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[FIX] defer check of file existence to workflow build stage #520

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[FIX] defer check of file existence to workflow build stage #520

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13 changes: 9 additions & 4 deletions sdcflows/fieldmaps.py
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Original file line number Diff line number Diff line change
Expand Up @@ -229,10 +229,8 @@ class FieldmapFile:
@path.validator
def check_path(self, attribute, value):
"""Validate a fieldmap path."""
if not value.is_file():
raise FileNotFoundError(
f'File path <{value}> does not exist, is a broken link, or it is not a file'
)
if not value.is_file() and not value.is_symlink():
raise FileNotFoundError(f'File path <{value}> does not exist, or it is not a file')

if not value.name.endswith(('.nii', '.nii.gz')):
raise ValueError(f'File path <{value}> does not look like a NIfTI file.')
Expand Down Expand Up @@ -472,6 +470,13 @@ def get_workflow(self, set_inputs=True, **kwargs):
if self.method in (EstimatorType.MAPPED, EstimatorType.PHASEDIFF):
from .workflows.fit.fieldmap import init_fmap_wf

for f in self.sources:
if not f.path.is_file():
raise FileNotFoundError(
f'File path <{f.path}> does not exist, '
'is a broken link, or it is not a file'
)

kwargs['mode'] = str(self.method).rpartition('.')[-1].lower()
self._wf = init_fmap_wf(**kwargs)
if set_inputs:
Expand Down
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