| #include "builtin.h" |
| #include "config.h" |
| #include "commit.h" |
| #include "refs.h" |
| #include "pkt-line.h" |
| #include "sideband.h" |
| #include "run-command.h" |
| #include "remote.h" |
| #include "connect.h" |
| #include "send-pack.h" |
| #include "quote.h" |
| #include "transport.h" |
| #include "version.h" |
| #include "sha1-array.h" |
| #include "gpg-interface.h" |
| #include "cache.h" |
| |
| int option_parse_push_signed(const struct option *opt, |
| const char *arg, int unset) |
| { |
| if (unset) { |
| *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER; |
| return 0; |
| } |
| switch (git_parse_maybe_bool(arg)) { |
| case 1: |
| *(int *)(opt->value) = SEND_PACK_PUSH_CERT_ALWAYS; |
| return 0; |
| case 0: |
| *(int *)(opt->value) = SEND_PACK_PUSH_CERT_NEVER; |
| return 0; |
| } |
| if (!strcasecmp("if-asked", arg)) { |
| *(int *)(opt->value) = SEND_PACK_PUSH_CERT_IF_ASKED; |
| return 0; |
| } |
| die("bad %s argument: %s", opt->long_name, arg); |
| } |
| |
| static void feed_object(const unsigned char *sha1, FILE *fh, int negative) |
| { |
| if (negative && !has_sha1_file(sha1)) |
| return; |
| |
| if (negative) |
| putc('^', fh); |
| fputs(sha1_to_hex(sha1), fh); |
| putc('\n', fh); |
| } |
| |
| /* |
| * Make a pack stream and spit it out into file descriptor fd |
| */ |
| static int pack_objects(int fd, struct ref *refs, struct oid_array *extra, struct send_pack_args *args) |
| { |
| /* |
| * The child becomes pack-objects --revs; we feed |
| * the revision parameters to it via its stdin and |
| * let its stdout go back to the other end. |
| */ |
| struct child_process po = CHILD_PROCESS_INIT; |
| FILE *po_in; |
| int i; |
| int rc; |
| |
| argv_array_push(&po.args, "pack-objects"); |
| argv_array_push(&po.args, "--all-progress-implied"); |
| argv_array_push(&po.args, "--revs"); |
| argv_array_push(&po.args, "--stdout"); |
| if (args->use_thin_pack) |
| argv_array_push(&po.args, "--thin"); |
| if (args->use_ofs_delta) |
| argv_array_push(&po.args, "--delta-base-offset"); |
| if (args->quiet || !args->progress) |
| argv_array_push(&po.args, "-q"); |
| if (args->progress) |
| argv_array_push(&po.args, "--progress"); |
| if (is_repository_shallow()) |
| argv_array_push(&po.args, "--shallow"); |
| po.in = -1; |
| po.out = args->stateless_rpc ? -1 : fd; |
| po.git_cmd = 1; |
| if (start_command(&po)) |
| die_errno("git pack-objects failed"); |
| |
| /* |
| * We feed the pack-objects we just spawned with revision |
| * parameters by writing to the pipe. |
| */ |
| po_in = xfdopen(po.in, "w"); |
| for (i = 0; i < extra->nr; i++) |
| feed_object(extra->oid[i].hash, po_in, 1); |
| |
| while (refs) { |
| if (!is_null_oid(&refs->old_oid)) |
| feed_object(refs->old_oid.hash, po_in, 1); |
| if (!is_null_oid(&refs->new_oid)) |
| feed_object(refs->new_oid.hash, po_in, 0); |
| refs = refs->next; |
| } |
| |
| fflush(po_in); |
| if (ferror(po_in)) |
| die_errno("error writing to pack-objects"); |
| fclose(po_in); |
| |
| if (args->stateless_rpc) { |
| char *buf = xmalloc(LARGE_PACKET_MAX); |
| while (1) { |
| ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX); |
| if (n <= 0) |
| break; |
| send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX); |
| } |
| free(buf); |
| close(po.out); |
| po.out = -1; |
| } |
| |
| rc = finish_command(&po); |
| if (rc) { |
| /* |
| * For a normal non-zero exit, we assume pack-objects wrote |
| * something useful to stderr. For death by signal, though, |
