cat2.xml

cat2.xml

<tool id="cat2" name="Concatenate datasets">
    <command interpreter="python">
        catWrapper.py 
        $out_file1 
        $cond1.input1
    </command>
    <inputs>
        <conditional name="cond1">
          <param name="datatype" type="select" label="Input Type">
            <option value="txt">Text</option>
            <option value="tabular">Tabular</option>
            <option value="data">Data</option>
            <option value="bam">Bam</option>
          </param>
          <when value="txt">
            <param name="input1" type="data" format="txt" label="Concatenate Dataset" />
          </when>
          <when value="tabular">
            <param name="input1" type="data" format="tabular" label="Concatenate Dataset" />
          </when>
          <when value="data">
            <param name="input1" type="data" label="Concatenate Dataset" />
          </when>
          <when value="bam">
            <param name="input1" type="data" format="bam" label="Concatenate Dataset" />
          </when>
        </conditional>
    </inputs>
    <outputs>
        <data name="out_file1" format="input" metadata_source="input1"/>
    </outputs>
</tool>