/* * "git fetch" */ #include "cache.h" #include "config.h" #include "repository.h" #include "refs.h" #include "refspec.h" #include "object-store.h" #include "commit.h" #include "builtin.h" #include "string-list.h" #include "remote.h" #include "transport.h" #include "run-command.h" #include "parse-options.h" #include "sigchain.h" #include "submodule-config.h" #include "submodule.h" #include "connected.h" #include "argv-array.h" #include "utf8.h" #include "packfile.h" #include "list-objects-filter-options.h" #include "commit-reach.h" #define FORCED_UPDATES_DELAY_WARNING_IN_MS (10 * 1000) static const char * const builtin_fetch_usage[] = { N_("git fetch [<options>] [<repository> [<refspec>...]]"), N_("git fetch [<options>] <group>"), N_("git fetch --multiple [<options>] [(<repository> | <group>)...]"), N_("git fetch --all [<options>]"), NULL }; enum { TAGS_UNSET = 0, TAGS_DEFAULT = 1, TAGS_SET = 2 }; static int fetch_prune_config = -1; /* unspecified */ static int fetch_show_forced_updates = 1; static uint64_t forced_updates_ms = 0; static int prune = -1; /* unspecified */ #define PRUNE_BY_DEFAULT 0 /* do we prune by default? */ static int fetch_prune_tags_config = -1; /* unspecified */ static int prune_tags = -1; /* unspecified */ #define PRUNE_TAGS_BY_DEFAULT 0 /* do we prune tags by default? */ static int all, append, dry_run, force, keep, multiple, update_head_ok, verbosity, deepen_relative; static int progress = -1; static int enable_auto_gc = 1; static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen; static int max_children = 1; static enum transport_family family; static const char *depth; static const char *deepen_since; static const char *upload_pack; static struct string_list deepen_not = STRING_LIST_INIT_NODUP; static struct strbuf default_rla = STRBUF_INIT; static struct transport *gtransport; static struct transport *gsecondary; static const char *submodule_prefix = ""; static int recurse_submodules = RECURSE_SUBMODULES_DEFAULT; static int recurse_submodules_default = RECURSE_SUBMODULES_ON_DEMAND; static int shown_url = 0; static struct refspec refmap = REFSPEC_INIT_FETCH; static struct list_objects_filter_options filter_options; static struct string_list server_options = STRING_LIST_INIT_DUP; static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP; static int git_fetch_config(const char *k, const char *v, void *cb) { if (!strcmp(k, "fetch.prune")) { fetch_prune_config = git_config_bool(k, v); return 0; } if (!strcmp(k, "fetch.prunetags")) { fetch_prune_tags_config = git_config_bool(k, v); return 0; } if (!strcmp(k, "fetch.showforcedupdates")) { fetch_show_forced_updates = git_config_bool(k, v); return 0; } if (!strcmp(k, "submodule.recurse")) { int r = git_config_bool(k, v) ? RECURSE_SUBMODULES_ON : RECURSE_SUBMODULES_OFF; recurse_submodules = r; } if (!strcmp(k, "submodule.fetchjobs")) { max_children = parse_submodule_fetchjobs(k, v); return 0; } else if (!strcmp(k, "fetch.recursesubmodules")) { recurse_submodules = parse_fetch_recurse_submodules_arg(k, v); return 0; } return git_default_config(k, v, cb); } static int parse_refmap_arg(const struct option *opt, const char *arg, int unset) { BUG_ON_OPT_NEG(unset); /* * "git fetch --refmap='' origin foo" * can be used to tell the command not to store anywhere */ refspec_append(&refmap, arg); return 0; } static struct option builtin_fetch_options[] = { OPT__VERBOSITY(&verbosity), OPT_BOOL(0, "all", &all, N_("fetch from all remotes")), OPT_BOOL('a', "append", &append, N_("append to .git/FETCH_HEAD instead of overwriting")), OPT_STRING(0, "upload-pack", &upload_pack, N_("path"), N_("path to upload pack on remote end")), OPT__FORCE(&force, N_("force overwrite of local reference"), 0), OPT_BOOL('m', "multiple", &multiple, N_("fetch from multiple remotes")), OPT_SET_INT('t', "tags", &tags, N_("fetch all tags and associated objects"), TAGS_SET), OPT_SET_INT('n', NULL, &tags, N_("do not fetch all tags (--no-tags)"), TAGS_UNSET), OPT_INTEGER('j', "jobs", &max_children, N_("number of submodules fetched in parallel")), OPT_BOOL('p', "prune", &prune, N_("prune remote-tracking branches no longer on remote")), OPT_BOOL('P', "prune-tags", &prune_tags, N_("prune local tags no longer on remote and clobber changed tags")), { OPTION_CALLBACK, 0, "recurse-submodules", &recurse_submodules, N_("on-demand"), N_("control recursive fetching of submodules"), PARSE_OPT_OPTARG, option_fetch_parse_recurse_submodules }, OPT_BOOL(0, "dry-run", &dry_run, N_("dry run")), OPT_BOOL('k', "keep", &keep, N_("keep downloaded pack")), OPT_BOOL('u', "update-head-ok", &update_head_ok, N_("allow updating of HEAD ref")), OPT_BOOL(0, "progress", &progress, N_("force progress reporting")), OPT_STRING(0, "depth", &depth, N_("depth"), N_("deepen history of shallow clone")), OPT_STRING(0, "shallow-since", &deepen_since, N_("time"), N_("deepen history of shallow repository based on time")), OPT_STRING_LIST(0, "shallow-exclude", &deepen_not, N_("revision"), N_("deepen history of shallow clone, excluding rev")), OPT_INTEGER(0, "deepen", &deepen_relative, N_("deepen history of shallow clone")), OPT_SET_INT_F(0, "unshallow", &unshallow, N_("convert to a complete repository"), 1, PARSE_OPT_NONEG), { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"), N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN }, { OPTION_CALLBACK, 0, "recurse-submodules-default", &recurse_submodules_default, N_("on-demand"), N_("default for recursive fetching of submodules " "(lower priority than config files)"), PARSE_OPT_HIDDEN, option_fetch_parse_recurse_submodules }, OPT_BOOL(0, "update-shallow", &update_shallow, N_("accept refs that update .git/shallow")), { OPTION_CALLBACK, 0, "refmap", NULL, N_("refmap"), N_("specify