从Maven Central安装Maven本身

Question

我有一个maven插件，我想在不同的Maven版本(例如: 2.2.1和3.0.4)上进行测试。理想情况下，我不希望运行构建的用户必须手动安装这些版本。

是否可以从Maven Central或其他来源安装特定版本的Maven本身，然后将其缓存到本地Maven存储库中，以供后续构建使用？

Answer 1

Maven发行版存储在Maven Central Repository中，如下所示：

• http://mvnrepository.com/artifact/org.apache.maven/apache-maven
• https://repository.sonatype.org/index.html#nexus-search;gav~org.apache.maven~apache-mavenkw,versionexpand

因此，它可以用作具有以下坐标的正常依赖：

tar.gz变体：

<dependency>
    <groupId>org.apache.maven</groupId>
    <artifactId>apache-maven</artifactId>
    <version>3.0.4</version>
    <classifier>bin</classifier>
    <type>tar.gz</type>
</dependency>

zip变体：

<dependency>
    <groupId>org.apache.maven</groupId>
    <artifactId>apache-maven</artifactId>
    <version>3.0.4</version>
    <classifier>bin</classifier>
    <type>zip</type>
</dependency>

其余的是非常标准的-你可能会在集成测试poms中使用它，并按照@khmarbaise推荐的方式用maven-invoker-plugin调用它们。

Answer 2

为什么不简单地安装一个持续集成(CI)服务器，比如Jenkins / Hudson / TeamCity /等？CI服务器允许您针对不同版本的SDK运行构建。

如果你的插件是开源的(在GitHub上)，我相信你可以从Cloudbees获得免费的Jenkins主机。

从Maven Central下载Maven本身是不可能的。你只能从他们的网站上下载。

Answer 3

你可以做如下的事情：

   <profile>
      <id>run-its</id>
      <build>
        <!--  Download the different Maven versions -->
        <plugins>
          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>wagon-maven-plugin</artifactId>
            <version>1.0-beta-3</version>
            <executions>
              <execution>
                <id>download-maven-2.0.11</id>
                <phase>prepare-package</phase>
                <goals>
                  <goal>download-single</goal>
                </goals>
                <configuration>
                  <url>http://archive.apache.org/dist/maven/binaries/</url>
                  <fromFile>apache-maven-2.0.11-bin.tar.gz</fromFile>
                  <toDir>${project.build.directory}/maven/download/</toDir>
                </configuration>
              </execution>
              <execution>
                <id>download-maven-2.2.1</id>
                <phase>prepare-package</phase>
                <goals>
                  <goal>download-single</goal>
                </goals>
                <configuration>
                  <url>http://archive.apache.org/dist/maven/binaries/</url>
                  <fromFile>apache-maven-2.2.1-bin.tar.gz</fromFile>
                  <toDir>${project.build.directory}/maven/download/</toDir>
                </configuration>
              </execution>
              <execution>
                <id>download-maven-3.0.3</id>
                <phase>prepare-package</phase>
                <goals>
                  <goal>download-single</goal>
                </goals>
                <configuration>
                  <url>http://archive.apache.org/dist/maven/binaries/</url>
                  <fromFile>apache-maven-3.0.3-bin.tar.gz</fromFile>
                  <toDir>${project.build.directory}/maven/download/</toDir>
                </configuration>
              </execution>
            </executions>
          </plugin>


          <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>truezip-maven-plugin</artifactId>
            <version>1.0-beta-4</version>
            <executions>
              <execution>
                <id>extract-maven-2.0.11</id>
                <goals>
                  <goal>copy</goal>
                </goals>
                <phase>prepare-package</phase>
                <configuration>
                  <fileset>
                    <directory>${project.build.directory}/maven/download/apache-maven-2.0.11-bin.tar.gz</directory>
                    <outputDirectory>${project.build.directory}/maven/tools/</outputDirectory>
                  </fileset>
                </configuration>
              </execution>
              <execution>
                <id>extract-maven-2.2.1</id>
                <goals>
                  <goal>copy</goal>
                </goals>
                <phase>prepare-package</phase>
                <configuration>
                  <fileset>
                    <directory>${project.build.directory}/maven/download/apache-maven-2.2.1-bin.tar.gz</directory>
                    <outputDirectory>${project.build.directory}/maven/tools/</outputDirectory>
                  </fileset>
                </configuration>
              </execution>
              <execution>
                <id>extract-maven-3.0.3</id>
                <goals>
                  <goal>copy</goal>
                </goals>
                <phase>prepare-package</phase>
                <configuration>
                  <fileset>
                    <directory>${project.build.directory}/maven/download/apache-maven-3.0.3-bin.tar.gz</directory>
                    <outputDirectory>${project.build.directory}/maven/tools/</outputDirectory>
                  </fileset>
                </configuration>
              </execution>
            </executions>
          </plugin>

