| 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() |
|
|
| |
| 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))) |
|
|
