gtf option needs a dynamic default

[mvheetve]

Description of the bug

When submitting without --gtf, the pipeline throws

Oct-06 15:32:56.195 [main] DEBUG nextflow.cli.Launcher - Operation aborted
nextflow.validation.SchemaValidationException: The following invalid input values have been detected:

* --gtf (/kyukon/data/gent/shared/000/gvo00082/genomes/Hsapiens/GRCh38/seq/gencode.v48.basic.annotation.gtf): the file or directory '/kyukon/data/gent/shared/000/gvo00082/genomes/Hsapiens/GRCh38/seq/gencode.v48.basic.annotation.gtf' does not exist

Better would be to get gtf from the genome base.

Command used and terminal output

Relevant files

No response

System information

No response