Struct DeltaLayerSource 

pub(crate) struct DeltaLayerSource {
    delta: Arc<Delta>,
    repo: Mutex<Repo>,
    source_commit: OnceCell<String>,
}

Produces the target image’s layers from an oci-delta and a source commit already in the repository, without any network access.

Fields

delta: Arc<Delta>

repo: Mutex<Repo>

ostree::Repo is Send but not Sync, and LayerSource is both.

source_commit: OnceCell<String>

Implementations

impl DeltaLayerSource

pub(crate) fn new(delta: Arc<Delta>, repo: &Repo) -> Self

fn repo(&self) -> Repo

async fn source_commit(&self) -> Result<&str>

The commit to read source content from.

Resolved on first use rather than up front: an import that turns out to need no layers at all needs no source either, and this still runs before anything is written.

fn open_patch( &self, manifest: &ImageManifest, layer: &Descriptor, ) -> Result<(Box<dyn BlobStream>, MediaType, Digest)>

The patch for layer, its media type, and the diff_id the reconstructed content must hash to.

Trait Implementations

impl Debug for DeltaLayerSource

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl LayerSource for DeltaLayerSource

fn fetch_layer<'a>( &'a self, manifest: &'a ImageManifest, layer: &'a Descriptor, _progress: Option<&'a Sender<Option<LayerProgress>>>, ) -> BoxFuture<'a, Result<FetchedLayer<'a>>>

Open one layer of manifest for reading.

fn finish(self: Box<Self>) -> BoxFuture<'static, Result<()>>

Release the source, at most once and after the last Self::fetch_layer.