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Merge branch 'es/trace-log-progress'
[git.git] / builtin / fetch.c
blobb5788c16bf43da12c81525498cf056a9b828962e
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 #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 verbosity, deepen_relative, set_upstream;
60 static int progress = -1;
61 static int enable_auto_gc = 1;
62 static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
63 static int max_jobs = -1, submodule_fetch_jobs_config = -1;
64 static int fetch_parallel_config = 1;
65 static enum transport_family family;
66 static const char *depth;
67 static const char *deepen_since;
68 static const char *upload_pack;
69 static struct string_list deepen_not = STRING_LIST_INIT_NODUP;
70 static struct strbuf default_rla = STRBUF_INIT;
71 static struct transport *gtransport;
72 static struct transport *gsecondary;
73 static const char *submodule_prefix = "";
74 static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT;
75 static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND;
76 static int shown_url = 0;
77 static struct refspec refmap = REFSPEC_INIT_FETCH;
78 static struct list_objects_filter_options filter_options;
79 static struct string_list server_options = STRING_LIST_INIT_DUP;
80 static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
81 static int fetch_write_commit_graph = -1;
82
83 static int git_fetch_config(const char *k, const char *v, void *cb)
84 {
85 if (!strcmp(k, "fetch.prune")) {
86 fetch_prune_config = git_config_bool(k, v);
87 return 0;
88 }
89
90 if (!strcmp(k, "fetch.prunetags")) {
91 fetch_prune_tags_config = git_config_bool(k, v);
92 return 0;
93 }
94
95 if (!strcmp(k, "fetch.showforcedupdates")) {
96 fetch_show_forced_updates = git_config_bool(k, v);
97 return 0;
98 }
99
100 if (!strcmp(k, "submodule.recurse")) {
101 int r = git_config_bool(k, v) ?
102 RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF;
103 recurse_submodules = r;
104 }
105
106 if (!strcmp(k, "submodule.fetchjobs")) {
107 submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
108 return 0;
109 } else if (!strcmp(k, "fetch.recursesubmodules")) {
110 recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
111 return 0;
112 }
113
114 if (!strcmp(k, "fetch.parallel")) {
115 fetch_parallel_config = git_config_int(k, v);
116 if (fetch_parallel_config < 0)
117 die(_("fetch.parallel cannot be negative"));
118 return 0;
119 }
120
121 return git_default_config(k, v, cb);
122 }
123
124 static int parse_refmap_arg(const struct option *opt, const char *arg, int unset)
125 {
126 BUG_ON_OPT_NEG(unset);
127
128 /*
129 * "git fetch --refmap='' origin foo"
130 * can be used to tell the command not to store anywhere
131 */
132 refspec_append(&refmap, arg);
133
134 return 0;
135 }
136
137 static struct option builtin_fetch_options[] = {
138 OPT__VERBOSITY(&verbosity),
139 OPT_BOOL(0, "all", &all,
140 N_("fetch from all remotes")),
141 OPT_BOOL(0, "set-upstream", &set_upstream,
142 N_("set upstream for git pull/fetch")),
143 OPT_BOOL('a', "append", &append,
144 N_("append to .git/FETCH_HEAD instead of overwriting")),
145 OPT_STRING(0, "upload-pack", &upload_pack, N_("path"),
146 N_("path to upload pack on remote end")),
147 OPT__FORCE(&force, N_("force overwrite of local reference"), 0),
148 OPT_BOOL('m', "multiple", &multiple,
149 N_("fetch from multiple remotes")),
150 OPT_SET_INT('t', "tags", &tags,
151 N_("fetch all tags and associated objects"), TAGS_SET),
152 OPT_SET_INT('n', NULL, &tags,
153 N_("do not fetch all tags (--no-tags)"), TAGS_UNSET),
154 OPT_INTEGER('j', "jobs", &max_jobs,
155 N_("number of submodules fetched in parallel")),
156 OPT_BOOL('p', "prune", &prune,
157 N_("prune remote-tracking branches no longer on remote")),
158 OPT_BOOL('P', "prune-tags", &prune_tags,
159 N_("prune local tags no longer on remote and clobber changed tags")),
160 OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules, N_("on-demand"),
161 N_("control recursive fetching of submodules"),
162 PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules),
163 OPT_BOOL(0, "dry-run", &dry_run,
164 N_("dry run")),
165 OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")),
166 OPT_BOOL('u', "update-head-ok", &update_head_ok,
167 N_("allow updating of HEAD ref")),
168 OPT_BOOL(0, "progress", &progress, N_("force progress reporting")),
169 OPT_STRING(0, "depth", &depth, N_("depth"),
170 N_("deepen history of shallow clone")),
171 OPT_STRING(0, "shallow-since", &deepen_since, N_("time"),
172 N_("deepen history of shallow repository based on time")),
173 OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"),
174 N_("deepen history of shallow clone, excluding rev")),
175 OPT_INTEGER(0, "deepen", &deepen_relative,
176 N_("deepen history of shallow clone")),
177 OPT_SET_INT_F(0, "unshallow", &unshallow,
178 N_("convert to a complete repository"),
179 1, PARSE_OPT_NONEG),
180 { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
181 N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
182 OPT_CALLBACK_F(0, "recurse-submodules-default",
183 &recurse_submodules_default, N_("on-demand"),
184 N_("default for recursive fetching of submodules "
185 "(lower priority than config files)"),
186 PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules),
187 OPT_BOOL(0, "update-shallow", &update_shallow,
188 N_("accept refs that update .git/shallow")),
189 OPT_CALLBACK_F(0, "refmap", NULL, N_("refmap"),
190 N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg),
191 OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")),
192 OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"),
193 TRANSPORT_FAMILY_IPV4),
194 OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"),
195 TRANSPORT_FAMILY_IPV6),
196 OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"),
197 N_("report that we have only objects reachable from this object")),
198 OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
199 OPT_BOOL(0, "auto-gc", &enable_auto_gc,
200 N_("run 'gc --auto' after fetching")),
201 OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
202 N_("check for forced-updates on all updated branches")),
203 OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
204 N_("write the commit-graph after fetching")),
205 OPT_END()
206 };
207
208 static void unlock_pack(void)
209 {
210 if (gtransport)
211 transport_unlock_pack(gtransport);
212 if (gsecondary)
213 transport_unlock_pack(gsecondary);
214 }
215
216 static void unlock_pack_on_signal(int signo)
217 {
218 unlock_pack();
219 sigchain_pop(signo);
220 raise(signo);
221 }
222
223 static void add_merge_config(struct ref **head,
224 const struct ref *remote_refs,
225 struct branch *branch,
226 struct ref ***tail)
227 {
228 int i;
229
230 for (i = 0; i < branch->merge_nr; i++) {
231 struct ref *rm, **old_tail = *tail;
232 struct refspec_item refspec;
233
234 for (rm = *head; rm; rm = rm->next) {
235 if (branch_merge_matches(branch, i, rm->name)) {
236 rm->fetch_head_status = FETCH_HEAD_MERGE;
237 break;
238 }
239 }
240 if (rm)
241 continue;
242
243 /*
244 * Not fetched to a remote-tracking branch? We need to fetch
245 * it anyway to allow this branch's "branch.$name.merge"
246 * to be honored by 'git pull', but we do not have to
247 * fail if branch.$name.merge is misconfigured to point
248 * at a nonexisting branch. If we were indeed called by
249 * 'git pull', it will notice the misconfiguration because
250 * there is no entry in the resulting FETCH_HEAD marked
251 * for merging.
