use std::process::Command; fn main() { let output = Command::new("git") .args(["rev-parse", "HEAD"]) .output() .unwrap(); let git_hash = String::from_utf8(output.stdout).unwrap(); println!("cargo:rustc-env=GIT_HASH={}", git_hash); let date = chrono::Utc::now().to_rfc3339(); println!("cargo:rustc-env=BUILD_DATE={}", date); }