advanced/link-f.py

The file advanced/link-f.py is a Python script that creates hard links, forcefully overwriting the destination if it exists.

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#!/usr/bin/env python3

# Creates a link to SRC with the name DST, overwriting DST if it exists.
# This is similar to the following GNU coreutils command: ln -f SRC DST

import os
import sys
from tempfile import TemporaryDirectory

def main():
    if len(sys.argv) != 3:
        print("Usage: ", sys.argv[0], "SRC DST", file=sys.stderr)
        return
    dst = sys.argv[2]
    with TemporaryDirectory(dir=os.path.dirname(dst)) as tmpdir:
        tmp = os.path.join(tmpdir, os.path.basename(dst))
        os.link(sys.argv[1], tmp)
        os.replace(tmp, dst)

if __name__ == '__main__':
    main()