android中gradle的kotlin编译配置选项

一、编译配置

1、Android中的配置

使用如下方式开启在Android中的gradle的kotlin编译配置：

该配置在其余平台不可用

android {
   ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_17
        targetCompatibility JavaVersion.VERSION_17
    }
    kotlinOptions {
        jvmTarget = '1.8'
//        freeCompilerArgs.add("-Xexport-kdoc")
        setFreeCompilerArgs(["-Xcontext-receivers"])
//setFreeCompilerArgs(["-Xexport-kdoc","-Xcontext-receivers","-opt-in=org.mylibrary.OptInAnnotation"])
    }
    //如下方式会报错
    //tasks.withType(KotlinCompile::class).all {
//    kotlinOptions.freeCompilerArgs = listOf("-Xcontext-receivers")
//}

...

}

以上配置会开启Kotlin/JVM 的上下文接收者原型功能，否则该功能不可用，开启后编码可以使用以下代码：

interface LoggingContext {
    val log: Logger // This context provides a reference to a logger 
}

context(LoggingContext)
fun startBusinessOperation() {
    // You can access the log property since LoggingContext is an implicit receiver
    log.info("Operation has started")
}

fun test(loggingContext: LoggingContext) {
    with(loggingContext) {
        // You need to have LoggingContext in a scope as an implicit receiver
        // to call startBusinessOperation()
        startBusinessOperation()
    }
}

传递参数的发过誓可以直接在里面写setFreeCompilerArgs(["-opt-in=org.mylibrary.OptInAnnotation"])

2、其余平台的配置

除了上述配置还可以使用以下配置，该配置可以在其余平台使用:

android {
}
tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8

    kotlinOptions {
        jvmTarget = '1.8'
        apiVersion = '1.1'
        languageVersion = '1.1'
    }
}

二、参考链接：

1. Kotlin 1.6.20 的新特性
2. Kotlin Gradle plugin 中的编译器选项
3. IDE highlighting: False positive error "Context receivers should be enabled explicitly"
4. compileKotlin block in build.gradle file throws error "Could not find method compileKotlin() for arguments [...]"