Java/Ant/Environment

Environment: ant home, OS and Processor

   <source lang="java">

<?xml version="1.0"?> <project name="Apache Ant Properties Project" default="properties.environment" basedir=".">

 <target name="properties.environment">
   <property environment="env"/>
   <echo message="Built on: ${env.OS} ${env.PROCESSOR_ARCHITECTURE}"/>
   <echo message="ANT_HOME: ${env.ant_home}"/>
 </target>

</project>

      </source>
   
  
 
  

Get environment variables

   <source lang="java">

<?xml version="1.0"?> <project name="Template Buildfile" default="compile" basedir=".">

 <property name="dir.src" value="src"/>
 <property name="dir.build" value="build"/>
 <property environment="env"/>
 
 <target name="checkProperties">
   <fail unless="env.TOMCAT_HOME">TOMCAT_HOME must be set</fail>
   <fail unless="env.JUNIT_HOME">JUNIT_HOME must be set</fail>
   <fail unless="env.JBOSS_HOME">JBOSS_HOME must be set</fail>
 </target>
 
 <target name="prepare" depends="checkProperties">
   <mkdir dir="${dir.build}"/>
 </target>
 <target name="clean"
         description="Remove all generated files.">
   <delete dir="${dir.build}"/>
 </target>
 <target name="compile" depends="prepare"
         description="Compile all source code.">
   <echo>Compile code...</echo>
 </target>

</project>

      </source>
   
  
 
  

Set system properties in Ant build script

   <source lang="java">

public class ShowProps {

   public static void main(String[] args) {
       System.out.println("Now in ShowProps class...");
       System.out.println("prop1     = " + System.getProperty("prop1"));
       System.out.println("prop2     = " + System.getProperty("prop2"));
       System.out.println("prop3     = " + System.getProperty("prop3"));
       System.out.println("user.home = " + System.getProperty("user.home"));
   }

}

---

File: build.xml <?xml version="1.0"?> <project name="sysprops" default="run" basedir=".">

 <property name="prop1" value="Property 1 from Buildfile"/>
 <property name="prop2" value="Property 2 from Buildfile"/>
 <target name="clean">
   <delete dir="com"/>
 </target>
 <target name="compile">
   <javac srcdir="." destdir=".">
     <classpath path="."/>
   </javac>
 </target>
 <target name="run" depends="compile">
   <echo message="Now in buildfile..."/>
   <echo message="prop1     = ${prop1}"/>
   <echo message="prop2     = ${prop2}"/>
   <echo message="user.home = ${user.home}"/>
   
   <java classname="ShowProps">
     <classpath path="."/>
     
     <sysproperty key="prop1" value="${prop1}"/>
   </java>
 </target>

</project>

      </source>