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-rw-r--r--builtin/fetch.c2359
1 files changed, 2359 insertions, 0 deletions
diff --git a/builtin/fetch.c b/builtin/fetch.c
new file mode 100644
index 0000000..7378caf
--- /dev/null
+++ b/builtin/fetch.c
@@ -0,0 +1,2359 @@
+/*
+ * "git fetch"
+ */
+#include "cache.h"
+#include "config.h"
+#include "repository.h"
+#include "refs.h"
+#include "refspec.h"
+#include "object-store.h"
+#include "oidset.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 "strvec.h"
+#include "utf8.h"
+#include "packfile.h"
+#include "list-objects-filter-options.h"
+#include "commit-reach.h"
+#include "branch.h"
+#include "promisor-remote.h"
+#include "commit-graph.h"
+#include "shallow.h"
+#include "worktree.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 prefetch = 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;
+static int write_fetch_head = 1;
+static int verbosity, deepen_relative, set_upstream, refetch;
+static int progress = -1;
+static int enable_auto_gc = 1;
+static int tags = TAGS_DEFAULT, unshallow, update_shallow, deepen;
+static int max_jobs = -1, submodule_fetch_jobs_config = -1;
+static int fetch_parallel_config = 1;
+static int atomic_fetch;
+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_cli = 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 = LIST_OBJECTS_FILTER_INIT;
+static struct string_list server_options = STRING_LIST_INIT_DUP;
+static struct string_list negotiation_tip = STRING_LIST_INIT_NODUP;
+static int fetch_write_commit_graph = -1;
+static int stdin_refspecs = 0;
+static int negotiate_only;
+
+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")) {
+ submodule_fetch_jobs_config = parse_submodule_fetchjobs(k, v);
+ return 0;
+ } else if (!strcmp(k, "fetch.recursesubmodules")) {
+ recurse_submodules = parse_fetch_recurse_submodules_arg(k, v);
+ return 0;
+ }
+
+ if (!strcmp(k, "fetch.parallel")) {
+ fetch_parallel_config = git_config_int(k, v);
+ if (fetch_parallel_config < 0)
+ die(_("fetch.parallel cannot be negative"));
+ if (!fetch_parallel_config)
+ fetch_parallel_config = online_cpus();
+ 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(0, "set-upstream", &set_upstream,
+ N_("set upstream for git pull/fetch")),
+ OPT_BOOL('a', "append", &append,
+ N_("append to .git/FETCH_HEAD instead of overwriting")),
+ OPT_BOOL(0, "atomic", &atomic_fetch,
+ N_("use atomic transaction to update references")),
+ 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_jobs,
+ N_("number of submodules fetched in parallel")),
+ OPT_BOOL(0, "prefetch", &prefetch,
+ N_("modify the refspec to place all refs within refs/prefetch/")),
+ 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")),
+ OPT_CALLBACK_F(0, "recurse-submodules", &recurse_submodules_cli, 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(0, "write-fetch-head", &write_fetch_head,
+ N_("write fetched references to the FETCH_HEAD file")),
+ 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),
+ OPT_SET_INT_F(0, "refetch", &refetch,
+ N_("re-fetch without negotiating common commits"),
+ 1, PARSE_OPT_NONEG),
+ { OPTION_STRING, 0, "submodule-prefix", &submodule_prefix, N_("dir"),
+ N_("prepend this to submodule path output"), PARSE_OPT_HIDDEN },
+ OPT_CALLBACK_F(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")),
+ OPT_CALLBACK_F(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_BOOL(0, "negotiate-only", &negotiate_only,
+ N_("do not fetch a packfile; instead, print ancestors of negotiation tips")),
+ OPT_PARSE_LIST_OBJECTS_FILTER(&filter_options),
+ OPT_BOOL(0, "auto-maintenance", &enable_auto_gc,
+ N_("run 'maintenance --auto' after fetching")),
+ OPT_BOOL(0, "auto-gc", &enable_auto_gc,
+ N_("run 'maintenance --auto' after fetching")),
+ OPT_BOOL(0, "show-forced-updates", &fetch_show_forced_updates,
+ N_("check for forced-updates on all updated branches")),
+ OPT_BOOL(0, "write-commit-graph", &fetch_write_commit_graph,
+ N_("write the commit-graph after fetching")),
+ OPT_BOOL(0, "stdin", &stdin_refspecs,
+ N_("accept refspecs from stdin")),
+ OPT_END()
+};
+
+static void unlock_pack(unsigned int flags)
+{
+ if (gtransport)
+ transport_unlock_pack(gtransport, flags);
+ if (gsecondary)
+ transport_unlock_pack(gsecondary, flags);
+}
+
+static void unlock_pack_atexit(void)
+{
+ unlock_pack(0);
+}
+
+static void unlock_pack_on_signal(int signo)
+{
+ unlock_pack(TRANSPORT_UNLOCK_PACK_IN_SIGNAL_HANDLER);
+ 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 void create_fetch_oidset(struct ref **head, struct oidset *out)
+{
+ struct ref *rm = *head;
+ while (rm) {
+ oidset_insert(out, &rm->old_oid);
+ rm = rm->next;
+ }
+}
+
+struct refname_hash_entry {
+ struct hashmap_entry ent;
+ struct object_id oid;
+ int ignore;
+ char refname[FLEX_ARRAY];
+};
+
+static int refname_hash_entry_cmp(const void *hashmap_cmp_fn_data UNUSED,
+ const struct hashmap_entry *eptr,
+ const struct hashmap_entry *entry_or_key,
+ const void *keydata)
+{
+ const struct refname_hash_entry *e1, *e2;
+
+ e1 = container_of(eptr, const struct refname_hash_entry, ent);
+ e2 = container_of(entry_or_key, const struct refname_hash_entry, ent);
+ 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 UNUSED, 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 add_already_queued_tags(const char *refname,
+ const struct object_id *old_oid,
+ const struct object_id *new_oid,
+ void *cb_data)
+{
+ struct hashmap *queued_tags = cb_data;
+ if (starts_with(refname, "refs/tags/") && new_oid)
+ (void) refname_hash_add(queued_tags, refname, new_oid);
+}
+
+static void find_non_local_tags(const struct ref *refs,
+ struct ref_transaction *transaction,
+ struct ref **head,
+ struct ref ***tail)
+{
+ struct hashmap existing_refs;
+ struct hashmap remote_refs;
+ struct oidset fetch_oids = OIDSET_INIT;
+ 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;
+ const int quick_flags = OBJECT_INFO_QUICK | OBJECT_INFO_SKIP_FETCH_OBJECT;
+
+ refname_hash_init(&existing_refs);
+ refname_hash_init(&remote_refs);
+ create_fetch_oidset(head, &fetch_oids);
+
+ for_each_ref(add_one_refname, &existing_refs);
+
+ /*
+ * If we already have a transaction, then we need to filter out all
+ * tags which have already been queued up.
