pub fn view_diff(

    repo: &git2::Repository,

    left: &git2::Oid,

    right: &git2::Oid,

) -> anyhow::Result<()> {

    // TODO(erikli): Replace with repo.diff()

    let workdir = repo

        .workdir()

        .ok_or_else(|| anyhow!("Could not get workdir current repository."))?;

    let left = format!("{:.7}", left.to_string());

    let right = format!("{:.7}", right.to_string());

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

        .current_dir(workdir)

        .args(["diff", &left, &right])

        .spawn()?;

    git.wait()?;

    Ok(())

}