Add lofreq

CHANGELOG.md

@@ -19,6 +19,10 @@
 
 * `pear`: Paired-end read merger (PR #10).
 
+* `lofreq/call`: Call variants from a BAM file (PR #17).
+
+* `lofreq/indelqual`: Insert indel qualities into BAM file (PR #17).
+
 ## MAJOR CHANGES
 
 ## MINOR CHANGES

src/lofreq/call/config.vsh.yaml

@@ -0,0 +1,251 @@
+functionality:
+  name: lofreq_call
+  namespace: lofreq
+  description: |
+    Call variants from a BAM file.
+
+    LoFreq* (i.e. LoFreq version 2) is a fast and sensitive variant-caller for inferring SNVs and indels from next-generation sequencing data. It makes full use of base-call qualities and other sources of errors inherent in sequencing (e.g. mapping or base/indel alignment uncertainty), which are usually ignored by other methods or only used for filtering.
+
+    LoFreq* can run on almost any type of aligned sequencing data (e.g. Illumina, IonTorrent or Pacbio) since no machine- or sequencing-technology dependent thresholds are used. It automatically adapts to changes in coverage and sequencing quality and can therefore be applied to a variety of data-sets e.g. viral/quasispecies, bacterial, metagenomics or somatic data.
+
+    LoFreq* is very sensitive; most notably, it is able to predict variants below the average base-call quality (i.e. sequencing error rate). Each variant call is assigned a p-value which allows for rigorous false positive control. Even though it uses no approximations or heuristics, it is very efficient due to several runtime optimizations and also provides a (pseudo-)parallel implementation. LoFreq* is generic and fast enough to be applied to high-coverage data and large genomes. On a single processor it takes a minute to analyze Dengue genome sequencing data with nearly 4000X coverage, roughly one hour to call SNVs on a 600X coverage E.coli genome and also roughly an hour to run on a 100X coverage human exome dataset.
+  info:
+    keywords: [ "variant calling", "low frequancy variant calling", "lofreq", "lofreq/call"]
+    links:
+      homepage: https://csb5.github.io/lofreq/
+      documentation: https://csb5.github.io/lofreq/commands/
+    reference: 
+      doi: 10.1093/nar/gks918
+    license: "MIT"
+  requirements:
+    commands: [ lofreq ]
+  argument_groups:
+    - name: Inputs
+      arguments:
+        - name: --input
+          type: file
+          description: |
+            Input BAM file.
+          required: true
+          example: "normal.bam"
+        - name: --input_bai
+          type: file
+          description: |
+            Index file for the input BAM file.
+          required: true
+          example: "normal.bai"
+        - name: --ref
+          alternatives: -f
+          type: file
+          description: |
+            Indexed reference fasta file (gzip supported). Default: none.
+          required: true
+          example: "reference.fasta"
+    - name: Outputs
+      arguments:
+        - name: --out
+          alternatives: -o
+          type: file
+          description: |
+            Vcf output file. Default: stdout.
+          required: true
+          direction: output
+          example: "output.vcf"
+    - name: Arguments
+      arguments:
+        - name: --region
+          alternatives: -r
+          type: string
+          description: |
+            Limit calls to this region (chrom:start-end). Default: none.
+          required: false
+          example: "chr1:1000-2000"
+        - name: --bed
+          alternatives: -l
+          type: file
+          description: |
+            List of positions (chr pos) or regions (BED). Default: none.
+          required: false
+          example: "regions.bed"
+        - name: --min_bq
+          alternatives: -q
+          type: integer
+          description: |
+            Skip any base with baseQ smaller than INT. Default: 6.
+          required: false
+          example: 6
+        - name: --min_alt_bq
+          alternatives: -Q
+          type: integer
+          description: |
+            Skip alternate bases with baseQ smaller than INT. Default: 6.
+          required: false
+          example: 6
+        - name: --def_alt_bq
+          alternatives: -R
+          type: integer
+          description: |
+            Overwrite baseQs of alternate bases (that passed bq filter) with this value (-1: use median ref-bq; 0: keep). Default: 0.
+          required: false
+          example: 0
+        - name: --min_jq
+          alternatives: -j
+          type: integer
+          description: |
+            Skip any base with joinedQ smaller than INT. Default: 0.
+          example: 0
+        - name: --min_alt_jq
+          alternatives: -J
+          type: integer
+          description: |
+            Skip alternate bases with joinedQ smaller than INT. Default: 0.
+          required: false
+          example: 0
+        - name: --def_alt_jq
+          alternatives: -K
+          type: integer
+          description: |
+            Overwrite joinedQs of alternate bases (that passed jq filter) with this value (-1: use median ref-bq; 0: keep). Default: 0.
