检查kapt是否使用增量注释处理

Question

在静态编程语言1.3.30中，添加了对增量注释处理的支持：https://blog.jetbrains.com/kotlin/2019/04/kotlin-1-3-30-released/根据文档：

请注意，在当前实现中，使用任何非增量注释处理器或依赖项的 ABI 更改（到目前为止，包括修改内部声明）将导致给定模块的非增量注释处理。

我有一个带有多个注释处理器的多模块项目。只有一部分是增量的。至少就我所知，有些模块只使用增量注释处理器。

我的问题是：有没有办法检查是否发生了增量注释处理？例如。Gradle中是否有任何特定的控制台日志表明这一点？我想确认确实使用了增量注释处理。

Answer 1

我能够通过添加

kapt.verbose=true

在根项目中的gradle.properties中。这会导致在控制台中打印以下内容，例如更改公共方法时：

Javac options: {}
[incremental apt] Changed files: [/Users/me/workspace/my-project/core/common/build/tmp/kapt3/stubs/foo/bar/ChangedClassName.java]
...
[INFO] Need to discovery annotation processors in the AP classpath
[INFO] Annotation processors: toothpick.compiler.factory.FactoryProcessor, toothpick.compiler.memberinjector.MemberInjectorProcessor
[INFO] Processing java sources with annotation processors: /Users/me/workspace/my-project/core/common/build/tmp/kapt3/stubs/foo/bar/ChangedClassName.java
[INFO] Annotation processing complete, errors: 0, warnings: 0
[INFO] Annotation processor stats:
[INFO] IncrementalProcessor: total: 61 ms, init: 1 ms, 3 round(s): 59 ms, 0 ms, 1 ms
[INFO] IncrementalProcessor: total: 1 ms, init: 1 ms, 3 round(s): 0 ms, 0 ms, 0 ms

这是使用增量注释处理的时候。进行干净构建时，将打印:

Javac options: {}
[incremental apt] Changed files: []
...
[INFO] Need to discovery annotation processors in the AP classpath
[INFO] Annotation processors: toothpick.compiler.factory.FactoryProcessor, toothpick.compiler.memberinjector.MemberInjectorProcessor
[INFO] Processing java sources with annotation processors: [ALL THE  FILES IN THE MODULE ARE LISTED HERE]
[INFO] Annotation processing complete, errors: 0, warnings: 0
[INFO] Annotation processor stats:
[INFO] IncrementalProcessor: total: 124 ms, init: 1 ms, 3 round(s): 122 ms, 1 ms, 0 ms
[INFO] IncrementalProcessor: total: 1 ms, init: 0 ms, 3 round(s): 1 ms, 0 ms, 0 ms

牙签是我正在使用的阿迪框架，它从2.x开始支持增量注释处理。

如果有一个不是增量的注释处理器，它也会打印，例如：

[INFO] Incremental KAPT support is disabled. Processors that are not incremental: butterknife.compiler.ButterKnifeProcessor.