+ */
+ if (transaction)
+ ref_transaction_for_each_queued_update(transaction,
+ add_already_queued_tags,
+ &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, quick_flags) &&
+ !oidset_contains(&fetch_oids, &ref->old_oid) &&
+ !has_object_file_with_flags(&item->oid, quick_flags) &&
+ !oidset_contains(&fetch_oids, &item->oid))
+ 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, quick_flags) &&
+ !oidset_contains(&fetch_oids, &item->oid))
+ 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_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
+
+ /*
+ * 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, quick_flags) &&
+ !oidset_contains(&fetch_oids, &item->oid))
+ 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_clear_and_free(&remote_refs, struct refname_hash_entry, ent);
+ string_list_clear(&remote_refs_list, 0);
+ oidset_clear(&fetch_oids);
+}
+
+static void filter_prefetch_refspec(struct refspec *rs)
+{
+ int i;
+
+ if (!prefetch)
+ return;
+
+ for (i = 0; i < rs->nr; i++) {
+ struct strbuf new_dst = STRBUF_INIT;
+ char *old_dst;
+ const char *sub = NULL;
+
+ if (rs->items[i].negative)
+ continue;
+ if (!rs->items[i].dst ||
+ (rs->items[i].src &&
+ !strncmp(rs->items[i].src,
+ ref_namespace[NAMESPACE_TAGS].ref,
+ strlen(ref_namespace[NAMESPACE_TAGS].ref)))) {
+ int j;
+
+ free(rs->items[i].src);
+ free(rs->items[i].dst);
+
+ for (j = i + 1; j < rs->nr; j++) {
+ rs->items[j - 1] = rs->items[j];
+ rs->raw[j - 1] = rs->raw[j];
+ }
+ rs->nr--;
+ i--;
+ continue;
+ }
+
+ old_dst = rs->items[i].dst;
+ strbuf_addstr(&new_dst, ref_namespace[NAMESPACE_PREFETCH].ref);
+
+ /*
+ * If old_dst starts with "refs/", then place
+ * sub after that prefix. Otherwise, start at
+ * the beginning of the string.
+ */
+ if (!skip_prefix(old_dst, "refs/", &sub))
+ sub = old_dst;
+ strbuf_addstr(&new_dst, sub);
+
+ rs->items[i].dst = strbuf_detach(&new_dst, NULL);
+ rs->items[i].force = 1;
+
+ free(old_dst);
+ }
+}
+
+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;
+ int existing_refs_populated = 0;
+
+ filter_prefetch_refspec(rs);
+ if (remote)
+ filter_prefetch_refspec(&remote->fetch);
+
+ 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 if (!prefetch) {
+ 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, NULL, &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;
+ }
+
+ /*
+ * apply negative refspecs first, before we remove duplicates. This is
+ * necessary as negative refspecs might remove an otherwise conflicting
+ * duplicate.
+ */
+ if (rs->nr)
+ ref_map = apply_negative_refspecs(ref_map, rs);
+ else
+ ref_map = apply_negative_refspecs(ref_map, &remote->fetch);
+
+ ref_map = ref_remove_duplicates(ref_map);
+
+ 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);
+
+ if (!existing_refs_populated) {
+ refname_hash_init(&existing_refs);
+ for_each_ref(add_one_refname, &existing_refs);
+ existing_refs_populated = 1;
+ }
+
+ 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);
+ }
+ }
+ }
+ if (existing_refs_populated)
+ hashmap_clear_and_free(&existing_refs, struct refname_hash_entry, ent);
+
+ 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,
+ struct ref_transaction *transaction,
+ int check_old)
+{
+ char *msg;
+ char *rla = getenv("GIT_REFLOG_ACTION");
+ struct ref_transaction *our_transaction = NULL;
+ struct strbuf err = STRBUF_INIT;
+ int ret;
+
+ if (dry_run)
+ return 0;
+ if (!rla)
+ rla = default_rla.buf;
+ msg = xstrfmt("%s: %s", rla, action);
+
+ /*
+ * If no transaction was passed to us, we manage the transaction
+ * ourselves. Otherwise, we trust the caller to handle the transaction
+ * lifecycle.
