AO2XP/install_update.py

import zipfile, tarfile, platform, os, time, shutil
from tkinter import Tk, HORIZONTAL
from tkinter.ttk import Progressbar, Label

ext = {
    "Windows": "zip",
    "Darwin": "zip",
    "Linux": "gz"
}


def extractzip(): # Mac
    archive = zipfile.ZipFile("update.zip")
    if platform.system() == "Darwin": shutil.rmtree("AO2XP.app", ignore_errors=True) # delete the old app package.
    archive.extractall() # extract the new version

    if os.path.exists("appbase"): # on a mac with the base folder moved out of .app Resources folder
        os.system("mv appbase AO2XP.app/Contents/Resources/") # put it back in place

def extractgz(): # Linux
    archive = tarfile.open("update.tar.gz")
    archive.extractall()


if os.path.exists("update." + ext[platform.system()]):
    window = Tk()
    window.title("AO2XP updater")
    window.wm_resizable(0,0)
    window.geometry("256x56")
    lb = Label(window)
    lb.pack()
    pb = Progressbar(orient=HORIZONTAL, mode="indeterminate")
    pb.pack()
    pb.start()

    lb["text"] = "Waiting 3 seconds for AO2XP to close..."
    time.sleep(3)
    lb["text"] = "Extracting update." + ext[platform.system()] + "..."
    globals()["extract" + ext[platform.system()]]() # call the extract function according to OS
    lb["text"] = "Done!\nYou can now start AO2XP."
    os.remove("update." + ext[platform.system()])
    time.sleep(4)

else:
    print "This program will be automatically run by AO2XP to apply updates.\nYou do not need to run this yourself."
    raw_input("Press enter to exit.\n")