fn main() {
// Add git version.
let git = std::process::Command::new("git")
.args(["describe", "--tags", "--dirty", "--always"])
.output()
.ok()
.and_then(|o| String::from_utf8(o.stdout).ok())
.unwrap_or_else(|| "unknown".into());
println!("cargo:rustc-env=GIT_VERSION={}", git.trim());
}