Use Gradle plugins { } instead of buildscript { } (#503)

Author: TWiStErRob

.github/workflows/ci.yml

@@ -67,9 +67,8 @@ jobs:
     - name: 3. Build with Kotlin ${{ matrix.kotlin }} and mock-maker ${{ matrix.mock-maker }}
       run: |
         ops/mockMakerInline.sh
-        ./gradlew build
+        ./gradlew build -PtestKotlinVersion=${{ matrix.kotlin }}
       env:
-        KOTLIN_VERSION: ${{ matrix.kotlin }}
         MOCK_MAKER: ${{ matrix.mock-maker }}
 
   #

README.md

@@ -58,8 +58,8 @@ keeping the base module at a recent version.
 
 Usually it is enough to test only using the default Kotlin versions; 
 CI will test against multiple versions.
-If you want to test using a different Kotlin version locally, set
-an environment variable `KOTLIN_VERSION` and run the tests.
+If you want to test using a different Kotlin version locally,
+add the `-PtestKotlinVersion=1.2.3` argument to the Gradle invocation while running the tests.
 
 ### Acknowledgements
 

build.gradle

@@ -1,23 +1,13 @@
-buildscript {
-    repositories {
-        mavenLocal()        // for local testing
-        maven { url "https://plugins.gradle.org/m2/" }
-    }
-    dependencies {
-        classpath "org.shipkit:shipkit-changelog:1.2.0"
-        classpath "org.shipkit:shipkit-auto-version:1.2.2"
-        classpath "io.github.gradle-nexus:publish-plugin:1.3.0"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.20"
-        classpath "org.jetbrains.dokka:dokka-gradle-plugin:1.9.10"
-    }
+plugins {
+    id "org.gradle.base"
+    id "org.shipkit.shipkit-changelog" version "1.2.0"
+    id "org.shipkit.shipkit-github-release" version "1.2.0"
+    id "org.shipkit.shipkit-auto-version" version "1.2.2"
+    id "io.github.gradle-nexus.publish-plugin" version "1.3.0"
+    id "org.jetbrains.kotlin.jvm" version "1.9.20" apply false
+    id "org.jetbrains.dokka" version "1.9.10" apply false
 }
 
-apply plugin: 'org.gradle.base'
-apply plugin: "io.github.gradle-nexus.publish-plugin"
-apply plugin: 'org.shipkit.shipkit-auto-version'
-apply plugin: "org.shipkit.shipkit-changelog"
-apply plugin: "org.shipkit.shipkit-github-release"
-
 def test = tasks.register("test") {
     dependsOn gradle.includedBuild("tests").task(":test")
 }

mockito-kotlin/build.gradle

@@ -1,9 +1,11 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
-apply plugin: 'kotlin'
+plugins {
+    id "org.jetbrains.kotlin.jvm"
+    id "org.jetbrains.dokka"
+}
 apply from: '../gradle/publishing.gradle'
-apply plugin: 'org.jetbrains.dokka'
 
 group = 'org.mockito.kotlin'
 

tests/build.gradle

@@ -1,19 +1,12 @@
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
-buildscript {
-    repositories {
-        mavenCentral()
-    }
-    dependencies {
-        def kotlin_version = System.getenv("KOTLIN_VERSION") ?: '1.9.20'
-        println "$project uses Kotlin $kotlin_version"
-        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
-    }
+plugins {
+    id "org.gradle.java"
+    id "org.jetbrains.kotlin.jvm" version "${testKotlinVersion}"
 }
 
-apply plugin: 'java'
-apply plugin: 'kotlin'
+logger.lifecycle "${project} uses Kotlin ${testKotlinVersion}"
 
 repositories {
     mavenCentral()

tests/gradle.properties

@@ -0,0 +1,3 @@
+# Default version for the :tests module for Kotlin StdLib / KGP.
+# See https://github.com/mockito/mockito-kotlin#testing for more.
+testKotlinVersion=1.9.20