252 */
253 memset(&refspec, 0, sizeof(refspec));
254 refspec.src = branch->merge[i]->src;
255 get_fetch_map(remote_refs, &refspec, tail, 1);
256 for (rm = *old_tail; rm; rm = rm->next)
257 rm->fetch_head_status = FETCH_HEAD_MERGE;
258 }
259 }
260
261 static void create_fetch_oidset(struct ref **head, struct oidset *out)
262 {
263 struct ref *rm = *head;
264 while (rm) {
265 oidset_insert(out, &rm->old_oid);
266 rm = rm->next;
267 }
268 }
269
270 struct refname_hash_entry {
271 struct hashmap_entry ent;
272 struct object_id oid;
273 int ignore;
274 char refname[FLEX_ARRAY];
275 };
276
277 static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data,
278 const struct hashmap_entry *eptr,
279 const struct hashmap_entry *entry_or_key,
280 const void *keydata)
281 {
282 const struct refname_hash_entry *e1, *e2;
283
284 e1 = container_of(eptr, const struct refname_hash_entry, ent);
285 e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
286 return strcmp(e1->refname, keydata ? keydata : e2->refname);
287 }
288
289 static struct refname_hash_entry *refname_hash_add(struct hashmap *map,
290 const char *refname,
291 const struct object_id *oid)
292 {
293 struct refname_hash_entry *ent;
294 size_t len = strlen(refname);
295
296 FLEX_ALLOC_MEM(ent, refname, refname, len);
297 hashmap_entry_init(&ent->ent, strhash(refname));
298 oidcpy(&ent->oid, oid);
299 hashmap_add(map, &ent->ent);
300 return ent;
301 }
302
303 static int add_one_refname(const char *refname,
304 const struct object_id *oid,
305 int flag, void *cbdata)
306 {
307 struct hashmap *refname_map = cbdata;
308
309 (void) refname_hash_add(refname_map, refname, oid);
310 return 0;
311 }
312
313 static void refname_hash_init(struct hashmap *map)
314 {
315 hashmap_init(map, refname_hash_entry_cmp, NULL, 0);
316 }
317
318 static int refname_hash_exists(struct hashmap *map, const char *refname)
319 {
320 return !!hashmap_get_from_hash(map, strhash(refname), refname);
321 }
322
323 static void clear_item(struct refname_hash_entry *item)
324 {
325 item->ignore = 1;
326 }
327
328 static void find_non_local_tags(const struct ref *refs,
329 struct ref **head,
330 struct ref ***tail)
331 {
332 struct hashmap existing_refs;
333 struct hashmap remote_refs;
334 struct oidset fetch_oids = OIDSET_INIT;
335 struct string_list remote_refs_list = STRING_LIST_INIT_NODUP;
336 struct string_list_item *remote_ref_item;
337 const struct ref *ref;
338 struct refname_hash_entry *item = NULL;
339 const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
340
341 refname_hash_init(&existing_refs);
342 refname_hash_init(&remote_refs);
343 create_fetch_oidset(head, &fetch_oids);
344
345 for_each_ref(add_one_refname, &existing_refs);
346 for (ref = refs; ref; ref = ref->next) {
347 if (!starts_with(ref->name, "refs/tags/"))
348 continue;
349
350 /*
351 * The peeled ref always follows the matching base
352 * ref, so if we see a peeled ref that we don't want
353 * to fetch then we can mark the ref entry in the list
354 * as one to ignore by setting util to NULL.
355 */
356 if (ends_with(ref->name, "^{}")) {
357 if (item &&
358 !has_object_file_with_flags(&ref->old_oid, quick_flags) &&
359 !oidset_contains(&fetch_oids, &ref->old_oid) &&
360 !has_object_file_with_flags(&item->oid, quick_flags) &&
361 !oidset_contains(&fetch_oids, &item->oid))
362 clear_item(item);
363 item = NULL;
364 continue;
365 }
366
367 /*
368 * If item is non-NULL here, then we previously saw a
369 * ref not followed by a peeled reference, so we need
370 * to check if it is a lightweight tag that we want to
371 * fetch.
372 */
373 if (item &&
374 !has_object_file_with_flags(&item->oid, quick_flags) &&
375 !oidset_contains(&fetch_oids, &item->oid))
376 clear_item(item);
377
378 item = NULL;
379
380 /* skip duplicates and refs that we already have */
381 if (refname_hash_exists(&remote_refs, ref->name) ||
382 refname_hash_exists(&existing_refs, ref->name))
383 continue;
384
385 item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid);
386 string_list_insert(&remote_refs_list, ref->name);
387 }
388 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
389
390 /*
391 * We may have a final lightweight tag that needs to be
392 * checked to see if it needs fetching.
393 */
394 if (item &&
395 !has_object_file_with_flags(&item->oid, quick_flags) &&
396 !oidset_contains(&fetch_oids, &item->oid))
397 clear_item(item);
398
399 /*
400 * For all the tags in the remote_refs_list,
401 * add them to the list of refs to be fetched
402 */
403 for_each_string_list_item(remote_ref_item, &remote_refs_list) {
404 const char *refname = remote_ref_item->string;
405 struct ref *rm;
406 unsigned int hash = strhash(refname);
407
408 item = hashmap_get_entry_from_hash(&remote_refs, hash, refname,
409 struct refname_hash_entry, ent);
410 if (!item)
411 BUG("unseen remote ref?");
412
413 /* Unless we have already decided to ignore this item... */
414 if (item->ignore)
415 continue;
416
417 rm = alloc_ref(item->refname);
418 rm->peer_ref = alloc_ref(item->refname);
419 oidcpy(&rm->old_oid, &item->oid);
420 **tail = rm;
421 *tail = &rm->next;
422 }
423 hashmap_free_entries(&remote_refs, struct refname_hash_entry, ent);
424 string_list_clear(&remote_refs_list, 0);
425 oidset_clear(&fetch_oids);
426 }
427
428 static struct ref *get_ref_map(struct remote *remote,
429 const struct ref *remote_refs,
430 struct refspec *rs,
431 int tags, int *autotags)
432 {
433 int i;
434 struct ref *rm;
435 struct ref *ref_map = NULL;
436 struct ref **tail = &ref_map;
437
438 /* opportunistically-updated references: */
439 struct ref *orefs = NULL, **oref_tail = &orefs;
440
441 struct hashmap existing_refs;
442
443 if (rs->nr) {
444 struct refspec *fetch_refspec;
445
446 for (i = 0; i < rs->nr; i++) {
447 get_fetch_map(remote_refs, &rs->items[i], &tail, 0);
448 if (rs->items[i].dst && rs->items[i].dst[0])
449 *autotags = 1;
450 }
451 /* Merge everything on the command line (but not --tags) */
452 for (rm = ref_map; rm; rm = rm->next)
453 rm->fetch_head_status = FETCH_HEAD_MERGE;
454
455 /*
456 * For any refs that we happen to be fetching via
457 * command-line arguments, the destination ref might
458 * have been missing or have been different than the
459 * remote-tracking ref that would be derived from the
460 * configured refspec. In these cases, we want to
461 * take the opportunity to update their configured
462 * remote-tracking reference. However, we do not want
463 * to mention these entries in FETCH_HEAD at all, as
464 * they would simply be duplicates of existing
465 * entries, so we set them FETCH_HEAD_IGNORE below.
