mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-24 05:45:05 +00:00
825 lines
32 KiB
Python
825 lines
32 KiB
Python
import email.feedparser
|
|
import email.header
|
|
import email.message
|
|
import email.parser
|
|
import email.policy
|
|
import sys
|
|
import typing
|
|
from typing import (
|
|
Any,
|
|
Callable,
|
|
Dict,
|
|
Generic,
|
|
List,
|
|
Optional,
|
|
Tuple,
|
|
Type,
|
|
Union,
|
|
cast,
|
|
)
|
|
|
|
from . import requirements, specifiers, utils, version as version_module
|
|
|
|
T = typing.TypeVar("T")
|
|
if sys.version_info[:2] >= (3, 8): # pragma: no cover
|
|
from typing import Literal, TypedDict
|
|
else: # pragma: no cover
|
|
if typing.TYPE_CHECKING:
|
|
from typing_extensions import Literal, TypedDict
|
|
else:
|
|
try:
|
|
from typing_extensions import Literal, TypedDict
|
|
except ImportError:
|
|
|
|
class Literal:
|
|
def __init_subclass__(*_args, **_kwargs):
|
|
pass
|
|
|
|
class TypedDict:
|
|
def __init_subclass__(*_args, **_kwargs):
|
|
pass
|
|
|
|
|
|
try:
|
|
ExceptionGroup
|
|
except NameError: # pragma: no cover
|
|
|
|
class ExceptionGroup(Exception): # noqa: N818
|
|
"""A minimal implementation of :external:exc:`ExceptionGroup` from Python 3.11.
|
|
|
|
If :external:exc:`ExceptionGroup` is already defined by Python itself,
|
|
that version is used instead.
|
|
"""
|
|
|
|
message: str
|
|
exceptions: List[Exception]
|
|
|
|
def __init__(self, message: str, exceptions: List[Exception]) -> None:
|
|
self.message = message
|
|
self.exceptions = exceptions
|
|
|
|
def __repr__(self) -> str:
|
|
return f"{self.__class__.__name__}({self.message!r}, {self.exceptions!r})"
|
|
|
|
else: # pragma: no cover
|
|
ExceptionGroup = ExceptionGroup
|
|
|
|
|
|
class InvalidMetadata(ValueError):
|
|
"""A metadata field contains invalid data."""
|
|
|
|
field: str
|
|
"""The name of the field that contains invalid data."""
|
|
|
|
def __init__(self, field: str, message: str) -> None:
|
|
self.field = field
|
|
super().__init__(message)
|
|
|
|
|
|
# The RawMetadata class attempts to make as few assumptions about the underlying
|
|
# serialization formats as possible. The idea is that as long as a serialization
|
|
# formats offer some very basic primitives in *some* way then we can support
|
|
# serializing to and from that format.
|
|
class RawMetadata(TypedDict, total=False):
|
|
"""A dictionary of raw core metadata.
|
|
|
|
Each field in core metadata maps to a key of this dictionary (when data is
|
|
provided). The key is lower-case and underscores are used instead of dashes
|
|
compared to the equivalent core metadata field. Any core metadata field that
|
|
can be specified multiple times or can hold multiple values in a single
|
|
field have a key with a plural name. See :class:`Metadata` whose attributes
|
|
match the keys of this dictionary.
|
|
|
|
Core metadata fields that can be specified multiple times are stored as a
|
|
list or dict depending on which is appropriate for the field. Any fields
|
|
which hold multiple values in a single field are stored as a list.
|
|
|
|
"""
|
|
|
|
# Metadata 1.0 - PEP 241
|
|
metadata_version: str
|
|
name: str
|
|
version: str
|
|
platforms: List[str]
|
|
summary: str
|
|
description: str
|
|
keywords: List[str]
|
|
home_page: str
|
|
author: str
|
|
author_email: str
|
|
license: str
|
|
|
|
# Metadata 1.1 - PEP 314
|
|
supported_platforms: List[str]
|
|
download_url: str
|
|
classifiers: List[str]
|
|
requires: List[str]
|
|
provides: List[str]
|
|
obsoletes: List[str]
|
|
|
|
# Metadata 1.2 - PEP 345
|
|
maintainer: str
|
|
maintainer_email: str
|
|
requires_dist: List[str]
|
|
provides_dist: List[str]
|
|
obsoletes_dist: List[str]
|
|
requires_python: str
|
|
requires_external: List[str]
|
|
project_urls: Dict[str, str]