fetch refmap"), PARSE_OPT_NONEG, parse_refmap_arg }, OPT_STRING_LIST('o', "server-option", &server_options, N_("server-specific"), N_("option to transmit")), OPT_SET_INT('4', "ipv4", &family, N_("use IPv4 addresses only"), TRANSPORT_FAMILY_IPV4), OPT_SET_INT('6', "ipv6", &family, N_("use IPv6 addresses only"), TRANSPORT_FAMILY_IPV6), OPT_STRING_LIST(0, "negotiation-tip", &negotiation_tip, N_("revision"), N_("report that we have only objects reachable from this object")), OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options), OPT_BOOL(0, "auto-gc", &enable_auto_gc, N_("run 'gc --auto' after fetching")), OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates, N_("check for forced-updates on all updated branches")), OPT_END() }; static void unlock_pack(void) { if (gtransport) transport_unlock_pack(gtransport); if (gsecondary) transport_unlock_pack(gsecondary); } static void unlock_pack_on_signal(int signo) { unlock_pack(); sigchain_pop(signo); raise(signo); } static void add_merge_config(struct ref **head, const struct ref *remote_refs, struct branch *branch, struct ref ***tail) { int i; for (i = 0; i < branch->merge_nr; i++) { struct ref *rm, **old_tail = *tail; struct refspec_item refspec; for (rm = *head; rm; rm = rm->next) { if (branch_merge_matches(branch, i, rm->name)) { rm->fetch_head_status = FETCH_HEAD_MERGE; break; } } if (rm) continue; /* * Not fetched to a remote-tracking branch? We need to fetch * it anyway to allow this branch's "branch.$name.merge" * to be honored by 'git pull', but we do not have to * fail if branch.$name.merge is misconfigured to point * at a nonexisting branch. If we were indeed called by * 'git pull', it will notice the misconfiguration because * there is no entry in the resulting FETCH_HEAD marked * for merging. */ memset(&refspec, 0, sizeof(refspec)); refspec.src = branch->merge[i]->src; get_fetch_map(remote_refs, &refspec, tail, 1); for (rm = *old_tail; rm; rm = rm->next) rm->fetch_head_status = FETCH_HEAD_MERGE; } } static int will_fetch(struct ref **head, const unsigned char *sha1) { struct ref *rm = *head; while (rm) { if (hasheq(rm->old_oid.hash, sha1)) return 1; rm = rm->next; } return 0; } struct refname_hash_entry { struct hashmap_entry ent; /* must be the first member */ struct object_id oid; int ignore; char refname[FLEX_ARRAY]; }; static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data, const void *e1_, const void *e2_, const void *keydata) { const struct refname_hash_entry *e1 = e1_; const struct refname_hash_entry *e2 = e2_; return strcmp(e1->refname, keydata ? keydata : e2->refname); } static struct refname_hash_entry *refname_hash_add(struct hashmap *map, const char *refname, const struct object_id *oid) { struct refname_hash_entry *ent; size_t len = strlen(refname); FLEX_ALLOC_MEM(ent, refname, refname, len); hashmap_entry_init(&ent->ent, strhash(refname)); oidcpy(&ent->oid, oid); hashmap_add(map, &ent->ent); return ent; } static int add_one_refname(const char *refname, const struct object_id *oid, int flag, void *cbdata) { struct hashmap *refname_map = cbdata; (void) refname_hash_add(refname_map, refname, oid); return 0; } static void refname_hash_init(struct hashmap *map) { hashmap_init(map, refname_hash_entry_cmp, NULL, 0); } static int refname_hash_exists(struct hashmap *map, const char *refname) { return !!hashmap_get_from_hash(map, strhash(refname), refname); } static void clear_item(struct refname_hash_entry *item) { item->ignore = 1; } static void find_non_local_tags(const struct ref *refs, struct ref **head, struct ref ***tail) { struct hashmap existing_refs; struct hashmap remote_refs; struct string_list remote_refs_list = STRING_LIST_INIT_NODUP; struct string_list_item *remote_ref_item; const struct ref *ref; struct refname_hash_entry *item = NULL; refname_hash_init(&existing_refs); refname_hash_init(&remote_refs); for_each_ref(add_one_refname, &existing_refs); for (ref = refs; ref; ref = ref->next) { if (!starts_with(ref->name, "refs/tags/")) continue; /* * The peeled ref always follows the matching base * ref, so if we see a peeled ref that we don't want * to fetch then we can mark the ref entry in the list * as one to ignore by setting util to NULL. */ if (ends_with(ref->name, "^{}")) { if (item && !has_object_file_with_flags(&ref->old_oid, OBJECT_INFO_QUICK) && !will_fetch(head, ref->old_oid.hash) && !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) && !will_fetch(head, item->oid.hash)) clear_item(item); item = NULL; continue; } /* * If item is non-NULL here, then we previously saw a * ref not followed by a peeled reference, so we need * to check if it is a lightweight tag that we want to * fetch. */ if (item && !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) && !will_fetch(head, item->oid.hash)) clear_item(item); item = NULL; /* skip duplicates and refs that we already have */ if (refname_hash_exists(&remote_refs, ref->name) || refname_hash_exists(&existing_refs, ref->name)) continue; item = refname_hash_add(&remote_refs, ref->name, &ref->old_oid); string_list_insert(&remote_refs_list, ref->name); } hashmap_free(&existing_refs, 1); /* * We may have a final lightweight tag that needs to be * checked to see if it needs fetching. */ if (item && !has_object_file_with_flags(&item->oid, OBJECT_INFO_QUICK) && !will_fetch(head, item->oid.hash)) clear_item(item); /* * For all the tags in the remote_refs_list, * add them to the list of refs to be fetched */ for_each_string_list_item(remote_ref_item, &remote_refs_list) { const char *refname = remote_ref_item->string; struct ref *rm; unsigned int hash = strhash(refname); item = hashmap_get_entry_from_hash(&remote_refs, hash, refname, struct refname_hash_entry, ent); if (!item) BUG("unseen remote ref?"); /* Unless we have already decided to ignore this item... */ if (item->ignore) continue; rm = alloc_ref(item->refname); rm->peer_ref = alloc_ref(item->refname); oidcpy(&rm->old_oid, &item->oid); **tail = rm; *tail = &rm->next; } hashmap_free(&remote_refs, 1); string_list_clear(&remote_refs_list, 0); } static struct ref *get_ref_map(struct remote *remote, const struct ref *remote_refs, struct refspec *rs, int tags, int *autotags) { int i; struct ref *rm; struct ref *ref_map = NULL; struct ref **tail = &ref_map; /* opportunistically-updated references: */ struct ref *orefs = NULL, **oref_tail = &orefs; struct hashmap existing_refs; if (rs->nr) { struct refspec *fetch_refspec; for (i = 0; i < rs->nr; i++) { get_fetch_map(remote_refs, &rs->items[i], &tail, 0); if (rs->items[i].dst && rs->items[i].dst[0]) *autotags = 1; } /* Merge everything on the command line (but not --tags) */ for (rm = ref_map; rm; rm = rm->next) rm->fetch_head_status = FETCH_HEAD_MERGE; /* * For any refs that we happen to be fetching via * command-line arguments, the destination ref might * have been missing or have been different than the * remote-tracking ref that would be derived from the * configured refspec. In these cases, we want to * take the opportunity to update their configured * remote-tracking reference. However, we do not want * to mention these entries in FETCH_HEAD at all, as * they would simply be duplicates of existing * entries, so we set them FETCH_HEAD_IGNORE below. * * We compute these entries now, based only on the * refspecs specified on the command line. But we add * them to the list following the refspecs resulting * from the tags option so that one of the latter, * which has FETCH_HEAD_NOT_FOR_MERGE, is not removed * by ref_remove_duplicates() in favor of one of these * opportunistic entries with FETCH_HEAD_IGNORE. */ if (refmap.nr) fetch_refspec = &refmap; else fetch_refspec = &remote->fetch; for (i = 0; i < fetch_refspec->nr; i++) get_fetch_map(ref_map, &fetch_refspec->items[i], &oref_tail, 1); } else if (refmap.nr) { die("--refmap option is only meaningful with command-line refspec(s)."); } else { /* Use the defaults */ struct branch *branch = branch_get(NULL); int has_merge = branch_has_merge_config(branch); if (remote && (remote->fetch.nr || /* Note: has_merge implies non-NULL branch->remote_name */ (has_merge && !strcmp(branch->remote_name, remote->name)))) { for (i = 0; i < remote->fetch.nr; i++) { get_fetch_map(remote_refs, &remote->fetch.items[i], &tail, 0); if (remote->fetch.items[i].dst && remote->fetch.items[i].dst[0]) *autotags = 1; if (!i && !has_merge && ref_map && !remote->fetch.items[0].pattern) ref_map->fetch_head_status = FETCH_HEAD_MERGE; } /* * if the remote we're fetching from is the same * as given in branch.<name>.remote, we add the * ref given in branch.<name>.merge, too. * * Note: has_merge implies non-NULL branch->remote_name */ if (has_merge && !strcmp(branch->remote_name, remote->name)) add_merge_config(&ref_map, remote_refs, branch, &tail); } else { ref_map = get_remote_ref(remote_refs, "HEAD"); if (!ref_map) die(_("Couldn't find remote ref HEAD")); ref_map->fetch_head_status = FETCH_HEAD_MERGE; tail = &ref_map->next; } } if (tags == TAGS_SET) /* also fetch all tags */ get_fetch_map(remote_refs, tag_refspec, &tail, 0); else if (tags == TAGS_DEFAULT && *autotags) find_non_local_tags(remote_refs, &ref_map, &tail); /* Now append any refs to be updated opportunistically: */ *tail = orefs; for (rm = orefs; rm; rm = rm->next) { rm->fetch_head_status = FETCH_HEAD_IGNORE; tail = &rm->next; } ref_map = ref_remove_duplicates(ref_map); refname_hash_init(&existing_refs); for_each_ref(add_one_refname, &existing_refs); for (rm = ref_map; rm; rm = rm->next) { if (rm->peer_ref) { const char *refname = rm->peer_ref->name; struct refname_hash_entry *peer_item; unsigned int hash = strhash(refname); peer_item = hashmap_get_entry_from_hash(&existing_refs, hash, refname, struct refname_hash_entry, ent); if (peer_item) { struct object_id *old_oid = &peer_item->oid; oidcpy(&rm->peer_ref->old_oid, old_oid); } } } hashmap_free(&existing_refs, 1); return ref_map; } #define STORE_REF_ERROR_OTHER 1 #define STORE_REF_ERROR_DF_CONFLICT 2 static int s_update_ref(const char *action, struct ref *ref, int check_old) { char *msg; char *rla = getenv("GIT_REFLOG_ACTION"); struct ref_transaction *transaction; struct strbuf err = STRBUF_INIT; int ret, df_conflict = 0; if (dry_run) return 0; if (!rla) rla = default_rla.buf; msg = xstrfmt("%s: %s", rla, action); transaction = ref_transaction_begin(&err); if (!transaction || ref_transaction_update(transaction, ref->name, &ref->new_oid, check_old ? &ref->old_oid : NULL, 0, msg, &err)) goto fail; ret = ref_transaction_commit(transaction, &err); if (ret) { df_conflict = (ret == TRANSACTION_NAME_CONFLICT); goto fail; } ref_transaction_free(transaction); strbuf_release(&err); free(msg); return 0; fail: ref_transaction_free(transaction); error("%s", err.buf); strbuf_release(&err); free(msg); return df_conflict ? STORE_REF_ERROR_DF_CONFLICT : STORE_REF_ERROR_OTHER; } static int refcol_width = 10; static int compact_format; static void adjust_refcol_width(const struct ref *ref) { int max, rlen, llen, len; /* uptodate lines are only shown on high verbosity level */ if (!verbosity && oideq(&ref->peer_ref->old_oid, &ref->old_oid)) return; max = term_columns(); rlen = utf8_strwidth(prettify_refname(ref->name)); llen = utf8_strwidth(prettify_refname(ref->peer_ref->name)); /* * rough estimation to see if the output line is too long and * should not be counted (we can't do precise calculation * anyway because we don't know if the error explanation part * will