fn main() {
let output = std::process::Command::new("git")
.args(["rev-parse", "--short", "HEAD"])
.output();
let hash = output
.map(|o| String::from_utf8_lossy(&o.stdout).trim().to_string())
.unwrap_or_default();
println!("cargo:rustc-env=GIT_HASH={hash}");
}