Additionnal correction to FSL invwarp. Missing option from Camino dtifit

Author: mick-d

nipype/interfaces/camino/dti.py

@@ -16,6 +16,11 @@ class DTIFitInputSpec(StdOutCommandLineInputSpec):
     in_file = File(exists=True, argstr='%s', mandatory=True, position=1,
         desc='voxel-order data filename')
 
+    bgmask = File(argstr='-bgmask %s', exists=True,
+                  desc=('Provides the name of a file containing a background mask computed using, '
+                        'for example, FSL bet2 program. The mask file contains zero in background '
+                        'voxels and non-zero in foreground.'))
+
     scheme_file = File(exists=True, argstr='%s', mandatory=True, position=2,
         desc='Camino scheme file (b values / vectors, see camino.fsl2scheme)')
 

nipype/interfaces/fsl/utils.py

@@ -1213,8 +1213,8 @@ class InvWarp(FSLCommand):
 
     def _gen_filename(self, name):
         if name == 'inverse_warp':
-            warp = self.inputs.warp
-            return '%s_inv%s' % os.path.splitext(warp)
+            _, warpname , _ = split_filename(self.inputs.warp)
+            return warpname + '_inv'
         else:
             raise NotImplementedError