#! /usr/bin/env python3# SPDX-License-Identifier: GPL-2.0## Copyright © 2025, Oracle and/or its affiliates.# Author: Vegard Nossum <vegard.nossum@oracle.com> """Generate HTML redirects for renamed Documentation/**.rst files usingthe output of tools/docs/gen-renames.py. Example:     tools/docs/gen-redirects.py --output Documentation/output/ < Documentation/.renames.txt""" import argparseimport osimport sys parser = argparse.ArgumentParser(description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter)parser.add_argument('-o', '--output', help='output directory') args = parser.parse_args() for line in sys.stdin:    line = line.rstrip('\n')     old_name, new_name = line.split(' ', 2)     old_html_path = os.path.join(args.output, old_name + '.html')    new_html_path = os.path.join(args.output, new_name + '.html')     if not os.path.exists(new_html_path):        print(f"warning: target does not exist: {new_html_path} (redirect from {old_html_path})")        continue     old_html_dir = os.path.dirname(old_html_path)    if not os.path.exists(old_html_dir):        os.makedirs(old_html_dir)     relpath = os.path.relpath(new_name, os.path.dirname(old_name)) + '.html'     with open(old_html_path, 'w') as f:        print(f"""\<!DOCTYPE html> <html lang="en"><head>    <title>This page has moved</title>    <meta http-equiv="refresh" content="0; url={relpath}"></head><body><p>This page has moved to <a href="{relpath}">{new_name}</a>.</p></body></html>""", file=f)