I LOVE THIS REPL#!/bin/bash

set -e
root=$PWD
mkdir -p mc
cd mc

download() {
set -e
echo By executing this script you agree to the JRE License, the PaperMC license,
echo the Mojang Minecraft EULA,
echo the NPM license, the MIT license,
echo and the licenses of all packages used \in this project.
echo Press Ctrl+C \if you \do not agree to any of these licenses.
echo Press Enter to agree.
read -s agree_text
echo Thank you \for agreeing, the download will now begin.
wget -O jre.tar.gz "https://javadl.oracle.com/webapps/download/AutoDL?BundleId=242050_3d5a2bb8f8d4428bbe94aed7ec7ae784"
tar -zxf jre.tar.gz
rm -rf jre.tar.gz
mv ./jre* ./jre
echo JRE downloaded
wget -O server.jar "https://papermc.io/api/v1/paper/1.16.1/latest/download"
echo Paper downloaded
wget -O server.properties "https://files.mikeylab.com/xpire/server.properties"
echo Server properties downloaded
echo "eula=true" > eula.txt
echo Agreed to Mojang EULA
wget -O ngrok.zip https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.zip
unzip ngrok.zip
rm -rf ngrok.zip
echo "Download complete"
}

require() {
if [ ! $1 $2 ]; then
echo $3
echo "Running download..."
download
fi
}
require_file() { require -f $1 "File $1 required but not found"; }
require_dir() { require -d $1 "Directory $1 required but not found"; }
require_env() {
var=python3 -c "import os;print(os.getenv('$1',''))"
if [ -z "${var}" ]; then
echo "Environment variable $1 not set. "
echo "In your .env file, add a line with:"
echo "$1="
echo "and then right after the = add $2"
exit
fi
eval "$1=$var"
}
require_executable() {
require_file "$1"
chmod +x "$1"
}

server files

require_file "eula.txt"
require_file "server.properties"
require_file "server.jar"

java

require_dir "jre"
require_executable "jre/bin/java"

ngrok binary

require_executable "ngrok"

environment variables

require_env "ngrok_token" "your ngrok authtoken from https://dashboard.ngrok.com"
require_env "ngrok_region" "your region, one of:
us - United States (Ohio)
eu - Europe (Frankfurt)
ap - Asia/Pacific (Singapore)
au - Australia (Sydney)
sa - South America (Sao Paulo)
jp - Japan (Tokyo)
in - India (Mumbai)"

start web server

#echo "Starting web server..."
echo "Minecraft server starting, please wait" > $root/ip.txt

start tunnel

mkdir -p ./logs
touch ./logs/temp # avoid "no such file or directory"
rm ./logs/*
echo "Starting ngrok tunnel in region $ngrok_region"
./ngrok authtoken $ngrok_token
touch logs/ngrok.log
./ngrok tcp -region $ngrok_region --log=stdout 1025 > ./logs/ngrok.log &

wait for started tunnel message, and print each line of file as it is written

tail -f ./logs/ngrok.log | sed '/started tunnel/ q'
orig_server_ip=curl --silent http://127.0.0.1:4040/api/tunnels | jq '.tunnels[0].public_url'
trimmed_server_ip=echo $orig_server_ip | grep -o '[a-zA-Z0-9.]*\.ngrok.io[0-9:]*'
server_ip="${trimmed_server_ip:-$orig_server_ip}"
echo "Server IP is: $server_ip"
echo "Server running on: $server_ip" > $root/ip.txt

touch logs/latest.log

Experiment: Run http server after all ports are opened

#( tail -f ./logs/latest.log | sed '/RCON running on/ q' && python3 -m http.server 8080 ) &

Start minecraft

PATH=$PWD/jre/bin:$PATH
echo "Running server..."
java -Xmx1G -Xms1G -jar server.jar nogui
echo "Exit code $?"