how to get builds reusing full artifacts on kernel restart (not just sccashe)

[nuke-web3]

as much as possible, reuse all build work without omtroducing jupyter issues related to it (maybe) needing some things reset between each run.

[JoshOrndorff]

Is this issue about jupyter only? Or is it bigger about all rust builds

[nuke-web3]

Mostly jupyter - as every kernel restasrt uses a new /tmp/<random>target

https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-reads

CARGO_TARGET_DIR — Location of where to place all generated artifacts, relative to the current working directory. See build.target-dir to set via config.

Mentioned in this great steam https://www.youtube.com/watch?v=pMiqRM5ooNw

[nuke-web3]

https://github.com/google/evcxr/issues/231 opened to ask formally

[nuke-web3]

Answer

If you set EVCXR_TMPDIR, then evcxr will just use that one directory. If you have multiple kernels running, then you should make sure they have separate directories.