avoid regenerating existing ssh key

diff --git a/modules/default.mk b/modules/default.mk
index a0e88a2e1b52b99f352edbe3a59048e22d2e206c..6b1f08e13d293e93c490db8337ce348ca8b86968 100644 (file)
--- a/modules/default.mk
+++ b/modules/default.mk
@@ -83,7 +83,7 @@ _rootpass: ${CFGROOT}
        chroot "$${CFGROOT}" usermod -p "$$(openssl passwd "$${rootpass}")" root
 
 ${rootkey}.pub:
-       ssh-keygen -N '' -f "$${rootkey}"
+       [ -f "$@" ] || ssh-keygen -N '' -f "$${rootkey}"
 
 _rootkey: ${CFGROOT} ${rootkey}.pub
        mkdir -m 700 "$${CFGROOT}/root/.ssh/"