+ */
+ if (!transaction) {
+ transaction = our_transaction = ref_transaction_begin(&err);
+ if (!transaction) {
+ ret = STORE_REF_ERROR_OTHER;
+ goto out;
+ }
+ }
+
+ ret = ref_transaction_update(transaction, ref->name, &ref->new_oid,
+ check_old ? &ref->old_oid : NULL,
+ 0, msg, &err);
+ if (ret) {
+ ret = STORE_REF_ERROR_OTHER;
+ goto out;
+ }
+
+ if (our_transaction) {
+ switch (ref_transaction_commit(our_transaction, &err)) {
+ case 0:
+ break;
+ case TRANSACTION_NAME_CONFLICT:
+ ret = STORE_REF_ERROR_DF_CONFLICT;
+ goto out;
+ default:
+ ret = STORE_REF_ERROR_OTHER;
+ goto out;
+ }
+ }
+
+out:
+ ref_transaction_free(our_transaction);
+ if (ret)
+ error("%s", err.buf);
+ strbuf_release(&err);
+ free(msg);
+ return ret;
+}
+
+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 <= 0 && 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";
+
+ if (verbosity < 0)
+ return;
+
+ git_config_get_string_tmp("fetch.output", &format);
+ if (!strcasecmp(format, "full"))
+ compact_format = 0;
+ else if (!strcasecmp(format, "compact"))
+ compact_format = 1;
+ else
+ die(_("invalid value for '%s': '%s'"),
+ "fetch.output", 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;
+
+ if (verbosity < 0)
+ return;
+
+ 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,
+ struct ref_transaction *transaction,
+ const char *remote, const struct ref *remote_ref,
+ struct strbuf *display, int summary_width)
+{
+ struct commit *current = NULL, *updated;
+ const char *pretty_ref = prettify_refname(ref->name);
+ int fast_forward = 0;
+
+ if (!repo_has_object_file(the_repository, &ref->new_oid))
+ 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 (!update_head_ok &&
+ !is_null_oid(&ref->old_oid) &&
+ branch_checked_out(ref->name)) {
+ /*
+ * 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 into checked-out 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, transaction, 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, transaction, 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, &current->object.oid, DEFAULT_ABBREV);
+ strbuf_addstr(&quickref, "..");
+ strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
+ r = s_update_ref("fast-forward", ref, transaction, 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, &current->object.oid, DEFAULT_ABBREV);
+ strbuf_addstr(&quickref, "...");
+ strbuf_add_unique_abbrev(&quickref, &ref->new_oid, DEFAULT_ABBREV);
+ r = s_update_ref("forced-update", ref, transaction, 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 const struct object_id *iterate_ref_map(void *cb_data)
+{
+ struct ref **rm = cb_data;
+ struct ref *ref = *rm;
+
+ while (ref && ref->status == REF_STATUS_REJECT_SHALLOW)
+ ref = ref->next;
+ if (!ref)
+ return NULL;
+ *rm = ref->next;
+ return &ref->old_oid;
+}
+
+struct fetch_head {
+ FILE *fp;
+ struct strbuf buf;
+};
+
+static int open_fetch_head(struct fetch_head *fetch_head)
+{
+ const char *filename = git_path_fetch_head(the_repository);
+
+ if (write_fetch_head) {
+ fetch_head->fp = fopen(filename, "a");
+ if (!fetch_head->fp)
+ return error_errno(_("cannot open '%s'"), filename);
+ strbuf_init(&fetch_head->buf, 0);
+ } else {
+ fetch_head->fp = NULL;
+ }
+
+ return 0;
+}
+
+static void append_fetch_head(struct fetch_head *fetch_head,
+ const struct object_id *old_oid,
+ enum fetch_head_status fetch_head_status,
+ const char *note,
+ const char *url, size_t url_len)
+{
+ char old_oid_hex[GIT_MAX_HEXSZ + 1];
+ const char *merge_status_marker;
+ size_t i;
+
+ if (!fetch_head->fp)
+ return;
+
+ switch (fetch_head_status) {
+ case FETCH_HEAD_NOT_FOR_MERGE:
+ merge_status_marker = "not-for-merge";
+ break;
+ case FETCH_HEAD_MERGE:
+ merge_status_marker = "";
+ break;
+ default:
+ /* do not write anything to FETCH_HEAD */
+ return;
+ }
+
+ strbuf_addf(&fetch_head->buf, "%s\t%s\t%s",
+ oid_to_hex_r(old_oid_hex, old_oid), merge_status_marker, note);
+ for (i = 0; i < url_len; ++i)
+ if ('\n' == url[i])
+ strbuf_addstr(&fetch_head->buf, "\\n");
+ else
+ strbuf_addch(&fetch_head->buf, url[i]);
+ strbuf_addch(&fetch_head->buf, '\n');
+
+ /*
+ * When using an atomic fetch, we do not want to update FETCH_HEAD if
+ * any of the reference updates fails. We thus have to write all
+ * updates to a buffer first and only commit it as soon as all
+ * references have been successfully updated.
