Put js update checker in separate script

Author: stefanv

Makefile

@@ -68,8 +68,5 @@ docker-images:
 
 # Call this target to see which Javascript dependencies are not up to date
 check-js-updates:
-	@if [[ ! -x ./node_modules/.bin/npm-check-updates ]]; then \
-		npm install npm-check-updates > /dev/null 2>&1; \
-	fi
-	@ncu
+	@./tools/check_js_updates.sh
 

tools/check_js_updates.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -e
+
+CHECKER=./node_modules/.bin/ncu
+
+if [[ ! -x ${CHECKER} ]]; then
+    npm install npm-check-updates > /dev/null 2>&1; \
+fi
+
+${CHECKER}
+