changing Node._output_dir to realpath to solve issues with OSX tmpdir (abspath returns /var/.. and realpath returns /private/var/... and some files are removed by clean_working_directory

Author: djarecka

nipype/pipeline/engine/nodes.py

@@ -275,7 +275,7 @@ def output_dir(self):
                 params_str = [_parameterization_dir(p) for p in params_str]
             outputdir = op.join(outputdir, *params_str)
 
-        self._output_dir = op.abspath(op.join(outputdir, self.name))
+        self._output_dir = op.realpath(op.join(outputdir, self.name))
         return self._output_dir
 
     def set_input(self, parameter, val):