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- import re
- import textwrap
- import email.message
- from ._text import FoldedCase
- class Message(email.message.Message):
- multiple_use_keys = set(
- map(
- FoldedCase,
- [
- 'Classifier',
- 'Obsoletes-Dist',
- 'Platform',
- 'Project-URL',
- 'Provides-Dist',
- 'Provides-Extra',
- 'Requires-Dist',
- 'Requires-External',
- 'Supported-Platform',
- 'Dynamic',
- ],
- )
- )
- """
- Keys that may be indicated multiple times per PEP 566.
- """
- def __new__(cls, orig: email.message.Message):
- res = super().__new__(cls)
- vars(res).update(vars(orig))
- return res
- def __init__(self, *args, **kwargs):
- self._headers = self._repair_headers()
- # suppress spurious error from mypy
- def __iter__(self):
- return super().__iter__()
- def _repair_headers(self):
- def redent(value):
- "Correct for RFC822 indentation"
- if not value or '\n' not in value:
- return value
- return textwrap.dedent(' ' * 8 + value)
- headers = [(key, redent(value)) for key, value in vars(self)['_headers']]
- if self._payload:
- headers.append(('Description', self.get_payload()))
- return headers
- @property
- def json(self):
- """
- Convert PackageMetadata to a JSON-compatible format
- per PEP 0566.
- """
- def transform(key):
- value = self.get_all(key) if key in self.multiple_use_keys else self[key]
- if key == 'Keywords':
- value = re.split(r'\s+', value)
- tk = key.lower().replace('-', '_')
- return tk, value
- return dict(map(transform, map(FoldedCase, self)))
|
