| #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 "pack.h" |
| #include "sideband.h" |
| #include "fetch-pack.h" |
| #include "remote.h" |
| #include "run-command.h" |
| #include "connect.h" |
| #include "transport.h" |
| #include "version.h" |
| #include "sha1-array.h" |
| #include "oidset.h" |
| #include "packfile.h" |
| #include "object-store.h" |
| #include "connected.h" |
| #include "fetch-negotiator.h" |
| #include "fsck.h" |
| |
| static int transfer_unpack_limit = -1; |
| static int fetch_unpack_limit = -1; |
| static int unpack_limit = 100; |
| static int prefer_ofs_delta = 1; |
| static int no_done; |
| static int deepen_since_ok; |
| 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; |
| static struct strbuf fsck_msg_types = STRBUF_INIT; |
| |
| /* Remember to update object flag allocation in object.h */ |
| #define COMPLETE (1U << 0) |
| #define ALTERNATE (1U << 1) |
| |
| /* |
| * After sending this many "have"s if we do not get any new ACK , we |
| * give up traversing our history. |
| */ |
| #define MAX_IN_VAIN 256 |
| |
| static int multi_ack, use_sideband; |
| /* Allow specifying sha1 if it is a ref tip. */ |
| #define ALLOW_TIP_SHA1 01 |
| /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */ |
| #define ALLOW_REACHABLE_SHA1 02 |
| static unsigned int allow_unadvertised_object_request; |
| |
| __attribute__((format (printf, 2, 3))) |
| static inline void print_verbose(const struct fetch_pack_args *args, |
| const char *fmt, ...) |
| { |
| va_list params; |
| |
| if (!args->verbose) |
| return; |
| |
| va_start(params, fmt); |
| vfprintf(stderr, fmt, params); |
| va_end(params); |
| fputc('\n', stderr); |
| } |
| |
| struct alternate_object_cache { |
| struct object **items; |
| size_t nr, alloc; |
| }; |
| |
| static void cache_one_alternate(const struct object_id *oid, |
| void *vcache) |
| { |
| struct alternate_object_cache *cache = vcache; |
| struct object *obj = parse_object(the_repository, 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(struct fetch_negotiator *negotiator, |
| void (*cb)(struct fetch_negotiator *, |
| 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(negotiator, cache.items[i]); |
| } |
| |
| static int rev_list_insert_ref(struct fetch_negotiator *negotiator, |
| const char *refname, |
| const struct object_id *oid) |
| { |
| struct object *o = deref_tag(the_repository, |
| parse_object(the_repository, oid), |
| refname, 0); |
| |
| if (o && o->type == OBJ_COMMIT) |
| negotiator->add_tip(negotiator, (struct commit *)o); |
| |
| return 0; |
| } |
| |
| 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(cb_data, refname, oid); |
| } |
| |
| enum ack_type { |
| NAK = 0, |
| ACK, |
| ACK_continue, |
| ACK_common, |
| ACK_ready |
| }; |
| |
| static void consume_shallow_list(struct fetch_pack_args *args, |
| struct packet_reader *reader) |
| { |
| if (args->stateless_rpc && args->deepen) { |
| /* If we sent a depth we will get back "duplicate" |
| * shallow and unshallow commands every time there |
| * is a block of have lines exchanged. |
| */ |
| while (packet_reader_read(reader) == PACKET_READ_NORMAL) { |
| if (starts_with(reader->line, "shallow ")) |
| continue; |
| if (starts_with(reader->line, "unshallow ")) |
| continue; |
| die(_("git fetch-pack: expected shallow list")); |
| } |
| if (reader->status != PACKET_READ_FLUSH) |
| die(_("git fetch-pack: expected a flush packet after shallow list")); |
| } |
| } |
| |
| static enum ack_type get_ack(struct packet_reader *reader, |
| struct object_id *result_oid) |
| { |
| int len; |
| const char *arg; |
| |
| if (packet_reader_read(reader) != PACKET_READ_NORMAL) |
| die(_("git fetch-pack: expected ACK/NAK, got a flush packet")); |
| len = reader->pktlen; |
| |
| if (!strcmp(reader->line, "NAK")) |
| return NAK; |
| if (skip_prefix(reader->line, "ACK ", &arg)) { |
| const char *p; |
| if (!parse_oid_hex(arg, result_oid, &p)) { |
| len -= p - reader->line; |
| if (len < 1) |
| return ACK; |
| if (strstr(p, "continue")) |
| return ACK_continue; |
| if (strstr(p, "common")) |
| return ACK_common; |
| if (strstr(p, "ready")) |
| return ACK_ready; |
| return ACK; |
| } |
| } |
| die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line); |
| } |
| |
| static void send_request(struct fetch_pack_args *args, |
| int fd, struct strbuf *buf) |
| { |
| if (args->stateless_rpc) { |
| send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX); |
| packet_flush(fd); |
| } else { |
| if (write_in_full(fd, buf->buf, buf->len) < 0) |
| die_errno(_("unable to write to remote")); |
| } |
| } |
| |
| static void insert_one_alternate_object(struct fetch_negotiator *negotiator, |
| struct object *obj) |
| { |
| rev_list_insert_ref(negotiator, NULL, &obj->oid); |
| } |
| |
| #define INITIAL_FLUSH 16 |
| #define PIPESAFE_FLUSH 32 |
| #define LARGE_FLUSH 16384 |
| |
| static int next_flush(int stateless_rpc, int count) |
| { |
| if (stateless_rpc) { |
| if (count < LARGE_FLUSH) |
| count <<= 1; |
| else |
| count = count * 11 / 10; |
| } else { |
| if (count < PIPESAFE_FLUSH) |
| count <<= 1; |
| else |
| count += PIPESAFE_FLUSH; |
| } |
| return count; |
| } |
| |
| static void mark_tips(struct fetch_negotiator *negotiator, |
| const struct oid_array *negotiation_tips) |
| { |
| int i; |
| |
| if (!negotiation_tips) { |
| for_each_ref(rev_list_insert_ref_oid, negotiator); |
| return; |
| } |
| |
| for (i = 0; i < negotiation_tips->nr; i++) |
| rev_list_insert_ref(negotiator, NULL, |
| &negotiation_tips->oid[i]); |
| return; |
| } |
| |
