polymer 0.2.0

use std::process::Command;
fn main() {
    // note: add error checking yourself.
    let output = Command::new("git")
        .args(&["describe", "--tags", "--dirty"])
        .output()
        .unwrap();
    let git_hash = String::from_utf8(output.stdout).unwrap();
    println!("cargo:rustc-env=GIT_VERSION={}", git_hash);
}