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32 lines
1 KiB
Python
32 lines
1 KiB
Python
from common.exceptions import TaskListError
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class Task(object):
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phase = None
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before = []
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after = []
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def __init__(self):
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self._check_ordering()
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def __str__(self):
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return '{module}.{task}'.format(module=self.__module__, task=self.__class__.__name__)
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def __repr__(self):
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return self.__str__()
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def _check_ordering(self):
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def name(ref):
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return '{module}.{task}'.format(module=ref.__module__, task=ref.__class__.__name__)
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for task in self.before:
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if self.phase > task.phase:
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msg = ("The task {self} is specified as running before {other}, "
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"but its phase {phase} lies after the phase {other_phase}"
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.format(self=type(self), other=task, phase=self.phase, other_phase=task.phase))
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raise TaskListError(msg)
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for task in self.after:
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if self.phase < task.phase:
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msg = ("The task {self} is specified as running after {other}, "
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"but its phase {phase} lies before the phase {other_phase}"
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.format(self=type(self), other=task, phase=self.phase, other_phase=task.phase))
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raise TaskListError(msg)
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