X-Git-Url: https://git.madduck.net/etc/taskwarrior.git/blobdiff_plain/1a429b9309cf543e937c9b8b061d0f99d1acffbe..22b01b5632033b1578d5fc5170d2c048f102f163:/tasklib/backends.py diff --git a/tasklib/backends.py b/tasklib/backends.py index f0c73ef..fa4f766 100644 --- a/tasklib/backends.py +++ b/tasklib/backends.py @@ -1,25 +1,28 @@ import abc +import copy +import datetime import json +import logging import os import re +import six import subprocess -from tasklib.task import TaskFilter +from .task import Task, TaskQuerySet, ReadOnlyDictView +from .filters import TaskWarriorFilter +from .serializing import local_zone -VERSION_2_1_0 = six.u('2.1.0') -VERSION_2_2_0 = six.u('2.2.0') -VERSION_2_3_0 = six.u('2.3.0') -VERSION_2_4_0 = six.u('2.4.0') -VERSION_2_4_1 = six.u('2.4.1') -VERSION_2_4_2 = six.u('2.4.2') -VERSION_2_4_3 = six.u('2.4.3') -VERSION_2_4_4 = six.u('2.4.4') -VERSION_2_4_5 = six.u('2.4.5') +DATE_FORMAT_CALC = '%Y-%m-%dT%H:%M:%S' + +logger = logging.getLogger(__name__) class Backend(object): - filter_class = TaskFilter + @abc.abstractproperty + def filter_class(self): + """Returns the TaskFilter class used by this backend""" + pass @abc.abstractmethod def filter_tasks(self, filter_obj): @@ -67,22 +70,46 @@ class Backend(object): """Syncs the backend database with the taskd server""" pass + def convert_datetime_string(self, value): + """ + Converts TW syntax datetime string to a localized datetime + object. This method is not mandatory. + """ + raise NotImplementedError + class TaskWarriorException(Exception): pass -class TaskWarrior(object): - def __init__(self, data_location=None, create=True, taskrc_location='~/.taskrc'): - self.taskrc_location = os.path.expanduser(taskrc_location) +class TaskWarrior(Backend): + + VERSION_2_1_0 = six.u('2.1.0') + VERSION_2_2_0 = six.u('2.2.0') + VERSION_2_3_0 = six.u('2.3.0') + VERSION_2_4_0 = six.u('2.4.0') + VERSION_2_4_1 = six.u('2.4.1') + VERSION_2_4_2 = six.u('2.4.2') + VERSION_2_4_3 = six.u('2.4.3') + VERSION_2_4_4 = six.u('2.4.4') + VERSION_2_4_5 = six.u('2.4.5') + + def __init__(self, data_location=None, create=True, + taskrc_location=None, task_command='task'): + self.taskrc_location = None + if taskrc_location: + self.taskrc_location = os.path.expanduser(taskrc_location) + + # If taskrc does not exist, pass / to use defaults and avoid creating + # dummy .taskrc file by TaskWarrior + if not os.path.exists(self.taskrc_location): + self.taskrc_location = '/' - # If taskrc does not exist, pass / to use defaults and avoid creating - # dummy .taskrc file by TaskWarrior - if not os.path.exists(self.taskrc_location): - self.taskrc_location = '/' + self.task_command = task_command + 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 @@ -92,7 +119,7 @@ class TaskWarrior(object): # 2.4.3 onwards supports 0 as infite bulk, otherwise set just # arbitrary big number which is likely to be large enough - 'bulk': 0 if self.version >= VERSION_2_4_3 else 100000, + 'bulk': 0 if self.version >= self.VERSION_2_4_3 else 100000, } # Set data.location override if passed via kwarg @@ -100,56 +127,172 @@ class TaskWarrior(object): 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_task_command(self): + return self.task_command.split() + 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(): + command_args = self._get_task_command() + 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') if isinstance(x, six.binary_type) + else six.text_type(x) for x in args + ]) return command_args def _get_version(self): p = subprocess.Popen( - ['task', '--version'], - stdout=subprocess.PIPE, - stderr=subprocess.PIPE) + self._get_task_command() + ['--version'], + stdout=subprocess.PIPE, + stderr=subprocess.PIPE) stdout, stderr = [x.decode('utf-8') for x in p.communicate()] return stdout.strip('\n') - def get_config(self): - raw_output = self.execute_command( - ['show'], - config_override={'verbose': 'nothing'} + def _get_modified_task_fields_as_args(self, task): + args = [] + + def add_field(field): + # Add the output of format_field method to args list (defaults to + # field:value) + serialized_value = task._serialize(field, task._data[field]) + + # Empty values should not be enclosed in quotation marks, see + # TW-1510 + if serialized_value is '': + escaped_serialized_value = '' + else: + escaped_serialized_value = six.u("'{0}'").format( + serialized_value) + + format_default = lambda task: six.u("{0}:{1}").format( + field, escaped_serialized_value) + + format_func = getattr(self, 'format_{0}'.format(field), + format_default) + + args.append(format_func(task)) + + # If we're modifying saved task, simply pass on all modified fields + 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 + + def format_depends(self, task): + # We need to generate added and removed dependencies list, + # since