process {

    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }
    withName: BIOBAMBAM_BAMMERGE {
        ext.args = [
            "md5=1",
            {"md5filename=${meta.id}.md5"},
            "index=1",
            {"indexfilename=${meta.id}.bam.bai"}
        ].join(" ").trim()
    }

}