IssueTracker

Jetpack uses a lint check to prevent cross-group usage of the @RequiresOptIn annotation. The implementation is similar to @RestrictToDetector's enforcement of LIBRARY_GROUP, but our check fails provisional checks on alternating runs even though they seem to be reporting as expected.

We've logged some data to figure out what's going on when using ./gradlew :lint-checks:test --rerun-tasks.

For a failing run, we see:

androidx.build.lint.BanInappropriateExperimentalUsageTest > Test cross-module Experimental usage via Gradle model STANDARD_OUT
    GLOBAL: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    GLOBAL: report usage of sample.annotation.provider in androidx.sample.consumer
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    GLOBAL: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    GLOBAL: report usage of sample.annotation.provider in androidx.sample.consumer
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    ANALYSIS_ONLY: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    ANALYSIS_ONLY: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    ANALYSIS_ONLY: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    ANALYSIS_ONLY: report usage of sample.annotation.provider in androidx.sample.consumer

androidx.build.lint.BanInappropriateExperimentalUsageTest > Test cross-module Experimental usage via Gradle model FAILED
    org.junit.ComparisonFailure: Lint results computed provisionally do
    not match those computed without provisional support enabled.
    ...
    You can then check each output by passing in a `testType` parameter
    to `expect`(...). expected:<[UInjectionHost Enabled:

    ../consumer/src/main/kotlin/androidx/sample/consumer/OutsideGroupExperimentalAnnotatedClass.kt:25: Error: Experimental and RequiresOptIn APIs may only be used within the  same-version group where they were defined. [IllegalExperimentalApiUsage]
        @ExperimentalSampleAnnotationJava
        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    1 errors, 0 warnings
    ]> but was:<[Automatic Partial Analysis and Merging:

    No warnings.]>

The next run, however, passes:

androidx.build.lint.BanInappropriateExperimentalUsageTest > Test cross-module Experimental usage via Gradle model STANDARD_OUT
    GLOBAL: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    GLOBAL: report usage of sample.annotation.provider in androidx.sample.consumer
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    GLOBAL: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    GLOBAL: report usage of sample.annotation.provider in androidx.sample.consumer
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    GLOBAL: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    ANALYSIS_ONLY: declared sample.annotation.provider.ExperimentalSampleAnnotationJava in provider
    ANALYSIS_ONLY: declared sample.annotation.provider.ExperimentalSampleAnnotation in provider
    ANALYSIS_ONLY: used sample.annotation.provider.ExperimentalSampleAnnotationJava in consumer
    ANALYSIS_ONLY: report usage of sample.annotation.provider in androidx.sample.consumer

androidx.build.lint.BanInappropriateExperimentalUsageTest > Test cross-module Experimental usage via Gradle model PASSED

The next run fails, and so on.