X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/ff666e5453d71418ca45ee0542a82e2c58ef8442..516b8d6c03058552cfe7c3bfda4362640a3077e1:/tasklib/backends.py?ds=sidebyside

diff --git a/tasklib/backends.py b/tasklib/backends.py
index 32a8018..4b0c6df 100644
--- 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):
@@ -103,8 +102,9 @@ class TaskWarrior(Backend):
         if not os.path.exists(self.taskrc_location):
             self.taskrc_location = '/'
 
+        self._config = None
         self.version = self._get_version()
-        self.config = {
+        self.overrides = {
             'confirmation': 'no',
             'dependency.confirmation': 'no',  # See TW-1483 or taskrc man page
             'recurrence.confirmation': 'no',  # Necessary for modifying R tasks
@@ -122,17 +122,17 @@ class TaskWarrior(Backend):
             data_location = os.path.expanduser(data_location)
             if create and not os.path.exists(data_location):
                 os.makedirs(data_location)
-            self.config['data.location'] = data_location
+            self.overrides['data.location'] = data_location
 
         self.tasks = TaskQuerySet(self)
 
     def _get_command_args(self, args, config_override=None):
         command_args = ['task', 'rc:{0}'.format(self.taskrc_location)]
-        config = self.config.copy()
-        config.update(config_override or dict())
-        for item in config.items():
+        overrides = self.overrides.copy()
+        overrides.update(config_override or dict())
+        for item in overrides.items():
             command_args.append('rc.{0}={1}'.format(*item))
-        command_args.extend(map(six.text_type, args))
+        command_args.extend([x.decode('utf-8') for x in args])
         return command_args
 
     def _get_version(self):
@@ -171,11 +171,17 @@ class TaskWarrior(Backend):
         if task.saved:
             for field in task._modified_fields:
                 add_field(field)
+
         # For new tasks, pass all fields that make sense
         else:
             for field in task._data.keys():
+                # We cannot set stuff that's read only (ID, UUID, ..)
                 if field in task.read_only_fields:
                     continue
+                # We do not want to do field deletion for new tasks
+                if task._data[field] is None:
+                    continue
+                # Otherwise we're fine
                 add_field(field)
 
         return args
@@ -229,7 +235,13 @@ class TaskWarrior(Backend):
 
     # Public interface
 
-    def get_config(self):
+    @property
+    def config(self):
+        # First, check if memoized information is available
+        if self._config:
+            return self._config
+
+        # If not, fetch the config using the 'show' command
         raw_output = self.execute_command(
             ['show'],
             config_override={'verbose': 'nothing'}
@@ -243,13 +255,17 @@ class TaskWarrior(Backend):
             if match:
                 config[match.group('key')] = match.group('value').strip()
 
-        return config
+        # Memoize the config dict
+        self._config = ReadOnlyDictView(config)
+
+        return self._config
 
     def execute_command(self, args, config_override=None, allow_failure=True,
                         return_all=False):
         command_args = self._get_command_args(
             args, config_override=config_override)
-        logger.debug(' '.join(command_args))
+        logger.debug(u' '.join(command_args))
+
         p = subprocess.Popen(command_args, stdout=subprocess.PIPE,
                              stderr=subprocess.PIPE)
         stdout, stderr = [x.decode('utf-8') for x in p.communicate()]
@@ -258,6 +274,7 @@ class TaskWarrior(Backend):
                 error_msg = stderr.strip()
             else:
                 error_msg = stdout.strip()
+            error_msg += u'\nCommand used: ' + u' '.join(command_args)
             raise TaskWarriorException(error_msg)
 
         # Return all whole triplet only if explicitly asked for
@@ -289,7 +306,7 @@ 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:
@@ -314,8 +331,10 @@ class TaskWarrior(Backend):
             id_lines = [l for l in output if l.startswith('Created task ')]
 
             # Complain loudly if it seems that more tasks were created
-            # Should not happen
-            if len(id_lines) != 1 or len(id_lines[0].split(' ')) != 3:
+            # Should not happen.
+            # Expected output: Created task 1.
+            #                  Created task 1 (recurrence template).
+            if len(id_lines) != 1 or len(id_lines[0].split(' ')) not in (3, 5):
                 raise TaskWarriorException("Unexpected output when creating "
                                            "task: %s" % '\n'.join(id_lines))
 
@@ -383,7 +402,7 @@ 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