You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
289 lines
9.7 KiB
Python
289 lines
9.7 KiB
Python
import functools
|
|
import logging
|
|
import os
|
|
import posixpath
|
|
import re
|
|
import urllib.parse
|
|
from typing import TYPE_CHECKING, Dict, List, NamedTuple, Optional, Tuple, Union
|
|
|
|
from pip._internal.utils.filetypes import WHEEL_EXTENSION
|
|
from pip._internal.utils.hashes import Hashes
|
|
from pip._internal.utils.misc import (
|
|
redact_auth_from_url,
|
|
split_auth_from_netloc,
|
|
splitext,
|
|
)
|
|
from pip._internal.utils.models import KeyBasedCompareMixin
|
|
from pip._internal.utils.urls import path_to_url, url_to_path
|
|
|
|
if TYPE_CHECKING:
|
|
from pip._internal.index.collector import HTMLPage
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
_SUPPORTED_HASHES = ("sha1", "sha224", "sha384", "sha256", "sha512", "md5")
|
|
|
|
|
|
class Link(KeyBasedCompareMixin):
|
|
"""Represents a parsed link from a Package Index's simple URL
|
|
"""
|
|
|
|
__slots__ = [
|
|
"_parsed_url",
|
|
"_url",
|
|
"comes_from",
|
|
"requires_python",
|
|
"yanked_reason",
|
|
"cache_link_parsing",
|
|
]
|
|
|
|
def __init__(
|
|
self,
|
|
url: str,
|
|
comes_from: Optional[Union[str, "HTMLPage"]] = None,
|
|
requires_python: Optional[str] = None,
|
|
yanked_reason: Optional[str] = None,
|
|
cache_link_parsing: bool = True,
|
|
) -> None:
|
|
"""
|
|
:param url: url of the resource pointed to (href of the link)
|
|
:param comes_from: instance of HTMLPage where the link was found,
|
|
or string.
|
|
:param requires_python: String containing the `Requires-Python`
|
|
metadata field, specified in PEP 345. This may be specified by
|
|
a data-requires-python attribute in the HTML link tag, as
|
|
described in PEP 503.
|
|
:param yanked_reason: the reason the file has been yanked, if the
|
|
file has been yanked, or None if the file hasn't been yanked.
|
|
This is the value of the "data-yanked" attribute, if present, in
|
|
a simple repository HTML link. If the file has been yanked but
|
|
no reason was provided, this should be the empty string. See
|
|
PEP 592 for more information and the specification.
|
|
:param cache_link_parsing: A flag that is used elsewhere to determine
|
|
whether resources retrieved from this link
|
|
should be cached. PyPI index urls should
|
|
generally have this set to False, for
|
|
example.
|
|
"""
|
|
|
|
# url can be a UNC windows share
|
|
if url.startswith('\\\\'):
|
|
url = path_to_url(url)
|
|
|
|
self._parsed_url = urllib.parse.urlsplit(url)
|
|
# Store the url as a private attribute to prevent accidentally
|
|
# trying to set a new value.
|
|
self._url = url
|
|
|
|
self.comes_from = comes_from
|
|
self.requires_python = requires_python if requires_python else None
|
|
self.yanked_reason = yanked_reason
|
|
|
|
super().__init__(key=url, defining_class=Link)
|
|
|
|
self.cache_link_parsing = cache_link_parsing
|
|
|
|
def __str__(self) -> str:
|
|
if self.requires_python:
|
|
rp = f' (requires-python:{self.requires_python})'
|
|
else:
|
|
rp = ''
|
|
if self.comes_from:
|
|
return '{} (from {}){}'.format(
|
|
redact_auth_from_url(self._url), self.comes_from, rp)
|
|
else:
|
|
return redact_auth_from_url(str(self._url))
|
|
|
|
def __repr__(self) -> str:
|
|
return f'<Link {self}>'
|
|
|
|
@property
|
|
def url(self) -> str:
|
|
return self._url
|
|
|
|
@property
|
|
def filename(self) -> str:
|
|
path = self.path.rstrip('/')
|
|
name = posixpath.basename(path)
|
|
if not name:
|
|
# Make sure we don't leak auth information if the netloc
|
|
# includes a username and password.
|
|
netloc, user_pass = split_auth_from_netloc(self.netloc)
|
|
return netloc
|
|
|
|
name = urllib.parse.unquote(name)
|
|
assert name, f'URL {self._url!r} produced no filename'
|
|
return name
|
|
|
|
@property
|
|
def file_path(self) -> str:
|
|
return url_to_path(self.url)
|
|
|
|
@property
|
|
def scheme(self) -> str:
|
|
return self._parsed_url.scheme
|
|
|
|
@property
|
|
def netloc(self) -> str:
|
|
"""
|
|
This can contain auth information.