|
|
|
|
# Metadata 2.0
|
|
# PEP 426 attempted to completely revamp the metadata format
|
|
# but got stuck without ever being able to build consensus on
|
|
# it and ultimately ended up withdrawn.
|
|
#
|
|
# However, a number of tools had started emitting METADATA with
|
|
# `2.0` Metadata-Version, so for historical reasons, this version
|
|
# was skipped.
|
|
|
|
# Metadata 2.1 - PEP 566
|
|
description_content_type: str
|
|
provides_extra: List[str]
|
|
|
|
# Metadata 2.2 - PEP 643
|
|
dynamic: List[str]
|
|
|
|
# Metadata 2.3 - PEP 685
|
|
# No new fields were added in PEP 685, just some edge case were
|
|
# tightened up to provide better interoptability.
|
|
|
|
|
|
_STRING_FIELDS = {
|
|
"author",
|
|
"author_email",
|
|
"description",
|
|
"description_content_type",
|
|
"download_url",
|
|
"home_page",
|
|
"license",
|
|
"maintainer",
|
|
"maintainer_email",
|
|
"metadata_version",
|
|
"name",
|
|
"requires_python",
|
|
"summary",
|
|
"version",
|
|
}
|
|
|
|
_LIST_FIELDS = {
|
|
"classifiers",
|
|
"dynamic",
|
|
"obsoletes",
|
|
"obsoletes_dist",
|
|
"platforms",
|
|
"provides",
|
|
"provides_dist",
|
|
"provides_extra",
|
|
"requires",
|
|
"requires_dist",
|
|
"requires_external",
|
|
"supported_platforms",
|
|
}
|
|
|
|
_DICT_FIELDS = {
|
|
"project_urls",
|
|
}
|
|
|
|
|
|
def _parse_keywords(data: str) -> List[str]:
|
|
"""Split a string of comma-separate keyboards into a list of keywords."""
|
|
return [k.strip() for k in data.split(",")]
|
|
|
|
|
|
def _parse_project_urls(data: List[str]) -> Dict[str, str]:
|
|
"""Parse a list of label/URL string pairings separated by a comma."""
|
|
urls = {}
|
|
for pair in data:
|
|
# Our logic is slightly tricky here as we want to try and do
|
|
# *something* reasonable with malformed data.
|
|
#
|
|
# The main thing that we have to worry about, is data that does
|
|
# not have a ',' at all to split the label from the Value. There
|
|
# isn't a singular right answer here, and we will fail validation
|
|
# later on (if the caller is validating) so it doesn't *really*
|
|
# matter, but since the missing value has to be an empty str
|
|
# and our return value is dict[str, str], if we let the key
|
|
# be the missing value, then they'd have multiple '' values that
|
|
# overwrite each other in a accumulating dict.
|
|
#
|
|
# The other potentional issue is that it's possible to have the
|
|
# same label multiple times in the metadata, with no solid "right"
|
|
# answer with what to do in that case. As such, we'll do the only
|
|
# thing we can, which is treat the field as unparseable and add it
|
|
# to our list of unparsed fields.
|
|
parts = [p.strip() for p in pair.split(",", 1)]
|
|
parts.extend([""] * (max(0, 2 - len(parts)))) # Ensure 2 items
|
|
|
|
# TODO: The spec doesn't say anything about if the keys should be
|
|
# considered case sensitive or not... logically they should
|
|
# be case-preserving and case-insensitive, but doing that
|
|
# would open up more cases where we might have duplicate
|
|
# entries.
|
|
label, url = parts
|
|
if label in urls:
|
|
# The label already exists in our set of urls, so this field
|
|
# is unparseable, and we can just add the whole thing to our
|
|
# unparseable data and stop processing it.
|
|
raise KeyError("duplicate labels in project urls")
|
|
urls[label] = url
|
|
|
|
return urls
|
|
|
|
|
|
def _get_payload(msg: email.message.Message, source: Union[bytes, str]) -> str:
|
|
"""Get the body of the message."""
|
|
# If our source is a str, then our caller has managed encodings for us,
|
|
# and we don't need to deal with it.
|
|
if isinstance(source, str):
|
|
payload: str = msg.get_payload()
|
|
return payload
|
|
# If our source is a bytes, then we're managing the encoding and we need
|
|
# to deal with it.
|
|
else:
|
|
bpayload: bytes = msg.get_payload(decode=True)
|
|
try:
|
|
return bpayload.decode("utf8", "strict")
|
|
except UnicodeDecodeError:
|
|
raise ValueError("payload in an invalid encoding")
|
|
|
|
|
|
# The various parse_FORMAT functions here are intended to be as lenient as
|
|
# possible in their parsing, while still returning a correctly typed
|
|
# RawMetadata.
|
|
#
|
|
# To aid in this, we also generally want to do as little touching of the
|
|
# data as possible, except where there are possibly some historic holdovers
|
|
# that make valid data awkward to work with.
|
|
#
|
|
# While this is a lower level, intermediate format than our ``Metadata``
|
|
# class, some light touch ups can make a massive difference in usability.
|
|
|
|
# Map METADATA fields to RawMetadata.
|
|
_EMAIL_TO_RAW_MAPPING = {
|
|
"author": "author",
|
|
"author-email": "author_email",
|
|
"classifier": "classifiers",
|
|
"description": "description",
|
|
"description-content-type": "description_content_type",
|
|
"download-url": "download_url",
|
|
"dynamic": "dynamic",
|
|
"home-page": "home_page",
|
|
"keywords": "keywords",
|
|
"license": "license",
|
|
"maintainer": "maintainer",
|
|
"maintainer-email": "maintainer_email",
|
|
"metadata-version": "metadata_version",
|
|
"name": "name",
|
|
"obsoletes": "obsoletes",
|
|
"obsoletes-dist": "obsoletes_dist",
|
|
"platform": "platforms",
|
|
"project-url": "project_urls",
|
|
"provides": "provides",
|
|
"provides-dist": "provides_dist",
|
|
"provides-extra": "provides_extra",
|
|
"requires": "requires",
|
|
"requires-dist": "requires_dist",
|
|
"requires-external": "requires_external",
|
|
"requires-python": "requires_python",
|
|
"summary": "summary",
|
|
"supported-platform": "supported_platforms",
|
|
"version": "version",
|
|
}
|
|
_RAW_TO_EMAIL_MAPPING = {raw: email for email, raw in _EMAIL_TO_RAW_MAPPING.items()}
|
|
|
|
|
|
def parse_email(data: Union[bytes, str]) -> Tuple[RawMetadata, Dict[str, List[str]]]:
|
|
"""Parse a distribution's metadata stored as email headers (e.g. from ``METADATA``).
|
|
|
|
This function returns a two-item tuple of dicts. The first dict is of
|
|
recognized fields from the core metadata specification. Fields that can be
|
|
parsed and translated into Python's built-in types are converted
|
|
appropriately. All other fields are left as-is. Fields that are allowed to
|
|
appear multiple times are stored as lists.
|
|
|
|
The second dict contains all other fields from the metadata. This includes
|
|
any unrecognized fields. It also includes any fields which are expected to
|
|
be parsed into a built-in type but were not formatted appropriately. Finally,
|
|
any fields that are expected to appear only once but are repeated are
|
|
included in this dict.
|
|
|
|
"""
|
|
raw: Dict[str, Union[str, List[str], Dict[str, str]]] = {}
|
|
unparsed: Dict[str, List[str]] = {}
|
|
|
|
if isinstance(data, str):
|
|
parsed = email.parser.Parser(policy=email.policy.compat32).parsestr(data)
|
|
else:
|
|
parsed = email.parser.BytesParser(policy=email.policy.compat32).parsebytes(data)
|
|
|
|
# We have to wrap parsed.keys() in a set, because in the case of multiple
|
|
# values for a key (a list), the key will appear multiple times in the
|
|
# list of keys, but we're avoiding that by using get_all().
|
|
for name in frozenset(parsed.keys()):
|
|
# Header names in RFC are case insensitive, so we'll normalize to all
|
|
# lower case to make comparisons easier.
|
|
name = name.lower()
|
|
|
|
# We use get_all() here, even for fields that aren't multiple use,
|
|
# because otherwise someone could have e.g. two Name fields, and we
|
|
# would just silently ignore it rather than doing something about it.
|
|
headers = parsed.get_all(name) or []
