 shown_url = 1;
1056 }
1057 if (verbosity >= 0)
1058 fprintf(stderr, " %s\n", note.buf);
1059 }
1060 }
1061 }
1062
1063 if (rc & STORE_REF_ERROR_DF_CONFLICT)
1064 error(_("some local refs could not be updated; try running\n"
1065 " 'git remote prune %s' to remove any old, conflicting "
1066 "branches"), remote_name);
1067
1068 if (advice_fetch_show_forced_updates) {
1069 if (!fetch_show_forced_updates) {
1070 warning(_(warn_show_forced_updates));
1071 } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) {
1072 warning(_(warn_time_show_forced_updates),
1073 forced_updates_ms / 1000.0);
1074 }
1075 }
1076
1077 abort:
1078 strbuf_release(&note);
1079 free(url);
1080 fclose(fp);
1081 return rc;
1082 }
1083
1084 /*
1085 * We would want to bypass the object transfer altogether if
1086 * everything we are going to fetch already exists and is connected
1087 * locally.
1088 */
1089 static int check_exist_and_connected(struct ref *ref_map)
1090 {
1091 struct ref *rm = ref_map;
1092 struct check_connected_options opt = CHECK_CONNECTED_INIT;
1093 struct ref *r;
1094
1095 /*
1096 * If we are deepening a shallow clone we already have these
1097 * objects reachable. Running rev-list here will return with
1098 * a good (0) exit status and we'll bypass the fetch that we
1099 * really need to perform. Claiming failure now will ensure
1100 * we perform the network exchange to deepen our history.
1101 */
1102 if (deepen)
1103 return -1;
1104
1105 /*
1106 * check_connected() allows objects to merely be promised, but
1107 * we need all direct targets to exist.
1108 */
1109 for (r = rm; r; r = r->next) {
1110 if (!has_object_file_with_flags(&r->old_oid,
1111 OBJECT_INFO_SKIP_FETCH_OBJECT))
1112 return -1;
1113 }
1114
1115 opt.quiet = 1;
1116 return check_connected(iterate_ref_map, &rm, &opt);
1117 }
1118
1119 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1120 {
1121 int ret = check_exist_and_connected(ref_map);
1122 if (ret) {
1123 trace2_region_enter("fetch", "fetch_refs", the_repository);
1124 ret = transport_fetch_refs(transport, ref_map);
1125 trace2_region_leave("fetch", "fetch_refs", the_repository);
1126 }
1127 if (!ret)
1128 /*
1129 * Keep the new pack's ".keep" file around to allow the caller
1130 * time to update refs to reference the new objects.
1131 */
1132 return 0;
1133 transport_unlock_pack(transport);
1134 return ret;
1135 }
1136
1137 /* Update local refs based on the ref values fetched from a remote */
1138 static int consume_refs(struct transport *transport, struct ref *ref_map)
1139 {
1140 int connectivity_checked = transport->smart_options
1141 ? transport->smart_options->connectivity_checked : 0;
1142 int ret;
1143 trace2_region_enter("fetch", "consume_refs", the_repository);
1144 ret = store_updated_refs(transport->url,
1145 transport->remote->name,
1146 connectivity_checked,
1147 ref_map);
1148 transport_unlock_pack(transport);
1149 trace2_region_leave("fetch", "consume_refs", the_repository);
1150 return ret;
1151 }
1152
1153 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1154 const char *raw_url)
1155 {
1156 int url_len, i, result = 0;
1157 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1158 char *url;
1159 int summary_width = transport_summary_width(stale_refs);
1160 const char *dangling_msg = dry_run
1161 ? _(" (%s will become dangling)")
1162 : _(" (%s has become dangling)");
1163
1164 if (raw_url)
1165 url = transport_anonymize_url(raw_url);
1166 else
1167 url = xstrdup("foreign");
1168
1169 url_len = strlen(url);
1170 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1171 ;
1172
1173 url_len = i + 1;
1174 if (4 < i && !strncmp(".git", url + i - 3, 4))
1175 url_len = i - 3;
1176
1177 if (!dry_run) {
1178 struct string_list refnames = STRING_LIST_INIT_NODUP;
1179
1180 for (ref = stale_refs; ref; ref = ref->next)
1181 string_list_append(&refnames, ref->name);
1182
1183 result = delete_refs("fetch: prune", &refnames, 0);
1184 string_list_clear(&refnames, 0);
1185 }
1186
1187 if (verbosity >= 0) {
1188 for (ref = stale_refs; ref; ref = ref->next) {
1189 struct strbuf sb = STRBUF_INIT;
1190 if (!shown_url) {
1191 fprintf(stderr, _("From %.*s\n"), url_len, url);
