new: [up] force ``-d`` option.

This will be required to allow special post-up scripts.

bin/compose

@@ -652,9 +652,7 @@ array_pop() {
 export -f array_pop
 
 array_member() {
-    local src elt
-    src="$1"
-    elt="$2"
+    local src="$1" elt="$2"
     while read-0 key; do
         if [ "$(eval "echo -n \"\${$src[\$key]}\"")" == "$elt" ]; then
             return 0
@@ -2487,6 +2485,10 @@ export SERVICE_PACK="$services"
 case "$action" in
     up|start|stop|build)
         master_services=$(get_master_services $SERVICE_PACK) || exit 1
+        if [[ "$action" == "up" ]] && ! array_member action_opts -d; then  ## force daemon mode for up
+            action_opts=("-d" "${action_opts[@]}")
+        fi
+
         launch_docker_compose "${compose_opts[@]}" "$action" "${action_opts[@]}" $master_services
         ;;
     run)