概述

timer plugin, 提供4个goal:

• currentTime
• currentDate
• currentMonth
• currentYear

打包

命令

maven clean install

常见错误

goalPrefix MISSING

错误信息
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-plugin-plugin:3.13.1:helpmojo (help-goal) on project timer-plugin: You need to specify a goalPrefix as it can not be correctly computed -> [Help 1]

原因
自动生成的配置中，有一个属性goalPrefix，这个属性用于配置插件的缩写名，默认情况下，符合前面命名要求的时候，不需要配置.

• maven 官方插件： maven-XXX-plugin
• 非官方插件: XXX-maven-plugin

如果不满足上述约定,则需要手动指定goalPrefix,在当前repo 文件下,添加如下配置：

  <build><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-plugin-plugin</artifactId><version>3.13.1</version><configuration><goalPrefix>timer-plugin</goalPrefix></configuration></plugin></plugins>
</build>

exec

命令行执行

mvn cn.jhs.maven.plugins:timer-plugin:1.0-SNAPSHOT:currentTime cn.jhs.maven.plugins:timer-plugin:1.0-SNAPSHOT:currentYear

绑定maven-phase执行

在其他的maven项目中，指定当前插件:

<build><plugins><plugin><groupId>cn.jhs.maven.plugins</groupId><artifactId>timer-plugin</artifactId><version>1.0-SNAPSHOT</version><executions><execution><id>timer-pre-clean</id><goals><goal>currentYear</goal><goal>currentMonth</goal><goal>currentDate</goal></goals><phase>pre-clean</phase></execution><execution><id>timer-clean</id><goals><goal>currentTime</goal></goals><phase>clean</phase></execution></executions></plugin></plugins>
</build>

best practice

添加descriptor + helpmojo

<plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-plugin-plugin</artifactId><executions><execution><id>mojo-descriptor</id><goals><goal>descriptor</goal></goals></execution><execution><id>help-goal</id><goals><goal>helpmojo</goal></goals></execution></executions></plugin>

后续执行命令 mvn cn.jhs.maven.plugins:timer-plugin:1.0-SNAPSHOT:help 可以看到这个plugin的完整说明.

code

CurrentDateMojo

@Mojo(name="currentDate",defaultPhase= LifecyclePhase.CLEAN)
public class CurrentDateMojo extends AbstractMojo {@Overridepublic void execute() throws MojoExecutionException, MojoFailureException {getLog().info(this.getClass().getSimpleName()+"  plugin is running，current date is " + LocalDate.now().getYear());}
}

其它(略)