A plugin deployer to a spigot server for testing

run.bash

#!/bin/bash

# How to run:
# Put this script where you want your servers to be located (in an empty folder)
# Have Java 17
# Have an internet connection
# And have an computer

if [ expr $# < 2 ]; then
    read -p "Enter the plugin version: " jarVersion
    read -p "Enter the plugin path: " jarPath
else
    jarVersion=$1
    jarPath=$2
fi

serverPath="${PWD##}/$jarVersion"
RAM_KB=$(grep MemTotal /proc/meminfo | awk '{print $2}')
RAM_MB=$(expr $RAM_KB / 1024)
SERVER_RAM_CAPACITY=$(expr $RAM_MB / 4) # Edit here the portion of your want that you want to be used by the server, the default is 1/4 of your RAM

if [[ "$jarVersion" == *"/"* ]]; then
    read -p "Hold up! Are you trying to use an external directory for the server? [Y/n]: " verification
fi

if [[ "$verification" == *"Y"* ]]; then
    read -p "So please enter the real version of the plugin: " jarVersion
    read -p "And the path from where do you want the plugin to be runned: " serverPath
else 
    if [[ "$verification" == *"N"* ]]; then
        echo "This is strange but I accept it."
    fi
fi

if [ ! -n `which java` ]; then
    echo "Java is not installed, please install Java to run the Spigot Build Tool and to run the server!"
    exit 0
fi

if [ -d "./$jarVersion" ]; then
    echo "dir existing"
else
    if [ ! -f "./BuildTool/Buildtool.jar" ]; then
        echo "Downloading build tool..."
        mkdir BuildTool
        wget -q https://hub.spigotmc.org/jenkins/job/BuildTools/lastSuccessfulBuild/artifact/target/BuildTools.jar -O ./BuildTool/BuildTool.jar
    fi

    mkdir "$serverPath"
    cd BuildTool/
    java -jar BuildTool/BuildTool.jar --rev $jarVersion -o $serverPath
    cd ..
    if [ ! $? -eq 0 ]; then
        echo "The server build didn't ran successfully, is your server path and/or server version correct? Please check the BuildTools logs at BuildTool/BuildTools.log.txt"
        exit 0
    fi

    if [ -f $jarPath ]; then
        mkdir "$serverPath/plugins/"
        mv $jarPath "$serverPath/plugins/"
    fi
fi

echo "The plugin move to the plugin folder succed, please wait for the server to start..."
echo $SERVER_RAM_CAPACITY
cd $jarVersion
java -jar -Xmx"$SERVER_RAM_CAPACITY"m $jarVersion/spigot-"$jarVersion".jar --nogui
cd ..
echo "Thanks for using this builder and runner, see you soon !"
exit 0