ComputeFileHashAtPath attempts to calculate the sha256 hash of a file (the file must already be opened).

ComputeFileHashAtPath attempts to open a file at a path and calculate its sha256 hash.

NewCache creates a new cache for storing sha256 hashes with associated files.

NewKey creates a base key for usage with the file hash cache.

WithDevice adds a device to the key.

With digest associates the key to a specific container digest, or to host.

WithInode adds inode information to the key.