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#!/bin/bash
#############################################################################################################
# Auto Update & Run PaperMC server script #
# by jiriks74 #
# https://github.com/jiriks74/start_papermc.sh #
# This script is under GPLv3, if you want to distribute changes you have to do so under the same license #
# and acknowledge the original script and author. #
#############################################################################################################
CURRENT_VERSION="1.0.0"
# --------------------------------------------------
# You shouldn't need to change anything in this file
# Settings are located in 'launch.cfg'
# --------------------------------------------------
#
# The url of the script (used for updating)
REPO_OWNER="jiriks74"
REPO_NAME="start_papermc.sh"
# API URL
api_url="https://api.papermc.io/v2/projects/paper/versions/$select_version/builds"
# Check for dependencies
function check_dependencies {
# Check if curl is installed
if ! command -v curl &> /dev/null
then
echo "Error: Curl is not installed"
exit 1
fi
# Check if jq is installed
if ! command -v jq &> /dev/null
then
echo "Error: jq is not installed"
exit 1
fi
# Check if awk is installed
if ! command -v awk &> /dev/null
then
echo "Error: awk is not installed"
exit 1
fi
}
# Check if the version and build are valid
function check_version_valid {
if curl -s "$api_url" | grep -q '{"error":"Version not found."}'; then
echo "Error: Invalid version selected: $select_version"
exit 2
else
# Check if selected build exists
if [ ! -z "$select_build" ]; then
if curl -Is "https://api.papermc.io/v2/projects/paper/versions/$select_version/builds/$select_build/downloads/paper-$select_version-$select_build.jar" | grep "HTTP/2 404" >/dev/null; then
echo "Error: Invalid build selected: $select_build"
exit 2
fi
fi
fi
}
# Ask if the user wants to continue anyway
# If the user doesn't answer in 15 seconds, the script will exit
function ask_continue {
if [[ $java_version_override != true ]]; then
answer=""
echo "You have 15 seconds to respond before the script exits."
read -t 15 -p "Do you want to continue anyway? [y/N]: " answer
if [[ $answer != "y" ]] && [[ $answer != "Y" ]]; then
echo "Exiting..."
exit 1
fi
fi
}
# Check if the correct version of Java is installed
# For version 1.8 to 1.11 use java 8
# For version 1.12 to 1.16.4 use java 11
# For version 1.16.5 use java 16
# For version 1.17.1 to 1.18.1+ use java 17
function check_java {
# Check if java is installed
if ! command -v java &> /dev/null
then
echo "Error: Java is not installed"
java_version="0"
fi
# Extract the middle number of the Minecraft version
minecraft_middle=$(echo "$select_version" | awk -F '.' '{print $2}')
# If java is installed, get the version (the java_version won't be 0)
if [[ $java_version != "0" ]]; then
# Get the current Java version and extract the build number
java_version=$(java -version 2>&1 | awk -F '"' '/version/ {print $2}' | awk -F '.' '{print $1}')
fi
# Check if the correct version of java is installed
if (( 8 <= minecraft_middle && minecraft_middle <= 11 )); then
if ! [[ $java_version -eq 8 ]]; then
echo "Java 8 is required for Minecraft version $select_version. Please install Java 8."
if [[ $java_version == 0 ]]; then
exit 3
fi
ask_continue
fi
elif (( 12 <= minecraft_middle && minecraft_middle <= 16 )); then
if ! [[ $java_version -eq 11 ]]; then
if [[ $java_version == 0 ]]; then
exit 3
fi
echo "Java 11 is required for Minecraft version $select_version. Please install Java 11."
ask_continue
fi
elif (( minecraft_middle == 17 )); then
if ! [[ $java_version -eq 16 ]]; then
echo "Java 16 is required for Minecraft version $select_version. Please install Java 16."
if [[ $java_version == 0 ]]; then
exit 3
fi
ask_continue
fi
elif (( 18 <= minecraft_middle )); then
if ! [[ $java_version -eq 17 ]]; then
echo "Java 17 is required for Minecraft version $select_version. Please install Java 17."
if [[ $java_version == 0 ]]; then
exit 3
fi
ask_continue
fi
else
echo "Unsupported Minecraft version $select_version."
if [[ $java_version == 0 ]]; then
exit 3
fi
ask_continue
fi
}
# Get existing version and build
function get_existing_version {
if ls paper-*.jar 1> /dev/null 2>&1; then
# Get the current server file name
server_file=$(basename ./paper-*.jar)
# Extract the version and build number using cut command
current_version=$(echo "$server_file" | cut -d'-' -f2)
current_build=$(echo "$server_file" | cut -d'-' -f3)
current_version="${current_version%-*}"
current_build="${current_build%.jar}"
echo "Current server file: $server_file"
echo " - Version $current_version"
echo " - Build $current_build"
else
echo "No old server file found."
server_file=false
fi
}
# Download server set by $select_version and $download_build
function download_server {
# Download the server
echo "Downloading PaperMC server..."
echo " - Version $select_version"
echo " - Build $download_build"
curl -s "https://api.papermc.io/v2/projects/paper/versions/$select_version/builds/$download_build/downloads/paper-$select_version-$download_build.jar" -o "./paper-$select_version-$download_build.jar"
echo "Download complete."
}
# Delete old server file with name $old_server_file
function delete_old_server {
# Delete the old server file
echo "Deleting old server file $server_file..."
rm "$old_server_file"
echo "Old server file deleted."
}
# Set arguments for java
function set_java_args {
# Check if $override_flags is not true
if [[ $override_flags != true ]]; then
if [[ "${mem%M}" -gt 12000 ]]; then
G1NewSize=40
G1MaxNewSize=50
G1HeapRegionSize=16M
G1Reserve=15
InitiatingHeapOccupancy=20
else
G1NewSize=30
G1MaxNewSize=40
G1HeapRegionSize=8M
G1Reserve=20
InitiatingHeapOccupancy=15
fi
# Aikar's flags are used by default
# See https://docs.papermc.io/paper/aikars-flags
java_launchoptions="-Xms$mem -Xmx$mem -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=$G1NewSize -XX:G1MaxNewSizePercent=$G1MaxNewSize -XX:G1HeapRegionSize=$G1HeapRegionSize -XX:G1ReservePercent=$G1Reserve -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=$InitiatingHeapOccupancy -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -Dusing.aikars.flags=https://mcflags.emc.gs -Daikars.new.flags=true"
fi
}
# Ask if the new server version differs from the old one
function ask_version_differs {
echo
echo
echo "The server version differs from the one you selected."
echo "The server version is $current_version and the selected version is $select_version."
echo "Do you want to update the server version?"
echo "This can cause many issues if you don't know what you are doing."
echo
echo "I am not responsible for any damage caused by updating the server version."
echo
echo "You have 15 seconds to respond, or the script will exit"
read -t 15 -p "Do you want to update the server version? [y/N] " version_differs
if [ "$version_differs" != "y" ] && [ "$version_differs" != "Y" ]; then
echo "Server version not updated."
echo "To start the server again with the current version, change the version in the config to $current_version."
exit 4
fi
if [ "$version_differs" == "y" ] || [ "$version_differs" == "Y" ]; then
read -t 15 -p "Are you sure you want to update the server version? [y/N] " version_differs
if [ "$version_differs" != "y" ] && [ "$version_differs" != "Y" ]; then
echo "Server version not updated."
echo "To start the server again with the current version, change the version in the config to $current_version."
exit 4
fi
fi
}
# Check if up to date
function check_up_to_date {
if [[ $server_file == false ]]; then
download_build=$latest_build
update_version=true
update_build=true
fi
# Check if $select_build is empty
if [[ -z $select_build ]]; then
# Check if the current version is the same as the one selected
if [[ $current_version == $select_version ]]; then
# Check if the current build is the same as the one selected
if [[ $current_build == $latest_build ]]; then
echo "Server is up to date."
else
echo "Server is not up to date."
download_build=$latest_build
update_build=true
fi
else
# Check if $server_file is false
if [[ $server_file != false ]]; then
ask_version_differs
echo "Server is not up to date."
download_build=$latest_build
update_version=true
fi
fi
else
# Check if the current version is the same as the one selected
if [[ $current_version == $select_version ]]; then
# Check if the current build is the same as the one selected
if [[ $current_build == $select_build ]]; then
echo "Server is up to date."
else
echo "Server is not up to date."
download_build=$select_build
update_build=true
fi
else
# Check if $server_file is false
if [[ $server_file != false ]]; then
ask_version_differs
echo "Server is not up to date."
download_build=$select_build
update_version=true
fi
fi
fi
}
# Get the latest build number
function get_latest_build {
# Get the latest build number
latest_build=$(curl -s $api_url | jq '.builds[-1].build')
}
# Check for updates
function check_and_update {
# Get current version and build
get_existing_version
echo Checking for updates...
