Function prepare_for_pull

crates/lib/src/deploy.rs:508–546

(
    repo: &ostree::Repo,
    imgref: &ImageReference,
    target_imgref: Option<&OstreeImageReference>,
    booted_deployment: Option<&ostree::Deployment>,
)

}

pub(crate) async fn prepare_for_pull(
    repo: &ostree::Repo,
    imgref: &ImageReference,
    target_imgref: Option<&OstreeImageReference>,
    booted_deployment: Option<&ostree::Deployment>,
) -> Result<PreparedPullResult> {
    let imgref_canonicalized = imgref.clone().canonicalize()?;
    tracing::debug!("Canonicalized image reference: {imgref_canonicalized:#}");
    let ostree_imgref = &OstreeImageReference::from(imgref_canonicalized);
    let mut imp = new_importer(repo, ostree_imgref, booted_deployment).await?;
    if let Some(target) = target_imgref {
        imp.set_target(target);
    }
    let prep = match imp.prepare().await? {
        PrepareResult::AlreadyPresent(c) => {
            println!("No changes in {imgref:#} => {}", c.manifest_digest);
            return Ok(PreparedPullResult::AlreadyPresent(Box::new((*c).into())));
        }
        PrepareResult::Ready(p) => p,
    };
    check_bootc_label(&prep.config);
    if let Some(warning) = prep.deprecated_warning() {
        ostree_ext::cli::print_deprecated_warning(warning).await;
    }
    ostree_ext::cli::print_layer_status(&prep);
    let layers_to_fetch = prep.layers_to_fetch().collect::<Result<Vec<_>>>()?;

    let prepared_image = PreparedImportMeta {
        imp,
        n_layers_to_fetch: layers_to_fetch.len(),
        layers_total: prep.all_layers().count(),
        bytes_to_fetch: layers_to_fetch.iter().map(|(l, _)| l.layer.size()).sum(),
        bytes_total: prep.all_layers().map(|l| l.layer.size()).sum(),
        digest: prep.manifest_digest.clone(),
        prep,
    };

    Ok(PreparedPullResult::Ready(Box::new(prepared_image)))
}

/// Check whether the image exists in bootc's unified container storage.
///