mirror of https://github.com/pypa/pip
142 lines
3.9 KiB
Python
142 lines
3.9 KiB
Python
import posixpath
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import re
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from pip._vendor.six.moves.urllib import parse as urllib_parse
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from pip._internal.download import path_to_url
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from pip._internal.utils.misc import splitext
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from pip._internal.utils.models import KeyBasedCompareMixin
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from pip._internal.wheel import wheel_ext
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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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def __init__(self, url, comes_from=None, requires_python=None):
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"""
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url:
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url of the resource pointed to (href of the link)
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comes_from:
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instance of HTMLPage where the link was found, or string.
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requires_python:
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String containing the `Requires-Python` metadata field, specified
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in PEP 345. This may be specified by a data-requires-python
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attribute in the HTML link tag, as described in PEP 503.
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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.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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super(Link, self).__init__(
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key=(self.url),
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defining_class=Link
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)
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def __str__(self):
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if self.requires_python:
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rp = ' (requires-python:%s)' % 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 '%s (from %s)%s' % (self.url, self.comes_from, rp)
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else:
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return str(self.url)
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def __repr__(self):
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return '<Link %s>' % self
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@property
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def filename(self):
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_, netloc, path, _, _ = urllib_parse.urlsplit(self.url)
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name = posixpath.basename(path.rstrip('/')) or netloc
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name = urllib_parse.unquote(name)
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assert name, ('URL %r produced no filename' % self.url)
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return name
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@property
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def scheme(self):
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return urllib_parse.urlsplit(self.url)[0]
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@property
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def netloc(self):
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return urllib_parse.urlsplit(self.url)[1]
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@property
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def path(self):
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return urllib_parse.unquote(urllib_parse.urlsplit(self.url)[2])
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def splitext(self):
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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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return self.splitext()[1]
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@property
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def url_without_fragment(self):
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scheme, netloc, path, query, fragment = urllib_parse.urlsplit(self.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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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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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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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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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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return posixpath.basename(self.url.split('#', 1)[0].split('?', 1)[0])
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@property
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def is_wheel(self):
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return self.ext == wheel_ext
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@property
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def is_artifact(self):
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"""
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Determines if this points to an actual artifact (e.g. a tarball) or if
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it points to an "abstract" thing like a path or a VCS location.
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"""
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from pip._internal.vcs import vcs
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if self.scheme in vcs.all_schemes:
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return False
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return True
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