diff options
Diffstat (limited to 'fetch-pack.c')
| -rw-r--r-- | fetch-pack.c | 758 |
1 files changed, 641 insertions, 117 deletions
diff --git a/fetch-pack.c b/fetch-pack.c index c85fc6aeed..cc7a42fee9 100644 --- a/fetch-pack.c +++ b/fetch-pack.c @@ -1,10 +1,12 @@ #include "cache.h" +#include "repository.h" +#include "config.h" #include "lockfile.h" #include "refs.h" #include "pkt-line.h" #include "commit.h" #include "tag.h" -#include "exec_cmd.h" +#include "exec-cmd.h" #include "pack.h" #include "sideband.h" #include "fetch-pack.h" @@ -15,6 +17,8 @@ #include "version.h" #include "prio-queue.h" #include "sha1-array.h" +#include "oidset.h" +#include "packfile.h" static int transfer_unpack_limit = -1; static int fetch_unpack_limit = -1; @@ -26,6 +30,7 @@ static int deepen_not_ok; static int fetch_fsck_objects = -1; static int transfer_fsck_objects = -1; static int agent_supported; +static int server_supports_filtering; static struct lock_file shallow_lock; static const char *alternate_shallow_file; @@ -35,6 +40,7 @@ static const char *alternate_shallow_file; #define COMMON_REF (1U << 2) #define SEEN (1U << 3) #define POPPED (1U << 4) +#define ALTERNATE (1U << 5) static int marked; @@ -67,6 +73,41 @@ static inline void print_verbose(const struct fetch_pack_args *args, fputc('\n', stderr); } +struct alternate_object_cache { + struct object **items; + size_t nr, alloc; +}; + +static void cache_one_alternate(const char *refname, + const struct object_id *oid, + void *vcache) +{ + struct alternate_object_cache *cache = vcache; + struct object *obj = parse_object(oid); + + if (!obj || (obj->flags & ALTERNATE)) + return; + + obj->flags |= ALTERNATE; + ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc); + cache->items[cache->nr++] = obj; +} + +static void for_each_cached_alternate(void (*cb)(struct object *)) +{ + static int initialized; + static struct alternate_object_cache cache; + size_t i; + + if (!initialized) { + for_each_alternate_ref(cache_one_alternate, &cache); + initialized = 1; + } + + for (i = 0; i < cache.nr; i++) + cb(cache.items[i]); +} + static void rev_list_push(struct commit *commit, int mark) { if (!(commit->object.flags & mark)) { @@ -82,9 +123,9 @@ static void rev_list_push(struct commit *commit, int mark) } } -static int rev_list_insert_ref(const char *refname, const unsigned char *sha1) +static int rev_list_insert_ref(const char *refname, const struct object_id *oid) { - struct object *o = deref_tag(parse_object(sha1), refname, 0); + struct object *o = deref_tag(parse_object(oid), refname, 0); if (o && o->type == OBJ_COMMIT) rev_list_push((struct commit *)o, SEEN); @@ -95,13 +136,13 @@ static int rev_list_insert_ref(const char *refname, const unsigned char *sha1) static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid, int flag, void *cb_data) { - return rev_list_insert_ref(refname, oid->hash); + return rev_list_insert_ref(refname, oid); } static int clear_marks(const char *refname, const struct object_id *oid, int flag, void *cb_data) { - struct object *o = deref_tag(parse_object(oid->hash), refname, 0); + struct object *o = deref_tag(parse_object(oid), refname, 0); if (o && o->type == OBJ_COMMIT) clear_commit_marks((struct commit *)o, @@ -147,7 +188,7 @@ static void mark_common(struct commit *commit, Get the next rev to send, ignoring the common. */ -static const unsigned char *get_rev(void) +static const struct object_id *get_rev(void) { struct commit *commit = NULL; @@ -186,7 +227,7 @@ static const unsigned char *get_rev(void) } } - return commit->object.oid.hash; + return &commit->object.oid; } enum ack_type { @@ -215,18 +256,18 @@ static void consume_shallow_list(struct fetch_pack_args *args, int fd) } } -static enum ack_type get_ack(int fd, unsigned char *result_sha1) +static enum ack_type get_ack(int fd, struct object_id *result_oid) { int len; char *line = packet_read_line(fd, &len); const char *arg; - if (!len) - die(_("git fetch-pack: expected ACK/NAK, got EOF")); + if (!line) + die(_("git fetch-pack: expected ACK/NAK, got a flush packet")); if (!strcmp(line, "NAK")) return NAK; if (skip_prefix(line, "ACK ", &arg)) { - if (!get_sha1_hex(arg, result_sha1)) { + if (!get_oid_hex(arg, result_oid)) { arg += 40; len -= arg - line; if (len < 1) @@ -240,6 +281,8 @@ static enum ack_type