1192 shown_url = 1;
1193 }
1194 format_display(&sb, '-', _("[deleted]"), NULL,
1195 _("(none)"), prettify_refname(ref->name),
1196 summary_width);
1197 fprintf(stderr, " %s\n",sb.buf);
1198 strbuf_release(&sb);
1199 warn_dangling_symref(stderr, dangling_msg, ref->name);
1200 }
1201 }
1202
1203 free(url);
1204 free_refs(stale_refs);
1205 return result;
1206 }
1207
1208 static void check_not_current_branch(struct ref *ref_map)
1209 {
1210 struct branch *current_branch = branch_get(NULL);
1211
1212 if (is_bare_repository() || !current_branch)
1213 return;
1214
1215 for (; ref_map; ref_map = ref_map->next)
1216 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1217 ref_map->peer_ref->name))
1218 die(_("Refusing to fetch into current branch %s "
1219 "of non-bare repository"), current_branch->refname);
1220 }
1221
1222 static int truncate_fetch_head(void)
1223 {
1224 const char *filename = git_path_fetch_head(the_repository);
1225 FILE *fp = fopen_for_writing(filename);
1226
1227 if (!fp)
1228 return error_errno(_("cannot open %s"), filename);
1229 fclose(fp);
1230 return 0;
1231 }
1232
1233 static void set_option(struct transport *transport, const char *name, const char *value)
1234 {
1235 int r = transport_set_option(transport, name, value);
1236 if (r < 0)
1237 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1238 name, value, transport->url);
1239 if (r > 0)
1240 warning(_("Option \"%s\" is ignored for %s\n"),
1241 name, transport->url);
1242 }
1243
1244
1245 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1246 void *cb_data)
1247 {
1248 struct oid_array *oids = cb_data;
1249
1250 oid_array_append(oids, oid);
1251 return 0;
1252 }
1253
1254 static void add_negotiation_tips(struct git_transport_options *smart_options)
1255 {
1256 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1257 int i;
1258
1259 for (i = 0; i < negotiation_tip.nr; i++) {
1260 const char *s = negotiation_tip.items[i].string;
1261 int old_nr;
1262 if (!has_glob_specials(s)) {
1263 struct object_id oid;
1264 if (get_oid(s, &oid))
1265 die("%s is not a valid object", s);
1266 oid_array_append(oids, &oid);
1267 continue;
1268 }
1269 old_nr = oids->nr;
1270 for_each_glob_ref(add_oid, s, oids);
1271 if (old_nr == oids->nr)
1272 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1273 s);
1274 }
1275 smart_options->negotiation_tips = oids;
1276 }
1277
1278 static struct transport *prepare_transport(struct remote *remote, int deepen)
1279 {
1280 struct transport *transport;
1281
1282 transport = transport_get(remote, NULL);
1283 transport_set_verbosity(transport, verbosity, progress);
1284 transport->family = family;
1285 if (upload_pack)
1286 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1287 if (keep)
1288 set_option(transport, TRANS_OPT_KEEP, "yes");
1289 if (depth)
1290 set_option(transport, TRANS_OPT_DEPTH, depth);
1291 if (deepen && deepen_since)
1292 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1293 if (deepen && deepen_not.nr)
1294 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1295 (const char *)&deepen_not);
1296 if (deepen_relative)
1297 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1298 if (update_shallow)
1299 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1300 if (filter_options.choice) {
1301 const char *spec =
1302 expand_list_objects_filter_spec(&filter_options);
1303 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1304 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1305 }
1306 if (negotiation_tip.nr) {
1307 if (transport->smart_options)
1308 add_negotiation_tips(transport->smart_options);
1309 else
1310 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1311 }
1312 return transport;
1313 }
1314
1315 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1316 {
1317 int cannot_reuse;
1318
1319 /*
1320 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1321 * when remote helper is used (setting it to an empty string
1322 * is not unsetting). We could extend the remote helper
1323 * protocol for that, but for now, just force a new connection
1324 * without deepen-since. Similar story for deepen-not.
