尝试向我的自定义Gradle插件添加依赖项时得到NoClassDefFoundError，但是我还没有找到解决它的方法。
已添加到the plugin's dependency block：
implementation("org.apache.logging.log4j:log4j-api:2.11.2")
implementation("org.apache.logging.log4j:log4j-core:2.11.2")
已添加到the plugin's DeclarationAttributeAltererExtension implementation：
val log = LogManager.getLogger(ReallyAllOpenExtension::class.java)
这是完整的堆栈跟踪：
no.synth.kotlin.plugins.reallyallopen.FunctionalPluginTest > should include plugin via plugins block FAILED
org.gradle.testkit.runner.UnexpectedBuildFailure: Unexpected build execution failure in /var/folders/g4/024g2mzn7jl5s2b2cvg_ythh00016k/T/junit5022572406008108408 with arguments [build]
Output:
> Task :compileKotlin FAILED
e: java.lang.NoClassDefFoundError: org/apache/logging/log4j/LogManager
at no.synth.kotlin.plugins.reallyallopen.ReallyAllOpenExtension.<clinit>(ReallyAllOpenPlugin.kt:106)
at no.synth.kotlin.plugins.reallyallopen.ReallyAllOpenRegistrar.registerProjectComponents(ReallyAllOpenPlugin.kt:79)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:174)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment.<init>(KotlinCoreEnvironment.kt:123)
at org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment$Companion.createForProduction(KotlinCoreEnvironment.kt:413)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.createCoreEnvironment(K2JVMCompiler.kt:259)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:124)
at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:54)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:84)
at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.kt:42)
at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:103)
at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:364)
at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:105)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:237)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.access$compileIncrementally(IncrementalCompilerRunner.kt:37)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner$compile$2.invoke(IncrementalCompilerRunner.kt:79)
at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:91)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.execIncrementalCompiler(CompileServiceImpl.kt:597)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.access$execIncrementalCompiler(CompileServiceImpl.kt:102)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:455)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:1023)
at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:102)
at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:1065)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:1022)
at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:454)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at java.rmi/sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:359)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:200)
at java.rmi/sun.rmi.transport.Transport$1.run(Transport.java:197)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.rmi/sun.rmi.transport.Transport.serviceCall(Transport.java:196)
at java.rmi/sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:562)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:796)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:677)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at java.rmi/sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:676)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.LogManager
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:588)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
... 44 more
完整的实现和测试用例位于https://github.com/henrik242/kotlin-really-allopen/tree/unable-to-add-dependencies的单独分支中
通过运行./gradlew clean :kotlin-really-allopen:build :kotlin-really-allopen:publishToMavenLocal :functional-test:build
答案 0 :(得分：2)
我怀疑您的问题是由于known classloader issues是由Gradle的TestKit执行的插件引起的。
我将解释该链接的内容：您的插件及其运行时类路径是通过一个类加载器加载的。功能测试及其类路径被加载到另一个不同的类加载器中。这种情况是 NoClassDefFoundError s 的经典配方。因此，将TestKit与自定义插件一起使用时，必须将插件的运行时类路径显式注入正在执行该插件的功能测试的运行时类路径中。
项目的组织方式-以功能测试作为子项目 -可能会使那些已知的类加载器问题更加复杂。当然，这使事情变得比他们需要的复杂。
因此，您的问题的答案是：Reorganize your project。
我使用the Gradle User Guide as a guide简化了您的项目。 我分叉并重组了the way Gradle advises。
固定代码位于分支的able-to-add-dependencies branch中。