Question

我有一个具有以下结构的混合Java / Kotlin项目：

用于构建它的My Gradle脚本如下所示：

buildscript {
  ext.kotlin_version = '1.0.4'
  repositories {
    mavenCentral()
  }
  dependencies {
    classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
  }
}

apply plugin: "kotlin"
apply plugin: "application"

mainClassName = "com.mycopany.App"

sourceSets {
  deploy
}

repositories {
  mavenCentral()
}

dependencies {
  compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
  testCompile  'junit:junit:4.11'
  testCompile "org.jetbrains.kotlin:kotlin-test-junit:$kotlin_version"
}

test.testClassesDir = project.tasks.compileTestKotlin.destinationDir

task wrapper(type: Wrapper) {
  gradleVersion="2.7"
}

App.kt是一个简单的程序：

package com.mycompany.App

class App {
    fun run() {
        System.out.println("Hello, Kotlin world!")
    }
}

fun main(args : Array<String>) {
    val app = App()
    app.run()
}

当我尝试使用gradle build构建它时，我收到以下错误消息：

16:13:16.768 [DEBUG] [org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter] Finished executing task ':copyMainKotlinClasses' 16:13:16.768 [LIFECYCLE] [class org.gradle.TaskExecutionLogger] :copyMainKotlinClasses FAILED 16:13:16.769 [INFO] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] :copyMainKotlinClasses (Thread[main,5,main]) completed. Took 0.042 secs. 16:13:16.770 [DEBUG] [org.gradle.execution.taskgraph.AbstractTaskPlanExecutor] Task worker [Thread[main,5,main]] finished, busy: 0.28 secs, idle: 0.005 secs 16:13:16.827 [LIFECYCLE] [org.gradle.BuildResultLogger] 16:13:16.828 [LIFECYCLE] [org.gradle.BuildResultLogger] BUILD FAILED 16:13:16.829 [LIFECYCLE] [org.gradle.BuildResultLogger]

当我尝试在Eclipse（也使用Gradle）中构建它时，我得到了同样的错误。

如果我使用--stacktrace选项运行相同的脚本，我会得到：

Caused by: java.lang.NullPointerException at org.gradle.util.GFileUtils.mkdirs(GFileUtils.java:265) at org.gradle.api.internal.project.taskfactory.OutputFilePropertyAnnotat ionHandler$2$1.execute(OutputFilePropertyAnnotationHandler.java:73) at org.gradle.api.internal.project.taskfactory.OutputFilePropertyAnnotat ionHandler$2$1.execute(OutputFilePropertyAnnotationHandler.java:68) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(Abstra ctTask.java:621) at org.gradle.api.internal.AbstractTask$TaskActionWrapper.execute(Abstra ctTask.java:604) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex ecuteAction(ExecuteActionsTaskExecuter.java:80) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.ex ecuteActions(ExecuteActionsTaskExecuter.java:61) ... 57 more

我该如何解决这个问题？

：compileKotlin在Gradle中失败（混合Java + Kotlin项目）

0 个答案: