Add new @ shortcut for HEAD

diff --git a/sha1_name.c b/sha1_name.c
index f60c951234cd82355de0c38395985561c7f16c49..4428df19a7d3fff7c5d4a403f1677b694170129f 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -972,6 +972,17 @@ int get_sha1_mb(const char *name, unsigned char *sha1)
        return st;
 }
 
+/* parse @something syntax, when 'something' is not {.*} */
+static int interpret_empty_at(const char *name, int namelen, int len, struct strbuf *buf)
+{
+       if (len || name[1] == '{')
+               return -1;
+
+       strbuf_reset(buf);
+       strbuf_add(buf, "HEAD", 4);
+       return 1;
+}
+
 static int reinterpret(const char *name, int namelen, int len, struct strbuf *buf)
 {
        /* we have extra data, which might need further processing */
@@ -1032,9 +1043,15 @@ int interpret_branch_name(const char *name, struct strbuf *buf)
        cp = strchr(name, '@');
        if (!cp)
                return -1;
+
+       len = interpret_empty_at(name, namelen, cp - name, buf);
+       if (len > 0)
+               return reinterpret(name, namelen, len, buf);
+
        tmp_len = upstream_mark(cp, namelen - (cp - name));
        if (!tmp_len)
                return -1;
+
        len = cp + tmp_len - name;
        cp = xstrndup(name, cp - name);
        upstream = branch_get(*cp ? cp : NULL);