What determines the value of

isCompatibilityMetadataVariantEnabled

in

kotlin-tooling-metadata.json

? I'm seeing it set to

true

in all of the dependencies that I use (e.g. coroutines), except for a library that I publish (e.g. portal), where it is

false

.

Oh I forgot to ask about that in the call earlier. The default for the related gradle parameter apparently changed in 1.6.20 but I'm not clear on whether it's still relevant or not

I added it into Kermit because somebody was having issues digesting the dependency: https://github.com/touchlab/Kermit/blob/e69d519009601789fea5bed85063848e82721499/gradle.properties#L47

isCompatibilityMetadataVariantEnabled will determine if a HMPP (1.6.20+) library will support non hmpp consumers for tooling. As explained in the last meeting: In hmpp, every source set gets compiled into a ‘metadata klib’ and then published. Those artifacts can only be read by projects also using hmpp! Pre-HMPP multiplatform uses a

.koltin_metadata

format, which is becoming obsolete! A library with this setting enabled will still support projects that did not enable (or explicitly disable HMPP!

Is there any harm in keeping it enabled in libraries that have already upgraded to 1.6.21? So that consumers of the library aren't forced to enable HMPP (for whatever reason).

Feel free to choose enabling this in your libraries! There should not be a lot of harm done, but I am more than happy that this legacy mode is fading out ☺️

If I have a project that has HMPP disabled, would

enableCompatibilityMetadataVariant

be needed so that project module dependencies work correctly?

No, iirc this property does not do anything when hmpp is disabled! For what reasons exactly did you have do disable hmpp on your end?

I don't have any use case, just curious about how it works 😅

There should not be a lot of harm done, but I am more than happy that this legacy mode is fading out

To clarify, it’s fading out because as people upgrade Kotlin to 1.6.20+ it goes away automatically? Also, is there zero harm, or like a bit of “harm” and what would that be?