ext in buildscript can not be recognised by Gradle Kotlin DSL

Question

In these days, I am trying to write some codes to experience the Spring reactive features and kotlin extension in Spring 5, and I also prepared a gradle Kotlin DSL build.gradle

Answer 1

It is possible to use constants defined in .kt file in .gradle.kts files.

create buildSrc folder in root folder of your project

create buildSrc/build.gradle.kts file with the following content

plugins {
    `kotlin-dsl`
}

repositories {
    mavenCentral()
}

create file buildSrc/src/main/kotlin/Constants.kt with the following content

object Constants {
    const val kotlinVersion = "1.3.70"
    const val targetSdkVersion = 28
}

Synchronize. Now you may reference created constants in various .gradle.kts files like this

...
classpath(kotlin("gradle-plugin", version = Constants.kotlinVersion))
...

...
targetSdkVersion(Constants.targetSdkVersion)
...