buildRustCrate: Make CARGO_MANIFEST_DIR absolute #56778
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While it is not obvious from the source, cargo sets CARGO_MANIFEST_DIR to an absolute directory. This let to a build problem with the popular "tera" crate using the "pest" crate. ## Cargo details The variable is set here: https://github.com/rust-lang/cargo/blob/f7c91ba6220e1b96aa14e5964e7074452f9551fb/src/cargo/core/compiler/compilation.rs#L229 and computed from the `manifest_path`: https://github.com/rust-lang/cargo/blob/f7c91ba6220e1b96aa14e5964e7074452f9551fb/src/cargo/core/package.rs#L163 The manifest path is also exported via `cargo metadata` where you can see that it is absolute.
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Ok, I can't complete the |
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Thank you @kolloch and @P-E-Meunier |
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Motivation for this change
While it is not obvious from the source, cargo sets CARGO_MANIFEST_DIR to an absolute directory. This let to a build problem with the popular "tera" crate using the "pest" crate.
See #56808 for details.
Cargo details
The variable is set here:
https://github.com/rust-lang/cargo/blob/f7c91ba6220e1b96aa14e5964e7074452f9551fb/src/cargo/core/compiler/compilation.rs#L229
and computed from the
manifest_path:https://github.com/rust-lang/cargo/blob/f7c91ba6220e1b96aa14e5964e7074452f9551fb/src/cargo/core/package.rs#L163
The manifest path is also exported via
cargo metadatawhere you can see that it is absolute.Things done
sandboxinnix.confon non-NixOS)nix-shell -p nox --run "nox-review wip --against origin/master"(still running)./result/bin/)nix path-info -Sbefore and after)