Maven Invoker：IllegalStateException [英] Maven Invoker: IllegalStateException

问题描述

我有一个多模块Maven项目（ https://github.com/veniltonjr/msplearning ）

I have a multi-module Maven project (https://github.com/veniltonjr/msplearning)

我的一个模块 我需要以编程方式运行Maven构建的命令clean install ，但是当我调用这些目标的执行时发生以下错误：

One of my modules I need run programmatically the command from Maven build "clean install", but when I invoke the execution of these goals the following error occurs:

java.lang.IllegalStateException： Maven未指定应用程序目录，系统属性中未提供$ {maven.home}。请至少注明以下内容。

在 Maven Invoker 文档据说M2_HOME环境变量必须存在。

In the Maven Invoker documentation is said that M2_HOME environment variable must exist.

已经在我的SO中设置了这个变量。这不足以使方法调用工作？按照我运行相关方法的代码片段：

Already have this variable set in my SO. This should not be enough to make the method invoke work? Follows the code snippet where I run the method in question:

Invoker invoker = new DefaultInvoker();
invoker.setLocalRepositoryDirectory(new File("C:\\git\\msplearning"));

InvocationRequest request = new DefaultInvocationRequest();
request.setGoals(Arrays.asList("clean", "install"));
InvocationResult result = invoker.execute(request); // Exception occours here...

已经，谢谢！

编辑（解决方案）

我必须设置POM并设置Maven Home，在我的情况下在M3_HOME环境变量中：

I had to set the POM and also set the Maven Home, which in my case is in the M3_HOME environment variable:

InvocationRequest request = new DefaultInvocationRequest();
request.setPomFile(new File("C:\\git\\msplearning\\pom.xml"));
request.setGoals(Collections.singletonList("verify"));

Invoker invoker = new DefaultInvoker();
invoker.setMavenHome(new File(System.getenv("M3_HOME")));
InvocationResult result = invoker.execute(request);

谢谢@RobertScholte和@khmarbaise！

Thanks @RobertScholte and @khmarbaise!

推荐答案

设置 request.pomFile 或 request.baseDirectory 以便调用者知道应该执行Apache Maven的目录或文件。

Either set the request.pomFile or request.baseDirectory so the Invoker knows from which directory or file Apache Maven should be executed.

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