get_ack(int fd, unsigned char *result_sha1) return ACK; } } + if (skip_prefix(line, "ERR ", &arg)) + die(_("remote error: %s"), arg); die(_("git fetch-pack: expected ACK/NAK, got '%s'"), line); } @@ -253,18 +296,18 @@ static void send_request(struct fetch_pack_args *args, write_or_die(fd, buf->buf, buf->len); } -static void insert_one_alternate_ref(const struct ref *ref, void *unused) +static void insert_one_alternate_object(struct object *obj) { - rev_list_insert_ref(NULL, ref->old_oid.hash); + rev_list_insert_ref(NULL, &obj->oid); } #define INITIAL_FLUSH 16 #define PIPESAFE_FLUSH 32 #define LARGE_FLUSH 16384 -static int next_flush(struct fetch_pack_args *args, int count) +static int next_flush(int stateless_rpc, int count) { - if (args->stateless_rpc) { + if (stateless_rpc) { if (count < LARGE_FLUSH) count <<= 1; else @@ -279,12 +322,12 @@ static int next_flush(struct fetch_pack_args *args, int count) } static int find_common(struct fetch_pack_args *args, - int fd[2], unsigned char *result_sha1, + int fd[2], struct object_id *result_oid, struct ref *refs) { int fetching; int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; - const unsigned char *sha1; + const struct object_id *oid; unsigned in_vain = 0; int got_continue = 0; int got_ready = 0; @@ -298,11 +341,11 @@ static int find_common(struct fetch_pack_args *args, marked = 1; for_each_ref(rev_list_insert_ref_oid, NULL); - for_each_alternate_ref(insert_one_alternate_ref, NULL); + for_each_cached_alternate(insert_one_alternate_object); fetching = 0; for ( ; refs ; refs = refs->next) { - unsigned char *remote = refs->old_oid.hash; + struct object_id *remote = &refs->old_oid; const char *remote_hex; struct object *o; @@ -316,12 +359,12 @@ static int find_common(struct fetch_pack_args *args, * interested in the case we *know* the object is * reachable and we have already scanned it. */ - if (((o = lookup_object(remote)) != NULL) && + if (((o = lookup_object(remote->hash)) != NULL) && (o->flags & COMPLETE)) { continue; } - remote_hex = sha1_to_hex(remote); + remote_hex = oid_to_hex(remote); if (!fetching) { struct strbuf c = STRBUF_INIT; if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); @@ -338,6 +381,8 @@ static int find_common(struct fetch_pack_args *args, if (deepen_not_ok) strbuf_addstr(&c, " deepen-not"); if (agent_supported) strbuf_addf(&c, " agent=%s", git_user_agent_sanitized()); + if (args->filter_options.choice) + strbuf_addstr(&c, " filter"); packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf); strbuf_release(&c); } else @@ -356,8 +401,8 @@ static int find_common(struct fetch_pack_args *args, if (args->depth > 0) packet_buf_write(&req_buf, "deepen %d", args->depth); if (args->deepen_since) { - unsigned long max_age = approxidate(args->deepen_since); - packet_buf_write(&req_buf, "deepen-since %lu", max_age); + timestamp_t max_age = approxidate(args->deepen_since); + packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age); } if (args->deepen_not) { int i; @@ -366,31 +411,34 @@ static int find_common(struct fetch_pack_args *args, packet_buf_write(&req_buf, "deepen-not %s", s->string); } } + if (server_supports_filtering && args->filter_options.choice) + packet_buf_write(&req_buf, "filter %s", + args->filter_options.filter_spec); packet_buf_flush(&req_buf); state_len = req_buf.len; if (args->deepen) { char *line; const char *arg; - unsigned char sha1[20]; + struct object_id oid; send_request(args, fd[1], &req_buf); while ((line = packet_read_line(fd[0], NULL))) { if (skip_prefix(line, "shallow ", &arg)) { - if (get_sha1_hex(arg, sha1)) + if (get_oid_hex(arg, &oid)) die(_("invalid shallow line: %s"), line); - register_shallow(sha1); + register_shallow(&oid); continue; } if (skip_prefix(line, "unshallow ", &arg)) { - if (get_sha1_hex(arg, sha1)) + if (get_oid_hex(arg, &oid)) die(_("invalid unshallow line: %s"), line); - if (!lookup_object(sha1)) + if (!lookup_object(oid.hash)) die(_("object not found: %s"), line); /* make sure that it is parsed as shallow */ - if (!parse_object(sha1)) + if (!parse_object(&oid)) die(_("error in object: %s"), line); - if (unregister_shallow(sha1)) + if (unregister_shallow(&oid)) die(_("no shallow found: %s"), line); continue; } @@ -409,9 +457,11 @@ static int find_common(struct fetch_pack_args *args, flushes = 0; retval = -1; - while ((sha1 = get_rev())) { - packet_buf_write(&req_buf, "have %s\n", sha1_to_hex(sha1)); - print_verbose(args, "have %s", sha1_to_hex(sha1)); + if (args->no_dependents) + goto done; + while ((oid = get_rev())) { + packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid)); + print_verbose(args, "have %s", oid_to_hex(oid)); in_vain++; if (flush_at <= ++count) { int ack; @@ -420,7 +470,7 @@ static int find_common(struct fetch_pack_args *args, send_request(args, fd[1], &req_buf); strbuf_setlen(&req_buf, state_len); flushes++; - flush_at = next_flush(args, count); + flush_at = next_flush(args->stateless_rpc, count); /* * We keep one window "ahead" of the other side, and @@ -431,10 +481,10 @@ static int find_common(struct fetch_pack_args *args, consume_shallow_list(args, fd[0]); do { - ack = get_ack(fd[0], result_sha1); + ack = get_ack(fd[0], result_oid); if (ack) print_verbose(args, _("got %s %d %s"), "ack", - ack, sha1_to_hex(result_sha1)); + ack, oid_to_hex(result_oid)); switch (ack) { case ACK: flushes = 0; @@ -445,9 +495,9 @@ static int find_common(struct fetch_pack_args *args, case ACK_ready: case ACK_continue: { struct commit *commit = - lookup_commit(result_sha1); + lookup_commit(result_oid); if (!commit) - die(_("invalid commit %s"), sha1_to_hex(result_sha1)); + die(_("invalid commit %s"), oid_to_hex(result_oid)); if (args->stateless_rpc && ack == ACK_common && !(commit->object.flags & COMMON)) { @@ -455,7 +505,7 @@ static int find_common(struct fetch_pack_args *args, * on the next RPC request so the peer knows * it is in common with us. */ - const char *hex = sha1_to_hex(result_sha1); + const char *hex = oid_to_hex(result_oid); packet_buf_write(&req_buf, "have %s\n", hex); state_len = req_buf.len; /* @@ -500,10 +550,10 @@ done: if (!got_ready || !no_done) consume_shallow_list(args, fd[0]); while (flushes || multi_ack) { - int ack = get_ack(fd[0], result_sha1); + int ack = get_ack(fd[0], result_oid); if (ack) { print_verbose(args, _("got %s (%d) %s"), "ack", - ack, sha1_to_hex(result_sha1)); + ack, oid_to_hex(result_oid)); if (ack == ACK) return 0; multi_ack = 1; @@ -517,16 +567,16 @@ done: static struct commit_list *complete; -static int mark_complete(const unsigned char *sha1) +static int mark_complete(const struct object_id *oid) { - struct object *o = parse_object(sha1); + struct object *o = parse_object(oid); while (o && o->type == OBJ_TAG) { struct tag *t = (struct tag *) o; if (!t->tagged) break; /* broken repository */ o->flags |= COMPLETE; - o = parse_object(t->tagged->oid.hash); + o = parse_object(&t->tagged->oid); } if (o && o->type == OBJ_COMMIT) { struct commit *commit = (struct commit *)o; @@ -541,11 +591,11 @@ static int mark_complete(const unsigned char *sha1) static int mark_complete_oid(const char *refname, const struct object_id *oid, int flag, void *cb_data) { - return mark_complete(oid->hash); + return mark_complete(oid); } static void mark_recent_complete_commits(struct fetch_pack_args *args, - unsigned long cutoff) + timestamp_t cutoff) { while (complete && cutoff <= complete->item->date) { print_verbose(args, _("Marking %s as complete"), @@ -554,13 +604,38 @@ static void mark_recent_complete_commits(struct fetch_pack_args *args, } } +static void add_refs_to_oidset(struct oidset *oids, struct ref *refs) +{ + for (; refs; refs = refs->next) + oidset_insert(oids, &refs->old_oid); +} + +static int tip_oids_contain(struct oidset *tip_oids, + struct ref *unmatched, struct ref *newlist, + const struct object_id *id) +{ + /* + * Note that this only looks at the ref lists the first time it's + * called. This works out in filter_refs() because even though it may + * add to "newlist" between calls, the additions will always be for + * oids that are already in the set. + */ + if (!tip_oids->map.map.tablesize) { + add_refs_to_oidset(tip_oids, unmatched); + add_refs_to_oidset(tip_oids, newlist); + } + return oidset_contains(tip_oids, id); +} + static void filter_refs(struct fetch_pack_args *args, struct ref **refs, struct ref **sought, int nr_sought) { struct ref *newlist = NULL; struct ref **newtail = &newlist; + struct ref *unmatched = NULL; struct ref *ref, *next; + struct oidset tip_oids = OIDSET_INIT; int i; i = 0; @@ -578,7 +653,7 @@ static void filter_refs(struct