mirror of https://github.com/python/cpython
49 lines
1.8 KiB
Python
49 lines
1.8 KiB
Python
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"""Base class for index crawlers."""
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from packaging.pypi.dist import ReleasesList
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class BaseClient:
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"""Base class containing common methods for the index crawlers/clients"""
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def __init__(self, prefer_final, prefer_source):
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self._prefer_final = prefer_final
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self._prefer_source = prefer_source
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self._index = self
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def _get_prefer_final(self, prefer_final=None):
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"""Return the prefer_final internal parameter or the specified one if
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provided"""
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if prefer_final:
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return prefer_final
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else:
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return self._prefer_final
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def _get_prefer_source(self, prefer_source=None):
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"""Return the prefer_source internal parameter or the specified one if
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provided"""
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if prefer_source:
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return prefer_source
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else:
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return self._prefer_source
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def _get_project(self, project_name):
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"""Return an project instance, create it if necessary"""
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return self._projects.setdefault(project_name.lower(),
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ReleasesList(project_name, index=self._index))
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def download_distribution(self, requirements, temp_path=None,
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prefer_source=None, prefer_final=None):
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"""Download a distribution from the last release according to the
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requirements.
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If temp_path is provided, download to this path, otherwise, create a
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temporary location for the download and return it.
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"""
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prefer_final = self._get_prefer_final(prefer_final)
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prefer_source = self._get_prefer_source(prefer_source)
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release = self.get_release(requirements, prefer_final)
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if release:
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dist = release.get_distribution(prefer_source=prefer_source)
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return dist.download(temp_path)
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