|
|
|
|
# The way the email module works when parsing bytes is that it
|
|
# unconditionally decodes the bytes as ascii using the surrogateescape
|
|
# handler. When you pull that data back out (such as with get_all() ),
|
|
# it looks to see if the str has any surrogate escapes, and if it does
|
|
# it wraps it in a Header object instead of returning the string.
|
|
#
|
|
# As such, we'll look for those Header objects, and fix up the encoding.
|
|
value = []
|
|
# Flag if we have run into any issues processing the headers, thus
|
|
# signalling that the data belongs in 'unparsed'.
|
|
valid_encoding = True
|
|
for h in headers:
|
|
# It's unclear if this can return more types than just a Header or
|
|
# a str, so we'll just assert here to make sure.
|
|
assert isinstance(h, (email.header.Header, str))
|
|
|
|
# If it's a header object, we need to do our little dance to get
|
|
# the real data out of it. In cases where there is invalid data
|
|
# we're going to end up with mojibake, but there's no obvious, good
|
|
# way around that without reimplementing parts of the Header object
|
|
# ourselves.
|
|
#
|
|
# That should be fine since, if mojibacked happens, this key is
|
|
# going into the unparsed dict anyways.
|
|
if isinstance(h, email.header.Header):
|
|
# The Header object stores it's data as chunks, and each chunk
|
|
# can be independently encoded, so we'll need to check each
|
|
# of them.
|
|
chunks: List[Tuple[bytes, Optional[str]]] = []
|
|
for bin, encoding in email.header.decode_header(h):
|
|
try:
|
|
bin.decode("utf8", "strict")
|
|
except UnicodeDecodeError:
|
|
# Enable mojibake.
|
|
encoding = "latin1"
|
|
valid_encoding = False
|
|
else:
|
|
encoding = "utf8"
|
|
chunks.append((bin, encoding))
|
|
|
|
# Turn our chunks back into a Header object, then let that
|
|
# Header object do the right thing to turn them into a
|
|
# string for us.
|
|
value.append(str(email.header.make_header(chunks)))
|
|
# This is already a string, so just add it.
|
|
else:
|
|
value.append(h)
|
|
|
|
# We've processed all of our values to get them into a list of str,
|
|
# but we may have mojibake data, in which case this is an unparsed
|
|
# field.
|
|
if not valid_encoding:
|
|
unparsed[name] = value
|
|
continue
|
|
|
|
raw_name = _EMAIL_TO_RAW_MAPPING.get(name)
|
|
if raw_name is None:
|
|
# This is a bit of a weird situation, we've encountered a key that
|
|
# we don't know what it means, so we don't know whether it's meant
|
|
# to be a list or not.
|
|
#
|
|
# Since we can't really tell one way or another, we'll just leave it
|
|
# as a list, even though it may be a single item list, because that's
|
|
# what makes the most sense for email headers.
|
|
unparsed[name] = value
|
|
continue
|
|
|
|
# If this is one of our string fields, then we'll check to see if our
|
|
# value is a list of a single item. If it is then we'll assume that
|
|
# it was emitted as a single string, and unwrap the str from inside
|
|
# the list.
|
|
#
|
|
# If it's any other kind of data, then we haven't the faintest clue
|
|
# what we should parse it as, and we have to just add it to our list
|
|
# of unparsed stuff.
|
|
if raw_name in _STRING_FIELDS and len(value) == 1:
|
|
raw[raw_name] = value[0]
|
|
# If this is one of our list of string fields, then we can just assign
|
|
# the value, since email *only* has strings, and our get_all() call
|
|
# above ensures that this is a list.
|
|
elif raw_name in _LIST_FIELDS:
|
|
raw[raw_name] = value
|
|
# Special Case: Keywords
|
|
# The keywords field is implemented in the metadata spec as a str,
|
|
# but it conceptually is a list of strings, and is serialized using
|
|
# ", ".join(keywords), so we'll do some light data massaging to turn
|
|
# this into what it logically is.
|
|
elif raw_name == "keywords" and len(value) == 1:
|
|
raw[raw_name] = _parse_keywords(value[0])
|
|
# Special Case: Project-URL
|
|
# The project urls is implemented in the metadata spec as a list of
|
|
# specially-formatted strings that represent a key and a value, which
|
|
# is fundamentally a mapping, however the email format doesn't support
|
|
# mappings in a sane way, so it was crammed into a list of strings
|
|
# instead.
|
|
#
|
|
# We will do a little light data massaging to turn this into a map as
|
|
# it logically should be.
|
|
elif raw_name == "project_urls":
|
|
try:
|
|
raw[raw_name] = _parse_project_urls(value)
|
|
except KeyError:
