#!/usr/bin/env python3.8

# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import sys
import argparse
import shutil

from pathlib import Path


def main():
    params = argparse.ArgumentParser(
        description="Copy all files in a directory tree and touch a stamp file")
    params.add_argument("source", type=Path)
    params.add_argument("target", type=Path)
    params.add_argument("stamp", type=Path)
    params.add_argument("--ignore_pattern", action="append")
    args = params.parse_args()

    if args.target.is_file():
        args.target.unlink()
    if args.target.is_dir():
        shutil.rmtree(args.target, ignore_errors=True)

    ignore = None
    if args.ignore_pattern:
        ignore = shutil.ignore_patterns(*args.ignore_pattern)

    shutil.copytree(args.source, args.target, symlinks=True, ignore=ignore)

    stamp = Path(str(args.stamp))
    stamp.touch()


if __name__ == "__main__":
    sys.exit(main())