+ */
+ if (!atomic_fetch) {
+ strbuf_write(&fetch_head->buf, fetch_head->fp);
+ strbuf_reset(&fetch_head->buf);
+ }
+}
+
+static void commit_fetch_head(struct fetch_head *fetch_head)
+{
+ if (!fetch_head->fp || !atomic_fetch)
+ return;
+ strbuf_write(&fetch_head->buf, fetch_head->fp);
+}
+
+static void close_fetch_head(struct fetch_head *fetch_head)
+{
+ if (!fetch_head->fp)
+ return;
+
+ fclose(fetch_head->fp);
+ strbuf_release(&fetch_head->buf);
+}
+
+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_transaction *transaction, struct ref *ref_map,
+ struct fetch_head *fetch_head)
+{
+ int url_len, i, rc = 0;
+ struct strbuf note = STRBUF_INIT;
+ const char *what, *kind;
+ struct ref *rm;
+ char *url;
+ int want_status;
+ int summary_width = 0;
+
+ if (verbosity >= 0)
+ summary_width = transport_summary_width(ref_map);
+
+ if (raw_url)
+ url = transport_anonymize_url(raw_url);
+ else
+ url = xstrdup("foreign");
+
+ if (!connectivity_checked) {
+ struct check_connected_options opt = CHECK_CONNECTED_INIT;
+
+ rm = ref_map;
+ if (check_connected(iterate_ref_map, &rm, &opt)) {
+ 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;
+
+ if (rm->status == REF_STATUS_REJECT_SHALLOW) {
+ if (want_status == FETCH_HEAD_MERGE)
+ warning(_("rejected %s because shallow roots are not allowed to be updated"),
+ rm->peer_ref ? rm->peer_ref->name : rm->name);
+ continue;
+ }
+
+ /*
+ * When writing FETCH_HEAD we need to determine whether
+ * we already have the commit or not. If not, then the
+ * reference is not for merge and needs to be written
+ * to the reflog after other commits which we already
+ * have. We're not interested in this property though
+ * in case FETCH_HEAD is not to be updated, so we can
+ * skip the classification in that case.
+ */
+ if (fetch_head->fp) {
+ struct commit *commit = NULL;
+
+ /*
+ * References in "refs/tags/" are often going to point
+ * to annotated tags, which are not part of the
+ * commit-graph. We thus only try to look up refs in
+ * the graph which are not in that namespace to not
+ * regress performance in repositories with many
+ * annotated tags.
+ */
+ if (!starts_with(rm->name, "refs/tags/"))
+ commit = lookup_commit_in_graph(the_repository, &rm->old_oid);
+ if (!commit) {
+ 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 &&
+ (!rm->peer_ref || !oideq(&ref->old_oid, &ref->new_oid))) {
+ check_for_new_submodule_commits(&rm->old_oid);
+ }
+
+ if (!strcmp(rm->name, "HEAD")) {
+ kind = "";
+ what = "";
+ }
+ else if (skip_prefix(rm->name, "refs/heads/", &what))
+ kind = "branch";
+ else if (skip_prefix(rm->name, "refs/tags/", &what))
+ kind = "tag";
+ else if (skip_prefix(rm->name, "refs/remotes/", &what))
+ kind = "remote-tracking branch";
+ 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(&note);
+ if (*what) {
+ if (*kind)
+ strbuf_addf(&note, "%s ", kind);
+ strbuf_addf(&note, "'%s' of ", what);
+ }
+
+ append_fetch_head(fetch_head, &rm->old_oid,
+ rm->fetch_head_status,
+ note.buf, url, url_len);
+
+ strbuf_reset(&note);
+ if (ref) {
+ rc |= update_local_ref(ref, transaction, what,
+ rm, &note, summary_width);
+ free(ref);
+ } else if (write_fetch_head || dry_run) {
+ /*
+ * Display fetches written to FETCH_HEAD (or
+ * would be written to FETCH_HEAD, if --dry-run
+ * is set).
+ */
+ format_display(&note, '*',
+ *kind ? kind : "branch", NULL,
+ *what ? what : "HEAD",
+ "FETCH_HEAD", summary_width);
+ }
+ if (note.len) {
+ if (!shown_url) {
+ fprintf(stderr, _("From %.*s\n"),
+ url_len, url);
+ shown_url = 1;
+ }
+ 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_enabled(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(&note);
+ free(url);
+ 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;
+
+ /*
+ * Similarly, if we need to refetch, we always want to perform a full
+ * fetch ignoring existing objects.
+ */
+ if (refetch)
+ 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_with_flags(&r->old_oid,
+ OBJECT_INFO_SKIP_FETCH_OBJECT))
+ return -1;
+ }
+
+ opt.quiet = 1;
+ return check_connected(iterate_ref_map, &rm, &opt);
+}
+
+static int fetch_and_consume_refs(struct transport *transport,
+ struct ref_transaction *transaction,
+ struct ref *ref_map,
+ struct fetch_head *fetch_head)
+{
+ int connectivity_checked = 1;
+ int ret;
+
+ /*
+ * We don't need to perform a fetch in case we can already satisfy all
+ * refs.
+ */
+ ret = check_exist_and_connected(ref_map);
+ if (ret) {
+ trace2_region_enter("fetch", "fetch_refs", the_repository);
+ ret = transport_fetch_refs(transport, ref_map);
+ trace2_region_leave("fetch", "fetch_refs", the_repository);
+ if (ret)
+ goto out;
+ connectivity_checked = transport->smart_options ?