| static int find_common(struct fetch_negotiator *negotiator, |
| struct fetch_pack_args *args, |
| int fd[2], struct object_id *result_oid, |
| struct ref *refs) |
| { |
| int fetching; |
| int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval; |
| const struct object_id *oid; |
| unsigned in_vain = 0; |
| int got_continue = 0; |
| int got_ready = 0; |
| struct strbuf req_buf = STRBUF_INIT; |
| size_t state_len = 0; |
| struct packet_reader reader; |
| |
| if (args->stateless_rpc && multi_ack == 1) |
| die(_("--stateless-rpc requires multi_ack_detailed")); |
| |
| packet_reader_init(&reader, fd[0], NULL, 0, |
| PACKET_READ_CHOMP_NEWLINE | |
| PACKET_READ_DIE_ON_ERR_PACKET); |
| |
| if (!args->no_dependents) { |
| mark_tips(negotiator, args->negotiation_tips); |
| for_each_cached_alternate(negotiator, insert_one_alternate_object); |
| } |
| |
| fetching = 0; |
| for ( ; refs ; refs = refs->next) { |
| struct object_id *remote = &refs->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. |
| * |
| * Do this only if args->no_dependents is false (if it is true, |
| * we cannot trust the object flags). |
| */ |
| if (!args->no_dependents && |
| ((o = lookup_object(the_repository, remote)) != NULL) && |
| (o->flags & COMPLETE)) { |
| continue; |
| } |
| |
| remote_hex = oid_to_hex(remote); |
| if (!fetching) { |
| struct strbuf c = STRBUF_INIT; |
| if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed"); |
| if (multi_ack == 1) strbuf_addstr(&c, " multi_ack"); |
| if (no_done) strbuf_addstr(&c, " no-done"); |
| if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k"); |
| if (use_sideband == 1) strbuf_addstr(&c, " side-band"); |
| if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative"); |
| if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack"); |
| if (args->no_progress) strbuf_addstr(&c, " no-progress"); |
| if (args->include_tag) strbuf_addstr(&c, " include-tag"); |
| if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta"); |
| if (deepen_since_ok) strbuf_addstr(&c, " deepen-since"); |
| 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 |
| packet_buf_write(&req_buf, "want %s\n", remote_hex); |
| fetching++; |
| } |
| |
| if (!fetching) { |
| strbuf_release(&req_buf); |
| packet_flush(fd[1]); |
| return 1; |
| } |
| |
| if (is_repository_shallow(the_repository)) |
| 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); |
| } |
| } |
| if (server_supports_filtering && args->filter_options.choice) { |
| const char *spec = |
| expand_list_objects_filter_spec(&args->filter_options); |
| packet_buf_write(&req_buf, "filter %s", spec); |
| } |
| packet_buf_flush(&req_buf); |
| state_len = req_buf.len; |
| |
| if (args->deepen) { |
| const char *arg; |
| struct object_id oid; |
| |
| send_request(args, fd[1], &req_buf); |
| while (packet_reader_read(&reader) == PACKET_READ_NORMAL) { |
| if (skip_prefix(reader.line, "shallow ", &arg)) { |
| if (get_oid_hex(arg, &oid)) |
| die(_("invalid shallow line: %s"), reader.line); |
| register_shallow(the_repository, &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(the_repository, &oid)) |
| die(_("object not found: %s"), reader.line); |
| /* make sure that it is parsed as shallow */ |
| if (!parse_object(the_repository, &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); |
| } |
| } else if (!args->stateless_rpc) |
| send_request(args, fd[1], &req_buf); |
| |
| if (!args->stateless_rpc) { |
| /* If we aren't using the stateless-rpc interface |
| * we don't need to retain the headers. |
| */ |
| strbuf_setlen(&req_buf, 0); |
| state_len = 0; |
| } |
| |
| trace2_region_enter("fetch-pack", "negotiation_v0_v1", the_repository); |
| flushes = 0; |
| retval = -1; |
| if (args->no_dependents) |
| goto done; |
| while ((oid = negotiator->next(negotiator))) { |
| 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; |
| |
| packet_buf_flush(&req_buf); |
| send_request(args, fd[1], &req_buf); |
| strbuf_setlen(&req_buf, state_len); |
| flushes++; |
| flush_at = next_flush(args->stateless_rpc, count); |
| |
| /* |
| * We keep one window "ahead" of the other side, and |
| * will wait for an ACK only on the next one |
| */ |
| if (!args->stateless_rpc && count == INITIAL_FLUSH) |
| continue; |
| |
| consume_shallow_list(args, &reader); |
| do { |
| ack = get_ack(&reader, result_oid); |
| if (ack) |
| print_verbose(args, _("got %s %d %s"), "ack", |
| ack, oid_to_hex(result_oid)); |
| switch (ack) { |
| case ACK: |
| flushes = 0; |
| multi_ack = 0; |
| retval = 0; |
| goto done; |
| case ACK_common: |
| case ACK_ready: |
| case ACK_continue: { |
| struct commit *commit = |
| lookup_commit(the_repository, |
| result_oid); |
| int was_common; |
| |
| if (!commit) |
| die(_("invalid commit %s"), oid_to_hex(result_oid)); |
| was_common = negotiator->ack(negotiator, commit); |
| if (args->stateless_rpc |
| && ack == ACK_common |
| && !was_common) { |
| /* We need to replay the have for this object |
| * on the next RPC request so the peer knows |
| * it is in common with us. |
| */ |
| const char *hex = oid_to_hex(result_oid); |
| packet_buf_write(&req_buf, "have %s\n", hex); |
| state_len = req_buf.len; |
| /* |
| * Reset in_vain because an ack |
| * for this commit has not been |
| * seen. |
| */ |
| in_vain = 0; |
| } else if (!args->stateless_rpc |
| || ack != ACK_common) |
| in_vain = 0; |
| retval = 0; |
| got_continue = 1; |
| if (ack == ACK_ready) |
| got_ready = 1; |
| break; |
| } |
| } |
| } while (ack); |
| flushes--; |
| if (got_continue && MAX_IN_VAIN < in_vain) { |
