feature request: Bring in some diff options: ignore-all-space, recursive, brief

[dtrts]

Hello team 👋

I stumbled across this project whilst building out a pipeline to compare to kubernetes manifests with each other. I was super happy to find something which understands yaml and also can match kubernetes objects!

As in my current pipeline I am just using the diff tool, I make use of a couple of features which I think would also be useful here. Below i'm referencing the command line options:

• ignore-all-space This ignores whitespace, also mentioned in this issue: Allow omitting whitespace only changes #222
• recursive When provided with two folders it will perform a diff on all files
• brief When running in recursive mode (or not i think) it will return only the file names which have a diff.

Whilst experimenting I ran dyff on a manifest which was adding / removing a large kubernetes CRD. The output then returned all 1000 lines of the CRD!
An enhancement I could see here is an option to only return the location and the type of change.
That would inform me that a document has been added/removed and the keys it matched on. Or for each document the keys which are seen in the diff.

Thank you for your time. I'm no go expert but hope that one day I can give this a go myself. If you think any of these are worth implementing and do so before me then even better.

Thank you!

[DLakin01]

+1 to the recursive option, it'd be great to use this tool to inspect entire directories of YAML files!