pub fn gen_range<S: Rng, T>(rng: &mut S, range: RangeInclusive<T>) -> T

where

    T: SampleUniform + PartialEq + PartialOrd + Clone,

{

    if range.start() == range.end() {

        range.start().clone()

        rng.gen_range(range)

}

pub fn format_nanoseconds(nanoseconds: f64) -> String {

    if nanoseconds <= f64::EPSILON {

        String::from("0s")

    } else if nanoseconds < 1_000. {

    } else if nanoseconds < 1_000_000. {

        format_float(nanoseconds / 1_000., "us")

    } else if nanoseconds < 1_000_000_000. {

        format_float(nanoseconds / 1_000_000., "ms")

    } else if nanoseconds < 1_000_000_000_000. {

        format_float(nanoseconds / 1_000_000_000., "s")

}

fn format_float(value: f64, suffix: &str) -> String {

    if value < 10. {

        format!("{:.3}{}", value, suffix)

    } else if value < 100. {

        format!("{:.2}{}", value, suffix)

        format!("{:.1}{}", value, suffix)

}

pub fn current_timestamp_string() -> String {

    OffsetDateTime::now_utc().format(&Rfc3339).unwrap()

}

pub fn local_git_rev() -> String {

    let command_output = Command::new("git")

        .args(["rev-parse", "HEAD"])

        .output()

        .unwrap();

    String::from_utf8(command_output.stdout)

        .unwrap()

        .trim()

        .to_string()

}