Tool processes and combines log files generated by STAR/Bowtie aligners and GEEP rpkm results file.

`get_output_filename` function returns output filename equal to `output_filename` (if input is provided) or generated on the base of STAR log basename with `.stat` extension.

Tool runs Trimgalore - the wrapper around Cutadapt and FastQC to consistently apply adapter and quality trimming to FastQ files.

`default_log_name` function returns names for generated log files (for both paired-end and single-end cases). `trim_galore` itself doesn't support setting custom names for output files.

For paired-end data processing both `input_file_pair` and `paired` should be set. If either of them is not set, the other one becomes unset automatically.

Tool runs STAR alignReads.

`default_output_name_prefix` function returns output files prefix if `outFileNamePrefix` is not set. By default prefix is equal to basename of `readFilesIn`.

Workflow converts input BAM file into bigWig and bedGraph files

Tool maps input raw reads files to reference genome using Bowtie.

`default_output_filename` function returns default name for SAM output and log files. In case when `sam` and `output_filename` inputs are not set, default filename will have `.sam` extension but format may not correspond SAM specification. To set output filename manually use `output_filename` input. Default output filename is based on `output_filename` or basename of `upstream_filelist`, `downstream_filelist` or `crossbow_filelist` file (if array, the first file in array is taken). If function is called without argenments and `output_filename` input is set, it will be returned from the function.

For single-end input data any of the `upstream_filelist` or `downstream_filelist` inputs can be used.

Log filename (`log_file` output) is generated by `default_output_filename` function with ex='.bw'

`indices_folder` defines folder to contain Bowtie indices. Based on the first found file with `rev.1.ebwt` or `rev.1.ebwtl` extension, bowtie index prefix is returned from input's `valueFrom` field.

Tool runs get_gene_n_tss.R script to group isoforms by gene and common TSS

Tool renames `source_file` to `target_filename`. Input `target_filename` should be set as string. If it's a full path, only basename will be used. If BAI file is present, it will be renamed too

Tool calculates RPKM values grouped by isoforms or genes.

`default_output_prefix` function returns default prefix based on `bam_file` basename, if `output_prefix` is not provided.

Before running `baseCommand` `bam_file` is staged into output directory with write permissions (`\"writable\": true`). This allow to automatically generate index file at the same directory as input `bam_file`. In case when index file is provided in `secondaryFiles` of `bam_file`, it's not generated twice.

Tool renames `source_file` to `target_filename`. Input `target_filename` should be set as string. If it's a full path, only basename will be used. If BAI file is present, it will be renamed too

Tool to sort and index input BAM/SAM/CRAM. If input `trigger` is set to `true` or isn't set at all (`true` is used by default), run `samtools sort` and `samtools index`, return sorted BAM and BAI/CSI index file. If input `trigger` is set to `false`, return unchanged `sort_input` (BAM/SAM/CRAM) and index (BAI/CSI, if provided in `secondaryFiles`) files, previously staged into output directory.

Before execution `baseCommand`, `sort_input` and `secondaryFiles` (if provided) are staged into directory set as docker parameter `--workdir` (tool's output directory), using `InitialWorkDirRequirement`. Setting `writable: true` makes cwl-runner to make copies of the `sort_input` and `secondaryFiles` (if provided) and mount them to docker container with `rw` mode as part of `--workdir` (if set to false, the files staged into output directory will be mounted to docker container separately with `ro` mode). Because both `samtools sort` and `samtools index` can overwrite files with the same names (and in case of `samtools sort` even the input file can be overwritten), we don't need to rename any of the staged files.

Trigger logic is implemented in two bash scripts set by default as `bash_script_sort` and `bash_script_index` inputs. For both of then, if the first argument $0 (which is `trigger` input) is true, run `samtools sort/index` with the rest of the arguments. If $0 is not true, skip `samtools sort/index` and return `sort_input` and `secondaryFiles` (if provided) staged into output directory.

Input `trigger` is Boolean, but returns String, because of `valueFrom` field. The `valueFrom` is used, because if `trigger` is false, cwl-runner doesn't append this argument at all to the the `baseCommand` - new feature of CWL v1.0.2. Alternatively, `prefix` field could be used, but it causes changing in script logic.

If using `sort_output_filename`, the output file extension should be `*.bam`, because `samtools sort` defines the output file format on the base of the file extension. If `*.sam` is sed as output filename, it cannot be usefully indexed by `samtools index`.

`default_bam` function is used to generate output filename for `samtools sort` if input `sort_output_filename` is not set or when `trigger` is false and we need to return `sort_input` and `secondaryFiles` (if provided) files staged into output directory. Output filename is generated on the base of `sort_input` basename with `.bam` extension by default.

`ext` function is used to return the index file extension (BAI/CSI) based on `csi` and `bai` inputs according to the following logic `csi` && `bai` => BAI !`csi` && !`bai ` => BAI `csi` && !`bai ` => CSI

Tool to decompress input FASTQ file Bash script's logic: - disable case sensitive glob check - check if root name of input file already include '.fastq' or '.fq' extension. If yes, set DEFAULT_EXT to \"\" - check file type, decompress if needed - return 1, if file type is not recognized This script also works of input file doesn't have any extension at all

Tool to decompress input FASTQ file Bash script's logic: - disable case sensitive glob check - check if root name of input file already include '.fastq' or '.fq' extension. If yes, set DEFAULT_EXT to \"\" - check file type, decompress if needed - return 1, if file type is not recognized This script also works of input file doesn't have any extension at all

Tool calculates statistics on the base of FASTQ file quality scores. If `output_filename` is not provided call function `default_output_filename` to return default output file name generated as `input_file` basename + `.fastxstat` extension.

Tool calculates statistics on the base of FASTQ file quality scores. If `output_filename` is not provided call function `default_output_filename` to return default output file name generated as `input_file` basename + `.fastxstat` extension.