Add withXXX methods for easy IORuntime configuration

[TimWSpence]

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[TimWSpence]

@armanbilge how about this? Also I don't know why CI didn't run...

[armanbilge]

In the long run I think IORuntimeConfig needs to no longer be a case class, because otherwise we are paying the cost of public copys and with methods.

[djspiewak]

Is this really better than just using copy though?

[armanbilge]

Yes, if we de-case-classify IORuntime. copy methods are worse for bincompat since they need to be overloaded.

[djspiewak]

Right but if we keep IORuntime as a case class, then this is kind of redundant, isn't it? Definitely get why copy is a pain for bincompat.

[armanbilge]

Right but if we keep IORuntime as a case class

Which is terrible for bincompat :) For example case classes generate mirrors on Scala 3 which we would have to be hand-maintained each time we change it.

Indeed, I suspect we've already broken it and our over-aggressive filters are just not telling us.

[armanbilge]

Hmm, I take that back. I guess the mirrors can evolve bincompatibly without intervention (edit: although they may throw runtime errors 🤔 ). Also I am concerned about the unapply methods, but either those are fine or are slipping through due to type erasure. In any case, we don't have any filters for IORuntimeConfig /shrug

[TimWSpence]

Sorry to only just get to this. Where did we land with this? Shall I just close it?

[djspiewak]

Okay coming back to this… (finally)

I think let's close this for now. If we un-case-class-ify IORuntimeConfig, we'll revive this approach.