|
|
unparsed[name] = value
|
|
# Nothing that we've done has managed to parse this, so it'll just
|
|
# throw it in our unparseable data and move on.
|
|
else:
|
|
unparsed[name] = value
|
|
|
|
# We need to support getting the Description from the message payload in
|
|
# addition to getting it from the the headers. This does mean, though, there
|
|
# is the possibility of it being set both ways, in which case we put both
|
|
# in 'unparsed' since we don't know which is right.
|
|
try:
|
|
payload = _get_payload(parsed, data)
|
|
except ValueError:
|
|
unparsed.setdefault("description", []).append(
|
|
parsed.get_payload(decode=isinstance(data, bytes))
|
|
)
|
|
else:
|
|
if payload:
|
|
# Check to see if we've already got a description, if so then both
|
|
# it, and this body move to unparseable.
|
|
if "description" in raw:
|
|
description_header = cast(str, raw.pop("description"))
|
|
unparsed.setdefault("description", []).extend(
|
|
[description_header, payload]
|
|
)
|
|
elif "description" in unparsed:
|
|
unparsed["description"].append(payload)
|
|
else:
|
|
raw["description"] = payload
|
|
|
|
# We need to cast our `raw` to a metadata, because a TypedDict only support
|
|
# literal key names, but we're computing our key names on purpose, but the
|
|
# way this function is implemented, our `TypedDict` can only have valid key
|
|
# names.
|
|
return cast(RawMetadata, raw), unparsed
|
|
|
|
|
|
_NOT_FOUND = object()
|
|
|
|
|
|
# Keep the two values in sync.
|
|
_VALID_METADATA_VERSIONS = ["1.0", "1.1", "1.2", "2.1", "2.2", "2.3"]
|
|
_MetadataVersion = Literal["1.0", "1.1", "1.2", "2.1", "2.2", "2.3"]
|
|
|
|
_REQUIRED_ATTRS = frozenset(["metadata_version", "name", "version"])
|
|
|
|
|
|
class _Validator(Generic[T]):
|
|
"""Validate a metadata field.
|
|
|
|
All _process_*() methods correspond to a core metadata field. The method is
|
|
called with the field's raw value. If the raw value is valid it is returned
|
|
in its "enriched" form (e.g. ``version.Version`` for the ``Version`` field).
|
|
If the raw value is invalid, :exc:`InvalidMetadata` is raised (with a cause
|
|
as appropriate).
|
|
"""
|
|
|
|
name: str
|
|
raw_name: str
|
|
added: _MetadataVersion
|
|
|
|
def __init__(
|
|
self,
|
|
*,
|
|
added: _MetadataVersion = "1.0",
|
|
) -> None:
|
|
self.added = added
|
|
|
|
def __set_name__(self, _owner: "Metadata", name: str) -> None:
|
|
self.name = name
|
|
self.raw_name = _RAW_TO_EMAIL_MAPPING[name]
|
|
|
|
def __get__(self, instance: "Metadata", _owner: Type["Metadata"]) -> T:
|
|
# With Python 3.8, the caching can be replaced with functools.cached_property().
|
|
# No need to check the cache as attribute lookup will resolve into the
|
|
# instance's __dict__ before __get__ is called.
|
|
cache = instance.__dict__
|
|
value = instance._raw.get(self.name)
|
|
|
|
# To make the _process_* methods easier, we'll check if the value is None
|
|
# and if this field is NOT a required attribute, and if both of those
|
|
# things are true, we'll skip the the converter. This will mean that the
|
|
# converters never have to deal with the None union.
|
|
if self.name in _REQUIRED_ATTRS or value is not None:
|
|
try:
|
|
converter: Callable[[Any], T] = getattr(self, f"_process_{self.name}")
|
|
except AttributeError:
|
|
pass
|
|
else:
|
|
value = converter(value)
|
|
|
|
cache[self.name] = value
|
|
try:
|
|
del instance._raw[self.name] # type: ignore[misc]
|
|
except KeyError:
|
|
pass
|
|
|
|
return cast(T, value)
|
|
|
|
def _invalid_metadata(
|
|
self, msg: str, cause: Optional[Exception] = None
|
|
) -> InvalidMetadata:
|
|
exc = InvalidMetadata(
|
|
self.raw_name, msg.format_map({"field": repr(self.raw_name)})
|
|
)
|
|
exc.__cause__ = cause
|
|
return exc
|
|
|
|
def _process_metadata_version(self, value: str) -> _MetadataVersion:
