Start modularising tcllib.

tcllib/argparser.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+
+# pylint: disable=C0111,C0326
+
+import argparse
+import webbrowser
+
+class DefaultParser(argparse.ArgumentParser):
+    def __init__(self, appname, desc=None):
+        super().__init__(prog=appname, description=desc, epilog="https://github.com/mbirth/tcl_ota_check")
+        self.add_argument("--webdb", help="open web database in browser and exit", action="store_true")
+
+    def parse_args(self, args=None, namespace=None):
+        if set(args) & {"--webdb"}:  # if they intersect
+            webbrowser.open("https://tclota.birth-online.de/", new=2)
+            raise SystemExit
+        else:
+            argx = super().parse_args(args, namespace)
+            return argx