docker-minecraft-server/scripts/start-configuration

#!/bin/bash
set -euo pipefail
IFS=$'\n\t'

# shellcheck source=start-utils
. "${SCRIPTS:-/}start-utils"

: "${EULA:=}"
: "${PROXY:=}"
: "${ENABLE_AUTOPAUSE:=false}"
: "${ENABLE_AUTOSTOP:=false}"
: "${RCON_CMDS_STARTUP:=}"
: "${RCON_CMDS_ON_CONNECT:=}"
: "${RCON_CMDS_ON_DISCONNECT:=}"
: "${RCON_CMDS_FIRST_CONNECT:=}"
: "${RCON_CMDS_LAST_DISCONNECT:=}"
: "${RCON_CMDS_PERIOD:=10}"
: "${ENABLE_RCON:=true}"
: "${RCON_PORT:=25575}"
export ENABLE_RCON RCON_PORT

: "${MEMORY=1G}"
: "${INIT_MEMORY=${MEMORY}}"
: "${MAX_MEMORY=${MEMORY}}"
export MEMORY INIT_MEMORY MAX_MEMORY

shopt -s nullglob

isDebugging && set -x

#umask 002
export HOME=/data

log "Running as uid=$(id -u) gid=$(id -g) with /data as '$(ls -lnd /data)'"

if [ ! -e /data/eula.txt ]; then
  if ! isTrue "$EULA"; then
    log ""
    log "Please accept the Minecraft EULA at"
    log "  https://account.mojang.com/documents/minecraft_eula"
    log "by adding the following immediately after 'docker run':"
    log "  -e EULA=TRUE"
    log ""
    exit 1
  fi

  writeEula
fi

if isTrue "${DEBUG_MEMORY:-false}"; then
  log "Memory usage and availability (in MB)"
  uname -a
  free -m
fi

##########################################
# Setup RCON password

if isTrue "${ENABLE_RCON:-true}"; then
  if [[ -v RCON_PASSWORD_FILE ]]; then
    if [ ! -e "${RCON_PASSWORD_FILE}" ]; then
      log ""
      log "Initial RCON password file ${RCON_PASSWORD_FILE} does not seems to exist."
      log "Please ensure your configuration."
      log "If you are using Docker Secrets feature, please check this for further information: "
      log " https://docs.docker.com/engine/swarm/secrets"
      log ""
      exit 1
    else
      RCON_PASSWORD=$(cat "${RCON_PASSWORD_FILE}")
      export RCON_PASSWORD
    fi
  elif ! [[ -v RCON_PASSWORD ]]; then
    RCON_PASSWORD=$(openssl rand -hex 12)
    export RCON_PASSWORD
  fi

  # For rcon-cli access running via exec, which by default is running as root
  echo "password=${RCON_PASSWORD}" > "$HOME/.rcon-cli.env"
  echo "password: \"${RCON_PASSWORD}\"" > "$HOME/.rcon-cli.yaml"
else
  rm -f "$HOME/.rcon-cli.env" "$HOME/.rcon-cli.yaml"
fi


##########################################
# Auto-pause/stop

if isTrue "${ENABLE_AUTOPAUSE}" && isTrue "${EXEC_DIRECTLY:-false}"; then
    log "EXEC_DIRECTLY=true is incompatible with ENABLE_AUTOPAUSE=true"
    exit 1
fi

if isTrue "${ENABLE_AUTOPAUSE}" && isTrue "${ENABLE_AUTOSTOP}"; then
    log "ENABLE_AUTOPAUSE=true is incompatible with ENABLE_AUTOSTOP=true"
    exit 1
fi

if [[ $PROXY ]]; then
    export http_proxy="$PROXY"
    export https_proxy="$PROXY"
    export JAVA_TOOL_OPTIONS+="-Djava.net.useSystemProxies=true"
    log "INFO: Giving proxy time to startup..."
    sleep 5
fi

function fixJavaPath() {
  # Some Docker management UIs grab all the image declared variables and present them for configuration.
  # When upgrading images across Java versions, that creates a mismatch in PATH's expected by base image.
  if ! which java > /dev/null; then
    log "ERROR: your Docker provider has an annoying flaw where it"
    log "       tries to set PATH even though the container establishes"
    log "       a very specific value."
    sleep 2
    # now find where java might be
    for d in /opt/java/openjdk/bin /usr/bin; do
      if [ -x "${d}/java" ]; then
        PATH="${PATH}:${d}"
        return 0
      fi
    done
    return 1
  fi
}


