Question

我正在尝试编写Hello World Maven插件。

我已将defaultPhase=LifecyclePhase.CLEAN分配给它，但当我执行mvn clean时，它无效。

当我执行mvn gorov:clean时，它正在运行。

有什么建议吗？

DS

代码为：

项目中的位置：maven-plugin\src\main\java\com\gorovdude\plugins\maven\mojos\WriteConsoleMojo.java

package com.gorovdude.plugins.maven.mojos;

import java.io.File;
import org.apache.maven.plugin.AbstractMojo;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.plugins.annotations.LifecyclePhase;
import org.apache.maven.plugins.annotations.Mojo;

@Mojo(name = "clean", defaultPhase = LifecyclePhase.CLEAN, threadSafe = true, aggregator = true)

public class WriteConsoleMojo extends AbstractMojo {

    public void execute() throws MojoExecutionException, MojoFailureException {
        try {

            String path = "C:\\Apache-maven-3.2.5\\testing.txt";
            System.out.println("testing");
            File f = new File(path);

            f.createNewFile();

        } catch (Exception e) {
            throw new MojoExecutionException(e.getMessage(), e);
        }
    }

}

插件的pom.xml：

maven-plugin\pom.xml

中的位置信息

<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>com.gorovdude</groupId>
    <artifactId>gorov-maven-plugin</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>maven-plugin</packaging>
    <description>gorov Maven Plugin</description>

    <properties>
        <mavenVersion>3.0</mavenVersion>
        <mavenPluginVersion>3.1</mavenPluginVersion>
    </properties>

    <prerequisites>
        <maven>${mavenVersion}</maven>
    </prerequisites>

    <dependencies>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-core</artifactId>
            <version>${mavenVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-plugin-api</artifactId>
            <version>${mavenVersion}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugin-tools</groupId>
            <artifactId>maven-plugin-annotations</artifactId>
            <version>${mavenPluginVersion}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-artifact</artifactId>
            <version>2.0.9</version>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.1</version>
                <configuration>
                    <source>1.6</source>
                    <target>1.6</target>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-plugin-plugin</artifactId>
                <version>${mavenPluginVersion}</version>
                <executions>
                    <execution>
                        <id>generate-descriptor</id>
                        <goals>
                            <goal>descriptor</goal>
                        </goals>
                    </execution>
                </executions>
                <configuration>
                    <goalPrefix>gorov</goalPrefix>
                    <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

我运行pom.xml命令的mvn：

项目中的位置：maven-plugin\src\test\pom.xml

<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>com.gorovdude</groupId>
    <artifactId>test-gorov-maven-plugin</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <description>Testing the plugin</description>

    <build>
        <plugins>
            <plugin>
                <groupId>com.gorovdude</groupId>
                <artifactId>gorov-maven-plugin</artifactId>
                <version>0.0.1-SNAPSHOT</version>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

您可以按以下方式调用插件的源代码

<build>
    <plugins>
        <plugin>
            <groupId>com.gorovdude</groupId>
            <artifactId>gorov-maven-plugin</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <executions>
                <execution>
                    <goals>
                        <goal>clean</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

您必须在执行中指定目标。如果你键入＆＃34; maven clean＆＃34;，你只需要调用maven clean插件，而不是你的插件。插件可能包含多个目标，除非您在项目的执行中定义了您想要运行的目标，否则它们将无法运行。

请看这里：https://maven.apache.org/guides/plugin/guide-java-plugin-development.html

Answer 2

如果只输入mvn，请参阅帮助文字：

No goals have been specified for this build. You must specify a valid
  lifecycle phase or a goal in the format <plugin-prefix>:<goal> [...] .
  Available lifecycle phases are: [...] , clean, [...] .

如果您输入mvn clean，则不会调用插件的clean目标，而是the clean phase of the clean lifecycle（其clean目标[maven-]clean[-plugin] }插件默认绑定到它。

如果您输入mvn gorov:clean，那么您使用插件POM中gorov中声明的plugin prefix <goalPrefix>gorov</goalPrefix>（虽然此声明不会是＆＃39} ; t是必要的，因为默认情况下会从插件gorov-maven-plugin的工件ID派生相同的前缀。

另见Maven: Lifecycle vs. Phase vs. Plugin vs. Goal。

Maven插件默认阶段

2 个答案: