Use the standard GitHub cache action

[palant]

Call me paranoid but I don’t like depending on third-party stuff for the build infrastructure. So I looked into whether there is a more canonical caching solution for Github actions. Turns out there is: https://github.com/actions/cache/blob/main/examples.md#rust---cargo. It works well for my repo.

One has to commit the Cargo.lock file however. That’s probably recommendable either way.

[olafurw]

Sure, seems fine. I just picked some from google.

[palant]

There is one more difference: the way I understood, the action you used cannot clean up the cache for release builds. The cache key doesn’t change when dependencies change, so it just keeps adding to the existing cache. With action/cache on the other hand each dependency change results in a cache key change and a clean rebuild of all dependencies.

[olafurw]

Good call.