process {

    publishDir = { "${params.outdir}/${task.process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()}" }

    withName: BCFTOOLS_MERGE {
        ext.args = '--force-samples --no-version --output-type z'
    }

    withName: BCFTOOLS_MERGE_GVCF {
        ext.args = {"--force-samples --no-version -m none --output-type z --gvcf $fasta"}
    }

    withName: BCFTOOLS_MERGE_BCF {
        ext.args = "--force-samples --no-version --output-type b"
    }

}