#!/usr/bin/python
# SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later

# Example printing the last author of a specified file

import sys
import time

from dulwich.repo import Repo

if len(sys.argv) < 2:
    print(f"usage: {sys.argv[0]} filename")
    sys.exit(1)

r = Repo(".")

path = sys.argv[1].encode("utf-8")

w = r.get_walker(paths=[path], max_entries=1)
try:
    c = next(iter(w)).commit
except StopIteration:
    print(f"No file {sys.argv[1]} anywhere in history.")
else:
    print(
        f"{sys.argv[1]} was last changed by {c.author} at {time.ctime(c.author_time)} (commit {c.id})"
    )