File size: 2,487 Bytes
16a4018 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 | #!/usr/bin/env python3
"""Pack the agent's proof into one file for the verifier.
Harbor runs this as a [[verifier.collect]] hook in the agent's sandbox after the agent finishes.
It clears /logs/artifacts and writes /logs/artifacts/submission.tar holding only regular
`Submission.lean` and `Submission/**.lean` files. Symlinks and other entries are skipped, never
followed, so only one plain file crosses to the verifier sandbox.
The agent's sandbox is untrusted, so the verifier re-checks every entry of the archive. This step
only keeps the transfer small and free of links.
"""
from __future__ import annotations
import os
import shutil
import stat
import tarfile
from pathlib import Path
WORKSPACE = Path("/workspace")
OUT_DIR = Path("/logs/artifacts")
MAX_TOTAL_BYTES = 768 << 20
def clear(directory: Path) -> None:
directory.mkdir(parents=True, exist_ok=True)
for entry in directory.iterdir():
if entry.is_dir() and not entry.is_symlink():
shutil.rmtree(entry)
else:
entry.unlink()
def regular(path: Path) -> bool:
try:
return stat.S_ISREG(path.lstat().st_mode)
except OSError:
return False
def main() -> None:
clear(OUT_DIR)
tmp = OUT_DIR / "submission.tar.part"
total = 0
with tarfile.open(tmp, "w", format=tarfile.PAX_FORMAT) as tar:
root = WORKSPACE / "Submission.lean"
if regular(root):
total += root.lstat().st_size
if total > MAX_TOTAL_BYTES:
raise SystemExit("submission exceeds the size limit")
tar.add(root, arcname="Submission.lean", recursive=False)
tree = WORKSPACE / "Submission"
if tree.is_dir() and not tree.is_symlink():
for dirpath, dirnames, filenames in os.walk(tree, followlinks=False):
dirnames[:] = [d for d in dirnames if not (Path(dirpath) / d).is_symlink()]
for name in sorted(filenames):
path = Path(dirpath) / name
if not name.endswith(".lean") or not regular(path):
continue
total += path.lstat().st_size
if total > MAX_TOTAL_BYTES:
raise SystemExit("submission exceeds the size limit")
tar.add(path, arcname=str(path.relative_to(WORKSPACE)), recursive=False)
tmp.rename(OUT_DIR / "submission.tar")
print(f"packed {total} bytes")
if __name__ == "__main__":
main()
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