be printed in update_local_ref) */ if (compact_format) { llen = 0; max = max * 2 / 3; } len = 21 /* flag and summary */ + rlen + 4 /* -> */ + llen; if (len >= max) return; /* * Not precise calculation for compact mode because '*' can * appear on the left hand side of '->' and shrink the column * back. */ if (refcol_width < rlen) refcol_width = rlen; } static void prepare_format_display(struct ref *ref_map) { struct ref *rm; const char *format = "full"; git_config_get_string_const("fetch.output", &format); if (!strcasecmp(format, "full")) compact_format = 0; else if (!strcasecmp(format, "compact")) compact_format = 1; else die(_("configuration fetch.output contains invalid value %s"), format); for (rm = ref_map; rm; rm = rm->next) { if (rm->status == REF_STATUS_REJECT_SHALLOW || !rm->peer_ref || !strcmp(rm->name, "HEAD")) continue; adjust_refcol_width(rm); } } static void print_remote_to_local(struct strbuf *display, const char *remote, const char *local) { strbuf_addf(display, "%-*s -> %s", refcol_width, remote, local); } static int find_and_replace(struct strbuf *haystack, const char *needle, const char *placeholder) { const char *p = NULL; int plen, nlen; nlen = strlen(needle); if (ends_with(haystack->buf, needle)) p = haystack->buf + haystack->len - nlen; else p = strstr(haystack->buf, needle); if (!p) return 0; if (p > haystack->buf && p[-1] != '/') return 0; plen = strlen(p); if (plen > nlen && p[nlen] != '/') return 0; strbuf_splice(haystack, p - haystack->buf, nlen, placeholder, strlen(placeholder)); return 1; } static void print_compact(struct strbuf *display, const char *remote, const char *local) { struct strbuf r = STRBUF_INIT; struct strbuf l = STRBUF_INIT; if (!strcmp(remote, local)) { strbuf_addf(display, "%-*s -> *", refcol_width, remote); return; } strbuf_addstr(&r, remote); strbuf_addstr(&l, local); if (!find_and_replace(&r, local, "*")) find_and_replace(&l, remote, "*"); print_remote_to_local(display, r.buf, l.buf); strbuf_release(&r); strbuf_release(&l); } static void format_display(struct strbuf *display, char code, const char *summary, const char *error, const char *remote, const char *local, int summary_width) { int width = (summary_width + strlen(summary) - gettext_width(summary)); strbuf_addf(display, "%c %-*s ", code, width, summary); if (!compact_format) print_remote_to_local(display, remote, local); else print_compact(display, remote, local); if (error) strbuf_addf(display, " (%s)", error); } static int update_local_ref(struct ref *ref, const char *remote, const struct ref *remote_ref, struct strbuf *display, int summary_width) { struct commit *current = NULL, *updated; enum object_type type; struct branch *current_branch = branch_get(NULL); const char *pretty_ref = prettify_refname(ref->name); int fast_forward = 0; type = oid_object_info(the_repository, &ref->new_oid, NULL); if (type < 0) die(_("object %s not found"), oid_to_hex(&ref->new_oid)); if (oideq(&ref->old_oid, &ref->new_oid)) { if (verbosity > 0) format_display(display, '=', _("[up to date]"), NULL, remote, pretty_ref, summary_width); return 0; } if (current_branch && !strcmp(ref->name, current_branch->name) && !(update_head_ok || is_bare_repository()) && !is_null_oid(&ref->old_oid)) { /* * If this is the head, and it's not okay to update * the head, and the old value of the head isn't empty... */ format_display(display, '!', _("[rejected]"), _("can't fetch in current branch"), remote, pretty_ref, summary_width); return 1; } if (!is_null_oid(&ref->old_oid) && starts_with(ref->name, "refs/tags/")) { if (force || ref->force) { int r; r = s_update_ref("updating tag", ref, 0); format_display(display, r ? '!' : 't', _("[tag update]"), r ? _("unable to update local ref") : NULL, remote, pretty_ref, summary_width); return r; } else { format_display(display, '!', _("[rejected]"), _("would clobber existing tag"), remote, pretty_ref, summary_width); return 1; } } current = lookup_commit_reference_gently(the_repository, &ref->old_oid, 1); updated = lookup_commit_reference_gently(the_repository, &ref->new_oid, 1); if (!current || !updated) { const char *msg; const char *what; int r; /* * Nicely describe the new ref we're fetching. * Base this on the remote's ref name, as it's * more likely to follow a standard layout. */ const char *name = remote_ref ? remote_ref->name : ""; if (starts_with(name, "refs/tags/")) { msg = "storing tag"; what = _("[new tag]"); } else if (starts_with(name, "refs/heads/")) { msg = "storing head"; what = _("[new branch]"); } else { msg = "storing ref"; what = _("[new ref]"); } r = s_update_ref(msg, ref, 0); format_display(display, r ? '!' : '*', what, r ? _("unable to update local ref") : NULL, remote, pretty_ref, summary_width); return r; } if (fetch_show_forced_updates) { uint64_t t_before = getnanotime(); fast_forward = in_merge_bases(current, updated); forced_updates_ms += (getnanotime() - t_before) / 1000000; } else { fast_forward = 1; } if (fast_forward) { struct strbuf quickref = STRBUF_INIT; int r; strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV); strbuf_addstr(&quickref, ".."); strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV); r = s_update_ref("fast-forward", ref, 1); format_display(display, r ? '!' : ' ', quickref.buf, r ? _("unable to update local ref") : NULL, remote, pretty_ref, summary_width); strbuf_release(&quickref); return r; } else if (force || ref->force) { struct strbuf quickref = STRBUF_INIT; int r; strbuf_add_unique_abbrev(&quickref, ¤t->object.oid, DEFAULT_ABBREV); strbuf_addstr(&quickref, "..."); strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV); r = s_update_ref("forced-update", ref, 1); format_display(display, r ? '!' : '+', quickref.buf, r ? _("unable to