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Draft: Add feature for sample demultiplexing followed by immune profiling #365

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@herpov herpov commented Aug 16, 2024

PR checklist

  • This comment contains a description of changes (with reason).
  • If you've fixed a bug or added code that should be tested, add tests!
  • If you've added a new tool - have you followed the pipeline conventions in the contribution docs
  • If necessary, also make a PR on the nf-core/scrnaseq branch on the nf-core/test-datasets repository.
  • Make sure your code lints (nf-core lint).
  • Ensure the test suite passes (nextflow run . -profile test,docker --outdir <OUTDIR>).
  • Check for unexpected warnings in debug mode (nextflow run . -profile debug,test,docker --outdir <OUTDIR>).
  • Usage Documentation in docs/usage.md is updated.
  • Output Documentation in docs/output.md is updated.
  • CHANGELOG.md is updated.
  • README.md is updated (including new tool citations and authors/contributors).

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I have made several changes to this script, but idk if I should make a PR for the module itself?

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The changes you made seem pretty specific to your use-case, so it doesn't make sense to update the central module.
It is also not allows to change modules in a pipeline (-> linting error).

The preferred way would be to make it somehow work with the nf-core module unchanged. If this is not possible, you can make a copy of the module in the "local" folder and adapt it as needed.

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@grst now the changes are minimal to this module. The rest I could fix by manipulating the output channel. Should I make a PR for bamtofastq or should I still just move this to "local" dir?

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Should I make a PR for bamtofastq

Yes please, the changes look like everyone will benefit from them.

bamtofastq \\
$args \\
$bam \\
$prefix
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Changed the output path from ${prefix}.fastq.gz.

bamtofastq generates a directory containing two folders: one for GEX and one for CMO .fastq files.
The two folders are prefixed with the .bam prefix.
All files are automatically prefixed with bamtofastq.

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The changes you made seem pretty specific to your use-case, so it doesn't make sense to update the central module.
It is also not allows to change modules in a pipeline (-> linting error).

The preferred way would be to make it somehow work with the nf-core module unchanged. If this is not possible, you can make a copy of the module in the "local" folder and adapt it as needed.

include { CELLRANGER_MKVDJREF } from "../../modules/nf-core/cellranger/mkvdjref/main.nf"

// Define workflow to subset and index a genome region fasta file
workflow CELLRANGER_MULTI_REF {
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Please make sure the workflow name and filename match.

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Do you accept the new name of the file?
cellrangermulti_ref.nf

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nf-core lint overall result: Passed ✅ ⚠️

Posted for pipeline commit 0132d9b

+| ✅ 205 tests passed       |+
#| ❔   4 tests were ignored |#
!| ❗   3 tests had warnings |!

❗ Test warnings:

  • pipeline_todos - TODO string in main.nf: Optionally add in-text citation tools to this list.
  • pipeline_todos - TODO string in main.nf: Optionally add bibliographic entries to this list.
  • pipeline_todos - TODO string in main.nf: Only uncomment below if logic in toolCitationText/toolBibliographyText has been filled!

❔ Tests ignored:

✅ Tests passed:

Run details

  • nf-core/tools version 2.14.1
  • Run at 2024-08-20 07:48:34

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grst commented Aug 20, 2024

@grst is this a 10x thing or is it an issue of how nextflow stages the files? Cellranger does not require all files to have the same prefix, ie fastq_id. I'd like some guidance to how I can debug this.

How nextflow stages the files you can check by investigating the process work directory. I haven't worked much wich cellranger multi, but cellranger is pretty strict about the filenames. They need to follow the {sample_name}_S{i}_L00{j}_{R1,R2}_001.fastq.gz convention or they won't be found.

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herpov commented Aug 27, 2024

@grst is this a 10x thing or is it an issue of how nextflow stages the files? Cellranger does not require all files to have the same prefix, ie fastq_id. I'd like some guidance to how I can debug this.

How nextflow stages the files you can check by investigating the process work directory. I haven't worked much wich cellranger multi, but cellranger is pretty strict about the filenames. They need to follow the {sample_name}_S{i}_L00{j}_{R1,R2}_001.fastq.gz convention or they won't be found.

I realized the workflow renamed the files according to the GEX sample name, so I had to ensure that the IDs of the VDJ and AB channels were consistent with the demultiplexed GEX IDs.

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herpov commented Sep 4, 2024

I have not tested the pipeline with frna data. Further, I had to exclude the sample containing probe barcodes from my test set, ie: 4PLEX_HUMAN from assets/cellranger_barcodes_samplesheet.csv. I have not further investigated the reason for failure.
I have been testing the workflow with the linked metadata.

When I tried including another dataset which had been hashed with the same cmo as one of the others I ran into this error:

Screenshot 2024-08-30 at 15 26 45

When running the pipeline separately on the dataset which failed, I had no issues. I have not spent more time trying to work around it, because I don't expect it to be an issue in our use case and, probably, it is a rare event - but thought you'd like to know.

samplesheet.csv
fb_reference.csv
cmo.csv
barcodes_samplesheet.csv

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