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Set RUSTC and RUSTDOC env for child processes run through the proxy #2958

Merged
merged 1 commit into from
Mar 10, 2022
Merged

Set RUSTC and RUSTDOC env for child processes run through the proxy #2958

merged 1 commit into from
Mar 10, 2022

Commits on Mar 10, 2022

  1. Set RUSTC and RUSTDOC env for child processes run through the proxy 

    This serves two purposes:
1. It avoids the overhead of having to re-parse `settings.toml` on each proxy.
   In projects with many crates, this can have non-trivial overhead.
2. For build scripts, it provides an absolute path for RUSTC rather than forcing them to look it up in PATH.
   This allows them to find the sysroot path for the toolchain, rather than ending up somewhere in CARGO_HOME.

The original motivation for this was to allow `bootstrap` in rust-lang/rust
to allow building stage0 tools without python, only the host rust toolchain.
    @jyn514
    jyn514 committed Mar 10, 2022
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