from pathlib import Path
import re, xml.etree.ElementTree as ET
root = Path(__file__).resolve().parent
errors = []
for p in root.rglob("*.usda"):
    for ref in re.findall(r"@([^@]+)@", p.read_text()):
        if not ref.startswith(("http:", "https:", "omniverse:")) and not (p.parent / ref).exists():
            errors.append((str(p.relative_to(root)), ref))
for p in (root / "assets/libero_runtime").rglob("*.xml"):
    for element in ET.parse(p).iter():
        ref = element.get("file")
        if ref and not (p.parent / ref).is_file(): errors.append((str(p.relative_to(root)), ref))
if errors:
    raise SystemExit("Missing dependencies: " + repr(errors[:20]))
print("PASS: all local USDA/XML file references exist")