| print_verbose(args, _("giving up")); |
| break; /* give up */ |
| } |
| if (got_ready) |
| break; |
| } |
| } |
| done: |
| trace2_region_leave("fetch-pack", "negotiation_v0_v1", the_repository); |
| if (!got_ready || !no_done) { |
| packet_buf_write(&req_buf, "done\n"); |
| send_request(args, fd[1], &req_buf); |
| } |
| print_verbose(args, _("done")); |
| if (retval != 0) { |
| multi_ack = 0; |
| flushes++; |
| } |
| strbuf_release(&req_buf); |
| |
| if (!got_ready || !no_done) |
| consume_shallow_list(args, &reader); |
| while (flushes || multi_ack) { |
| int ack = get_ack(&reader, result_oid); |
| if (ack) { |
| print_verbose(args, _("got %s (%d) %s"), "ack", |
| ack, oid_to_hex(result_oid)); |
| if (ack == ACK) |
| return 0; |
| multi_ack = 1; |
| continue; |
| } |
| flushes--; |
| } |
| /* it is no error to fetch into a completely empty repo */ |
| return count ? retval : 0; |
| } |
| |
| static struct commit_list *complete; |
| |
| static int mark_complete(const struct object_id *oid) |
| { |
| struct object *o = parse_object(the_repository, 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(the_repository, &t->tagged->oid); |
| } |
| if (o && o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!(commit->object.flags & COMPLETE)) { |
| commit->object.flags |= COMPLETE; |
| commit_list_insert(commit, &complete); |
| } |
| } |
| return 0; |
| } |
| |
| static int mark_complete_oid(const char *refname, const struct object_id *oid, |
| int flag, void *cb_data) |
| { |
| return mark_complete(oid); |
| } |
| |
| static void mark_recent_complete_commits(struct fetch_pack_args *args, |
| timestamp_t cutoff) |
| { |
| while (complete && cutoff <= complete->item->date) { |
| print_verbose(args, _("Marking %s as complete"), |
| oid_to_hex(&complete->item->object.oid)); |
| pop_most_recent_commit(&complete, COMPLETE); |
| } |
| } |
| |
| 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 is_unmatched_ref(const struct ref *ref) |
| { |
| struct object_id oid; |
| const char *p; |
| return ref->match_status == REF_NOT_MATCHED && |
| !parse_oid_hex(ref->name, &oid, &p) && |
| *p == '\0' && |
| oideq(&oid, &ref->old_oid); |
| } |
| |
| 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; |
| int strict = !(allow_unadvertised_object_request & |
| (ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1)); |
| |
| i = 0; |
| for (ref = *refs; ref; ref = next) { |
| int keep = 0; |
| next = ref->next; |
| |
| if (starts_with(ref->name, "refs/") && |
| check_refname_format(ref->name, 0)) { |
| /* |
| * trash or a peeled value; do not even add it to |
| * unmatched list |
| */ |
| free_one_ref(ref); |
| continue; |
| } else { |
| while (i < nr_sought) { |
| int cmp = strcmp(ref->name, sought[i]->name); |
| if (cmp < 0) |
| break; /* definitely do not have it */ |
| else if (cmp == 0) { |
| keep = 1; /* definitely have it */ |
| sought[i]->match_status = REF_MATCHED; |
| } |
| i++; |
| } |
| |
| if (!keep && args->fetch_all && |
| (!args->deepen || !starts_with(ref->name, "refs/tags/"))) |
| keep = 1; |
| } |
| |
| if (keep) { |
| *newtail = ref; |
| ref->next = NULL; |
| newtail = &ref->next; |
| } else { |
| ref->next = unmatched; |
| unmatched = ref; |
| } |
| } |
| |
| if (strict) { |
| for (i = 0; i < nr_sought; i++) { |
| ref = sought[i]; |
| if (!is_unmatched_ref(ref)) |
| continue; |
| |
| add_refs_to_oidset(&tip_oids, unmatched); |
| add_refs_to_oidset(&tip_oids, newlist); |
| break; |
| } |
| } |
| |
| /* Append unmatched requests to the list */ |
| for (i = 0; i < nr_sought; i++) { |
| ref = sought[i]; |
| if (!is_unmatched_ref(ref)) |
| continue; |
| |
| if (!strict || oidset_contains(&tip_oids, &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); |
| free_refs(unmatched); |
| |
| *refs = newlist; |
| } |
| |
| static void mark_alternate_complete(struct fetch_negotiator *unused, |
| struct object *obj) |
| { |
| mark_complete(&obj->oid); |
| } |
| |
| struct loose_object_iter { |
| struct oidset *loose_object_set; |
| struct ref *refs; |
| }; |
| |
| /* |
| * Mark recent commits available locally and reachable from a local ref as |
| * COMPLETE. If args->no_dependents is false, also mark COMPLETE remote refs as |
| * COMMON_REF (otherwise, we are not planning to participate in negotiation, and |
| * thus do not need COMMON_REF marks). |
| * |
| * The cutoff time for recency is determined by this heuristic: it is the |
| * earliest commit time of the objects in refs that are commits and that we know |
| * the commit time of. |
| */ |
| static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator, |
| struct fetch_pack_args *args, |
| struct ref **refs) |
| { |
| struct ref *ref; |
| int old_save_commit_buffer = save_commit_buffer; |
| timestamp_t cutoff = 0; |
| |
| save_commit_buffer = 0; |
| |
| trace2_region_enter("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL); |
| for (ref = *refs; ref; ref = ref->next) { |
| struct object *o; |
| |
| if (!has_object_file_with_flags(&ref->old_oid, |
| OBJECT_INFO_QUICK | |
| OBJECT_INFO_SKIP_FETCH_OBJECT)) |
| continue; |
| o = parse_object(the_repository, &ref->old_oid); |
| if (!o) |
| continue; |
| |
| /* |
| * We already have it -- which may mean that we were |
| * in sync with the other side at some time after |
| * that (it is OK if we guess wrong here). |
| */ |
| if (o->type == OBJ_COMMIT) { |
| struct commit *commit = (struct commit *)o; |
| if (!cutoff || cutoff < commit->date) |
| cutoff = commit->date; |
| } |
| } |
| trace2_region_leave("fetch-pack", "parse_remote_refs_and_find_cutoff", NULL); |
