Source code for swh.indexer.metadata_dictionary.python

# Copyright (C) 2018-2019  The Software Heritage developers
# See the AUTHORS file at the top-level directory of this distribution
# License: GNU General Public License version 3, or any later version
# See top-level LICENSE file for more information

import email.parser
import email.policy
import itertools

from swh.indexer.codemeta import CROSSWALK_TABLE, SCHEMA_URI

from .base import DictMapping, SingleFileMapping

_normalize_pkginfo_key = str.lower


[docs]class LinebreakPreservingEmailPolicy(email.policy.EmailPolicy):
[docs] def header_fetch_parse(self, name, value): if hasattr(value, "name"): return value value = value.replace("\n ", "\n") return self.header_factory(name, value)
[docs]class PythonPkginfoMapping(DictMapping, SingleFileMapping): """Dedicated class for Python's PKG-INFO mapping and translation. https://www.python.org/dev/peps/pep-0314/""" name = "pkg-info" filename = b"PKG-INFO" mapping = { _normalize_pkginfo_key(k): v for (k, v) in CROSSWALK_TABLE["Python PKG-INFO"].items() } string_fields = [ "name", "version", "description", "summary", "author", "author-email", ] _parser = email.parser.BytesHeaderParser(policy=LinebreakPreservingEmailPolicy())
[docs] def translate(self, content): msg = self._parser.parsebytes(content) d = {} for (key, value) in msg.items(): key = _normalize_pkginfo_key(key) if value != "UNKNOWN": d.setdefault(key, []).append(value) metadata = self._translate_dict(d, normalize=False) if SCHEMA_URI + "author" in metadata or SCHEMA_URI + "email" in metadata: metadata[SCHEMA_URI + "author"] = { "@list": [ { "@type": SCHEMA_URI + "Person", SCHEMA_URI + "name": metadata.pop(SCHEMA_URI + "author", [None])[0], SCHEMA_URI + "email": metadata.pop(SCHEMA_URI + "email", [None])[0], } ] } return self.normalize_translation(metadata)
[docs] def normalize_home_page(self, urls): return [{"@id": url} for url in urls]
[docs] def normalize_keywords(self, keywords): return list(itertools.chain.from_iterable(s.split(" ") for s in keywords))
[docs] def normalize_license(self, licenses): return [{"@id": license} for license in licenses]