minecraft/vanilla/install_script.sh

#!/bin/bash
# Copyright (c) 2022 fithwum
# All rights reserved

MC_DIR=/MCserver
EULA_FILE=$MC_DIR/eula.txt
EULA_MARKER=$MC_DIR/.eula_accepted

VERSION_CHECK=$(curl -s "https://piston-meta.mojang.com/mc/game/version_manifest_v2.json" | grep -Pom 1 '"url": "\K[^"]*'$MC_VERSION'.json')
MC_SERVER_FILE=$(curl -s $VERSION_CHECK | jq --raw-output '.downloads.server.url')
MC_RUN_FILE=https://gitea.fithwum.tech/fithwum/minecraft/raw/branch/master/vanilla/run.sh

# Install java
if dpkg -s openjdk-$JAVA_VERSION-jre-headless &> /dev/null
	then
		echo "INFO ! openjdk-$JAVA_VERSION-jre-headless installed ... moving on."
	else
		echo " "
		echo "WARNING ! openjdk-$JAVA_VERSION-jre-headless not installed ... will install now."
		apt-get update
		apt-get --no-install-recommends -y install openjdk-$JAVA_VERSION-jre-headless
fi

# if dpkg -s msopenjdk-$JAVA_VERSION &> /dev/null
# 	then
# 		echo "INFO ! msopenjdk-$JAVA_VERSION installed ... moving on."
# 	else
# 		echo " "
# 		echo "WARNING ! msopenjdk-$JAVA_VERSION not installed ... will install now."
# 		wget https://packages.microsoft.com/config/debian/$(lsb_release -rs)/packages-microsoft-prod.deb -O packages-microsoft-prod.deb \
# 		dpkg -i packages-microsoft-prod.deb \
# 		apt-get update && apt-get install -y msopenjdk-25 \
# 		apt-get -y update && apt-get -y --fix-broken install
# fi

# Main install (Debian).
# Check for server files and download if needed.
if [ -e $MC_DIR/MCserver-$MC_VERSION.jar ]
	then
		echo " "
		echo "INFO ! MCserver-$MC_VERSION.jar found starting now."
	else
		echo " "
		echo "WARNING ! MCserver-$MC_VERSION.jar is out of date/missing ... will download now."
		echo " "
		echo "INFO ! Cleaning old files."
		mkdir -p $MC_DIR/old-server-versions/
		mv $MC_DIR/MCserver-*.jar $MC_DIR/old-server-versions/
		wget --no-cache --show-progress --progress=bar:force:noscroll $MC_SERVER_FILE -O $MC_DIR/MCserver-$MC_VERSION.jar
		chmod +x $MC_DIR/MCserver-$MC_VERSION.jar
fi

# Looking for run-${MC_VERSION}.sh
if [ -e $MC_DIR/run-$MC_VERSION.sh ]
	then
		echo " "
		echo "INFO ! run-$MC_VERSION.sh found ... will use existing file."
	else
		echo " "
		echo "WARNING ! run.sh is out of date/missing ... will download now."
		mv $MC_DIR/run-*.sh $MC_DIR/old-server-versions/
		wget --no-cache --show-progress --progress=bar:force:noscroll $MC_RUN_FILE -O $MC_DIR/run-$MC_VERSION.sh
		chmod +x $MC_DIR/run-$MC_VERSION.sh
fi

echo "INFO ! Setting game port."
if [ -f $MC_DIR/server.properties ]; then
	sed -i '/server-port='*'/c\server-port='$GAME_PORT'' $MC_DIR/server.properties
fi

# Wait briefly for installer/server to generate eula.txt
if [ ! -f "$EULA_FILE" ] && [ ! -f "$EULA_MARKER" ]; then
    echo "INFO ! Waiting for EULA generation..."
    sleep 5
fi

# If EULA already accepted once, never touch it again
if [ -f "$EULA_MARKER" ]; then
    echo "INFO ! EULA previously accepted"
    return 0 2>/dev/null || true
fi

# First-time decision
if [ "$ACCEPT_EULA" = "true" ]; then
    echo "INFO ! Accepting EULA (one-time)"
    sed -i 's/eula=false/eula=true/' "$EULA_FILE" 2>/dev/null \
    || echo "eula=true" > "$EULA_FILE"
    touch "$EULA_MARKER"
elif [ "$ACCEPT_EULA" = "false" ]; then
    echo "WARNING ! EULA not accepted on first run"
    echo "WARNING ! Set ACCEPT_EULA=true to proceed"
    sleep infinity
else
    echo "ERROR ! ACCEPT_EULA must be set to true or false on first run"
    sleep infinity
fi

# Set permissions.
chown 99:100 -R $MC_DIR
chmod 777 -R $MC_DIR

sleep 1

# Run Minecraft server.
echo " "
echo "INFO ! Starting Minecraft Server $MC_VERSION"
exec $MC_DIR/run-$MC_VERSION.sh --dataPath=$MC_DIR

exit