build-taskdefs.xml

<project>
  <!-- create deployment POM for preparation -->
  <macrodef name="prepare-pom">
    <sequential>
      <tstamp/>
      <delete file="build/pom.xml"/> <!-- force replacement -->
      <copy file="pom-for-deploy.xml" tofile="build/pom.xml">
        <filterset>
          <filter token="VERSION" value="${DSTAMP}"/>
        </filterset>
      </copy>
    </sequential>
  </macrodef>
  
  <!-- deploy to maven repository -->
  <macrodef name="deploy">
    <attribute name="file"/>
    <element name="args" optional="true"/>
    <sequential>
      <exec executable="mvn" dir="build">
        <arg value="deploy:deploy-file"/>
        <arg value="-Dfile=@{file}"/>
        <arg value="-DpomFile=pom.xml"/>
        <arg value="-DrepositoryId=maven.jenkins-ci.org"/>
        <arg value="-Durl=http://maven.jenkins-ci.org:8081/content/repositories/releases" />
        <args />
      </exec>
    </sequential>
  </macrodef>

  <macrodef name="install">
    <attribute name="file"/>
    <element name="args" optional="true"/>
    <sequential>
      <exec executable="mvn" dir="build">
        <arg value="install:install-file"/>
        <arg value="-Dfile=@{file}"/>
        <arg value="-DpomFile=pom.xml"/>
        <args />
      </exec>
    </sequential>
  </macrodef>
</project>