FIX MneExperiment: src other than ico-4

Was not included in path

eelbrain/_experiment/mne_experiment.py

@@ -1062,10 +1062,13 @@ def __init__(self, root=None, find_subjects=True, **state):
         # slave fields
         self._register_field('mrisubject', depends_on=('mri', 'subject'),
                              slave_handler=self._update_mrisubject)
+        self._register_field('src-name', depends_on=('src',),
+                             slave_handler=self._update_src_name)
 
         # compounds
         self._register_compound('sns_kind', ('modality', 'raw'))
-        self._register_compound('src_kind', ('sns_kind', 'cov', 'mri', 'inv'))
+        self._register_compound('src_kind', ('sns_kind', 'cov', 'mri',
+                                             'src-name', 'inv'))
         self._register_compound('evoked_kind', ('rej', 'equalize_evoked_count'))
         self._register_compound('eeg_kind', ('sns_kind', 'reference'))
 
@@ -5784,6 +5787,10 @@ def _update_session(self, fields):
         if isinstance(epoch, (PrimaryEpoch, SecondaryEpoch)):
             return epoch.session
 
+    def _update_src_name(self, fields):
+        "Becuase 'ico-4' is treated in filenames  as ''"
+        return '' if fields['src'] == 'ico-4' else fields['src']
+
     def _eval_parc(self, parc):
         if parc in self._parcs:
             if isinstance(self._parcs[parc], SeededParcellation):

eelbrain/_experiment/tests/test_mne_experiment.py

@@ -83,6 +83,10 @@ def test_mne_experiment_templates():
     eq_(e.get('src_kind'), '0-40 noreg fixed-3-dSPM')
     e.set(raw='1-40')
     eq_(e.get('src_kind'), '1-40 noreg fixed-3-dSPM')
+    e.set(src='ico-5')
+    eq_(e.get('src_kind'), '1-40 noreg ico-5 fixed-3-dSPM')
+    e.set(src='ico-4')
+    eq_(e.get('src_kind'), '1-40 noreg fixed-3-dSPM')
 
     # find terminal field names
     eq_(e.find_keys('raw-file'), {'root', 'subject', 'session'})