start-spigot.sh

#!/usr/bin/env bash
set -euo pipefail

mkdir -p "build" "bin"

if [[ ! $(find bin/ -name "spigot*.jar" -mtime -7) ]]; then
    (echo "Spigot is older than a week"
    cd "build" &&
    curl -o "BuildTools.jar" -z "BuildTools.jar" "https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar" &&
    java -jar "BuildTools.jar" &&
    spigotBuild=$(basename spigot*.jar) &&
    spigotName="${spigotBuild%.*}-$(date -Iseconds).jar" &&
    cp "$spigotBuild" "../bin/$spigotName" &&
    ln -sf "bin/$spigotName" "../spigot.jar") || echo "Failed to build spigot.jar, running server with the old one."
fi

java -server -XX:+DisableExplicitGC -jar "spigot.jar"