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除非已将Nexus上部署的自定义Maven插件安装在本地存储库中或设置为依赖项，否则无法在本地计算机上的项目中使用

[英]Custom Maven plugin deployed on Nexus can't be used on a project on local machine unless the plugin is installed on local repo or set as a dependency

 原文  2018-02-16 23:05:01  1   1    java/ maven/ maven-3/ maven-plugin/ nexus

问题描述

我已经开发了一个自定义Maven插件，并将其部署（mvn deploy）在远程Nexus存储库中。 罐子已使用如下pom正确上传： 

<?xml version="1.0" encoding="UTF-8"?> 
<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>something</groupId>    
    <artifactId>xxx-maven-plugin</artifactId>
    <version>1.0.0-SNAPSHOT</version>   
    <packaging>maven-plugin</packaging>

该jar包含必要的plugin.xml文件，因此看起来不错。

我已经配置了一个项目来使用插件： 

    <plugins>
        <plugin>
            <groupId>something</groupId>
            <artifactId>xxx-maven-plugin</artifactId>
            <version>1.0.0-SNAPSHOT</version>
        </plugin>
        ...

但是当我运行mvn xxx:mygoal它显示此错误： 

[ERROR] No plugin found for prefix 'xxx' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories [local (/Users/myuser/.m2/repository), remote-repo (http://someremoterepo/nexus/content/groups/central/)] -> [Help 1]

使其生效的唯一方法是将插件既作为插件又作为项目中的依赖项添加： 

    ...
        <dependency>
            <groupId>something</groupId>
            <artifactId>xxx-maven-plugin</artifactId>
            <version>1.0.0-SNAPSHOT</version>
        </dependency>
    </dependencies>
    <plugins>
        <plugin>
            <groupId>something</groupId>
            <artifactId>xxx-maven-plugin</artifactId>
            <version>1.0.0-SNAPSHOT</version>
        </plugin>
        ...

现在，它确实找到了插件并正确执行了。 我究竟做错了什么？ 我想没有必要将其定义为插件和依赖项，其他第三方插件则没有此要求。

更新：

我已经将此添加到我的settings.xml文件中： 

     <pluginGroup>something</pluginGroup>
  </pluginGroups>

现在错误有所不同： 

[WARNING] The POM for something:xxx-maven-plugin:jar:1.0.0-SNAPSHOT is missing, no dependency information available
[WARNING] Failed to retrieve plugin descriptor for something:xxx-maven-plugin:1.0.0-SNAPSHOT: Plugin something:xxx-maven-plugin:1.0.0-SNAPSHOT or one of its dependencies could not be resolved: Could not find artifact something:xxx-maven-plugin:jar:1.0.0-SNAPSHOT
[WARNING] The POM for something:xxx-maven-plugin:jar:1.0.0-SNAPSHOT is missing, no dependency information available
...
[ERROR] Plugin something:xxx-maven-plugin:1.0.0-SNAPSHOT or one of its dependencies could not be resolved: Could not find artifact something:xxx-maven-plugin:jar:1.0.0-SNAPSHOT -> [Help 1]

它实际上在回购中。 同样，如果我明确将其添加为依赖项，它确实可以工作。 ???

更新2：

使用Nexus GAV搜索界面，我找到了一个带有artifactId spring-boot-maven-plugin并打包了maven-plugin的插件，并找到了它。 使用包装罐也可以找到它。

然后，我对插件执行相同的操作，在寻找包装的maven-plugin时会找到它，但在使用包装的jar时找不到。

更新3：

在我的本地仓库中，有一个maven-metadata-central-mirror.xml文件，其中包含以下内容： 

<?xml version="1.0" encoding="UTF-8"?>
<metadata>
  <plugins>
    <plugin>
      <name>something</name>
      <prefix>xxx</prefix>
      <artifactId>xxx-maven-plugin</artifactId>
    </plugin>
  </plugins>
</metadata>

完整配置

本地settings.xml： 

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
   <localRepository>/Users/myuser/.m2/repository</localRepository>

  <pluginGroups>
     <pluginGroup>something</pluginGroup>
  </pluginGroups>

  <proxies>
  </proxies>

  <servers>
     <server>
       <id>someremoterepo</id>
       <username>xxxx</username>
       <password>yyyy</password>
     </server>
  </servers>

  <mirrors>
     <mirror>
       <id>someremoterepo</id>
       <name>Nexus Repo</name>
       <url>http://someremoterepo/nexus/content/groups/central/</url>
       <mirrorOf>*</mirrorOf>
     </mirror>
  </mirrors>

  <profiles>
     <profile>
       <id>myprofile</id>
       <activation>
       <activeByDefault>true</activeByDefault>
       </activation>
       <repositories>
         <repository>
           <id>central</id>
           <name>Central</name>
           <releases>
           <enabled>true</enabled>
           <checksumPolicy>warn</checksumPolicy>
           </releases>
           <snapshots>
           <enabled>true</enabled>
           <updatePolicy>never</updatePolicy>
           <checksumPolicy>fail</checksumPolicy>
           </snapshots>
           <url>http://someremoterepo/nexus/content/groups/central</url>
         </repository>
       </repositories>
     </profile>
  </profiles>
</settings>

自定义插件pom.xml： 

<?xml version="1.0" encoding="UTF-8"?>
<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>something</groupId>
    <artifactId>xxx-maven-plugin</artifactId>
    <version>1.0.0-SNAPSHOT</version>
    <packaging>maven-plugin</packaging>

