ostree/ostree_transport.go
func (ref ostreeReference) NewImageDestination(ctx context.Context, sys *types.SystemContext) (types.ImageDestination, error) {
	var tmpDir string
	if sys == nil || sys.OSTreeTmpDirPath == "" {
		tmpDir = os.TempDir()
	} else {
		tmpDir = sys.OSTreeTmpDirPath
	}
	return newImageDestination(ref, tmpDir)
}
func (ref ostreeReference) NewImageDestination(ctx context.Context, sys *types.SystemContext) (types.ImageDestination, error) {
	var tmpDir string
	if sys == nil || sys.OSTreeTmpDirPath == "" {
		tmpDir = os.TempDir()
	} else {
		tmpDir = sys.OSTreeTmpDirPath
	}
	return newImageDestination(ref, tmpDir)
}
// NewImageDestination returns a types.ImageDestination for this reference.
// The caller must call .Close() on the returned ImageDestination.