entrypoint.sh

#!/bin/bash
set -e

# if worlds folder does not exist, create it
if [ ! -d "${DATA_DIR}/worlds" ]
then
 mkdir -p "${DATA_DIR}/worlds"
fi

if [ ! "$(ls -A ${SERVER_DIR}/worlds 2>/dev/null)" ]
then
  ln -s ${DATA_DIR}/worlds ${SERVER_DIR}/worlds
fi

# If server.properties file doesnt exist generate it
if [ ! -f "${SERVER_DIR}/server.properties" ]
then
  echo "Generating server configuration:"
  touch ${SERVER_DIR}/server.properties
  # Parse all environment variables beginning with MCPROP to generate server.properties
  # For each matching line
  #  - Get property name from beggining to first = sign
  #    - Remove MCPROP_ from beginning
  #    - Switch to lowercase
  #    - Convert _ to -
  #  - Get property value from everything after first = sign
  # Examples
  #  - MCPROP_ALLOW_CHEATS=true
  #    allow-cheats=true
  for P in ${!MCPROP_@}
  do
    PROP_VALUE="${!P}"
    PROP_NAME="${P#*_}"
    PROP_NAME="`echo ${PROP_NAME} | tr '[:upper:]' '[:lower:]'`"
    PROP_NAME="`echo ${PROP_NAME} | tr "_" "-"`"
    echo "${PROP_NAME}=${PROP_VALUE}" | tee -a ${SERVER_DIR}/server.properties
  done
fi

while read -r line
do
  PROP_NAME="${line%%=*}"
  PROP_VALUE="${line##${PROP_NAME}=}"
  PROP_NAME="`echo ${PROP_NAME} | tr '[:lower:]' '[:upper:]'`"
  PROP_NAME="`echo ${PROP_NAME} | tr "-" "_"`"
  eval "${PROP_NAME}=\"${PROP_VALUE}\""
done < "${SERVER_DIR}/server.properties"

LEVEL_NAME="${LEVEL_NAME:-"Bedrock level"}"

if [ ! -d "${DATA_DIR}/worlds/${LEVEL_NAME}" ]
then
  mkdir -p "${DATA_DIR}/worlds/${LEVEL_NAME}"
fi

# Link permission and whilelist
for f in permissions.json allowlist.json
do
	if [ ! -f "${SERVER_DIR}/${f}" ]
	then
	  if [ ! -f "${DATA_DIR}/worlds/${LEVEL_NAME}/${f}" ];
	  then
  		cp "${SERVER_DIR}/default/${f}" "${DATA_DIR}/worlds/${LEVEL_NAME}/${f}"
  	fi
  	ln -s "${DATA_DIR}/worlds/${LEVEL_NAME}/${f}" "${SERVER_DIR}/"
	fi
done

# Create Debug_Log
if [ ! -f "${SERVER_DIR}/Debug_Log.txt" ]
then
  touch "${SERVER_DIR}/Debug_Log.txt"
fi

# Create valid_known_packs
if [ ! -f "${SERVER_DIR}/valid_known_packs.json" ]
then
  if [ ! -f "${DATA_DIR}/worlds/${LEVEL_NAME}/valid_known_packs.json" ];
  then
    touch "${DATA_DIR}/worlds/${LEVEL_NAME}/valid_known_packs.json"
  fi
  ln -s "${DATA_DIR}/worlds/${LEVEL_NAME}/valid_known_packs.json" "${SERVER_DIR}/"
fi

# Link directories with defaults
for f in behavior_packs resource_packs
do
  # if directory doesn't exist create from minecraft default
	if [ ! -d "${SERVER_DIR}/${f}" ]
	then
	  if [ ! -d "${DATA_DIR}/${f}" ]
	  then
	    mkdir -p "${DATA_DIR}/${f}"
		fi
	  ln -s "${DATA_DIR}/${f}" "${SERVER_DIR}/${f}"
	fi
	for d in $(ls "${SERVER_DIR}/default/${f}")
	do
	  if [ ! -d "${DATA_DIR}/${f}/${d}" ]
	  then
	    ln -s "${SERVER_DIR}/default/${f}/${d}" "${DATA_DIR}/${f}/${d}"
	  fi
	done
done

exec "$@"