feat: jsonc support

[stevenh]

Add support for identifying jsonc files by extension.

[asottile]

afaik this isn't a standardized format or extension (does it include commas? does it include single quotes?) so we can't accept an extension for it

[stevenh]

JSONC is a superset of JSON which supports comments, it's commonly used by tools like Visual Studio Code.

You can some more details here:

• https://github.com/JSONC-Spec/JSONC-Spec
• https://github.com/muhammadmuzzammil1998/jsonc

It's also supported by prettier, and I noticed the lack of support while doing a PR for schemastore you can see the comment here which currently prevents it from using prettier to check jsonc files as far as I can tell.

Hope this helps, do you need any more information?

[asottile]

the usage of the extension predates that "standard"

[stevenh]

Is there a way to implement it such that we can get it added?

[asottile]

you don't need identify support to use things in pre-commit -- you can always use files

[stevenh]

Thanks for the info, I'll take a look.