Building/Releasing projects with maven release plugin

This post describes about building/releasing projects with maven using the maven release plugin with org.wso2.maven:wso2-release-pre-prepare-plugin.


1. Checkout the svn repo and create two folders as tag and trunk.

2. Then you need to create a Maven Multi Module project called 'trunk' and then add following sections to the main pom.xml

<properties>
      <project.scm.id>my.svn.server</project.scm.id>
</properties>

 <scm>
      <connection>scm:svn:http://127.0.0.1/subversion/sohani.repo/test9/trunk</connection>
 <developerConnection>scm:svn:http://127.0.0.1/subversion/sohani.repo/test9/trunk</developerConnection>
<url>http://127.0.0.1/subversion/sohani.repo/test9/trunk</url>
</scm>


 <plugin>
          <artifactId>maven-release-plugin</artifactId>
          <version>2.5</version>
          <configuration>
            <preparationGoals>clean</preparationGoals>
            <completionGoals>org.wso2.maven:wso2-release-pre-prepare-plugin:1.1.0:pre-prepare</completionGoals>
<!-- This must be set! The plugin throws a NPE when not set -->
             <tagBase>http://127.0.0.1/subversion/sohani.repo/test9/tags</tagBase>
          </configuration>
 </plugin>


   <distributionManagement>
<repository>
      <id>my-releases</id>
      <url>http://localhost:8081/nexus/content/repositories/releases/</url>
    </repository>
</distributionManagement>


  <pluginRepository>
<id>wso2-public</id>
<url>http://maven.wso2.org/nexus/content/groups/wso2-public</url>
  </pluginRepository>

3. In settings.xml resides at .m2, you need to add below sections.

   <server>

      <id>my-releases</id>

      <username><nexus_uname></username>

      <password><nexus_password></password>

    </server>

  <server>

     <id>my.svn.server</id>

     <username><svn_uname></username>

     <password><svn_password></password>

   </server>

  <mirror>

      <id>nexus</id>

      <mirrorOf>*</mirrorOf>

      <name>Human Readable Name for this Mirror.</name>

      <url>http://localhost:8081/nexus/content/groups/public</url>

    </mirror>

   <profile>

            <id>nexus</id>

            <!--Enable snapshots for the built in central repo to direct -->

            <!--all requests to nexus via the mirror -->

            <repositories>

                <repository>

                <id>central</id>

                <url>http://central</url>

                <releases><enabled>true</enabled></releases>

                <snapshots><enabled>true</enabled></snapshots>

                </repository>

            </repositories>

            <pluginRepositories>

                <pluginRepository>

                    <id>central</id>

                    <url>http://central</url>

                    <releases><enabled>true</enabled></releases>

                    <snapshots><enabled>true</enabled></snapshots>

                </pluginRepository>

            </pluginRepositories>

        </profile>

   <activeProfile>nexus</activeProfile>

4. Then navigate to the checkout location (trunk) of the svn repo and execute below commands

mvn release:prepare -Dusername=<svn_uname> -Dpassword=<svn_password>

mvn release:perform

5. If you want to revert changes you can execute below commands

mvn release:rollback

mvn release:clean