Fix undefined names

This fixes apparent problems detected when F821 check is enabled.

./packstack/installer/core/drones.py:43:16: F821 undefined name 'ScriptRuntimeError'
        except ScriptRuntimeError as ex:
               ^
./packstack/installer/core/drones.py:313:9: F821 undefined name 'shutil'
        shutil.rmtree(self.local_tmpdir, ignore_errors=True)

./packstack/installer/run_setup.py:115:37: F821 undefined name 'raw_input'
                        userInput = raw_input(message.read())
                                    ^
./packstack/installer/run_setup.py:194:15: F821 undefined name 'raw_input'
        raw = raw_input(message.read())
              ^
./tests/installer/test_drones.py:82:23: F821 undefined name 'tarfile'
            tarball = tarfile.open(pack_path)
                      ^

Change-Id: Ie100fa47472c2bd55635d5b4a524cf9ef6671940

packstack/installer/core/drones.py

@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import os
+import shutil
 import stat
 import uuid
 import time
@@ -40,7 +41,7 @@ class SshTarballTransferMixin(object):
                       "tar -C %(res_dir)s -xpzf %(pack_dest)s" % args)
         try:
             script.execute()
-        except ScriptRuntimeError as ex:
+        except utils.ScriptRuntimeError as ex:
             # TO-DO: change to appropriate exception
             raise RuntimeError('Failed to copy resources to node %s. '
                                'Reason: %s' % (node, ex))

packstack/installer/run_setup.py

@@ -112,7 +112,7 @@ def _getInputFromUser(param):
                     if (param.MASK_INPUT):
                         userInput = getpass.getpass("%s :" % (param.PROMPT))
                     else:
-                        userInput = raw_input(message.read())
+                        userInput = input(message.read())
                 else:
                     userInput = commandLineValues[param.CONF_NAME]
                 # If DEFAULT_VALUE is set and user did not input anything
@@ -191,7 +191,7 @@ def _askYesNo(question=None):
         message.write(askString)
         message.seek(0)
 
-        raw = raw_input(message.read())
+        raw = input(message.read())
         if not len(raw):
             continue
 

tests/installer/test_drones.py

@@ -17,6 +17,7 @@
 
 import os
 import shutil
+import tarfile
 import tempfile
 from unittest import TestCase