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chore: import upstream snapshot with attribution
2026-07-13 12:37:18 +08:00

143 lines
4.4 KiB
Python

#!/usr/bin/env python3
"""
Generate HTML redirect files from redirects.json.
Usage:
python generate_redirects.py
This script reads redirects.json and generates individual HTML files
for each redirect path. Each HTML file uses meta refresh (0 delay)
which is SEO-friendly and treated similarly to 301 redirects by Google.
To add new redirects, simply edit redirects.json and re-run this script.
"""
import json
import os
from pathlib import Path
# Default fallback URL for any path not in the redirect map
DEFAULT_REDIRECT = "https://docs.langchain.com/oss/python/langgraph/overview"
HTML_TEMPLATE = """<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Redirecting...</title>
<link rel="canonical" href="{url}">
<meta name="robots" content="noindex">
<script>var anchor=window.location.hash.substr(1);location.href="{url}"+(anchor?"#"+anchor:"")</script>
<meta http-equiv="refresh" content="0; url={url}">
</head>
<body>
Redirecting...
</body>
</html>
"""
ROOT_HTML_TEMPLATE = """<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Redirecting to LangGraph Documentation</title>
<link rel="canonical" href="{url}">
<meta name="robots" content="noindex">
<script>var anchor=window.location.hash.substr(1);location.href="{url}"+(anchor?"#"+anchor:"")</script>
<meta http-equiv="refresh" content="0; url={url}">
</head>
<body>
<h1>Documentation has moved</h1>
<p>The LangGraph documentation has moved to <a href="{url}">docs.langchain.com</a>.</p>
<p>Redirecting you now...</p>
</body>
</html>
"""
CATCHALL_404_TEMPLATE = """<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Redirecting to LangGraph Documentation</title>
<link rel="canonical" href="{default_url}">
<meta name="robots" content="noindex">
<script>
// Catchall redirect for any unmapped paths
window.location.replace("{default_url}");
</script>
<meta http-equiv="refresh" content="0; url={default_url}">
</head>
<body>
<h1>Documentation has moved</h1>
<p>The LangGraph documentation has moved to <a href="{default_url}">docs.langchain.com</a>.</p>
<p>Redirecting you now...</p>
</body>
</html>
"""
def generate_redirects():
script_dir = Path(__file__).parent
output_dir = script_dir / "_site"
# Load redirects
with open(script_dir / "redirects.json") as f:
redirects = json.load(f)
# Clean output directory
if output_dir.exists():
import shutil
shutil.rmtree(output_dir)
output_dir.mkdir(parents=True)
# Generate individual HTML files for each redirect
for old_path, new_url in redirects.items():
# Remove leading slash and create directory structure
path = old_path.lstrip("/")
# Check if path has a file extension (e.g., .txt, .xml)
# If so, create the file directly instead of a directory with index.html
path_obj = Path(path)
has_extension = path_obj.suffix and len(path_obj.suffix) <= 5
if not path:
html_path = output_dir / "index.html"
elif has_extension:
# For files with extensions, create the file directly
html_path = output_dir / path
else:
# For directory-style URLs, create index.html inside
html_path = output_dir / path / "index.html"
# Create parent directories
html_path.parent.mkdir(parents=True, exist_ok=True)
# Write the redirect HTML
html_path.write_text(HTML_TEMPLATE.format(url=new_url))
print(f"Created: {html_path}")
# Create root index.html
root_index = output_dir / "index.html"
if not root_index.exists():
root_index.write_text(ROOT_HTML_TEMPLATE.format(url=DEFAULT_REDIRECT))
print(f"Created: {root_index}")
# Create 404.html for catchall
catchall_404 = output_dir / "404.html"
catchall_404.write_text(CATCHALL_404_TEMPLATE.format(default_url=DEFAULT_REDIRECT))
print(f"Created: {catchall_404}")
# Copy static files (like llms.txt) that can't be redirected via HTML
static_files = ["llms.txt"]
for static_file in static_files:
src = script_dir / static_file
if src.exists():
dst = output_dir / static_file
dst.write_text(src.read_text())
print(f"Copied: {dst}")
print(f"\nGenerated {len(redirects)} redirect files in {output_dir}")
if __name__ == "__main__":
generate_redirects()