| * we should mention it to the user. The exception is SIGPIPE |
| * (141), because that's a normal occurrence if the remote end |
| * hangs up (and we'll report that by trying to read the unpack |
| * status). |
| */ |
| if (rc > 128 && rc != 141) |
| error("pack-objects died of signal %d", rc - 128); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int receive_unpack_status(int in) |
| { |
| const char *line = packet_read_line(in, NULL); |
| if (!line) |
| return error(_("unexpected flush packet while reading remote unpack status")); |
| if (!skip_prefix(line, "unpack ", &line)) |
| return error(_("unable to parse remote unpack status: %s"), line); |
| if (strcmp(line, "ok")) |
| return error(_("remote unpack failed: %s"), line); |
| return 0; |
| } |
| |
| static int receive_status(int in, struct ref *refs) |
| { |
| struct ref *hint; |
| int ret; |
| |
| hint = NULL; |
| ret = receive_unpack_status(in); |
| while (1) { |
| char *refname; |
| char *msg; |
| char *line = packet_read_line(in, NULL); |
| if (!line) |
| break; |
| if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) { |
| error("invalid ref status from remote: %s", line); |
| ret = -1; |
| break; |
| } |
| |
| refname = line + 3; |
| msg = strchr(refname, ' '); |
| if (msg) |
| *msg++ = '\0'; |
| |
| /* first try searching at our hint, falling back to all refs */ |
| if (hint) |
| hint = find_ref_by_name(hint, refname); |
| if (!hint) |
| hint = find_ref_by_name(refs, refname); |
| if (!hint) { |
| warning("remote reported status on unknown ref: %s", |
| refname); |
| continue; |
| } |
| if (hint->status != REF_STATUS_EXPECTING_REPORT) { |
| warning("remote reported status on unexpected ref: %s", |
| refname); |
| continue; |
| } |
| |
| if (line[0] == 'o' && line[1] == 'k') |
| hint->status = REF_STATUS_OK; |
| else { |
| hint->status = REF_STATUS_REMOTE_REJECT; |
| ret = -1; |
| } |
| hint->remote_status = xstrdup_or_null(msg); |
| /* start our next search from the next ref */ |
| hint = hint->next; |
| } |
| return ret; |
| } |
| |
| static int sideband_demux(int in, int out, void *data) |
| { |
| int *fd = data, ret; |
| #ifdef NO_PTHREADS |
| close(fd[1]); |
| #endif |
| ret = recv_sideband("send-pack", fd[0], out); |
| close(out); |
| return ret; |
| } |
| |
| static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb) |
| { |
| struct strbuf *sb = cb; |
| if (graft->nr_parent == -1) |
| packet_buf_write(sb, "shallow %s\n", oid_to_hex(&graft->oid)); |
| return 0; |
| } |
| |
| static void advertise_shallow_grafts_buf(struct strbuf *sb) |
| { |
| if (!is_repository_shallow()) |
| return; |
| for_each_commit_graft(advertise_shallow_grafts_cb, sb); |
| } |
| |
| #define CHECK_REF_NO_PUSH -1 |
| #define CHECK_REF_STATUS_REJECTED -2 |
| #define CHECK_REF_UPTODATE -3 |
| static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args) |
| { |
| if (!ref->peer_ref && !args->send_mirror) |
| return CHECK_REF_NO_PUSH; |
| |
| /* Check for statuses set by set_ref_status_for_push() */ |
| switch (ref->status) { |
| case REF_STATUS_REJECT_NONFASTFORWARD: |
| case REF_STATUS_REJECT_ALREADY_EXISTS: |
| case REF_STATUS_REJECT_FETCH_FIRST: |
| case REF_STATUS_REJECT_NEEDS_FORCE: |
| case REF_STATUS_REJECT_STALE: |
| case REF_STATUS_REJECT_NODELETE: |
| return CHECK_REF_STATUS_REJECTED; |
| case REF_STATUS_UPTODATE: |
| return CHECK_REF_UPTODATE; |
| default: |
| return 0; |
| } |
| } |
| |
| /* |
| * the beginning of the next line, or the end of buffer. |
| * |
| * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and |
| * convert many similar uses found by "git grep -A4 memchr". |
| */ |
| static const char *next_line(const char *line, size_t len) |
| { |
| const char *nl = memchr(line, '\n', len); |
| if (!nl) |
| return line + len; /* incomplete line */ |
| return nl + 1; |
| } |
| |
| static int generate_push_cert(struct strbuf *req_buf, |
| const struct ref *remote_refs, |
| struct send_pack_args *args, |
| const char *cap_string, |
| const char *push_cert_nonce) |
| { |
| const struct ref *ref; |
| struct string_list_item *item; |
| char *signing_key = xstrdup(get_signing_key()); |
| const char *cp, *np; |
| struct strbuf cert = STRBUF_INIT; |
| int update_seen = 0; |
| |
| strbuf_addstr(&cert, "certificate version 0.1\n"); |
| strbuf_addf(&cert, "pusher %s ", signing_key); |
| datestamp(&cert); |
| strbuf_addch(&cert, '\n'); |
| if (args->url && *args->url) { |
| char *anon_url = transport_anonymize_url(args->url); |
| strbuf_addf(&cert, "pushee %s\n", anon_url); |
| free(anon_url); |
| } |
| if (push_cert_nonce[0]) |
| strbuf_addf(&cert, "nonce %s\n", push_cert_nonce); |
| if (args->push_options) |
| for_each_string_list_item(item, args->push_options) |
| strbuf_addf(&cert, "push-option %s\n", item->string); |
| strbuf_addstr(&cert, "\n"); |
| |
| for (ref = remote_refs; ref; ref = ref->next) { |
| if (check_to_send_update(ref, args) < 0) |
| continue; |
| update_seen = 1; |
| strbuf_addf(&cert, "%s %s %s\n", |
| oid_to_hex(&ref->old_oid), |
| oid_to_hex(&ref->new_oid), |
| ref->name); |
| } |
| if (!update_seen) |
| goto free_return; |
| |
| if (sign_buffer(&cert, &cert, signing_key)) |
| die(_("failed to sign the push certificate")); |
| |
| packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string); |
| for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) { |
| np = next_line(cp, cert.buf + cert.len - cp); |
| packet_buf_write(req_buf, |
| "%.*s", (int)(np - cp), cp); |
| } |
| packet_buf_write(req_buf, "push-cert-end\n"); |
| |
| free_return: |
| free(signing_key); |
| strbuf_release(&cert); |
| return update_seen; |
| } |
| |
| |
| static int atomic_push_failure(struct send_pack_args *args, |
| struct ref *remote_refs, |
| struct ref *failing_ref) |
| { |
| struct ref *ref; |
| /* Mark other refs as failed */ |
| for (ref = remote_refs; ref; ref = ref->next) { |
| if (!ref->peer_ref && !args->send_mirror) |
| continue; |
| |
| switch (ref->status) { |
| case REF_STATUS_EXPECTING_REPORT: |
| ref->status = REF_STATUS_ATOMIC_PUSH_FAILED; |
| continue; |
| default: |
| break; /* do nothing */ |
| } |
| } |
| return error("atomic push failed for ref %s. status: %d\n", |
| failing_ref->name, failing_ref->status); |
| } |
| |
| #define NONCE_LEN_LIMIT 256 |
| |
| static void reject_invalid_nonce(const char *nonce, int len) |
| { |
| int i = 0; |
| |
| if (NONCE_LEN_LIMIT <= len) |
| die("the receiving end asked to sign an invalid nonce <%.*s>", |
| len, nonce); |
| |
| for (i = 0; i < len; i++) { |
| int ch = nonce[i] & 0xFF; |
| if (isalnum(ch) || |
| ch == '-' || ch == '.' || |
| ch == '/' || ch == '+' || |
| ch == '=' || ch == '_') |
| continue; |
| die("the receiving end asked to sign an invalid nonce <%.*s>", |
| len, nonce); |
| } |
| } |
| |
| int send_pack(struct send_pack_args *args, |
| int fd[], struct child_process *conn, |
| struct ref *remote_refs, |
| struct oid_array *extra_have) |
| { |
| int in = fd[0]; |
| int out = fd[1]; |
| struct strbuf req_buf = STRBUF_INIT; |
