Warn when no version is specified

[ccoulombe]

TLDR

• for a specific set of modules, not all (e.g scipy-stack, python, arrow, opencv)
• warn when user load scipy-stack without pinning a version

Goals:

• Decrease the number of users, job crashes and tickets related to updated modules where one did not pin a version and got the latest by default
• Increase reproducibility of job scripts

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When we add a new version of a module like scipy-stack, it can create issues for users who do not specify a version for the module they use. Hence, some users get the latest module without realizing it and their code may break resulting in a job crash and tickets. This also hinders reproducibility of job scripts as the modules loaded may have changed.

I suggest to add a warning to a specific set of modules : scipy-stack, arrow, python, opencv, and others we judge useful, when no version is specified . Something like

$ module load scipy-stack
Please specify a version instead of relying on the default one! -> module load scipy-stack/2023a.