+          required: false
+          example: 0
+        - name: --no_baq
+          alternatives: -B
+          type: boolean_true
+          description: |
+            Disable use of base-alignment quality (BAQ).
+        - name: --no_idaq
+          alternatives: -A
+          type: boolean_true
+          description: |
+            Don't use IDAQ values (NOT recommended under ANY circumstances other than debugging).
+        - name: --del_baq
+          alternatives: -D
+          type: boolean_true
+          description: |
+            Delete pre-existing BAQ values, i.e. compute even if already present in BAM.
+        - name: --no_ext_baq
+          alternatives: -e
+          type: boolean_true
+          description: |
+            Use 'normal' BAQ (samtools default) instead of extended BAQ (both computed on the fly if not already present in lb tag).
+        - name: --min_mq
+          alternatives: -m
+          type: integer
+          description: |
+            Skip reads with mapping quality smaller than INT. Default: 0.
+          required: false
+          example: 0
+        - name: --max_mq
+          alternatives: -M
+          type: integer
+          description: |
+            Cap mapping quality at INT. Default: 255.
+          required: false
+          example: 255
+        - name: --no_mq
+          alternatives: -N
+          type: boolean_true
+          description: |
+            Don't merge mapping quality in LoFreq's model.
+        - name: --call_indels
+          type: boolean_true
+          description: |
+            Enable indel calls (note: preprocess your file to include indel alignment qualities!).
+        - name: --only_indels
+          type: boolean_true
+          description: |
+            Only call indels; no SNVs.
+        - name: --src_qual
+          alternatives: -s
+          type: boolean_true
+          description: |
+            Enable computation of source quality.
+        - name: --ign_vcf
+          alternatives: -S
+          type: file
+          description: |
+            Ignore variants in this vcf file for source quality computation. Multiple files can be given separated by commas.
+          required: false
+          example: "variants.vcf"
+        - name: --def_nm_q
+          alternatives: -T
+          type: integer
+          description: |
+            If >= 0, then replace non-match base qualities with this default value. Default: -1.
+          required: false
+          example: -1
+        - name: --sig
+          alternatives: -a
+          type: double
+          description: |
+            P-Value cutoff / significance level. Default: 0.010000.
+          required: false
+          example: 0.01
+        - name: --bonf
+          alternatives: -b
+          type: string
+          description: |
+            Bonferroni factor. 'dynamic' (increase per actually performed test) or INT. Default: Dynamic.
+          required: false
+          example: "dynamic"
+        - name: --min_cov
+          alternatives: -C
+          type: integer
+          description: |
+            Test only positions having at least this coverage. Default: 1.
+            (note: without --no-default-filter default filters (incl. coverage) kick in after predictions are done).
+          required: false
+          example: 1
+        - name: --max_depth
+          alternatives: -d
+          type: integer
+          description: |
+            Cap coverage at this depth. Default: 1000000.
+          required: false
+          example: 1000000
+        - name: --illumina_13
+          type: boolean_true
+          description: |
+            Assume the quality is Illumina-1.3-1.7/ASCII+64 encoded.
+        - name: --use_orphan
+          type: boolean_true
+          description: |
+            Count anomalous read pairs (i.e. where mate is not aligned properly).
+        - name: --plp_summary_only
+          type: boolean_true
+          description: |
+            No variant calling. Just output pileup summary per column.
+        - name: --no_default_filter
+          type: boolean_true
+          description: |
+            Don't run default 'lofreq filter' automatically after calling variants.
+        - name: --force_overwrite
+          type: boolean_true
+          description: |
+            Overwrite any existing output.
+        - name: --verbose
+          type: boolean_true
+          description: |
+            Be verbose.
+        - name: --debug
+          type: boolean_true
+          description: |
+            Enable debugging.
+  resources:
+    - type: bash_script
+      path: script.sh
+  test_resources:
+    - type: bash_script
+      path: test.sh
+    - type: file
+      path: test_data
+platforms:
+  - type: docker
+    image: quay.io/biocontainers/lofreq:2.1.5--py38h794fc9e_10
+    setup:
+      - type: docker
+        run: |
+          version=$(lofreq version | grep 'version' | sed 's/version: //') && \
+          echo "lofreq: $version" > /var/software_versions.txt
+  - type: nextflow
+

