Store result to file for external tool consumption

[codinronan]

Description

I love this! Have wanted something to do this for awhile but never had the time..

What do you think about spitting out the results to a JSON file alongside the build, configurable via the nextConfig? The idea being for an external tool to be able to read this and track the size changes over time; also for things like tests to constrain changes in size across builds.

It wouldn't be hard to do - thoughts?

[lucleray]

I think it's a good idea 🙂

How would you track the size changes ? I'd like to understand the use case more clearly before adding the feature.

[SilentImp]

Same request.
For example, for GitLab we may store value in the report artefact and then in PR you will see how exactly size has changed.

Example:
https://gitlab.com/silentimp/metrics-test/merge_requests/3

I mean this: