GIT-VERSION-FILE: check ./version first.

[thirdparty/git.git] / builtin-symbolic-ref.c

diff --git a/builtin-symbolic-ref.c b/builtin-symbolic-ref.c
index b4ec6f28ed8903ec160ce0747fd1916f69bbacdc..d41b40640b96e7d5568174c7d16088c29d361d42 100644 (file)
--- a/builtin-symbolic-ref.c
+++ b/builtin-symbolic-ref.c
@@ -1,32 +1,68 @@
 #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);