Struct MetadataReferences

pub struct MetadataReferences {
    pub manifest: MetadataReference,
    pub tarsplit: MetadataReference,
}

References to the manifest and tarsplit metadata. You can read these from the file footer or from the annotations on the OCI layer descriptor.

Fields

manifest: MetadataReference

The location of the manifest data

tarsplit: MetadataReference

The location of the tarsplit data

Implementations

impl MetadataReferences

pub fn from_footer(suffix: &[u8]) -> Option<Self>

Read the metadata references from the file footer. The provided data can be any suffix of the file, but it must be at least 72 bytes in length (to contain the footer). Returns None if this doesn’t appear to be a zstd:chunked file.

pub fn from_oci(annotations: HashMap<String, String>) -> Option<Self>

Parses the metadata references from OCI layer descriptor annotations. The type of the annotations HashMap was chosen to be compatible with the oci-spec crate. Returns None if this doesn’t appear to be a zstd:chunked layer descriptor.