process GUNC_DOWNLOADDB {
    tag "$db_name"
    label 'process_single'

    conda (params.enable_conda ? "bioconda::gunc=1.0.5" : null)
    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
        'https://depot.galaxyproject.org/singularity/gunc:1.0.5--pyhdfd78af_0' :
        'quay.io/biocontainers/gunc:1.0.5--pyhdfd78af_0' }"

    input:
    val db_name

    output:
    path "*.dmnd"       , emit: db
    path "versions.yml" , emit: versions

    when:
    task.ext.when == null || task.ext.when

    script:
    def args = task.ext.args ?: ''
    """
    gunc download_db . -db $db_name $args

    cat <<-END_VERSIONS > versions.yml
    "${task.process}":
        gunc: \$( gunc --version )
    END_VERSIONS
    """
}