fetch_pack_args *args, break; /* definitely do not have it */ else if (cmp == 0) { keep = 1; /* definitely have it */ - sought[i]->matched = 1; + sought[i]->match_status = REF_MATCHED; } i++; } @@ -593,35 +668,70 @@ static void filter_refs(struct fetch_pack_args *args, ref->next = NULL; newtail = &ref->next; } else { - free(ref); + ref->next = unmatched; + unmatched = ref; } } /* Append unmatched requests to the list */ - if ((allow_unadvertised_object_request & - (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1))) { - for (i = 0; i < nr_sought; i++) { - unsigned char sha1[20]; + for (i = 0; i < nr_sought; i++) { + struct object_id oid; + const char *p; - ref = sought[i]; - if (ref->matched) - continue; - if (get_sha1_hex(ref->name, sha1) || - ref->name[40] != '\0' || - hashcmp(sha1, ref->old_oid.hash)) - continue; + ref = sought[i]; + if (ref->match_status != REF_NOT_MATCHED) + continue; + if (parse_oid_hex(ref->name, &oid, &p) || + *p != '\0' || + oidcmp(&oid, &ref->old_oid)) + continue; - ref->matched = 1; + if ((allow_unadvertised_object_request & + (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)) || + tip_oids_contain(&tip_oids, unmatched, newlist, + &ref->old_oid)) { + ref->match_status = REF_MATCHED; *newtail = copy_ref(ref); newtail = &(*newtail)->next; + } else { + ref->match_status = REF_UNADVERTISED_NOT_ALLOWED; } } + + oidset_clear(&tip_oids); + for (ref = unmatched; ref; ref = next) { + next = ref->next; + free(ref); + } + *refs = newlist; } -static void mark_alternate_complete(const struct ref *ref, void *unused) +static void mark_alternate_complete(struct object *obj) { - mark_complete(ref->old_oid.hash); + mark_complete(&obj->oid); +} + +struct loose_object_iter { + struct oidset *loose_object_set; + struct ref *refs; +}; + +/* + * If the number of refs is not larger than the number of loose objects, + * this function stops inserting. + */ +static int add_loose_objects_to_set(const struct object_id *oid, + const char *path, + void *data) +{ + struct loose_object_iter *iter = data; + oidset_insert(iter->loose_object_set, oid); + if (iter->refs == NULL) + return 1; + + iter->refs = iter->refs->next; + return 0; } static int everything_local(struct fetch_pack_args *args, @@ -630,17 +740,34 @@ static int everything_local(struct fetch_pack_args *args, { struct ref *ref; int retval; - unsigned long cutoff = 0; + int old_save_commit_buffer = save_commit_buffer; + timestamp_t cutoff = 0; + struct oidset loose_oid_set = OIDSET_INIT; + int use_oidset = 0; + struct loose_object_iter iter = {&loose_oid_set, *refs}; + + /* Enumerate all loose objects or know refs are not so many. */ + use_oidset = !for_each_loose_object(add_loose_objects_to_set, + &iter, 0); save_commit_buffer = 0; for (ref = *refs; ref; ref = ref->next) { struct object *o; + unsigned int flags = OBJECT_INFO_QUICK; - if (!has_object_file(&ref->old_oid)) - continue; + if (use_oidset && + !oidset_contains(&loose_oid_set, &ref->old_oid)) { + /* + * I know this does not exist in the loose form, + * so check if it exists in a non-loose form. + */ + flags |= OBJECT_INFO_IGNORE_LOOSE; + } - o = parse_object(ref->old_oid.hash); + if (!has_object_file_with_flags(&ref->old_oid, flags)) + continue; + o = parse_object(&ref->old_oid); if (!o) continue; @@ -655,48 +782,55 @@ static int everything_local(struct fetch_pack_args *args, } } - if (!args->deepen) { - for_each_ref(mark_complete_oid, NULL); - for_each_alternate_ref(mark_alternate_complete, NULL); - commit_list_sort_by_date(&complete); - if (cutoff) - mark_recent_complete_commits(args, cutoff); - } + oidset_clear(&loose_oid_set); - /* - * Mark all complete remote refs as common refs. - * Don't mark them common yet; the server has to be told so first. - */ - for (ref = *refs; ref; ref = ref->next) { - struct object *o = deref_tag(lookup_object(ref->old_oid.hash), - NULL, 0); + if (!args->no_dependents) { + if (!args->deepen) { + for_each_ref(mark_complete_oid, NULL); + for_each_cached_alternate(mark_alternate_complete); + commit_list_sort_by_date(&complete); + if (cutoff) + mark_recent_complete_commits(args, cutoff); + } - if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) - continue; + /* + * Mark all complete remote refs as common refs. + * Don't mark them common yet; the server has to be told so first. + */ + for (ref = *refs; ref; ref = ref->next) { + struct object *o = deref_tag(lookup_object(ref->old_oid.hash), + NULL, 0); - if (!