00-shell-script-for-minecraft-server.md

it was originally located this repository but removed due to clean up

gistfile1.txt

FROM mcr.microsoft.com/java/jre:17-zulu-alpine
ENV UID=1000
ENV GID=$UID

COPY ./startup.sh /startup.sh
RUN chmod +x /startup.sh
RUN apk add --no-cache bash curl jq

USER $UID
WORKDIR /data

ENTRYPOINT ["/startup.sh"]

startup.sh

#!/bin/bash

entrypoint=$ENTRYPOINT
project=${PROJECT:-paper}
version=$VERSION
build=$BUILD
sumbin=${SUMBIN:-sha256sum}

entrypoint_paper="https://papermc.io/api/v2"
entrypoint_purpur="https://api.purpurmc.org/v2"

case $PROJECT in

  # TODO: vanilla
  # TODO: various modloader (forge, fabric, etc...)
  # TODO: craftbukkit
  # TODO: spigot

  # from papermc.io
  paper | travertiane | waterfall | velocity)
    [[ -z $entrypoint ]] &&
      entrypoint=$entrypoint_paper

    # getting project data
    raw_project=$(curl -s "$entrypoint/projects/$project")
  
    [[ -z $version ]] &&
      version=$(jq -r '.versions[-1]' <<< $raw_project)

    # getting version data
      raw_version=$(curl -s "$entrypoint/projects/$project/versions/$version")

    [[ -z $build ]] &&
      build=$(jq -r '.builds[-1]' <<< $raw_version)

    # getting build data
      raw_build=$(curl -s "$entrypoint/projects/$project/versions/$version/builds/$build")

    jarname=$(jq -r '.downloads.application.name' <<< $raw_build)
    jarsum=$(jq -r '.downloads.application.sha256' <<< $raw_build)
    jarurl="$entrypoint/projects/$project/versions/$version/builds/$build/downloads/$jarname"    

    unset raw_project
    unset raw_version
    unset raw_build
    ;;

  # from purpurmc.org
  purpur)
    [[ -z $entrypoint ]] && entrypoint=$entrypoint_purpur

    # getting project data
    raw_project=$(curl -s "$entrypoint/$project")

    [[ -z $version ]] && \
      version=$(jq -r '.versions[-1]' <<< $raw_project)

    # getting version data
      raw_version=$(curl -s "$entrypoint/$project/$version")

    [[ -z $build ]] && \
      build=$(jq -r '.builds.all[-1]' <<< $raw_version)

    # getting build data
      raw_build=$(curl -s "$entrypoint/$project/$version/$build")

    jarname="${project}-${version}-${build}.jar"
    jarsum=$(jq -r '.md5' <<< $raw_build)
    jarurl="$entrypoint/$project/$version/$build/download"
    sumbin="md5sum"

    unset raw_project
    unset raw_version
    unset raw_build
  ;;

  *)
  echo "'$PROJECT' is not supported project name"
  exit 1
  ;;

esac

jarpath="/tmp/$jarname"

echo $jarname
echo $jarurl
echo $jarsum

# if cached jar already exists, check checksum
[[ ! -z $jarsum && -f $jarpath ]] &&
  [[ $jarsum != $(sh -c "$sumbin $jarpath" | awk '{print $1}') ]] &&
    echo "캐시된 jar 파일의 체크섬이 일치하지 않습니다!" && rm $jarpath

# caching jar file
if [[ ! -f $jarpath ]]; then
  curl -o $jarpath $jarurl

  if [[ ! -z $jarsum && $jarsum != $(sh -c "$sumbin $jarpath" | awk '{print $1}') ]]; then
    echo "받아온 jar 파일의 체크섬이 일치하지 않습니다!"
    exit 1
  fi
fi

# clean up
unset jarname
unset jarsum
unset jarurl

java $JVM_ARGS -jar $jarpath $JAR_ARGS