]> git.madduck.net Git - etc/taskwarrior.git/blobdiff - tasklib/backends.py

madduck's git repository

Every one of the projects in this repository is available at the canonical URL git://git.madduck.net/madduck/pub/<projectpath> — see each project's metadata for the exact URL.

All patches and comments are welcome. Please squash your changes to logical commits before using git-format-patch and git-send-email to patches@git.madduck.net. If you'd read over the Git project's submission guidelines and adhered to them, I'd be especially grateful.

SSH access, as well as push access can be individually arranged.

If you use my repositories frequently, consider adding the following snippet to ~/.gitconfig and using the third clone URL listed for each project:

[url "git://git.madduck.net/madduck/"]
  insteadOf = madduck:

backends: Do not perform field deletion for new tasks
[etc/taskwarrior.git] / tasklib / backends.py
index 32a8018acb142ddb1257e0fe3916089bde2ecf70..fd3069c583aebc011222e28c096e3e38b026b502 100644 (file)
@@ -7,9 +7,8 @@ import os
 import re
 import six
 import subprocess
 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
 
 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.
         """
         Converts TW syntax datetime string to a localized datetime
         object. This method is not mandatory.
         """
-        raise NotImplemented
+        raise NotImplementedError
 
 
 class TaskWarriorException(Exception):
 
 
 class TaskWarriorException(Exception):
@@ -103,8 +102,9 @@ class TaskWarrior(Backend):
         if not os.path.exists(self.taskrc_location):
             self.taskrc_location = '/'
 
         if not os.path.exists(self.taskrc_location):
             self.taskrc_location = '/'
 
+        self._config = None
         self.version = self._get_version()
         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
             'confirmation': 'no',
             'dependency.confirmation': 'no',  # See TW-1483 or taskrc man page
             'recurrence.confirmation': 'no',  # Necessary for modifying R tasks
@@ -122,15 +122,15 @@ class TaskWarrior(Backend):
             data_location = os.path.expanduser(data_location)
             if create and not os.path.exists(data_location):
                 os.makedirs(data_location)
             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)]
 
         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))
         return command_args
             command_args.append('rc.{0}={1}'.format(*item))
         command_args.extend(map(six.text_type, args))
         return command_args
@@ -171,11 +171,17 @@ class TaskWarrior(Backend):
         if task.saved:
             for field in task._modified_fields:
                 add_field(field)
         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():
         # 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
                 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
                 add_field(field)
 
         return args
@@ -229,7 +235,13 @@ class TaskWarrior(Backend):
 
     # Public interface
 
 
     # 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'}
         raw_output = self.execute_command(
             ['show'],
             config_override={'verbose': 'nothing'}
@@ -243,7 +255,10 @@ class TaskWarrior(Backend):
             if match:
                 config[match.group('key')] = match.group('value').strip()
 
             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):
 
     def execute_command(self, args, config_override=None, allow_failure=True,
                         return_all=False):
@@ -289,7 +304,7 @@ class TaskWarrior(Backend):
 
     def filter_tasks(self, filter_obj):
         self.enforce_recurrence()
 
     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:
         tasks = []
         for line in self.execute_command(args):
             if line:
@@ -314,8 +329,10 @@ 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
             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))
 
                 raise TaskWarriorException("Unexpected output when creating "
                                            "task: %s" % '\n'.join(id_lines))
 
@@ -383,7 +400,7 @@ class TaskWarrior(Backend):
             for key, value in data.items():
                 taskfilter.add_filter_param(key, value)
 
             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
                                           taskfilter.get_filter_params())
 
         # If more than 1 task has been matched still, raise an exception