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<h2>Passing your Maven classpath to Ant:</h2>

<p>In your pom.xml, configure something like this:</p>
<table class="wysiwyg-macro" data-macro-name="code" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e2NvZGV9&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>
   &lt;build>
    &lt;plugins>
      &lt;plugin>
        &lt;artifactId>maven-antrun-plugin&lt;/artifactId>
        &lt;executions>
          &lt;execution>
            &lt;id>build-config-files&lt;/id>
            &lt;phase>compile&lt;/phase>
            &lt;goals>
              &lt;goal>run&lt;/goal>
            &lt;/goals>
            &lt;configuration>
              &lt;tasks>
                &lt;property name="runtime-classpath" refid="maven.runtime.classpath"/>
                &lt;ant target="build" inheritRefs="true"/>
              &lt;/tasks>
            &lt;/configuration>
          &lt;/execution>
        &lt;/executions>
      &lt;/plugin>
    &lt;/plugins>
  &lt;/build>

</pre></td></tr></table>
<p>In your build.xml, have something like:</p>
<table class="wysiwyg-macro" data-macro-name="code" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e2NvZGV9&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>
     &lt;path id="project.class.path">
        &lt;path path="${runtime-classpath}"/>
    &lt;/path>

</pre></td></tr></table>
<p>The path that maven is using should now be assigned to &quot;runtime-classpath&quot;.</p>

<p>This is very useful for calling a custom ant task, when the definition is in your maven classpath. 
<br class="atl-forced-newline" /></p>

<h2>Using ant-contrib tasks:</h2>

<p>To use ant-contrib tasks with the maven-antrun-plugin you'll need to do a couple of things:</p>

<p>1. Add a taskdef.</p>

<p>2. Add some dependencies for the plugin:</p>

<table class="wysiwyg-macro" data-macro-name="code" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e2NvZGV9&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>
&lt;dependencies>
  &lt;dependency>
    &lt;groupId>ant-contrib&lt;/groupId>
    &lt;artifactId>ant-contrib&lt;/artifactId>
    &lt;version>1.0b3&lt;/version>
    &lt;exclusions>
      &lt;exclusion>
        &lt;groupId>ant&lt;/groupId>
        &lt;artifactId>ant&lt;/artifactId>
      &lt;/exclusion>
    &lt;/exclusions>
  &lt;/dependency>
  &lt;dependency>
    &lt;groupId>ant&lt;/groupId>
    &lt;artifactId>ant-nodeps&lt;/artifactId>
    &lt;version>1.6.5&lt;/version>
  &lt;/dependency>
&lt;/dependencies>
</pre></td></tr></table>

<p>Notice that the transcient dependency on ant:ant is execluded for ant-contrib. This is due to ant-contrib having a dependency on ant-1.5. I was getting the following error before replacing ant with ant-nodeps-1.6.5:</p>

<p>Here's full example of using the antrun plugin to move a war file to a jboss server deploy directory once it is built. You can also define the <em>unpacked</em> property (ie. mvn install -Dunpacked) to have the app moved exploded (or unpacked).</p>

<table class="wysiwyg-macro" data-macro-name="code" style="background-image: url(/plugins/servlet/confluence/placeholder/macro-heading?definition=e2NvZGV9&amp;locale=en_GB&amp;version=2); background-repeat: no-repeat;" data-macro-body-type="PLAIN_TEXT"><tr><td class="wysiwyg-macro-body"><pre>
&lt;plugin>
  &lt;artifactId>maven-antrun-plugin&lt;/artifactId>
  &lt;executions>
    &lt;execution>
      &lt;phase>install&lt;/phase>
      &lt;configuration>
        &lt;tasks>
          &lt;taskdef resource="net/sf/antcontrib/antcontrib.properties" classpathref="maven.plugin.classpath"/>

&lt;delete file="${my.jboss.server}/deploy/${build.finalName}.war"/>
          &lt;delete dir="${my.jboss.server}/deploy/${build.finalName}.war"/>

&lt;if>
            &lt;isset property="unpacked"/>
            &lt;then>
              &lt;mkdir dir="${my.jboss.server}/deploy/${build.finalName}.war"/>
              &lt;unzip src="${project.build.directory}/${build.finalName}.war"
                     dest="${wsm.jboss.server}/deploy/${build.finalName}.war"/>
            &lt;/then>
            &lt;else>
              &lt;copy todir="${my.jboss.server}/deploy">
                &lt;fileset dir="${project.build.directory}" includes="${build.finalName}.war"/>
              &lt;/copy>
            &lt;/else>
          &lt;/if>
       &lt;/tasks>

&lt;/configuration>
      &lt;goals>
        &lt;goal>run&lt;/goal>
      &lt;/goals>
     &lt;/execution>
   &lt;/executions>
   &lt;dependencies>
   &lt;dependency>
     &lt;groupId>ant-contrib&lt;/groupId>
     &lt;artifactId>ant-contrib&lt;/artifactId>
     &lt;version>1.0b3&lt;/version>
     &lt;exclusions>
       &lt;exclusion>
         &lt;groupId>ant&lt;/groupId>
         &lt;artifactId>ant&lt;/artifactId>
       &lt;/exclusion>
     &lt;/exclusions>
   &lt;/dependency>
   &lt;dependency>
     &lt;groupId>ant&lt;/groupId>
     &lt;artifactId>ant-nodeps&lt;/artifactId>
     &lt;version>1.6.5&lt;/version>
   &lt;/dependency>
  &lt;/dependencies>
&lt;/plugin>
</pre></td></tr></table>

<h2>Maven plugin classpath bug.</h2>

<p>Using the Maven Antrun Plugin in multiple projects in the Reactor</p>

<p>In Maven 2.x, there is a significant bug that can lead to very perplexing failures with the antrun plugin. There are two conditions that you have to meet to get into this problem.</p>

<p>1) You have to use the plugin in two projects that are loaded into the reactor via &lt;modules/&gt; .<br />
2) You have to require additional plugin dependencies on the plugin.</p>

<p>In Maven 2.x, the dependencies of the first project into the reactor win, and all the others are entirely ignored.</p>

<p>Concretely, if your first project uses the plugin with no special dependencies, and your second one tries to use ant-trax, the second antrun execution will fail, and complain that it can't find the classes in ant-trax.</p>

<p>The only solution to this is to ensure that, in all of the places where you use the plugin, you list the same dependencies.</p>

<p>This problem has been fixed in Maven 3.</p>