+ transport->smart_options->connectivity_checked : 0;
+ }
+
+ trace2_region_enter("fetch", "consume_refs", the_repository);
+ ret = store_updated_refs(transport->url, transport->remote->name,
+ connectivity_checked, transaction, ref_map,
+ fetch_head);
+ trace2_region_leave("fetch", "consume_refs", the_repository);
+
+out:
+ transport_unlock_pack(transport, 0);
+ return ret;
+}
+
+static int prune_refs(struct refspec *rs,
+ struct ref_transaction *transaction,
+ 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);
+ struct strbuf err = STRBUF_INIT;
+ char *url;
+ 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) {
+ if (transaction) {
+ for (ref = stale_refs; ref; ref = ref->next) {
+ result = ref_transaction_delete(transaction, ref->name, NULL, 0,
+ "fetch: prune", &err);
+ if (result)
+ goto cleanup;
+ }
+ } else {
+ 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) {
+ int summary_width = transport_summary_width(stale_refs);
+
+ 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);
+ }
+ }
+
+cleanup:
+ strbuf_release(&err);
+ free(url);
+ free_refs(stale_refs);
+ return result;
+}
+
+static void check_not_current_branch(struct ref *ref_map)
+{
+ const char *path;
+ for (; ref_map; ref_map = ref_map->next)
+ if (ref_map->peer_ref &&
+ starts_with(ref_map->peer_ref->name, "refs/heads/") &&
+ (path = branch_checked_out(ref_map->peer_ref->name)))
+ die(_("refusing to fetch into branch '%s' "
+ "checked out at '%s'"),
+ ref_map->peer_ref->name, path);
+}
+
+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 UNUSED,
+ const struct object_id *oid,
+ int flags UNUSED, 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);
+ if (!has_object(the_repository, &oid, 0))
+ die(_("the object %s does not exist"), 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 (refetch)
+ set_option(transport, TRANS_OPT_REFETCH, "yes");
+ if (filter_options.choice) {
+ const char *spec =
+ expand_list_objects_filter_spec(&filter_options);
+ set_option(transport, TRANS_OPT_LIST_OBJECTS_FILTER, spec);
+ set_option(transport, TRANS_OPT_FROM_PROMISOR, "1");
+ }
+ 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 int backfill_tags(struct transport *transport,
+ struct ref_transaction *transaction,
+ struct ref *ref_map,
+ struct fetch_head *fetch_head)
+{
+ int retcode, 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);
+ retcode = fetch_and_consume_refs(transport, transaction, ref_map, fetch_head);
+
+ if (gsecondary) {
+ transport_disconnect(gsecondary);
+ gsecondary = NULL;
+ }
+
+ return retcode;
+}
+
+static int do_fetch(struct transport *transport,
+ struct refspec *rs)
+{
+ struct ref_transaction *transaction = NULL;
+ struct ref *ref_map = NULL;
+ int autotags = (transport->remote->fetch_tags == 1);
+ int retcode = 0;
+ const struct ref *remote_refs;
+ struct transport_ls_refs_options transport_ls_refs_options =
+ TRANSPORT_LS_REFS_OPTIONS_INIT;
+ int must_list_refs = 1;
+ struct fetch_head fetch_head = { 0 };
+ struct strbuf err = STRBUF_INIT;
+
+ 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 && write_fetch_head) {
+ retcode = truncate_fetch_head();
+ if (retcode)
+ goto cleanup;
+ }
+
+ if (rs->nr) {
+ int i;
+
+ refspec_ref_prefixes(rs, &transport_ls_refs_options.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 {
+ struct branch *branch = branch_get(NULL);
+
+ if (transport->remote->fetch.nr)
+ refspec_ref_prefixes(&transport->remote->fetch,
+ &transport_ls_refs_options.ref_prefixes);
+ if (branch_has_merge_config(branch) &&
+ !strcmp(branch->remote_name, transport->remote->name)) {
+ int i;
+ for (i = 0; i < branch->merge_nr; i++) {
+ strvec_push(&transport_ls_refs_options.ref_prefixes,
+ branch->merge[i]->src);
+ }
+ }
+ }
+
+ if (tags == TAGS_SET || tags == TAGS_DEFAULT) {
+ must_list_refs = 1;
+ if (transport_ls_refs_options.ref_prefixes.nr)
+ strvec_push(&transport_ls_refs_options.ref_prefixes,
+ "refs/tags/");
+ }
+
+ if (must_list_refs) {
+ trace2_region_enter("fetch", "remote_refs", the_repository);
+ remote_refs = transport_get_remote_refs(transport,
+ &transport_ls_refs_options);
+ trace2_region_leave("fetch", "remote_refs", the_repository);
+ } else
+ remote_refs = NULL;
+
+ transport_ls_refs_options_release(&transport_ls_refs_options);
+
+ ref_map = get_ref_map(transport->remote, remote_refs, rs,
+ tags, &autotags);
+ if (!update_head_ok)
+ check_not_current_branch(ref_map);
+
+ retcode = open_fetch_head(&fetch_head);
+ if (retcode)
+ goto cleanup;
+
+ if (atomic_fetch) {
+ transaction = ref_transaction_begin(&err);
+ if (!transaction) {
+ retcode = error("%s", err.buf);
+ goto cleanup;
+ }
+ }
+
+ 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) {
+ retcode = prune_refs(rs, transaction, ref_map, transport->url);
+ } else {
+ retcode = prune_refs(&transport->remote->fetch,
+ transaction, ref_map,
+ transport->url);
+ }
+ if (retcode != 0)
+ retcode = 1;
+ }
+
+ if (fetch_and_consume_refs(transport, transaction, ref_map, &fetch_head)) {
+ retcode = 1;
+ goto cleanup;
+ }
+
+ /*
+ * If neither --no-tags nor --tags was specified, do automated tag
+ * following.
