runtimes/google/lib/follow/bsd_darwin_linux_windows_config.go

// +build darwin freebsd linux netbsd openbsd windows

package follow

// newFSWatcher starts and returns a new fsnotify-based fsWatcher.
// filename specifies the file to watch.
func newFSWatcher(filename string) (*fsWatcher, error) {
	watch := newFSNotifyWatch(filename)
	return newCustomFSWatcher(watch)
}