update local ref") : _("forced update"), remote, pretty_ref, summary_width); strbuf_release(&quickref); return r; } else { format_display(display, '!', _("[rejected]"), _("non-fast-forward"), remote, pretty_ref, summary_width); return 1; } } static int iterate_ref_map(void *cb_data, struct object_id *oid) { struct ref **rm = cb_data; struct ref *ref = *rm; while (ref && ref->status == REF_STATUS_REJECT_SHALLOW) ref = ref->next; if (!ref) return -1; /* end of the list */ *rm = ref->next; oidcpy(oid, &ref->old_oid); return 0; } static const char warn_show_forced_updates[] = N_("Fetch normally indicates which branches had a forced update,\n" "but that check has been disabled. To re-enable, use '--show-forced-updates'\n" "flag or run 'git config fetch.showForcedUpdates true'."); static const char warn_time_show_forced_updates[] = N_("It took %.2f seconds to check forced updates. You can use\n" "'--no-show-forced-updates' or run 'git config fetch.showForcedUpdates false'\n" " to avoid this check.\n"); static int store_updated_refs(const char *raw_url, const char *remote_name, int connectivity_checked, struct ref *ref_map) { FILE *fp; struct commit *commit; int url_len, i, rc = 0; struct strbuf note = STRBUF_INIT; const char *what, *kind; struct ref *rm; char *url; const char *filename = dry_run ? "/dev/null" : git_path_fetch_head(the_repository); int want_status; int summary_width = transport_summary_width(ref_map); fp = fopen(filename, "a"); if (!fp) return error_errno(_("cannot open %s"), filename); if (raw_url) url = transport_anonymize_url(raw_url); else url = xstrdup("foreign"); if (!connectivity_checked) { rm = ref_map; if (check_connected(iterate_ref_map, &rm, NULL)) { rc = error(_("%s did not send all necessary objects\n"), url); goto abort; } } prepare_format_display(ref_map); /* * We do a pass for each fetch_head_status type in their enum order, so * merged entries are written before not-for-merge. That lets readers * use FETCH_HEAD as a refname to refer to the ref to be merged. */ for (want_status = FETCH_HEAD_MERGE; want_status <= FETCH_HEAD_IGNORE; want_status++) { for (rm = ref_map; rm; rm = rm->next) { struct ref *ref = NULL; const char *merge_status_marker = ""; if (rm->status == REF_STATUS_REJECT_SHALLOW) { if (want_status == FETCH_HEAD_MERGE) warning(_("reject %s because shallow roots are not allowed to be updated"), rm->peer_ref ? rm->peer_ref->name : rm->name); continue; } commit = lookup_commit_reference_gently(the_repository, &rm->old_oid, 1); if (!commit) rm->fetch_head_status = FETCH_HEAD_NOT_FOR_MERGE; if (rm->fetch_head_status != want_status) continue; if (rm->peer_ref) { ref = alloc_ref(rm->peer_ref->name); oidcpy(&ref->old_oid, &rm->peer_ref->old_oid); oidcpy(&ref->new_oid, &rm->old_oid); ref->force = rm->peer_ref->force; } if (recurse_submodules != RECURSE_SUBMODULES_OFF) check_for_new_submodule_commits(&rm->old_oid); if (!strcmp(rm->name, "HEAD")) { kind = ""; what = ""; } else if (starts_with(rm->name, "refs/heads/")) { kind = "branch"; what = rm->name + 11; } else if (starts_with(rm->name, "refs/tags/")) { kind = "tag"; what = rm->name + 10; } else if (starts_with(rm->name, "refs/remotes/")) { kind = "remote-tracking branch"; what = rm->name + 13; } else { kind = ""; what = rm->name; } url_len = strlen(url); for (i = url_len - 1; url[i] == '/' && 0 <= i; i--) ; url_len = i + 1; if (4 < i && !strncmp(".git", url + i - 3, 4)) url_len = i - 3; strbuf_reset(¬e); if (*what) { if (*kind) strbuf_addf(¬e, "%s ", kind); strbuf_addf(¬e, "'%s' of ", what); } switch (rm->fetch_head_status) { case FETCH_HEAD_NOT_FOR_MERGE: merge_status_marker = "not-for-merge"; /* fall-through */ case FETCH_HEAD_MERGE: fprintf(fp, "%s\t%s\t%s", oid_to_hex(&rm->old_oid), merge_status_marker, note.buf); for (i = 0; i < url_len; ++i) if ('\n' == url[i]) fputs("\\n", fp); else fputc(url[i], fp); fputc('\n', fp); break; default: /* do not write anything to FETCH_HEAD */ break; } strbuf_reset(¬e); if (ref) { rc |= update_local_ref(ref, what, rm, ¬e, summary_width); free(ref); } else format_display(¬e, '*', *kind ? kind : "branch", NULL, *what ? what : "HEAD", "FETCH_HEAD", summary_width); if (note.len) { if (verbosity >= 0 && !shown_url) { fprintf(stderr, _("From %.*s\n"), url_len, url); shown_url = 1; } if (verbosity >= 0) fprintf(stderr, " %s\n", note.buf); } } } if (rc & STORE_REF_ERROR_DF_CONFLICT) error(_("some local refs could not be updated; try running\n" " 'git remote prune %s' to remove any old, conflicting " "branches"), remote_name); if (advice_fetch_show_forced_updates) { if (!fetch_show_forced_updates) { warning(_(warn_show_forced_updates)); } else if (forced_updates_ms > FORCED_UPDATES_DELAY_WARNING_IN_MS) { warning(_(warn_time_show_forced_updates), forced_updates_ms / 1000.0); } } abort: strbuf_release(¬e); free(url); fclose(fp); return rc; } /* * We would want to bypass the object transfer altogether if * everything we are going to fetch already exists and is connected * locally. */ static int check_exist_and_connected(struct ref *ref_map) { struct ref *rm = ref_map; struct check_connected_options opt = CHECK_CONNECTED_INIT; struct ref *r; /* * If we are deepening a shallow clone we already have these * objects reachable. Running rev-list here will return with * a good (0) exit status and we'll bypass the fetch that we * really need to perform. Claiming failure now will ensure * we perform the network exchange to deepen our history. */ if (deepen) return -1; /* * check_connected() allows objects to merely be promised, but * we need all direct targets to exist. */ for (r = rm; r; r = r->next) { if (!has_object_file(&r->old_oid)) return -1; } opt.quiet = 1; return check_connected(iterate_ref_map, &rm, &opt); } static