use git2::Repository;
use std::{env, fs, io::Write};

fn main() {
    let outdir = env::var("OUT_DIR").unwrap();
    let outfile = format!("{}/buildinfo.txt", outdir);

    let repo = Repository::open(env::current_dir().unwrap()).unwrap();
    let head = repo.head().unwrap();
    let head_name = head.shorthand().unwrap();
    let commit = head.peel_to_commit().unwrap();
    let commit_id = commit.id();
    let now = chrono::Local::now();

    let mut fh = fs::File::create(&outfile).unwrap();
    write!(
        fh,
        r#""wgvirtipd {} ({}) on {}""#,
        commit_id, head_name, now
    )
    .ok();
}