(o->flags & SEEN)) { - rev_list_push((struct commit *)o, COMMON_REF | SEEN); + if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) + continue; + + if (!(o->flags & SEEN)) { + rev_list_push((struct commit *)o, COMMON_REF | SEEN); - mark_common((struct commit *)o, 1, 1); + mark_common((struct commit *)o, 1, 1); + } } } filter_refs(args, refs, sought, nr_sought); for (retval = 1, ref = *refs; ref ; ref = ref->next) { - const unsigned char *remote = ref->old_oid.hash; + const struct object_id *remote = &ref->old_oid; struct object *o; - o = lookup_object(remote); + o = lookup_object(remote->hash); if (!o || !(o->flags & COMPLETE)) { retval = 0; - print_verbose(args, "want %s (%s)", sha1_to_hex(remote), + print_verbose(args, "want %s (%s)", oid_to_hex(remote), ref->name); continue; } - print_verbose(args, _("already have %s (%s)"), sha1_to_hex(remote), + print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote), ref->name); } + + save_commit_buffer = old_save_commit_buffer; + return retval; } @@ -753,7 +887,7 @@ static int get_pack(struct fetch_pack_args *args, argv_array_push(&cmd.args, alternate_shallow_file); } - if (do_keep) { + if (do_keep || args->from_promisor) { if (pack_lockfile) cmd.out = -1; cmd_name = "index-pack"; @@ -763,9 +897,9 @@ static int get_pack(struct fetch_pack_args *args, argv_array_push(&cmd.args, "-v"); if (args->use_thin_pack) argv_array_push(&cmd.args, "--fix-thin"); - if (args->lock_pack || unpack_limit) { - char hostname[256]; - if (gethostname(hostname, sizeof(hostname))) + if (do_keep && (args->lock_pack || unpack_limit)) { + char hostname[HOST_NAME_MAX + 1]; + if (xgethostname(hostname, sizeof(hostname))) xsnprintf(hostname, sizeof(hostname), "localhost"); argv_array_pushf(&cmd.args, "--keep=fetch-pack %"PRIuMAX " on %s", @@ -773,6 +907,8 @@ static int get_pack(struct fetch_pack_args *args, } if (args->check_self_contained_and_connected) argv_array_push(&cmd.args, "--check-self-contained-and-connected"); + if (args->from_promisor) + argv_array_push(&cmd.args, "--promisor"); } else { cmd_name = "unpack-objects"; @@ -790,8 +926,17 @@ static int get_pack(struct fetch_pack_args *args, ? fetch_fsck_objects : transfer_fsck_objects >= 0 ? transfer_fsck_objects - : 0) - argv_array_push(&cmd.args, "--strict"); + : 0) { + if (args->from_promisor) + /* + * We cannot use --strict in index-pack because it + * checks both broken objects and links, but we only + * want to check for broken objects. + */ + argv_array_push(&cmd.args, "--fsck-objects"); + else + argv_array_push(&cmd.args, "--strict"); + } cmd.in = demux.out; cmd.git_cmd = 1; @@ -833,7 +978,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, char **pack_lockfile) { struct ref *ref = copy_ref_list(orig_ref); - unsigned char sha1[20]; + struct object_id oid; const char *agent_feature; int agent_len; @@ -884,6 +1029,13 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, else prefer_ofs_delta = 0; + if (server_supports("filter")) { + server_supports_filtering = 1; + print_verbose(args, _("Server supports filter")); + } else if (args->filter_options.choice) { + warning("filtering not recognized by server, ignoring"); + } + if ((agent_feature = server_feature_value("agent", &agent_len))) { agent_supported = 1; if (agent_len) @@ -905,7 +1057,7 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, packet_flush(fd[1]); goto all_done; } - if (find_common(args, fd, sha1, ref) < 0) + if (find_common(args, fd, &oid, ref) < 0) if (!args->keep_pack) /* When cloning, it is not unusual to have * no common commit. @@ -928,6 +1080,350 @@ static struct ref *do_fetch_pack(struct fetch_pack_args *args, return ref; } +static void add_shallow_requests(struct strbuf *req_buf, + const struct fetch_pack_args *args) +{ + if (is_repository_shallow()) + write_shallow_commits(req_buf, 1, NULL); + if (args->depth > 0) + packet_buf_write(req_buf, "deepen %d", args->depth); + if (args->deepen_since) { + timestamp_t max_age = approxidate(args->deepen_since); + packet_buf_write(req_buf, "deepen-since %"PRItime, max_age); + } + if (args->deepen_not) { + int i; + for (i = 0; i < args->deepen_not->nr; i++) { + struct string_list_item *s = args->deepen_not->items + i; + packet_buf_write(req_buf, "deepen-not %s", s->string); + } + } +} + +static void add_wants(const struct ref *wants, struct strbuf *req_buf) +{ + for ( ; wants ; wants = wants->next) { + const struct object_id *remote = &wants->old_oid; + const char *remote_hex; + struct object *o; + + /* + * If that object is complete (i.e. it is an ancestor of a + * local ref), we tell them we have it but do not have to + * tell them about its ancestors, which they already know + * about. + * + * We use lookup_object here because we are only + * interested in the case we *know* the object is + * reachable and we have already scanned it. + */ + if (((o = lookup_object(remote->hash)) != NULL) && + (o->flags & COMPLETE)) { + continue; + } + + remote_hex = oid_to_hex(remote); + packet_buf_write(req_buf, "want %s\n", remote_hex); + } +} + +static void add_common(struct strbuf *req_buf, struct oidset *common) +{ + struct oidset_iter iter; + const struct object_id *oid; + oidset_iter_init(common, &iter); + + while ((oid = oidset_iter_next(&iter))) { + packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); + } +} + +static int add_haves(struct strbuf *req_buf, int *haves_to_send, int *in_vain) +{ + int ret = 0; + int haves_added = 0; + const struct object_id *oid; + + while ((oid = get_rev())) { + packet_buf_write(req_buf, "have %s\n", oid_to_hex(oid)); + if (++haves_added >= *haves_to_send) + break; + } + + *in_vain += haves_added; + if (!haves_added || *in_vain >= MAX_IN_VAIN) { + /* Send Done */ + packet_buf_write(req_buf, "done\n"); + ret = 1; + } + + /* Increase haves to send on next round */ + *haves_to_send = next_flush(1, *haves_to_send); + + return ret; +} + +static int send_fetch_request(int fd_out, const struct fetch_pack_args *args, + const struct ref *wants, struct oidset *common, + int *haves_to_send, int *in_vain) +{ + int ret = 0; + struct strbuf req_buf = STRBUF_INIT; + + if (server_supports_v2("fetch", 1)) + packet_buf_write(&req_buf, "command=fetch"); + if (server_supports_v2("agent", 0)) + packet_buf_write(&req_buf, "agent=%s", git_user_agent_sanitized()); + if (args->server_options && args->server_options->nr && + server_supports_v2("server-option", 1)) { + int i; + for (i = 0; i < args->server_options->nr; i++) + packet_write_fmt(fd_out, "server-option=%s", + args->server_options->items[i].string); + } + + packet_buf_delim(&req_buf); + if (args->use_thin_pack) + packet_buf_write(&req_buf, "thin-pack"); + if (args->no_progress) + packet_buf_write(&req_buf, "no-progress"); + if (args->include_tag) + packet_buf_write(&req_buf, "include-tag"); + if (prefer_ofs_delta) + packet_buf_write(&req_buf, "ofs-delta"); + + /* Add shallow-info and deepen request */ + if (server_supports_feature("fetch", "shallow", 0)) + add_shallow_requests(&req_buf, args); + else if (is_repository_shallow() || args->deepen) + die(_("Server does not support shallow requests")); + + /* Add filter */ + if (server_supports_feature("fetch", "filter", 0) && + args->filter_options.choice) { + print_verbose(args, _("Server supports filter")); + packet_buf_write(&req_buf, "filter %s", + args->filter_options.filter_spec); + } else if (args->filter_options.choice) { + warning("filtering not recognized by server, ignoring"); + } + + /* add wants */ + add_wants(wants, &req_buf); + + if (args->no_dependents) { + packet_buf_write(&req_buf, "done"); + ret = 1; + } else { + /* Add all of the common commits we've found in previous rounds */ + add_common(&req_buf, common); + + /* Add initial haves */ + ret = add_haves(&req_buf, haves_to_send, in_vain); + } + + /* Send request */ + packet_buf_flush(&req_buf); + write_or_die(fd_out, req_buf.buf, req_buf.len); + + strbuf_release(&req_buf); + return ret; +} + +/* + * Processes a section header in a server's response and checks if it matches + * `section`. If the value of `peek` is 1, the header line will be peeked (and + * not consumed); if 0, the line will be consumed and the function will die if + * the section header doesn't match what was expected. + */ +static int process_section_header(struct packet_reader *reader, + const char *section, int peek) +{ + int ret; + + if (packet_reader_peek(reader) != PACKET_READ_NORMAL) + die("error