plugins/npapi/DevModeOptions/build.xml

<?xml version="1.0" encoding="utf-8" ?>
<project name="DevModeOptions" default="prebuilt" basedir=".">
  <!-- Arguments to gwtc and devmode targets -->
  <property name="gwt.args" value="-style PRETTY" />

  <!-- Configure path to GWT SDK -->
  <property name="gwt.sdk" location="../../../build/staging/gwt-0.0.0" />

  <path id="project.class.path">
    <pathelement location="war/WEB-INF/classes"/>
    <pathelement location="${gwt.sdk}/gwt-user.jar"/>
    <fileset dir="${gwt.sdk}" includes="gwt-dev*.jar"/>
    <!-- Add any additional non-server libs (such as JUnit) -->
    <fileset dir="war/WEB-INF/lib" includes="**/*.jar"/>
  </path>

  <target name="javac" description="Compile java source to bytecode">
    <mkdir dir="war/WEB-INF/classes"/>
    <javac srcdir="java" includes="**" encoding="utf-8"
        destdir="war/WEB-INF/classes"
        source="1.5" target="1.5" nowarn="true"
        debug="true" debuglevel="lines,vars,source">
      <classpath refid="project.class.path"/>
    </javac>
    <copy todir="war/WEB-INF/classes">
      <fileset dir="java" excludes="**/*.java"/>
    </copy>
  </target>

  <target name="gwtc" depends="javac" description="GWT compile to JavaScript (production mode)">
    <java failonerror="true" fork="true" classname="com.google.gwt.dev.Compiler">
      <classpath>
        <pathelement location="java"/>
        <path refid="project.class.path"/>
      </classpath>
      <!-- add jvmarg -Xss16M or similar if you see a StackOverflowError -->
      <jvmarg value="-Xmx256M"/>
      <arg line="-war"/>
      <arg value="war"/>
      <!-- Additional arguments like -style PRETTY or -logLevel DEBUG -->
      <arg line="${gwt.args}"/>
      <arg value="com.google.gwt.devmodeoptions.DevModeOptions"/>
    </java>
  </target>

  <target name="devmode" depends="javac" description="Run development mode">
    <java failonerror="true" fork="true" classname="com.google.gwt.dev.DevMode">
      <classpath>
        <pathelement location="java"/>
        <path refid="project.class.path"/>
      </classpath>
      <jvmarg value="-Xmx256M"/>
      <arg value="-startupUrl"/>
      <arg value="DevModeOptions.html"/>
      <arg line="-war"/>
      <arg value="war"/>
      <!-- Additional arguments like -style PRETTY or -logLevel DEBUG -->
      <arg line="${gwt.args}"/>
      <arg value="com.google.devmodeoptions"/>
    </java>
  </target>

  <target name="build" depends="gwtc" description="Build this project">
  </target>

  <target name="war" depends="build" description="Create a war file">
    <zip destfile="DevModeOptions.war" basedir="war"/>
  </target>

  <target name="clean" depends="clean-prebuilt" description="Cleans this project">
    <delete dir="war/WEB-INF/classes" failonerror="false" />
    <delete dir="war/DevModeOptions" failonerror="false" />
  </target>

  <target name="clean-prebuilt" description="Clean the prebuilt copy">
    <delete file="../prebuilt/gwt-dev-plugin/DevModeOptions.html" />
    <delete dir="../prebuilt/gwt-dev-plugin/DevModeOptions" />
  </target>

  <target name="prebuilt" depends="build,clean-prebuilt" description="Copy compiled files into
    the prebuilt crx directory">
    <copy todir="../prebuilt/gwt-dev-plugin/DevModeOptions">
      <fileset dir="war/DevModeOptions" excludes="**/*.java"/>
    </copy>
    <copy todir="../prebuilt/gwt-dev-plugin/">
      <fileset dir="war/">
        <include name="DevModeOptions.html" />
      </fileset>
    </copy>
  </target>
</project>