Struct Group 

pub struct Group {
    pub key: String,
    pub files: Vec<PathBuf>,
    pub anchor: Option<PathBuf>,
    pub newest: Option<SystemTime>,
    pub bytes: u64,
}

One build unit: all files in the cache sharing a name-hash key.

Fields

key: String

e.g. serde-deadbeef

files: Vec<PathBuf>

Every file belonging to the unit (may span deps/ and .fingerprint/).

anchor: Option<PathBuf>

For build/, incremental/, .fingerprint/ units: the directory that backs the whole unit, deleted as a whole when stale.

newest: Option<SystemTime>

Newest mtime seen among the files (“last used”).

bytes: u64

Total size of all files.