// Copyright © 2020 Intel Corporation
//
// SPDX-License-Identifier: Apache-2.0
//

#[macro_use(crate_version)]
extern crate clap;

use std::process::Command;

fn main() {
    let mut git_human_readable = "v".to_owned() + crate_version!();
    if let Ok(git_out) = Command::new("git").args(&["describe", "--dirty"]).output() {
        if git_out.status.success() {
            if let Ok(git_out_str) = String::from_utf8(git_out.stdout) {
                git_human_readable = git_out_str;
            }
        }
    }

    let mut git_revision = "".to_string();
    if let Ok(git_out) = Command::new("git").args(&["rev-parse", "HEAD"]).output() {
        if git_out.status.success() {
            if let Ok(git_out_str) = String::from_utf8(git_out.stdout) {
                git_revision = git_out_str;
            }
        }
    }

    let mut git_committer_date = "".to_string();
    if let Ok(git_out) = Command::new("git")
        .args(&["show", "-s", "--format=%cd"])
        .output()
    {
        if git_out.status.success() {
            if let Ok(git_out_str) = String::from_utf8(git_out.stdout) {
                git_committer_date = git_out_str;
            }
        }
    }

    // This println!() has a special behavior, as it will set the environment
    // variable GIT_human_readable, so that it can be reused from the binary.
    // Particularly, this is used from the main.rs to display the exact
    // version information.
    println!("cargo:rustc-env=GIT_HUMAN_READABLE={}", git_human_readable);
    println!("cargo:rustc-env=GIT_REVISION={}", git_revision);
    println!("cargo:rustc-env=GIT_COMMITER_DATE={}", git_committer_date);
}