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->hash)) != 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 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()); 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 wants */ add_wants(wants, &req_buf); /* 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; }
static int send_fetch_request(struct fetch_negotiator *negotiator, 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(the_repository) || 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(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); write_or_die(fd_out, req_buf.buf, req_buf.len); strbuf_release(&req_buf); return ret; }
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; struct fetch_negotiator negotiator; fetch_negotiator_init(&negotiator, negotiation_algorithm); 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 (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: /* Check for shallow-info section */ if (process_section_header(&reader, "shallow-info", 1)) receive_shallow_info(args, &reader); 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)) die(_("git fetch-pack: fetch failed.")); state = FETCH_DONE; break; case FETCH_DONE: continue; } } negotiator.release(&negotiator); oidset_clear(&common); return ref; }