Add Convention Plugins for Kotlin

Author: jjohannes

app/build.gradle.kts

@@ -11,16 +11,17 @@ dependencies {
     implementation(projects.tatooine)
     implementation(libs.guice)
     implementation(libs.guice.servlet)
+    implementation(libs.kotlin.stdlib)
     implementation(libs.slf4j.api)
     runtimeOnly(libs.slf4j.simple)
     providedCompile(libs.jakarta.servlet.api)
 
+    mockApiApi(libs.guava)
     mockApiImplementation(projects.app)
-    mockApiImplementation(libs.guava)
 
     testImplementation(libs.junit.jupiter.api)
 
+    testEndToEndApi(libs.junit.jupiter.api)
     testEndToEndImplementation(projects.app) { capabilities { requireFeature("mock-api") } }
     testEndToEndImplementation(libs.guava)
-    testEndToEndImplementation(libs.junit.jupiter.api)
 }

bespin/build.gradle.kts

@@ -2,6 +2,7 @@ plugins { id("org.example.gradle.component.library") }
 
 dependencies {
     api(projects.corellia)
+    api(libs.kotlin.stdlib)
     implementation(projects.coruscant)
     implementation(libs.velocity.engine.core)
 

corellia/build.gradle.kts

@@ -4,6 +4,7 @@ plugins {
 }
 
 dependencies {
+    api(libs.kotlin.stdlib)
     api(libs.poi)
     implementation(libs.commons.io)
     implementation(libs.poi.ooxml)

coruscant/build.gradle.kts

@@ -8,6 +8,7 @@ dependencies {
     api(libs.jackson.annotations)
     api(libs.jackson.databind)
     api(libs.jakarta.inject.api)
+    api(libs.kotlin.stdlib)
     api(libs.opensaml)
     api(libs.org.json)
     implementation(libs.httpcomponents.fluent.hc)

gradle.properties

@@ -8,3 +8,6 @@ org.gradle.configuration-cache=true
 
 # activate Gradle build cache - switch between branches/commits without rebuilding every time
 org.gradle.caching=true
+
+# control Kotlin standard library dependencies (and their scope) ourselves
+kotlin.stdlib.default.dependency=false

gradle/libs.versions.toml

@@ -39,6 +39,8 @@ jakarta-mail-impl = { module = "com.sun.mail:jakarta.mail", version.ref = "jakar
 jakarta-servlet-api = { module = "jakarta.servlet:jakarta.servlet-api", version.ref = "jakarta-servlet" }
 jsr305 = { module = "com.google.code.findbugs:jsr305", version.ref = "jsr305" }
 junit-jupiter-api = { module = "org.junit.jupiter:junit-jupiter-api", version.ref = "junit5" }
+kotlin-stdlib = { module = "org.jetbrains.kotlin:kotlin-stdlib" }
+kotlin-test = { module = "org.jetbrains.kotlin:kotlin-test" }
 opensaml = { module = "org.opensaml:opensaml", version.ref = "opensaml" }
 org-json = { module = "org.json:json", version.ref = "org-json" }
 org-reflections = { module = "org.reflections:reflections", version.ref = "org-reflections" }

gradle/plugins/build.gradle.kts

@@ -9,6 +9,7 @@ dependencies {
     implementation("io.fuchs.gradle.classpath-collision-detector:classpath-collision-detector:1.0.0")
     implementation("org.cyclonedx:cyclonedx-gradle-plugin:2.3.1")
     implementation("org.gradlex:jvm-dependency-conflict-resolution:2.4")
+    implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.20")
 }
 
 testing.suites.named<JvmTestSuite>("test") {

gradle/plugins/src/main/kotlin/org.example.gradle.base.identity.gradle.kts

@@ -2,7 +2,7 @@ plugins { id("org.gradle.base") }
 
 // Set the group required to refer to a Module "from outside".
 // I.e., when it is published or used in Included Builds.
-group = "org.example.product.java"
+group = "org.example.product.kotlin"
 
 // Set the version from 'version.txt'
 version = providers.fileContents(isolated.rootProject.projectDirectory.file("gradle/version.txt")).asText.getOrElse("")

gradle/plugins/src/main/kotlin/org.example.gradle.check.format-kotlin.gradle.kts

@@ -0,0 +1,6 @@
+plugins {
+    id("com.diffplug.spotless")
+    id("org.example.gradle.base.lifecycle")
+}
+
+spotless { kotlin { ktfmt().kotlinlangStyle() } }

gradle/plugins/src/main/kotlin/org.example.gradle.component.application.gradle.kts

@@ -6,8 +6,10 @@ plugins {
     id("org.example.gradle.check.dependencies")
     id("org.example.gradle.check.format-gradle")
     id("org.example.gradle.check.format-java")
+    id("org.example.gradle.check.format-kotlin")
     id("org.example.gradle.feature.checksum")
     id("org.example.gradle.feature.compile-java")
+    id("org.example.gradle.feature.compile-kotlin")
     id("org.example.gradle.feature.javadoc")
     id("org.example.gradle.feature.test")
     id("org.example.gradle.feature.test-end-to-end")