IssueTracker

Some movements happening on KAPT with regards to this: https://github.com/JetBrains/kotlin/pull/2179

Yes, kapt incremental compilation support is available since 1.3.40-dev-795
Is there already some plan to add support to Room?

#3 incremental kapt is available in 1.3.30 released yesterday too.

Is there already some ETA?

We are working on it and aiming for Room 2.2

Project: platform/frameworks/support
Branch: androidx-master-dev

commit e4fbb7fb77a4789ab40bff03cc131479779d3e69
Author: Daniel Santiago Rivera <danysantiago@google.com>
Date:   Tue Apr 09 23:20:59 2019

    Create integration test for Room that uses gradle test kit.
   
    Useful for testing Room incremental annotation processing in Gradle.
   
    Also consolidated some of the path definitions in various build.gradle
    into methods in buildSrc/SupportConfig.
   
    Bug: 112110217
    Test: ./gradlew room:integration-tests:room-i-a-p:test
    Change-Id: I34f6772675712c6edd500e9149ab7f21ade4f012

M       buildSrc/src/main/kotlin/androidx/build/SupportConfig.kt
M       lifecycle/integration-tests/incrementality/build.gradle
M       navigation/safe-args-gradle-plugin/build.gradle
A       room/integration-tests/incremental-annotation-processing/build.gradle
A       room/integration-tests/incremental-annotation-processing/src/test/data/simple-project/src/main/AndroidManifest.xml
A       room/integration-tests/incremental-annotation-processing/src/test/data/simple-project/src/main/java/room/testapp/TestDao.java
A       room/integration-tests/incremental-annotation-processing/src/test/data/simple-project/src/main/java/room/testapp/TestDatabase.java
A       room/integration-tests/incremental-annotation-processing/src/test/data/simple-project/src/main/java/room/testapp/TestEntity.java
A       room/integration-tests/incremental-annotation-processing/src/test/kotlin/androidx/room/gradle/CompileTest.kt
M       settings.gradle

https://android-review.googlesource.com/941741
https://goto.google.com/android-sha1/e4fbb7fb77a4789ab40bff03cc131479779d3e69

Project: platform/frameworks/support
Branch: androidx-master-dev

commit a68222dc929ae5e2a3445f9df69a63636854852e
Author: Hung Nguyen <hungnv@google.com>
Date:   Fri Mar 29 11:39:50 2019

    Prepare Room for incremental annotation processing.
   
    In Java projects, with non-incremental annotation processing, the inputs
    to an annotation processor includes only Java source files.
   
    With incremental annotation processing, however, the inputs may include
    both Java source files and class files (to avoid recompiling source
    files that haven't changed).
   
    Therefore, all Room annotations need to have retention policy CLASS or
    RUNTIME (not SOURCE), so that Room can find the elements annotated with
    those annotations from class files. This requirement is also stated at
    https://docs.gradle.org/current/userguide/java_plugin.html#sec:incremental_annotation_processing.
   
    Bug: 112110217
    Test: Existing tests + New AnnotationRetentionPolicyTest
    Change-Id: I1e3a433bf69503ef15cfc2e53cbe97616a6f13b8

M       room/common/api/2.2.0-alpha01.txt
M       room/common/api/current.txt
M       room/common/build.gradle
M       room/common/src/main/java/androidx/room/ColumnInfo.java
M       room/common/src/main/java/androidx/room/ForeignKey.java
M       room/common/src/main/java/androidx/room/OnConflictStrategy.java
M       room/common/src/main/java/androidx/room/Update.java
A       room/common/src/test/java/androidx/room/AnnotationRetentionPolicyTest.kt

https://android-review.googlesource.com/958284
https://goto.google.com/android-sha1/a68222dc929ae5e2a3445f9df69a63636854852e