1325 */
1326 cannot_reuse = transport->cannot_reuse ||
1327 deepen_since || deepen_not.nr;
1328 if (cannot_reuse) {
1329 gsecondary = prepare_transport(transport->remote, 0);
1330 transport = gsecondary;
1331 }
1332
1333 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1334 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1335 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1336 if (!fetch_refs(transport, ref_map))
1337 consume_refs(transport, ref_map);
1338
1339 if (gsecondary) {
1340 transport_disconnect(gsecondary);
1341 gsecondary = NULL;
1342 }
1343 }
1344
1345 static int do_fetch(struct transport *transport,
1346 struct refspec *rs)
1347 {
1348 struct ref *ref_map;
1349 int autotags = (transport->remote->fetch_tags == 1);
1350 int retcode = 0;
1351 const struct ref *remote_refs;
1352 struct strvec ref_prefixes = STRVEC_INIT;
1353 int must_list_refs = 1;
1354
1355 if (tags == TAGS_DEFAULT) {
1356 if (transport->remote->fetch_tags == 2)
1357 tags = TAGS_SET;
1358 if (transport->remote->fetch_tags == -1)
1359 tags = TAGS_UNSET;
1360 }
1361
1362 /* if not appending, truncate FETCH_HEAD */
1363 if (!append && write_fetch_head) {
1364 retcode = truncate_fetch_head();
1365 if (retcode)
1366 goto cleanup;
1367 }
1368
1369 if (rs->nr) {
1370 int i;
1371
1372 refspec_ref_prefixes(rs, &ref_prefixes);
1373
1374 /*
1375 * We can avoid listing refs if all of them are exact
1376 * OIDs
1377 */
1378 must_list_refs = 0;
1379 for (i = 0; i < rs->nr; i++) {
1380 if (!rs->items[i].exact_sha1) {
1381 must_list_refs = 1;
1382 break;
1383 }
1384 }
1385 } else if (transport->remote && transport->remote->fetch.nr)
1386 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1387
1388 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1389 must_list_refs = 1;
1390 if (ref_prefixes.nr)
1391 strvec_push(&ref_prefixes, "refs/tags/");
1392 }
1393
1394 if (must_list_refs) {
1395 trace2_region_enter("fetch", "remote_refs", the_repository);
1396 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1397 trace2_region_leave("fetch", "remote_refs", the_repository);
1398 } else
1399 remote_refs = NULL;
1400
1401 strvec_clear(&ref_prefixes);
1402
1403 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1404 tags, &autotags);
1405 if (!update_head_ok)
1406 check_not_current_branch(ref_map);
1407
1408 if (tags == TAGS_DEFAULT && autotags)
1409 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1410 if (prune) {
1411 /*
1412 * We only prune based on refspecs specified
1413 * explicitly (via command line or configuration); we
1414 * don't care whether --tags was specified.
1415 */
1416 if (rs->nr) {
1417 prune_refs(rs, ref_map, transport->url);
1418 } else {
1419 prune_refs(&transport->remote->fetch,
1420 ref_map,
1421 transport->url);
1422 }
1423 }
1424 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1425 free_refs(ref_map);
1426 retcode = 1;
1427 goto cleanup;
1428 }
1429
1430 if (set_upstream) {
1431 struct branch *branch = branch_get("HEAD");
1432 struct ref *rm;
1433 struct ref *source_ref = NULL;
1434
1435 /*
1436 * We're setting the upstream configuration for the
1437 * current branch. The relevant upstream is the
1438 * fetched branch that is meant to be merged with the
1439 * current one, i.e. the one fetched to FETCH_HEAD.
1440 *
1441 * When there are several such branches, consider the
1442 * request ambiguous and err on the safe side by doing
1443 * nothing and just emit a warning.
