test-rebuild: set -e; require fresh arch dir

test-rebuild

@@ -1,5 +1,7 @@
 #!/bin/sh
 
+set -e
+
 PKG=$1
 
 [ -d "$PKG" -o -f "$PKG.spec" ] || fedpkg clone -a $PKG
@@ -11,13 +13,21 @@ if [ -n "$2" ]; then
 fi
 
 sudo yum-builddep $PKG.spec
+
+ARCH=$(arch)
+
+if [ -d $ARCH ]; then
+  echo Please remove $ARCH/
+  exit 1
+fi
+
 fedpkg local
 
 TMP=test-tmp
 
 mkdir -p $TMP/
 
-cd $(arch)
+cd $ARCH
 
 PKGS=$(rpm -qp *)