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taxprofiler/subworkflows/local/longread_hostremoval.nf
2022-05-03 09:34:27 +02:00

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//
// Remove host reads via alignment and export off-target reads
//
include { MINIMAP2_INDEX } from '../../modules/nf-core/modules/minimap2/index/main'
include { MINIMAP2_ALIGN } from '../../modules/nf-core/modules/minimap2/align/main'
include { SAMTOOLS_VIEW } from '../../modules/nf-core/modules/samtools/view/main'
include { SAMTOOLS_BAM2FQ } from '../../modules/nf-core/modules/samtools/bam2fq/main'
workflow LONGREAD_HOSTREMOVAL {
take:
reads // [ [ meta ], [ reads ] ]
reference // /path/to/fasta
index // /path/to/index
main:
ch_versions = Channel.empty()
ch_multiqc_files = Channel.empty()
if ( !params.longread_hostremoval_index ) {
ch_minimap2_index = MINIMAP2_INDEX ( reference ).index
ch_versions = ch_versions.mix( MINIMAP2_INDEX.out.versions )
} else {
ch_minimap2_index = index
}
MINIMAP2_ALIGN ( reads, ch_minimap2_index, true, false, false )
ch_versions = ch_versions.mix( MINIMAP2_ALIGN.out.versions.first() )
ch_minimap2_mapped = MINIMAP2_ALIGN.out.bam
.map {
meta, reads ->
[ meta, reads, [] ]
}
SAMTOOLS_VIEW ( ch_minimap2_mapped , [] )
ch_versions = ch_versions.mix( SAMTOOLS_VIEW.out.versions.first() )
SAMTOOLS_BAM2FQ ( SAMTOOLS_VIEW.out.bam, false )
ch_versions = ch_versions.mix( SAMTOOLS_BAM2FQ.out.versions.first() )
emit:
reads = SAMTOOLS_BAM2FQ.out.reads // channel: [ val(meta), [ reads ] ]
versions = ch_versions // channel: [ versions.yml ]
}