From 6b42fde02897248a10ac2629cbed8d7688ddac50 Mon Sep 17 00:00:00 2001
From: Jose Diaz-Gonzalez <email@josediazgonzalez.com>
Date: Mon, 13 May 2019 02:59:41 -0400
Subject: [PATCH] fix: handle case where modprobe does not exist

This is possible when installing dokku within a docker image.
---
 debian/postinst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/debian/postinst b/debian/postinst
index 789cbb50a..014926a76 100755
--- a/debian/postinst
+++ b/debian/postinst
@@ -33,7 +33,9 @@ case "$1" in
     configure)
     mandb
     [ ! -x /usr/bin/docker.io ] || ln -sf /usr/bin/docker.io /usr/local/bin/docker
-    modprobe aufs || echo "WARNING: Restart server to finish installing dokku!"
+    if [[ -f /sbin/modprobe ]]; then
+      modprobe aufs || echo "WARNING: Restart server to finish installing dokku!"
+    fi
     call-sshcommand create dokku /usr/bin/dokku
 
     egrep -i "^docker" /etc/group || groupadd docker