Teach update-ref about a symbolic ref stored in a textfile.

[git.git] / update-ref.c

diff --git a/update-ref.c b/update-ref.c
index 1863b82..6919cea 100644 (file)
--- a/update-ref.c
+++ b/update-ref.c
@@ -13,6 +13,7 @@ static const char *resolve_ref(const char *path, unsigned char *sha1)
 
        for (;;) {
                struct stat st;
+               char *buf;
                int fd;
 
                if (--depth < 0)
@@ -44,7 +45,19 @@ static const char *resolve_ref(const char *path, unsigned char *sha1)
                        return NULL;
                len = read(fd, buffer, sizeof(buffer)-1);
                close(fd);
-               break;
+
+               /*
+                * Is it a symbolic ref?
+                */
+               if (len < 4 || memcmp("ref:", buffer, 4))
+                       break;
+               buf = buffer + 4;
+               len -= 4;
+               while (len && isspace(*buf))
+                       buf++, len--;
+               while (len && isspace(buf[len-1]))
+                       buf[--len] = 0;
+               path = git_path("%.*s", len, buf);
        }
        if (len < 40 || get_sha1_hex(buffer, sha1))
                return NULL;