ant task for validating and packaging videos with proper-size data block

build.scala

val fs = (new java.io.File(".")).listFiles.filter(x => x.getName.contains("asc"))
val ctx = fs.map(x => (x.getName.replace(".asc",""),scala.io.Source.fromFile(x).getLines.next))

ctx.map(i => {
  val x = i._1
  val y = i._2
  val orig = new java.io.File(x)
  val suffix = orig.getName.split('.').last
  val newf = new java.io.File(y+"."+suffix)
  orig.renameTo(newf)
})

build.xml

<project name="vo" basedir=".">
  <target name="sha1">
    <checksum algorithm="SHA-1" fileext=".asc" readbuffersize="8388806">
      <fileset dir=".">
        <filename regex="(.*)\.([Aa][Vv][Ii]|[Mm][Pp][Ee]?[Gg]|[Rr][Mm][Vv][Bb]|[Mm][Pp]4)" />
      </fileset>
    </checksum>
  </target>

  <target name="rename" depends="sha1">
    <exec executable="cmd">
      <arg value="/c"/>
      <arg value="scala build.scala"/>
    </exec>
  </target>

  <target name="package" depends="rename">
    <apply executable="C:/Program Files/7-Zip/7z">
      <arg value="a" />
      <arg value="-t7z" />
      <targetfile />
      <srcfile />
      <arg value="-mx0" />
      <arg value="-mmt" />
      <arg value="-w&quot;.&quot;" />
      <arg value="-v700m" />
      <fileset dir=".">
        <exclude name="*.asc" />
      </fileset>
      <mapper type="regexp" from="(.*)\.([Aa][Vv][Ii]|[Mm][Pp][Ee]?[Gg]|[Rr][Mm][Vv][Bb]|[Mm][Pp]4)" to="\1\.7z" />
    </apply>
  </target>

  <target name="all" depends="package" />

  <target name="clean-package">
    <delete verbose="true">
      <fileset dir="." includes="*.7z**" />
    </delete>
  </target>

  <target name="clean-checksum">
    <delete verbose="true">
      <fileset dir="." includes="*.asc**" />
    </delete>
  </target>

  <target name="dist-clean" depends="clean-package,clean-checksum" />

</project>