RF: Use shlex to correctly identify the executable

Author: effigies

nipype/interfaces/base/core.py

@@ -26,6 +26,7 @@
 import platform
 import select
 import subprocess as sp
+import shlex
 import sys
 from textwrap import wrap
 import simplejson as json
@@ -987,27 +988,15 @@ def _run_interface(self, runtime, correct_return_codes=(0, )):
         runtime.environ.update(out_environ)
 
         # which $cmd
-        executable_name = self.cmd.split()[0]
-
-        prefix_parts = self._cmd_prefix.split()
-        r_pre = prefix_parts.pop() if prefix_parts else ''
-
-        cmd_path = which(r_pre + executable_name, env=runtime.environ)
+        executable_name = shlex.split(self._cmd_prefix + self.cmd)[0]
+        cmd_path = which(executable_name, env=runtime.environ)
 
         if cmd_path is None:
             raise IOError(
                 'No command "%s" found on host %s. Please check that the '
                 'corresponding package is installed.' % (executable_name,
                                                          runtime.hostname))
 
-        if prefix_parts:
-            helper_command = which(prefix_parts[0], env=runtime.environ)
-            if helper_command is None:
-                raise IOError(
-                    'No command "%s" found on host %s. Please check that the '
-                    'corresponding package is installed.' % (helper_command,
-                                                             runtime.hostname))
-
         runtime.command_path = cmd_path
         runtime.dependencies = (get_dependencies(executable_name,
                                                  runtime.environ)