mirror of https://github.com/pypa/pip
677 lines
28 KiB
Python
677 lines
28 KiB
Python
from __future__ import absolute_import
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from collections import defaultdict
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import functools
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import itertools
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import logging
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import os
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from pip._vendor import pkg_resources
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from pip._vendor import requests
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from pip.download import (url_to_path, unpack_url)
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from pip.exceptions import (InstallationError, BestVersionAlreadyInstalled,
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DistributionNotFound, PreviousBuildDirError)
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from pip.req.req_install import InstallRequirement
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from pip.utils import (
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display_path, dist_in_usersite, ensure_dir, normalize_path)
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from pip.utils.logging import indent_log
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from pip.vcs import vcs
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logger = logging.getLogger(__name__)
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class Requirements(object):
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def __init__(self):
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self._keys = []
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self._dict = {}
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def keys(self):
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return self._keys
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def values(self):
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return [self._dict[key] for key in self._keys]
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def __contains__(self, item):
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return item in self._keys
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def __setitem__(self, key, value):
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if key not in self._keys:
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self._keys.append(key)
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self._dict[key] = value
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def __getitem__(self, key):
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return self._dict[key]
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def __repr__(self):
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values = ['%s: %s' % (repr(k), repr(self[k])) for k in self.keys()]
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return 'Requirements({%s})' % ', '.join(values)
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class DistAbstraction(object):
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"""Abstracts out the wheel vs non-wheel prepare_files logic.
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The requirements for anything installable are as follows:
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- we must be able to determine the requirement name
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(or we can't correctly handle the non-upgrade case).
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- we must be able to generate a list of run-time dependencies
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without installing any additional packages (or we would
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have to either burn time by doing temporary isolated installs
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or alternatively violate pips 'don't start installing unless
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all requirements are available' rule - neither of which are
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desirable).
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- for packages with setup requirements, we must also be able
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to determine their requirements without installing additional
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packages (for the same reason as run-time dependencies)
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- we must be able to create a Distribution object exposing the
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above metadata.
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"""
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def __init__(self, req_to_install):
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self.req_to_install = req_to_install
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def dist(self, finder):
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"""Return a setuptools Dist object."""
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raise NotImplementedError(self.dist)
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def prep_for_dist(self):
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"""Ensure that we can get a Dist for this requirement."""
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raise NotImplementedError(self.dist)
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def make_abstract_dist(req_to_install):
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"""Factory to make an abstract dist object.
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Preconditions: Either an editable req with a source_dir, or satisfied_by or
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a wheel link, or a non-editable req with a source_dir.
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:return: A concrete DistAbstraction.
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"""
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if req_to_install.editable:
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return IsSDist(req_to_install)
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elif req_to_install.link and req_to_install.link.is_wheel:
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return IsWheel(req_to_install)
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else:
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return IsSDist(req_to_install)
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class IsWheel(DistAbstraction):
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def dist(self, finder):
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return list(pkg_resources.find_distributions(
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self.req_to_install.source_dir))[0]
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def prep_for_dist(self):
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# FIXME:https://github.com/pypa/pip/issues/1112
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pass
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class IsSDist(DistAbstraction):
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def dist(self, finder):
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dist = self.req_to_install.get_dist()
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# FIXME: shouldn't be globally added:
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if dist.has_metadata('dependency_links.txt'):
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finder.add_dependency_links(
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dist.get_metadata_lines('dependency_links.txt')
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)
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return dist
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def prep_for_dist(self):
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self.req_to_install.run_egg_info()
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self.req_to_install.assert_source_matches_version()
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class Installed(DistAbstraction):
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def dist(self, finder):
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return self.req_to_install.satisfied_by
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def prep_for_dist(self):
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pass
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class RequirementSet(object):
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def __init__(self, build_dir, src_dir, download_dir, upgrade=False,
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ignore_installed=False, as_egg=False, target_dir=None,
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ignore_dependencies=False, force_reinstall=False,
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use_user_site=False, session=None, pycompile=True,
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isolated=False, wheel_download_dir=None,
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cache_root=None):
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"""Create a RequirementSet.
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:param wheel_download_dir: Where still-packed .whl files should be
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written to. If None they are written to the download_dir parameter.
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Separate to download_dir to permit only keeping wheel archives for
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pip wheel.
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:param download_dir: Where still packed archives should be written to.
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If None they are not saved, and are deleted immediately after
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unpacking.
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:param cache_root: The root of the pip cache, for passing to
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InstallRequirement.
