gistfile1.xml

    <target name="init" depends="-set-release-mode, -build-setup">
      <property
        name="scala-library.jar"
        value="${scala.dir}/lib/scala-library.jar"
       />
      <path id="build.classpath">
        <pathelement location="${scala-library.jar}"   />
        <!--<pathelement location="${your.path}"   />-->
        <pathelement location="${build.dir}"   />
      </path>
      <taskdef resource="scala/tools/ant/antlib.xml">
        <classpath>
          <pathelement location="${scala.dir}/lib/scala-compiler.jar"   />
          <!-- NEW: For scala 2.10.2 you need scala-reflect: -->
          <pathelement location="${scala.dir}/lib/scala-reflect.jar"   />
          <pathelement location="${scala-library.jar}"   />
        </classpath>
      </taskdef>
    </target>
    <target name="scalac" depends="init">
      <path id="scalac.classpath"> 
        <path path="${java.compiler.classpath}" /> 
        <path path="${scala-library.jar}"/>
        <path path="${out.classes.absolute.dir}" />
        <path refid="project.all.jars.path" />
        <path refid="tested.project.classpath" />
        <path path="${java.compiler.classpath}" />
      </path>
      <path id="scala.srcpath">
        <path path="${source.absolute.dir}" />
        <path path="${gen.absolute.dir}" />
      </path>
      <scalac 
          srcdir="${source.dir}" 
          destdir="${out.classes.absolute.dir}"
          classpathref="scalac.classpath"
          sourcepathref="scala.srcpath"
          bootclasspathref="project.target.class.path"
          force="changed">
          <!-- addparams="-Yclosure-elim -optimise" -->
          <classpath>
            <fileset dir="${jar.libs.absolute.dir}" includes="*.jar" />
          </classpath>
        <include name="**/*.scala"/>
      </scalac>
    </target>
    <target name="-pre-compile" depends="scalac"/>
<!--    <target name="-debug-obfuscation-check">
      <property name="proguard.enabled" value="true"/>
    </target> -->

  <!-- Custom targets -->
  <target name="-custom-git-version">
    <exec executable="sh" outputproperty="git.commits">
      <arg value="-c" />
      <arg value="git rev-parse HEAD" />
    </exec>
    <echo>git.commits: ${git.commits}</echo>
  </target>

  <target name="-custom-manifest-version" depends="-custom-git-version">
   <echo>Creating backup of AndroidManifest.xml</echo>
   <copy file="AndroidManifest.xml" tofile="AndroidManifest.xml.antbak" preservelastmodified="true" />
   <replaceregexp
      file="AndroidManifest.xml"
      match='android:versionName=".*"'
      replace='android:versionName="2.1.0.${git.commits}"' />
  </target>

  <target name="-pre-build" depends="-custom-manifest-version"/>