"""Evaluate one PEP 508 marker inside PM's runtime: `_marker_eval.py MARKER ENV_JSON`.

Prints "1" or "0". Callers whose interpreter has no `packaging` (a historical
takeover running under an old venv) delegate here; the PM runtime owns it.
"""

import json
import sys

from packaging.markers import Marker

if __name__ == "__main__":
    print("1" if Marker(sys.argv[1]).evaluate(environment=json.loads(sys.argv[2])) else "0")