Added [xor] metadata to afni.AutoTcorrelate

Author: margulies

nipype/interfaces/afni/preprocess.py

@@ -320,10 +320,13 @@ class AutoTcorrelateInputSpec(AFNICommandInputSpec):
     mask = File(exists=True, desc="mask of voxels",
                 argstr="-mask %s")
     mask_only_targets = traits.Bool(desc="use mask only on targets voxels",
-                                    argstr="-mask_only_targets")
+                                    argstr="-mask_only_targets",
+                                    xor=['mask_source'])
+                                    
     mask_source = File(exists=True, 
-        desc="mask to restrict target voxels. not to be used with mask_only_targets", 
-        argstr="-mask_source %s")
+                        desc="mask for source voxels", 
+                        argstr="-mask_source %s",
+                        xor=['mask_only_targets'])
 
     out_file = File("%s_similarity_matrix.1D", desc='output image file name',
                     argstr='-prefix %s', name_source="in_file", usedefault=True)