IssueTracker

From Issue 219002669#comment4:

Another use case that we have is to reactively respond to the creation of APKs and AABs. The new AGP APIs allow us to connect out tasks into the artifact pipeline via wiredWith but the best we can come up with to receive the completed artifact is to wire in toTransform. This A) does not guarantee that we will receive the final artifact as more transforms may be applied after our task is called, and B) requires us to copy the input property file/dir to our tasks output property file/dir in order to not break the build cache.

The reactive behavior of the above is the complicating factor.

A non-reactive approach could simply depend upon the task name and then look for a hardcoded path in the build directory (which is still sort of gross, since the build output paths are not documented as public API and change from time to time).

Another approach would be to wire a custom task to consume the output of the build via the built artifacts loader feeding an input property. However, this approach cannot be applied reactively. Either the custom task is included in the build and causes the creation of the binary artifact, or it is not included in the build and never gets invoked.

We could look at implementing a different kind of get() that also registers the task as finalizedBy.

The API could look like this:

onVariant { variant -> 
  variant
    .artifacts
    .use(myTask)
    .wiredWith { myTask.flatMap { it.inputFile } }
    .toListenTo(SingleArtifacts.APK)
}

This would make the task both do a get() on the artifacts but also make it finalize the last producer/transform of the artifact.