fn main() {
    // Because we're including tags, commit IDs, and dirty status we want to build a new binary
    // with the correct information when we make a commit or tag a commit.
    println!("cargo:rerun-if-changed=.git/refs/heads");
    println!("cargo:rerun-if-changed=.git/refs/tags");

    report_build_profile();
    report_enabled_features();
    report_repository_version();
}

fn report_build_profile() {
    println!("cargo:rustc-env=BUILD_PROFILE={}", std::env::var("PROFILE").unwrap());
}

fn report_enabled_features() {
    let mut enabled_features: Vec<&str> = Vec::new();

    if enabled_features.is_empty() {
        enabled_features.push("none");
    }

    println!("cargo:rustc-env=BUILD_FEATURES={}", enabled_features.join(","));
}

fn report_repository_version() {
    let version = match std::env::var("CI_BUILD_REF") {
        Ok(val) if !val.is_empty() => val,
        _ => {
            let git_describe = std::process::Command::new("git")
                .args(["describe", "--always", "--dirty", "--long", "--tags"])
                .output()
                .unwrap();

            String::from_utf8(git_describe.stdout).unwrap()
        },
    };

    println!("cargo:rustc-env=REPO_VERSION={}", version);
}