feat(build): Use RUSTFMT to find rustfmt binary
#566
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@LucioFranco Hey, sorry to ping but do you have a moment to take a look at this? 🙏 |
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Hey @LucioFranco, just pining this PR one more time in hopes you have time for a quick review 😅 🙏 |
seanmonstar
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Mar 11, 2021
LucioFranco
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Mar 11, 2021
LucioFranco
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rustfmt via a RUSTFMT environment variableRUSTFMT to find rustfmt binary
It's the same thing Cargo uses: https://doc.rust-lang.org/cargo/reference/environment-variables.html#environment-variables-cargo-reads That was my primary goal here, was to have parity with cargo. |
This was referenced Mar 18, 2021
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Motivation
The Rust Bazel rules (rules_rust) is looking to add some tools for building targets with Tonic. In development of bazelbuild/rules_rust#479 it was found that
tonic-buildcallsrustfmtand expects this to be in the user's PATH. This is generally not going to be the case when Building in Bazel. We're looking for a way to specify this binary without needing to rely on or modify PATH.Solution
Cargo already has a pattern for specifying environment variables to control what binaries are used during builds. The change here adopts the same functionality as Cargo and allows for an environment variable (
RUSTFMT) to optionally specify the location of therustfmtbinary.