BackgroundPollUntilContextCancel spawns a new goroutine that runs the condition function on interval.

CreateTempDirOrDie ..

EnsureDirOrDie TODO: doc.

GetEnv - Lookup the environment variable provided and set to default value if variable isn't found.

GetPluralEnv - Lookup the plural environment variable.

Buffer is an internal buffer wrapper to ensure that Write/Read operations are thread-safe and cannot be run at the same time.