An example for calling ant from maven using a property file for storing values

build.xml

<project default="main">

    <target name="main">
     <echo message="This line is executed in an external build.xml for javafx version: ${javafx.version}"/>
    </target>

</project>

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>net.ladstatt.maven</groupId>
	<artifactId>example-pom-with-filtering</artifactId>
	<version>1.0.0-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>example-pom-with-filtering</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<build>
		<filters>
			<filter>props.properties</filter>
		</filters>
		<plugins>
			<!-- http://mojo.codehaus.org/properties-maven-plugin/ -->
			<plugin>
				<groupId>org.codehaus.mojo</groupId>
				<artifactId>properties-maven-plugin</artifactId>
				<version>1.0-alpha-2</version>
				<executions>
					<execution>
						<phase>validate</phase>
						<goals>
							<goal>read-project-properties</goal>
						</goals>
						<configuration>
							<files>
								<file>props.properties</file>
							</files>
						</configuration>
					</execution>
				</executions>
			</plugin>
			<plugin>
				<artifactId>maven-antrun-plugin</artifactId>
				<version>1.7</version>
				<executions>
					<execution>
						<phase>package</phase>
						<configuration>
							<target>
								<!-- Place any Ant task here. You can add anything you can add between 
									<target> and </target> in a build.xml. -->
								<property name="a.version" value="${a.version}" />
								<ant antfile="build.xml" />
								<echo
									message="This is ant called from maven for and providing a version number from a property file ${a.version}" />
							</target>
						</configuration>
						<goals>
							<goal>run</goal>
						</goals>
					</execution>
				</executions>
			</plugin>
		</plugins>
	</build>
	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.10</version>
		</dependency>
	</dependencies>
</project>

props.properties

a.version=1.0

Thanks for this - couldn't quite figure out how to do this with the ant-run plugin.