languages: add CEL, SpiceDB schema language

[jzelinskie]

CEL (Common Expression Language) is a non-Turing-Complete language created at Google for embedding into programs. It's used in a variety of projects such as Kubernetes and SpiceDB.

SpiceDB is a popular, open source authorization system inspired by the system internal at Google, Zanzibar.

This PR adds language/grammar support for both of these projects.

I'm not sure the CEL highlighting is working -- I might need some help with writing custom queries for it. The SpiceDB grammar includes queries that target Helix.

[jzelinskie]

I seem to be getting the following error when I run cargo xtask docgen:

error[E0658]: use of unstable library feature 'stdsimd'

[the-mikedavis]

Are you running on aarch64? That may be #9294. You can apply the diff suggested in the Docs CI or revert the dep locally temporarily to fix the build

[the-mikedavis]

You'll need to add the queries to runtime/queries/cel/highlights.scm and runtime/queries/spicedb/highlights.scm. You can use the queries in the repos if they exist (queries/highlights.scm) as guides or copy them if they already use the Helix captures (https://docs.helix-editor.com/master/themes.html#syntax-highlighting) - we don't automatically use the ones in the repos.

[jzelinskie]

Thanks for the feedback!

I am using an M1, so rebasing on master fixed my issue.

I copied over the queries. I'd love a sanity check from someone better at tree-sitter because I'm not sure CEL is being properly injected into the (caveat_expr) .

[jzelinskie]

Thanks very much for the feedback! I've commit your changes.

What's a good way to test the injecting of CEL into the SpiceDB schema?

[the-mikedavis]

You'll have to test the injection manually by finding a caveat_expr node in a SpiceDB file and checking its highlighting.

You can examine the syntax trees when you're in a SpiceDB file by selecting a block for example and using :tree-sitter-subtree

[jzelinskie]

Thanks a ton!
I'm not sure how I didn't discover that command before, but it was vital for debugging.

I've got it all working now!