A first stab ant code to build parts of an android project. See open issues in the comment.

gistfile1.xml

<?xml version="1.0" encoding="UTF-8"?>

<!--

This is very much a work in progress.

Issues:

- You have to install scala.  We aren't reusing the scala install
  embedded in scala-ide.

  It would be good to reuse the scala install in the eclipse plugins
  directory.  But maybe we don't want to depend on running eclipse.

- You have to add a definition for scala.home to local.properties.
  This should automated.

  Maybe the buildout should install scala, at which point, we know
  where it is.

- The build.xml is now in git cuz I customized it. I wonder if it's
  going to be overridden the next time I run buildout.

- I still haven't dealt with the scala library.  My builds so far have
  depended on a minified library created by the scala ide.

- I've read that proguard is critical for the scala library.

- There are bits done in the ant -compile target that I'm not doing.
  I wonder if there's a better solution than copy and paste.  I
  suspect that a work-around is to just run ant debug twice, so the
  additional steps are performed on the class files generated by
  scala.

 -->

<project name="android_scala_rules" default="debug">

  <target name="init">
    <property name="scala.lib" value="${scala.home}/lib" />

    <property name="scala.compiler"
              value="${scala.lib}/scala-compiler.jar" />
     <property name="scala.reflect"
               value="${scala.lib}/scala-reflect.jar" />
     <property name="scala.library"
               value="${scala.lib}/scala-library.jar"/>


    <path id="build.classpath">
      <pathelement location="${scala.library}"/>

      <path refid="project.javac.classpath" />
      <pathelement location="${project.target.android.jar}" />
      <pathelement location="gen" />

      <!-- <pathelement location="libs"/> -->
      <!-- <pathelement location="parts/ActionBarSherlock/library/libs/*"/> -->

      <pathelement location="${out.classes.absolute.dir}"   />
    </path>
    <taskdef resource="scala/tools/ant/antlib.xml">
      <classpath>
        <pathelement location="${scala.library}"/>
        <pathelement location="${scala.reflect}"/>
        <pathelement location="${scala.compiler}"/>
      </classpath>
    </taskdef>
  </target>


  <target name="-post-compile" depends="init">
    <mkdir dir="${out.classes.absolute.dir}"   />
    <scalac srcdir="${source.absolute.dir}"
            destdir="${out.classes.absolute.dir}"
            classpathref="build.classpath">
      <include name="**/*.scala" />
    </scalac>
  </target>

</project>