properly update all dependencies during update

[wolfv]

When attempting to update conda-smithy with mamba, it only considers conda-smithy itself for update and not all dependencies of conda-smithy, since the dependency specs are still valid.

[dhirschfeld]

...so long as --no-update-deps works.

conda's habit of updating everything by default is a bit of a bugbear of mine so I always pass the --no-update-deps flag - applying the "if it ain't broken, don't fix it" policy.

I dislike updating everything (when it isn't strictly necessary) because it often dramatically slows down what should be a simple single package update and it interacts badly with conda's other habit of shuffling packages

If I want to update all my dependencies I do an explicit conda update --all

[dhirschfeld]

To be fair, the package shuffling was due to the mis-specification/use of features IIUC and I haven't seen that behaviour more recently.

[minrk]

pip has introduced an upgrade strategy flag for this, with the default of "only-if-needed" and "eager" for opting in to updating all packages in the dependency tree. I think for folks choosing mamba, which should be folks looking for an optimized experience, defaulting to the smaller still-valid delta is a good choice. As long as there's still the option for eager transactions, I think it's okay or even good to do the smaller thing.