| struct strbuf cap_buf = STRBUF_INIT; |
| struct ref *ref; |
| int need_pack_data = 0; |
| int allow_deleting_refs = 0; |
| int status_report = 0; |
| int use_sideband = 0; |
| int quiet_supported = 0; |
| int agent_supported = 0; |
| int use_atomic = 0; |
| int atomic_supported = 0; |
| int use_push_options = 0; |
| int push_options_supported = 0; |
| unsigned cmds_sent = 0; |
| int ret; |
| struct async demux; |
| const char *push_cert_nonce = NULL; |
| |
| /* Does the other end support the reporting? */ |
| if (server_supports("report-status")) |
| status_report = 1; |
| if (server_supports("delete-refs")) |
| allow_deleting_refs = 1; |
| if (server_supports("ofs-delta")) |
| args->use_ofs_delta = 1; |
| if (server_supports("side-band-64k")) |
| use_sideband = 1; |
| if (server_supports("quiet")) |
| quiet_supported = 1; |
| if (server_supports("agent")) |
| agent_supported = 1; |
| if (server_supports("no-thin")) |
| args->use_thin_pack = 0; |
| if (server_supports("atomic")) |
| atomic_supported = 1; |
| if (server_supports("push-options")) |
| push_options_supported = 1; |
| |
| if (args->push_cert != SEND_PACK_PUSH_CERT_NEVER) { |
| int len; |
| push_cert_nonce = server_feature_value("push-cert", &len); |
| if (push_cert_nonce) { |
| reject_invalid_nonce(push_cert_nonce, len); |
| push_cert_nonce = xmemdupz(push_cert_nonce, len); |
| } else if (args->push_cert == SEND_PACK_PUSH_CERT_ALWAYS) { |
| die(_("the receiving end does not support --signed push")); |
| } else if (args->push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) { |
| warning(_("not sending a push certificate since the" |
| " receiving end does not support --signed" |
| " push")); |
| } |
| } |
| |
| if (!remote_refs) { |
| fprintf(stderr, "No refs in common and none specified; doing nothing.\n" |
| "Perhaps you should specify a branch such as 'master'.\n"); |
| return 0; |
| } |
| if (args->atomic && !atomic_supported) |
| die(_("the receiving end does not support --atomic push")); |
| |
| use_atomic = atomic_supported && args->atomic; |
| |
| if (args->push_options && !push_options_supported) |
| die(_("the receiving end does not support push options")); |
| |
| use_push_options = push_options_supported && args->push_options; |
| |
| if (status_report) |
| strbuf_addstr(&cap_buf, " report-status"); |
| if (use_sideband) |
| strbuf_addstr(&cap_buf, " side-band-64k"); |
| if (quiet_supported && (args->quiet || !args->progress)) |
| strbuf_addstr(&cap_buf, " quiet"); |
| if (use_atomic) |
| strbuf_addstr(&cap_buf, " atomic"); |
| if (use_push_options) |
| strbuf_addstr(&cap_buf, " push-options"); |
| if (agent_supported) |
| strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized()); |
| |
| /* |
| * NEEDSWORK: why does delete-refs have to be so specific to |
| * send-pack machinery that set_ref_status_for_push() cannot |
| * set this bit for us??? |
| */ |
| for (ref = remote_refs; ref; ref = ref->next) |
| if (ref->deletion && !allow_deleting_refs) |
| ref->status = REF_STATUS_REJECT_NODELETE; |
| |
| if (!args->dry_run) |
| advertise_shallow_grafts_buf(&req_buf); |
| |
| if (!args->dry_run && push_cert_nonce) |
| cmds_sent = generate_push_cert(&req_buf, remote_refs, args, |
| cap_buf.buf, push_cert_nonce); |
| |
| /* |
| * Clear the status for each ref and see if we need to send |
| * the pack data. |
| */ |
| for (ref = remote_refs; ref; ref = ref->next) { |
| switch (check_to_send_update(ref, args)) { |
| case 0: /* no error */ |
| break; |
