build.rs

use std::process::Command;
use std::time::SystemTime;

fn main() {
    let git_sha = Command::new("git")
        .args(["rev-parse", "HEAD"])
        .output()
        .map(|o| String::from_utf8_lossy(&o.stdout).trim().to_string())
        .unwrap_or_else(|_| "unknown".to_string());
    println!("cargo:rustc-env=GIT_SHA={git_sha}");

    let build_time = SystemTime::now()
        .duration_since(SystemTime::UNIX_EPOCH)
        .map(|d| d.as_secs().to_string())
        .unwrap_or_else(|_| "0".to_string());
    println!("cargo:rustc-env=BUILD_TIME={build_time}");

    println!("cargo:rerun-if-changed=build.rs");
}