Add bandage image module

software/bandage/image/functions.nf

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+/*
+ * -----------------------------------------------------
+ *  Utility functions used in nf-core DSL2 module files
+ * -----------------------------------------------------
+ */
+
+/*
+ * Extract name of software tool from process name using $task.process
+ */
+def getSoftwareName(task_process) {
+    return task_process.tokenize(':')[-1].tokenize('_')[0].toLowerCase()
+}
+
+/*
+ * Function to initialise default values and to generate a Groovy Map of available options for nf-core modules
+ */
+def initOptions(Map args) {
+    def Map options = [:]
+    options.args          = args.args ?: ''
+    options.args2         = args.args2 ?: ''
+    options.publish_by_id = args.publish_by_id ?: false
+    options.publish_dir   = args.publish_dir ?: ''
+    options.publish_files = args.publish_files
+    options.suffix        = args.suffix ?: ''
+    return options
+}
+
+/*
+ * Tidy up and join elements of a list to return a path string
+ */
+def getPathFromList(path_list) {
+    def paths = path_list.findAll { item -> !item?.trim().isEmpty() }  // Remove empty entries
+    paths = paths.collect { it.trim().replaceAll("^[/]+|[/]+\$", "") } // Trim whitespace and trailing slashes
+    return paths.join('/')
+}
+
+/*
+ * Function to save/publish module results
+ */
+def saveFiles(Map args) {
+    if (!args.filename.endsWith('.version.txt')) {
+        def ioptions = initOptions(args.options)
+        def path_list = [ ioptions.publish_dir ?: args.publish_dir ]
+        if (ioptions.publish_by_id) {
+            path_list.add(args.publish_id)
+        }
+        if (ioptions.publish_files instanceof Map) {
+            for (ext in ioptions.publish_files) {
+                if (args.filename.endsWith(ext.key)) {
+                    def ext_list = path_list.collect()
+                    ext_list.add(ext.value)
+                    return "${getPathFromList(ext_list)}/$args.filename"
+                }
+            }
+        } else if (ioptions.publish_files == null) {
+            return "${getPathFromList(path_list)}/$args.filename"
+        }
+    }
+}

software/bandage/image/main.nf

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+// Import generic module functions
+include { initOptions; saveFiles; getSoftwareName } from './functions'
+
+params.options = [:]
+def options    = initOptions(params.options)
+
+process BANDAGE_IMAGE {
+    tag "${meta.id}"
+    label 'process_low'
+    publishDir "${params.outdir}",
+        mode: params.publish_dir_mode,
+        saveAs: { filename -> saveFiles(filename:filename, options:params.options, publish_dir:getSoftwareName(task.process), publish_id:meta.id) }
+
+    conda (params.enable_conda ? 'bioconda::bandage=0.8.1' : null)
+    if (workflow.containerEngine == 'singularity' && !params.singularity_pull_docker_container) {
+        container "https://depot.galaxyproject.org/singularity/bandage:0.8.1--hc9558a2_2"
+    } else {
+        container "quay.io/biocontainers/bandage:0.8.1--hc9558a2_2"
+    }
+
+    input:
+    tuple val(meta), path(gfa)
+    
+    output:
+    tuple val(meta), path('*.png'), emit: png
+    tuple val(meta), path('*.svg'), emit: svg
+    path  '*.version.txt'         , emit: version
+    
+    script:
+    def software = getSoftwareName(task.process)
+    def prefix   = options.suffix ? "${meta.id}${options.suffix}" : "${meta.id}"
+    """
+    Bandage image $gfa ${prefix}.png $options.args
+    Bandage image $gfa ${prefix}.svg $options.args
+    
+    echo \$(Bandage --version 2>&1) | sed 's/^.*Version: //; s/ .*\$//' > ${software}.version.txt
+    """
+}

software/bandage/image/meta.yml

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+name: bandage_image
+description: Render an assembly graph in GFA 1.0 format to PNG and SVG image formats
+keywords:
+    - gfa
+    - graph
+    - assembly
+    - visualisation
+tools:
+    - bandage:
+        description: |
+            Bandage - a Bioinformatics Application for Navigating De novo Assembly Graphs Easily
+        homepage: https://github.com/rrwick/Bandage
+        documentation: https://github.com/rrwick/Bandage
+params:
+    - outdir:
+        type: string
+        description: |
+            The pipeline's output directory. By default, the module will
+            output files into `$params.outdir/<SOFTWARE>`
+    - publish_dir_mode:
+        type: string
+        description: |
+            Value for the Nextflow `publishDir` mode parameter.
+            Available: symlink, rellink, link, copy, copyNoFollow, move.
+    - enable_conda:
+        type: boolean
+        description: |
+            Run the module with Conda using the software specified
+            via the `conda` directive
+    - singularity_pull_docker_container:
+        type: boolean
+        description: |
+            Instead of directly downloading Singularity images for use with Singularity,
+            force the workflow to pull and convert Docker containers instead.
+input:
+    - meta:
+        type: map
+        description: |
+            Groovy Map containing sample information
+            e.g. [ id:'test', single_end:false ]
+    - gfa:
+        type: file
+        description: Assembly graph in GFA 1.0 format
+        pattern: "*.gfa"
+output:
+    - meta:
+        type: map
+        description: |
+            Groovy Map containing sample information
+            e.g. [ id:'test', single_end:false ]
+    - png:
+        type: file
+        description: Bandage image in PNG format
+        pattern: "*.png"
+    - svg:
+        type: file
+        description: Bandage image in SVG format
+        pattern: "*.svg"
+    - version:
+        type: file
+        description: File containing software version
+        pattern: "*.{version.txt}"
+authors:
+    - "@heuermh"

tests/software/bandage/image/main.nf

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+#!/usr/bin/env nextflow
+
+nextflow.enable.dsl = 2
+
+include { BANDAGE_IMAGE } from '../../../../software/bandage/image/main.nf' addParams( options: [:] )
+
+workflow test_bandage_image {
+
+    def input = []
+    input = [ [ id:'B-3106' ], // meta map
+              [ file("${launchDir}/tests/data/gfa/B-3106.gfa", checkIfExists: true) ] ]
+
+    BANDAGE_IMAGE ( input )
+}

tests/software/bandage/image/test.yml

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+- name: bandage image
+  command: nextflow run ./tests/software/bandage/image -entry test_bandage_image -c tests/config/nextflow.config
+  tags:
+    - bandage
+    - bandage_image
+  files:
+    - path: output/bandage/B-3106.png
+      should_exist: true
+    - path: output/bandage/B-3106.svg
+      should_exist: true