A wrapper script for Cygwin's setup.exe, with argparse-based command line handling.

CygwinSetup.py

#!/usr/bin/env python

from argparse import ArgumentParser
from itertools import chain
import os
import subprocess
try:
    import urllib.request as urllib
except ImportError:
    import urllib

setupExe = "/setup/setup-x86_64.exe"

parser = ArgumentParser(description="CLI wrapper for Cygwin setup.")
parser.add_argument("-d", action="store_true", help="download latest setup")
parser.add_argument("-l", action="store_true", help="list installed packages")
parser.add_argument("-v", action="store_true", help="list and verify packages")
parser.add_argument("-i", action="store_const", const="M", default="q", help="show UI installer")
parser.add_argument("-a", nargs="+", default=(), metavar="pkg", help="install a new package")
parser.add_argument("-x", nargs="+", default=(), metavar="pkg", help="uninstall a package")
parser.add_argument("-r", nargs="+", default=(), metavar="pkg", help="reinstall a package")
parser.add_argument("-u", action="store_const", const="g", default="", help="upgrade all packages")
parser.add_argument("-f", action="store_const", const="f", default="", help="force latest for all packages")
parser.add_argument("-o", action="store_const", const="o", default="", help="remove orphan packages")

args = parser.parse_args()

if args.d:
    print("https://www.cygwin.com/setup-x86_64.exe -> {0}".format(setupExe))
    urllib.urlretrieve("https://www.cygwin.com/setup-x86_64.exe", setupExe)
    os.chmod(setupExe, os.stat(setupExe).st_mode | 0o111)

if any((args.l, args.v)):
    cmd = ("/usr/bin/cygcheck", "-c{0}".format("d" if not args.v else ""))
    print("=> {0}".format(" ".join(cmd)))
    subprocess.Popen(cmd).wait()

if any(getattr(args, i) for i in "axrufo") or args.i == "M":
    cmd = (setupExe, "-Bn" + args.i + args.u + args.o) \
        + tuple(chain.from_iterable(("-P", pkg) for pkg in args.a)) \
        + tuple(chain.from_iterable(("-x", pkg) for pkg in args.x)) \
        + tuple(chain.from_iterable(("-x", pkg, "-P", pkg) for pkg in args.r))
    print("=> {0}".format(" ".join(cmd)))
    subprocess.Popen(cmd).wait()