+ */
+ if (tags == TAGS_DEFAULT && autotags) {
+ struct ref *tags_ref_map = NULL, **tail = &tags_ref_map;
+
+ find_non_local_tags(remote_refs, transaction, &tags_ref_map, &tail);
+ if (tags_ref_map) {
+ /*
+ * If backfilling of tags fails then we want to tell
+ * the user so, but we have to continue regardless to
+ * populate upstream information of the references we
+ * have already fetched above. The exception though is
+ * when `--atomic` is passed: in that case we'll abort
+ * the transaction and don't commit anything.
+ */
+ if (backfill_tags(transport, transaction, tags_ref_map,
+ &fetch_head))
+ retcode = 1;
+ }
+
+ free_refs(tags_ref_map);
+ }
+
+ if (transaction) {
+ if (retcode)
+ goto cleanup;
+
+ retcode = ref_transaction_commit(transaction, &err);
+ if (retcode) {
+ error("%s", err.buf);
+ ref_transaction_free(transaction);
+ transaction = NULL;
+ goto cleanup;
+ }
+ }
+
+ commit_fetch_head(&fetch_head);
+
+ if (set_upstream) {
+ struct branch *branch = branch_get("HEAD");
+ struct ref *rm;
+ struct ref *source_ref = NULL;
+
+ /*
+ * We're setting the upstream configuration for the
+ * current branch. The relevant upstream is the
+ * fetched branch that is meant to be merged with the
+ * current one, i.e. the one fetched to FETCH_HEAD.
+ *
+ * When there are several such branches, consider the
+ * request ambiguous and err on the safe side by doing
+ * nothing and just emit a warning.
+ */
+ for (rm = ref_map; rm; rm = rm->next) {
+ if (!rm->peer_ref) {
+ if (source_ref) {
+ warning(_("multiple branches detected, incompatible with --set-upstream"));
+ goto cleanup;
+ } else {
+ source_ref = rm;
+ }
+ }
+ }
+ if (source_ref) {
+ if (!branch) {
+ const char *shortname = source_ref->name;
+ skip_prefix(shortname, "refs/heads/", &shortname);
+
+ warning(_("could not set upstream of HEAD to '%s' from '%s' when "
+ "it does not point to any branch."),
+ shortname, transport->remote->name);
+ goto cleanup;
+ }
+
+ if (!strcmp(source_ref->name, "HEAD") ||
+ starts_with(source_ref->name, "refs/heads/"))
+ install_branch_config(0,
+ branch->name,
+ transport->remote->name,
+ source_ref->name);
+ else if (starts_with(source_ref->name, "refs/remotes/"))
+ warning(_("not setting upstream for a remote remote-tracking branch"));
+ else if (starts_with(source_ref->name, "refs/tags/"))
+ warning(_("not setting upstream for a remote tag"));
+ else
+ warning(_("unknown branch type"));
+ } else {
+ warning(_("no source branch found;\n"
+ "you need to specify exactly one branch with the --set-upstream option"));
+ }
+ }
+
+cleanup:
+ if (retcode && transaction) {
+ ref_transaction_abort(transaction, &err);
+ error("%s", err.buf);
+ }
+
+ close_fetch_head(&fetch_head);
+ strbuf_release(&err);
+ free_refs(ref_map);
+ 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 strvec *argv)
+{
+ if (dry_run)
+ strvec_push(argv, "--dry-run");
+ if (prune != -1)
+ strvec_push(argv, prune ? "--prune" : "--no-prune");
+ if (prune_tags != -1)
+ strvec_push(argv, prune_tags ? "--prune-tags" : "--no-prune-tags");
+ if (update_head_ok)
+ strvec_push(argv, "--update-head-ok");
+ if (force)
+ strvec_push(argv, "--force");
+ if (keep)
+ strvec_push(argv, "--keep");
+ if (recurse_submodules == RECURSE_SUBMODULES_ON)
+ strvec_push(argv, "--recurse-submodules");
+ else if (recurse_submodules == RECURSE_SUBMODULES_ON_DEMAND)
+ strvec_push(argv, "--recurse-submodules=on-demand");
+ if (tags == TAGS_SET)
+ strvec_push(argv, "--tags");
+ else if (tags == TAGS_UNSET)
+ strvec_push(argv, "--no-tags");
+ if (verbosity >= 2)
+ strvec_push(argv, "-v");
+ if (verbosity >= 1)
+ strvec_push(argv, "-v");
+ else if (verbosity < 0)
+ strvec_push(argv, "-q");
+ if (family == TRANSPORT_FAMILY_IPV4)
+ strvec_push(argv, "--ipv4");
+ else if (family == TRANSPORT_FAMILY_IPV6)
+ strvec_push(argv, "--ipv6");
+}
+
+/* Fetch multiple remotes in parallel */
+
+struct parallel_fetch_state {
+ const char **argv;
+ struct string_list *remotes;
+ int next, result;
+};
+
+static int fetch_next_remote(struct child_process *cp, struct strbuf *out,
+ void *cb, void **task_cb)
+{
+ struct parallel_fetch_state *state = cb;
+ char *remote;
+
+ if (state->next < 0 || state->next >= state->remotes->nr)
+ return 0;
+
+ remote = state->remotes->items[state->next++].string;
