#include "builtin.h"
#include "cache.h"
+#include "refs.h"
static const char git_symbolic_ref_usage[] =
-"git-symbolic-ref name [ref]";
+"git-symbolic-ref [-q] [-m <reason>] name [ref]";
-static void check_symref(const char *HEAD)
+static void check_symref(const char *HEAD, int quiet)
{
unsigned char sha1[20];
- const char *git_HEAD = strdup(git_path("%s", HEAD));
- const char *git_refs_heads_master = resolve_ref(git_HEAD, sha1, 0);
- if (git_refs_heads_master) {
- /* we want to strip the .git/ part */
- int pfxlen = strlen(git_HEAD) - strlen(HEAD);
- puts(git_refs_heads_master + pfxlen);
- }
- else
+ int flag;
+ const char *refs_heads_master = resolve_ref(HEAD, sha1, 0, &flag);
+
+ if (!refs_heads_master)
die("No such ref: %s", HEAD);
+ else if (!(flag & REF_ISSYMREF)) {
+ if (!quiet)
+ die("ref %s is not a symbolic ref", HEAD);
+ else
+ exit(1);
+ }
+ puts(refs_heads_master);
}
int cmd_symbolic_ref(int argc, const char **argv, const char *prefix)
{
+ int quiet = 0;
+ const char *msg = NULL;
+
git_config(git_default_config);
+
+ while (1 < argc) {
+ const char *arg = argv[1];
+ if (arg[0] != '-')
+ break;
+ else if (!strcmp("-q", arg))
+ quiet = 1;
+ else if (!strcmp("-m", arg)) {
+ argc--;
+ argv++;
+ if (argc <= 1)
+ break;
+ msg = argv[1];
+ if (!*msg)
+ die("Refusing to perform update with empty message");
+ if (strchr(msg, '\n'))
+ die("Refusing to perform update with \\n in message");
+ }
+ else if (!strcmp("--", arg)) {
+ argc--;
+ argv++;
+ break;
+ }
+ else
+ die("unknown option %s", arg);
+ argc--;
+ argv++;
+ }
+
switch (argc) {
case 2:
- check_symref(argv[1]);
+ check_symref(argv[1], quiet);
break;
case 3:
- create_symref(strdup(git_path("%s", argv[1])), argv[2]);
+ create_symref(argv[1], argv[2], msg);
break;
default:
usage(git_symbolic_ref_usage);