Add main CLI function, shows version and homepage

pywidevine/main.py

@@ -0,0 +1,25 @@
+import logging
+from datetime import datetime
+
+import click
+
+from pywidevine import __version__
+
+
+@click.group(invoke_without_command=True)
+@click.option("-v", "--version", is_flag=True, default=False, help="Print version information.")
+@click.option("-d", "--debug", is_flag=True, default=False, help="Enable DEBUG level logs.")
+def main(version: bool, debug: bool) -> None:
+    """pywidevine—Python Widevine CDM implementation."""
+    logging.basicConfig(level=logging.DEBUG if debug else logging.INFO)
+    log = logging.getLogger()
+
+    copyright_years = 2022
+    current_year = datetime.now().year
+    if copyright_years != current_year:
+        copyright_years = f"{copyright_years}-{current_year}"
+
+    log.info(f"pywidevine version {__version__} Copyright (c) {copyright_years} rlaphoenix")
+    log.info("https://github.com/rlaphoenix/pywidevine")
+    if version:
+        return