#51: Provide a gradle plugin

build.gradle.kts

@@ -4,6 +4,7 @@
 plugins {
     java
     `maven-publish`
+    `java-gradle-plugin`
     id("com.diffplug.spotless") version "6.12.0"
     id("org.jetbrains.kotlin.jvm") version "1.8.10"
     id("org.jlleitschuh.gradle.ktlint") version "11.2.0"
@@ -25,6 +26,8 @@ dependencies {
     compileOnly("org.apache.maven.plugin-tools:maven-plugin-annotations:3.7.1")
     implementation("org.freemarker:freemarker:2.3.32")
     dokkaHtmlPlugin("org.jetbrains.dokka:kotlin-as-java-plugin:1.7.20")
+    testImplementation("org.junit.jupiter:junit-jupiter-api:5.9.2")
+    testImplementation("org.junit.jupiter:junit-jupiter-engine:5.9.2")
 }
 
 publishing {
@@ -58,3 +61,12 @@ configure<com.diffplug.gradle.spotless.SpotlessExtension> {
         ktlint()
     }
 }
+
+gradlePlugin {
+    plugins {
+        create("CamundaBpmnDocumentationGenerator") {
+            id = "info.novatec.cbdg"
+            implementationClass = "info.novatec.cbdg.plugin.CamundaBpmnDocumentationGenerator"
+        }
+    }
+}

src/main/kotlin/info/novatec/cbdg/plugin/CamundaBpmnDocumentationGenerator.kt

@@ -0,0 +1,23 @@
+package info.novatec.cbdg.plugin
+
+import org.gradle.api.Plugin
+import org.gradle.api.Project
+import org.gradle.api.provider.Property
+
+interface CamundaBpmnDocumentationGeneratorConfiguration {
+    val message: Property<String>
+}
+
+class CamundaBpmnDocumentationGenerator : Plugin<Project> {
+
+    override fun apply(project: Project) {
+        // Add the 'greeting' extension object
+        val configuration = project.extensions.create("bu", CamundaBpmnDocumentationGeneratorConfiguration::class.java)
+        configuration.message.convention("Bu Ga Ga!")
+        // Add a task that uses configuration from the extension object
+
+        project.task("generate").doLast {
+            println(configuration.message.get())
+        }
+    }
+}

src/test/kotlin/info/novatec/cbdg/plugin/CamundaBpmnDocumentationGeneratorTest.kt

@@ -0,0 +1,20 @@
+package info.novatec.cbdg.plugin
+
+import org.gradle.api.Project
+import org.gradle.testfixtures.ProjectBuilder
+import org.junit.jupiter.api.Assertions.assertNotNull
+import org.junit.jupiter.api.Assertions.assertTrue
+import org.junit.jupiter.api.Test
+
+class CamundaBpmnDocumentationGeneratorTest {
+
+    @Test
+    fun greetingTest() {
+        val project: Project = ProjectBuilder.builder().build()
+
+        project.getPluginManager().apply("info.novatec.cbdg")
+
+        assertTrue(project.getPluginManager().hasPlugin("info.novatec.cbdg"))
+        assertNotNull(project.getTasks().getByName("generate"))
+    }
+}