clientid

func LoadOrCreate ¶

func LoadOrCreate(directory string) (string, error)

LoadOrCreate returns the UUIDv4 stored in directory/client_id. The ID is independent of credentials, profiles, and CLI versions. It is never silently replaced: an unreadable or invalid existing file is an error.

A fully written temporary file is published with an atomic, non-replacing hard link. Concurrent first callers, including separate processes, all use the winning file; no caller can observe a partially written ID. The directory must support hard links when creating an ID for the first time.