| |
| /* |
| * This block marks all local refs as COMPLETE, and then recursively marks all |
| * parents of those refs as COMPLETE. |
| */ |
| trace2_region_enter("fetch-pack", "mark_complete_local_refs", NULL); |
| if (!args->deepen) { |
| for_each_ref(mark_complete_oid, NULL); |
| for_each_cached_alternate(NULL, mark_alternate_complete); |
| commit_list_sort_by_date(&complete); |
| if (cutoff) |
| mark_recent_complete_commits(args, cutoff); |
| } |
| trace2_region_leave("fetch-pack", "mark_complete_local_refs", NULL); |
| |
| /* |
| * Mark all complete remote refs as common refs. |
| * Don't mark them common yet; the server has to be told so first. |
| */ |
| trace2_region_enter("fetch-pack", "mark_common_remote_refs", NULL); |
| for (ref = *refs; ref; ref = ref->next) { |
| struct object *o = deref_tag(the_repository, |
| lookup_object(the_repository, |
| &ref->old_oid), |
| NULL, 0); |
| |
| if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE)) |
| continue; |
| |
| negotiator->known_common(negotiator, |
| (struct commit *)o); |
| } |
| trace2_region_leave("fetch-pack", "mark_common_remote_refs", NULL); |
| |
| save_commit_buffer = old_save_commit_buffer; |
| } |
| |
| /* |
| * Returns 1 if every object pointed to by the given remote refs is available |
| * locally and reachable from a local ref, and 0 otherwise. |
| */ |
| static int everything_local(struct fetch_pack_args *args, |
| struct ref **refs) |
| { |
| struct ref *ref; |
| int retval; |
| |
| for (retval = 1, ref = *refs; ref ; ref = ref->next) { |
| const struct object_id *remote = &ref->old_oid; |
| struct object *o; |
| |
| o = lookup_object(the_repository, remote); |
| if (!o || !(o->flags & COMPLETE)) { |
| retval = 0; |
| print_verbose(args, "want %s (%s)", oid_to_hex(remote), |
| ref->name); |
| continue; |
| } |
| print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote), |
| ref->name); |
| } |
| |
| return retval; |
| } |
| |
| static int sideband_demux(int in, int out, void *data) |
| { |
| int *xd = data; |
| int ret; |
| |
| ret = recv_sideband("fetch-pack", xd[0], out); |
| close(out); |
| return ret; |
| } |
| |
| static void write_promisor_file(const char *keep_name, |
| struct ref **sought, int nr_sought) |
| { |
| struct strbuf promisor_name = STRBUF_INIT; |
| int suffix_stripped; |
| FILE *output; |
| int i; |
| |
| strbuf_addstr(&promisor_name, keep_name); |
| suffix_stripped = strbuf_strip_suffix(&promisor_name, ".keep"); |
| if (!suffix_stripped) |
| BUG("name of pack lockfile should end with .keep (was '%s')", |
| keep_name); |
| strbuf_addstr(&promisor_name, ".promisor"); |
| |
| output = xfopen(promisor_name.buf, "w"); |
| for (i = 0; i < nr_sought; i++) |
| fprintf(output, "%s %s\n", oid_to_hex(&sought[i]->old_oid), |
| sought[i]->name); |
| fclose(output); |
| |
| strbuf_release(&promisor_name); |
| } |
| |
| static int get_pack(struct fetch_pack_args *args, |
| int xd[2], char **pack_lockfile, |
| struct ref **sought, int nr_sought) |
| { |
| struct async demux; |
| int do_keep = args->keep_pack; |
| const char *cmd_name; |
| struct pack_header header; |
| int pass_header = 0; |
| struct child_process cmd = CHILD_PROCESS_INIT; |
| int ret; |
| |
| memset(&demux, 0, sizeof(demux)); |
| if (use_sideband) { |
| /* xd[] is talking with upload-pack; subprocess reads from |
| * xd[0], spits out band#2 to stderr, and feeds us band#1 |
| * through demux->out. |
| */ |
| demux.proc = sideband_demux; |
| demux.data = xd; |
| demux.out = -1; |
| demux.isolate_sigpipe = 1; |
| if (start_async(&demux)) |
| die(_("fetch-pack: unable to fork off sideband demultiplexer")); |
| } |
| else |
| demux.out = xd[0]; |
| |
| if (!args->keep_pack && unpack_limit) { |
| |
| if (read_pack_header(demux.out, &header)) |
| die(_("protocol error: bad pack header")); |
| pass_header = 1; |
| if (ntohl(header.hdr_entries) < unpack_limit) |
| do_keep = 0; |
| else |
| do_keep = 1; |
| } |
| |
| if (alternate_shallow_file) { |
| argv_array_push(&cmd.args, "--shallow-file"); |
| argv_array_push(&cmd.args, alternate_shallow_file); |
| } |
| |
| if (do_keep || args->from_promisor) { |
| if (pack_lockfile) |
| cmd.out = -1; |
| cmd_name = "index-pack"; |
| argv_array_push(&cmd.args, cmd_name); |
| argv_array_push(&cmd.args, "--stdin"); |
| if (!args->quiet && !args->no_progress) |
| argv_array_push(&cmd.args, "-v"); |
| if (args->use_thin_pack) |
| argv_array_push(&cmd.args, "--fix-thin"); |
| 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", |
| (uintmax_t)getpid(), hostname); |
| } |
| if (args->check_self_contained_and_connected) |
| argv_array_push(&cmd.args, "--check-self-contained-and-connected"); |
| /* |
| * If we're obtaining the filename of a lockfile, we'll use |
| * that filename to write a .promisor file with more |
| * information below. If not, we need index-pack to do it for |
| * us. |
| */ |
| if (!(do_keep && pack_lockfile) && args->from_promisor) |
| argv_array_push(&cmd.args, "--promisor"); |
| } |
| else { |
| cmd_name = "unpack-objects"; |
| argv_array_push(&cmd.args, cmd_name); |
| if (args->quiet || args->no_progress) |
| argv_array_push(&cmd.args, "-q"); |
| args->check_self_contained_and_connected = 0; |
| } |
| |
| if (pass_header) |
| argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32, |
| ntohl(header.hdr_version), |
| ntohl(header.hdr_entries)); |
| if (fetch_fsck_objects >= 0 |
| ? fetch_fsck_objects |
| : transfer_fsck_objects >= 0 |
| ? transfer_fsck_objects |
| : 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_pushf(&cmd.args, "--strict%s", |
