ServerMaker.sh

#!/bin/bash
#title      :ServerMaker.sh
#description    :Creates and starts a server for any CurseForge modpack
#author     :Stapleton
#date       :20190127
#version    :0.5
#usage      :./ServerMaker.sh <CurseForgeLink>
#notes      :Needs Java 8 JRE to install and run the server
#=======================================================
packlink=$1
cmpdlpackversion=${2:-latest}
log=ServerMaker.log
forgeprop=server.properties
cmpdl="cmpdl-1.2.jar"

if [ -f ./$log  ]; then
    rm $log
fi

div======================================================

cmpdllink=https://github.com/Vazkii/CMPDL/releases/download/1.2/cmpdl-1.2.jar

xms=1G
xmx=6G
jar_args=nogui
java_args="-server -d64 -Xms$xms -Xmx$xmx -XX:+UseG1GC -Dsun.rmi.dgc.server.gcInterval=2147483646 -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M -Dfml.readTimeout=180"

/usr/bin/clear

_GetCMPDL() {
    wget -q $cmpdllink &&
    chmod +x ./$cmpdl
}

_InstallModpack() {
    /usr/bin/java -jar $cmpdl $packlink $cmpdlpackversion | tee -a $log | grep -e "Downloading [A-Za-z]" -e "Downloaded!"

    packdir=$(grep -e "Output Dir is " ./$log)
    packdir=${packdir#"Output Dir is "}

    mv "$packdir"/minecraft/* .
    mv "$packdir"/instance.cfg ./.instance.cfg
    rm -rf "$packdir"
}

_GetVars() {
    forgeversion=$(grep notes ./.instance.cfg | cut -d= -f2 | cut -d" " -f9)
    forgeversion=${forgeversion%"."}
    packversion=$(grep name ./.instance.cfg | cut -d= -f2)
    packversion=${packversion##*\ }
    mcversion=$(grep IntendedVersion ./.instance.cfg | cut -d= -f2)

    forgelink=https://files.minecraftforge.net/maven/net/minecraftforge/forge/$mcversion-$forgeversion/forge-$mcversion-$forgeversion-installer.jar
    forgeinstaller="forge-$mcversion-$forgeversion-installer.jar"
    forge="forge-$mcversion-$forgeversion-universal.jar"
}

_BannerInstall() {
    echo $div
    echo "Installing Modpack Server"
    echo "Minecraft $mcversion"
    echo "Modpack Version: $packversion"
    echo "Using Forge: $forgeversion"
    echo $div
    echo ""
}

_BannerStart() {
    echo $div
    echo "Starting Modpack Server"
    echo "Minecraft $mcversion"
    echo "Modpack Version: $packversion"
    echo "Using Forge: $forgeversion"
    echo $div
    echo ""
}

_GetForge() {
    wget -q $forgelink &&
    chmod +x ./$forgeinstaller
}

_InstallForge() {
    /usr/bin/java -jar $forgeinstaller --installServer
}

_Setup() {
    echo "eula=true" >> eula.txt
    echo "allow-flight=true" >> $forgeprop
    echo "server-ip=0.0.0.0" >> $forgeprop
}

_Cleanup() {
    rm -rf $forgeinstaller $forgeinstaller.log $cmpdl
}

_StartServer() {
    /usr/bin/java $java_args -jar $forge $jar_args
}

Install() {
    echo $div
    echo "Downloading CMPDL from Github"
    echo $div
    _GetCMPDL >> $log &&
    /usr/bin/clear

    echo $div
    echo "Downloading Modpack from Curseforge via CMPDL"
    echo $div
    _InstallModpack &&
    /usr/bin/clear

    _GetVars &&

    _BannerInstall &&
    /usr/bin/clear

    echo $div
    echo "Downloading Forge $forgeversion"
    echo $div
    _GetForge >> $log &&
    /usr/bin/clear

    echo $div
    echo "Installing Forge $forgeversion Server"
    echo $div
    _InstallForge >> $log &&
    /usr/bin/clear

    echo $div
    echo "Setting up Modpack Server"
    echo $div
    _Setup &&
    /usr/bin/clear

    echo $div
    echo "Cleaning up installation files"
    echo $div
    _Cleanup &&
    /usr/bin/clear

    echo $div
    echo "Successfully installed Modpack Server"
    echo "Minecraft $mcversion"
    echo "Modpack Version: $packversion"
    echo "Using Forge: $forgeversion"
    echo $div
    echo ""
}

Start() {
    _GetVars &&
    _BannerStart &&
    _StartServer
}

if [ ! -f ./minecraft*.jar ]; then
    if [ "$packlink" == '' ]; then
        echo "No CurseForge Modpack link was supplied!"
        exit
    fi
    Install
else
    Start
fi