Method get_changed_chunks

src/pyspector/ast_cache.py:295–322

Return the IDs of top-level chunks that differ between two versions of a file, without updating the cache. Useful for incremental analysis drivers that want to know exactly what changed.

(
        self, file_path: Path, old_content: str, new_content: str
    )

            p.unlink(missing_ok=True)

    def get_changed_chunks(
        self, file_path: Path, old_content: str, new_content: str
    ) -> List[str]:
        """
        Return the IDs of top-level chunks that differ between two versions
        of a file, without updating the cache.  Useful for incremental
        analysis drivers that want to know exactly what changed.
        """
        def _chunk_hashes(source: str) -> Dict[str, str]:
            with warnings.catch_warnings():
                warnings.filterwarnings("ignore", category=SyntaxWarning)
                try:
                    tree = ast.parse(source, filename=str(file_path))
                except SyntaxError:
                    return {}
            lines = source.splitlines(keepends=True)
            seen: Dict[str, int] = {}
            out: Dict[str, str] = {}
            for node in tree.body:
                cid = _make_chunk_id(node, seen)
                out[cid] = hashlib.sha256(_source_slice(lines, node).encode()).hexdigest()
            return out

        old_h = _chunk_hashes(old_content)
        new_h = _chunk_hashes(new_content)
        changed = [cid for cid, h in new_h.items() if old_h.get(cid) != h]
        changed += [cid for cid in old_h if cid not in new_h]
        return changed

    # ── Internal ─────────────────────────────────────────────────────────────