support rls and clippy

[matthiaskrgr]

It would be great if sccache supported clippy and rls calls as well.
I tried something like RUSTC_WRAPPER="sccache clippy-driver rustc" but that didn't work out.

[luser]

What would you expect sccache to do in this scenario? AFAIK rls and clippy aren't performing actual compilation so there isn't likely to be any benefit from caching the executions.

[matthiaskrgr]

rls calls rustc and dumps its compilation output into target/rls.
clippy-driver also calls rustc, but none of these calls (both clippy and rls) seem to be cached.

I was trying to play around with the code and make it accept "clippy-driver rustc" as a valid "compiler" but to no avail.

[doronbehar]

I'm not sure about clippy but as for rls, I think it does benefit from having RUSTC_WRAPPER="sccache" set in the environment.

[trinity-1686a]

As a workaround for clippy, it's possible to run check before as both use the same (rustc managed-)cache. On some project of mine, running clippy directly takes ~4m10s, but running cargo check && cargo clippy takes only ~2m30 by taking advantage of sccache

[luser]

It's possible this was fixed by #441

[matthiaskrgr]

Similar discussion: #539