Building GWT with Ant

build.properties 

gwt.path=c:/gwt-windows-1.7.1
build.dir=c:/build


build.xml

<project name="projectname" default="compile-all" basedir=".">
    <property file="build.properties"/>

    <property name="war.name" value="projectname.war"/>
    <property name="gwt.module.name" value="com.projectname.Main"/>

    <property name="proj.web-inf.dir" value="${basedir}/WebContent/WEB-INF"/>
    <property name="proj.src.dir" value="${basedir}/src"/>
    <property name="proj.lib.dir" value="${proj.web-inf.dir}/lib"/>

    <property name="build.deploy.dir" value="${build.dir}"/>
    <property name="build.deploy.classes.dir" value="${build.deploy.dir}/${gwt.module.name}/WEB-INF/classes"/>

    <path id="classpath">
        <pathelement location="${gwt.path}/gwt-user.jar"/>
        <pathelement location="${gwt.path}/gwt-dev-windows.jar"/>
        <pathelement location="${proj.src.dir}"/>
        <fileset dir="${proj.lib.dir}">
            <include name="**/*.jar"/>
        </fileset>
    </path>

    <target name="init">
        <echo message="=========================================="/>
        <echo message="OS Name: ${os.name}                       "/>
        <echo message="Java Home: ${java.home}                   "/>
        <echo message="Ant java version: ${ant.java.version}     "/>
        <echo message="Java vendor: ${java.vendor}               "/>
        <echo message="Java Version: ${java.version}             "/>
        <echo message="=========================================="/>
    </target>

    <target name="clean-deploy">
        <delete dir="${build.deploy.dir}/${gwt.module.name}"/>
        <delete dir="${build.deploy.dir}/${gwt.module.name}-aux"/>
        <delete dir="${build.deploy.dir}/${war.name}"/>
    </target>

    <target name="compile-to-js" depends="init" description="Compiles client code and generates relevent JavaScripts">

        <java classname="com.google.gwt.dev.GWTCompiler" fork="true">

            <classpath refid="classpath"/>
            <jvmarg value="-Xmx1G" />
            <jvmarg value="-Xss1024k"/>
            <jvmarg value="-Xms64M"/>
            <jvmarg value="-Dgwt.nowarn.legacy.tools"/>
            <arg value="-out"/>
            <arg value="${build.deploy.dir}"/>
            <arg value="-localWorkers"/>
            <arg value="5"/>
            <arg value="${gwt.module.name}"/>

            <arg value="-style"/>
            <arg value="pretty"/>

        </java>

        <delete dir="${build.deploy.dir}/${gwt.module.name}-aux"/>

    </target>

    <target name="compile">

        <echo message="=========================================="/>
        <echo message="Compiling source files…                 "/>
        <echo message="=========================================="/>

        <mkdir dir="${build.deploy.classes.dir}"/>

        <javac destdir="${build.deploy.classes.dir}"
               excludes="**/client/*.java"
               classpathref="classpath"
               verbose="off"
               debug="on"
               deprecation="false">
            <src path="${proj.src.dir}"/>
        </javac>

        <echo message="=========================================="/>
        <echo message="Copying application files…                   "/>
        <echo message="=========================================="/>

        <copy todir="${build.deploy.classes.dir}">
            <fileset dir="${proj.src.dir}" includes="**/*.xml"/>
            <fileset dir="${proj.src.dir}" includes="**/*.properties"/>
         </copy>
    </target>

    <target name="copy-web-content" description="Copies WebContent contents to WAR">

        <echo message="=========================================="/>
        <echo message="Copying Web content files…                   "/>
        <echo message="=========================================="/>

        <copy todir="${build.deploy.dir}/${gwt.module.name}">
            <fileset dir="${basedir}/WebContent">
            </fileset>
        </copy>
    </target>




</project>