docker-minecraft-server/scripts/start-setupWorld

#!/bin/bash

# shellcheck source=start-utils
. "${SCRIPTS:-/}start-utils"
set -e
isDebugging && set -x

if [ $TYPE = "CURSEFORGE" ]; then
  worldDest=$FTB_DIR/${LEVEL:-world}
else
  worldDest=/data/${LEVEL:-world}
fi

if [[ "$WORLD" ]] && ( isTrue "${FORCE_WORLD_COPY}" || [ ! -d "$worldDest" ] ); then
  if isTrue "${FORCE_WORLD_COPY}"; then
    log "Removing existing world data in $worldDest ${worldDest}_nether ${worldDest}_the_end"
    rm -rf "$worldDest" \
      "${worldDest}_nether" \
      "${worldDest}_the_end"
  fi

  if isURL $WORLD; then
    curl -fsSL "$WORLD" -o /tmp/world.zip
    zipSrc=/tmp/world.zip
  elif [[ "$WORLD" =~ .*\.zip ]]; then
    zipSrc="$WORLD"
  fi

  if [[ "$zipSrc" ]]; then
    log "Unzipping world"

    # Stage contents so that the correct subdirectory can be picked off
    mkdir -p /tmp/world-data
    (cd /tmp/world-data && unzip -o -q "$zipSrc")

    if [ "$TYPE" = "SPIGOT" ]; then
      baseDirs=$(find /tmp/world-data -name "level.dat" -not -path "*_nether*" -not -path "*_the_end*" -exec dirname "{}" \;)
    else
      baseDirs=$(find /tmp/world-data -name "level.dat" -exec dirname "{}" \;)
    fi

    count=$(echo "$baseDirs" | wc -l)
    if [[ $count -gt 1 ]]; then
      baseDir="$(echo "$baseDirs" | sed -n ${WORLD_INDEX:-1}p)"
      baseName=$(basename "$baseDir")
      log "WARN multiple levels found, picking: $baseName"
    elif [[ $count -gt 0 ]]; then
      baseDir="$baseDirs"
    else
      log "ERROR invalid world content"
      exit 1
    fi
    rsync --remove-source-files --recursive --delete "$baseDir/" "$worldDest"
    if [ "$TYPE" = "SPIGOT" ]; then
      log "Copying end and nether ..."
      [ -d "${baseDir}_nether" ] && rsync --remove-source-files --recursive --delete "${baseDir}_nether/" "${worldDest}_nether"
      [ -d "${baseDir}_the_end" ] && rsync --remove-source-files --recursive --delete "${baseDir}_the_end/" "${worldDest}_the_end"
    fi
  else
    log "Cloning world directory from $WORLD ..."
    rsync --recursive --delete "${WORLD%/}"/ "$worldDest"
  fi

  if [ "$TYPE" = "SPIGOT" ]; then
    # Reorganise if a Spigot server
    log "Moving End and Nether maps to Spigot location"
    [ -d "$worldDest/DIM1" ] && mv -f "$worldDest/DIM1" "${worldDest}_the_end"
    [ -d "$worldDest/DIM-1" ] && mv -f "$worldDest/DIM-1" "${worldDest}_nether"
  fi
fi

exec "${SCRIPTS:-/}start-setupModpack" "$@"