from niworkflows.utils.spaces import Reference, SpatialReferences
from smriprep.workflows.anatomical import init_anat_preproc_wf
spaces=SpatialReferences([
    ('MNI152Lin', {}),
    ('fsaverage', {'density': '10k'}),
    ('T1w', {}),
    ('fsnative', {})
])
spaces.checkpoint()
wf = init_anat_preproc_wf(
    bids_root='.',
    freesurfer=True,
    hires=False,
    longitudinal=False,
    omp_nthreads=1,
    output_dir='.',
    skull_strip_mode='force',
    skull_strip_template=Reference('MNI152NLin2009cAsym'),
    spaces=spaces,
    skull_strip_fixed_seed=False,
    t1w=['sub-01/anat/sub-01_T1w.nii.gz'],
    t2w=[],
    msm_sulc=True,
    precomputed={},
)