Merge branch 'release/0.12.0' into develop

[etc/taskwarrior.git] / tasklib / backends.py

diff --git a/tasklib/backends.py b/tasklib/backends.py
index b2038be70624d254c2d64a4347c8b20b04f42254..76fce88054d53e2a9b5b89e83ee4be9e8125d7ae 100644 (file)
--- a/tasklib/backends.py
+++ b/tasklib/backends.py
@@ -7,9 +7,8 @@ import os
 import re
 import six
 import subprocess
-import copy
 
-from .task import Task, TaskQuerySet
+from .task import Task, TaskQuerySet, ReadOnlyDictView
 from .filters import TaskWarriorFilter
 from .serializing import local_zone
 
@@ -76,7 +75,7 @@ class Backend(object):
         Converts TW syntax datetime string to a localized datetime
         object. This method is not mandatory.
         """
-        raise NotImplemented
+        raise NotImplementedError
 
 
 class TaskWarriorException(Exception):
@@ -234,7 +233,7 @@ class TaskWarrior(Backend):
     def config(self):
         # First, check if memoized information is available
         if self._config:
-            return copy.deepcopy(self._config)
+            return self._config
 
         # If not, fetch the config using the 'show' command
         raw_output = self.execute_command(
@@ -251,9 +250,9 @@ class TaskWarrior(Backend):
                 config[match.group('key')] = match.group('value').strip()
 
         # Memoize the config dict
-        self._config = config
+        self._config = ReadOnlyDictView(config)
 
-        return copy.deepcopy(config)
+        return self._config
 
     def execute_command(self, args, config_override=None, allow_failure=True,
                         return_all=False):
@@ -299,7 +298,7 @@ class TaskWarrior(Backend):
 
     def filter_tasks(self, filter_obj):
         self.enforce_recurrence()
-        args = ['export', '--'] + filter_obj.get_filter_params()
+        args = ['export'] + filter_obj.get_filter_params()
         tasks = []
         for line in self.execute_command(args):
             if line:
@@ -393,7 +392,7 @@ class TaskWarrior(Backend):
             for key, value in data.items():
                 taskfilter.add_filter_param(key, value)
 
-            output = self.execute_command(['export', '--'] +
+            output = self.execute_command(['export'] +
                                           taskfilter.get_filter_params())
 
         # If more than 1 task has been matched still, raise an exception