swagger2markup conflicts with kotlin-gradle-plugin

[McDime]

swagger2markup-gradle-plugin conflicts with kotlin-gradle-plugin.

Unfortunately, I have no idea where the problem is and how to solve it. Any help is appreciated.

How to reproduce:

1. Take spring-swagger2markup-demo project (https://github.com/Swagger2Markup/spring-swagger2markup-demo)
2. Add a new classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.10" before the line 9 in the build.gradle (section buildscript / dependencies )

... 
}
    dependencies {
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:1.2.10"
        classpath 'org.asciidoctor:asciidoctor-gradle-plugin:1.5.3'
        classpath 'org.asciidoctor:asciidoctorj-pdf:1.5.0-alpha.10.1'
...

3. run gradle asciidoctor

The first run will give you:
FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':convertSwagger2markup'.

javaslang.collection.HashMap.ofEntries([Ljavaslang/Tuple2;)Ljavaslang/collection/HashMap;

The following runs will give you:
FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':convertSwagger2markup'.

Could not initialize class ch.netzwerg.paleo.ColumnType

With --stacktrace:

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':convertSwagger2markup'.
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70)
	at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:62)
	at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54)
	at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58)
	at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:97)
	at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:87)
	at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52)
	at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52)
	at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54)
	at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43)
	at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34)
	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241)
	at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:625)
	at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:580)
	at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
	at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
	at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
Caused by: java.lang.NoClassDefFoundError: Could not initialize class ch.netzwerg.paleo.ColumnType
	at ch.netzwerg.paleo.ColumnIds$StringColumnId.<init>(ColumnIds.java:69)
	at ch.netzwerg.paleo.ColumnIds$StringColumnId.of(ColumnIds.java:73)
	at io.github.swagger2markup.internal.component.ParameterTableComponent.apply(ParameterTableComponent.java:76)
	at io.github.swagger2markup.internal.component.PathOperationComponent.buildParametersSection(PathOperationComponent.java:198)
	at io.github.swagger2markup.internal.component.PathOperationComponent.apply(PathOperationComponent.java:100)
	at io.github.swagger2markup.internal.document.PathsDocument.applyPathOperationComponent(PathsDocument.java:223)
	at io.github.swagger2markup.internal.document.PathsDocument.buildOperation(PathsDocument.java:207)
	at io.github.swagger2markup.internal.document.PathsDocument.lambda$null$1(PathsDocument.java:133)
	at io.github.swagger2markup.internal.document.PathsDocument.lambda$buildsPathsSection$2(PathsDocument.java:133)
	at io.github.swagger2markup.internal.document.PathsDocument.buildsPathsSection(PathsDocument.java:127)
	at io.github.swagger2markup.internal.document.PathsDocument.apply(PathsDocument.java:103)
	at io.github.swagger2markup.Swagger2MarkupConverter.applyPathsDocument(Swagger2MarkupConverter.java:197)
	at io.github.swagger2markup.Swagger2MarkupConverter.toFolder(Swagger2MarkupConverter.java:182)
	at io.github.swagger2markup.Swagger2MarkupConverter$toFolder$0.call(Unknown Source)
	at io.github.swagger2markup.tasks.Swagger2MarkupTask.convertSwagger2markup(Swagger2MarkupTask.groovy:68)
	at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73)
	at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.doExecute(DefaultTaskClassInfoStore.java:142)
	at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:135)
	at org.gradle.api.internal.project.taskfactory.DefaultTaskClassInfoStore$StandardTaskAction.execute(DefaultTaskClassInfoStore.java:122)
	at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:762)
	at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(AbstractTask.java:729)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:121)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
	at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:110)
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92)
	... 28 more

[McDime]

As a workaround (if someone else is having the same issue), you can use io.springfox:springfox-staticdocs:2.6.1 to generate *.adoc files from the test class using Swagger2MarkupResultHandler.outputDirectory(outputDir).build().
In this way, you can avoid usage of the swagger2markup gradle plugin that conflicts with the Kotlin gradle pluging.

The asciidoctor gradle plugin works fine together with the Kotlin.

I managed to fix this by upgrading swagger2markup to the latest version:

dependencies {
        classpath "io.github.swagger2markup:swagger2markup:1.3.2"
        classpath "io.github.swagger2markup:swagger2markup-gradle-plugin:1.3.1"
  }

(Version 1.3.2 of the Gradle plugin is not released yet)