466 *
467 * We compute these entries now, based only on the
468 * refspecs specified on the command line. But we add
469 * them to the list following the refspecs resulting
470 * from the tags option so that one of the latter,
471 * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed
472 * by ref_remove_duplicates() in favor of one of these
473 * opportunistic entries with FETCH_HEAD_IGNORE.
474 */
475 if (refmap.nr)
476 fetch_refspec = &refmap;
477 else
478 fetch_refspec = &remote->fetch;
479
480 for (i = 0; i < fetch_refspec->nr; i++)
481 get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1);
482 } else if (refmap.nr) {
483 die("--refmap option is only meaningful with command-line refspec(s).");
484 } else {
485 /* Use the defaults */
486 struct branch *branch = branch_get(NULL);
487 int has_merge = branch_has_merge_config(branch);
488 if (remote &&
489 (remote->fetch.nr ||
490 /* Note: has_merge implies non-NULL branch->remote_name */
491 (has_merge && !strcmp(branch->remote_name, remote->name)))) {
492 for (i = 0; i < remote->fetch.nr; i++) {
493 get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0);
494 if (remote->fetch.items[i].dst &&
495 remote->fetch.items[i].dst[0])
496 *autotags = 1;
497 if (!i && !has_merge && ref_map &&
498 !remote->fetch.items[0].pattern)
499 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
500 }
501 /*
502 * if the remote we're fetching from is the same
503 * as given in branch.<name>.remote, we add the
504 * ref given in branch.<name>.merge, too.
505 *
506 * Note: has_merge implies non-NULL branch->remote_name
507 */
508 if (has_merge &&
509 !strcmp(branch->remote_name, remote->name))
510 add_merge_config(&ref_map, remote_refs, branch, &tail);
511 } else {
512 ref_map = get_remote_ref(remote_refs, "HEAD");
513 if (!ref_map)
514 die(_("Couldn't find remote ref HEAD"));
515 ref_map->fetch_head_status = FETCH_HEAD_MERGE;
516 tail = &ref_map->next;
517 }
518 }
519
520 if (tags == TAGS_SET)
521 /* also fetch all tags */
522 get_fetch_map(remote_refs, tag_refspec, &tail, 0);
523 else if (tags == TAGS_DEFAULT && *autotags)
524 find_non_local_tags(remote_refs, &ref_map, &tail);
525
526 /* Now append any refs to be updated opportunistically: */
527 *tail = orefs;
528 for (rm = orefs; rm; rm = rm->next) {
529 rm->fetch_head_status = FETCH_HEAD_IGNORE;
530 tail = &rm->next;
531 }
532
533 ref_map = ref_remove_duplicates(ref_map);
534
535 refname_hash_init(&existing_refs);
536 for_each_ref(add_one_refname, &existing_refs);
537
538 for (rm = ref_map; rm; rm = rm->next) {
539 if (rm->peer_ref) {
540 const char *refname = rm->peer_ref->name;
541 struct refname_hash_entry *peer_item;
542 unsigned int hash = strhash(refname);
543
544 peer_item = hashmap_get_entry_from_hash(&existing_refs,
545 hash, refname,
546 struct refname_hash_entry, ent);
547 if (peer_item) {
548 struct object_id *old_oid = &peer_item->oid;
549 oidcpy(&rm->peer_ref->old_oid, old_oid);
550 }
551 }
552 }
553 hashmap_free_entries(&existing_refs, struct refname_hash_entry, ent);
554
555 return ref_map;
556 }
557
558 #define STORE_REF_ERROR_OTHER 1
559 #define STORE_REF_ERROR_DF_CONFLICT 2
560
561 static int s_update_ref(const char *action,
562 struct ref *ref,
563 int check_old)
564 {
565 char *msg;
566 char *rla = getenv("GIT_REFLOG_ACTION");
567 struct ref_transaction *transaction;
568 struct strbuf err = STRBUF_INIT;
569 int ret, df_conflict = 0;
570
571 if (dry_run)
572 return 0;
573 if (!rla)
574 rla = default_rla.buf;
575 msg = xstrfmt("%s: %s", rla, action);
576
577 transaction = ref_transaction_begin(&err);
578 if (!transaction ||
579 ref_transaction_update(transaction, ref->name,
580 &ref->new_oid,
581 check_old ? &ref->old_oid : NULL,
582 0, msg, &err))
583 goto fail;
584
585 ret = ref_transaction_commit(transaction, &err);
586 if (ret) {
587 df_conflict = (ret == TRANSACTION_NAME_CONFLICT);
588 goto fail;
589 }
590
591 ref_transaction_free(transaction);
592 strbuf_release(&err);
593 free(msg);
594 return 0;
595 fail:
596 ref_transaction_free(transaction);
597 error("%s", err.buf);
598 strbuf_release(&err);
599 free(msg);
600 return df_conflict ? STORE_REF_ERROR_DF_CONFLICT
601 : STORE_REF_ERROR_OTHER;
602 }
603
604 static int refcol_width = 10;
605 static int compact_format;
606
607 static void adjust_refcol_width(const struct ref *ref)
608 {
609 int max, rlen, llen, len;
610
611 /* uptodate lines are only shown on high verbosity level */
612 if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid))
613 return;
614
615 max = term_columns();
616 rlen = utf8_strwidth(prettify_refname(ref->name));
617
618 llen = utf8_strwidth(prettify_refname(ref->peer_ref->name));
619
620 /*
621 * rough estimation to see if the output line is too long and
622 * should not be counted (we can't do precise calculation
623 * anyway because we don't know if the error explanation part
624 * will be printed in update_local_ref)
625 */
626 if (compact_format) {
627 llen = 0;
628 max = max * 2 / 3;
629 }
630 len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen;
631 if (len >= max)
632 return;
633
634 /*
635 * Not precise calculation for compact mode because '*' can
636 * appear on the left hand side of '->' and shrink the column
637 * back.
