JacocoReport配置的Gradle 6.0弃用警告

Question

以下Gradle任务，它配置JacocoReportBase：

task jacocoRootReport(type: JacocoReport) {
    ...
    sourceDirectories = files(subprojects.sourceSets.main.allSource.srcDirs)
    additionalSourceDirs = files(subprojects.sourceSets.main.allSource.srcDirs)
    classDirectories = files(subprojects.sourceSets.main.output)
    executionData = files(subprojects.jacocoTestReport.executionData)
    ...
}

当使用./gradlew assembleDebug --warning-mode all构建时，

会产生这些警告：

The JacocoReportBase.setSourceDirectories(FileCollection) method has been deprecated.
This is scheduled to be removed in Gradle 6.0. Use getSourceDirectories().from(...)
at tasks_1p10s36ydq4k8rroeiucekewi$_run_closure6.doCall(.../tasks.gradle:152)

The JacocoReportBase.setAdditionalSourceDirs(FileCollection) method has been deprecated.
This is scheduled to be removed in Gradle 6.0. Use getAdditionalSourceDirs().from(...)
at tasks_1p10s36ydq4k8rroeiucekewi$_run_closure6.doCall(.../tasks.gradle:151)

The JacocoReportBase.setClassDirectories(FileCollection) method has been deprecated.
This is scheduled to be removed in Gradle 6.0. Use getClassDirectories().from(...)
at tasks_1p10s36ydq4k8rroeiucekewi$_run_closure6.doCall(.../tasks.gradle:153)

The JacocoReportBase.setExecutionData(FileCollection) method has been deprecated.
This is scheduled to be removed in Gradle 6.0. Use getExecutionData().from(...)
at tasks_1p10s36ydq4k8rroeiucekewi$_run_closure6.doCall(.../tasks.gradle:154)

如何使用与Gradle 6.0兼容的语法（如过时警告所建议）将期望的值与这些方法一起使用（按其名称，该值似乎是getter而不是setter）：

• getAdditionalSourceDirs().from(...)
• getSourceDirectories().from(...)
• getClassDirectories().from(...)
• getExecutionData().from(...)吗？

Answer 1

有一个设置器.from，其工作原理如下：

task jacocoRootReport(type: JacocoReport) {
    ...
    sourceDirectories.from = subprojects.sourceSets.main.allSource.srcDirs
    additionalSourceDirs.from = subprojects.sourceSets.main.allSource.srcDirs
    classDirectories.from = subprojects.sourceSets.main.output
    executionData.from = subprojects.jacocoTestReport.executionData
    ...
}