|
|
# Implicitly makes Metadata-Version required.
|
|
if value not in _VALID_METADATA_VERSIONS:
|
|
raise self._invalid_metadata(f"{value!r} is not a valid metadata version")
|
|
return cast(_MetadataVersion, value)
|
|
|
|
def _process_name(self, value: str) -> str:
|
|
if not value:
|
|
raise self._invalid_metadata("{field} is a required field")
|
|
# Validate the name as a side-effect.
|
|
try:
|
|
utils.canonicalize_name(value, validate=True)
|
|
except utils.InvalidName as exc:
|
|
raise self._invalid_metadata(
|
|
f"{value!r} is invalid for {{field}}", cause=exc
|
|
)
|
|
else:
|
|
return value
|
|
|
|
def _process_version(self, value: str) -> version_module.Version:
|
|
if not value:
|
|
raise self._invalid_metadata("{field} is a required field")
|
|
try:
|
|
return version_module.parse(value)
|
|
except version_module.InvalidVersion as exc:
|
|
raise self._invalid_metadata(
|
|
f"{value!r} is invalid for {{field}}", cause=exc
|
|
)
|
|
|
|
def _process_summary(self, value: str) -> str:
|
|
"""Check the field contains no newlines."""
|
|
if "\n" in value:
|
|
raise self._invalid_metadata("{field} must be a single line")
|
|
return value
|
|
|
|
def _process_description_content_type(self, value: str) -> str:
|
|
content_types = {"text/plain", "text/x-rst", "text/markdown"}
|
|
message = email.message.EmailMessage()
|
|
message["content-type"] = value
|
|
|
|
content_type, parameters = (
|
|
# Defaults to `text/plain` if parsing failed.
|
|
message.get_content_type().lower(),
|
|
message["content-type"].params,
|
|
)
|
|
# Check if content-type is valid or defaulted to `text/plain` and thus was
|
|
# not parseable.
|
|
if content_type not in content_types or content_type not in value.lower():
|
|
raise self._invalid_metadata(
|
|
f"{{field}} must be one of {list(content_types)}, not {value!r}"
|
|
)
|
|
|
|
charset = parameters.get("charset", "UTF-8")
|
|
if charset != "UTF-8":
|
|
raise self._invalid_metadata(
|
|
f"{{field}} can only specify the UTF-8 charset, not {list(charset)}"
|
|
)
|
|
|
|
markdown_variants = {"GFM", "CommonMark"}
|
|
variant = parameters.get("variant", "GFM") # Use an acceptable default.
|
|
if content_type == "text/markdown" and variant not in markdown_variants:
|
|
raise self._invalid_metadata(
|
|
f"valid Markdown variants for {{field}} are {list(markdown_variants)}, "
|
|
f"not {variant!r}",
|
|
)
|
|
return value
|
|
|
|
def _process_dynamic(self, value: List[str]) -> List[str]:
|
|
for dynamic_field in map(str.lower, value):
|
|
if dynamic_field in {"name", "version", "metadata-version"}:
|
|
raise self._invalid_metadata(
|
|
f"{value!r} is not allowed as a dynamic field"
|
|
)
|
|
elif dynamic_field not in _EMAIL_TO_RAW_MAPPING:
|
|
raise self._invalid_metadata(f"{value!r} is not a valid dynamic field")
|
|
return list(map(str.lower, value))
|
|
|
|
def _process_provides_extra(
|
|
self,
|
|
value: List[str],
|
|
) -> List[utils.NormalizedName]:
|
|
normalized_names = []
|
|
try:
|
|
for name in value:
|
|
normalized_names.append(utils.canonicalize_name(name, validate=True))
|
|
except utils.InvalidName as exc:
|
|
raise self._invalid_metadata(
|
|
f"{name!r} is invalid for {{field}}", cause=exc
|
|
)
|
|
else:
|
|
return normalized_names
|
|
|
|
def _process_requires_python(self, value: str) -> specifiers.SpecifierSet:
|
|
try:
|
|
return specifiers.SpecifierSet(value)
|
|
except specifiers.InvalidSpecifier as exc:
|
|
raise self._invalid_metadata(
|
|
f"{value!r} is invalid for {{field}}", cause=exc
|
|
)
|
|
|
|
def _process_requires_dist(
|
|
self,
|
|
value: List[str],
|
|
) -> List[requirements.Requirement]:
|
|
reqs = []
|
|
try:
|
|
for req in value:
|
|
reqs.append(requirements.Requirement(req))
|
|
except requirements.InvalidRequirement as exc:
|
|
raise self._invalid_metadata(f"{req!r} is invalid for {{field}}", cause=exc)
|
|
else:
|
|
return reqs
|
|
|
|
|
|
class Metadata:
|
|
"""Representation of distribution metadata.