638 */
639 if (refcol_width < rlen)
640 refcol_width = rlen;
641 }
642
643 static void prepare_format_display(struct ref *ref_map)
644 {
645 struct ref *rm;
646 const char *format = "full";
647
648 git_config_get_string_const("fetch.output", &format);
649 if (!strcasecmp(format, "full"))
650 compact_format = 0;
651 else if (!strcasecmp(format, "compact"))
652 compact_format = 1;
653 else
654 die(_("configuration fetch.output contains invalid value %s"),
655 format);
656
657 for (rm = ref_map; rm; rm = rm->next) {
658 if (rm->status == REF_STATUS_REJECT_SHALLOW ||
659 !rm->peer_ref ||
660 !strcmp(rm->name, "HEAD"))
661 continue;
662
663 adjust_refcol_width(rm);
664 }
665 }
666
667 static void print_remote_to_local(struct strbuf *display,
668 const char *remote, const char *local)
669 {
670 strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local);
671 }
672
673 static int find_and_replace(struct strbuf *haystack,
674 const char *needle,
675 const char *placeholder)
676 {
677 const char *p = NULL;
678 int plen, nlen;
679
680 nlen = strlen(needle);
681 if (ends_with(haystack->buf, needle))
682 p = haystack->buf + haystack->len - nlen;
683 else
684 p = strstr(haystack->buf, needle);
685 if (!p)
686 return 0;
687
688 if (p > haystack->buf && p[-1] != '/')
689 return 0;
690
691 plen = strlen(p);
692 if (plen > nlen && p[nlen] != '/')
693 return 0;
694
695 strbuf_splice(haystack, p - haystack->buf, nlen,
696 placeholder, strlen(placeholder));
697 return 1;
698 }
699
700 static void print_compact(struct strbuf *display,
701 const char *remote, const char *local)
702 {
703 struct strbuf r = STRBUF_INIT;
704 struct strbuf l = STRBUF_INIT;
705
706 if (!strcmp(remote, local)) {
707 strbuf_addf(display, "%-*s -> *", refcol_width, remote);
708 return;
709 }
710
711 strbuf_addstr(&r, remote);
712 strbuf_addstr(&l, local);
713
714 if (!find_and_replace(&r, local, "*"))
715 find_and_replace(&l, remote, "*");
716 print_remote_to_local(display, r.buf, l.buf);
717
718 strbuf_release(&r);
719 strbuf_release(&l);
720 }
721
722 static void format_display(struct strbuf *display, char code,
723 const char *summary, const char *error,
724 const char *remote, const char *local,
725 int summary_width)
726 {
727 int width = (summary_width + strlen(summary) - gettext_width(summary));
728
729 strbuf_addf(display, "%c %-*s ", code, width, summary);
730 if (!compact_format)
731 print_remote_to_local(display, remote, local);
732 else
733 print_compact(display, remote, local);
734 if (error)
735 strbuf_addf(display, " (%s)", error);
736 }
737
738 static int update_local_ref(struct ref *ref,
739 const char *remote,
740 const struct ref *remote_ref,
741 struct strbuf *display,
742 int summary_width)
743 {
744 struct commit *current = NULL, *updated;
745 enum object_type type;
746 struct branch *current_branch = branch_get(NULL);
747 const char *pretty_ref = prettify_refname(ref->name);
748 int fast_forward = 0;
749
750 type = oid_object_info(the_repository, &ref->new_oid, NULL);
751 if (type < 0)
752 die(_("object %s not found"), oid_to_hex(&ref->new_oid));
753
754 if (oideq(&ref->old_oid, &ref->new_oid)) {
755 if (verbosity > 0)
756 format_display(display, '=', _("[up to date]"), NULL,
757 remote, pretty_ref, summary_width);
758 return 0;
759 }
760
761 if (current_branch &&
762 !strcmp(ref->name, current_branch->name) &&
763 !(update_head_ok || is_bare_repository()) &&
764 !is_null_oid(&ref->old_oid)) {
765 /*
766 * If this is the head, and it's not okay to update
767 * the head, and the old value of the head isn't empty...
768 */
769 format_display(display, '!', _("[rejected]"),
770 _("can't fetch in current branch"),
771 remote, pretty_ref, summary_width);
772 return 1;
773 }
774
775 if (!is_null_oid(&ref->old_oid) &&
776 starts_with(ref->name, "refs/tags/")) {
777 if (force || ref->force) {
778 int r;
779 r = s_update_ref("updating tag", ref, 0);
780 format_display(display, r ? '!' : 't', _("[tag update]"),
781 r ? _("unable to update local ref") : NULL,
782 remote, pretty_ref, summary_width);
783 return r;
784 } else {
785 format_display(display, '!', _("[rejected]"), _("would clobber existing tag"),
786 remote, pretty_ref, summary_width);
787 return 1;
788 }
789 }
790
791 current = lookup_commit_reference_gently(the_repository,
792 &ref->old_oid, 1);
793 updated = lookup_commit_reference_gently(the_repository,
794 &ref->new_oid, 1);
795 if (!current || !updated) {
796 const char *msg;
797 const char *what;
798 int r;
799 /*
800 * Nicely describe the new ref we're fetching.
801 * Base this on the remote's ref name, as it's
802 * more likely to follow a standard layout.
803 */
804 const char *name = remote_ref ? remote_ref->name : "";
805 if (starts_with(name, "refs/tags/")) {
806 msg = "storing tag";
807 what = _("[new tag]");
808 } else if (starts_with(name, "refs/heads/")) {
809 msg = "storing head";
810 what = _("[new branch]");
811 } else {
812 msg = "storing ref";
813 what = _("[new ref]");
814 }
815
816 r = s_update_ref(msg, ref, 0);
817 format_display(display, r ? '!' : '*', what,
818 r ? _("unable to update local ref") : NULL,
819 remote, pretty_ref, summary_width);
820 return r;
821 }
822
823 if (fetch_show_forced_updates) {
824 uint64_t t_before = getnanotime();
825 fast_forward = in_merge_bases(current, updated);
826 forced_updates_ms += (getnanotime() - t_before) / 1000000;
827 } else {
828 fast_forward = 1;
829 }
830
831 if (fast_forward) {
832 struct strbuf quickref = STRBUF_INIT;
833 int r;
834
835 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
836 strbuf_addstr(&quickref, "..");
837 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
838 r = s_update_ref("fast-forward", ref, 1);
839 format_display(display, r ? '!' : ' ', quickref.buf,
840 r ? _("unable to update local ref") : NULL,
841 remote, pretty_ref, summary_width);
842 strbuf_release(&quickref);
843 return r;
844 } else if (force || ref->force) {
845 struct strbuf quickref = STRBUF_INIT;
846 int r;
847 strbuf_add_unique_abbrev(&quickref, &current->object.oid, DEFAULT_ABBREV);
848 strbuf_addstr(&quickref, "...");
849 strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
850 r = s_update_ref("forced-update", ref, 1);
851 format_display(display, r ? '!' : '+', quickref.buf,
852 r ? _("unable to update local ref") : _("forced update"),
853 remote, pretty_ref, summary_width);
854 strbuf_release(&quickref);
855 return r;
856 } else {
857 format_display(display, '!', _("[rejected]"), _("non-fast-forward"),
858 remote, pretty_ref, summary_width);
859 return 1;
860 }
861 }
862
863 static int iterate_ref_map(void *cb_data, struct object_id *oid)
864 {
865 struct ref **rm = cb_data;
866 struct ref *ref = *rm;
867
868 while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
869 ref = ref->next;
870 if (!ref)
871 return -1; /* end of the list */
872 *rm = ref->next;
873 oidcpy(oid, &ref->old_oid);
874 return 0;
875 }
876
877 static const char warn_show_forced_updates[] =
878 N_("Fetch normally indicates which branches had a forced update,\n"
879 "but that check has been disabled. To re-enable, use '--show-forced-updates'\n"
880 "flag or run 'git config fetch.showForcedUpdates true'.");
881 static const char warn_time_show_forced_updates[] =
882 N_("It took %.2f seconds to check forced updates. You can use\n"
883 "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n"
884 " to avoid this check.\n");
885
886 static int store_updated_refs(const char *raw_url, const char *remote_name,
887 int connectivity_checked, struct ref *ref_map)
888 {
889 FILE *fp;
890 struct commit *commit;
891 int url_len, i, rc = 0;
892 struct strbuf note = STRBUF_INIT;
893 const char *what, *kind;
894 struct ref *rm;
895 char *url;
896 const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository);
897 int want_status;
898 int summary_width = transport_summary_width(ref_map);
899
900 fp = fopen(filename, "a");
901 if (!fp)
902 return error_errno(_("cannot open %s"), filename);
903
904 if (raw_url)
905 url = transport_anonymize_url(raw_url);
906 else
907 url = xstrdup("foreign");
908
909 if (!connectivity_checked) {
910 struct check_connected_options opt = CHECK_CONNECTED_INIT;
911
912 rm = ref_map;
913 if (check_connected(iterate_ref_map, &rm, &opt)) {
914 rc = error(_("%s did not send all necessary objects\n"), url);
915 goto abort;
916 }
917 }
918
919 prepare_format_display(ref_map);
920
921 /*
922 * We do a pass for each fetch_head_status type in their enum order, so
923 * merged entries are written before not-for-merge. That lets readers
924 * use FETCH_HEAD as a refname to refer to the ref to be merged.