int fetch_refs(struct transport *transport, struct ref *ref_map) { int ret = check_exist_and_connected(ref_map); if (ret) ret = transport_fetch_refs(transport, ref_map); if (!ret) /* * Keep the new pack's ".keep" file around to allow the caller * time to update refs to reference the new objects. */ return 0; transport_unlock_pack(transport); return ret; } /* Update local refs based on the ref values fetched from a remote */ static int consume_refs(struct transport *transport, struct ref *ref_map) { int connectivity_checked = transport->smart_options ? transport->smart_options->connectivity_checked : 0; int ret = store_updated_refs(transport->url, transport->remote->name, connectivity_checked, ref_map); transport_unlock_pack(transport); return ret; } static int prune_refs(struct refspec *rs, struct ref *ref_map, const char *raw_url) { int url_len, i, result = 0; struct ref *ref, *stale_refs = get_stale_heads(rs, ref_map); char *url; int summary_width = transport_summary_width(stale_refs); const char *dangling_msg = dry_run ? _(" (%s will become dangling)") : _(" (%s has become dangling)"); if (raw_url) url = transport_anonymize_url(raw_url); else url = xstrdup("foreign"); url_len = strlen(url); for (i = url_len - 1; url[i] == '/' && 0 <= i; i--) ; url_len = i + 1; if (4 < i && !strncmp(".git", url + i - 3, 4)) url_len = i - 3; if (!dry_run) { struct string_list refnames = STRING_LIST_INIT_NODUP; for (ref = stale_refs; ref; ref = ref->next) string_list_append(&refnames, ref->name); result = delete_refs("fetch: prune", &refnames, 0); string_list_clear(&refnames, 0); } if (verbosity >= 0) { for (ref = stale_refs; ref; ref = ref->next) { struct strbuf sb = STRBUF_INIT; if (!shown_url) { fprintf(stderr, _("From %.*s\n"), url_len, url); shown_url = 1; } format_display(&sb, '-', _("[deleted]"), NULL, _("(none)"), prettify_refname(ref->name), summary_width); fprintf(stderr, " %s\n",sb.buf); strbuf_release(&sb); warn_dangling_symref(stderr, dangling_msg, ref->name); } } free(url); free_refs(stale_refs); return result; } static void check_not_current_branch(struct ref *ref_map) { struct branch *current_branch = branch_get(NULL); if (is_bare_repository() || !current_branch) return; for (; ref_map; ref_map = ref_map->next) if (ref_map->peer_ref && !strcmp(current_branch->refname, ref_map->peer_ref->name)) die(_("Refusing to fetch into current branch %s " "of non-bare repository"), current_branch->refname); } static int truncate_fetch_head(void) { const char *filename = git_path_fetch_head(the_repository); FILE *fp = fopen_for_writing(filename); if (!fp) return error_errno(_("cannot open %s"), filename); fclose(fp); return 0; } static void set_option(struct transport *transport, const char *name, const char *value) { int r = transport_set_option(transport, name, value); if (r < 0) die(_("Option \"%s\" value \"%s\" is not valid for %s"), name, value, transport->url); if (r > 0) warning(_("Option \"%s\" is ignored for %s\n"), name, transport->url); } static int add_oid(const char *refname, const struct object_id *oid, int flags, void *cb_data) { struct oid_array *oids = cb_data; oid_array_append(oids, oid); return 0; } static void add_negotiation_tips(struct git_transport_options *smart_options) { struct oid_array *oids = xcalloc(1, sizeof(*oids)); int i; for (i = 0; i < negotiation_tip.nr; i++) { const char *s = negotiation_tip.items[i].string; int old_nr; if (!has_glob_specials(s)) { struct object_id oid; if (get_oid(s, &oid)) die("%s is not a valid object", s); oid_array_append(oids, &oid); continue; } old_nr = oids->nr; for_each_glob_ref(add_oid, s, oids); if (old_nr == oids->nr) warning("Ignoring --negotiation-tip=%s because it does not match any refs", s); } smart_options->negotiation_tips = oids; } static struct transport *prepare_transport(struct remote *remote, int deepen) { struct transport *transport; transport = transport_get(remote, NULL); transport_set_verbosity(transport, verbosity, progress); transport->family = family; if (upload_pack) set_option(transport, TRANS_OPT_UPLOADPACK, upload_pack); if (keep) set_option(transport, TRANS_OPT_KEEP, "yes"); if (depth) set_option(transport, TRANS_OPT_DEPTH, depth); if (deepen && deepen_since) set_option(transport, TRANS_OPT_DEEPEN_SINCE, deepen_since); if (deepen && deepen_not.nr) set_option(transport, TRANS_OPT_DEEPEN_NOT, (const char *)&deepen_not); if (deepen_relative) set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, "yes"); if (update_shallow) set_option(transport, TRANS_OPT_UPDATE_SHALLOW, "yes"); if (filter_options.choice) { struct strbuf expanded_filter_spec = STRBUF_INIT; expand_list_objects_filter_spec(&filter_options, &expanded_filter_spec); set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, expanded_filter_spec.buf); set_option(transport, TRANS_OPT_FROM_PROMISOR, "1"); strbuf_release(&expanded_filter_spec); } if (negotiation_tip.nr) { if (transport->smart_options) add_negotiation_tips(transport->smart_options); else warning("Ignoring --negotiation-tip because the protocol does not support it."); } return transport; } static void backfill_tags(struct transport *transport, struct ref *ref_map) { int cannot_reuse; /* * Once we have set TRANS_OPT_DEEPEN_SINCE, we can't unset it * when remote helper is used (setting it to an empty string * is not unsetting). We could extend the remote helper * protocol for that, but for now, just force a new connection * without deepen-since. Similar story for deepen-not. */ cannot_reuse = transport->cannot_reuse || deepen_since || deepen_not.nr; if (cannot_reuse) { gsecondary = prepare_transport(transport->remote, 0); transport = gsecondary; } transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, NULL); transport_set_option(transport, TRANS_OPT_DEPTH, "0"); transport_set_option(transport, TRANS_OPT_DEEPEN_RELATIVE, NULL); if (!fetch_refs(transport, ref_map)) consume_refs(transport, ref_map); if (gsecondary) { transport_disconnect(gsecondary); gsecondary = NULL; } } static int do_fetch(struct transport *transport, struct refspec *rs) { struct ref *ref_map; int autotags = (transport->remote->fetch_tags == 1); int retcode = 0; const struct ref *remote_refs; struct argv_array ref_prefixes = ARGV_ARRAY_INIT; int must_list_refs = 1; if (tags == TAGS_DEFAULT) { if (transport->remote->fetch_tags == 2) tags = TAGS_SET; if (transport->remote->fetch_tags == -1) tags = TAGS_UNSET; } /* if not appending, truncate FETCH_HEAD */ if (!append && !dry_run) { retcode = truncate_fetch_head(); if (retcode) goto cleanup; } if (rs->nr) { int i; refspec_ref_prefixes(rs, &ref_prefixes); /* * We can avoid listing refs if all of them are exact * OIDs */ must_list_refs = 0; for (i = 0; i < rs->nr; i++) { if (!rs->items[i].exact_sha1) { must_list_refs = 1; break; } } } else if (transport->remote && transport->remote->fetch.nr) refspec_ref_prefixes(&transport->remote->fetch, &ref_prefixes); if (tags == TAGS_SET || tags == TAGS_DEFAULT) { must_list_refs = 1; if (ref_prefixes.argc) argv_array_push(&ref_prefixes, "refs/tags/"); } if (must_list_refs) remote_refs = transport_get_remote_refs(transport, &ref_prefixes); else remote_refs = NULL; argv_array_clear(&ref_prefixes); ref_map = get_ref_map(transport->remote, remote_refs, rs, tags, &autotags); if (!update_head_ok) check_not_current_branch(ref_map); if (tags == TAGS_DEFAULT && autotags) transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1"); if (prune) { /* * We only prune based on refspecs specified * explicitly (via command line or configuration); we * don't care whether --tags was specified. */ if (rs->nr) { prune_refs(rs, ref_map, transport->url); } else { prune_refs(&transport->remote->fetch, ref_map, transport->url); } } if (fetch_refs(transport, ref_map) || consume_refs(transport, ref_map)) { free_refs(ref_map); retcode = 1; goto cleanup; } free_refs(ref_map); /* if neither --no-tags nor --tags was specified, do automated tag * following ... */ if (tags == TAGS_DEFAULT && autotags) { struct ref **tail = &ref_map; ref_map = NULL; find_non_local_tags(remote_refs, &ref_map, &tail); if (ref_map) backfill_tags(transport, ref_map); free_refs(ref_map); } cleanup: return retcode; } static int get_one_remote_for_fetch(struct remote *remote, void *priv) { struct string_list *list = priv; if (!remote->skip_default_update) string_list_append(list, remote->name); return 0; } struct remote_group_data { const char *name; struct string_list *list; }; static int get_remote_group(const char *key, const char *value, void *priv) { struct remote_group_data *g = priv; if (skip_prefix(key, "remotes.", &key) && !strcmp(key, g->name)) { /* split list by white space */ while (*value) { size_t wordlen = strcspn(value, " \t\n"); if (wordlen >= 1) string_list_append_nodup(g->list, xstrndup(value, wordlen)); value += wordlen + (value[wordlen] != '\0'); } } return 0; } static int add_remote_or_group(const char *name, struct string_list *list) { int prev_nr = list->nr; struct remote_group_data g; g.name = name; g.list = list; git_config(get_remote_group, &g); if (list->nr == prev_nr) { struct remote *remote = remote_get(name); if (!remote_is_configured(remote, 0)) return 0; string_list_append(list, remote->name); } return 1; } static void add_options_to_argv(struct argv_array *argv) { if (dry_run) argv_array_push(argv, "--dry-run"); if (prune != -1) argv_array_push(argv, prune ? "--prune" : "--no-prune"); if (prune_tags != -1) argv_array_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags"); if (update_head_ok) argv_array_push(argv, "--update-head-ok"); if (force) argv_array_push(argv, "--force"); if (keep) argv_array_push(argv, "--keep"); if (recurse_submodules == RECURSE_SUBMODULES_ON) argv_array_push(argv, "--recurse-submodules"); else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND) argv_array_push(argv, "--recurse-submodules=on-demand"); if (tags == TAGS_SET) argv_array_push(argv, "--tags"); else if (tags == TAGS_UNSET) argv_array_push(argv, "--no-tags"); if (verbosity >= 2) argv_array_push(argv, "-v"); if (verbosity >= 1) argv_array_push(argv, "-v"); else if (verbosity < 0) argv_array_push(argv, "-q"); } static int fetch_multiple(struct string_list *list) { int i, result = 0; struct argv_array argv = ARGV_ARRAY_INIT; if (!append && !dry_run) { int errcode = truncate_fetch_head(); if (errcode) return errcode; } argv_array_pushl(&argv, "fetch", "--append", "--no-auto-gc", NULL); add_options_to_argv(&argv); for (i = 0; i < list->nr; i++) { const char *name = list->items[i].string; argv_array_push(&argv, name); if (verbosity >= 0) printf(_("Fetching %s\n"), name); if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) { error(_("Could not fetch %s"), name); result = 1; } argv_array_pop(&argv); } argv_array_clear(&argv); return result; } /* * Fetching from the promisor remote should use the given filter-spec * or inherit the default filter-spec from the config. */ static inline void fetch_one_setup_partial(struct remote *remote) { /* * Explicit --no-filter argument overrides everything, regardless * of any prior partial clones and fetches. */ if (filter_options.no_filter) return; /* * If no prior partial clone/fetch and the current fetch DID NOT * request a partial-fetch, do a normal fetch. */ if (!repository_format_partial_clone && !filter_options.choice) return; /* * If this is the FIRST partial-fetch request, we enable partial * on this repo and remember the given filter-spec as the default * for