java 为什么 Maven 找不到我的自定义 Mojo？
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Why can Maven not find my custom Mojo?
提问by yu.pitomets
I have an own Mojo class.
我有一个自己的 Mojo 课程。
@Mojo(name="mojo", threadSafe=true)
public class MyMojo extends AbstractMojo
{
@Component
private MavenProject project;
public void execute() throws MojoExecutionException, MojoFailureException
{
getLog().info("Execute");
}
}
After that I install it in local repository.
之后，我将其安装在本地存储库中。
[INFO] Applying mojo extractor for language: java-annotations
[INFO] Mojo extractor for language: java-annotations found 0 mojo descriptors.
[INFO] Applying mojo extractor for language: java
[INFO] Mojo extractor for language: java found 0 mojo descriptors.
[INFO] Applying mojo extractor for language: bsh
[INFO] Mojo extractor for language: bsh found 0 mojo descriptors.
....
[INFO] BUILD SUCCESS
But when try to call 'mojo' goal I got en error
但是当尝试调用“mojo”目标时，我出错了
[ERROR] Could not find goal 'mojo' in plugin my.plugins:my-plugin:1.0-SNAPSHOT among available goals -> [Help 1]
what is the problem?
Here is maven-plugin-plugin configuration.
这是 maven-plugin-plugin 配置。
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-plugin-plugin</artifactId>
<version>3.2</version>
<configuration>
<skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
</configuration>
</plugin>
Old mechanism with javadoc annotations works well, but i want to use java annotation.
带有 javadoc 注释的旧机制运行良好，但我想使用 java 注释。
<dependency>
<groupId>org.apache.maven.plugin-tools</groupId>
<artifactId>maven-plugin-annotations</artifactId>
<version>3.2</version>
</dependency>
[INFO] --- maven-plugin-plugin:3.2:descriptor (default-descriptor) @ bla-mvn-plugin
Why default-descriptor is enabled instead of mojo-descriptor?
为什么启用 default-descriptor 而不是 mojo-descriptor？
回答by ZhekaKozlov
Add this section to your plugin's POM:
将此部分添加到您的插件的 POM 中：
<build>
<pluginManagement>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-plugin-plugin</artifactId>
<version>3.2</version>
<configuration>
<skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
</configuration>
<executions>
<execution>
<id>mojo-descriptor</id>
<phase>process-classes</phase>
<goals>
<goal>descriptor</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</pluginManagement>
</build>
PS. See maven-compiler-plugin:3.0 sources for full working example of building MOJOs with annotations
附注。请参阅 maven-compiler-plugin:3.0 源代码，了解使用注释构建 MOJO 的完整工作示例
回答by gregwhitaker
EDIT (addressing the use of the Mojo annotations):
编辑（解决使用 Mojo 注释）：
I tried building a plugin with the annotations and ran into the same issue. I solved it by binding the plugin to a default lifecycle phase as shown below in the @Mojoannotation:
我尝试使用注释构建插件并遇到了同样的问题。我通过将插件绑定到默认生命周期阶段来解决它，如下@Mojo注释所示：
Mojo
魔力
@Mojo(name = "hello", defaultPhase = LifecyclePhase.INSTALL)
public class MyMojo extends AbstractMojo
{
public void execute() throws MojoExecutionException, MojoFailureException
{
getLog().info("Hello");
}
}
Mojo POM
魔力聚甲醛
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>testware.mojotest</groupId>
<artifactId>mojotest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mojotest</name>
<packaging>maven-plugin</packaging>
<dependencies>
<dependency>
<groupId>org.apache.maven</groupId>
<artifactId>maven-plugin-api</artifactId>
<version>2.0</version>
</dependency>
<dependency>
<groupId>org.apache.maven.plugin-tools</groupId>
<artifactId>maven-plugin-annotations</artifactId>
<version>3.2</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-plugin-plugin</artifactId>
<version>3.2</version>
<configuration>
<skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
</configuration>
</plugin>
</plugins>
</build>
</project>
POM of Project Invoking Mojo
项目调用Mojo的POM
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>testware.mojotest</groupId>
<artifactId>mojotest-runner</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>mojotest-runner</name>
<build>
<plugins>
<plugin>
<groupId>testware.mojotest</groupId>
<artifactId>mojotest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>hello</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