925 */
926 for (want_status = FETCH_HEAD_MERGE;
927 want_status <= FETCH_HEAD_IGNORE;
928 want_status++) {
929 for (rm = ref_map; rm; rm = rm->next) {
930 struct ref *ref = NULL;
931 const char *merge_status_marker = "";
932
933 if (rm->status == REF_STATUS_REJECT_SHALLOW) {
934 if (want_status == FETCH_HEAD_MERGE)
935 warning(_("reject %s because shallow roots are not allowed to be updated"),
936 rm->peer_ref ? rm->peer_ref->name : rm->name);
937 continue;
938 }
939
940 commit = lookup_commit_reference_gently(the_repository,
941 &rm->old_oid,
942 1);
943 if (!commit)
944 rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE;
945
946 if (rm->fetch_head_status != want_status)
947 continue;
948
949 if (rm->peer_ref) {
950 ref = alloc_ref(rm->peer_ref->name);
951 oidcpy(&ref->old_oid, &rm->peer_ref->old_oid);
952 oidcpy(&ref->new_oid, &rm->old_oid);
953 ref->force = rm->peer_ref->force;
954 }
955
956 if (recurse_submodules != RECURSE_SUBMODULES_OFF)
957 check_for_new_submodule_commits(&rm->old_oid);
958
959 if (!strcmp(rm->name, "HEAD")) {
960 kind = "";
961 what = "";
962 }
963 else if (skip_prefix(rm->name, "refs/heads/", &what))
964 kind = "branch";
965 else if (skip_prefix(rm->name, "refs/tags/", &what))
966 kind = "tag";
967 else if (skip_prefix(rm->name, "refs/remotes/", &what))
968 kind = "remote-tracking branch";
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_with_flags(&r->old_oid,
1078 OBJECT_INFO_SKIP_FETCH_OBJECT))
1079 return -1;
1080 }
1081
1082 opt.quiet = 1;
1083 return check_connected(iterate_ref_map, &rm, &opt);
1084 }
1085
1086 static int fetch_refs(struct transport *transport, struct ref *ref_map)
1087 {
1088 int ret = check_exist_and_connected(ref_map);
1089 if (ret) {
1090 trace2_region_enter("fetch", "fetch_refs", the_repository);
1091 ret = transport_fetch_refs(transport, ref_map);
1092 trace2_region_leave("fetch", "fetch_refs", the_repository);
1093 }
1094 if (!ret)
1095 /*
1096 * Keep the new pack's ".keep" file around to allow the caller
1097 * time to update refs to reference the new objects.
1098 */
1099 return 0;
1100 transport_unlock_pack(transport);
1101 return ret;
1102 }
1103
1104 /* Update local refs based on the ref values fetched from a remote */
1105 static int consume_refs(struct transport *transport, struct ref *ref_map)
1106 {
1107 int connectivity_checked = transport->smart_options
1108 ? transport->smart_options->connectivity_checked : 0;
1109 int ret;
1110 trace2_region_enter("fetch", "consume_refs", the_repository);
1111 ret = store_updated_refs(transport->url,
1112 transport->remote->name,
1113 connectivity_checked,
1114 ref_map);
1115 transport_unlock_pack(transport);
1116 trace2_region_leave("fetch", "consume_refs", the_repository);
1117 return ret;
1118 }
1119
1120 static int prune_refs(struct refspec *rs, struct ref *ref_map,
1121 const char *raw_url)
1122 {
1123 int url_len, i, result = 0;
1124 struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map);
1125 char *url;
1126 int summary_width = transport_summary_width(stale_refs);
1127 const char *dangling_msg = dry_run
1128 ? _(" (%s will become dangling)")
1129 : _(" (%s has become dangling)");
1130
1131 if (raw_url)
1132 url = transport_anonymize_url(raw_url);
1133 else
1134 url = xstrdup("foreign");
1135
1136 url_len = strlen(url);
1137 for (i = url_len - 1; url[i] == '/' && 0 <= i; i--)
1138 ;
1139
1140 url_len = i + 1;
1141 if (4 < i && !strncmp(".git", url + i - 3, 4))
1142 url_len = i - 3;
1143
1144 if (!dry_run) {
1145 struct string_list refnames = STRING_LIST_INIT_NODUP;
1146
1147 for (ref = stale_refs; ref; ref = ref->next)
1148 string_list_append(&refnames, ref->name);
1149
1150 result = delete_refs("fetch: prune", &refnames, 0);
1151 string_list_clear(&refnames, 0);
1152 }
1153
1154 if (verbosity >= 0) {
1155 for (ref = stale_refs; ref; ref = ref->next) {
1156 struct strbuf sb = STRBUF_INIT;
1157 if (!shown_url) {
1158 fprintf(stderr, _("From %.*s\n"), url_len, url);
1159 shown_url = 1;
1160 }
1161 format_display(&sb, '-', _("[deleted]"), NULL,
1162 _("(none)"), prettify_refname(ref->name),
1163 summary_width);
1164 fprintf(stderr, " %s\n",sb.buf);
1165 strbuf_release(&sb);
1166 warn_dangling_symref(stderr, dangling_msg, ref->name);
1167 }
1168 }
1169
1170 free(url);
1171 free_refs(stale_refs);
1172 return result;
1173 }
1174
1175 static void check_not_current_branch(struct ref *ref_map)
1176 {
1177 struct branch *current_branch = branch_get(NULL);
1178
1179 if (is_bare_repository() || !current_branch)
1180 return;
1181
1182 for (; ref_map; ref_map = ref_map->next)
1183 if (ref_map->peer_ref && !strcmp(current_branch->refname,
1184 ref_map->peer_ref->name))
1185 die(_("Refusing to fetch into current branch %s "
1186 "of non-bare repository"), current_branch->refname);
1187 }
1188
1189 static int truncate_fetch_head(void)
1190 {
1191 const char *filename = git_path_fetch_head(the_repository);
1192 FILE *fp = fopen_for_writing(filename);
1193
1194 if (!fp)
1195 return error_errno(_("cannot open %s"), filename);
1196 fclose(fp);
1197 return 0;
1198 }
1199
1200 static void set_option(struct transport *transport, const char *name, const char *value)
1201 {
1202 int r = transport_set_option(transport, name, value);
1203 if (r < 0)
1204 die(_("Option \"%s\" value \"%s\" is not valid for %s"),
1205 name, value, transport->url);
1206 if (r > 0)
1207 warning(_("Option \"%s\" is ignored for %s\n"),
1208 name, transport->url);
1209 }
1210
1211
1212 static int add_oid(const char *refname, const struct object_id *oid, int flags,
1213 void *cb_data)
1214 {
1215 struct oid_array *oids = cb_data;
1216
1217 oid_array_append(oids, oid);
1218 return 0;
1219 }
1220
1221 static void add_negotiation_tips(struct git_transport_options *smart_options)
1222 {
1223 struct oid_array *oids = xcalloc(1, sizeof(*oids));
1224 int i;
1225
1226 for (i = 0; i < negotiation_tip.nr; i++) {
