#!/usr/bin/env python3

# Copyright Advanced Micro Devices, Inc., or its affiliates.
# SPDX-License-Identifier: MIT

"""
Sorts a list of paths by directory and then by filename. Useful for sorting the
file paths in CMake files.
"""

import collections
import os.path
import sys

if __name__ == "__main__":
    for arg in sys.argv[1:]:
        if "help" in arg or "-h in arg":
            print(__doc__)
            exit()

    dirs = collections.defaultdict(list)

    for line in sorted(sys.stdin):
        if line.strip() != "":
            path, name = os.path.split(line)
            dirs[path].append(name)

    first = True
    for path in sorted(dirs.keys()):
        if not first:
            print()

        for name in sorted(set(dirs[path])):
            print(os.path.join(path, name), end="")

        first = False