compile-scala/src/main/resources/compile-scala.ant

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<project name="org.apache.easyant.plugins#compile-scala" xmlns:ea="antlib:org.apache.easyant">
    <ea:core-version requiredrevision="[0.9,+]" />

    <ea:plugin module="abstract-compile" revision="0.9" />

    <target name="compile-scala:init">
        <property environment="env" />
        <ea:parameter property="src.main.scala" required="true" description="directory where sources to be compiled are" />
        <ea:parameter property="scalac.debug.mode" default="true" description="scalac debug mode, true or false" />
        <ea:parameter property="compile.scala.includes.pattern" default="**/*.scala"
            description="Pattern describing files included in compilation process" />
        <ea:parameter property="compile.scala.excludes.pattern" default=""
            description="Pattern describing files excluded in compilation process" />
        <available file="${src.main.scala}" property="has.src.main.scala" />
    </target>

    <target name="compile-scala:configure" depends="compile-scala:init,abstract-compile:compile-ready">
        <ea:findclasspath pathid="resolved.scala.classpath" organisation="org.scala-lang" module="scala-compiler"
            revision="2.9.2">
            <ea:project-dependency-strategy />
            <ea:environment-strategy env="SCALA_HOME" />
            <ea:basic-configuration-strategy />
        </ea:findclasspath>
        <taskdef resource="scala/tools/ant/antlib.xml" classpathref="resolved.scala.classpath" />

        <!-- when you specify classpath parameter to <scalac /> task it overrides class path 
        defined inside <taskdef /> rather then adds to it. So just add scala jars to your own class path.
            source http://www.softwaresecretweapons.com/jspwiki/scalatoolsnscfatalerror-object-scala-not-found -->
        <ea:path pathid="compile.main.classpath" overwrite="prepend">
            <path refid="resolved.scala.classpath" />
        </ea:path>
    </target>

    <target name="compile-scala:compile" depends="compile-scala:configure" if="has.src.main.scala" extensionOf="abstract-compile:compile">
        <mkdir dir="${target.main.classes}" />
        <scalac srcdir="${src.main.scala}" destdir="${target.main.classes}" scalacdebugging="${scalac.debug.mode}"
            classpathref="compile.main.classpath" includes="${compile.scala.includes.pattern}" excludes="${compile.scala.excludes.pattern}">
        </scalac>
    </target>
</project>