add script to switch to empty workspace

roles/i3/files/scripts/empty_ws.sh

@@ -0,0 +1,27 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+
+wss=`i3-msg -t get_workspaces | tr , '\n' | grep num | cut -d : -f 2 | sort -n`
+nextwss=()
+for ws in $wss; do
+	((ws=$ws+1))
+	nextwss+=( "$ws" )
+done
+
+for nextws in ${nextwss[@]}; do
+	exists=false
+	for ws in $wss; do
+		if [[ $ws -eq $nextws ]]; then
+			exists=true
+			break
+		fi
+	done
+
+	if [ $exists = false ]; then
+		newws=$nextws
+		break
+	fi
+done
+
+i3-msg workspace $newws