    <name>xxx-maven-plugin</name>
    <description>xxx</description>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <kotlin.version>1.2.21</kotlin.version>
        <junit5.version>5.0.3</junit5.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-project</artifactId>
            <version>2.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven</groupId>
            <artifactId>maven-plugin-api</artifactId>
            <version>3.3.9</version>
        </dependency>
        <dependency>
            <groupId>org.apache.maven.plugin-tools</groupId>
            <artifactId>maven-plugin-annotations</artifactId>
            <version>3.5.1</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-stdlib-jdk8</artifactId>
            <version>${kotlin.version}</version>
        </dependency>
        <dependency>
            <groupId>org.jetbrains.kotlin</groupId>
            <artifactId>kotlin-reflect</artifactId>
            <version>${kotlin.version}</version>
        </dependency>

        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-api</artifactId>
            <version>${junit5.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.junit.jupiter</groupId>
            <artifactId>junit-jupiter-engine</artifactId>
            <version>${junit5.version}</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <version>1.5.10.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>com.github.sbrannen</groupId>
            <artifactId>spring-test-junit5</artifactId>
            <version>1.0.2</version>
            <scope>test</scope>
        </dependency>

    </dependencies>

    <build>
        <sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
        <testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
        <plugins>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.0</version>
                <executions>
                    <execution>
                        <id>jacoco-initialize</id>
                        <phase>initialize</phase>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
            <plugin>
                <artifactId>kotlin-maven-plugin</artifactId>
                <groupId>org.jetbrains.kotlin</groupId>
                <version>${kotlin.version}</version>
                <configuration>
                    <args>
                        <arg>-Xjsr305=strict</arg>
                    </args>
                    <compilerPlugins>
                        <plugin>spring</plugin>
                    </compilerPlugins>
                    <jvmTarget>1.8</jvmTarget>
                </configuration>
                <executions>
                    <execution>
                        <id>compile</id>
                        <phase>compile</phase>
                        <goals>
                            <goal>compile</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>test-compile</id>
                        <phase>test-compile</phase>
                        <goals>
                            <goal>test-compile</goal>
                        </goals>
                    </execution>
                </executions>
                <dependencies>
                    <dependency>
                        <groupId>org.jetbrains.kotlin</groupId>
                        <artifactId>kotlin-maven-allopen</artifactId>
                        <version>${kotlin.version}</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

    <distributionManagement>
        <repository>
            <id>someremoterepo-releases</id>
            <name>releases</name>
            <url>http://someremoterepo/nexus/content/repositories/releases/</url>
        </repository>
        <snapshotRepository>
            <id>someremoterepo-snapshots</id>
            <name>snapshots</name>
            <url>http://someremoterepo/nexus/content/repositories/snapshots/</url>
        </snapshotRepository>
    </distributionManagement>
</project>

包含插件的项目：

唯一相关的位是： 

<?xml version="1.0" encoding="UTF-8"?>
<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>agroup</groupId>
    <artifactId>some-project</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>
    ...
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    ...
    <plugins>
        <plugin>
            <groupId>something</groupId>
            <artifactId>xxx-maven-plugin</artifactId>
            <version>1.0.0-SNAPSHOT</version>
        </plugin>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    ...

1 个解决方案

解决方案1
 0 已采纳  2018-02-19 11:45:51

经过很多努力后，我终于解决了这个问题，解决方案是在settings.xml文件中定义pluginRepositories 。 现在，它可以正确解析插件，而无需将其作为依赖项添加到项目pom中： 

<?xml version="1.0" encoding="UTF-8"?>

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" 
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
          xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
   <localRepository>/Users/myuser/.m2/repository</localRepository>

  <pluginGroups>
     <pluginGroup>something</pluginGroup>
  </pluginGroups>

  <proxies>
  </proxies>

  <servers>
     <server>
       <id>someremoterepo</id>
       <username>xxxx</username>
       <password>yyyy</password>
     </server>
  </servers>

  <mirrors>
     <mirror>
       <id>someremoterepo</id>
       <name>Nexus Repo</name>
       <url>http://someremoterepo/nexus/content/groups/central/</url>
       <mirrorOf>*</mirrorOf>
     </mirror>
  </mirrors>

  <profiles>
     <profile>
       <id>myprofile</id>
       <activation>
       <activeByDefault>true</activeByDefault>
       </activation>
       <repositories>
         <repository>
           <id>central</id>
           <name>Central</name>
           <releases>
           <enabled>true</enabled>
           <checksumPolicy>warn</checksumPolicy>
           </releases>
           <snapshots>
           <enabled>true</enabled>
           <updatePolicy>never</updatePolicy>
           <checksumPolicy>fail</checksumPolicy>
           </snapshots>
           <url>http://someremoterepo/nexus/content/groups/central</url>
         </repository>
       </repositories>
       <pluginRepositories>
         <pluginRepository>
           <id>central</id>
           <name>Central</name>
           <releases>
             <enabled>true</enabled>
             <checksumPolicy>warn</checksumPolicy>
           </releases>
           <snapshots>
             <enabled>true</enabled>
             <updatePolicy>never</updatePolicy>
             <checksumPolicy>fail</checksumPolicy>
           </snapshots>
           <url>http://someremoterepo/nexus/content/groups/central</url>
         </pluginRepository>
       </pluginRepositories>
     </profile>
  </profiles>
</settings>

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