1227 const char *s = negotiation_tip.items[i].string;
1228 int old_nr;
1229 if (!has_glob_specials(s)) {
1230 struct object_id oid;
1231 if (get_oid(s, &oid))
1232 die("%s is not a valid object", s);
1233 oid_array_append(oids, &oid);
1234 continue;
1235 }
1236 old_nr = oids->nr;
1237 for_each_glob_ref(add_oid, s, oids);
1238 if (old_nr == oids->nr)
1239 warning("Ignoring --negotiation-tip=%s because it does not match any refs",
1240 s);
1241 }
1242 smart_options->negotiation_tips = oids;
1243 }
1244
1245 static struct transport *prepare_transport(struct remote *remote, int deepen)
1246 {
1247 struct transport *transport;
1248
1249 transport = transport_get(remote, NULL);
1250 transport_set_verbosity(transport, verbosity, progress);
1251 transport->family = family;
1252 if (upload_pack)
1253 set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack);
1254 if (keep)
1255 set_option(transport, TRANS_OPT_KEEP, "yes");
1256 if (depth)
1257 set_option(transport, TRANS_OPT_DEPTH, depth);
1258 if (deepen && deepen_since)
1259 set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since);
1260 if (deepen && deepen_not.nr)
1261 set_option(transport, TRANS_OPT_DEEPEN_NOT,
1262 (const char *)&deepen_not);
1263 if (deepen_relative)
1264 set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes");
1265 if (update_shallow)
1266 set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes");
1267 if (filter_options.choice) {
1268 const char *spec =
1269 expand_list_objects_filter_spec(&filter_options);
1270 set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
1271 set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
1272 }
1273 if (negotiation_tip.nr) {
1274 if (transport->smart_options)
1275 add_negotiation_tips(transport->smart_options);
1276 else
1277 warning("Ignoring --negotiation-tip because the protocol does not support it.");
1278 }
1279 return transport;
1280 }
1281
1282 static void backfill_tags(struct transport *transport, struct ref *ref_map)
1283 {
1284 int cannot_reuse;
1285
1286 /*
1287 * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it
1288 * when remote helper is used (setting it to an empty string
1289 * is not unsetting). We could extend the remote helper
1290 * protocol for that, but for now, just force a new connection
1291 * without deepen-since. Similar story for deepen-not.
1292 */
1293 cannot_reuse = transport->cannot_reuse ||
1294 deepen_since || deepen_not.nr;
1295 if (cannot_reuse) {
1296 gsecondary = prepare_transport(transport->remote, 0);
1297 transport = gsecondary;
1298 }
1299
1300 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL);
1301 transport_set_option(transport, TRANS_OPT_DEPTH, "0");
1302 transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL);
1303 if (!fetch_refs(transport, ref_map))
1304 consume_refs(transport, ref_map);
1305
1306 if (gsecondary) {
1307 transport_disconnect(gsecondary);
1308 gsecondary = NULL;
1309 }
1310 }
1311
1312 static int do_fetch(struct transport *transport,
1313 struct refspec *rs)
1314 {
1315 struct ref *ref_map;
1316 int autotags = (transport->remote->fetch_tags == 1);
1317 int retcode = 0;
1318 const struct ref *remote_refs;
1319 struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
1320 int must_list_refs = 1;
1321
1322 if (tags == TAGS_DEFAULT) {
1323 if (transport->remote->fetch_tags == 2)
1324 tags = TAGS_SET;
1325 if (transport->remote->fetch_tags == -1)
1326 tags = TAGS_UNSET;
1327 }
1328
1329 /* if not appending, truncate FETCH_HEAD */
1330 if (!append && !dry_run) {
1331 retcode = truncate_fetch_head();
1332 if (retcode)
1333 goto cleanup;
1334 }
1335
1336 if (rs->nr) {
1337 int i;
1338
1339 refspec_ref_prefixes(rs, &ref_prefixes);
1340
1341 /*
1342 * We can avoid listing refs if all of them are exact
1343 * OIDs
1344 */
1345 must_list_refs = 0;
1346 for (i = 0; i < rs->nr; i++) {
1347 if (!rs->items[i].exact_sha1) {
1348 must_list_refs = 1;
1349 break;
1350 }
1351 }
1352 } else if (transport->remote && transport->remote->fetch.nr)
1353 refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes);
1354
1355 if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
1356 must_list_refs = 1;
1357 if (ref_prefixes.argc)
1358 argv_array_push(&ref_prefixes, "refs/tags/");
1359 }
1360
1361 if (must_list_refs) {
1362 trace2_region_enter("fetch", "remote_refs", the_repository);
1363 remote_refs = transport_get_remote_refs(transport, &ref_prefixes);
1364 trace2_region_leave("fetch", "remote_refs", the_repository);
1365 } else
1366 remote_refs = NULL;
1367
1368 argv_array_clear(&ref_prefixes);
1369
1370 ref_map = get_ref_map(transport->remote, remote_refs, rs,
1371 tags, &autotags);
1372 if (!update_head_ok)
1373 check_not_current_branch(ref_map);
1374
1375 if (tags == TAGS_DEFAULT && autotags)
1376 transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");
1377 if (prune) {
1378 /*
1379 * We only prune based on refspecs specified
1380 * explicitly (via command line or configuration); we
1381 * don't care whether --tags was specified.
1382 */
1383 if (rs->nr) {
1384 prune_refs(rs, ref_map, transport->url);
1385 } else {
1386 prune_refs(&transport->remote->fetch,
1387 ref_map,
1388 transport->url);
1389 }
1390 }
1391 if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) {
1392 free_refs(ref_map);
1393 retcode = 1;
1394 goto cleanup;
1395 }
1396
1397 if (set_upstream) {
1398 struct branch *branch = branch_get("HEAD");
1399 struct ref *rm;
1400 struct ref *source_ref = NULL;
1401
1402 /*
1403 * We're setting the upstream configuration for the
1404 * current branch. The relevant upstream is the
1405 * fetched branch that is meant to be merged with the
1406 * current one, i.e. the one fetched to FETCH_HEAD.
1407 *
1408 * When there are several such branches, consider the
1409 * request ambiguous and err on the safe side by doing
1410 * nothing and just emit a warning.
1411 */
1412 for (rm = ref_map; rm; rm = rm->next) {
1413 if (!rm->peer_ref) {
1414 if (source_ref) {
1415 warning(_("multiple branches detected, incompatible with --set-upstream"));
1416 goto skip;
1417 } else {
1418 source_ref = rm;
1419 }
1420 }
1421 }
1422 if (source_ref) {
1423 if (!strcmp(source_ref->name, "HEAD") ||
1424 starts_with(source_ref->name, "refs/heads/"))
1425 install_branch_config(0,
1426 branch->name,
1427 transport->remote->name,
1428 source_ref->name);
1429 else if (starts_with(source_ref->name, "refs/remotes/"))
1430 warning(_("not setting upstream for a remote remote-tracking branch"));
1431 else if (starts_with(source_ref->name, "refs/tags/"))
1432 warning(_("not setting upstream for a remote tag"));
1433 else
1434 warning(_("unknown branch type"));
1435 } else {
1436 warning(_("no source branch found.\n"
1437 "you need to specify exactly one branch with the --set-upstream option."));
1438 }
1439 }
1440 skip:
1441 free_refs(ref_map);
1442
1443 /* if neither --no-tags nor --tags was specified, do automated tag
1444 * following ... */
1445 if (tags == TAGS_DEFAULT && autotags) {
1446 struct ref **tail = &ref_map;
1447 ref_map = NULL;
1448 find_non_local_tags(remote_refs, &ref_map, &tail);
1449 if (ref_map)
1450 backfill_tags(transport, ref_map);
1451 free_refs(ref_map);
1452 }
1453
1454 cleanup:
1455 return retcode;
1456 }
1457
1458 static int get_one_remote_for_fetch(struct remote *remote, void *priv)
1459 {
1460 struct string_list *list = priv;
1461 if (!remote->skip_default_update)
1462 string_list_append(list, remote->name);
1463 return 0;
1464 }
1465
1466 struct remote_group_data {
1467 const char *name;
1468 struct string_list *list;
1469 };
1470
1471 static int get_remote_group(const char *key, const char *value, void *priv)
1472 {
1473 struct remote_group_data *g = priv;
1474
1475 if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) {
1476 /* split list by white space */
1477 while (*value) {
1478 size_t wordlen = strcspn(value, " \t\n");
1479
1480 if (wordlen >= 1)
1481 string_list_append_nodup(g->list,
1482 xstrndup(value, wordlen));
1483 value += wordlen + (value[wordlen] != '\0');
1484 }
1485 }
1486
1487 return 0;
1488 }
1489
1490 static int add_remote_or_group(const char *name, struct string_list *list)
1491 {
1492 int prev_nr = list->nr;
1493 struct remote_group_data g;
1494 g.name = name; g.list = list;
1495
1496 git_config(get_remote_group, &g);
1497 if (list->nr == prev_nr) {
1498 struct remote *remote = remote_get(name);
1499 if (!remote_is_configured(remote, 0))
1500 return 0;
1501 string_list_append(list, remote->name);
1502 }
1503 return 1;
1504 }
1505
1506 static void add_options_to_argv(struct argv_array *argv)
1507 {
1508 if (dry_run)
1509 argv_array_push(argv, "--dry-run");
1510 if (prune != -1)
1511 argv_array_push(argv, prune ? "--prune" : "--no-prune");
1512 if (prune_tags != -1)
1513 argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
1514 if (update_head_ok)
1515 argv_array_push(argv, "--update-head-ok");
1516 if (force)
1517 argv_array_push(argv, "--force");
1518 if (keep)
1519 argv_array_push(argv, "--keep");
1520 if (recurse_submodules == RECURSE_SUBMODULES_ON)
1521 argv_array_push(argv, "--recurse-submodules");
1522 else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
1523 argv_array_push(argv, "--recurse-submodules=on-demand");
1524 if (tags == TAGS_SET)
1525 argv_array_push(argv, "--tags");
1526 else if (tags == TAGS_UNSET)
1527 argv_array_push(argv, "--no-tags");
1528 if (verbosity >= 2)
1529 argv_array_push(argv, "-v");
1530 if (verbosity >= 1)
1531 argv_array_push(argv, "-v");
1532 else if (verbosity < 0)
1533 argv_array_push(argv, "-q");
1534
1535 }
1536
1537 /* Fetch multiple remotes in parallel */
1538
1539 struct parallel_fetch_state {
1540 const char **argv;
1541 struct string_list *remotes;
1542 int next, result;
1543 };
1544
1545 static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
1546 void *cb, void **task_cb)
1547 {
1548 struct parallel_fetch_state *state = cb;
1549 char *remote;
1550
1551 if (state->next < 0 || state->next >= state->remotes->nr)
1552 return 0;
1553
1554 remote = state->remotes->items[state->next++].string;
1555 *task_cb = remote;
1556
1557 argv_array_pushv(&cp->args, state->argv);
1558 argv_array_push(&cp->args, remote);
1559 cp->git_cmd = 1;
1560
1561 if (verbosity >= 0)
1562 printf(_("Fetching %s\n"), remote);
1563
1564 return 1;
1565 }
1566
1567 static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
1568 {
1569 struct parallel_fetch_state *state = cb;
1570 const char *remote = task_cb;
1571
1572 state->result = error(_("Could not fetch %s"), remote);
1573
1574 return 0;
1575 }
1576
1577 static int fetch_finished(int result, struct strbuf *out,
1578 void *cb, void *task_cb)
1579 {
1580 struct parallel_fetch_state *state = cb;
1581 const char *remote = task_cb;
1582
1583 if (result) {
1584 strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
1585 remote, result);
1586 state->result = -1;
1587 }
1588
1589 return 0;
1590 }
1591
1592 static int fetch_multiple(struct string_list *list, int max_children)
1593 {
1594 int i, result = 0;
1595 struct argv_array argv = ARGV_ARRAY_INIT;
1596
1597 if (!append && !dry_run) {
1598 int errcode = truncate_fetch_head();
1599 if (errcode)
1600 return errcode;
1601 }
1602
1603 argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc",
1604 "--no-write-commit-graph", NULL);
1605 add_options_to_argv(&argv);
1606
1607 if (max_children != 1 && list->nr != 1) {
1608 struct parallel_fetch_state state = { argv.argv, list, 0, 0 };
1609
1610 argv_array_push(&argv, "--end-of-options");
1611 result = run_processes_parallel_tr2(max_children,
1612 &fetch_next_remote,
1613 &fetch_failed_to_start,
1614 &fetch_finished,
1615 &state,
1616 "fetch", "parallel/fetch");
1617
1618 if (!result)
1619 result = state.result;
1620 } else
1621 for (i = 0; i < list->nr; i++) {
1622 const char *name = list->items[i].string;
1623 argv_array_push(&argv, name);
1624 if (verbosity >= 0)
1625 printf(_("Fetching %s\n"), name);
1626 if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
1627 error(_("Could not fetch %s"), name);
1628 result = 1;
1629 }
1630 argv_array_pop(&argv);
1631 }
1632
1633 argv_array_clear(&argv);
1634 return !!result;
1635 }
1636
1637 /*
1638 * Fetching from the promisor remote should use the given filter-spec
1639 * or inherit the default filter-spec from the config.
1640 */
1641 static inline void fetch_one_setup_partial(struct remote *remote)
1642 {
1643 /*
1644 * Explicit --no-filter argument overrides everything, regardless
1645 * of any prior partial clones and fetches.
1646 */
1647 if (filter_options.no_filter)
1648 return;
1649
1650 /*
1651 * If no prior partial clone/fetch and the current fetch DID NOT
1652 * request a partial-fetch, do a normal fetch.
1653 */
1654 if (!has_promisor_remote() && !filter_options.choice)
1655 return;
1656
1657 /*
1658 * If this is a partial-fetch request, we enable partial on
1659 * this repo if not already enabled and remember the given
1660 * filter-spec as the default for subsequent fetches to this
1661 * remote.
1662 */
1663 if (filter_options.choice) {
1664 partial_clone_register(remote->name, &filter_options);
1665 return;
1666 }
1667
1668 /*
1669 * Do a partial-fetch from the promisor remote using either the
1670 * explicitly given filter-spec or inherit the filter-spec from
1671 * the config.
