246 lines
7.2 KiB
Python
246 lines
7.2 KiB
Python
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import os
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import posixpath
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import re
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import urllib.parse
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from pip._internal.utils.filetypes import WHEEL_EXTENSION
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from pip._internal.utils.misc import (
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redact_auth_from_url,
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split_auth_from_netloc,
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splitext,
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)
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from pip._internal.utils.models import KeyBasedCompareMixin
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from pip._internal.utils.typing import MYPY_CHECK_RUNNING
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from pip._internal.utils.urls import path_to_url, url_to_path
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if MYPY_CHECK_RUNNING:
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from typing import Optional, Tuple, Union
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from pip._internal.index.collector import HTMLPage
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from pip._internal.utils.hashes import Hashes
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class Link(KeyBasedCompareMixin):
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"""Represents a parsed link from a Package Index's simple URL
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"""
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__slots__ = [
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"_parsed_url",
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"_url",
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"comes_from",
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"requires_python",
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"yanked_reason",
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"cache_link_parsing",
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]
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def __init__(
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self,
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url, # type: str
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comes_from=None, # type: Optional[Union[str, HTMLPage]]
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requires_python=None, # type: Optional[str]
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yanked_reason=None, # type: Optional[str]
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cache_link_parsing=True, # type: bool
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):
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# type: (...) -> None
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"""
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:param url: url of the resource pointed to (href of the link)
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:param comes_from: instance of HTMLPage where the link was found,
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or string.
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:param requires_python: String containing the `Requires-Python`
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metadata field, specified in PEP 345. This may be specified by
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a data-requires-python attribute in the HTML link tag, as
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described in PEP 503.
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:param yanked_reason: the reason the file has been yanked, if the
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file has been yanked, or None if the file hasn't been yanked.
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This is the value of the "data-yanked" attribute, if present, in
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a simple repository HTML link. If the file has been yanked but
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no reason was provided, this should be the empty string. See
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PEP 592 for more information and the specification.
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:param cache_link_parsing: A flag that is used elsewhere to determine
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whether resources retrieved from this link
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should be cached. PyPI index urls should
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generally have this set to False, for
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example.
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"""
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# url can be a UNC windows share
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if url.startswith('\\\\'):
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url = path_to_url(url)
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self._parsed_url = urllib.parse.urlsplit(url)
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# Store the url as a private attribute to prevent accidentally
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# trying to set a new value.
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self._url = url
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self.comes_from = comes_from
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self.requires_python = requires_python if requires_python else None
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self.yanked_reason = yanked_reason
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super().__init__(key=url, defining_class=Link)
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self.cache_link_parsing = cache_link_parsing
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def __str__(self):
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# type: () -> str
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if self.requires_python:
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rp = f' (requires-python:{self.requires_python})'
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else:
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rp = ''
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if self.comes_from:
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return '{} (from {}){}'.format(
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redact_auth_from_url(self._url), self.comes_from, rp)
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else:
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return redact_auth_from_url(str(self._url))
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def __repr__(self):
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# type: () -> str
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return f'<Link {self}>'
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@property
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def url(self):
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# type: () -> str
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return self._url
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@property
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def filename(self):
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# type: () -> str
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path = self.path.rstrip('/')
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name = posixpath.basename(path)
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if not name:
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# Make sure we don't leak auth information if the netloc
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# includes a username and password.
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netloc, user_pass = split_auth_from_netloc(self.netloc)
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return netloc
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name = urllib.parse.unquote(name)
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assert name, (
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'URL {self._url!r} produced no filename'.format(**locals()))
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return name
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@property
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def file_path(self):
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# type: () -> str
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return url_to_path(self.url)
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@property
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def scheme(self):
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# type: () -> str
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return self._parsed_url.scheme
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@property
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def netloc(self):
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# type: () -> str
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"""
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This can contain auth information.
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"""
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return self._parsed_url.netloc
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@property
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def path(self):
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# type: () -> str
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return urllib.parse.unquote(self._parsed_url.path)
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def splitext(self):
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# type: () -> Tuple[str, str]
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return splitext(posixpath.basename(self.path.rstrip('/')))
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@property
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def ext(self):
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# type: () -> str
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return self.splitext()[1]
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@property
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def url_without_fragment(self):
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# type: () -> str
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scheme, netloc, path, query, fragment = self._parsed_url
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return urllib.parse.urlunsplit((scheme, netloc, path, query, None))
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_egg_fragment_re = re.compile(r'[#&]egg=([^&]*)')
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@property
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def egg_fragment(self):
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# type: () -> Optional[str]
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match = self._egg_fragment_re.search(self._url)
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if not match:
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return None
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return match.group(1)
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_subdirectory_fragment_re = re.compile(r'[#&]subdirectory=([^&]*)')
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@property
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def subdirectory_fragment(self):
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# type: () -> Optional[str]
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match = self._subdirectory_fragment_re.search(self._url)
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if not match:
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return None
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return match.group(1)
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_hash_re = re.compile(
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r'(sha1|sha224|sha384|sha256|sha512|md5)=([a-f0-9]+)'
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)
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@property
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def hash(self):
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# type: () -> Optional[str]
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match = self._hash_re.search(self._url)
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if match:
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return match.group(2)
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return None
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@property
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def hash_name(self):
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# type: () -> Optional[str]
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match = self._hash_re.search(self._url)
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if match:
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return match.group(1)
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return None
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@property
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def show_url(self):
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# type: () -> str
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return posixpath.basename(self._url.split('#', 1)[0].split('?', 1)[0])
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@property
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def is_file(self):
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# type: () -> bool
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return self.scheme == 'file'
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def is_existing_dir(self):
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# type: () -> bool
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return self.is_file and os.path.isdir(self.file_path)
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@property
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def is_wheel(self):
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# type: () -> bool
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return self.ext == WHEEL_EXTENSION
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@property
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def is_vcs(self):
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# type: () -> bool
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from pip._internal.vcs import vcs
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return self.scheme in vcs.all_schemes
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@property
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def is_yanked(self):
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# type: () -> bool
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return self.yanked_reason is not None
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@property
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def has_hash(self):
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# type: () -> bool
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return self.hash_name is not None
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def is_hash_allowed(self, hashes):
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# type: (Optional[Hashes]) -> bool
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"""
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Return True if the link has a hash and it is allowed.
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"""
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if hashes is None or not self.has_hash:
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return False
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# Assert non-None so mypy knows self.hash_name and self.hash are str.
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assert self.hash_name is not None
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assert self.hash is not None
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return hashes.is_hash_allowed(self.hash_name, hex_digest=self.hash)
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