#!/usr/bin/env python3
"""Dev server. Identical to http.server except it refuses to let the browser cache
ES modules, which otherwise makes every edit look like it did nothing."""
import sys
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer


class NoCache(SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header("Cache-Control", "no-store, max-age=0")
        super().end_headers()

    def log_message(self, *a):
        pass


if __name__ == "__main__":
    port = int(sys.argv[1]) if len(sys.argv) > 1 else 8123
    print(f"handshake → http://localhost:{port}/")
    ThreadingHTTPServer(("127.0.0.1", port), NoCache).serve_forever()