How to compiletest workspace child crates?

[aldanor]

If there's a workspace and the crate foo being tested lives in a subfolder foo/, how do you compile-test it? (in a workspace, the target/ folder is at the workspace root) What should target_rustcflags be set to?

The only way I could make it work was with

• cd foo && cargo test --target-dir ./target (and setting flags to -L target/debug -L target/debug/deps). But this is kind of ugly and brittle, and requires setting target-dir manually.

Simply running cargo test from either the root folder or the crate subfolder doesn't seem to work (Can't find crate foo). Setting link flags to -L ../target/debug doesn't solve it either.

[aldanor]

Using .link_deps() adds proper link paths, like -L /path/to/workspace/target/debug, but it still fails to compile.

Upd: after running cargo clean, it did work for a few times, until in a few runs it stopped working due to "Some errors occurred: E0463, E0464" (how can you even have both at the same time? i.e. crate missing and multiple matching crates)

Upd: it looks like it stops working after running either cargo clippy or cargo check. I've double checked, .clean_rmeta() indeed cleans all target/debug/deps/*.rmeta files created by either of those commands, but it doesn't help and still causes E0463/E0464.

[aldanor]

Closing since it since to be related to #114