build.rs


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use std::process::Command;

fn main() {
    let git_hash = Command::new("git")
        .args(["rev-parse", "HEAD"])
        .output()
        .map(|out| String::from_utf8_lossy(&out.stdout).trim().to_string())
        .unwrap_or_else(|_| "unknown".into());

    let git_date = Command::new("git")
        .args(["show", "-s", "--format=%cI", "HEAD"])
        .output()
        .map(|out| String::from_utf8_lossy(&out.stdout).trim().to_string())
        .unwrap_or_else(|_| "unknown".into());

    println!("cargo:rustc-env=GIT_HASH={}", git_hash);
    println!("cargo:rustc-env=BUILD_DATE={}", git_date);

    println!("cargo:rerun-if-changed=.git/HEAD");
    println!("cargo:rerun-if-changed=.git/refs/heads");
}