roll coords

grid.py

def lon_to_180(ds, lon_coords="lon"):

    # https://git.iac.ethz.ch/utility_functions/utility_functions_python/-/blob/master/xarray.py#L149

    lon_orig = ds[lon_coords]

    if lon_orig.ndim != 1:
        raise ValueError("Currently only handels 1D grids")

    with xr.set_options(keep_attrs=True):
        lon = ((lon_orig + 180) % 360) - 180

    ds = ds.assign_coords({lon_coords: lon})

    return ds.sortby(ds[lon_coords])