xsel wrapper of xclip for [pass](https://www.passwordstore.org)

xclip

#!/usr/bin/env python3

import os
import sys


def as_xsel_args():
    """only supports xclip options that are used by pass

    * xclip -selection "$X_SELECTION"
    * xclip -o -selection "$X_SELECTION"
    """
    argv = sys.argv

    def pop_first():
        try:
            return argv.pop(0)
        except IndexError:
            raise SystemExit("expects more args")

    bin = pop_first()
    if not bin.endswith("xclip"):
        raise SystemExit("unexpected bin")

    while argv:
        arg = pop_first()
        if arg == "-o":
            yield "--output"
            continue

        if arg == "-selection":
            sel = pop_first()
            if sel == "clipboard":
                yield "--clipboard"
                continue
            raise SystemExit("unknown selection")

        raise SystemExit("unknown option")


def main():
    os.execvp("xsel", list(as_xsel_args()))


if __name__ == "__main__":
    main()