# Get the latest build number
get_latest_build
# Check if the current version is up to date
check_up_to_date
# Check if $build_update is true or $version_update is true
if [[ $update_build == true ]] || [[ $update_version == true ]]; then
if [[ $server_file != false ]]; then
old_server_file=$server_file
server_file="paper-$select_version-$download_build.jar"
download_server
# Delete the old server file
delete_old_server
else
server_file="paper-$select_version-$download_build.jar"
download_server
fi
fi
}
# Accept EULA
function accept_eula {
if test "$(cat eula.txt 2>/dev/null)" != "eula=true"; then
echo
echo
echo "'eula.txt' does not exist or EULA is not accepted"
echo "You have to accept the Minecraft EULA to run the server"
echo "By entering 'y' you are indicating your agreement to Minecraft's EULA (https://aka.ms/MinecraftEULA)."
echo "You have 15 seconds to respond, or the script will exit"
read -t 15 -p "Do you agree to the Minecraft EULA? [y/N] " eula_agreed
if [ "$eula_agreed" == "y" ] || [ "$eula_agreed" == "Y" ]; then
if [ ! -f eula.txt ]; then
echo "eula=true" > eula.txt
else
rm eula.txt
echo "eula=true" > eula.txt
fi
echo
echo
echo "EULA accepted"
else
echo
echo
echo "You did not agree to the Minecraft EULA"
echo "Exiting..."
exit 1
fi
fi
}
# Launch the server
function launch_server {
echo
echo
echo "Starting the server..."
echo
echo
java $java_launchoptions -jar "$(basename ./paper-*.jar)" $mc_launchoptions
}
# Function to update the script
function check_self_update {
# Send a request to the GitHub API to retrieve the latest release
response=$(curl -sL "https://api.github.com/repos/$REPO_OWNER/$REPO_NAME/releases/latest")
# Extract the latest version from the response
LATEST_VERSION=$($response | jq -r ".tag_name")
# Compare the current version with the latest version
if [[ "$CURRENT_VERSION" != "$LATEST_VERSION" ]]; then
echo "An update is available!"
echo "Current version: $CURRENT_VERSION"
echo "Latest version: $LATEST_VERSION"
echo
echo "The script will continue in 15 seconds."
read -t 15 -p "Do you want to read the release notes? [y/N]"
if [ "$REPLY" == "y" ] || [ "$REPLY" == "Y" ]; then
# Extract the release notes from the response
RELEASE_NOTES=$(echo "$response" | jq -r ".body")
# Print the release notes
echo "$RELEASE_NOTES" | less
# Ask the user if they want to update
echo "The script will continue in 15 seconds."
echo "If you decide to update it is your responsibility to check the release notes for any breaking changes."
read -t 15 -p "Do you want to update? [y/N] " update
if [ "$update" == "y" ] || [ "$update" == "Y" ]; then
download_self_update
else
echo "Skipping update."
return
fi
fi
fi
# Download the update for the script
function self_update {
# Download the latest version of the script
echo "Updating script..."
if curl --fail -sLJO "https://github.com/$REPO_OWNER/$REPO_NAME/releases/download/$LATEST_VERSION/start.sh"; then
chmod +x script.sh
echo "Script updated successfully."
echo
read -p "Do you want to restart the script? [y/N] " restart
if [ "$restart" == "y" ] || [ "$restart" == "Y" ]; then
echo "Restarting..."
exec "./script.sh" "$@"
exit 0
else
echo "Exiting..."
exit 0
fi
else
echo "Failed to update script."
fi
}
# Load config
function load_config {
# Check if the config file exists
if [ ! -f launch.cfg ]; then
echo "Config file does not exist."
echo "Downloading the default config file..."
if curl --fail -sLJO "https://github.com/$REPO_OWNER/$REPO_NAME/releases/download/$CURRENT_VERSION/launch.cfg"; then
echo
read -p "Do you want to edit the config file? [y/N] " edit_config
if [ "$edit_config" == "y" ] || [ "$edit_config" == "Y" ]; then
if [ -z "$EDITOR" ]; then
echo "EDITOR is not set."
echo "Open 'launch.cfg' manually."
echo "Exiting..."
exit 1
else
echo "Opening the config file in $EDITOR..."
$EDITOR launch.cfg
fi
fi
else
echo "Failed to download the default config file."
echo "Go to the GitHub repository for more information:"
echo "https://github.com/$REPO_OWNER/$REPO_NAME"
echo "Exiting..."
exit 1
fi
fi
# Load config
source launch.cfg
}
# Main function
function main {
# Check for script updates
check_self_update
# Check dependencies
check_dependencies
# Check if the version and build are valid
check_version_valid
# Check if the correct java version is installed
check_java
# Check if the server is up to date and if not, update it
check_and_update
# Accept EULA
accept_eula
# Launch the server
launch_server
}
# Check for updates on GitHub
if [[ "$1" == "--redownload" ]]; then
self_update
else if [[ "$1" == "--help" ]]; then
echo "Usage: ./script.sh [OPTION]"
echo "Starts the Minecraft server."
echo
echo "Options:"
echo " --redownload Redownloads the script from GitHub."
echo " --help Show this help message."
echo
echo "To change the settings of the script, edit the 'launch.cfg' file."
echo "If the file does not exist, it will be downloaded automatically when the script is run and you will be asked if you want to edit it."
echo
echo "For more information, see:"
echo "https://github.com/$GITHUB_USER/$GITHUB_REPO"
else
# Run the main function
main
fi
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