use chrono::Utc;
use std::process::Command;
fn main() {
let git_tag = get_git_output(&["git", "describe", "--tags", "--abbrev=0"])
.unwrap_or_else(|| "unknown".to_string());
let git_commit = get_git_output(&["git", "rev-parse", "--short", "HEAD"])
.unwrap_or_else(|| "unknown".to_string());
let version = git_tag.strip_prefix('v').unwrap_or(&git_tag);
let build_date = Utc::now().format("%Y-%m-%d %H:%M:%S UTC").to_string();
println!("cargo:rustc-env=VERSION={}", version);
println!("cargo:rustc-env=GIT_TAG={}", git_tag);
println!("cargo:rustc-env=GIT_COMMIT={}", git_commit);
println!("cargo:rustc-env=BUILD_DATE={}", build_date);
println!("cargo:rerun-if-changed=.git/HEAD");
println!("cargo:rerun-if-changed=.git/refs/tags");
println!("cargo:rerun-if-changed=.git/packed-refs");
}
fn get_git_output(args: &[&str]) -> Option<String> {
Command::new(args[0])
.args(&args[1..])
.output()
.ok()
.and_then(|output| {
if output.status.success() {
String::from_utf8(output.stdout)
.ok()
.map(|s| s.trim().to_string())
} else {
None
}
})
}