<tool id="catdc" name="Concatenate datasets (in docker)">
    <description>tail-to-head</description>
    <requirements>
      <container type="docker">busybox:ubuntu-12.04</container>
    </requirements>
    <command>
      echo "Galaxy slots passed through contain as \$GALAXY_SLOTS";
      cat $input1
      #for $q in $queries
            ${q.input2}
      #end for
      &gt; $out_file1;
      echo "Work dir output" &gt; working_file

    </command>
    <inputs>
        <param name="input1" type="data" label="Concatenate Dataset"/>
        <repeat name="queries" title="Dataset">
            <param name="input2" type="data" label="Select" />
        </repeat>
    </inputs>
    <outputs>
        <data name="out_file1" format="input" metadata_source="input1"/>
        <data name="out_file2" format="txt" from_work_dir="working_file" />
    </outputs>
    <help>
    </help>
</tool>