reading section header '%s'", section); + + ret = !strcmp(reader->line, section); + + if (!peek) { + if (!ret) + die("expected '%s', received '%s'", + section, reader->line); + packet_reader_read(reader); + } + + return ret; +} + +static int process_acks(struct packet_reader *reader, struct oidset *common) +{ + /* received */ + int received_ready = 0; + int received_ack = 0; + + process_section_header(reader, "acknowledgments", 0); + while (packet_reader_read(reader) == PACKET_READ_NORMAL) { + const char *arg; + + if (!strcmp(reader->line, "NAK")) + continue; + + if (skip_prefix(reader->line, "ACK ", &arg)) { + struct object_id oid; + if (!get_oid_hex(arg, &oid)) { + struct commit *commit; + oidset_insert(common, &oid); + commit = lookup_commit(&oid); + mark_common(commit, 0, 1); + } + continue; + } + + if (!strcmp(reader->line, "ready")) { + clear_prio_queue(&rev_list); + received_ready = 1; + continue; + } + + die("unexpected acknowledgment line: '%s'", reader->line); + } + + if (reader->status != PACKET_READ_FLUSH && + reader->status != PACKET_READ_DELIM) + die("error processing acks: %d", reader->status); + + /* return 0 if no common, 1 if there are common, or 2 if ready */ + return received_ready ? 2 : (received_ack ? 1 : 0); +} + +static void receive_shallow_info(struct fetch_pack_args *args, + struct packet_reader *reader) +{ + process_section_header(reader, "shallow-info", 0); + while (packet_reader_read(reader) == PACKET_READ_NORMAL) { + const char *arg; + struct object_id oid; + + if (skip_prefix(reader->line, "shallow ", &arg)) { + if (get_oid_hex(arg, &oid)) + die(_("invalid shallow line: %s"), reader->line); + register_shallow(&oid); + continue; + } + if (skip_prefix(reader->line, "unshallow ", &arg)) { + if (get_oid_hex(arg, &oid)) + die(_("invalid unshallow line: %s"), reader->line); + if (!lookup_object(oid.hash)) + die(_("object not found: %s"), reader->line); + /* make sure that it is parsed as shallow */ + if (!parse_object(&oid)) + die(_("error in object: %s"), reader->line); + if (unregister_shallow(&oid)) + die(_("no shallow found: %s"), reader->line); + continue; + } + die(_("expected shallow/unshallow, got %s"), reader->line); + } + + if (reader->status != PACKET_READ_FLUSH && + reader->status != PACKET_READ_DELIM) + die("error processing shallow info: %d", reader->status); + + setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, NULL); + args->deepen = 1; +} + +enum fetch_state { + FETCH_CHECK_LOCAL = 0, + FETCH_SEND_REQUEST, + FETCH_PROCESS_ACKS, + FETCH_GET_PACK, + FETCH_DONE, +}; + +static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args, + int fd[2], + const struct ref *orig_ref, + struct ref **sought, int nr_sought, + char **pack_lockfile) +{ + struct ref *ref = copy_ref_list(orig_ref); + enum fetch_state state = FETCH_CHECK_LOCAL; + struct oidset common = OIDSET_INIT; + struct packet_reader reader; + int in_vain = 0; + int haves_to_send = INITIAL_FLUSH; + packet_reader_init(&reader, fd[0], NULL, 0, + PACKET_READ_CHOMP_NEWLINE); + + while (state != FETCH_DONE) { + switch (state) { + case FETCH_CHECK_LOCAL: + sort_ref_list(&ref, ref_compare_name); + QSORT(sought, nr_sought, cmp_ref_by_name); + + /* v2 supports these by default */ + allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; + use_sideband = 2; + if (args->depth > 0 || args->deepen_since || args->deepen_not) + args->deepen = 1; + + if (marked) + for_each_ref(clear_marks, NULL); + marked = 1; + + for_each_ref(rev_list_insert_ref_oid, NULL); + for_each_cached_alternate(insert_one_alternate_object); + + /* Filter 'ref' by 'sought' and those that aren't local */ + if (everything_local(args, &ref, sought, nr_sought)) + state = FETCH_DONE; + else + state = FETCH_SEND_REQUEST; + break; + case FETCH_SEND_REQUEST: + if (send_fetch_request(fd[1], args, ref, &common, + &haves_to_send, &in_vain)) + state = FETCH_GET_PACK; + else + state = FETCH_PROCESS_ACKS; + break; + case FETCH_PROCESS_ACKS: + /* Process ACKs/NAKs */ + switch (process_acks(&reader, &common)) { + case 2: + state = FETCH_GET_PACK; + break; + case 1: + in_vain = 0; + /* fallthrough */ + default: + state = FETCH_SEND_REQUEST; + break; + } + break; + case FETCH_GET_PACK: + /* Check for shallow-info section */ + if (process_section_header(&reader, "shallow-info", 