我如何找出Maven目标绑定到的默认阶段? [英] How can I find out the default phase a Maven goal binds to?

问题描述

在Maven中，如何找出目标的默认阶段(如果针对此特定目标根本没有任何默认阶段)?

In Maven, how can I find out the default phase of a goal (if any default phase exists at all for this particular goal)?

我正在使用一个名为 Jetty Maven插件的Maven插件.它包含一个目标jetty:run.运行命令mvn jetty:run(注意，此命令仅包含目标，而不是阶段)，首先将构建pom.xml指定的Web应用程序，直到默认的

I am using a Maven plugin called Jetty Maven Plugin. It contains a goal jetty:run. Running the command mvn jetty:run (notice this command only contains a goal, not a phase) first builds a pom.xml-specified web application up to the default test-compile phase, then deploys it inside a Jetty server.

Mojo API规范中指出，目标可以在其源代码中(通过@phase或通过@execute phase)为其分配了默认阶段. .

As pointed out in the Mojo API Specification, a goal can have a default phase assigned to it in its source code (via @phase or via @execute phase). In case of jetty:run, the default phase is @execute phase="test-compile".

但是找到源代码文件可能会变得非常复杂.有没有更简单的方法来找出默认阶段?

But finding the source code file can get quite complicated. Is there an easier way for finding out the default phase?

推荐答案

最简单的解决方案是使用

The simplest solution is to use the maven-help-plugin like the following:

mvn help:describe -DartifactId=maven-compiler-plugin -DgroupId=org.apache.maven.plugins -Dgoal=compile -Ddetail

将在第一行中打印出许多信息:

which will printout many information but in the first lines:

[INFO] Mojo: 'compiler:compile'
compiler:compile
  Description: Compiles application sources
  Implementation: org.apache.maven.plugin.CompilerMojo
  Language: java
  Bound to phase: compile

  Available parameters:
  ....

如果您尝试跳船，请按照以下步骤运行:

If you try that for jetty:run like this:

mvn help:describe -DartifactId=jetty-maven-plugin -DgroupId=org.mortbay.jetty -Dgoal=run -Ddetail

您将获得很大的输出，但是您不会看到默认阶段，因为它打算从命令行调用:

You will get a large output but you won't see a default phase, cause it's intended to be called from command line:

[INFO] Mojo: 'jetty:run'
jetty:run
  Description: This goal is used in-situ on a Maven project without first
    ....
    redeploying.
     .....

  Implementation: org.mortbay.jetty.plugin.JettyRunMojo
  Language: java
  Before this mojo executes, it will call:
    Phase: 'test-compile'

  Available parameters:
      ....

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