在 Task 中使用 ClassTransformer
在平常的开发过程中,我们可能需要在 Task 中依赖 Android Transform Pipeline 的产出物,例如:booster-task-analyser在新窗口打开 就是在 AnalyserTask在新窗口打开 中对 Android Transform Pipeline 的产出物进行静态分析,针对这种应用场景,Booster 提供了一系列实用类和扩展方法:
通过 VariantProcessor 创建 Task
@AutoService(VariantProcessor::class)
class ScannerVariantProcessor : VariantProcessor {
override fun process(variant: BaseVariant) {
val project = variant.project
val variantName = variant.name.capitalize()
val transform = variant.extension.transforms.reversed().first {
it.scopes.containsAll(TransformManager.SCOPE_FULL_PROJECT)
&& it.inputTypes.contains(QualifiedContent.DefaultContentType.CLASSES)
} ?: throw GradleException("No available transform")
project.tasks.withType(TransformTask::class.java).find {
it.name.endsWith(variantName) && it.transform == transform
}?.let { transformTask ->
project.tasks.create("scan${variantName}", ScannerTask::class.java) {
it.variant = variant
it.supplier = {
transformTask.outputs.files.single()
}
}.dependsOn(transformTask)
}
}
}
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通过 VariantTransformHelper 复用 Transformer
open class ScannerTask : AbstractTask() {
lateinit var variant: BaseVariant
lateinit var supplier: () -> File
@get:Input
val variantName: String
get() = variant.name
@TaskAction
fun scan() {
VariantTransformHelper(variant, supplier())
.transform(project.projectDir, AsmTransformer(ScannerTransformer()))
}
}
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自定义 ClassTransformer
@AutoService(ClassTransformer::class)
class ScannerTransformer : ClassTransformer {
override fun transform(context: TransformContext, klass: ClassNode): ClassNode {
// scanning klass
klass
}
}
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