Kill livereload servers on Gulp run

watch.js

/** 
	Credit to https://danisadesigner.com/blog/killing-livereload-server/ for the initial command (and a handy bash script)
*/

const gulp = require('gulp');
const exec = require('child_process').exec;
const livereload = require('gulp-livereload');

// YOUR INCLUDES HERE!

module.exports = function () {
    // Kill any running liverload server... sorry if you got more than one running :-P
    exec(
		'LRPID=$(/usr/sbin/lsof -n -i4TCP:35729 | grep LISTEN | awk \'{print $2}\'); echo $LRPID; if [ $LRPID ]; then kill -9 $LRPID; fi',
		function( err, stdout, stderr ) { /* jshint ignore:line */
			if ( stdout ) {
				console.log("Starting Listener");
			}
			if ( stderr ) {
				console.error( stderr );
			}
			livereload.listen();
		
			// Dummy... change this.
			// gulp.watch(..., [...]);
		}
	);
};