Struct CacheManifest 

pub struct CacheManifest {
    pub version: u32,
    pub entries: HashMap<String, CacheManifestEntry>,
}

Cache manifest tracking all downloaded datasets.

Stored as manifest.json in the cache directory. Enables:

• Reproducibility: know exactly what was downloaded
• Validation: verify checksums match
• Debugging: trace when data was fetched

Fields

version: u32

Version of the manifest format.

entries: HashMap<String, CacheManifestEntry>

Entries for each cached dataset.

Implementations

impl CacheManifest

pub const CURRENT_VERSION: u32 = 1

Current manifest format version.

pub fn new() -> Self

Create a new empty manifest.

pub fn load(cache_dir: &Path) -> Result<Self>

Load manifest from a cache directory.

Returns empty manifest if file doesn’t exist.

pub fn save(&self, cache_dir: &Path) -> Result<()>

Save manifest to a cache directory.

pub fn update_entry(&mut self, entry: CacheManifestEntry)

Add or update an entry in the manifest.

pub fn get(&self, dataset_id: &str) -> Option<&CacheManifestEntry>

Get entry for a dataset.

pub fn verify_entry(&self, dataset_id: &str, cache_dir: &Path) -> bool

Check if a dataset’s cached file matches the manifest.

Returns true if the file exists and checksum matches.

Trait Implementations

impl Clone for CacheManifest

fn clone(&self) -> CacheManifest

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CacheManifest

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

Formats the value using the given formatter.

impl Default for CacheManifest

fn default() -> CacheManifest

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for CacheManifest

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for CacheManifest

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.