fn clone_shallow()

in focus/operations/src/clone.rs [674:730]

• 49 lines of code
• 8 McCabe index (conditional complexity)

fn clone_shallow(
    source_url: &Url,
    destination_path: &Path,
    branch: &str,
    copy_branches: bool,
    days_of_history: u64,
    app: Arc<App>,
) -> Result<()> {
    // Unfortunately time::duration is signed
    let days_of_history: i64 = days_of_history.try_into()?;

    let shallow_since_datestamp =
        focus_util::time::formatted_datestamp_at_day_in_past(days_of_history)?;

    // Check if local dense repo has a main branch that's out of date
    if source_url.scheme().eq_ignore_ascii_case("file") {
        let source_path = Path::new(source_url.path());
        let repo = Repo::open(source_path, app.clone()).with_context(|| {
            format!("Could not open the dense repo to check date of {}", branch)
        })?;
        let main_branch = repo
            .underlying()
            .find_branch(branch, git2::BranchType::Local)
            .context("Failed to find main branch")?;
        let main_branch_commit_id = main_branch
            .get()
            .peel_to_commit()
            .context("Failed to peel to commit of main branch")?;
        let main_branch_tip_date = DateTime::from_utc(
            NaiveDateTime::from_timestamp(main_branch_commit_id.time().seconds(), 0),
            Utc,
        )
        .date();

        let shallow_since_date = focus_util::time::date_at_day_in_past(days_of_history)?;
        if days_of_history > 0 && main_branch_tip_date < shallow_since_date {
            bail!("Your main branch {} is older than the specified shallow date: {}. Run a `git pull` in your dense repo to update it!", branch, shallow_since_datestamp)
        }
    }

    let mut builder = CloneBuilder::new(destination_path.into());
    builder
        .fetch_url(source_url.as_str().into())
        .no_checkout(true)
        .follow_tags(false)
        .branch(branch.into());

    if days_of_history > 0 {
        builder.add_clone_arg(format!("--shallow-since={}", shallow_since_datestamp));
    }

    if !copy_branches {
        builder.add_clone_arg("--single-branch");
    }
    run_clone(builder, app)?;
    Ok(())
}