+ *task_cb = remote;
+
+ strvec_pushv(&cp->args, state->argv);
+ strvec_push(&cp->args, remote);
+ cp->git_cmd = 1;
+
+ if (verbosity >= 0)
+ printf(_("Fetching %s\n"), remote);
+
+ return 1;
+}
+
+static int fetch_failed_to_start(struct strbuf *out, void *cb, void *task_cb)
+{
+ struct parallel_fetch_state *state = cb;
+ const char *remote = task_cb;
+
+ state->result = error(_("could not fetch %s"), remote);
+
+ return 0;
+}
+
+static int fetch_finished(int result, struct strbuf *out,
+ void *cb, void *task_cb)
+{
+ struct parallel_fetch_state *state = cb;
+ const char *remote = task_cb;
+
+ if (result) {
+ strbuf_addf(out, _("could not fetch '%s' (exit code: %d)\n"),
+ remote, result);
+ state->result = -1;
+ }
+
+ return 0;
+}
+
+static int fetch_multiple(struct string_list *list, int max_children)
+{
+ int i, result = 0;
+ struct strvec argv = STRVEC_INIT;
+
+ if (!append && write_fetch_head) {
+ int errcode = truncate_fetch_head();
+ if (errcode)
+ return errcode;
+ }
+
+ strvec_pushl(&argv, "fetch", "--append", "--no-auto-gc",
+ "--no-write-commit-graph", NULL);
+ add_options_to_argv(&argv);
+
+ if (max_children != 1 && list->nr != 1) {
+ struct parallel_fetch_state state = { argv.v, list, 0, 0 };
+ const struct run_process_parallel_opts opts = {
+ .tr2_category = "fetch",
+ .tr2_label = "parallel/fetch",
+
+ .processes = max_children,
+
+ .get_next_task = &fetch_next_remote,
+ .start_failure = &fetch_failed_to_start,
+ .task_finished = &fetch_finished,
+ .data = &state,
+ };
+
+ strvec_push(&argv, "--end-of-options");
+
+ run_processes_parallel(&opts);
+ result = state.result;
+ } else
+ for (i = 0; i < list->nr; i++) {
+ const char *name = list->items[i].string;
+ struct child_process cmd = CHILD_PROCESS_INIT;
+
+ strvec_pushv(&cmd.args, argv.v);
+ strvec_push(&cmd.args, name);
+ if (verbosity >= 0)
+ printf(_("Fetching %s\n"), name);
+ cmd.git_cmd = 1;
+ if (run_command(&cmd)) {
+ error(_("could not fetch %s"), name);
+ result = 1;
+ }
+ }
+
+ strvec_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 (!has_promisor_remote() && !filter_options.choice)
+ return;
+
+ /*
+ * If this is a partial-fetch request, we enable partial on
+ * this repo if not already enabled and remember the given
+ * filter-spec as the default for subsequent fetches to this
+ * remote if there is currently no default filter-spec.
+ */
+ if (filter_options.choice) {
+ partial_clone_register(remote->name, &filter_options);
+ 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, remote->name);
+ return;
+}
+
+static int fetch_one(struct remote *remote, int argc, const char **argv,
+ int prune_tags_ok, int use_stdin_refspecs)
+{
+ 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")) {
+ i++;
+ if (i >= argc)
+ die(_("you need to specify a tag name"));
+
+ refspec_appendf(&rs, "refs/tags/%s:refs/tags/%s",
+ argv[i], argv[i]);
+ } else {
+ refspec_append(&rs, argv[i]);
+ }
+ }
+
+ if (use_stdin_refspecs) {
+ struct strbuf line = STRBUF_INIT;
+ while (strbuf_getline_lf(&line, stdin) != EOF)
+ refspec_append(&rs, line.buf);
+ strbuf_release(&line);
+ }
+
+ if (server_options.nr)
+ gtransport->server_options = &server_options;
+
+ sigchain_push_common(unlock_pack_on_signal);
+ atexit(unlock_pack_atexit);
+ 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;
+
+ packet_trace_identity("fetch");
+
+ /* Record the command line for the reflog */
+ strbuf_addstr(&default_rla, "fetch");
+ for (i = 1; i < argc; i++) {
+ /* This handles non-URLs gracefully */
+ char *anon = transport_anonymize_url(argv[i]);
+
+ strbuf_addf(&default_rla, " %s", anon);
+ free(anon);
+ }
+
+ git_config(git_fetch_config, NULL);
+ if (the_repository->gitdir) {
+ prepare_repo_settings(the_repository);
+ the_repository->settings.command_requires_full_index = 0;
+ }
+
+ argc = parse_options(argc, argv, prefix,
+ builtin_fetch_options, builtin_fetch_usage, 0);
+
+ if (recurse_submodules_cli != RECURSE_SUBMODULES_DEFAULT)
+ recurse_submodules = recurse_submodules_cli;
+
+ if (negotiate_only) {
+ switch (recurse_submodules_cli) {
+ case RECURSE_SUBMODULES_OFF:
+ case RECURSE_SUBMODULES_DEFAULT:
+ /*
+ * --negotiate-only should never recurse into
+ * submodules. Skip it by setting recurse_submodules to
+ * RECURSE_SUBMODULES_OFF.