| case CHECK_REF_STATUS_REJECTED: |
| /* |
| * When we know the server would reject a ref update if |
| * we were to send it and we're trying to send the refs |
| * atomically, abort the whole operation. |
| */ |
| if (use_atomic) { |
| strbuf_release(&req_buf); |
| strbuf_release(&cap_buf); |
| return atomic_push_failure(args, remote_refs, ref); |
| } |
| /* else fallthrough */ |
| default: |
| continue; |
| } |
| if (!ref->deletion) |
| need_pack_data = 1; |
| |
| if (args->dry_run || !status_report) |
| ref->status = REF_STATUS_OK; |
| else |
| ref->status = REF_STATUS_EXPECTING_REPORT; |
| } |
| |
| /* |
| * Finally, tell the other end! |
| */ |
| for (ref = remote_refs; ref; ref = ref->next) { |
| char *old_hex, *new_hex; |
| |
| if (args->dry_run || push_cert_nonce) |
| continue; |
| |
| if (check_to_send_update(ref, args) < 0) |
| continue; |
| |
| old_hex = oid_to_hex(&ref->old_oid); |
| new_hex = oid_to_hex(&ref->new_oid); |
| if (!cmds_sent) { |
| packet_buf_write(&req_buf, |
| "%s %s %s%c%s", |
| old_hex, new_hex, ref->name, 0, |
| cap_buf.buf); |
| cmds_sent = 1; |
| } else { |
| packet_buf_write(&req_buf, "%s %s %s", |
| old_hex, new_hex, ref->name); |
| } |
| } |
| |
| if (use_push_options) { |
| struct string_list_item *item; |
| |
| packet_buf_flush(&req_buf); |
| for_each_string_list_item(item, args->push_options) |
| packet_buf_write(&req_buf, "%s", item->string); |
| } |
| |
| if (args->stateless_rpc) { |
| if (!args->dry_run && (cmds_sent || is_repository_shallow())) { |
| packet_buf_flush(&req_buf); |
| send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX); |
| } |
| } else { |
| write_or_die(out, req_buf.buf, req_buf.len); |
| packet_flush(out); |
| } |
| strbuf_release(&req_buf); |
| strbuf_release(&cap_buf); |
| |
| if (use_sideband && cmds_sent) { |
| memset(&demux, 0, sizeof(demux)); |
| demux.proc = sideband_demux; |
| demux.data = fd; |
| demux.out = -1; |
| demux.isolate_sigpipe = 1; |
| if (start_async(&demux)) |
| die("send-pack: unable to fork off sideband demultiplexer"); |
| in = demux.out; |
| } |
| |
| if (need_pack_data && cmds_sent) { |
| if (pack_objects(out, remote_refs, extra_have, args) < 0) { |
| for (ref = remote_refs; ref; ref = ref->next) |
| ref->status = REF_STATUS_NONE; |
| if (args->stateless_rpc) |
| close(out); |
| if (git_connection_is_socket(conn)) |
| shutdown(fd[0], SHUT_WR); |
| |
| /* |
| * Do not even bother with the return value; we know we |
| * are failing, and just want the error() side effects. |
| */ |
| if (status_report) |
| receive_unpack_status(in); |
| |
| if (use_sideband) { |
| close(demux.out); |
| finish_async(&demux); |
| } |
| fd[1] = -1; |
| return -1; |
| } |
| if (!args->stateless_rpc) |
| /* Closed by pack_objects() via start_command() */ |
| fd[1] = -1; |
| } |
| if (args->stateless_rpc && cmds_sent) |
| packet_flush(out); |
| |
| if (status_report && cmds_sent) |
| ret = receive_status(in, remote_refs); |
| else |
| ret = 0; |
| if (args->stateless_rpc) |
| packet_flush(out); |
| |
| if (use_sideband && cmds_sent) { |
| close(demux.out); |
| if (finish_async(&demux)) { |
| error("error in sideband demultiplexer"); |
| ret = -1; |
| } |
| } |
| |
| if (ret < 0) |
| return ret; |
| |
| if (args->porcelain) |
| return 0; |
| |
| for (ref = remote_refs; ref; ref = ref->next) { |
| switch (ref->status) { |
| case REF_STATUS_NONE: |
| case REF_STATUS_UPTODATE: |
| case REF_STATUS_OK: |
| break; |
| default: |
| return -1; |
| } |
| } |
| return 0; |
| } |