Add a CLI

[nono]

Description of the Change

The CLI can be used like this:

$ watcher path/to/watch

Alternate Designs

I've tried to do something simple, with no external dependencies. An alternative would be to copy chokidar-cli, with more options. But if we want to go in this direction, it'd better to do that outside of this repository, and in a new npm package.

Benefits

It should help for testing @atom/watcher and reporting issues.

Possible Drawbacks

It will be one more file in the npm package, and the script may have to be maintained in the future.

Applicable Issues

N/A

[smashwilson]

Our linter isn't happy with this. We're using standard.js for the JavaScript side of things, so you should be able to run npm run format:js and get most of the way there.

Once that's green i'm 💯 on merging this, this would be super handy!

[smashwilson]

Were you meaning to make this another user-controlled flag?

[nono]

No, I think that recursive is probably the wanted option here. Do you think I should use an option here?

[smashwilson]

Oh, one more thing - would you mind adding a section to the README about this as well?

[nono]

I've fixed the lint (I've used prettier instead of standard the first time), and I've added a paragraph in the README. I think it's ready to be merged if the CI is Okay.

[smashwilson]

🎉