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Existence check in local CAS.

Source: R/tar_repository_cas_local.R
tar_cas_e.Rd

For internal use only.

Usage

tar_cas_e(cas, key)

Arguments

cas

File path to the CAS repository. NULL to default to file.path(tar_config_get("store"), "cas") (usually "_targets/cas/").

key

Key of the object in the CAS system.

Value

TRUE if the key exists in the CAS system, FALSE otherwise.

Details

The short function name helps reduce the size of the tar_repository_cas() format string and save space in the metadata.

tar_cas_e() uses an in-memory cache in a package internal environment to maintain a list of keys that exists. This avoids expensive one-time lookups to the file system during tar_make().