Added custom/shortenfastaids

[GallVp]

PR checklist

Closes #XXX

• [x] Added custom/shortenfastaids for https://github.com/nf-core/modules/pull/4984
• [x] If you've fixed a bug or added code that should be tested, add tests!
• [x] If you've added a new tool - have you followed the module conventions in the contribution docs
• [ ] If necessary, include test data in your PR.
• [x] Remove all TODO statements.
• [x] Emit the versions.yml file.
• [x] Follow the naming conventions.
• [x] Follow the parameters requirements.
• [x] Follow the input/output options guidelines.
• [x] Add a resource label
• [x] Use BioConda and BioContainers if possible to fulfil software requirements.
• Ensure that the test works with either Docker / Singularity. Conda CI tests can be quite flaky:
  • For modules:
    • [x] nf-core modules test <MODULE> --profile docker
    • [ ] nf-core modules test <MODULE> --profile singularity
    • [ ] nf-core modules test <MODULE> --profile conda
  • For subworkflows:
    • [ ] nf-core subworkflows test <SUBWORKFLOW> --profile docker
    • [ ] nf-core subworkflows test <SUBWORKFLOW> --profile singularity
    • [ ] nf-core subworkflows test <SUBWORKFLOW> --profile conda

[mahesh-panchal]

Have you checked there are no other modules in nf-core modules that can provide this functionality?

[GallVp]

Google searches are leading me to custom scripts.

[mahesh-panchal]

What about https://www.nextflow.io/docs/latest/operator.html#splitfasta. Can this operator replace this module in the subworkflow? For example, specifically using the record: [ id: true] or perhaps text or desc are relevant. Also this can work on files too using the map operator.

[GallVp]

Replaced with Groovy code, see #4984