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-rw-r--r--builtin-show-ref.c147
1 files changed, 147 insertions, 0 deletions
diff --git a/builtin-show-ref.c b/builtin-show-ref.c
new file mode 100644
index 0000000..06ec400
--- /dev/null
+++ b/builtin-show-ref.c
@@ -0,0 +1,147 @@
+#include "cache.h"
+#include "refs.h"
+#include "object.h"
+#include "tag.h"
+
+static const char show_ref_usage[] = "git show-ref [-q|--quiet] [--verify] [-h|--head] [-d|--dereference] [-s|--hash[=<length>]] [--abbrev[=<length>]] [--tags] [--heads] [--] [pattern*]";
+
+static int deref_tags = 0, show_head = 0, tags_only = 0, heads_only = 0,
+ found_match = 0, verify = 0, quiet = 0, hash_only = 0, abbrev = 0;
+static const char **pattern;
+
+static int show_ref(const char *refname, const unsigned char *sha1, int flag, void *cbdata)
+{
+ struct object *obj;
+ const char *hex;
+
+ if (tags_only || heads_only) {
+ int match;
+
+ match = heads_only && !strncmp(refname, "refs/heads/", 11);
+ match |= tags_only && !strncmp(refname, "refs/tags/", 10);
+ 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++;
+ obj = parse_object(sha1);
+ if (!obj) {
+ if (quiet)
+ return 0;
+ die("git-show-ref: bad ref %s (%s)", refname, sha1_to_hex(sha1));
+ }
+ if (quiet)
+ return 0;
+
+ hex = find_unique_abbrev(sha1, abbrev);
+ if (hash_only)
+ printf("%s\n", hex);
+ else
+ printf("%s %s\n", hex, refname);
+ if (deref_tags && obj->type == OBJ_TAG) {
+ obj = deref_tag(obj, refname, 0);
+ 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)
+{
+ int i;
+
+ 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;
+ }
+ if (!strcmp(arg, "-d") || !strcmp(arg, "--dereference")) {
+ deref_tags = 1;
+ continue;
+ }
+ if (!strcmp(arg, "-s") || !strcmp(arg, "--hash")) {
+ hash_only = 1;
+ continue;
+ }
+ if (!strncmp(arg, "--hash=", 7) ||
+ (!strncmp(arg, "--abbrev", 8) &&
+ (arg[8] == '=' || arg[8] == '\0'))) {
+ if (arg[3] != 'h' && !arg[8])
+ /* --abbrev only */
+ abbrev = DEFAULT_ABBREV;
+ else {
+ /* --hash= or --abbrev= */
+ char *end;
+ if (arg[3] == 'h') {
+ hash_only = 1;
+ arg += 7;
+ }
+ else
+ arg += 9;
+ abbrev = strtoul(arg, &end, 10);
+ if (*end || abbrev > 40)
+ usage(show_ref_usage);
+ if (abbrev < MINIMUM_ABBREV)
+ abbrev = MINIMUM_ABBREV;
+ }
+ continue;
+ }
+ if (!strcmp(arg, "--verify")) {
+ verify = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--tags")) {
+ tags_only = 1;
+ continue;
+ }
+ if (!strcmp(arg, "--heads")) {
+ heads_only = 1;
+ continue;
+ }
+ usage(show_ref_usage);
+ }
+ 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;
+}