+ */
+ recurse_submodules = RECURSE_SUBMODULES_OFF;
+ break;
+
+ default:
+ die(_("options '%s' and '%s' cannot be used together"),
+ "--negotiate-only", "--recurse-submodules");
+ }
+ }
+
+ if (recurse_submodules != RECURSE_SUBMODULES_OFF) {
+ int *sfjc = submodule_fetch_jobs_config == -1
+ ? &submodule_fetch_jobs_config : NULL;
+ int *rs = recurse_submodules == RECURSE_SUBMODULES_DEFAULT
+ ? &recurse_submodules : NULL;
+
+ fetch_config_from_gitmodules(sfjc, rs);
+ }
+
+ if (negotiate_only && !negotiation_tip.nr)
+ die(_("--negotiate-only needs one or more --negotiation-tip=*"));
+
+ if (deepen_relative) {
+ if (deepen_relative < 0)
+ die(_("negative depth in --deepen is not supported"));
+ if (depth)
+ die(_("options '%s' and '%s' cannot be used together"), "--deepen", "--depth");
+ depth = xstrfmt("%d", deepen_relative);
+ }
+ if (unshallow) {
+ if (depth)
+ die(_("options '%s' and '%s' cannot be used together"), "--depth", "--unshallow");
+ 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;
+
+ /* FETCH_HEAD never gets updated in --dry-run mode */
+ if (dry_run)
+ write_fetch_head = 0;
+
+ 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);
+
+ /* do not do fetch_multiple() of one */
+ if (list.nr == 1)
+ remote = remote_get(list.items[0].string);
+ } 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 (negotiate_only) {
+ struct oidset acked_commits = OIDSET_INIT;
+ struct oidset_iter iter;
+ const struct object_id *oid;
+
+ if (!remote)
+ die(_("must supply remote when using --negotiate-only"));
+ gtransport = prepare_transport(remote, 1);
+ if (gtransport->smart_options) {
+ gtransport->smart_options->acked_commits = &acked_commits;
+ } else {
+ warning(_("protocol does not support --negotiate-only, exiting"));
+ result = 1;
+ goto cleanup;
+ }
+ if (server_options.nr)
+ gtransport->server_options = &server_options;
+ result = transport_fetch_refs(gtransport, NULL);
+
+ oidset_iter_init(&acked_commits, &iter);
+ while ((oid = oidset_iter_next(&iter)))
+ printf("%s\n", oid_to_hex(oid));
+ oidset_clear(&acked_commits);
+ } else if (remote) {
+ if (filter_options.choice || has_promisor_remote())
+ fetch_one_setup_partial(remote);
+ result = fetch_one(remote, argc, argv, prune_tags_ok, stdin_refspecs);
+ } else {
+ int max_children = max_jobs;
+
+ if (filter_options.choice)
+ die(_("--filter can only be used with the remote "
+ "configured in extensions.partialclone"));
+
+ if (atomic_fetch)
+ die(_("--atomic can only be used when fetching "
+ "from one remote"));
+
+ if (stdin_refspecs)
+ die(_("--stdin can only be used when fetching "
+ "from one remote"));
+
+ if (max_children < 0)
+ max_children = fetch_parallel_config;
+
+ /* TODO should this also die if we have a previous partial-clone? */
+ result = fetch_multiple(&list, max_children);
+ }
+
+
+ /*
+ * This is only needed after fetch_one(), which does not fetch
+ * submodules by itself.
+ *
+ * When we fetch from multiple remotes, fetch_multiple() has
+ * already updated submodules to grab commits necessary for
+ * the fetched history from each remote, so there is no need
+ * to fetch submodules from here.
+ */
+ if (!result && remote && (recurse_submodules != RECURSE_SUBMODULES_OFF)) {
+ struct strvec options = STRVEC_INIT;
+ int max_children = max_jobs;
+
+ if (max_children < 0)
+ max_children = submodule_fetch_jobs_config;
+ if (max_children < 0)
+ max_children = fetch_parallel_config;
+
+ add_options_to_argv(&options);
+ result = fetch_submodules(the_repository,
+ &options,
+ submodule_prefix,
+ recurse_submodules,
+ recurse_submodules_default,
+ verbosity < 0,
+ max_children);
+ strvec_clear(&options);
+ }
+
+ /*
+ * Skip irrelevant tasks because we know objects were not
+ * fetched.
+ *
+ * NEEDSWORK: as a future optimization, we can return early
+ * whenever objects were not fetched e.g. if we already have all
+ * of them.
+ */
+ if (negotiate_only)
+ goto cleanup;
+
+ prepare_repo_settings(the_repository);
+ if (fetch_write_commit_graph > 0 ||
+ (fetch_write_commit_graph < 0 &&
+ the_repository->settings.fetch_write_commit_graph)) {
+ int commit_graph_flags = COMMIT_GRAPH_WRITE_SPLIT;
+
+ if (progress)
+ commit_graph_flags |= COMMIT_GRAPH_WRITE_PROGRESS;
+
+ write_commit_graph_reachable(the_repository->objects->odb,
+ commit_graph_flags,
+ NULL);
+ }
+
+ if (enable_auto_gc) {
+ if (refetch) {
+ /*
+ * Hint auto-maintenance strongly to encourage repacking,
+ * but respect config settings disabling it.
+ */
+ int opt_val;
+ if (git_config_get_int("gc.autopacklimit", &opt_val))
+ opt_val = -1;
+ if (opt_val != 0)
+ git_config_push_parameter("gc.autoPackLimit=1");
+
+ if (git_config_get_int("maintenance.incremental-repack.auto", &opt_val))
+ opt_val = -1;
+ if (opt_val != 0)
+ git_config_push_parameter("maintenance.incremental-repack.auto=-1");
+ }
+ run_auto_maintenance(verbosity < 0);
+ }
+
+ cleanup:
+ string_list_clear(&list, 0);
+ return result;
+}