Display Forcing rebuild message only if ISO does not exist yet

diff --git a/grml-live b/grml-live
index 0a8fb3a..a32f9ad 100755 (executable)
--- a/grml-live
+++ b/grml-live
@@ -993,7 +993,7 @@ elif [ -n "$SKIP_MKISOFS" ] ; then
 else
    mkdir -p "$ISO_OUTPUT" || bailout 6 "Problem with creating $ISO_OUTPUT for stage 'iso build'"
 
-   if $FORCE_ISO_REBUILD ; then
+   if $FORCE_ISO_REBUILD && ! -f "${ISO_OUTPUT}/${ISO_NAME}"; then
       log   "Forcing rebuild of ISO because files on ISO have been modified."
       einfo "Forcing rebuild of ISO because files on ISO have been modified."
    fi