build.xml

<?xml version="1.0" encoding="UTF-8"?>
  <project xmlns:sf="antlib:com.salesforce" default="sf" basedir=".">
  <taskdef uri="antlib:com.salesforce" resource="com/salesforce/antlib.xml" classpath="lib/ant-salesforce.jar"/>

  <path id="ant.additions.classpath">
      <fileset dir="./lib/" includes="*.jar"/>
  </path>

  <target name="retrieve">
    <property file="retrieve.properties" />
    <echo>Removing existing metadata from src directory...</echo>
    <delete includeemptydirs="true" quiet="false">
      <fileset dir=".">
        <include name="src/**" />
        <exclude name="src/package.xml" />
      </fileset>
    </delete>
    <echo>Retrieving metadata from sandbox with user ${sf.username}...</echo>
    <sf:retrieve
      username="${sf.username}"
      password="${sf.password}"
      serverurl="${sf.serverurl}"
      maxPoll="${sf.maxPoll}"
      retrieveTarget="src"
      unpackaged="src/package.xml" />
  </target>

  <target name="build">
    <property environment="env" />
    <property file="build.properties" />
    <echo>Continuous Integration Build</echo>
    <echo>${build.cmd}</echo>
    <antcall target="${build.cmd}" />
  </target>
  
  <target name="validate">
    <echo>Validate and run local tests in Org with username: ${sf.username}</echo>
    <taskdef
        name="deployWithXmlReport"
        classname="com.salesforce.ant.DeployWithXmlReportTask"
        classpathref="ant.additions.classpath" />
    <deployWithXmlReport
        username="${sf.username}"
        password="${sf.password}"
        serverurl="${sf.serverurl}"
        maxPoll="${sf.maxPoll}"
        deployRoot="src"
        testLevel="RunLocalTests"
        junitreportdir="${build.junitreportdir}"
        pollWaitMillis="${sf.pollWaitMillis}"
        checkOnly="true" />
  </target>
  
  <target name="deployAndRunAllTests">
    <echo>Deploy and RunAllTests in Org with username: ${sf.username}</echo>
    <sf:deploy
      username="${sf.username}"
      password="${sf.password}"
      serverurl="${sf.serverurl}"
      maxPoll="${sf.maxPoll}"
      deployRoot="${user.dir}/src"
      testLevel="${sf.testLevel}" />
  </target>

  <!-- Retrieve the information of all items of a particular metadata type -->
  <target name="listMetadata">
    <property file="retrieve.properties" />
    <sf:listMetadata
      username="${sf.username}"
      password="${sf.password}"
      serverurl="${sf.serverurl}"
      metadataType="${sf.metadataType}"
      resultFilePath="metadataList.log" />
  </target>

  <!-- Retrieve the information on all supported metadata type -->
  <target name="describeMetadata">
    <property file="retrieve.properties" />
    <sf:describeMetadata
      username="${sf.username}"
      password="${sf.password}"
      serverurl="${sf.serverurl}" />
  </target>

</project>