def VERSION = '2.2.0' // Version information not provided by tool on CLI

process HISAT2_EXTRACTSPLICESITES {
    tag "$gtf"
    label 'process_medium'

    conda (params.enable_conda ? 'bioconda::hisat2=2.2.1' : null)
    container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
        'https://depot.galaxyproject.org/singularity/hisat2:2.2.1--h1b792b2_3' :
        'quay.io/biocontainers/hisat2:2.2.1--h1b792b2_3' }"

    input:
    path gtf

    output:
    path "*.splice_sites.txt", emit: txt
    path "versions.yml"      , emit: versions

    script:
    def args = task.ext.args ?: ''
    """
    hisat2_extract_splice_sites.py $gtf > ${gtf.baseName}.splice_sites.txt
    cat <<-END_VERSIONS > versions.yml
    "${task.process}":
        hisat2: $VERSION
    END_VERSIONS
    """
}