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builtin-annotate.c
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/* * Builtin "git tag" * * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>, * Carlos Rica <jasampler@gmail.com> * Based on git-tag.sh and mktag.c by Linus Torvalds. */ #include "cache.h" #include "builtin.h" #include "refs.h" #include "tag.h" #include "run-command.h" #include "parse-options.h" static const char * const git_tag_usage[] = { "git-tag [-a|-s|-u <key-id>] [-f] [-m <msg>|-F <file>] <tagname> [<head>]", "git-tag -d <tagname>...", "git-tag -l [-n[<num>]] [<pattern>]", "git-tag -v <tagname>...", NULL }; static char signingkey[1000]; void launch_editor(const char *path, struct strbuf *buffer, const char *const *env) { const char *editor, *terminal; editor = getenv("GIT_EDITOR"); if (!editor && editor_program) editor = editor_program; if (!editor) editor = getenv("VISUAL"); if (!editor) editor = getenv("EDITOR"); terminal = getenv("TERM"); if (!editor && (!terminal || !strcmp(terminal, "dumb"))) { fprintf(stderr, "Terminal is dumb but no VISUAL nor EDITOR defined.\n" "Please supply the message using either -m or -F option.\n"); exit(1); } if (!editor) editor = "vi"; if (strcmp(editor, ":")) { size_t len = strlen(editor); int i = 0; const char *args[6]; struct strbuf arg0; strbuf_init(&arg0, 0); if (strcspn(editor, "$ \t'") != len) { /* there are specials */ strbuf_addf(&arg0, "%s \"$@\"", editor); args[i++] = "sh"; args[i++] = "-c"; args[i++] = arg0.buf; } args[i++] = editor; args[i++] = path; args[i] = NULL; if (run_command_v_opt_cd_env(args, 0, NULL, env)) die("There was a problem with the editor %s.", editor); strbuf_release(&arg0); } if (!buffer) return; if (strbuf_read_file(buffer, path, 0) < 0) die("could not read message file '%s': %s", path, strerror(errno)); } struct tag_filter { const char *pattern; int lines; }; #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" static int show_reference(const char *refname, const unsigned char *sha1, int flag, void *cb_data) { struct tag_filter *filter = cb_data; if (!fnmatch(filter->pattern, refname, 0)) { int i; unsigned long size; enum object_type type; char *buf, *sp, *eol; size_t len; if (!filter->lines) { printf("%s\n", refname); return 0; } printf("%-15s ", refname); buf = read_sha1_file(sha1, &type, &size); if (!buf || !size) return 0; /* skip header */ sp = strstr(buf, "\n\n"); if (!sp) { free(buf); return 0; } /* only take up to "lines" lines, and strip the signature */ for (i = 0, sp += 2; i < filter->lines && sp < buf + size && prefixcmp(sp, PGP_SIGNATURE "\n"); i++) { if (i) printf("\n "); eol = memchr(sp, '\n', size - (sp - buf)); len = eol ? eol - sp : size - (sp - buf); fwrite(sp, len, 1, stdout); if (!eol) break; sp = eol + 1; } putchar('\n'); free(buf); } return 0; } static int list_tags(const char *pattern, int lines) { struct tag_filter filter; if (pattern == NULL) pattern = "*"; filter.pattern = pattern; filter.lines = lines; for_each_tag_ref(show_reference, (void *) &filter); return 0; } typedef int (*each_tag_name_fn)(const char *name, const char *ref, const unsigned char *sha1); static int for_each_tag_name(const char **argv, each_tag_name_fn fn) { const char **p; char ref[PATH_MAX]; int had_error = 0; unsigned char sha1[20]; for (p = argv; *p; p++) { if (snprintf(ref, sizeof(ref), "refs/tags/%s", *p) >= sizeof(ref)) { error("tag name too long: %.