src/lofreq/call/help.txt

@@ -0,0 +1,49 @@
+lofreq call: call variants from BAM file
+
+Usage: lofreq call [options] in.bam
+
+Options:
+- Reference:
+       -f | --ref FILE              Indexed reference fasta file (gzip supported) [null]
+- Output:
+       -o | --out FILE              Vcf output file [- = stdout]
+- Regions:
+       -r | --region STR            Limit calls to this region (chrom:start-end) [null]
+       -l | --bed FILE              List of positions (chr pos) or regions (BED) [null]
+- Base-call quality:
+       -q | --min-bq INT            Skip any base with baseQ smaller than INT [6]
+       -Q | --min-alt-bq INT        Skip alternate bases with baseQ smaller than INT [6]
+       -R | --def-alt-bq INT        Overwrite baseQs of alternate bases (that passed bq filter) with this value (-1: use median ref-bq; 0: keep) [0]
+       -j | --min-jq INT            Skip any base with joinedQ smaller than INT [0]
+       -J | --min-alt-jq INT        Skip alternate bases with joinedQ smaller than INT [0]
+       -K | --def-alt-jq INT        Overwrite joinedQs of alternate bases (that passed jq filter) with this value (-1: use median ref-bq; 0: keep) [0]
+- Base-alignment (BAQ) and indel-aligment (IDAQ) qualities:
+       -B | --no-baq                Disable use of base-alignment quality (BAQ)
+       -A | --no-idaq               Don't use IDAQ values (NOT recommended under ANY circumstances other than debugging)
+       -D | --del-baq               Delete pre-existing BAQ values, i.e. compute even if already present in BAM
+       -e | --no-ext-baq            Use 'normal' BAQ (samtools default) instead of extended BAQ (both computed on the fly if not already present in lb tag)
+- Mapping quality:
+       -m | --min-mq INT            Skip reads with mapping quality smaller than INT [0]
+       -M | --max-mq INT            Cap mapping quality at INT [255]
+       -N | --no-mq                 Don't merge mapping quality in LoFreq's model
+- Indels:
+            --call-indels           Enable indel calls (note: preprocess your file to include indel alignment qualities!)
+            --only-indels           Only call indels; no SNVs
+- Source quality:
+       -s | --src-qual              Enable computation of source quality
+       -S | --ign-vcf FILE          Ignore variants in this vcf file for source quality computation. Multiple files can be given separated by commas
+       -T | --def-nm-q INT          If >= 0, then replace non-match base qualities with this default value [-1]
+- P-values:
+       -a | --sig                   P-Value cutoff / significance level [0.010000]
+       -b | --bonf                  Bonferroni factor. 'dynamic' (increase per actually performed test) or INT ['dynamic']
+- Misc.:
+       -C | --min-cov INT           Test only positions having at least this coverage [1]
+                                    (note: without --no-default-filter default filters (incl. coverage) kick in after predictions are done)
+       -d | --max-depth INT         Cap coverage at this depth [1000000]
+            --illumina-1.3          Assume the quality is Illumina-1.3-1.7/ASCII+64 encoded
+            --use-orphan            Count anomalous read pairs (i.e. where mate is not aligned properly)
+            --plp-summary-only      No variant calling. Just output pileup summary per column
+            --no-default-filter     Don't run default 'lofreq filter' automatically after calling variants
+            --force-overwrite       Overwrite any existing output
+            --verbose               Be verbose
+            --debug                 Enable debugging

