cuprate/constants/build.rs

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