| """Render an isolated four-file scene while denying reads of original sources. |
| |
| Uses temporary hardlinks (or copies across devices) under replay. Never changes |
| source files. Python audit hooks reject reads from the original dataset and old |
| transition directory, including backups. This is a runtime dependency test, not |
| a clean-machine installation or sandbox/security guarantee. |
| """ |
| import argparse |
| import json |
| import os |
| from pathlib import Path |
| import shutil |
| import sys |
| import tempfile |
|
|
|
|
| def main(): |
| p = argparse.ArgumentParser(description=__doc__) |
| p.add_argument('--scene', type=Path, required=True) |
| p.add_argument('--output-dir', type=Path, required=True) |
| p.add_argument('--device', default='cuda:2') |
| p.add_argument('--deny-root', type=Path, action='append', default=[]) |
| args = p.parse_args() |
| original = args.scene.resolve() |
| c = json.loads((original / 'render/scene.json').read_text()) |
| args.output_dir.mkdir(parents=True, exist_ok=True) |
| blocked = [original.parent, *[p.resolve() for p in args.deny_root]] |
| with tempfile.TemporaryDirectory(prefix='isolated_scene_', dir=args.output_dir) as tmp: |
| isolated = Path(tmp) |
| inputs = ['render/scene.json', *[c[k] for k in ('foreground', 'background', 'target_image')]] |
| for name in inputs: |
| src = (original / name).resolve() |
| assert src.is_relative_to(original) |
| dst = isolated / name |
| dst.parent.mkdir(parents=True, exist_ok=True) |
| try: |
| os.link(src, dst) |
| except OSError: |
| shutil.copy2(src, dst) |
|
|
| def reject_sources(event, values): |
| if event != 'open' or not isinstance(values[0], (str, bytes, os.PathLike)): |
| return |
| try: |
| path = Path(os.fsdecode(values[0])).resolve() |
| except (OSError, ValueError): |
| return |
| if any(path.is_relative_to(root) for root in blocked): |
| raise PermissionError(f'Portability test prohibited source read: {path}') |
| sys.addaudithook(reject_sources) |
| |
| from render_scene import render |
| from package_trajectories import write_json |
| result = render(isolated, args.output_dir / 'render', args.device, width=320, use_cache=False) |
| result.update(status='passed', isolated_inputs=inputs, denied_source_roots=list(map(str, blocked)), |
| input_count=len(inputs), original_assets_modified=False, |
| note='Python-level read audit plus minimal scene runtime test; external binary syscalls are not a security sandbox.') |
| write_json(args.output_dir / 'portability.json', result) |
| print(json.dumps(result), flush=True) |
|
|
|
|
| if __name__ == '__main__': |
| main() |
|
|
