Download PaperMC's server file. Defaults to the latest version.

get-paper-server.sh

#!/usr/bin/bash

if [ $1 == "--help" ] || [ $1 == "-h" ]; then
    echo "USAGE: $(basename "$0") [minecraft_version] [paper_build]"
    exit 0
fi

URL="https://api.papermc.io/v2/projects/paper"

if [ $# -lt 1 ]; then
    echo "Getting latest Minecraft version since \$1 was empty"
    VERSION=$(curl -SsL ${URL} | jq --raw-output ".versions[-1]")
else
    VERSION="$1"
fi
echo "- Got Minecraft version: ${VERSION}"

URL="${URL}/versions/${VERSION}"

if [ $# -lt 2 ]; then
    echo "Getting latest build for Minecraft ${VERSION} since \$2 was empty"
    BUILD=$(curl -SsL ${URL} | jq --raw-output ".builds[-1]")
else
    BUILD="$2"
fi
echo "- Got Paper build: #${BUILD}"

URL="${URL}/builds/${BUILD}"

echo "Getting JAR name for Minecraft ${VERSION} (#${BUILD}) from '${URL}'..."
PAPER_JAR=$(curl -SsL ${URL} | jq --raw-output ".downloads.application.name")
echo "- Got file name: '${PAPER_JAR}'"

URL="${URL}/downloads/${PAPER_JAR}"
FILE="$(pwd)/${PAPER_JAR}"

if [ ! -f $FILE ]; then
    echo "There is no file named '${PAPER_JAR}' in '$(pwd)'"
    echo "Getting data for '${PAPER_JAR}' from '${URL}'..."
    curl -SsL ${URL} --output ${FILE}
    echo "Data successfully written to file '${FILE}'"
else
    echo "File already exists '${FILE}'"
fi