ci:Magic Nix Cache is deprecated -> find replacement

[JakobLichterfeld]

Our CI thows the following warning

[Magic Nix Cache is deprecated: .github/workflows/ensure_linting.yml#L21](https://github.com/teslamate-org/teslamate/commit/c8e6cddb4ba6b5f4fb58257f7def1803c8a76447#annotation_32045752967)
Magic Nix Cache has been deprecated due to a change in the underlying GitHub APIs and will stop working on 1 February 2025.
To continue caching Nix builds in GitHub Actions, use FlakeHub Cache instead.

Replace...
        uses: DeterminateSystems/magic-nix-cache-action@6221693898146dc97e38ad0e013488a16477a4c4 #v9

...with...
        uses: DeterminateSystems/flakehub-cache-action@6221693898146dc97e38ad0e013488a16477a4c4 #v9

For more details: https://dtr.mn/magic-nix-cache-eol

( see for exmple: https://github.com/teslamate-org/teslamate/actions/runs/13373331839)

[JakobLichterfeld]

https://determinate.systems/posts/magic-nix-cache-free-tier-eol/

The TL;DR:

The free Magic Nix Cache will stop working unless you’re on GitHub Enterprise Server.
Users can upgrade to FlakeHub Cache and get one month free using the coupon code FHC.
Open source projects can request a free account at support@flakehub.com.

[JakobLichterfeld]

IMO we should move away from this cache action and replace with a different one

https://github.com/nix-community/cache-nix-action

[brianmay]

More documentation on change:

https://determinate.systems/posts/magic-nix-cache-free-tier-eol/

And here:

https://flakehub.com/cache

Notice to Magic Nix Cache users

GitHub will shut down the API that Magic Nix Cache uses on February 1st. Their new SDK makes it clear they don't want other languages or libraries, like Magic Nix Cache, to interact with their cache.

To continue using Magic Nix Cache after January 2025, switch to FlakeHub Cache and get one month free with the coupon code FHC.

Open source projects can contact us at support@flakehub.com to get FlakeHub Cache for free.

Our announcement blog post has more detaild about this change.

[brianmay]

DeterminateSystems/magic-nix-cache-action#106

[brianmay]

I am testing cache-nix-action on my personal project: brianmay/robotica-rust#764

[brianmay]

Also see: DeterminateSystems/magic-nix-cache-action#106 (comment)

[JakobLichterfeld]

Also see: DeterminateSystems/magic-nix-cache-action#106 (comment)

The lack of communication and documentation from DeterminateSystems means that I tend to no longer want to use their actions.

[brianmay]

Yes. same here.

I can't help but think DeterminateSystems was looking for any excuse to stop their free offering and blame github in the process. I am not at all optimistic that they will resume their development efforts or retract their statements blaming github.