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https://github.com/Cuprate/cuprate.git
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33 lines
919 B
Rust
33 lines
919 B
Rust
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fn main() {
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#[cfg(feature = "constants")]
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set_commit_env();
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}
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#[cfg(feature = "constants")]
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/// This sets the git `COMMIT` environment variable.
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fn set_commit_env() {
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const PATH: &str = "../.git/refs/heads/";
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println!("cargo:rerun-if-changed={PATH}");
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// FIXME: This could also be `std::fs::read({PATH}/{branch})`
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// so the machine building doesn't need `git`, although:
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// 1. Having `git` as a build dependency is probably ok
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// 2. It causes issues on PRs that aren't the `main` branch
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let output = std::process::Command::new("git")
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.arg("rev-parse")
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.arg("HEAD")
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.output()
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.unwrap();
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let commit = std::str::from_utf8(&output.stdout)
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.unwrap()
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.trim()
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.to_lowercase();
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// Commit hash should always be 40 bytes long.
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assert_eq!(commit.as_bytes().len(), 40);
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println!("cargo:rustc-env=COMMIT={commit}");
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}
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