36 lines
1021 B
Python
36 lines
1021 B
Python
# -*- coding: utf-8 -*-
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from inspect import isclass
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from pungi.phases.base import PhaseBase
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def gather_phases_metadata(source_object):
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"""
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Code gathers metadata from Phase classes.
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Metadata are 'name' attributes of the corresponding classes.
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Metadata are gathered without creating instances of Phase classes.
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"""
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if not source_object:
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raise ValueError(
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"PhasesMetadata can not load any data - it got empty parameter"
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)
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phases = []
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for item in dir(source_object):
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cls = getattr(source_object, item) # get all objects references
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if not isclass(cls): # filter out non-classes
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continue
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if issubclass(cls, PhaseBase):
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try:
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name_attr = getattr(cls, "name")
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phases.append(name_attr)
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except AttributeError:
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raise AttributeError(
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"Bad phase-class format: '%s' is missing attribute 'name'" % item
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)
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return phases
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