| fsck_msg_types.buf); |
| } |
| |
| cmd.in = demux.out; |
| cmd.git_cmd = 1; |
| if (start_command(&cmd)) |
| die(_("fetch-pack: unable to fork off %s"), cmd_name); |
| if (do_keep && pack_lockfile) { |
| *pack_lockfile = index_pack_lockfile(cmd.out); |
| close(cmd.out); |
| } |
| |
| if (!use_sideband) |
| /* Closed by start_command() */ |
| xd[0] = -1; |
| |
| ret = finish_command(&cmd); |
| if (!ret || (args->check_self_contained_and_connected && ret == 1)) |
| args->self_contained_and_connected = |
| args->check_self_contained_and_connected && |
| ret == 0; |
| else |
| die(_("%s failed"), cmd_name); |
| if (use_sideband && finish_async(&demux)) |
| die(_("error in sideband demultiplexer")); |
| |
| /* |
| * Now that index-pack has succeeded, write the promisor file using the |
| * obtained .keep filename if necessary |
| */ |
| if (do_keep && pack_lockfile && args->from_promisor) |
| write_promisor_file(*pack_lockfile, sought, nr_sought); |
| |
| return 0; |
| } |
| |
| static int cmp_ref_by_name(const void *a_, const void *b_) |
| { |
| const struct ref *a = *((const struct ref **)a_); |
| const struct ref *b = *((const struct ref **)b_); |
| return strcmp(a->name, b->name); |
| } |
| |
| static struct ref *do_fetch_pack(struct fetch_pack_args *args, |
| int fd[2], |
| const struct ref *orig_ref, |
| struct ref **sought, int nr_sought, |
| struct shallow_info *si, |
| char **pack_lockfile) |
| { |
| struct repository *r = the_repository; |
| struct ref *ref = copy_ref_list(orig_ref); |
| struct object_id oid; |
| const char *agent_feature; |
| int agent_len; |
| struct fetch_negotiator negotiator_alloc; |
| struct fetch_negotiator *negotiator; |
| |
| if (args->no_dependents) { |
| negotiator = NULL; |
| } else { |
| negotiator = &negotiator_alloc; |
| fetch_negotiator_init(r, negotiator); |
| } |
| |
| sort_ref_list(&ref, ref_compare_name); |
| QSORT(sought, nr_sought, cmp_ref_by_name); |
| |
| if ((agent_feature = server_feature_value("agent", &agent_len))) { |
| agent_supported = 1; |
| if (agent_len) |
| print_verbose(args, _("Server version is %.*s"), |
| agent_len, agent_feature); |
| } |
| |
| if (server_supports("shallow")) |
| print_verbose(args, _("Server supports %s"), "shallow"); |
| else if (args->depth > 0 || is_repository_shallow(r)) |
| die(_("Server does not support shallow clients")); |
| if (args->depth > 0 || args->deepen_since || args->deepen_not) |
| args->deepen = 1; |
| if (server_supports("multi_ack_detailed")) { |
| print_verbose(args, _("Server supports %s"), "multi_ack_detailed"); |
| multi_ack = 2; |
| if (server_supports("no-done")) { |
| print_verbose(args, _("Server supports %s"), "no-done"); |
| if (args->stateless_rpc) |
| no_done = 1; |
| } |
| } |
| else if (server_supports("multi_ack")) { |
| print_verbose(args, _("Server supports %s"), "multi_ack"); |
| multi_ack = 1; |
| } |
| if (server_supports("side-band-64k")) { |
| print_verbose(args, _("Server supports %s"), "side-band-64k"); |
| use_sideband = 2; |
| } |
| else if (server_supports("side-band")) { |
| print_verbose(args, _("Server supports %s"), "side-band"); |
| use_sideband = 1; |
| } |
| if (server_supports("allow-tip-sha1-in-want")) { |
| print_verbose(args, _("Server supports %s"), "allow-tip-sha1-in-want"); |
| allow_unadvertised_object_request |= ALLOW_TIP_SHA1; |
| } |
| if (server_supports("allow-reachable-sha1-in-want")) { |
| print_verbose(args, _("Server supports %s"), "allow-reachable-sha1-in-want"); |
| allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1; |
| } |
| if (server_supports("thin-pack")) |
| print_verbose(args, _("Server supports %s"), "thin-pack"); |
| else |
| args->use_thin_pack = 0; |
| if (server_supports("no-progress")) |
| print_verbose(args, _("Server supports %s"), "no-progress"); |
| else |
| args->no_progress = 0; |
| if (server_supports("include-tag")) |
| print_verbose(args, _("Server supports %s"), "include-tag"); |
| else |
| args->include_tag = 0; |
| if (server_supports("ofs-delta")) |
| print_verbose(args, _("Server supports %s"), "ofs-delta"); |
| else |
| prefer_ofs_delta = 0; |
| |
| if (server_supports("filter")) { |
| server_supports_filtering = 1; |
| print_verbose(args, _("Server supports %s"), "filter"); |
| } else if (args->filter_options.choice) { |
| warning("filtering not recognized by server, ignoring"); |
| } |
| |
| if (server_supports("deepen-since")) { |
| print_verbose(args, _("Server supports %s"), "deepen-since"); |
| deepen_since_ok = 1; |
| } else if (args->deepen_since) |
| die(_("Server does not support --shallow-since")); |
| if (server_supports("deepen-not")) { |
| print_verbose(args, _("Server supports %s"), "deepen-not"); |
| deepen_not_ok = 1; |
| } else if (args->deepen_not) |
| die(_("Server does not support --shallow-exclude")); |
| if (server_supports("deepen-relative")) |
| print_verbose(args, _("Server supports %s"), "deepen-relative"); |
| else if (args->deepen_relative) |
| die(_("Server does not support --deepen")); |
| |
| if (!args->no_dependents) { |
| mark_complete_and_common_ref(negotiator, args, &ref); |
| filter_refs(args, &ref, sought, nr_sought); |
| if (everything_local(args, &ref)) { |
| packet_flush(fd[1]); |
| goto all_done; |
| } |
| } else { |
| filter_refs(args, &ref, sought, nr_sought); |
| } |
| if (find_common(negotiator, args, fd, &oid, ref) < 0) |
| if (!args->keep_pack) |
| /* When cloning, it is not unusual to have |
| * no common commit. |
| */ |
| warning(_("no common commits")); |
| |