1444 */
1445 for (rm = ref_map; rm; rm = rm->next) {
1446 if (!rm->peer_ref) {
1447 if (source_ref) {
1448 warning(_("multiple branches detected, incompatible with --set-upstream"));
1449 goto skip;
1450 } else {
1451 source_ref = rm;
1452 }
1453 }
1454 }
1455 if (source_ref) {
1456 if (!strcmp(source_ref->name, "HEAD") ||
1457 starts_with(source_ref->name, "refs/heads/"))
1458 install_branch_config(0,
1459 branch->name,
1460 transport->remote->name,
1461 source_ref->name);
1462 else if (starts_with(source_ref->name, "refs/remotes/"))
1463 warning(_("not setting upstream for a remote remote-tracking branch"));
1464 else if (starts_with(source_ref->name, "refs/tags/"))
1465 warning(_("not setting upstream for a remote tag"));
1466 else
1467 warning(_("unknown branch type"));
1468 } else {
1469 warning(_("no source branch found.\n"
1470 "you need to specify exactly one branch with the --set-upstream option."));
1471 }
1472 }
1473 skip:
1474 free_refs(ref_map);
1475
1476 /* if neither --no-tags nor --tags was specified, do automated tag
1477 * following ... */
1478 if (tags == TAGS_DEFAULT && autotags) {
1479 struct ref **tail = &ref_map;
1480 ref_map = NULL;
1481 find_non_local_tags(remote_refs, &ref_map, &tail);
1482 if (ref_map)
1483 backfill_tags(transport, ref_map);
1484 free_refs(ref_map);
1485 }
1486
1487 cleanup:
1488 return retcode;
1489 }
1490
1491 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1492 {
1493 struct string_list *list = priv;
1494 if (!remote->skip_default_update)
1495 string_list_append(list, remote->name);
1496 return 0;
1497 }
1498
1499 struct remote_group_data {
1500 const char *name;
1501 struct string_list *list;
1502 };
1503
1504 static int get_remote_group(const char *key, const char *value, void *priv)
1505 {
1506 struct remote_group_data *g = priv;
1507
1508 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1509 /* split list by white space */
1510 while (*value) {
1511 size_t wordlen = strcspn(value, " \t\n");
1512
1513 if (wordlen >= 1)
1514 string_list_append_nodup(g->list,
1515 xstrndup(value, wordlen));
1516 value += wordlen + (value[wordlen] != '\0');
1517 }
1518 }
1519
1520 return 0;
1521 }
1522
1523 static int add_remote_or_group(const char *name, struct string_list *list)
1524 {
1525 int prev_nr = list->nr;
1526 struct remote_group_data g;
1527 g.name = name; g.list = list;
1528
1529 git_config(get_remote_group, &g);
1530 if (list->nr == prev_nr) {
1531 struct remote *remote = remote_get(name);
1532 if (!remote_is_configured(remote, 0))
1533 return 0;
1534 string_list_append(list, remote->name);
1535 }
1536 return 1;
1537 }
1538
1539 static void add_options_to_argv(struct strvec *argv)
1540 {
1541 if (dry_run)
1542 strvec_push(argv, "--dry-run");
1543 if (prune != -1)
1544 strvec_push(argv, prune ? "--prune" : "--no-prune");
1545 if (prune_tags != -1)
1546 strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1547 if (update_head_ok)
1548 strvec_push(argv, "--update-head-ok");
1549 if (force)
1550 strvec_push(argv, "--force");
1551 if (keep)
1552 strvec_push(argv, "--keep");
1553 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1554 strvec_push(argv, "--recurse-submodules");
1555 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1556 strvec_push(argv, "--recurse-submodules=on-demand");
1557 if (tags == TAGS_SET)
1558 strvec_push(argv, "--tags");
1559 else if (tags == TAGS_UNSET)
1560 strvec_push(argv, "--no-tags");
1561 if (verbosity >= 2)
1562 strvec_push(argv, "-v");
1563 if (verbosity >= 1)
1564 strvec_push(argv, "-v");
1565 else if (verbosity < 0)
1566 strvec_push(argv, "-q");
1567 if (family == TRANSPORT_FAMILY_IPV4)
1568 strvec_push(argv, "--ipv4");
1569 else if (family == TRANSPORT_FAMILY_IPV6)
