#!/bin/bash function join_by() { local d=$1 shift echo -n "$1" shift printf "%s" "${@/#/$d}" } function get_major_version() { version=$1 echo "$version" | cut -d. -f 1-2 } function isURL() { local value=$1 if [[ ${value:0:8} == "https://" || ${value:0:7} == "http://" || ${value:0:6} == "ftp://" ]]; then return 0 else return 1 fi } function isValidFileURL() { suffix=${1:?Missing required suffix arg} url=${2:?Missing required url arg} [[ "$url" == http*://*.${suffix} || "$url" == http*://*.${suffix}\?* ]] } function resolveEffectiveUrl() { url="${1:?Missing required url argument}" if ! curl -Ls -o /dev/null -w %{url_effective} "$url"; then log "ERROR failed to resolve effective URL from $url" exit 2 fi } function getFilenameFromUrl() { url="${1:?Missing required url argument}" strippedOfQuery="${url%\?*}" basename "$strippedOfQuery" } function isTrue() { local oldState oldState=$(shopt -po xtrace) shopt -u -o xtrace local value=${1,,} result= case ${value} in true | on) result=0 ;; *) result=1 ;; esac eval "$oldState" return ${result} } function isDebugging() { if isTrue "${DEBUG:-false}"; then return 0 else return 1 fi } function handleDebugMode() { if isDebugging; then set -x extraCurlArgs=(-v) fi } function debug() { if isDebugging; then log "DEBUG: $*" fi } function logn() { echo -n "[init] $*" } function log() { local oldState # The return status when listing options is zero if all optnames are enabled, non- zero otherwise. oldState=$(shopt -po xtrace || true) shopt -u -o xtrace if isDebugging || isTrue "${LOG_TIMESTAMP:-false}"; then ts=" $(date --rfc-3339=seconds)" else ts= fi echo "[init]${ts} $*" eval "$oldState" } function logAutopause() { echo "[Autopause loop] $*" } function logAutopauseAction() { echo "[$(date -Iseconds)] [Autopause] $*" } function logAutostop() { echo "[Autostop loop] $*" } function logAutostopAction() { echo "[$(date -Iseconds)] [Autostop] $*" } function logRcon() { echo "[Rcon loop] $*" } function normalizeMemSize() { local scale=1 case ${1,,} in *k) scale=1024 ;; *m) scale=1048576 ;; *g) scale=1073741824 ;; esac val=${1:0:-1} echo $((val * scale)) } function versionLessThan() { mc-image-helper compare-versions "${VANILLA_VERSION}" lt "${1?}" } requireVar() { if [ ! -v $1 ]; then log "ERROR: $1 is required to be set" exit 1 fi if [ -z "${!1}" ]; then log "ERROR: $1 is required to be set" exit 1 fi } requireEnum() { var=${1?} shift for allowed in $*; do if [[ ${!var} = $allowed ]]; then return 0 fi done log "ERROR: $var must be set to one of $*" # exit 1 } function writeEula() { if ! echo "# Generated via Docker # $(date) eula=${EULA,,} " >/data/eula.txt; then log "ERROR: unable to write eula to /data. Please make sure attached directory is writable by uid=${UID}" exit 2 fi } function removeOldMods { if [ -d "$1" ]; then find "$1" -mindepth 1 -maxdepth ${REMOVE_OLD_MODS_DEPTH:-16} -wholename "${REMOVE_OLD_MODS_INCLUDE:-*}" -not -wholename "${REMOVE_OLD_MODS_EXCLUDE:-}" -delete fi } function get() { local flags=() if isTrue "${DEBUG_GET:-false}"; then flags+=("--debug") fi mc-image-helper "${flags[@]}" get "$@" } function isFamily() { for f in "${@}"; do if [[ ${FAMILY^^} == "${f^^}" ]]; then return 0 fi done return 1 } function isType() { for t in "${@}"; do # shellcheck disable=SC2153 if [[ $TYPE == "$t" ]]; then return 0 fi done return 1 } function evaluateJavaCompatibilityForForge() { javaRelease=$(mc-image-helper java-release) if versionLessThan 1.18 && (( javaRelease > 8 )); then log "**********************************************************************" log "WARNING: Some mods and modpacks may require Java 8." log " Please use itzg/minecraft-server:java8" log "**********************************************************************" sleep 5 fi } function extract() { src=${1?} destDir=${2?} type=$(file -b --mime-type "${src}") case "${type}" in application/zip) unzip -q -d "${destDir}" "${src}" ;; application/x-tar|application/gzip|application/x-gzip|application/x-bzip2|application/zstd|application/x-zstd) tar -C "${destDir}" -xf "${src}" ;; *) log "ERROR: unsupported archive type: $type" return 1 ;; esac } function getDistro() { cat /etc/os-release | grep -E "^ID=" | cut -d= -f2 | sed -e 's/"//g' } function checkSum() { local sum_file=${1?} # Get distro distro=$(getDistro) if [ "${distro}" == "debian" ] && sha1sum -c "${sum_file}" --status 2> /dev/null; then return 0 elif [ "${distro}" == "ubuntu" ] && sha1sum -c "${sum_file}" --status 2> /dev/null; then return 0 elif [ "${distro}" == "alpine" ] && sha1sum -c "${sum_file}" -s 2> /dev/null; then return 0 else return 1 fi }