Load per-stack commands from abra-commands.sh..

.. and add a new `abra run_args` command to allow adding arguments to
`docker exec`.

abra

@@ -16,6 +16,10 @@ if type direnv > /dev/null 2>&1 && ! direnv status | grep -q 'Found RC allowed t
 	exit
 fi
 
+if [ -f abra-commands.sh ]; then
+	. abra-commands.sh
+fi
+
 sub_help() {
 	echo "Usage: $PROGRAM_NAME [-a STACK_NAME] <subcommand> [options]"
 	echo ""
@@ -24,8 +28,9 @@ sub_help(){
 	echo "    secret_generate SECRET VERSION [CMD]  generate a secret, store it in pass & as a Docker secret"
 	echo "    deploy [COMPOSE_FILE]                 let 'em rip"
 	echo "    logs SERVICE                          tail logs from a deployed service"
+	echo "    ... (custom commands)"
 	echo ""
-		echo "Make sure \$STACK_NAME is set (probably using direnv)"
+	echo "Make sure \$STACK_NAME is set using direnv or -a"
 }
 
 sub_secret_generate(){
@@ -43,9 +48,11 @@ sub_secret_generate(){
 		>(pass insert "hosts/autonomic-swarm/${STACK_NAME}/${SECRET}" -m)
 }
 
-sub_run(){
+sub_run_args(){
 	SERVICE=$1
-	SH=${2:-/bin/sh}
+	ARGS=$2
+
+	shift 2
 
 	if [ -z "$SERVICE" ]; then
 		echo "Usage: $PROGRAM_NAME run SERVICE [CMD]"
@@ -60,11 +67,19 @@ sub_run(){
 		exit
 	fi
 
-	docker exec -it "$CONTAINER" "$SH"
+	docker exec $ARGS -it "$CONTAINER" $@
 
 	return
 }
 
+sub_run(){
+	SERVICE=$1
+
+	shift
+
+	sub_run_args "$SERVICE" "" "$@"
+}
+
 sub_deploy (){
 	COMPOSE=${1:-compose.yml}