|
|
|
|
Compared to :class:`RawMetadata`, this class provides objects representing
|
|
metadata fields instead of only using built-in types. Any invalid metadata
|
|
will cause :exc:`InvalidMetadata` to be raised (with a
|
|
:py:attr:`~BaseException.__cause__` attribute as appropriate).
|
|
"""
|
|
|
|
_raw: RawMetadata
|
|
|
|
@classmethod
|
|
def from_raw(cls, data: RawMetadata, *, validate: bool = True) -> "Metadata":
|
|
"""Create an instance from :class:`RawMetadata`.
|
|
|
|
If *validate* is true, all metadata will be validated. All exceptions
|
|
related to validation will be gathered and raised as an :class:`ExceptionGroup`.
|
|
"""
|
|
ins = cls()
|
|
ins._raw = data.copy() # Mutations occur due to caching enriched values.
|
|
|
|
if validate:
|
|
exceptions: List[Exception] = []
|
|
try:
|
|
metadata_version = ins.metadata_version
|
|
metadata_age = _VALID_METADATA_VERSIONS.index(metadata_version)
|
|
except InvalidMetadata as metadata_version_exc:
|
|
exceptions.append(metadata_version_exc)
|
|
metadata_version = None
|
|
|
|
# Make sure to check for the fields that are present, the required
|
|
# fields (so their absence can be reported).
|
|
fields_to_check = frozenset(ins._raw) | _REQUIRED_ATTRS
|
|
# Remove fields that have already been checked.
|
|
fields_to_check -= {"metadata_version"}
|
|
|
|
for key in fields_to_check:
|
|
try:
|
|
if metadata_version:
|
|
# Can't use getattr() as that triggers descriptor protocol which
|
|
# will fail due to no value for the instance argument.
|
|
try:
|
|
field_metadata_version = cls.__dict__[key].added
|
|
except KeyError:
|
|
exc = InvalidMetadata(key, f"unrecognized field: {key!r}")
|
|
exceptions.append(exc)
|
|
continue
|
|
field_age = _VALID_METADATA_VERSIONS.index(
|
|
field_metadata_version
|
|
)
|
|
if field_age > metadata_age:
|
|
field = _RAW_TO_EMAIL_MAPPING[key]
|
|
exc = InvalidMetadata(
|
|
field,
|
|
"{field} introduced in metadata version "
|
|
"{field_metadata_version}, not {metadata_version}",
|
|
)
|
|
exceptions.append(exc)
|
|
continue
|
|
getattr(ins, key)
|
|
except InvalidMetadata as exc:
|
|
exceptions.append(exc)
|
|
|
|
if exceptions:
|
|
raise ExceptionGroup("invalid metadata", exceptions)
|
|
|
|
return ins
|
|
|
|
@classmethod
|
|
def from_email(
|
|
cls, data: Union[bytes, str], *, validate: bool = True
|
|
) -> "Metadata":
|
|
"""Parse metadata from email headers.
|
|
|
|
If *validate* is true, the metadata will be validated. All exceptions
|
|
related to validation will be gathered and raised as an :class:`ExceptionGroup`.