| if (args->stateless_rpc) |
| packet_flush(fd[1]); |
| if (args->deepen) |
| setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, |
| NULL); |
| else if (si->nr_ours || si->nr_theirs) |
| alternate_shallow_file = setup_temporary_shallow(si->shallow); |
| else |
| alternate_shallow_file = NULL; |
| if (get_pack(args, fd, pack_lockfile, sought, nr_sought)) |
| die(_("git fetch-pack: fetch failed.")); |
| |
| all_done: |
| if (negotiator) |
| negotiator->release(negotiator); |
| return ref; |
| } |
| |
| static void add_shallow_requests(struct strbuf *req_buf, |
| const struct fetch_pack_args *args) |
| { |
| if (is_repository_shallow(the_repository)) |
| 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); |
| } |
| } |
| if (args->deepen_relative) |
| packet_buf_write(req_buf, "deepen-relative\n"); |
| } |
| |
| static void add_wants(int no_dependents, const struct ref *wants, struct strbuf *req_buf) |
| { |
| int use_ref_in_want = server_supports_feature("fetch", "ref-in-want", 0); |
| |
| for ( ; wants ; wants = wants->next) { |
| const struct object_id *remote = &wants->old_oid; |
| 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. |
| * |
| * Do this only if args->no_dependents is false (if it is true, |
| * we cannot trust the object flags). |
| */ |
| if (!no_dependents && |
| ((o = lookup_object(the_repository, remote)) != NULL) && |
| (o->flags & COMPLETE)) { |
| continue; |
| } |
| |
| if (!use_ref_in_want || wants->exact_oid) |
| packet_buf_write(req_buf, "want %s\n", oid_to_hex(remote)); |
| else |
| packet_buf_write(req_buf, "want-ref %s\n", wants->name); |
| } |
| } |
| |
| 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 fetch_negotiator *negotiator, |
| 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 = negotiator->next(negotiator))) { |
| 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(struct fetch_negotiator *negotiator, int fd_out, |
| struct fetch_pack_args *args, |
| const struct ref *wants, struct oidset *common, |
| int *haves_to_send, int *in_vain, |
| int sideband_all) |
| { |
| 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_buf_write(&req_buf, "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"); |
| if (sideband_all) |
| packet_buf_write(&req_buf, "sideband-all"); |
| |
| /* Add shallow-info and deepen request */ |
| if (server_supports_feature("fetch", "shallow", 0)) |
| add_shallow_requests(&req_buf, args); |
| else if (is_repository_shallow(the_repository) || args->deepen) |
| die(_("Server does not support shallow requests")); |
| |
| /* Add filter */ |
| if (server_supports_feature("fetch", "filter", 0) && |
| args->filter_options.choice) { |
| const char *spec = |
| expand_list_objects_filter_spec(&args->filter_options); |
| print_verbose(args, _("Server supports filter")); |
| packet_buf_write(&req_buf, "filter %s", spec); |
| } else if (args->filter_options.choice) { |
| warning("filtering not recognized by server, ignoring"); |
| } |
| |
| /* add wants */ |
| add_wants(args->no_dependents, 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(negotiator, &req_buf, haves_to_send, in_vain); |
| } |
| |
| /* Send request */ |
| packet_buf_flush(&req_buf); |
| if (write_in_full(fd_out, req_buf.buf, req_buf.len) < 0) |
| die_errno(_("unable to write request to remote")); |
| |
| 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 fetch_negotiator *negotiator, |
| 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(the_repository, &oid); |
| if (negotiator) |
| negotiator->ack(negotiator, commit); |
| } |
| continue; |
| } |
| |
| if (!strcmp(reader->line, "ready")) { |
| 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); |
| |
| /* |
| * If an "acknowledgments" section is sent, a packfile is sent if and |
| * only if "ready" was sent in this section. The other sections |
| * ("shallow-info" and "wanted-refs") are sent only if a packfile is |
| * sent. Therefore, a DELIM is expected if "ready" is sent, and a FLUSH |
| * otherwise. |
| */ |
| if (received_ready && reader->status != PACKET_READ_DELIM) |
| die(_("expected packfile to be sent after 'ready'")); |
| if (!received_ready && reader->status != PACKET_READ_FLUSH) |
| die(_("expected no other sections to be sent after no 'ready'")); |
| |
| /* 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, |
| struct oid_array *shallows, |
| struct shallow_info *si) |
| { |
| int unshallow_received = 0; |
| |
| 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); |
| oid_array_append(shallows, &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(the_repository, &oid)) |
| die(_("object not found: %s"), reader->line); |
| /* make sure that it is parsed as shallow */ |
| if (!parse_object(the_repository, &oid)) |
| die(_("error in object: %s"), reader->line); |
| if (unregister_shallow(&oid)) |
| die(_("no shallow found: %s"), reader->line); |
| unshallow_received = 1; |
| 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); |
| |
| if (args->deepen || unshallow_received) { |
| /* |
| * Treat these as shallow lines caused by our depth settings. |
| * In v0, these lines cannot cause refs to be rejected; do the |
| * same. |
| */ |
| int i; |
| |
| for (i = 0; i < shallows->nr; i++) |
| register_shallow(the_repository, &shallows->oid[i]); |
| setup_alternate_shallow(&shallow_lock, &alternate_shallow_file, |
| NULL); |
| args->deepen = 1; |
| } else if (shallows->nr) { |
| /* |
| * Treat these as shallow lines caused by the remote being |
| * shallow. In v0, remote refs that reach these objects are |
