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Support named, conditional tasks. 

A new property called task can be used to assign a name. If it is
specified, then the task's actions must be nested under an actions
property, and an if property can be used to make it conditional.
Just like on a link action, the value is executed in the shell. If
it has a non-zero exit code (failure), the whole task is skipped.
This allows tasks to group actions that only apply in certain
conditions (e.g. on certain OSes or in certain configurations),
and allows all actions (not just link) to be conditional.

If there is no task property, then the task behaves exactly as
it did previously.
This commit is contained in:
Dave Steinberg 2020-07-19 20:52:39 -04:00
parent 633ae5540f
commit 0098c52610
1 changed files with 18 additions and 10 deletions
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28
dotbot/dispatcher.py
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@ -22,35 +22,43 @@ class Dispatcher(object):
def dispatch(self, tasks):
success = True
for task in tasks:
test = task.get('if', None)
if test is not None and not test_success(test, cwd=self._context.base_directory(), log=self._log):
self._log.lowinfo('Skipping task')
continue
for action in task:
if action == 'if':
continue
actions = task
name = task.get('task', None)
if name is not None:
test = task.get('if', None)
if test is not None and not test_success(test, cwd=self._context.base_directory(), log=self._log):
self._log.info('Skipping task %s' % name)
actions = []
else:
actions = task.get('actions', [])
if not actions:
self._log.info('Task %s has no actions' % name)
else:
self._log.info('Starting task %s' % name)
for action in actions:
if self._only is not None and action not in self._only \
or self._skip is not None and action in self._skip:
self._log.info('Skipping action %s' % action)
continue
handled = False
if action == 'defaults':
self._context.set_defaults(task[action]) # replace, not update
self._context.set_defaults(actions[action]) # replace, not update
handled = True
# keep going, let other plugins handle this if they want
for plugin in self._plugins:
if plugin.can_handle(action):
try:
success &= plugin.handle(action, task[action])
success &= plugin.handle(action, actions[action])
handled = True
except Exception as err:
self._log.error(
'An error was encountered while executing action %s' %
action)
self._log.debug(err)
if not handled:
success = False
self._log.error('Action %s not handled' % action)
if name and actions:
self._log.info('Task %s completed' % name)
return success
def _load_plugins(self):