1672 */
1673 if (!filter_options.choice)
1674 partial_clone_get_default_filter_spec(&filter_options, remote->name);
1675 return;
1676 }
1677
1678 static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok)
1679 {
1680 struct refspec rs = REFSPEC_INIT_FETCH;
1681 int i;
1682 int exit_code;
1683 int maybe_prune_tags;
1684 int remote_via_config = remote_is_configured(remote, 0);
1685
1686 if (!remote)
1687 die(_("No remote repository specified. Please, specify either a URL or a\n"
1688 "remote name from which new revisions should be fetched."));
1689
1690 gtransport = prepare_transport(remote, 1);
1691
1692 if (prune < 0) {
1693 /* no command line request */
1694 if (0 <= remote->prune)
1695 prune = remote->prune;
1696 else if (0 <= fetch_prune_config)
1697 prune = fetch_prune_config;
1698 else
1699 prune = PRUNE_BY_DEFAULT;
1700 }
1701
1702 if (prune_tags < 0) {
1703 /* no command line request */
1704 if (0 <= remote->prune_tags)
1705 prune_tags = remote->prune_tags;
1706 else if (0 <= fetch_prune_tags_config)
1707 prune_tags = fetch_prune_tags_config;
1708 else
1709 prune_tags = PRUNE_TAGS_BY_DEFAULT;
1710 }
1711
1712 maybe_prune_tags = prune_tags_ok && prune_tags;
1713 if (maybe_prune_tags && remote_via_config)
1714 refspec_append(&remote->fetch, TAG_REFSPEC);
1715
1716 if (maybe_prune_tags && (argc || !remote_via_config))
1717 refspec_append(&rs, TAG_REFSPEC);
1718
1719 for (i = 0; i < argc; i++) {
1720 if (!strcmp(argv[i], "tag")) {
1721 char *tag;
1722 i++;
1723 if (i >= argc)
1724 die(_("You need to specify a tag name."));
1725
1726 tag = xstrfmt("refs/tags/%s:refs/tags/%s",
1727 argv[i], argv[i]);
1728 refspec_append(&rs, tag);
1729 free(tag);
1730 } else {
1731 refspec_append(&rs, argv[i]);
1732 }
1733 }
1734
1735 if (server_options.nr)
1736 gtransport->server_options = &server_options;
1737
1738 sigchain_push_common(unlock_pack_on_signal);
1739 atexit(unlock_pack);
1740 sigchain_push(SIGPIPE, SIG_IGN);
1741 exit_code = do_fetch(gtransport, &rs);
1742 sigchain_pop(SIGPIPE);
1743 refspec_clear(&rs);
1744 transport_disconnect(gtransport);
1745 gtransport = NULL;
1746 return exit_code;
1747 }
1748
1749 int cmd_fetch(int argc, const char **argv, const char *prefix)
1750 {
1751 int i;
1752 struct string_list list = STRING_LIST_INIT_DUP;
1753 struct remote *remote = NULL;
1754 int result = 0;
1755 int prune_tags_ok = 1;
1756
1757 packet_trace_identity("fetch");
1758
1759 /* Record the command line for the reflog */
1760 strbuf_addstr(&default_rla, "fetch");
1761 for (i = 1; i < argc; i++)
1762 strbuf_addf(&default_rla, " %s", argv[i]);
1763
1764 fetch_config_from_gitmodules(&submodule_fetch_jobs_config,
1765 &recurse_submodules);
1766 git_config(git_fetch_config, NULL);
1767
1768 argc = parse_options(argc, argv, prefix,
1769 builtin_fetch_options, builtin_fetch_usage, 0);
1770
1771 if (deepen_relative) {
1772 if (deepen_relative < 0)
1773 die(_("Negative depth in --deepen is not supported"));
1774 if (depth)
1775 die(_("--deepen and --depth are mutually exclusive"));
1776 depth = xstrfmt("%d", deepen_relative);
1777 }
1778 if (unshallow) {
1779 if (depth)
1780 die(_("--depth and --unshallow cannot be used together"));
1781 else if (!is_repository_shallow(the_repository))
1782 die(_("--unshallow on a complete repository does not make sense"));
1783 else
1784 depth = xstrfmt("%d", INFINITE_DEPTH);
1785 }
1786
1787 /* no need to be strict, transport_set_option() will validate it again */
1788 if (depth && atoi(depth) < 1)
1789 die(_("depth %s is not a positive number"), depth);
1790 if (depth || deepen_since || deepen_not.nr)
1791 deepen = 1;
1792
1793 if (filter_options.choice && !has_promisor_remote())
1794 die("--filter can only be used when extensions.partialClone is set");
1795
1796 if (all) {
1797 if (argc == 1)
1798 die(_("fetch --all does not take a repository argument"));
1799 else if (argc > 1)
1800 die(_("fetch --all does not make sense with refspecs"));
1801 (void) for_each_remote(get_one_remote_for_fetch, &list);
1802 } else if (argc == 0) {
1803 /* No arguments -- use default remote */
1804 remote = remote_get(NULL);
1805 } else if (multiple) {
1806 /* All arguments are assumed to be remotes or groups */
1807 for (i = 0; i < argc; i++)
1808 if (!add_remote_or_group(argv[i], &list))
1809 die(_("No such remote or remote group: %s"), argv[i]);
1810 } else {
1811 /* Single remote or group */
1812 (void) add_remote_or_group(argv[0], &list);
1813 if (list.nr > 1) {
1814 /* More than one remote */
1815 if (argc > 1)
1816 die(_("Fetching a group and specifying refspecs does not make sense"));
1817 } else {
1818 /* Zero or one remotes */
1819 remote = remote_get(argv[0]);
1820 prune_tags_ok = (argc == 1);
1821 argc--;
1822 argv++;
1823 }
1824 }
1825
1826 if (remote) {
1827 if (filter_options.choice || has_promisor_remote())
1828 fetch_one_setup_partial(remote);
1829 result = fetch_one(remote, argc, argv, prune_tags_ok);
1830 } else {
1831 int max_children = max_jobs;
1832
1833 if (filter_options.choice)
1834 die(_("--filter can only be used with the remote "
1835 "configured in extensions.partialclone"));
1836
1837 if (max_children < 0)
1838 max_children = fetch_parallel_config;
1839
1840 /* TODO should this also die if we have a previous partial-clone? */
1841 result = fetch_multiple(&list, max_children);
1842 }
1843
1844 if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
1845 struct argv_array options = ARGV_ARRAY_INIT;
1846 int max_children = max_jobs;
1847
1848 if (max_children < 0)
1849 max_children = submodule_fetch_jobs_config;
1850 if (max_children < 0)
1851 max_children = fetch_parallel_config;
1852
1853 add_options_to_argv(&options);
1854 result = fetch_populated_submodules(the_repository,
1855 &options,
1856 submodule_prefix,
1857 recurse_submodules,
1858 recurse_submodules_default,
1859 verbosity < 0,
1860 max_children);
1861 argv_array_clear(&options);
1862 }
1863
1864 string_list_clear(&list, 0);
1865
1866 prepare_repo_settings(the_repository);
1867 if (fetch_write_commit_graph > 0 ||
1868 (fetch_write_commit_graph < 0 &&
1869 the_repository->settings.fetch_write_commit_graph)) {
1870 int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
1871
1872 if (progress)
1873 commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
1874
1875 write_commit_graph_reachable(the_repository->objects->odb,
1876 commit_graph_flags,
1877 NULL);
1878 }
1879
1880 close_object_store(the_repository->objects);
1881
1882 if (enable_auto_gc)
1883 run_auto_gc(verbosity < 0);
1884
1885 return result;
1886 }
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