Add support for "xargs -n1" hooks?

Some hooks are only written to run against a single file at a time. An example is stylefmt.

You can hack around it with a wrapper script, but it’s nice to avoid those when possible. The pre-commit xargs implementation already would make it easy to partition into groups of one file.

How do you feel instead about adding a hook parameter like max_files_per_exec (questionable name)? Zero or default could keep the current behavior, and you could set to 1 to get the behavior we want here.

cc @SBoudrias

P.S. here’s a crazy hack just for kicks:

-   repo: local
    hooks:
    -   id: test
        name: test
        language: system
        files: .*
        entry: /bin/bash
        args: ['-c', 'echo $@ | xargs -n1 stylefmt', 'garbage']

[asottile]

slight adjustment, to properly handle spaces you need:

    entry: bash -c 'for x in "$@"; do ... "$x"; done' --

[asottile]

please stop grave digging old issues to “rally the troops” – this is not going to be implemented