go-run.sh

#!/bin/bash

function showHelp() {
        echo "Available options :"
        echo "-f | --file               Go file to run"
        echo "-p | --port               Port to kill"
        echo "-o | --output             Output file for logging"
        echo "-h | --help               Show help"
}

while [[ "$1" =~ ^- && ! "$1" == "--" ]]; do case $1 in
        -f | --file )
                shift; file=$1
                ;;
        -p | --port )
                shift; port=$1
                ;;
        -o | --output )
                shift; output=$1
                ;;
        -h | --help )
                showHelp
                exit
                ;;
        * )
                echo "Invalid option $1"
                showHelp
                exit 1
                ;;
esac; shift; done
if [[ "$1" == '--' ]]; then shift; fi

if [[ -z $file ]]; then
        echo "File can't be empty!"
        showHelp
        exit
fi

if [[ ! -f $file ]]; then
        echo "$file doesn't exist"
        exit
fi

if [[ -z $port ]]; then
        echo "Port can't be empty!"
        showHelp
        exit
fi

if [[ -z $output ]]; then
        output=output.log
fi

PID="$(sudo lsof -i :$port | awk '{print $2}' | tail -n 1)"
kill "$PID"
./$file | awk -v time="$(TZ='Asia/Jakarta' date +"[%d-%m-%Y %H:%M:%S]")" '{ print time, $0; fflush(); }' >> "$(dirname $0)/$output" &