"""Fetch the pinned TensorFlow.js runtime beside the browser files."""
import hashlib
import json
from pathlib import Path
import urllib.request

root = Path(__file__).resolve().parent
vendor = root / "vendor"
vendor.mkdir(exist_ok=True)
manifest = json.loads((root / "vendor.json").read_text())
for name, entry in manifest.items():
    with urllib.request.urlopen(entry["url"], timeout=60) as response:
        content = response.read()
    if hashlib.sha256(content).hexdigest() != entry["sha256"]:
        raise ValueError(f"Checksum mismatch: {name}")
    (vendor / name).write_bytes(content)
    print(name)