如何为 buildSrc 和应用程序模块定义 Kotlin 版本？

Question

我在多模块 Kotlin 项目中使用 buildSrc 模块 manage dependency definitions and versions. The module makes use of kotlin-dsl 如 build.gradle.kts 所示：

plugins {
    `kotlin-dsl`
}

替代声明：

plugins {
    id("org.gradle.kotlin.kotlin-dsl") version "0.16.2"
}

我想使用相同的 Kotlin 版本来编译 buildSrc 模块以及在应用程序 module/s 中。我的第一次尝试是简单地添加 JVM 工件：

plugins {
    `kotlin-dsl`
    kotlin("jvm") version "1.2.31"
}

然而，这会导致构建错误，讨论 here:

Error resolving plugin [id: 'org.jetbrains.kotlin.jvm', version: '1.2.31']
Plugin request for plugin already on the classpath must not include a version

什么是只定义一次整个项目使用的 Kotlin 版本的便捷方法？

相关

• Kotlin versions and the Gradle Kotlin DSL
• Sample project: Multi-kotlin-project-with-buildSrc

Answer 1

我知道的唯一方法是将它放入 gradle.properties（或任何其他配置）并在 settings.gradle.kts pluginManagement 中读取它。像这样：

pluginManagement {
    repositories {
        gradlePluginPortal()
    }
    resolutionStrategy {
        eachPlugin {
            if (requested.id.id.startsWith("org.jetbrains.kotlin")) {
                useVersion(gradle.rootProject.extra["kotlin.version"] as String)
            }
        }
    }
}

Answer 2

错误不言而喻：如果您已经在 buildscript 块中指定了插件版本，则无法在 plugins 文件夹中指定它。

您可以将 kotlinVersion 放入 gradle.properties 并将 buildSrc/gradle.propeties 符号链接到 ./gradle.properties

Answer 3

Each Gradle release is meant to be used with a specific version of the kotlin-dsl plugin and compatibility between arbitrary Gradle releases and kotlin-dsl plugin versions is not guaranteed.

Using an unexpected version of the kotlin-dsl plugin in a build can cause hard to diagnose problems.

Starting with Gradle 5.4, a warning is emitted whenever an unexpected version of the kotlin-dsl plugin is detected.

Paul Merlin @eskatos, 25.04.2019

因此，我删除了 version:

plugins {
    `kotlin-dsl`
}

repositories {
    mavenCentral()
}