Add Kotlin support with automatic kapt configuration - #27
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- Detect Kotlin plugin (org.jetbrains.kotlin.jvm) in project - Automatically apply kapt plugin when Kotlin is detected - Add mapstruct-processor to kapt configuration instead of annotationProcessor - Update optional dependencies (Lombok, Spring) to use kapt when Kotlin is present - Add comprehensive tests for Kotlin support - Update README with Kotlin examples and detection mechanism - Add Kotlin Gradle Plugin 2.0.21 to test dependencies
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Summary
This PR adds automatic Kotlin support to the MapStruct Gradle plugin. When the Kotlin plugin is detected in the project, the plugin automatically applies kapt and configures mapstruct-processor in the kapt configuration instead of annotationProcessor.
Changes
Kotlin Support
Automatic detection and configuration:
kotlinextension (consistent with other framework detection)org.jetbrains.kotlin.kaptplugin when Kotlin is detectedmapstruct-processortokaptconfiguration instead ofannotationProcessorkaptwhen Kotlin is presentImplementation details:
addDependencies()method that handles both required and optional dependencieshasExtension("kotlin")for consistency with other frameworksaddDependency()overloads to reduce code duplicationhasPlugin()method in favor of extension-based detectionTesting
Added comprehensive test coverage:
addDependenciesWithKotlinPlugin- verifies kapt is applied and processor is in kapt configurationaddDependenciesWithKotlinPluginAndSpring- verifies Kotlin works correctly with other frameworksAll existing tests pass - no regressions introduced
Documentation
README.md updates:
Testing
All tests pass successfully:
Files Changed
DependencyManager.java- Added Kotlin detection, unified dependency addition logicMapstructPlugin.java- Simplified to singleaddDependencies()callDependencyTest.java- Added Kotlin test casesbuild.gradle- Added Kotlin Gradle Plugin to test dependencies, reordered pluginsREADME.md- Added Kotlin to "How it works" section