Source code for pycif.plugins.models.dalecbethy.io.inputs.utils

import glob
import os




def find_unique_match(directory, pattern):
    """Find the single file matching ``pattern`` in ``directory``.

    Args:
        directory (str): directory to search in.
        pattern (str): a ``glob`` pattern.

    Returns:
        str: the single matching file path.

    Raises:
        FileNotFoundError: if zero, or more than one, file matches.
    """
    matches = sorted(glob.glob(os.path.join(directory, pattern)))
    if len(matches) != 1:
        raise FileNotFoundError(
            f"Expected exactly one file matching {pattern!r} in "
            f"{directory!r}, found {matches}"
        )
    return matches[0]