feat: Allow the environment variable SNAKEMAKE_CONDA_PREFIX to be present without --use-conda #2263
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Description
SNAKEMAKE_CONDA_PREFIX is a great tool for shared computing environments and I am encouraging everyone in our lab to set it in their
.bashrc
it to help with the number of conda builds we have and reduce file usage. However, there is one downside and that is it becomes impossible to run a non conda snakemake without clearing the environment variable because the lack of--use-conda
will force snakemake to exit.In this PR I suggest a quality of life improvement. Instead of having snakemake error out, it will instead warn that the environment variable is set but conda environments will not be used or built because
--use-conda
is not set. Note, this will only happen when the environment variable is set and not when it is passed as a command line argument.Thanks for considering!
QC
docs/
) is updated to reflect the changes or this is not necessary (e.g. if the change does neither modify the language nor the behavior or functionalities of Snakemake).