vargo: Decouple from rustup #877
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| if let Ok(sysroot) = std::env::var("RUST_SYSROOT") { | ||
| child_args.push("--sysroot".to_string()); | ||
| child_args.push(sysroot); | ||
| } |
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Why do you need this? Is it to set a sysroot manually, that would otherwise be set by rustup?
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(Somehow missed the notification, my apologies)
Yes, rustup wrappers automatically set the correct LD_LIBRARY_PATH (or equivalents on other platforms) when executing the toolchain binaries, and binaries distributed by rust-overlay and fenix have their runpaths patched so the default sysroot detection logic works.
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Thanks! Do you know if there's a way to set the sysroot for rustc with an environment variable? Or is it just the --sysroot flag?
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(Sorry again)
I quickly looked, and I couldn't find an environment variable to do this override.
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Sorry all, it's been a while but I rebased the PR on top of the latest changes. |
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This PR makes vargo aware of a new environment variable,
VARGO_TOOLCHAIN, which can be one of the following:rust-toolchain.toml(current behavior)host: Uses the Rust toolchain fromPATH(3) allows Verus to be built without rustup, which is useful when the Rust toolchain is managed by something else like Nix + rust-overlay. Furthermore, (2) can be used to temporarily override the rustup toolchain to test Rust updates.
We've been using this downstream for a while since we use Nix to manage everything. We are submitting this upstream to see if this is something you would like and to stop bumping into merge conflicts 😄