1570 strvec_push(argv, "--ipv6");
1571 }
1572
1573 /* Fetch multiple remotes in parallel */
1574
1575 struct parallel_fetch_state {
1576 const char **argv;
1577 struct string_list *remotes;
1578 int next, result;
1579 };
1580
1581 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1582 void *cb, void **task_cb)
1583 {
1584 struct parallel_fetch_state *state = cb;
1585 char *remote;
1586
1587 if (state->next < 0 || state->next >= state->remotes->nr)
1588 return 0;
1589
1590 remote = state->remotes->items[state->next++].string;
1591 *task_cb = remote;
1592
1593 strvec_pushv(&cp->args, state->argv);
1594 strvec_push(&cp->args, remote);
1595 cp->git_cmd = 1;
1596
1597 if (verbosity >= 0)
1598 printf(_("Fetching %s\n"), remote);
1599
1600 return 1;
1601 }
1602
1603 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1604 {
1605 struct parallel_fetch_state *state = cb;
1606 const char *remote = task_cb;
1607
1608 state->result = error(_("Could not fetch %s"), remote);
1609
1610 return 0;
1611 }
1612
1613 static int fetch_finished(int result, struct strbuf *out,
1614 void *cb, void *task_cb)
1615 {
1616 struct parallel_fetch_state *state = cb;
1617 const char *remote = task_cb;
1618
1619 if (result) {
1620 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1621 remote, result);
1622 state->result = -1;
1623 }
1624
1625 return 0;
1626 }
1627
1628 static int fetch_multiple(struct string_list *list, int max_children)
1629 {
1630 int i, result = 0;
1631 struct strvec argv = STRVEC_INIT;
1632
1633 if (!append && write_fetch_head) {
1634 int errcode = truncate_fetch_head();
1635 if (errcode)
1636 return errcode;
1637 }
1638
1639 strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1640 "--no-write-commit-graph", NULL);
1641 add_options_to_argv(&argv);
1642
1643 if (max_children != 1 && list->nr != 1) {
1644 struct parallel_fetch_state state = { argv.v, list, 0, 0 };
1645
1646 strvec_push(&argv, "--end-of-options");
1647 result = run_processes_parallel_tr2(max_children,
1648 &fetch_next_remote,
1649 &fetch_failed_to_start,
1650 &fetch_finished,
1651 &state,
1652 "fetch", "parallel/fetch");
1653
1654 if (!result)
1655 result = state.result;
1656 } else
1657 for (i = 0; i < list->nr; i++) {
1658 const char *name = list->items[i].string;
1659 strvec_push(&argv, name);
1660 if (verbosity >= 0)
1661 printf(_("Fetching %s\n"), name);
1662 if (run_command_v_opt(argv.v, RUN_GIT_CMD)) {
1663 error(_("Could not fetch %s"), name);
1664 result = 1;
1665 }
1666 strvec_pop(&argv);
1667 }
1668
1669 strvec_clear(&argv);
1670 return !!result;
1671 }
1672
1673 /*
1674 * Fetching from the promisor remote should use the given filter-spec
1675 * or inherit the default filter-spec from the config.
1676 */
1677 static inline void fetch_one_setup_partial(struct remote *remote)
1678 {
1679 /*
1680 * Explicit --no-filter argument overrides everything, regardless
1681 * of any prior partial clones and fetches.
1682 */
1683 if (filter_options.no_filter)
1684 return;
1685
1686 /*
1687 * If no prior partial clone/fetch and the current fetch DID NOT
1688 * request a partial-fetch, do a normal fetch.
1689 */
1690 if (!has_promisor_remote() && !filter_options.choice)
1691 return;
1692
1693 /*
1694 * If this is a partial-fetch request, we enable partial on
1695 * this repo if not already enabled and remember the given
1696 * filter-spec as the default for subsequent fetches to this
1697 * remote if there is currently no default filter-spec.
1698 */
1699 if (filter_options.choice) {
1700 partial_clone_register(remote->name, &filter_options);
1701 return;
1702 }
1703
1704 /*
1705 * Do a partial-fetch from the promisor remote using either the
1706 * explicitly given filter-spec or inherit the filter-spec from
1707 * the config.