|
|
"""
|
|
return self._parsed_url.netloc
|
|
|
|
@property
|
|
def path(self) -> str:
|
|
return urllib.parse.unquote(self._parsed_url.path)
|
|
|
|
def splitext(self) -> Tuple[str, str]:
|
|
return splitext(posixpath.basename(self.path.rstrip('/')))
|
|
|
|
@property
|
|
def ext(self) -> str:
|
|
return self.splitext()[1]
|
|
|
|
@property
|
|
def url_without_fragment(self) -> str:
|
|
scheme, netloc, path, query, fragment = self._parsed_url
|
|
return urllib.parse.urlunsplit((scheme, netloc, path, query, ''))
|
|
|
|
_egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
|
|
|
|
@property
|
|
def egg_fragment(self) -> Optional[str]:
|
|
match = self._egg_fragment_re.search(self._url)
|
|
if not match:
|
|
return None
|
|
return match.group(1)
|
|
|
|
_subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
|
|
|
|
@property
|
|
def subdirectory_fragment(self) -> Optional[str]:
|
|
match = self._subdirectory_fragment_re.search(self._url)
|
|
if not match:
|
|
return None
|
|
return match.group(1)
|
|
|
|
_hash_re = re.compile(
|
|
r'({choices})=([a-f0-9]+)'.format(choices="|".join(_SUPPORTED_HASHES))
|
|
)
|
|
|
|
@property
|
|
def hash(self) -> Optional[str]:
|
|
match = self._hash_re.search(self._url)
|
|
if match:
|
|
return match.group(2)
|
|
return None
|
|
|
|
@property
|
|
def hash_name(self) -> Optional[str]:
|
|
match = self._hash_re.search(self._url)
|
|
if match:
|
|
return match.group(1)
|
|
return None
|
|
|
|
@property
|
|
def show_url(self) -> str:
|
|
return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0])
|
|
|
|
@property
|
|
def is_file(self) -> bool:
|
|
return self.scheme == 'file'
|
|
|
|
def is_existing_dir(self) -> bool:
|
|
return self.is_file and os.path.isdir(self.file_path)
|
|
|
|
@property
|
|
def is_wheel(self) -> bool:
|
|
return self.ext == WHEEL_EXTENSION
|
|
|
|
@property
|
|
def is_vcs(self) -> bool:
|
|
from pip._internal.vcs import vcs
|
|
|
|
return self.scheme in vcs.all_schemes
|
|
|
|
@property
|
|
def is_yanked(self) -> bool:
|
|
return self.yanked_reason is not None
|
|
|
|
@property
|
|
def has_hash(self) -> bool:
|
|
return self.hash_name is not None
|
|
|
|
def is_hash_allowed(self, hashes: Optional[Hashes]) -> bool:
|
|
"""
|
|
Return True if the link has a hash and it is allowed.
|
|
"""
|
|
if hashes is None or not self.has_hash:
|
|
return False
|
|
# Assert non-None so mypy knows self.hash_name and self.hash are str.
|
|
assert self.hash_name is not None
|
|
assert self.hash is not None
|
|
|
|
return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)
|
|
|
|
|
|
class _CleanResult(NamedTuple):
|
|
"""Convert link for equivalency check.
|
|
|
|
This is used in the resolver to check whether two URL-specified requirements
|
|
likely point to the same distribution and can be considered equivalent. This
|
|
equivalency logic avoids comparing URLs literally, which can be too strict
|
|
(e.g. "a=1&b=2" vs "b=2&a=1") and produce conflicts unexpecting to users.
|
|
|
|
Currently this does three things:
|
|
|
|
1. Drop the basic auth part. This is technically wrong since a server can
|
|
serve different content based on auth, but if it does that, it is even
|
|
impossible to guarantee two URLs without auth are equivalent, since
|
|
the user can input different auth information when prompted. So the
|
|
practical solution is to assume the auth doesn't affect the response.
|
|
2. Parse the query to avoid the ordering issue. Note that ordering under the
|
|
same key in the query are NOT cleaned; i.e. "a=1&a=2" and "a=2&a=1" are
|
|
still considered different.
|
|
3. Explicitly drop most of the fragment part, except ``subdirectory=`` and
|
|
hash values, since it should have no impact the downloaded content. Note
|
|
that this drops the "egg=" part historically used to denote the requested
|
|
project (and extras), which is wrong in the strictest sense, but too many
|
|
people are supplying it inconsistently to cause superfluous resolution
|
|
conflicts, so we choose to also ignore them.
|
|
"""
|
|
|
|
parsed: urllib.parse.SplitResult
|
|
query: Dict[str, List[str]]
|
|
subdirectory: str
|
|
hashes: Dict[str, str]
|
|
|
|
@classmethod
|
|
def from_link(cls, link: Link) -> "_CleanResult":
|
|
parsed = link._parsed_url
|
|
netloc = parsed.netloc.rsplit("@", 1)[-1]
|
|
# According to RFC 8089, an empty host in file: means localhost.
|
|
if parsed.scheme == "file" and not netloc:
|
|
netloc = "localhost"
|
|
fragment = urllib.parse.parse_qs(parsed.fragment)
|
|
if "egg" in fragment:
|
|
logger.debug("Ignoring egg= fragment in %s", link)
|
|
try:
|
|
# If there are multiple subdirectory values, use the first one.
|
|
# This matches the behavior of Link.subdirectory_fragment.
|
|
subdirectory = fragment["subdirectory"][0]
|
|
except (IndexError, KeyError):
|
|
subdirectory = ""
|
|
# If there are multiple hash values under the same algorithm, use the
|
|
# first one. This matches the behavior of Link.hash_value.
|
|
hashes = {k: fragment[k][0] for k in _SUPPORTED_HASHES if k in fragment}
|
|
return cls(
|
|
parsed=parsed._replace(netloc=netloc, query="", fragment=""),
|
|
query=urllib.parse.parse_qs(parsed.query),
|
|
subdirectory=subdirectory,
|
|
hashes=hashes,
|
|
)
|
|
|
|
|
|
@functools.lru_cache(maxsize=None)
|
|
def links_equivalent(link1: Link, link2: Link) -> bool:
|
|
return _CleanResult.from_link(link1) == _CleanResult.from_link(link2)
|