process MERYL_UNIONSUM { tag "$meta.id" label 'process_low' conda (params.enable_conda ? "bioconda::meryl=1.3" : null) container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ? 'https://depot.galaxyproject.org/singularity/meryl:1.3--h87f3376_1': 'quay.io/biocontainers/meryl:1.3--h87f3376_1' }" input: tuple val(meta), path(meryl_dbs) output: tuple val(meta), path("*.unionsum.meryldb"), emit: meryl_db path "versions.yml" , emit: versions when: task.ext.when == null || task.ext.when script: def args = task.ext.args ?: '' def prefix = task.ext.prefix ?: "${meta.id}" """ meryl union-sum \\ threads=$task.cpus \\ $args \\ output ${prefix}.unionsum.meryldb \\ $meryl_dbs cat <<-END_VERSIONS > versions.yml "${task.process}": meryl: \$( meryl --version |& sed 's/meryl //' ) END_VERSIONS """ }