Caching build artifacts between CI runs

[michprev]

Hey,
I wonder if it's possible to share the Rust project (Maturin-based) build artifacts across CI runs so that only incremental compilation can be performed.
I suppose it would mean to copy the target directory for each configuration and inject it in the next run.

However, I cannot find a suitable cibuildwheel hook (something like CIBW_AFTER_BUILD) to execute the cache saving logic. Any ideas?

[joerick]

This is a common request - e.g.

• RFE: env var for post build and test command #115
• Way to publish other files/binaries as GH Release from each build? #363
• Is there a way to extract non-wheel outputs from a cibuildwheel Docker container? #1030

I think what's lacking here is a concrete proposal for how such a feature would work. It could try to tackle the non-build outputs in a general way, have some kind of sync mechanism for cache dirs in docker containers, or just be a simple after-all command that uses the /host mount for file transfer. Each have their respective merits!