+#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 show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--deref] [--tags] [--heads] [--] [pattern*]";
+static const char * const show_ref_usage[] = {
+ "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<n>]] [--abbrev[=<n>]] [--tags] [--heads] [--] [pattern*] ",
+ "git show-ref --exclude-existing[=pattern] < ref-list",
+ NULL
+};
-static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0, found_match = 0, verify = 0, quiet = 0;
+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 int show_ref(const char *refname, const unsigned char *sha1)
+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)
{
struct object *obj;
+ const char *hex;
+ unsigned char peeled[20];
if (tags_only || heads_only) {
int match;
- match = heads_only && !strncmp(refname, "refs/heads/", 11);
- match |= tags_only && !strncmp(refname, "refs/tags/", 10);
+ match = heads_only && !prefixcmp(refname, "refs/heads/");
+ match |= tags_only && !prefixcmp(refname, "refs/tags/");
if (!match)
return 0;
}
match:
found_match++;
- obj = parse_object(sha1);
- if (!obj) {
- if (quiet)
- return 0;
- die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1));
- }
+
+ /* 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;
- printf("%s %s\n", sha1_to_hex(sha1), refname);
- if (deref_tags && obj->type == OBJ_TAG) {
- obj = deref_tag(obj, refname, 0);
- printf("%s %s^{}\n", sha1_to_hex(obj->sha1), refname);
+
+ show_one(refname, sha1);
+
+ if (!deref_tags)
+ return 0;
+
+ if ((flag & REF_ISPACKED) && !peel_ref(refname, peeled)) {
+ if (!is_null_sha1(peeled)) {
+ hex = find_unique_abbrev(peeled, abbrev);
+ printf("%s %s^{}\n", hex, refname);
+ }
+ }
+ else {
+ obj = parse_object(sha1);
+ if (!obj)
+ die("git show-ref: bad ref %s (%s)", refname,
+ sha1_to_hex(sha1));
+ if (obj->type == OBJ_TAG) {
+ obj = deref_tag(obj, refname, 0);
+ if (!obj)
+ die("git show-ref: bad tag at ref %s (%s)", refname,
+ sha1_to_hex(sha1));
+ hex = find_unique_abbrev(obj->sha1, abbrev);
+ printf("%s %s^{}\n", hex, refname);
+ }
}
return 0;
}
-int cmd_show_ref(int argc, const char **argv, const char *prefix)
+static int add_existing(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
{
- int i;
+ struct string_list *list = (struct string_list *)cbdata;
+ string_list_insert(refname, list);
+ return 0;
+}
- for (i = 1; i < argc; i++) {
- const char *arg = argv[i];
- if (*arg != '-') {
- pattern = argv + i;
- break;
- }
- if (!strcmp(arg, "--")) {
- pattern = argv + i + 1;
- if (!*pattern)
- pattern = NULL;
- break;
- }
- if (!strcmp(arg, "-q") || !strcmp(arg, "--quiet")) {
- quiet = 1;
- continue;
- }
- if (!strcmp(arg, "-h") || !strcmp(arg, "--head")) {
- show_head = 1;
- continue;
+/*
+ * 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 = { NULL, 0, 0, 0 };
+ 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';
}
- if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
- deref_tags = 1;
- continue;
+ 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 (!strcmp(arg, "--verify")) {
- verify = 1;
+ if (check_ref_format(ref)) {
+ warning("ref '%s' ignored", ref);
continue;
}
- if (!strcmp(arg, "--tags")) {
- tags_only = 1;
- continue;
+ if (!string_list_has_string(&existing_refs, ref)) {
+ printf("%s\n", buf);
}
- if (!strcmp(arg, "--heads")) {
- heads_only = 1;
- continue;
+ }
+ 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_BOOLEAN(0, "tags", &tags_only, "only show tags (can be combined with heads)"),
+ OPT_BOOLEAN(0, "heads", &heads_only, "only show heads (can be combined with tags)"),
+ OPT_BOOLEAN(0, "verify", &verify, "stricter reference checking, "
+ "requires exact ref path"),
+ OPT_BOOLEAN('h', "head", &show_head, "show the HEAD reference"),
+ OPT_BOOLEAN('d', "dereference", &deref_tags,
+ "dereference tags into object IDs"),
+ { OPTION_CALLBACK, 's', "hash", &abbrev, "n",
+ "only show SHA1 hash using <n> digits",
+ PARSE_OPT_OPTARG, &hash_callback },
+ OPT__ABBREV(&abbrev),
+ OPT__QUIET(&quiet),
+ { OPTION_CALLBACK, 0, "exclude-existing", &exclude_existing_arg,
+ "pattern", "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, "show usage",
+ PARSE_OPT_HIDDEN | PARSE_OPT_NOARG, help_callback },
+ OPT_END()
+};
+
+int cmd_show_ref(int argc, const char **argv, const char *prefix)
+{
+ 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 (!prefixcmp(*pattern, "refs/") &&
+ resolve_ref(*pattern, sha1, 1, NULL)) {
+ if (!quiet)
+ show_one(*pattern, sha1);
+ }
+ else if (!quiet)
+ die("'%s' - not a valid ref", *pattern);
+ else
+ return 1;
+ pattern++;
}
- usage(show_ref_usage);
+ return 0;
}
+
if (show_head)
- head_ref(show_ref);
- for_each_ref(show_ref);
+ head_ref(show_ref, NULL);
+ for_each_ref(show_ref, NULL);
if (!found_match) {
if (verify && !quiet)
die("No match");