Python: Software Version Checker

#!/usr/bin/env python3

# Version 21

# POSTED ONLINE: https://pastebin.com/Dp4dK0Mz

# SOURCE: https://stackoverflow.com/questions/3029816/how-do-i-get-a-thread-safe-print-in-python-2-6
# Python uses separate opcodes for object printing and newline printing.
# With multiple threads printing you would encounter newlines printed out of turn separate from the objects.
# Joining the strings before calling print(...) fixes the issue.
def safe_print(*args, sep=' ', end='\n', file=None, flush=False):
    # NOTE: Using end=None, or removing end='', will result in an extra newline in the output.
    print(sep.join(map(str, args)) + end, sep=sep, end='', file=file, flush=flush)

# -----

import asyncio
class App:
    def __init__(self, name, installedVersion, patternData, urlData):
        self.name = name
        self.installedVersion = installedVersion
        self.__pattern = patternData[0]
        self.__patternMatchIndex = patternData[1]
        self.__url = urlData[0]
        self.__urlEncoding = urlData[1]

    async def GetLatestVersion(self):
        loop = asyncio.get_running_loop()
        if 'api.github.com' in self.__url:
            latestVersion = await loop.run_in_executor(None, search_json, self.__pattern, self.__url, [0, 'name'], self.__urlEncoding, self.__patternMatchIndex)
        else:
            latestVersion = await loop.run_in_executor(None, search_url, self.__pattern, self.__url, self.__urlEncoding, self.__patternMatchIndex)
        return latestVersion

    async def DisplayStatus(self, skipUpToDate=True):
        latestVersion = await self.GetLatestVersion()
        upToDate = self.installedVersion == latestVersion
        if latestVersion == None:
            safe_print(color(' ! {}: Failed to detect the latest version (Installed Version: {} --> ?)\n   URL: {}\n'.format(self.name, self.installedVersion, self.__url), RED))
        elif not upToDate:
            safe_print(color(' * {}: Update detected (Installed Version: {} --> {})\n   URL: {}\n'.format(self.name, self.installedVersion, latestVersion, self.__url), YELLOW))
        elif not skipUpToDate:
            safe_print(color(' - {}: No update detected (Installed Version: {})\n'.format(self.name, latestVersion), GREEN))
        return not upToDate

# -----

import json
def search_json(pattern, url, indicies, encoding='UTF-8', matchIndex=0, timeoutSeconds=5):
    response = download_url(url, encoding, timeoutSeconds)
    if response == None:
        return None
    data = json.loads(response)
    for index in indicies:
        data = data[index]
    return regex_search(data, pattern, matchIndex)

def search_url(pattern, url, encoding='UTF-8', matchIndex=0, timeoutSeconds=5):
    response = download_url(url, encoding, timeoutSeconds)
    return regex_search(response, pattern, matchIndex)

# -----

import urllib.request
from urllib.error import *
import socket
def download_url(url, encoding='UTF-8', timeoutSeconds=5):
    try:
        response = urllib.request.urlopen(url, timeout=timeoutSeconds, context=unverifiedContext).read().decode(encoding)
    except HTTPError as error:
        safe_print('   HTTP-Error: Data not retrieved because {}\n   URL: {}\n'.format(error, url))
    except URLError as error:
        if isinstance(error.reason, socket.timeout):
            safe_print('   Timeout-Error: Data not retrieved because {}\n   URL: {}\n'.format(error, url))
        else:
            safe_print('   URL-Error: Data not retrieved because {}\n   URL: {}\n'.format(error, url))
    else:
        return response

# Disable certificate verification with unverified SSL context.
# SOURCE: https://support.chainstack.com/hc/en-us/articles/9117198436249-Common-SSL-Issues-on-Python-and-How-to-Fix-it
import ssl
unverifiedContext = ssl._create_unverified_context()

import re
def regex_search(string, pattern, matchIndex=0):
    if string == None:
        return None
    matches = re.findall(pattern, string)
    if matches == None or len(matches) == 0:
        return None
    return matches[matchIndex]

# -----

# BLACK = '\033[30m'
RED = '\033[31m'
GREEN = '\033[32m'
YELLOW = '\033[33m'
BLUE = '\033[34m'
MAGENTA = '\033[35m'
CYAN = '\033[36m'
WHITE = '\033[37m'
UNDERLINE = '\033[4m'
RESET = '\033[0m'

def color(var, color):
    return color + str(var) + RESET

import platform
system = platform.system()
if system == 'Windows':
    import os
    # Needed to display colored text on Windows for some reason.
    os.system('cls')

# -----

# NOTE: You need to update these installed-version numbers manually, until you find a way to query them from the installed software directly.
apps = [
    App('Voicemeeter Banana', '2.1.1.8', (r'Version ([0-9.]+)(?: \([\w\s]+\))', 1),          ('https://voicemeeter.com', 'UTF-8')),
  # App('Voicemeeter Banana', '2.0.6.8', (r'Voicemeeter ([0-9.]+) \(ZIP Package\)', 0),      ('https://vb-audio.com/Voicemeeter/banana.htm', 'UTF-8')), # This website keeps dying...
    App('Equalizer APO',      '1.4',     (r'EqualizerAPO64-([0-9.]+)\.exe', 0),              ('https://sourceforge.net/projects/equalizerapo/files/', 'UTF-8')),
    App('HeSuVi',             '2.0.0.1', (r'HeSuVi_([0-9.]+)\.exe', 0),                      ('https://sourceforge.net/projects/hesuvi/files/', 'UTF-8')),
    App('IEM Plug-in Suite',  '1.14.1',  (r'Latest version: <strong>v([0-9.]+)', 0),         ('https://plugins.iem.at/download/', 'UTF-8')),
  # App('Vim',                '9.1',     (r'Vim ([0-9.]+) is the latest stable version', 0), ('https://www.vim.org/download.php/', 'ISO-8859-1')), # This website keeps dying...
    App('Vim',                '9.1',     (r'\d+\.\d+', 0),                                   ('https://api.github.com/repos/vim/vim/tags', 'UTF-8')),
    App('Nvidia',             '566.03',  (r'GeForce ([0-9.]+)', 0),                          ('https://www.guru3d.com/files/category/videocards-nvidia-geforce-windows-7-8-10/', 'UTF-8')),
]

async def main():
    import sys
    pauseNeeded = len(sys.argv) == 1 or sys.argv[1] != 'nopause'
    updateNeeded = False
    tasks = [app.DisplayStatus(skipUpToDate=not pauseNeeded) for app in apps]
    for future in asyncio.as_completed(tasks):
        updateNeeded |= await future

    if pauseNeeded or updateNeeded:
        wait_for_any_keypress()

# ----- Press any key to continue -----

def wait_for_any_keypress():
    import sys
    if sys.platform == 'win32':
        import os
        os.system('pause')
    elif sys.platform.startswith('linux') or sys.platform == 'darwin':
        print('Press any key to continue . . .')
        import termios
        import tty
        stdin_file_desc = sys.stdin.fileno()
        old_stdin_tty_attr = termios.tcgetattr(stdin_file_desc)
        try:
            tty.setraw(stdin_file_desc)
            sys.stdin.read(1)
        finally:
            termios.tcsetattr(stdin_file_desc, termios.TCSADRAIN, old_stdin_tty_attr)

# -----

if __name__ == '__main__':
    asyncio.run(main())