/* * Builtin "git tag" * * Copyright (c) 2007 Kristian Høgsberg , * Carlos Rica * 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" #include "diff.h" #include "revision.h" static const char * const git_tag_usage[] = { "git tag [-a|-s|-u ] [-f] [-m |-F ] []", "git tag -d ...", "git tag -l [-n[]] []", "git tag -v ...", NULL }; static char signingkey[1000]; static int core_clock_skew = 86400; struct tag_filter { const char *pattern; int lines; struct commit_list *with_commit; }; #define PGP_SIGNATURE "-----BEGIN PGP SIGNATURE-----" static int in_commit_list(const struct commit_list *want, struct commit *c) { for (; want; want = want->next) if (!hashcmp(want->item->object.sha1, c->object.sha1)) return 1; return 0; } static int contains_recurse(struct commit *candidate, const struct commit_list *want, unsigned long cutoff) { struct commit_list *p; /* was it previously marked as containing a want commit? */ if (candidate->object.flags & TMP_MARK) return 1; /* or marked as not possibly containing a want commit? */ if (candidate->object.flags & UNINTERESTING) return 0; /* or are we it? */ if (in_commit_list(want, candidate)) return 1; if (parse_commit(candidate) < 0) return 0; /* stop searching if we go too far back in time */ if (candidate->date < cutoff) return 0; /* Otherwise recurse and mark ourselves for future traversals. */ for (p = candidate->parents; p; p = p->next) { if (contains_recurse(p->item, want, cutoff)) { candidate->object.flags |= TMP_MARK; return 1; } } candidate->object.flags |= UNINTERESTING; return 0; } static int contains(struct commit *candidate, const struct commit_list *want) { unsigned long cutoff = 0; if (core_clock_skew >= 0) { const struct commit_list *c; unsigned long min_date = ULONG_MAX; for (c = want; c; c = c->next) { if (parse_commit(c->item) < 0) continue; if (c->item->date < min_date) min_date = c->item->date; } if (min_date > core_clock_skew) cutoff = min_date - core_clock_skew; } return contains_recurse(candidate, want, cutoff); } 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->with_commit) { struct commit *commit; commit = lookup_commit_reference_gently(sha1, 1); if (!commit) return 0; if (!contains(commit, filter->with_commit)) return 0; } 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 commit_list *with_commit) { struct tag_filter filter; if (pattern == NULL) pattern = "*"; filter.pattern = pattern; filter.lines = lines; filter.with_commit = with_commit; 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, 0)) return 1; printf("Deleted tag '%s' (was %s)\n", name, find_unique_abbrev(sha1, DEFAULT_ABBREV)); return 0; } static int verify_tag(const char *name, const char *ref, const unsigned char *sha1) { const char *argv_verify_tag[] = {"verify-tag", "-v", "SHA1_HEX", NULL}; argv_verify_tag[2] = sha1_to_hex(sha1); if (run_command_v_opt(argv_verify_tag, RUN_GIT_CMD)) 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; int i, j; 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); close(gpg.out); finish_command(&gpg); return error("gpg did not accept the tag data"); } close(gpg.in); len = strbuf_read(buffer, gpg.out, 1024); close(gpg.out); if (finish_command(&gpg) || !len || len < 0) return error("gpg failed to sign the tag"); /* Strip CR from the line endings, in case we are on Windows. */ for (i = j = 0; i < buffer->len; i++) if (buffer->buf[i] != '\r') { if (i != j) buffer->buf[j] = buffer->buf[i]; j++; } strbuf_setlen(buffer, j); 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, void *cb) { if (!strcmp(var, "user.signingkey")) { if (!value) return config_error_nonbool(var); set_signingkey(value); return 0; } if (!strcmp(var, "core.clockskew")) { if (!value || !strcmp(value, "none")) core_clock_skew = -1; else core_clock_skew = git_config_int(var, value); return 0; } return git_default_config(var, value, cb); } 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 int build_tag_object(struct strbuf *buf, int sign, unsigned char *result) { if (sign && do_sign(buf) < 0) return error("unable to sign the tag"); if (write_sha1_file(buf->buf, buf->len, tag_type, result) < 0) return error("unable to write tag file"); return 0; } 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; char *path = NULL; 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) { int fd; /* write the template message before editing: */ path = git_pathdup("TAG_EDITMSG"); fd = open(path, O_CREAT | O_TRUNC | O_WRONLY, 0600); if (fd < 0) die_errno("could not create file '%s'", path); if (!is_null_sha1(prev)) write_tag_body(fd, prev); else write_or_die(fd, tag_template, strlen(tag_template)); close(fd); if (launch_editor(path, buf, NULL)) { fprintf(stderr, "Please supply the message using either -m or -F option.\n"); exit(1); } } stripspace(buf, 1); if (!message && !buf->len) die("no tag message?"); strbuf_insert(buf, 0, header_buf, header_len); if (build_tag_object(buf, sign, result) < 0) { if (path) fprintf(stderr, "The tag message has been left in %s\n", path); exit(128); } if (path) { unlink_or_warn(path); free(path); } } 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 = STRBUF_INIT; 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 = -1, list = 0, delete = 0, verify = 0; const char *msgfile = NULL, *keyid = NULL; struct msg_arg msg = { 0, STRBUF_INIT }; struct commit_list *with_commit = NULL; struct option options[] = { OPT_BOOLEAN('l', NULL, &list, "list tag names"), { OPTION_INTEGER, 'n', NULL, &lines, "n", "print 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_FILENAME('F', NULL, &msgfile, "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', "force", &force, "replace the tag if exists"), OPT_GROUP("Tag listing options"), { OPTION_CALLBACK, 0, "contains", &with_commit, "commit", "print only tags that contain the commit", PARSE_OPT_LASTARG_DEFAULT, parse_opt_with_commit, (intptr_t)"HEAD", }, OPT_END() }; git_config(git_tag_config, NULL); argc = parse_options(argc, argv, prefix, options, git_tag_usage, 0); if (keyid) { sign = 1; set_signingkey(keyid); } if (sign) annotate = 1; if (argc == 0 && !(delete || verify)) list = 1; if ((annotate || msg.given || msgfile || force) && (list || delete || verify)) usage_with_options(git_tag_usage, options); if (list + delete + verify > 1) usage_with_options(git_tag_usage, options); if (list) return list_tags(argv[0], lines == -1 ? 0 : lines, with_commit); if (lines != -1) die("-n option is only allowed with -l."); if (with_commit) die("--contains option is only allowed with -l."); if (delete) return for_each_tag_name(argv, delete_tag); if (verify) return for_each_tag_name(argv, verify_tag); 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_errno("cannot read '%s'", msgfile); } else { if (strbuf_read_file(&buf, msgfile, 1024) < 0) die_errno("could not open or read '%s'", msgfile); } } } 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); if (force && hashcmp(prev, object)) printf("Updated tag '%s' (was %s)\n", tag, find_unique_abbrev(prev, DEFAULT_ABBREV)); strbuf_release(&buf); return 0; }