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;; fastq sensitive short read SARS-CoV-2 mutation calling
(use-modules (ccwl ccwl))
(define fastq-1
(input "fastq_1"))
(define fastq-2
(input "fastq_2"))
(define bowtie2-index
(input "bowtie2_index"
#:other '((secondary-files . #(".1.bt2" ".2.bt2" ".3.bt2" ".4.bt2"
".rev.1.bt2" ".rev.2.bt2")))))
(define bwa-mem-index
(input "bwa_mem_index"
#:other '((secondary-files . #(".amb" ".ann" ".bwt" ".pac" ".sa")))))
(define reference
(input "reference"
#:other '((secondary-files . #(".fai")))))
(define (bam2vcf prefix)
(workflow (string-append prefix "_bam2vcf")
(list (pipeline "samtools"
(list (command "samtools_view"
(list "samtools" "view" "-h" "-b" "-F" "4"
(input (string-append prefix "_input"))))
(command "samtools_sort"
(list "samtools" "sort" "-n"))
(command "samtools_fixmate"
(list "samtools" "fixmate" "-m" "-" "-"))
(command "samtools_sort2"
(list "samtools" "sort" "-"))
(command "samtools_markdup"
(list "samtools" "markdup" "-" "-")
#:other '((stdout . "dedup.bam")))))
(command "samtools_index"
(list "samtools" "index" (input "samtools_stdout"))
#:outputs (list (output "indexed_dedup_bam"
#:binding '((glob . "$(inputs.samtools_stdout.basename)"))
#:other '((secondary-files . #(".bai")))))
#:other `((hints (Initial-work-dir-requirement
(listing . #("$(inputs.samtools_stdout)"))))))
(pipeline "freebayes"
(list (command "freebayes"
(list "freebayes" "--ploidy" "1"
"--bam" (input "indexed_dedup_bam"
#:other '((secondary-files . #("bai"))))
"-f" reference))
(command "bcftools_view"
(list "bcftools" "view"
"-i" "QUAL > 10"
"-Oz")
#:other `((stdout . ,(string-append prefix "_output.vcf.gz"))))))
(command "tabix"
(list "tabix" (input "freebayes_stdout"))
#:outputs (list (output "indexed_vcf"
#:binding '((glob . "$(inputs.freebayes_stdout.basename)"))
#:other '((secondary-files . #(".tbi")))))
#:other `((hints (Initial-work-dir-requirement
(listing . #("$(inputs.freebayes_stdout)")))))))
(list (output (string-append prefix "_output")
#:source "tabix/indexed_vcf"))))
(define variant-calling
(workflow "variant-calling"
(list (command "bowtie"
(list "bowtie2" "-p" "16"
"-x" bowtie2-index
"-1" fastq-1
"-2" fastq-2)
#:outputs (list (output "bowtie_input" #:type 'stdout)))
(bam2vcf "bowtie")
(command "bwa_mem"
(list "bwa" "mem" "-K" "100000000" "-v" "3" "-t" "16"
"-Y" bwa-mem-index fastq-1 fastq-2)
#:outputs (list (output "bwa_mem_input" #:type 'stdout)))
(bam2vcf "bwa_mem"))
(list (output "bowtie_output"
#:source "bowtie_bam2vcf/bowtie_output")
(output "bwa_mem_output"
#:source "bwa_mem_bam2vcf/bwa_mem_output"))))
(write-cwl variant-calling
"workflows/variant-calling-bowtie-bwa-mem.cwl")
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