"""Controle hors Blender : integrite, chemins, PNG, recette et syntaxe Python. Aucune importation de bpy, aucun rendu et aucun acces reseau. Code de sortie 0 : controles reussis ; 1 : pack incomplet ou altere ; 2 : usage. """ from pathlib import Path, PurePosixPath import argparse import ast import hashlib import json import struct import sys import zlib def safe_file(root, relative): if not isinstance(relative, str) or '\\' in relative or ':' in relative: raise ValueError('Chemin non portable') path = PurePosixPath(relative) if path.is_absolute() or '..' in path.parts or not path.parts: raise ValueError('Chemin hors du dossier') result = root.joinpath(*path.parts).resolve() if not result.is_relative_to(root.resolve()): raise ValueError('Dependance hors du dossier') return result def read_png(path): data = path.read_bytes() if data[:8] != b'\x89PNG\r\n\x1a\n': raise ValueError('Signature PNG invalide') pos, pixels, dimensions, ended = 8, bytearray(), None, False while pos + 12 <= len(data): length = struct.unpack('>I', data[pos:pos + 4])[0] kind, payload = data[pos + 4:pos + 8], data[pos + 8:pos + 8 + length] end = pos + length + 12 if end > len(data): raise ValueError('PNG tronque') crc = struct.unpack('>I', data[end - 4:end])[0] if zlib.crc32(kind + payload) & 0xffffffff != crc: raise ValueError('CRC PNG incorrect') if kind == b'IHDR': width, height, depth, color, compression, filtering, interlace = struct.unpack('>IIBBBBB', payload) if (depth, color, compression, filtering, interlace) != (8, 2, 0, 0, 0): raise ValueError('Format PNG inattendu pour le motif fourni') dimensions = [width, height] elif kind == b'IDAT': pixels.extend(payload) elif kind == b'IEND': ended = True if end != len(data): raise ValueError('Donnees apres IEND') break pos = end if not dimensions or not ended: raise ValueError('PNG incomplet') width, height = dimensions if width > 4096 or height > 4096 or width < 1 or height < 1: raise ValueError('Dimensions hors perimetre') raw = zlib.decompress(pixels) if len(raw) != height * (1 + width * 3): raise ValueError('Taille des pixels incorrecte') if any(raw[y * (1 + width * 3)] != 0 for y in range(height)): raise ValueError('Filtre PNG inattendu pour le motif fourni') return dimensions def validate(root): root = Path(root).resolve() errors, checks = [], [] try: manifest = json.loads((root / 'manifest.sha256.json').read_text(encoding='utf-8')) if manifest['algorithm'] != 'SHA-256' or not isinstance(manifest['files'], list): raise ValueError('Schema du manifeste incorrect') seen = set() for entry in manifest['files']: name = entry['path'] if name in seen: raise ValueError('Entree dupliquee dans le manifeste') seen.add(name) path = safe_file(root, name) if not path.is_file(): errors.append('Fichier absent : ' + name) else: data = path.read_bytes() if len(data) != entry['bytes'] or hashlib.sha256(data).hexdigest() != entry['sha256']: errors.append('Integrite incorrecte : ' + name) mandatory = {'scene.json', 'generate_scene.py', 'inspect_scene.py', 'validate_pack.py', '01_sources/make_texture.py', '03_ressources/pli-chevron.png', 'README.md', 'LICENSE.txt', 'VALIDATION.md'} if not mandatory.issubset(seen): errors.append('Le manifeste omet un fichier indispensable') checks.append({'name': 'inventaire_sha256', 'files': len(seen)}) except (OSError, ValueError, KeyError, TypeError) as error: errors.append('Manifeste illisible ou invalide : ' + str(error)) try: scene = json.loads((root / 'scene.json').read_text(encoding='utf-8')) if scene.get('schema') != 'prismora.blender-transfer.v1' or scene.get('engine') != 'CYCLES' or scene.get('device') != 'CPU': raise ValueError('Moteur ou schema inattendu') if scene.get('blenderTarget') != '4.5.x LTS' or scene.get('frame') != 1 or scene.get('animation') is not False: raise ValueError('Version ou perimetre inattendu') if scene.get('caches') != [] or scene.get('fonts') != [] or scene.get('linkedLibraries') != []: raise ValueError('Ce pack ne definit aucune police, bibliotheque liee ni simulation') for size in (scene['resolution'], scene['preview']['resolution']): if len(size) != 2 or any(type(n) is not int or not 1 <= n <= 4096 for n in size): raise ValueError('Dimensions invalides') if any(type(n) is not int or not 1 <= n <= 1024 for n in [scene['samples'], scene['preview']['samples']]): raise ValueError('Echantillonnage invalide') if not isinstance(scene['seed'], int) or len(scene['expectedObjects']) != len(set(scene['expectedObjects'])): raise ValueError('Graine ou noms invalides') assets = scene['assets'] if len(assets) != 1 or assets[0]['id'] != 'pli-label': raise ValueError('Inventaire de texture inattendu') for asset in assets: path = safe_file(root, asset['path']) if not path.is_file(): errors.append('Dependance absente : ' + asset['path']) elif read_png(path) != asset['size']: errors.append('Dimensions de texture incorrectes : ' + asset['path']) if asset['colorSpace'] != 'sRGB' or asset['pack'] is not True: errors.append('Traitement de texture inattendu') for relative in scene['outputs'].values(): safe_file(root, relative) checks.append({'name': 'recette_et_dependances', 'assets': len(assets), 'frame': 1}) except (OSError, ValueError, KeyError, TypeError, struct.error, zlib.error) as error: errors.append('Recette ou image invalide : ' + str(error)) for relative in ('generate_scene.py', 'inspect_scene.py', 'validate_pack.py', '01_sources/make_texture.py'): try: ast.parse((root / relative).read_text(encoding='utf-8'), filename=relative) except (OSError, SyntaxError, ValueError) as error: errors.append('Syntaxe Python : ' + relative + ' : ' + str(error)) checks.append({'name': 'syntaxe_python', 'files': 4}) return {'ok': not errors, 'scope': 'structure et integrite uniquement ; Blender non execute', 'checks': checks, 'errors': errors} def main(): parser = argparse.ArgumentParser(description=__doc__) parser.add_argument('--root', type=Path, default=Path(__file__).resolve().parent) parser.add_argument('--json', action='store_true') args = parser.parse_args() result = validate(args.root) if args.json: print(json.dumps(result, ensure_ascii=False, indent=2)) else: print('CONTROLE STRUCTUREL REUSSI' if result['ok'] else 'CONTROLE STRUCTUREL EN ECHEC') for error in result['errors']: print('- ' + error) print(result['scope']) return 0 if result['ok'] else 1 if __name__ == '__main__': sys.exit(main())