fileutils module
- gridtools.fileutils.resolveDataSource(grd, dsName)
This returns a final filename to gridtools to handle cases where the user may or may not provide a file:// prefix to filenames.
This routine does not check if the resolved filename exists.
This may also be a data source via ds:// in which we translate to a file:// spec.
http://, https:// and gql:// are not supported at this time.