add secrets for username and password

sendxmpp.sh

@@ -1,11 +1,14 @@
 #!/bin/sh
 
-: ${PLUGIN_USERNAME?"missing username"}
-: ${PLUGIN_JSERVER?"missing jserver"}
-: ${PLUGIN_PASSWORD?"missing password"}
-: ${PLUGIN_RECIPIENT?"missing recipient"}
+# set username from secret if not supplied
+[ -z $PLUGIN_USERNAME ] && [ -n $SENDXMPP_USERNAME ] && PLUGIN_USERNAME="${SENDXMPP_USERNAME}"
+[ -z $PLUGIN_PASSWORD ] && [ -n $SENDXMPP_PASSWORD ] && PLUGIN_PASSWORD="${SENDXMPP_PASSWORD}"
 
-env | grep DRONE
+# check if all required fields are set
+[ -z "$PLUGIN_USERNAME" ] && echo "missing username or sendxmpp_username secret" && exit 1
+[ -z "$PLUGIN_PASSWORD" ] && echo "missing password or sendxmpp_password secret" && exit 1
+[ -z "$PLUGIN_JSERVER" ] && echo "missing jserver" && exit 1
+[ -z "$PLUGIN_RECIPIENT" ] && echo "missing recipient" && exit 1
 
 MSG="drone ist da"