Taskwarrior does not accept redefining dependencies. + + # This cannot be part of serialize_depends, since we need + # to keep a list of all depedencies in the _data dictionary, + # not just currently added/removed ones + + old_dependencies = task._original_data.get('depends', set()) + + added = task['depends'] - old_dependencies + removed = old_dependencies - task['depends'] + + # Removed dependencies need to be prefixed with '-' + return 'depends:' + ','.join( + [t['uuid'] for t in added] + + ['-' + t['uuid'] for t in removed] + ) + + def format_description(self, task): + # Task version older than 2.4.0 ignores first word of the + # task description if description: prefix is used + if self.version < self.VERSION_2_4_0: + return task._data['description'] + else: + return six.u("description:'{0}'").format( + task._data['description'] or '', + ) + + def convert_datetime_string(self, value): + + if self.version >= self.VERSION_2_4_0: + # For strings, use 'calc' to evaluate the string to datetime + # available since TW 2.4.0 + args = value.split() + result = self.execute_command(['calc'] + args) + naive = datetime.datetime.strptime(result[0], DATE_FORMAT_CALC) + localized = local_zone.localize(naive) + else: + raise ValueError( + 'Provided value could not be converted to ' + 'datetime, its type is not supported: {}' + .format(type(value)), ) + return localized + + @property + def filter_class(self): + return TaskWarriorFilter + + # Public interface + + @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'} + ) + config = dict() - config_regex = re.compile(r'^(?P[^\s]+)\s+(?P[^\s].+$)') + config_regex = re.compile(r'^(?P[^\s]+)\s+(?P[^\s].*$)') for line in raw_output: match = config_regex.match(line) 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)) + + env = os.environ.copy() + if self.taskrc_location: + env['TASKRC'] = self.taskrc_location p = subprocess.Popen(command_args, stdout=subprocess.PIPE, - stderr=subprocess.PIPE) + stderr=subprocess.PIPE, env=env) stdout, stderr = [x.decode('utf-8') for x in p.communicate()] if p.returncode and allow_failure: if stderr.strip(): 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 @@ -165,7 +308,7 @@ class TaskWarrior(object): # of recurrent tasks. # Only necessary for TW up to 2.4.1, fixed in 2.4.2. - if self.version < VERSION_2_4_2: + if self.version < self.VERSION_2_4_2: self.execute_command(['next'], allow_failure=False) def merge_with(self, path, push=False): @@ -181,7 +324,7 @@ class TaskWarrior(object): 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: @@ -198,7 +341,7 @@ class TaskWarrior(object): """Save a task into TaskWarrior database using add/modify call""" args = [task['uuid'], 'modify'] if task.saved else ['add'] - args.extend(task._get_modified_fields_as_args()) + args.extend(self._get_modified_task_fields_as_args(task)) output = self.execute_command(args) # Parse out the new ID, if the task is being added for the first time @@ -206,10 +349,14 @@ class TaskWarrior(object): 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: - raise TaskWarriorException("Unexpected output when creating " - "task: %s" % '\n'.join(id_lines)) + # 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), + ) # Circumvent the ID storage, since ID is considered read-only identifier = id_lines[0].split(' ')[2].rstrip('.') @@ -236,7 +383,7 @@ class TaskWarrior(object): def complete_task(self, task): # Older versions of TW do not stop active task at completion - if self.version < VERSION_2_4_0 and task.active: + if self.version < self.VERSION_2_4_0 and task.active: task.stop() self.execute_command([task['uuid'], 'done']) @@ -262,7 +409,7 @@ class TaskWarrior(object): # For older TW versions attempt to uniquely locate the task # using the data we have if it has been just saved. # This can happen when adding a completed task on older TW versions. - if (not valid(output) and self.version < VERSION_2_4_5 + if (not valid(output) and self.version < self.VERSION_2_4_5 and after_save): # Make a copy, removing ID and UUID. It's most likely invalid @@ -275,15 +422,15 @@ class TaskWarrior(object): for key, value in data.items(): taskfilter.add_filter_param(key, value) - output = self.execute_command(['export', '--'] + - taskfilter.get_filter_params()) + output = self.execute_command(['export'] + + taskfilter.get_filter_params()) # If more than 1 task has been matched still, raise an exception if not valid(output): raise TaskWarriorException( - "Unique identifiers {0} with description: {1} matches " - "multiple tasks: {2}".format( - task['uuid'] or task['id'], task['description'], output) + 'Unique identifiers {0} with description: {1} matches ' + 'multiple tasks: {2}'.format( + task['uuid'] or task['id'], task['description'], output) ) return json.loads(output[0])