XO + Prettier + JSON / YAML

[sekhavati]

Is there a way to configure XO so that it also passes file types like JSON and YAML through Prettier when its formatting files?

In my setup which has prettier: true it seems to only format TS/JS files, which is half expected I guess given its a ESLint wrapper.

I've tried adding extensions: ["json"] but then other linter errors pop up, presumable because JSON is then being fed into eslint plugins that were expecting JS/TS.

To clarify, I only want to format these file types with Prettier, I don't need to lint them.

I have read through the issue below and noted its similarity but the answers seem to focus on linting (not formatting). Maybe I've missed the point?

#676

I guess I could dip into ./node_modules/xo/node_modules/prettier and execute what I need, but I'm hoping there's a better way I've missed. Also adding Prettier explicitly would then need a bit of thought to ensure the version in the project stayed in sync with XO's.