|
|
"""
|
|
raw, unparsed = parse_email(data)
|
|
|
|
if validate:
|
|
exceptions: list[Exception] = []
|
|
for unparsed_key in unparsed:
|
|
if unparsed_key in _EMAIL_TO_RAW_MAPPING:
|
|
message = f"{unparsed_key!r} has invalid data"
|
|
else:
|
|
message = f"unrecognized field: {unparsed_key!r}"
|
|
exceptions.append(InvalidMetadata(unparsed_key, message))
|
|
|
|
if exceptions:
|
|
raise ExceptionGroup("unparsed", exceptions)
|
|
|
|
try:
|
|
return cls.from_raw(raw, validate=validate)
|
|
except ExceptionGroup as exc_group:
|
|
raise ExceptionGroup(
|
|
"invalid or unparsed metadata", exc_group.exceptions
|
|
) from None
|
|
|
|
metadata_version: _Validator[_MetadataVersion] = _Validator()
|
|
""":external:ref:`core-metadata-metadata-version`
|
|
(required; validated to be a valid metadata version)"""
|
|
name: _Validator[str] = _Validator()
|
|
""":external:ref:`core-metadata-name`
|
|
(required; validated using :func:`~packaging.utils.canonicalize_name` and its
|
|
*validate* parameter)"""
|
|
version: _Validator[version_module.Version] = _Validator()
|
|
""":external:ref:`core-metadata-version` (required)"""
|
|
dynamic: _Validator[Optional[List[str]]] = _Validator(
|
|
added="2.2",
|
|
)
|
|
""":external:ref:`core-metadata-dynamic`
|
|
(validated against core metadata field names and lowercased)"""
|
|
platforms: _Validator[Optional[List[str]]] = _Validator()
|
|
""":external:ref:`core-metadata-platform`"""
|
|
supported_platforms: _Validator[Optional[List[str]]] = _Validator(added="1.1")
|
|
""":external:ref:`core-metadata-supported-platform`"""
|
|
summary: _Validator[Optional[str]] = _Validator()
|
|
""":external:ref:`core-metadata-summary` (validated to contain no newlines)"""
|
|
description: _Validator[Optional[str]] = _Validator() # TODO 2.1: can be in body
|
|
""":external:ref:`core-metadata-description`"""
|
|
description_content_type: _Validator[Optional[str]] = _Validator(added="2.1")
|
|
""":external:ref:`core-metadata-description-content-type` (validated)"""
|
|
keywords: _Validator[Optional[List[str]]] = _Validator()
|
|
""":external:ref:`core-metadata-keywords`"""
|
|
home_page: _Validator[Optional[str]] = _Validator()
|
|
""":external:ref:`core-metadata-home-page`"""
|
|
download_url: _Validator[Optional[str]] = _Validator(added="1.1")
|
|
""":external:ref:`core-metadata-download-url`"""
|
|
author: _Validator[Optional[str]] = _Validator()
|
|
""":external:ref:`core-metadata-author`"""
|
|
author_email: _Validator[Optional[str]] = _Validator()
|
|
""":external:ref:`core-metadata-author-email`"""
|
|
maintainer: _Validator[Optional[str]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-maintainer`"""
|
|
maintainer_email: _Validator[Optional[str]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-maintainer-email`"""
|
|
license: _Validator[Optional[str]] = _Validator()
|
|
""":external:ref:`core-metadata-license`"""
|
|
classifiers: _Validator[Optional[List[str]]] = _Validator(added="1.1")
|
|
""":external:ref:`core-metadata-classifier`"""
|
|
requires_dist: _Validator[Optional[List[requirements.Requirement]]] = _Validator(
|
|
added="1.2"
|
|
)
|
|
""":external:ref:`core-metadata-requires-dist`"""
|
|
requires_python: _Validator[Optional[specifiers.SpecifierSet]] = _Validator(
|
|
added="1.2"
|
|
)
|
|
""":external:ref:`core-metadata-requires-python`"""
|
|
# Because `Requires-External` allows for non-PEP 440 version specifiers, we
|
|
# don't do any processing on the values.
|
|
requires_external: _Validator[Optional[List[str]]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-requires-external`"""
|
|
project_urls: _Validator[Optional[Dict[str, str]]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-project-url`"""
|
|
# PEP 685 lets us raise an error if an extra doesn't pass `Name` validation
|
|
# regardless of metadata version.
|
|
provides_extra: _Validator[Optional[List[utils.NormalizedName]]] = _Validator(
|
|
added="2.1",
|
|
)
|
|
""":external:ref:`core-metadata-provides-extra`"""
|
|
provides_dist: _Validator[Optional[List[str]]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-provides-dist`"""
|
|
obsoletes_dist: _Validator[Optional[List[str]]] = _Validator(added="1.2")
|
|
""":external:ref:`core-metadata-obsoletes-dist`"""
|
|
requires: _Validator[Optional[List[str]]] = _Validator(added="1.1")
|
|
"""``Requires`` (deprecated)"""
|
|
provides: _Validator[Optional[List[str]]] = _Validator(added="1.1")
|
|
"""``Provides`` (deprecated)"""
|
|
obsoletes: _Validator[Optional[List[str]]] = _Validator(added="1.1")
|
|
"""``Obsoletes`` (deprecated)"""
|