docker-minecraft-server/scripts/start-deployPurpur

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

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

: "${VANILLA_VERSION:?}"
: "${PURPUR_BUILD:=LATEST}"
: "${FORCE_REDOWNLOAD:=false}"

if [[ ${PURPUR_BUILD} == LATEST ]]; then
  if ! PURPUR_BUILD=$(get --json-path=".builds.latest" "https://api.purpurmc.org/v2/purpur/${VANILLA_VERSION}"); then
    log "ERROR: Failed to locate a Purpur build for ${VANILLA_VERSION}."
    log "       Please check if a download is available at https://purpur.pl3x.net/downloads/"
    exit 1
  fi
fi

export SERVER="purpur-${VANILLA_VERSION}-${PURPUR_BUILD}.jar"

if [ ! -f "$SERVER" ] || isTrue "$FORCE_REDOWNLOAD"; then
    downloadUrl="https://api.purpurmc.org/v2/purpur/${VANILLA_VERSION}/${PURPUR_BUILD}/download"
    log "Downloading Purpur from $downloadUrl ..."
    if ! get -o "$SERVER" "$downloadUrl"; then
      log "ERROR: failed to download from $downloadUrl (status=$?)"
      exit 3
    fi
fi

# Normalize on Spigot for later operations
export FAMILY=SPIGOT

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