snapshot.py
python
| 1 | """Pure snapshot hashing utilities retained for MuseHub tests. |
| 2 | |
| 3 | The full snapshot module was extracted to cgcardona/muse. |
| 4 | Only compute_snapshot_id and compute_commit_id are retained here |
| 5 | because MuseHub test fixtures use them to generate deterministic IDs. |
| 6 | |
| 7 | TODO(musehub-extraction): remove when MuseHub is extracted. |
| 8 | """ |
| 9 | from __future__ import annotations |
| 10 | |
| 11 | import hashlib |
| 12 | |
| 13 | |
| 14 | def compute_snapshot_id(manifest: dict[str, str]) -> str: |
| 15 | """Return sha256 of the sorted ``path:object_id`` pairs.""" |
| 16 | parts = sorted(f"{path}:{oid}" for path, oid in manifest.items()) |
| 17 | payload = "|".join(parts).encode() |
| 18 | return hashlib.sha256(payload).hexdigest() |
| 19 | |
| 20 | |
| 21 | def compute_commit_id( |
| 22 | parent_ids: list[str], |
| 23 | snapshot_id: str, |
| 24 | message: str, |
| 25 | committed_at_iso: str, |
| 26 | ) -> str: |
| 27 | """Return sha256 of the commit's canonical inputs.""" |
| 28 | parts = [ |
| 29 | "|".join(sorted(parent_ids)), |
| 30 | snapshot_id, |
| 31 | message, |
| 32 | committed_at_iso, |
| 33 | ] |
| 34 | payload = "|".join(parts).encode() |
| 35 | return hashlib.sha256(payload).hexdigest() |