AddOverlay adds the provided ext3 overlay file at overlayPath to the OCI-SIF at imagePath, as a new image layer.

GetSingleImage returns a v1.Image from an OCI-SIF, that must contain a single image.

HasOverlay returns whether the OCI-SIF at imgPath has an ext3 writable final layer - an 'overlay'.

NewImageWriter returns a writer, which will write an OCI image into an OCI-SIF file.

SealOverlay converts an ext3 overlay into a r/o squashfs layer.

SkipCosignMatcher matches all images / indices, except those that are related to cosign images, as annotated using the sylabs/oci-tools ref.name convention.

SyncOverlay synchronizes the digests of the overlay, stored in the OCI structures, with its true content.

WithArtifactType says the image should be written with the artifactType field defined in the OCI v1.1.0 specification to v.

WithSquash sets a flag whether to squash to a single layer.

WithSquashFSLayers sets a flag whether to ensure layers are written as SquashFS.

WriteDataContainerFromPath takes a path to a directory or regular file, and writes a data container image populated with the directory/file to dest, as an OCI-SIF.

ConfigMediaType custom media type.

ConfigMediaType custom media type.

TODO - Replace when exported from SIF / oci-tools.