move file check to sh file

debian/rules

@@ -11,10 +11,7 @@ override_dh_install:
 	dh_systemd_enable gitlab.target
 	dh_systemd_start gitlab.target
 	# Make sure we are installing all required files in debian/install
-	a=$(ls -1 | wc -l); b=$(cat debian/install |cut -d' '\
-	-f1|grep -v debian |wc -l); if ! [ $(echo "$a" - "$b"|bc) -eq 5 ];\
-	then echo "Install newly added files or adjust the count in\
-	debian/rules"; exit 1;fi
+	sh debian/upstream-file-count-check.sh
 
 override_dh_installinit:
 	dh_installinit --no-start

debian/upstream-file-count-check.sh

@@ -0,0 +1,9 @@
+ucount=$(ls -1 | wc -l)
+dcount=$(cat debian/install |cut -d' ' -f1|grep -v debian |wc -l)
+ignored=5
+if ! [ $(echo "$ucount" - "$dcount"|bc) -eq $ignored ]; then
+  echo "Found new files added by upstream and not added to debian/install"
+  echo "Add them to debian/install or adjust 'ignored=5'"
+  echo "in debian/upstream-file-count-check.sh as required"
+  exit 1
+fi