docker-minecraft-server/scripts/start-deployPaper

#!/bin/bash

# shellcheck source=start-utils
. "${SCRIPTS:-/}start-utils"
set -o pipefail
handleDebugMode

: "${PAPER_PROJECT:=paper}"
: "${PAPERBUILD:=}"
: "${PAPER_DOWNLOAD_URL:=}"
: "${PAPER_CUSTOM_JAR:=}"

resultsFile=/data/.paper.env
if [[ $PAPER_CUSTOM_JAR ]]; then
  export SERVER="$PAPER_CUSTOM_JAR"
elif [[ $PAPER_DOWNLOAD_URL ]]; then
  if ! mc-image-helper install-paper \
    --output-directory=/data \
    --results-file="$resultsFile" \
    --url="$PAPER_DOWNLOAD_URL}"; then
      log "ERROR: failed to download from custom PaperMC URL"
      exit 1
  fi
  # grab SERVER and export it
  set -a
  # shellcheck disable=SC1090
  source "${resultsFile}"
  set +a

else
  args=(
    --output-directory=/data
    --results-file="$resultsFile"
    --project="$PAPER_PROJECT"
    --version="$VERSION"
  )
  if [[ $PAPERBUILD ]]; then
    args+=(--build="$PAPERBUILD")
  fi
  if ! mc-image-helper install-paper "${args[@]}"; then
      log "ERROR: failed to download $PAPER_PROJECT"
      exit 1
  fi
  # grab SERVER and export it
  set -a
  # shellcheck disable=SC1090
  source "${resultsFile}"
  set +a

fi

# Normalize on Spigot for downstream operations
export FAMILY=SPIGOT

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