subsequent fetches to this remote. */ if (!repository_format_partial_clone && filter_options.choice) { partial_clone_register(remote->name, &filter_options); return; } /* * We are currently limited to only ONE promisor remote and only * allow partial-fetches from the promisor remote. */ if (strcmp(remote->name, repository_format_partial_clone)) { if (filter_options.choice) die(_("--filter can only be used with the remote " "configured in extensions.partialClone")); return; } /* * Do a partial-fetch from the promisor remote using either the * explicitly given filter-spec or inherit the filter-spec from * the config. */ if (!filter_options.choice) partial_clone_get_default_filter_spec(&filter_options); return; } static int fetch_one(struct remote *remote, int argc, const char **argv, int prune_tags_ok) { struct refspec rs = REFSPEC_INIT_FETCH; int i; int exit_code; int maybe_prune_tags; int remote_via_config = remote_is_configured(remote, 0); if (!remote) die(_("No remote repository specified. Please, specify either a URL or a\n" "remote name from which new revisions should be fetched.")); gtransport = prepare_transport(remote, 1); if (prune < 0) { /* no command line request */ if (0 <= remote->prune) prune = remote->prune; else if (0 <= fetch_prune_config) prune = fetch_prune_config; else prune = PRUNE_BY_DEFAULT; } if (prune_tags < 0) { /* no command line request */ if (0 <= remote->prune_tags) prune_tags = remote->prune_tags; else if (0 <= fetch_prune_tags_config) prune_tags = fetch_prune_tags_config; else prune_tags = PRUNE_TAGS_BY_DEFAULT; } maybe_prune_tags = prune_tags_ok && prune_tags; if (maybe_prune_tags && remote_via_config) refspec_append(&remote->fetch, TAG_REFSPEC); if (maybe_prune_tags && (argc || !remote_via_config)) refspec_append(&rs, TAG_REFSPEC); for (i = 0; i < argc; i++) { if (!strcmp(argv[i], "tag")) { char *tag; i++; if (i >= argc) die(_("You need to specify a tag name.")); tag = xstrfmt("refs/tags/%s:refs/tags/%s", argv[i], argv[i]); refspec_append(&rs, tag); free(tag); } else { refspec_append(&rs, argv[i]); } } if (server_options.nr) gtransport->server_options = &server_options; sigchain_push_common(unlock_pack_on_signal); atexit(unlock_pack); sigchain_push(SIGPIPE, SIG_IGN); exit_code = do_fetch(gtransport, &rs); sigchain_pop(SIGPIPE); refspec_clear(&rs); transport_disconnect(gtransport); gtransport = NULL; return exit_code; } int cmd_fetch(int argc, const char **argv, const char *prefix) { int i; struct string_list list = STRING_LIST_INIT_DUP; struct remote *remote = NULL; int result = 0; int prune_tags_ok = 1; struct argv_array argv_gc_auto = ARGV_ARRAY_INIT; packet_trace_identity("fetch"); fetch_if_missing = 0; /* Record the command line for the reflog */ strbuf_addstr(&default_rla, "fetch"); for (i = 1; i < argc; i++) strbuf_addf(&default_rla, " %s", argv[i]); fetch_config_from_gitmodules(&max_children, &recurse_submodules); git_config(git_fetch_config, NULL); argc = parse_options(argc, argv, prefix, builtin_fetch_options, builtin_fetch_usage, 0); if (deepen_relative) { if (deepen_relative < 0) die(_("Negative depth in --deepen is not supported")); if (depth) die(_("--deepen and --depth are mutually exclusive")); depth = xstrfmt("%d", deepen_relative); } if (unshallow) { if (depth) die(_("--depth and --unshallow cannot be used together")); else if (!is_repository_shallow(the_repository)) die(_("--unshallow on a complete repository does not make sense")); else depth = xstrfmt("%d", INFINITE_DEPTH); } /* no need to be strict, transport_set_option() will validate it again */ if (depth && atoi(depth) < 1) die(_("depth %s is not a positive number"), depth); if (depth || deepen_since || deepen_not.nr) deepen = 1; if (filter_options.choice && !repository_format_partial_clone) die("--filter can only be used when extensions.partialClone is set"); if (all) { if (argc == 1) die(_("fetch --all does not take a repository argument")); else if (argc > 1) die(_("fetch --all does not make sense with refspecs")); (void) for_each_remote(get_one_remote_for_fetch, &list); } else if (argc == 0) { /* No arguments -- use default remote */ remote = remote_get(NULL); } else if (multiple) { /* All arguments are assumed to be remotes or groups */ for (i = 0; i < argc; i++) if (!add_remote_or_group(argv[i], &list)) die(_("No such remote or remote group: %s"), argv[i]); } else { /* Single remote or group */ (void) add_remote_or_group(argv[0], &list); if (list.nr > 1) { /* More than one remote */ if (argc > 1) die(_("Fetching a group and specifying refspecs does not make sense")); } else { /* Zero or one remotes */ remote = remote_get(argv[0]); prune_tags_ok = (argc == 1); argc--; argv++; } } if (remote) { if (filter_options.choice || repository_format_partial_clone) fetch_one_setup_partial(remote); result = fetch_one(remote, argc, argv, prune_tags_ok); } else { if (filter_options.choice) die(_("--filter can only be used with the remote " "configured in extensions.partialclone")); /* TODO should this also die if we have a previous partial-clone? */ result = fetch_multiple(&list); } if (!result && (recurse_submodules != RECURSE_SUBMODULES_OFF)) { struct argv_array options = ARGV_ARRAY_INIT; add_options_to_argv(&options); result = fetch_populated_submodules(the_repository, &options, submodule_prefix, recurse_submodules, recurse_submodules_default, verbosity < 0, max_children); argv_array_clear(&options); } string_list_clear(&list, 0); close_object_store(the_repository->objects); if (enable_auto_gc) { argv_array_pushl(&argv_gc_auto, "gc", "--auto", NULL); if (verbosity < 0) argv_array_push(&argv_gc_auto, "--quiet"); run_command_v_opt(argv_gc_auto.argv, RUN_GIT_CMD); argv_array_clear(&argv_gc_auto); } return result; }