Copy selection as un-indented code block (for Slack, Telegram, etc)

codify.py

#!/usr/bin/env python3
"""
Turn input into something that's easy to paste to telegram/slack/other channels
as a code block

Usage:
    $ cat foo | codify.py | xclip -selection clipboard

Vim shortcut to copy visual selection on <leader>c (add to .vimrc):
    vmap <leader>c :w !cat \| codify.py \| xclip -selection clipboard<cr>
"""
import sys
from textwrap import dedent


def main():
    s = sys.stdin.read()
    s = dedent(s)
    print(f'```\n{s}```')


if __name__ == "__main__":
    main()