*s...", 50, *p); had_error = 1; continue; } if (!resolve_ref(ref, sha1, 1, NULL)) { error("tag '%s' not found.", *p); had_error = 1; continue; } if (fn(*p, ref, sha1)) had_error = 1; } return had_error; } static int delete_tag(const char *name, const char *ref, const unsigned char *sha1) { if (delete_ref(ref, sha1)) return 1; printf("Deleted tag '%s'\n", name); return 0; } static int verify_tag(const char *name, const char *ref, const unsigned char *sha1) { const char *argv_verify_tag[] = {"git-verify-tag", "-v", "SHA1_HEX", NULL}; argv_verify_tag[2] = sha1_to_hex(sha1); if (run_command_v_opt(argv_verify_tag, 0)) return error("could not verify the tag '%s'", name); return 0; } static int do_sign(struct strbuf *buffer) { struct child_process gpg; const char *args[4]; char *bracket; int len; if (!*signingkey) { if (strlcpy(signingkey, git_committer_info(IDENT_ERROR_ON_NO_NAME), sizeof(signingkey)) > sizeof(signingkey) - 1) return error("committer info too long."); bracket = strchr(signingkey, '>'); if (bracket) bracket[1] = '\0'; } /* When the username signingkey is bad, program could be terminated * because gpg exits without reading and then write gets SIGPIPE. */ signal(SIGPIPE, SIG_IGN); memset(&gpg, 0, sizeof(gpg)); gpg.argv = args; gpg.in = -1; gpg.out = -1; args[0] = "gpg"; args[1] = "-bsau"; args[2] = signingkey; args[3] = NULL; if (start_command(&gpg)) return error("could not run gpg."); if (write_in_full(gpg.in, buffer->buf, buffer->len) != buffer->len) { close(gpg.in); finish_command(&gpg); return error("gpg did not accept the tag data"); } close(gpg.in); gpg.close_in = 0; len = strbuf_read(buffer, gpg.out, 1024); if (finish_command(&gpg) || !len || len < 0) return error("gpg failed to sign the tag"); if (len < 0) return error("could not read the entire signature from gpg."); return 0; } static const char tag_template[] = "\n" "#\n" "# Write a tag message\n" "#\n"; static void set_signingkey(const char *value) { if (strlcpy(signingkey, value, sizeof(signingkey)) >= sizeof(signingkey)) die("signing key value too long (%.10s...)", value); } static int git_tag_config(const char *var, const char *value) { if (!strcmp(var, "user.signingkey")) { if (!value) return config_error_nonbool(value); set_signingkey(value); return 0; } return git_default_config(var, value); } static void write_tag_body(int fd, const unsigned char *sha1) { unsigned long size; enum object_type type; char *buf, *sp, *eob; size_t len; buf = read_sha1_file(sha1, &type, &size); if (!buf) return; /* skip header */ sp = strstr(buf, "\n\n"); if (!sp || !size || type != OBJ_TAG) { free(buf); return; } sp += 2; /* skip the 2 LFs */ eob = strstr(sp, "\n" PGP_SIGNATURE "\n"); if (eob) len = eob - sp; else len = buf + size - sp; write_or_die(fd, sp, len); free(buf); } static void create_tag(const unsigned char *object, const char *tag, struct strbuf *buf, int message, int sign, unsigned char *prev, unsigned char *result) { enum object_type type; char header_buf[1024]; int header_len; type = sha1_object_info(object, NULL); if (type <= OBJ_NONE) die("bad object type."); header_len = snprintf(header_buf, sizeof(header_buf), "object %s\n" "type %s\n" "tag %s\n" "tagger %s\n\n", sha1_to_hex(object), typename(type), tag, git_committer_info(IDENT_ERROR_ON_NO_NAME)); if (header_len > sizeof(header_buf) - 1) die("tag header too big."); if (!message) { char *path; int fd; /* write the template message before editing: */ path = xstrdup(git_path("TAG_EDITMSG")); fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600); if (fd < 0) die("could not create file '%s': %s", path, strerror(errno)); if (!is_null_sha1(prev)) write_tag_body(fd, prev); else write_or_die(fd, tag_template, strlen(tag_template)); close(fd); launch_editor(path, buf, NULL); unlink(path); free(path); } stripspace(buf, 1); if (!message && !buf->len) die("no tag message?"); strbuf_insert(buf, 0, header_buf, header_len); if (sign && do_sign(buf) < 0) die("unable to sign the tag"); if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0) die("unable to write tag file"); } struct msg_arg { int given; struct strbuf buf; }; static int parse_msg_arg(const struct option *opt, const char *arg, int unset) { struct msg_arg *msg = opt->value; if (!arg) return -1; if (msg->buf.len) strbuf_addstr(&(msg->buf), "\n\n"); strbuf_addstr(&(msg->buf), arg); msg->given = 1; return 0; } int cmd_tag(int argc, const char **argv, const char *prefix) { struct strbuf buf; unsigned char object[20], prev[20]; char ref[PATH_MAX]; const char *object_ref, *tag; struct ref_lock *lock; int annotate = 0, sign = 0, force = 0, lines = 0, list = 0, delete = 0, verify = 0; char *msgfile = NULL, *keyid = NULL; struct msg_arg msg = { 0, STRBUF_INIT }; struct option options[] = { OPT_BOOLEAN('l', NULL, &list, "list tag names"), { OPTION_INTEGER, 'n', NULL, &lines, NULL, "print n lines of each tag message", PARSE_OPT_OPTARG, NULL, 1 }, OPT_BOOLEAN('d', NULL, &delete, "delete tags"), OPT_BOOLEAN('v', NULL, &verify, "verify tags"), OPT_GROUP("Tag creation options"), OPT_BOOLEAN('a', NULL, &annotate, "annotated tag, needs a message"), OPT_CALLBACK('m', NULL, &msg, "msg", "message for the tag", parse_msg_arg), OPT_STRING('F', NULL, &msgfile, "file", "message in a file"), OPT_BOOLEAN('s', NULL, &sign, "annotated and GPG-signed tag"), OPT_STRING('u', NULL, &keyid, "key-id", "use another key to sign the tag"), OPT_BOOLEAN('f', NULL, &force, "replace the tag if exists"), OPT_END() }; git_config(git_tag_config); argc = parse_options(argc, argv, options, git_tag_usage, 0); if (keyid) { sign = 1; set_signingkey(keyid); } if (sign) annotate = 1; if (list) return list_tags(argv[0], lines); if (delete) return for_each_tag_name(argv, delete_tag); if (verify) return for_each_tag_name(argv, verify_tag); strbuf_init(&buf, 0); if (msg.given || msgfile) { if (msg.given && msgfile) die("only one -F or -m option is allowed."); annotate = 1; if (msg.given) strbuf_addbuf(&buf, &(msg.buf)); else { if (!strcmp(msgfile, "-")) { if (strbuf_read(&buf, 0, 1024) < 0) die("cannot read %s", msgfile); } else { if (strbuf_read_file(&buf, msgfile, 1024) < 0) die("could not open or read '%s': %s", msgfile, strerror(errno)); } } } if (argc == 0) { if (annotate) usage_with_options(git_tag_usage, options); return list_tags(NULL, lines); } tag = argv[0]; object_ref = argc == 2 ? argv[1] : "HEAD"; if (argc > 2) die("too many params"); if (get_sha1(object_ref, object)) die("Failed to resolve '%s' as a valid ref.", object_ref); if (snprintf(ref, sizeof(ref), "refs/tags/%s", tag) > sizeof(ref) - 1) die("tag name too long: %.*s...", 50, tag); if (check_ref_format(ref)) die("'%s' is not a valid tag name.", tag); if (!resolve_ref(ref, prev, 1, NULL)) hashclr(prev); else if (!force) die("tag '%s' already exists", tag); if (annotate) create_tag(object, tag, &buf, msg.given || msgfile, sign, prev, object); lock = lock_any_ref_for_update(ref, prev, 0); if (!lock) die("%s: cannot lock the ref", ref); if (write_ref_sha1(lock, object, NULL) < 0) die("%s: cannot update the ref", ref); strbuf_release(&buf); return 0; }
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