Recursively search for a file in a directory tree.

pathsearch.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Recursively search for a file in a directory tree.
"""
import argparse
from pathlib import Path

def iter_parents(path: Path, args):
    """Iterate parents."""
    p = path.parent
    while p != Path('/'):
        if p.joinpath(args.search_for).exists():
            yield p.joinpath(args.search_for)
            break
        p = p.parent
        yield from iter_parents(p, args)


def run(args):
    """Run."""
    args.path = args.path.expanduser()
    plist = list(iter_parents(args.path, args))
    if not plist:
        raise SystemExit("No matches found.")
    print(plist[0])


def main():
    """Run main function."""
    parser = argparse.ArgumentParser(
        formatter_class=argparse.RawDescriptionHelpFormatter,
        description=__doc__,
    )
    parser.add_argument(
        "path",
        help="Path to search",
        type=Path,
    )
    parser.add_argument(
        "search_for",
        help="File to search for",
        type=Path,
    )
    args = parser.parse_args()
    run(args)


if __name__ == "__main__":
    main()