caucase.test: Drop dependency on deprecated distutils module.

caucase/test.py

@@ -31,9 +31,6 @@ except ImportError: # pragma: no cover
   # BBB: py2.7
   from Cookie import SimpleCookie
 import datetime
-# pylint: disable=no-name-in-module, import-error
-from distutils.spawn import find_executable
-# pylint: enable=no-name-in-module, import-error
 import errno
 import functools
 import glob
@@ -3839,12 +3836,19 @@ if getattr(CaucaseTest, 'assertItemsEqual', None) is None: # pragma: no cover
   CaucaseTest.assertItemsEqual = CaucaseTest.assertCountEqual
 # pylint: enable=no-member
 
-_caucase_sh_path = find_executable(
-  'caucase.sh',
-  path=os.path.join(
-    os.path.dirname(__file__), os.path.pardir, 'shell',
-  ) + os.path.pathsep + os.getenv('PATH', ''),
-)
+def _findCaucaseSh():
+  file_directory = os.path.dirname(__file__)
+  caucase_sh = 'caucase.sh'
+  for path in [
+    file_directory,
+    os.path.join(file_directory, os.path.pardir, 'shell'),
+  ] + os.getenv('PATH', '').split(os.path.pathsep): # pragma: no cover
+    result = os.path.join(path, caucase_sh)
+    if os.path.isfile(result):
+      return result
+  return None # pragma: no cover
+
+_caucase_sh_path = _findCaucaseSh()
 def _runCaucaseSh(*args):
   command = (_caucase_sh_path, ) + args
   environ = os.environ.copy()