1708 */
1709 if (!filter_options.choice)
1710 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1711 return;
1712 }
1713
1714 static int fetch_one(struct remote *remote, int argc, const char **argv,
1715 int prune_tags_ok, int use_stdin_refspecs)
1716 {
1717 struct refspec rs = REFSPEC_INIT_FETCH;
1718 int i;
1719 int exit_code;
1720 int maybe_prune_tags;
1721 int remote_via_config = remote_is_configured(remote, 0);
1722
1723 if (!remote)
1724 die(_("No remote repository specified. Please, specify either a URL or a\n"
1725 "remote name from which new revisions should be fetched."));
1726
1727 gtransport = prepare_transport(remote, 1);
1728
1729 if (prune < 0) {
1730 /* no command line request */
1731 if (0 <= remote->prune)
1732 prune = remote->prune;
1733 else if (0 <= fetch_prune_config)
1734 prune = fetch_prune_config;
1735 else
1736 prune = PRUNE_BY_DEFAULT;
1737 }
1738
1739 if (prune_tags < 0) {
1740 /* no command line request */
1741 if (0 <= remote->prune_tags)
1742 prune_tags = remote->prune_tags;
1743 else if (0 <= fetch_prune_tags_config)
1744 prune_tags = fetch_prune_tags_config;
1745 else
1746 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1747 }
1748
1749 maybe_prune_tags = prune_tags_ok && prune_tags;
1750 if (maybe_prune_tags && remote_via_config)
1751 refspec_append(&remote->fetch, TAG_REFSPEC);
1752
1753 if (maybe_prune_tags && (argc || !remote_via_config))
1754 refspec_append(&rs, TAG_REFSPEC);
1755
1756 for (i = 0; i < argc; i++) {
1757 if (!strcmp(argv[i], "tag")) {
1758 i++;
1759 if (i >= argc)
1760 die(_("You need to specify a tag name."));
1761
1762 refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
1763 argv[i], argv[i]);
1764 } else {
1765 refspec_append(&rs, argv[i]);
1766 }
1767 }
1768
1769 if (use_stdin_refspecs) {
1770 struct strbuf line = STRBUF_INIT;
1771 while (strbuf_getline_lf(&line, stdin) != EOF)
1772 refspec_append(&rs, line.buf);
1773 strbuf_release(&line);
1774 }
1775
1776 if (server_options.nr)
1777 gtransport->server_options = &server_options;
1778
1779 sigchain_push_common(unlock_pack_on_signal);
1780 atexit(unlock_pack);
1781 sigchain_push(SIGPIPE, SIG_IGN);
1782 exit_code = do_fetch(gtransport, &rs);
1783 sigchain_pop(SIGPIPE);
1784 refspec_clear(&rs);
1785 transport_disconnect(gtransport);
1786 gtransport = NULL;
1787 return exit_code;
1788 }
1789
1790 int cmd_fetch(int argc, const char **argv, const char *prefix)
1791 {
1792 int i;
1793 struct string_list list = STRING_LIST_INIT_DUP;
1794 struct remote *remote = NULL;
1795 int result = 0;
1796 int prune_tags_ok = 1;
1797
1798 packet_trace_identity("fetch");
1799
1800 /* Record the command line for the reflog */
1801 strbuf_addstr(&default_rla, "fetch");
1802 for (i = 1; i < argc; i++) {
1803 /* This handles non-URLs gracefully */
1804 char *anon = transport_anonymize_url(argv[i]);
1805
1806 strbuf_addf(&default_rla, " %s", anon);
1807 free(anon);
1808 }
1809
1810 git_config(git_fetch_config, NULL);
1811
1812 argc = parse_options(argc, argv, prefix,
1813 builtin_fetch_options, builtin_fetch_usage, 0);
1814 if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
1815 int *sfjc = submodule_fetch_jobs_config == -1
1816 ? &submodule_fetch_jobs_config : NULL;
1817 int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
1818 ? &recurse_submodules : NULL;
1819
1820 fetch_config_from_gitmodules(sfjc, rs);
1821 }
1822
1823 if (deepen_relative) {
1824 if (deepen_relative < 0)
1825 die(_("Negative depth in --deepen is not supported"));
1826 if (depth)
1827 die(_("--deepen and --depth are mutually exclusive"));
1828 depth = xstrfmt("%d", deepen_relative);
