Re-enable running commands as another user

Fixes #14

abra

@@ -158,8 +158,7 @@ sub_help() {
 	echo "    deploy                                let 'em rip"
 	echo "    logs SERVICE [ARGS]                   tail logs from a deployed service"
 	echo "    multilogs                             tail logs from a whole stackk"
-	echo "    run SERVICE CMD                       run a command in the specified service's container"
-	echo "    run_args SERVICE ARGS CMD             run, passing extra args to docker exec"
+	echo "    run [-u USER] SERVICE CMD             run a command in the specified service's container"
 	echo "    secret [--help] [SUBCOMMAND]          manage secrets"
 	echo "    upgrade                               upgrade to the latest version"
 	echo "    ... (custom commands)"
@@ -217,16 +216,20 @@ sub_secret() {
 
 ###### Subcommand `run`
 
-sub_run_args(){
+sub_run(){
 	require_stack
 
-	SERVICE=$1
-	DOCKER_ARGS=$2
-
+	if [ "$1" == "-u" ]; then
+		RUN_USER="-u $2"
 		shift 2
+	fi
+
+	SERVICE=$1
+
+	shift
 
 	if [ -z "$SERVICE" ]; then
-		echo "Usage: $PROGRAM_NAME run SERVICE DOCKER_ARGS [CMD]"
+		echo "Usage: $PROGRAM_NAME run [-u USER] SERVICE [CMD]"
 		exit
 	fi
 
@@ -239,19 +242,11 @@ sub_run_args(){
 	fi
 
 	# shellcheck disable=SC2086
-	docker exec $DOCKER_ARGS -it "$CONTAINER" "$@"
+	docker exec $RUN_USER -it "$CONTAINER" "$@"
 
 	return
 }
 
-sub_run(){
-	SERVICE=$1
-
-	shift
-
-	sub_run_args "$SERVICE" "" "$@"
-}
-
 ###### Subcommand `deploy`
 
 sub_deploy (){