| * rejected (unless --update-shallow is set); do the same. |
| */ |
| prepare_shallow_info(si, shallows); |
| if (si->nr_ours || si->nr_theirs) |
| alternate_shallow_file = |
| setup_temporary_shallow(si->shallow); |
| else |
| alternate_shallow_file = NULL; |
| } else { |
| alternate_shallow_file = NULL; |
| } |
| } |
| |
| static int cmp_name_ref(const void *name, const void *ref) |
| { |
| return strcmp(name, (*(struct ref **)ref)->name); |
| } |
| |
| static void receive_wanted_refs(struct packet_reader *reader, |
| struct ref **sought, int nr_sought) |
| { |
| process_section_header(reader, "wanted-refs", 0); |
| while (packet_reader_read(reader) == PACKET_READ_NORMAL) { |
| struct object_id oid; |
| const char *end; |
| struct ref **found; |
| |
| if (parse_oid_hex(reader->line, &oid, &end) || *end++ != ' ') |
| die(_("expected wanted-ref, got '%s'"), reader->line); |
| |
| found = bsearch(end, sought, nr_sought, sizeof(*sought), |
| cmp_name_ref); |
| if (!found) |
| die(_("unexpected wanted-ref: '%s'"), reader->line); |
| oidcpy(&(*found)->old_oid, &oid); |
| } |
| |
| if (reader->status != PACKET_READ_DELIM) |
| die(_("error processing wanted refs: %d"), reader->status); |
| } |
| |
| 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, |
| struct oid_array *shallows, |
| struct shallow_info *si, |
| char **pack_lockfile) |
| { |
| struct repository *r = the_repository; |
| 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, negotiation_started = 0; |
| int haves_to_send = INITIAL_FLUSH; |
| struct fetch_negotiator negotiator_alloc; |
| struct fetch_negotiator *negotiator; |
| |
| if (args->no_dependents) { |
| negotiator = NULL; |
| } else { |
| negotiator = &negotiator_alloc; |
| fetch_negotiator_init(r, negotiator); |
| } |
| |
| packet_reader_init(&reader, fd[0], NULL, 0, |
| PACKET_READ_CHOMP_NEWLINE | |
| PACKET_READ_DIE_ON_ERR_PACKET); |
| if (git_env_bool("GIT_TEST_SIDEBAND_ALL", 1) && |
| server_supports_feature("fetch", "sideband-all", 0)) { |
| reader.use_sideband = 1; |
| reader.me = "fetch-pack"; |
| } |
| |
| 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; |
| |
| /* Filter 'ref' by 'sought' and those that aren't local */ |
| if (!args->no_dependents) { |
| mark_complete_and_common_ref(negotiator, args, &ref); |
| filter_refs(args, &ref, sought, nr_sought); |
| if (everything_local(args, &ref)) |
| state = FETCH_DONE; |
| else |
| state = FETCH_SEND_REQUEST; |
| |
| mark_tips(negotiator, args->negotiation_tips); |
| for_each_cached_alternate(negotiator, |
| insert_one_alternate_object); |
| } else { |
| filter_refs(args, &ref, sought, nr_sought); |
| state = FETCH_SEND_REQUEST; |
| } |
| break; |
| case FETCH_SEND_REQUEST: |
| if (!negotiation_started) { |
| negotiation_started = 1; |
| trace2_region_enter("fetch-pack", |
| "negotiation_v2", |
| the_repository); |
| } |
| if (send_fetch_request(negotiator, fd[1], args, ref, |
| &common, |
| &haves_to_send, &in_vain, |
| reader.use_sideband)) |
| state = FETCH_GET_PACK; |
| else |
| state = FETCH_PROCESS_ACKS; |
| break; |
| case FETCH_PROCESS_ACKS: |
| /* Process ACKs/NAKs */ |
| switch (process_acks(negotiator, &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: |
| trace2_region_leave("fetch-pack", |
| "negotiation_v2", |
| the_repository); |
| /* Check for shallow-info section */ |
| if (process_section_header(&reader, "shallow-info", 1)) |
| receive_shallow_info(args, &reader, shallows, si); |
| |
| if (process_section_header(&reader, "wanted-refs", 1)) |
| receive_wanted_refs(&reader, sought, nr_sought); |
| |
| /* get the pack */ |
| process_section_header(&reader, "packfile", 0); |
| if (get_pack(args, fd, pack_lockfile, sought, nr_sought)) |
| die(_("git fetch-pack: fetch failed.")); |
| |
| state = FETCH_DONE; |
| break; |
| case FETCH_DONE: |
| continue; |
| } |
| } |
| |
| if (negotiator) |
| negotiator->release(negotiator); |
| oidset_clear(&common); |
| return ref; |
| } |
| |
| static int fetch_pack_config_cb(const char *var, const char *value, void *cb) |
| { |
| if (strcmp(var, "fetch.fsck.skiplist") == 0) { |
| const char *path; |
| |
| if (git_config_pathname(&path, var, value)) |
| return 1; |
| strbuf_addf(&fsck_msg_types, "%cskiplist=%s", |
| fsck_msg_types.len ? ',' : '=', path); |
| free((char *)path); |
| return 0; |
| } |
| |
| if (skip_prefix(var, "fetch.fsck.", &var)) { |
| if (is_valid_msg_type(var, value)) |
| strbuf_addf(&fsck_msg_types, "%c%s=%s", |
| fsck_msg_types.len ? ',' : '=', var, value); |
| else |
| warning("Skipping unknown msg id '%s'", var); |
| return 0; |
| } |
| |
| return git_default_config(var, value, cb); |
| } |
| |
| static void fetch_pack_config(void) |
| { |
| git_config_get_int("fetch.unpacklimit", &fetch_unpack_limit); |
| git_config_get_int("transfer.unpacklimit", &transfer_unpack_limit); |
| git_config_get_bool("repack.usedeltabaseoffset", &prefer_ofs_delta); |
| git_config_get_bool("fetch.fsckobjects", &fetch_fsck_objects); |
| git_config_get_bool("transfer.fsckobjects", &transfer_fsck_objects); |
| |
| git_config(fetch_pack_config_cb, NULL); |
| } |
| |
| static void fetch_pack_setup(void) |
| { |
| static int did_setup; |
| if (did_setup) |
| return; |
| fetch_pack_config(); |
| if (0 <= transfer_unpack_limit) |
| unpack_limit = transfer_unpack_limit; |
| else if (0 <= fetch_unpack_limit) |
| unpack_limit = fetch_unpack_limit; |
| did_setup = 1; |
| } |
| |
| static int remove_duplicates_in_refs(struct ref **ref, int nr) |
| { |
| struct string_list names = STRING_LIST_INIT_NODUP; |
| int src, dst; |
| |