1)) + receive_shallow_info(args, &reader); + + /* get the pack */ + process_section_header(&reader, "packfile", 0); + if (get_pack(args, fd, pack_lockfile)) + die(_("git fetch-pack: fetch failed.")); + + state = FETCH_DONE; + break; + case FETCH_DONE: + continue; + } + } + + oidset_clear(&common); + return ref; +} + static void fetch_pack_config(void) { git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit); @@ -977,7 +1473,7 @@ static void update_shallow(struct fetch_pack_args *args, struct ref **sought, int nr_sought, struct shallow_info *si) { - struct sha1_array ref = SHA1_ARRAY_INIT; + struct oid_array ref = OID_ARRAY_INIT; int *status; int i; @@ -1000,18 +1496,18 @@ static void update_shallow(struct fetch_pack_args *args, * shallow points that exist in the pack (iow in repo * after get_pack() and reprepare_packed_git()) */ - struct sha1_array extra = SHA1_ARRAY_INIT; - unsigned char (*sha1)[20] = si->shallow->sha1; + struct oid_array extra = OID_ARRAY_INIT; + struct object_id *oid = si->shallow->oid; for (i = 0; i < si->shallow->nr; i++) - if (has_sha1_file(sha1[i])) - sha1_array_append(&extra, sha1[i]); + if (has_object_file(&oid[i])) + oid_array_append(&extra, &oid[i]); if (extra.nr) { setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, &extra); commit_lock_file(&shallow_lock); } - sha1_array_clear(&extra); + oid_array_clear(&extra); return; } @@ -1022,7 +1518,7 @@ static void update_shallow(struct fetch_pack_args *args, if (!si->nr_ours && !si->nr_theirs) return; for (i = 0; i < nr_sought; i++) - sha1_array_append(&ref, sought[i]->old_oid.hash); + oid_array_append(&ref, &sought[i]->old_oid); si->ref = &ref; if (args->update_shallow) { @@ -1032,23 +1528,23 @@ static void update_shallow(struct fetch_pack_args *args, * shallow roots that are actually reachable from new * refs. */ - struct sha1_array extra = SHA1_ARRAY_INIT; - unsigned char (*sha1)[20] = si->shallow->sha1; + struct oid_array extra = OID_ARRAY_INIT; + struct object_id *oid = si->shallow->oid; assign_shallow_commits_to_refs(si, NULL, NULL); if (!si->nr_ours && !si->nr_theirs) { - sha1_array_clear(&ref); + oid_array_clear(&ref); return; } for (i = 0; i < si->nr_ours; i++) - sha1_array_append(&extra, sha1[si->ours[i]]); + oid_array_append(&extra, &oid[si->ours[i]]); for (i = 0; i < si->nr_theirs; i++) - sha1_array_append(&extra, sha1[si->theirs[i]]); + oid_array_append(&extra, &oid[si->theirs[i]]); setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, &extra); commit_lock_file(&shallow_lock); - sha1_array_clear(&extra); - sha1_array_clear(&ref); + oid_array_clear(&extra); + oid_array_clear(&ref); return; } @@ -1064,7 +1560,7 @@ static void update_shallow(struct fetch_pack_args *args, sought[i]->status = REF_STATUS_REJECT_SHALLOW; } free(status); - sha1_array_clear(&ref); + oid_array_clear(&ref); } struct ref *fetch_pack(struct fetch_pack_args *args, @@ -1072,8 +1568,9 @@ struct ref *fetch_pack(struct fetch_pack_args *args, const struct ref *ref, const char *dest, struct ref **sought, int nr_sought, - struct sha1_array *shallow, - char **pack_lockfile) + struct oid_array *shallow, + char **pack_lockfile, + enum protocol_version version) { struct ref *ref_cpy; struct shallow_info si; @@ -1087,10 +1584,37 @@ struct ref *fetch_pack(struct fetch_pack_args *args, die(_("no matching remote head")); } prepare_shallow_info(&si, shallow); - ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, - &si, pack_lockfile); - reprepare_packed_git(); + if (version == protocol_v2) + ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought, + pack_lockfile); + else + ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, + &si, pack_lockfile); + reprepare_packed_git(the_repository); update_shallow(args, sought, nr_sought, &si); clear_shallow_info(&si); return ref_cpy; } + +int report_unmatched_refs(struct ref **sought, int nr_sought) +{ + int i, ret = 0; + + for (i = 0; i < nr_sought; i++) { + if (!sought[i]) + continue; + switch (sought[i]->match_status) { + case REF_MATCHED: + continue; + case REF_NOT_MATCHED: + error(_("no such remote ref %s"), sought[i]->name); + break; + case REF_UNADVERTISED_NOT_ALLOWED: + error(_("Server does not allow request for unadvertised object %s"), + sought[i]->name); + break; + } + ret = 1; + } + return ret; +} |