Optionally exclude versions of Julia from CI/CD

[quffaro]

Our organization CI/CD tests Julia on an array of default versions, which can be overridden by the package maintainer. For example TraitInterfaces.jl and the coming Catlab refactor are not designed around Julia 1.11 and would break. Therefore it makes sense for the maintainer to use the existing parameter test_versions to pass in an argument "['1.11']" until the AlgebraicJulia CI removes 1.10 from its default testing.

Does it make sense to have an additional exclude_versions parameter where package maintainers pass in the version(s) of Julia they want to exclude?

[kris-brown]

Is it possible to add the ability to exclude operating systems? Because nauty doesn't work with Windows any code which uses that will not work for windows.

[jpfairbanks]

The answer there is to use the Julia platform detection in the library and with the following techniques

https://docs.julialang.org/en/v1/manual/handling-operating-system-variation/ Handling Operating System Variation · The Julia Language

and print an error message on windows instead of failing. The tests then need to be wrapped in a similar logic to avoid running on the wrong platform. Disabling windows CI at the package level isn't the right answer