| for (src = dst = 0; src < nr; src++) { |
| struct string_list_item *item; |
| item = string_list_insert(&names, ref[src]->name); |
| if (item->util) |
| continue; /* already have it */ |
| item->util = ref[src]; |
| if (src != dst) |
| ref[dst] = ref[src]; |
| dst++; |
| } |
| for (src = dst; src < nr; src++) |
| ref[src] = NULL; |
| string_list_clear(&names, 0); |
| return dst; |
| } |
| |
| static void update_shallow(struct fetch_pack_args *args, |
| struct ref **sought, int nr_sought, |
| struct shallow_info *si) |
| { |
| struct oid_array ref = OID_ARRAY_INIT; |
| int *status; |
| int i; |
| |
| if (args->deepen && alternate_shallow_file) { |
| if (*alternate_shallow_file == '\0') { /* --unshallow */ |
| unlink_or_warn(git_path_shallow(the_repository)); |
| rollback_lock_file(&shallow_lock); |
| } else |
| commit_lock_file(&shallow_lock); |
| alternate_shallow_file = NULL; |
| return; |
| } |
| |
| if (!si->shallow || !si->shallow->nr) |
| return; |
| |
| if (args->cloning) { |
| /* |
| * remote is shallow, but this is a clone, there are |
| * no objects in repo to worry about. Accept any |
| * shallow points that exist in the pack (iow in repo |
| * after get_pack() and reprepare_packed_git()) |
| */ |
| struct oid_array extra = OID_ARRAY_INIT; |
| struct object_id *oid = si->shallow->oid; |
| for (i = 0; i < si->shallow->nr; 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); |
| alternate_shallow_file = NULL; |
| } |
| oid_array_clear(&extra); |
| return; |
| } |
| |
| if (!si->nr_ours && !si->nr_theirs) |
| return; |
| |
| remove_nonexistent_theirs_shallow(si); |
| if (!si->nr_ours && !si->nr_theirs) |
| return; |
| for (i = 0; i < nr_sought; i++) |
| oid_array_append(&ref, &sought[i]->old_oid); |
| si->ref = &ref; |
| |
| if (args->update_shallow) { |
| /* |
| * remote is also shallow, .git/shallow may be updated |
| * so all refs can be accepted. Make sure we only add |
| * shallow roots that are actually reachable from new |
| * refs. |
| */ |
| 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) { |
| oid_array_clear(&ref); |
| return; |
| } |
| for (i = 0; i < si->nr_ours; i++) |
| oid_array_append(&extra, &oid[si->ours[i]]); |
| for (i = 0; i < si->nr_theirs; i++) |
| oid_array_append(&extra, &oid[si->theirs[i]]); |
| setup_alternate_shallow(&shallow_lock, |
| &alternate_shallow_file, |
| &extra); |
| commit_lock_file(&shallow_lock); |
| oid_array_clear(&extra); |
| oid_array_clear(&ref); |
| alternate_shallow_file = NULL; |
| return; |
| } |
| |
| /* |
| * remote is also shallow, check what ref is safe to update |
| * without updating .git/shallow |
| */ |
| status = xcalloc(nr_sought, sizeof(*status)); |
| assign_shallow_commits_to_refs(si, NULL, status); |
| if (si->nr_ours || si->nr_theirs) { |
| for (i = 0; i < nr_sought; i++) |
| if (status[i]) |
| sought[i]->status = REF_STATUS_REJECT_SHALLOW; |
| } |
| free(status); |
| oid_array_clear(&ref); |
| } |
| |
| static int iterate_ref_map(void *cb_data, struct object_id *oid) |
| { |
| struct ref **rm = cb_data; |
| struct ref *ref = *rm; |
| |
| if (!ref) |
| return -1; /* end of the list */ |
| *rm = ref->next; |
| oidcpy(oid, &ref->old_oid); |
| return 0; |
| } |
| |
| struct ref *fetch_pack(struct fetch_pack_args *args, |
| int fd[], |
| const struct ref *ref, |
| struct ref **sought, int nr_sought, |
| struct oid_array *shallow, |
| char **pack_lockfile, |
| enum protocol_version version) |
| { |
| struct ref *ref_cpy; |
| struct shallow_info si; |
| struct oid_array shallows_scratch = OID_ARRAY_INIT; |
| |
| fetch_pack_setup(); |
| if (nr_sought) |
| nr_sought = remove_duplicates_in_refs(sought, nr_sought); |
| |
| if (args->no_dependents && !args->filter_options.choice) { |
| /* |
| * The protocol does not support requesting that only the |
| * wanted objects be sent, so approximate this by setting a |
| * "blob:none" filter if no filter is already set. This works |
| * for all object types: note that wanted blobs will still be |
| * sent because they are directly specified as a "want". |
| * |
| * NEEDSWORK: Add an option in the protocol to request that |
| * only the wanted objects be sent, and implement it. |
| */ |
| parse_list_objects_filter(&args->filter_options, "blob:none"); |
| } |
| |
| if (version != protocol_v2 && !ref) { |
| packet_flush(fd[1]); |
| die(_("no matching remote head")); |
| } |
| if (version == protocol_v2) { |
| if (shallow->nr) |
| BUG("Protocol V2 does not provide shallows at this point in the fetch"); |
| memset(&si, 0, sizeof(si)); |
| ref_cpy = do_fetch_pack_v2(args, fd, ref, sought, nr_sought, |
| &shallows_scratch, &si, |
| pack_lockfile); |
| } else { |
| prepare_shallow_info(&si, shallow); |
| ref_cpy = do_fetch_pack(args, fd, ref, sought, nr_sought, |
| &si, pack_lockfile); |
| } |
| reprepare_packed_git(the_repository); |
| |
| if (!args->cloning && args->deepen) { |
| struct check_connected_options opt = CHECK_CONNECTED_INIT; |
| struct ref *iterator = ref_cpy; |
| opt.shallow_file = alternate_shallow_file; |
| if (args->deepen) |
| opt.is_deepening_fetch = 1; |
| if (check_connected(iterate_ref_map, &iterator, &opt)) { |
| error(_("remote did not send all necessary objects")); |
| free_refs(ref_cpy); |
| ref_cpy = NULL; |
| rollback_lock_file(&shallow_lock); |
| goto cleanup; |
| } |
| args->connectivity_checked = 1; |
| } |
| |
| update_shallow(args, sought, nr_sought, &si); |
| cleanup: |
| clear_shallow_info(&si); |
| oid_array_clear(&shallows_scratch); |
| 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; |
| } |