Package-level declarations

Reason why cleaning a directory is refused for safety. Combined with --clean, accidental targeting of a sensitive directory could result in irreversible data loss, so the CLI refuses any of these cases up front.

Simple immutable stopwatch to measure elapsed time in milliseconds.

Decides whether this directory can be safely wiped by the CLI --clean flag.

Cleans this directory by deleting all files and directories inside it. Does nothing if the directory is empty or if the file does not exist or is not a directory.

Runs action with an optional timeout. If timeoutSeconds is null or non-positive, action is executed directly on the current thread. Otherwise, it is submitted and bounded by the given duration.