fn main() {
let sha = std::process::Command::new("git")
.args(["rev-parse", "HEAD"])
.output()
.ok()
.filter(|o| o.status.success())
.and_then(|o| String::from_utf8(o.stdout).ok())
.map(|s| s.trim().to_string())
.filter(|s| !s.is_empty())
.unwrap_or_else(|| "unknown".to_string());
println!("cargo:rustc-env=SHOGIESA_GIT_SHA={sha}");
println!("cargo:rerun-if-changed=../../.git/HEAD");
}