if ! fixJavaPath; then
  log "ERROR: could not locate path that contains java"
  exit 1
fi

cd /data || exit 1

export DECLARED_TYPE=${TYPE^^}
export DECLARED_VERSION="$VERSION"

if isTrue "${ENABLE_AUTOPAUSE}"; then
  "${SCRIPTS:-/}start-autopause"
fi

if isTrue "${ENABLE_AUTOSTOP}"; then
  "${SCRIPTS:-/}start-autostop"
fi

if 
  [[ "$RCON_CMDS_STARTUP" ]] ||
  [[ "$RCON_CMDS_ON_CONNECT" ]] ||
  [[ "$RCON_CMDS_ON_DISCONNECT" ]] || 
  [[ "$RCON_CMDS_FIRST_CONNECT" ]] || 
  [[ "$RCON_CMDS_LAST_DISCONNECT" ]]
then
  log "Starting RCON commands"
  # shellcheck source=start-rconcmds
  "${SCRIPTS:-/}start-rconcmds"
fi

: "${MOD_PLATFORM:=}"
case "${TYPE^^}" in
  AUTO_CURSEFORGE|MODRINTH|CURSEFORGE|FTB|FTBA)
    MOD_PLATFORM="$TYPE"
  ;;
esac

if [[ $MOD_PLATFORM ]]; then
  case "${MOD_PLATFORM^^}" in
    FTB|CURSEFORGE)
      exec "${SCRIPTS:-/}start-deployCF" "$@"
    ;;

    FTBA)
      exec "${SCRIPTS:-/}start-deployFTBA" "$@"
    ;;

    AUTO_CURSEFORGE)
      exec "${SCRIPTS:-/}start-deployAutoCF" "$@"
      ;;

    MODRINTH)
      exec "${SCRIPTS:-/}start-deployModrinth" "$@"
      ;;

    *)
      log "ERROR; Invalid MOD_PLATFORM: '$MOD_PLATFORM'"
      exit 1
      ;;
  esac
fi

log "Resolving type given ${TYPE}"
case "${TYPE^^}" in
  *BUKKIT|SPIGOT)
    exec "${SCRIPTS:-/}start-deployBukkitSpigot" "$@"
  ;;

  PAPER)
    exec "${SCRIPTS:-/}start-deployPaper" "$@"
  ;;

  FOLIA)
    exec "${SCRIPTS:-/}start-deployFolia" "$@"
  ;;

  FORGE)
    exec "${SCRIPTS:-/}start-deployForge" "$@"
  ;;

  NEOFORGE|NEOFORGED)
    exec "${SCRIPTS:-/}start-deployNeoForge" "$@"
  ;;

  FABRIC)
    exec "${SCRIPTS:-/}start-deployFabric" "$@"
  ;;

  QUILT)
    exec "${SCRIPTS:-/}start-deployQuilt" "$@"
  ;;
  
  VANILLA)
    exec "${SCRIPTS:-/}start-deployVanilla" "$@"
  ;;

  SPONGEVANILLA)
    exec "${SCRIPTS:-/}start-deploySpongeVanilla" "$@"
  ;;

  CUSTOM)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployCustom" "$@"
  ;;

  MAGMA)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployMagma" "$@"
  ;;

  MAGMA_MAINTAINED)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployMagmaMaintained" "$@"
  ;;

  KETTING)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployKetting" "$@"
  ;;

  MOHIST)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployMohist" "$@"
  ;;

  CATSERVER)
    evaluateJavaCompatibilityForForge
    exec "${SCRIPTS:-/}start-deployCatserver" "$@"
  ;;

  PURPUR)
    exec "${SCRIPTS:-/}start-deployPurpur" "$@"
  ;;

  PUFFERFISH)
    exec "${SCRIPTS:-/}start-deployPufferfish" "$@"
  ;;

  CANYON)
    exec "${SCRIPTS:-/}start-deployCanyon" "$@"
  ;;

  LIMBO)
    exec "${SCRIPTS:-/}start-deployLimbo" "$@"
  ;;

  CRUCIBLE)
    exec "${SCRIPTS:-/}start-deployCrucible" "$@"
  ;;

  *)
      log "ERROR: Invalid TYPE: '$TYPE'"
      log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FOLIA, PURPUR, FABRIC, QUILT,"
      log "         SPONGEVANILLA, CUSTOM, MAGMA, MOHIST, CATSERVER, AIRPLANE, PUFFERFISH,"
      log "         CANYON, LIMBO, CRUCIBLE"
      exit 1
  ;;

esac