1829 }
1830 if (unshallow) {
1831 if (depth)
1832 die(_("--depth and --unshallow cannot be used together"));
1833 else if (!is_repository_shallow(the_repository))
1834 die(_("--unshallow on a complete repository does not make sense"));
1835 else
1836 depth = xstrfmt("%d", INFINITE_DEPTH);
1837 }
1838
1839 /* no need to be strict, transport_set_option() will validate it again */
1840 if (depth && atoi(depth) < 1)
1841 die(_("depth %s is not a positive number"), depth);
1842 if (depth || deepen_since || deepen_not.nr)
1843 deepen = 1;
1844
1845 /* FETCH_HEAD never gets updated in --dry-run mode */
1846 if (dry_run)
1847 write_fetch_head = 0;
1848
1849 if (all) {
1850 if (argc == 1)
1851 die(_("fetch --all does not take a repository argument"));
1852 else if (argc > 1)
1853 die(_("fetch --all does not make sense with refspecs"));
1854 (void) for_each_remote(get_one_remote_for_fetch, &list);
1855 } else if (argc == 0) {
1856 /* No arguments -- use default remote */
1857 remote = remote_get(NULL);
1858 } else if (multiple) {
1859 /* All arguments are assumed to be remotes or groups */
1860 for (i = 0; i < argc; i++)
1861 if (!add_remote_or_group(argv[i], &list))
1862 die(_("No such remote or remote group: %s"), argv[i]);
1863 } else {
1864 /* Single remote or group */
1865 (void) add_remote_or_group(argv[0], &list);
1866 if (list.nr > 1) {
1867 /* More than one remote */
1868 if (argc > 1)
1869 die(_("Fetching a group and specifying refspecs does not make sense"));
1870 } else {
1871 /* Zero or one remotes */
1872 remote = remote_get(argv[0]);
1873 prune_tags_ok = (argc == 1);
1874 argc--;
1875 argv++;
1876 }
1877 }
1878
1879 if (remote) {
1880 if (filter_options.choice || has_promisor_remote())
1881 fetch_one_setup_partial(remote);
1882 result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
1883 } else {
1884 int max_children = max_jobs;
1885
1886 if (filter_options.choice)
1887 die(_("--filter can only be used with the remote "
1888 "configured in extensions.partialclone"));
1889
1890 if (stdin_refspecs)
1891 die(_("--stdin can only be used when fetching "
1892 "from one remote"));
1893
1894 if (max_children < 0)
1895 max_children = fetch_parallel_config;
1896
1897 /* TODO should this also die if we have a previous partial-clone? */
1898 result = fetch_multiple(&list, max_children);
1899 }
1900
1901 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1902 struct strvec options = STRVEC_INIT;
1903 int max_children = max_jobs;
1904
1905 if (max_children < 0)
1906 max_children = submodule_fetch_jobs_config;
1907 if (max_children < 0)
1908 max_children = fetch_parallel_config;
1909
1910 add_options_to_argv(&options);
1911 result = fetch_populated_submodules(the_repository,
1912 &options,
1913 submodule_prefix,
1914 recurse_submodules,
1915 recurse_submodules_default,
1916 verbosity < 0,
1917 max_children);
1918 strvec_clear(&options);
1919 }
1920
1921 string_list_clear(&list, 0);
1922
1923 prepare_repo_settings(the_repository);
1924 if (fetch_write_commit_graph > 0 ||
1925 (fetch_write_commit_graph < 0 &&
1926 the_repository->settings.fetch_write_commit_graph)) {
1927 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
1928
1929 if (progress)
1930 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
1931
1932 write_commit_graph_reachable(the_repository->objects->odb,
1933 commit_graph_flags,
1934 NULL);
1935 }
1936
1937 close_object_store(the_repository->objects);
1938
1939 if (enable_auto_gc)
1940 run_auto_maintenance(verbosity < 0);
1941
1942 return result;
1943 }
Unnamed repository; edit this file 'description' to name the repository.