Support for Gradle 6

[Jakobeha]

I recently updated my project to Gradle 6.6 (in order to update to Kotlin 1.4.0) and whenever I build it I get an error with this stack trace. Downgrading gradle back to 5.5.1 fixes the issue:

* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':generateKotlinCommonGrammarSource'.
	at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.lambda$executeIfValid$1(ExecuteActionsTaskExecuter.java:208)
        <32 internal calls>
Caused by: java.lang.NoSuchMethodError: org.gradle.process.internal.worker.WorkerProcessFactory.singleRequestWorker(Ljava/lang/Class;Ljava/lang/Class;)Lorg/gradle/process/internal/worker/SingleRequestWorkerProcessBuilder;
	at com.strumenta.antlrkotlin.gradleplugin.internal.AntlrWorkerManager.createWorkerProcess(AntlrWorkerManager.java:39)
	at com.strumenta.antlrkotlin.gradleplugin.internal.AntlrWorkerManager.runWorker(AntlrWorkerManager.java:34)
	at com.strumenta.antlrkotlin.gradleplugin.AntlrKotlinTask.execute(AntlrKotlinTask.java:230)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        <93 internal calls>

It seems like the plugin is trying to reference a method singleRequestWorker which was removed in the lastest gradle version, so the plugin will need a different API to create workers. A bit of googling suggests that SpotBugs had a similar issue. Maybe I will look into this later.

[drieks]

@ftomassetti: this ticket can be closed, we are already using Gradle 6.7

[ftomassetti]

Right!

[koreQAQ]

Thanks, i changed my gradle version to 5.x , then i fixed this issue.