src/lofreq/call/script.sh

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+## VIASH START
+## VIASH END
+
+# Unset all parameters that are set to "false"
+[[ "$par_no_baq" == "false" ]] && unset par_no_baq
+[[ "$par_no_idaq" == "false" ]] && unset par_no_idaq
+[[ "$par_del_baq" == "false" ]] && unset par_del_baq
+[[ "$par_no_ext_baq" == "false" ]] && unset par_no_ext_baq
+[[ "$par_no_mq" == "false" ]] && unset par_no_mq
+[[ "$par_call_indels" == "false" ]] && unset par_call_indels
+[[ "$par_only_indels" == "false" ]] && unset par_only_indels
+[[ "$par_src_qual" == "false" ]] && unset par_src_qual
+[[ "$par_illumina_13" == "false" ]] && unset par_illumina_13
+[[ "$par_use_orphan" == "false" ]] && unset par_use_orphan
+[[ "$par_plp_summary_only" == "false" ]] && unset par_plp_summary_only
+[[ "$par_no_default_filter" == "false" ]] && unset par_no_default_filter
+[[ "$par_force_overwrite" == "false" ]] && unset par_force_overwrite
+[[ "$par_verbose" == "false" ]] && unset par_verbose
+[[ "$par_debug" == "false" ]] && unset par_debug
+
+# Run lofreq call
+lofreq call \
+  -f "$par_ref" \
+  -o "$par_out" \
+  ${par_region:+-r "${par_region}"} \
+  ${par_bed:+-l "${par_bed}"} \
+  ${par_min_bq:+-q "${par_min_bq}"} \
+  ${par_min_alt_bq:+-Q "${par_min_alt_bq}"} \
+  ${par_def_alt_bq:+-R "${par_def_alt_bq}"} \
+  ${par_min_jq:+-j "${par_min_jq}"} \
+  ${par_alt_jq:+-K "${par_alt_jq}"} \
+  ${par_no_baq:+-B} \
+  ${par_no_idaq:+-A} \
+  ${par_del_baq:+-D} \
+  ${par_no_ext_baq:+-e} \
+  ${par_min_mq:+-m "${par_min_mq}"} \
+  ${par_max_mq:+-M "${par_max_mq}"} \
+  ${par_no_mq:+-N} \
+  ${par_call_indels:+--call-indels} \
+  ${par_only_indels:+--only-indels} \
+  ${par_src_qual:+-s} \
+  ${par_ign_vcf:+-S "${par_ign_vcf}"} \
+  ${par_def_nm_q:+-T "${par_def_nm_q}"} \
+  ${par_sig:+-a "${par_sig}"} \
+  ${par_bonf:+-b "${par_bonf}"} \
+  ${par_min_cov:+-C "${par_min_cov}"} \
+  ${par_max_depth:+-d "${par_max_depth}"} \
+  ${par_illumina_13:+--illumina-1.3} \
+  ${par_use_orphan:+--use-orphan} \
+  ${par_plp_summary_only:+--plp-summary-only} \
+  ${par_no_default_filter:+--no-default-filter} \
+  ${par_force_overwrite:+--force-overwrite} \
+  ${par_verbose:+--verbose} \
+  ${par_debug:+--debug} \
+  "$par_input"

src/lofreq/call/test.sh

@@ -0,0 +1,20 @@
+#!/bin/bash
+
+set -e
+
+dir_in="${meta_resources_dir%/}/test_data"
+
+echo "> Run lofreq call"
+"$meta_executable" \
+  --input "$dir_in/a.bam" \
+  --input_bai "$dir_in/a.bai" \
+  --ref "$dir_in/genome.fasta" \
+  --out "output.vcf" \
+
+echo ">> Checking output"
+[ ! -f "output.vcf" ] && echo "Output file output.vcf does not exist" && exit 1
+
+echo ">> Check if output is empty"
+[ ! -s "output.vcf" ] && echo "Output file output.vcf is empty" && exit 1
+
+echo "> Test successful"