launcher.py

import backend as b
import os
import getpass
import shutil
import argparse

parser = argparse.ArgumentParser(description='A modswitcher minecraft launcher')
parser.add_argument("-v", required=False, help="Version you want to launch", default=None)
args = parser.parse_args()

localuser = str(getpass.getuser())
dir = f'C:/Users/{localuser}/AppData/Roaming/.minecraft'
modsDir = rf'C:/Users/{localuser}/AppData/Roaming/.minecraft/mods/'

def deleteOnlyJar(path):
    files = os.listdir(path)
    for i in files:
        if ".jar" in i:
            os.remove(path + "/" + i)

def copyAllJars(version):
    shutil.copytree(f"{modsDir}{version}", modsDir, dirs_exist_ok=True)


if args.v == None:
    '''
    You'll want to change these versions to whatever suits your needs
    '''

    print("================================================")
    print("1) LabyMod")
    print("2) Fabric 1.17")
    print("3) Forge 1.12")
    print("================================================")

    choice = input("Please choose a version from above: ")
else:
    choice = args.v
    
if choice == "1":
    deleteOnlyJar(modsDir)
    copyAllJars("1.8")
    b.launch("1.8.9-forge1.8.9-11.15.1.2318-1.8.9", javaVersion=r"C:\Program Files\Java\jre1.8.0_291\bin\java.exe")
if choice == "2":
    deleteOnlyJar(modsDir)
    copyAllJars("1.17")
    b.launch("fabric-loader-0.11.6-1.17")