#include "builtin.h" #include "cache.h" #include "refs.h" #include "object.h" #include "tag.h" #include "string-list.h" #include "parse-options.h" static const char * const show_ref_usage[] = { N_("git show-ref [-q|--quiet] [--verify] [--head] [-d|--dereference] [-s|--hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [pattern*] "), N_("git show-ref --exclude-existing[=pattern] < ref-list"), NULL }; static int deref_tags, show_head, tags_only, heads_only, found_match, verify, quiet, hash_only, abbrev, exclude_arg; static const char **pattern; static const char *exclude_existing_arg; static void show_one(const char *refname, const unsigned char *sha1) { const char *hex = find_unique_abbrev(sha1, abbrev); if (hash_only) printf("%s\n", hex); else printf("%s %s\n", hex, refname); } static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata) { const char *hex; unsigned char peeled[20]; if (show_head && !strcmp(refname, "HEAD")) goto match; if (tags_only || heads_only) { int match; match = heads_only && starts_with(refname, "refs/heads/"); match |= tags_only && starts_with(refname, "refs/tags/"); if (!match) return 0; } if (pattern) { int reflen = strlen(refname); const char **p = pattern, *m; while ((m = *p++) != NULL) { int len = strlen(m); if (len > reflen) continue; if (memcmp(m, refname + reflen - len, len)) continue; if (len == reflen) goto match; /* "--verify" requires an exact match */ if (verify) continue; if (refname[reflen - len - 1] == '/') goto match; } return 0; } match: found_match++; /* This changes the semantics slightly that even under quiet we * detect and return error if the repository is corrupt and * ref points at a nonexistent object. */ if (!has_sha1_file(sha1)) die("git show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1)); if (quiet) return 0; show_one(refname, sha1); if (!deref_tags) return 0; if (!peel_ref(refname, peeled)) { hex = find_unique_abbrev(peeled, abbrev); printf("%s %s^{}\n", hex, refname); } return 0; } static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata) { struct string_list *list = (struct string_list *)cbdata; string_list_insert(list, refname); return 0; } /* * read "^(?:<anything>\s)?<refname>(?:\^\{\})?$" from the standard input, * and * (1) strip "^{}" at the end of line if any; * (2) ignore if match is provided and does not head-match refname; * (3) warn if refname is not a well-formed refname and skip; * (4) ignore if refname is a ref that exists in the local repository; * (5) otherwise output the line. */ static int exclude_existing(const char *match) { static struct string_list existing_refs = STRING_LIST_INIT_DUP; char buf[1024]; int matchlen = match ? strlen(match) : 0; for_each_ref(add_existing, &existing_refs); while (fgets(buf, sizeof(buf), stdin)) { char *ref; int len = strlen(buf); if (len > 0 && buf[len - 1] == '\n') buf[--len] = '\0'; if (3 <= len && !strcmp(buf + len - 3, "^{}")) { len -= 3; buf[len] = '\0'; } for (ref = buf + len; buf < ref; ref--) if (isspace(ref[-1])) break; if (match) { int reflen = buf + len - ref; if (reflen < matchlen) continue; if (strncmp(ref, match, matchlen)) continue; } if (check_refname_format(ref, 0)) { warning("ref '%s' ignored", ref); continue; } if (!string_list_has_string(&existing_refs, ref)) { printf("%s\n", buf); } } return 0; } static int hash_callback(const struct option *opt, const char *arg, int unset) { hash_only = 1; /* Use full length SHA1 if no argument */ if (!arg) return 0; return parse_opt_abbrev_cb(opt, arg, unset); } static int exclude_existing_callback(const struct option *opt, const char *arg, int unset) { exclude_arg = 1; *(const char **)opt->value = arg; return 0; } static int help_callback(const struct option *opt, const char *arg, int unset) { return -1; } static const struct option show_ref_options[] = { OPT_BOOL(0, "tags", &tags_only, N_("only show tags (can be combined with heads)")), OPT_BOOL(0, "heads", &heads_only, N_("only show heads (can be combined with tags)")), OPT_BOOL(0, "verify", &verify, N_("stricter reference checking, " "requires exact ref path")), OPT_HIDDEN_BOOL('h', NULL, &show_head, N_("show the HEAD reference, even if it would be filtered out")), OPT_BOOL(0, "head", &show_head, N_("show the HEAD reference, even if it would be filtered out")), OPT_BOOL('d', "dereference", &deref_tags, N_("dereference tags into object IDs")), { OPTION_CALLBACK, 's', "hash", &abbrev, N_("n"), N_("only show SHA1 hash using <n> digits"), PARSE_OPT_OPTARG, &hash_callback }, OPT__ABBREV(&abbrev), OPT__QUIET(&quiet, N_("do not print results to stdout (useful with --verify)")), { OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg, N_("pattern"), N_("show refs from stdin that aren't in local repository"), PARSE_OPT_OPTARG | PARSE_OPT_NONEG, exclude_existing_callback }, { OPTION_CALLBACK, 0, "help-all", NULL, NULL, N_("show usage"), PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback }, OPT_END() }; int cmd_show_ref(int argc, const char **argv, const char *prefix) { if (argc == 2 && !strcmp(argv[1], "-h")) usage_with_options(show_ref_usage, show_ref_options); argc = parse_options(argc, argv, prefix, show_ref_options, show_ref_usage, PARSE_OPT_NO_INTERNAL_HELP); if (exclude_arg) return exclude_existing(exclude_existing_arg); pattern = argv; if (!*pattern) pattern = NULL; if (verify) { if (!pattern) die("--verify requires a reference"); while (*pattern) { unsigned char sha1[20]; if (starts_with(*pattern, "refs/") && !read_ref(*pattern, sha1)) { if (!quiet) show_one(*pattern, sha1); } else if (!quiet) die("'%s' - not a valid ref", *pattern); else return 1; pattern++; } return 0; } if (show_head) head_ref(show_ref, NULL); for_each_ref(show_ref, NULL); if (!found_match) { if (verify && !quiet) die("No match"); return 1; } return 0; }