          <!--
            This is currently needed due to a bug of the truezip-plugin cause it unpacks without permission!
            see http://jira.codehaus.org/browse/MOJO-1796
           -->
          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-antrun-plugin</artifactId>
            <version>1.7</version>
            <executions>
                <execution>
                  <id>chmod-files</id>
                  <phase>package</phase>
                  <goals>
                    <goal>run</goal>
                  </goals>
                  <configuration>
                    <target>
                      <chmod file="${project.build.directory}/maven/tools/apache-maven-2.0.11/bin/mvn" perm="+x"/>
                      <chmod file="${project.build.directory}/maven/tools/apache-maven-2.2.1/bin/mvn" perm="+x"/>
                      <chmod file="${project.build.directory}/maven/tools/apache-maven-3.0.3/bin/mvn" perm="+x"/>
                    </target>
                  </configuration>
                </execution>
              </executions>
          </plugin>

          <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-invoker-plugin</artifactId>
            <version>1.5</version>
            <dependencies>
              <dependency>
                <groupId>org.codehaus.groovy</groupId>
                <artifactId>groovy</artifactId>
                <version>1.8.4</version>
              </dependency>
            </dependencies>
            <configuration>
              <debug>false</debug>
                  <!-- src/it-ip as for integration tests invoker plugin for the time of transition to maven-invoker-plugin -->
              <projectsDirectory>src/it</projectsDirectory>
              <showVersion>true</showVersion>
              <pomIncludes>
                <pomInclude>*/pom.xml</pomInclude>
              </pomIncludes>
              <preBuildHookScript>setup</preBuildHookScript>
              <postBuildHookScript>verify</postBuildHookScript>
              <settingsFile>src/it/settings.xml</settingsFile>
            </configuration>
            <executions>
              <execution>
                <id>integration-test-maven-2.0.11</id>
                <goals>
                  <goal>install</goal>
                  <goal>run</goal>
                </goals>
                <configuration>
                  <reportsDirectory>${project.build.directory}/invoker-reports-2.0.11</reportsDirectory>
                  <localRepositoryPath>${project.build.directory}/local-repo-2.0.11</localRepositoryPath>
                  <cloneProjectsTo>${project.build.directory}/it-2.0.11</cloneProjectsTo>
                  <mavenHome>${project.build.directory}/maven/tools/apache-maven-2.0.11</mavenHome>
                  <goals>
                    <goal>clean</goal>
                    <goal>test</goal>
                  </goals>
                </configuration>
              </execution>
              <execution>
                <id>integration-test-maven-2.2.1</id>
                <goals>
                  <goal>install</goal>
                  <goal>run</goal>
                </goals>
                <configuration>
                  <reportsDirectory>${project.build.directory}/invoker-reports-2.2.1</reportsDirectory>
                  <localRepositoryPath>${project.build.directory}/local-repo-2.2.1</localRepositoryPath>
                  <cloneProjectsTo>${project.build.directory}/it-2.2.1</cloneProjectsTo>
                  <mavenHome>${project.build.directory}/maven/tools/apache-maven-2.2.1</mavenHome>
                  <goals>
                    <goal>clean</goal>
                    <goal>test</goal>
                  </goals>
                </configuration>
              </execution>
              <execution>
                <id>integration-test-maven-3.0.3</id>
                <goals>
                  <goal>install</goal>
                  <goal>run</goal>
                </goals>
                <configuration>
                  <reportsDirectory>${project.build.directory}/invoker-reports-3.0.3</reportsDirectory>
                  <localRepositoryPath>${project.build.directory}/local-repo-3.0.3</localRepositoryPath>
                  <cloneProjectsTo>${project.build.directory}/it-3.0.3</cloneProjectsTo>
                  <mavenHome>${project.build.directory}/maven/tools/apache-maven-3.0.3</mavenHome>
                  <goals>
                    <goal>clean</goal>
                    <goal>test</goal>
                  </goals>
                </configuration>
              </execution>
            </executions>
          </plugin>
        </plugins>
      </build>
    </profile>

这将下载不同的Maven版本，解压.tar.gz存档，使mvn成为可执行文件，并使用maven-invoker-plugin运行与这些不同maven版本的所有集成测试。

，但是，我不推荐这样做。更好的方法是使用CI解决方案(如前所述)，它包含不同的Maven安装。然后，您可以分别为每个Maven版本运行集成测试。