#!/usr/bin/env python3
"""Serve the deck for editing: like `python3 -m http.server`, but every
response says Cache-Control: no-store, so a plain reload always shows the
files as they are on disk. (The stock server sends Last-Modified and nothing
else, and browsers then keep the section files and the CSS for a while.)

    python3 slides/serve.py            # http://localhost:8765
    python3 slides/serve.py 8000
"""
import os
import sys
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer


class NoCacheHandler(SimpleHTTPRequestHandler):
    def end_headers(self):
        self.send_header("Cache-Control", "no-store")
        super().end_headers()

    def log_message(self, fmt, *args):
        pass  # quiet; errors still go through log_error


if __name__ == "__main__":
    port = int(sys.argv[1]) if len(sys.argv) > 1 else 8765
    os.chdir(os.path.dirname(os.path.abspath(__file__)))
    print(f"serving {os.getcwd()} on http://localhost:{port}/")
    ThreadingHTTPServer(("", port), NoCacheHandler).serve_forever()