54 lines
2.0 KiB
Python
54 lines
2.0 KiB
Python
"""Download only pinned diagnostic assets into owned ignored data."""
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import argparse
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import hashlib
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import json
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from pathlib import Path
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import time
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import urllib.request
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import uuid
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ROOT = Path(__file__).resolve().parents[2]
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DESTINATION = ROOT / ".searchi" / "rerank-eval" / "model"
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def digest(path):
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checksum = hashlib.sha256()
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with path.open("rb") as handle:
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for chunk in iter(lambda: handle.read(65536), b""):
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checksum.update(chunk)
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return checksum.hexdigest()
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def main():
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parser=argparse.ArgumentParser()
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parser.add_argument("--reference",action="store_true")
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args=parser.parse_args()
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name="reference-manifest.json" if args.reference else "model-manifest.json"
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manifest = json.loads(Path(__file__).with_name(name).read_text(encoding="utf-8"))
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for item in manifest["files"]:
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destination = DESTINATION / item["path"]
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if destination.is_file() and destination.stat().st_size == item["bytes"] and digest(destination) == item["sha256"]:
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print("verified cache", item["path"], flush=True)
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continue
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destination.parent.mkdir(parents=True, exist_ok=True)
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temporary = destination.with_name(destination.name + "." + uuid.uuid4().hex + ".partial")
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total = 0
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start = time.monotonic()
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try:
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with urllib.request.urlopen(item["url"], timeout=20) as response, temporary.open("xb") as output:
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while chunk := response.read(65536):
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total += len(chunk)
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if total > item["bytes"] or time.monotonic() - start > 180:
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raise ValueError("Download exceeded size/deadline")
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output.write(chunk)
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if total != item["bytes"] or digest(temporary) != item["sha256"]:
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raise ValueError("Pinned asset hash/size mismatch")
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temporary.replace(destination)
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print("verified download", item["path"], total, flush=True)
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finally:
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temporary.unlink(missing_ok=True)
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if __name__ == "__main__":
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main()
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