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"""
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if session is None:
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raise TypeError(
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"RequirementSet() missing 1 required keyword argument: "
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"'session'"
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)
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self.build_dir = build_dir
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self.src_dir = src_dir
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# XXX: download_dir and wheel_download_dir overlap semantically and may
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# be combined if we're willing to have non-wheel archives present in
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# the wheelhouse output by 'pip wheel'.
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self.download_dir = download_dir
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self.upgrade = upgrade
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self.ignore_installed = ignore_installed
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self.force_reinstall = force_reinstall
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self.requirements = Requirements()
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# Mapping of alias: real_name
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self.requirement_aliases = {}
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self.unnamed_requirements = []
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self.ignore_dependencies = ignore_dependencies
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self.successfully_downloaded = []
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self.successfully_installed = []
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self.reqs_to_cleanup = []
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self.as_egg = as_egg
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self.use_user_site = use_user_site
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self.target_dir = target_dir # set from --target option
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self.session = session
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self.pycompile = pycompile
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self.isolated = isolated
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if wheel_download_dir:
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wheel_download_dir = normalize_path(wheel_download_dir)
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self.wheel_download_dir = wheel_download_dir
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self._cache_root = cache_root
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# Maps from install_req -> dependencies_of_install_req
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self._dependencies = defaultdict(list)
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def __str__(self):
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reqs = [req for req in self.requirements.values()
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if not req.comes_from]
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reqs.sort(key=lambda req: req.name.lower())
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return ' '.join([str(req.req) for req in reqs])
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def __repr__(self):
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reqs = [req for req in self.requirements.values()]
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reqs.sort(key=lambda req: req.name.lower())
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reqs_str = ', '.join([str(req.req) for req in reqs])
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return ('<%s object; %d requirement(s): %s>'
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% (self.__class__.__name__, len(reqs), reqs_str))
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def add_requirement(self, install_req, parent_req_name=None):
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"""Add install_req as a requirement to install.
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:param parent_req_name: The name of the requirement that needed this
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added. The name is used because when multiple unnamed requirements
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resolve to the same name, we could otherwise end up with dependency
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links that point outside the Requirements set. parent_req must
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already be added. Note that None implies that this is a user
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supplied requirement, vs an inferred one.
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:return: Additional requirements to scan. That is either [] if
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the requirement is not applicable, or [install_req] if the
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requirement is applicable and has just been added.
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"""
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name = install_req.name
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if not install_req.match_markers():
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logger.debug("Ignore %s: markers %r don't match",
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install_req.name, install_req.markers)
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return []
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install_req.as_egg = self.as_egg
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install_req.use_user_site = self.use_user_site
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install_req.target_dir = self.target_dir
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install_req.pycompile = self.pycompile
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if not name:
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# url or path requirement w/o an egg fragment
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self.unnamed_requirements.append(install_req)
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return [install_req]
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else:
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if parent_req_name is None and self.has_requirement(name):
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raise InstallationError(
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'Double requirement given: %s (already in %s, name=%r)'
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% (install_req, self.get_requirement(name), name))
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if not self.has_requirement(name):
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# Add requirement
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self.requirements[name] = install_req
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# FIXME: what about other normalizations? E.g., _ vs. -?
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if name.lower() != name:
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self.requirement_aliases[name.lower()] = name
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result = [install_req]
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else:
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# Canonicalise to the already-added object
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install_req = self.get_requirement(name)
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# No need to scan, this is a duplicate requirement.
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result = []
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if parent_req_name:
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parent_req = self.get_requirement(parent_req_name)
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self._dependencies[parent_req].append(install_req)
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return result
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def has_requirement(self, project_name):
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for name in project_name, project_name.lower():
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if name in self.requirements or name in self.requirement_aliases:
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return True
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return False
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@property
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def has_requirements(self):
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return list(self.requirements.values()) or self.unnamed_requirements
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@property
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def is_download(self):
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if self.download_dir:
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self.download_dir = os.path.expanduser(self.download_dir)
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if os.path.exists(self.download_dir):
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return True
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else:
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logger.critical('Could not find download directory')
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raise InstallationError(
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"Could not find or access download directory '%s'"
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% display_path(self.download_dir))
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return False
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def get_requirement(self, project_name):
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for name in project_name, project_name.lower():
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if name in self.requirements:
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return self.requirements[name]
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if name in self.requirement_aliases:
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return self.requirements[self.requirement_aliases[name]]
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raise KeyError("No project with the name %r" % project_name)
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def uninstall(self, auto_confirm=False):
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for req in self.requirements.values():
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req.uninstall(auto_confirm=auto_confirm)
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req.commit_uninstall()
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def _walk_req_to_install(self, handler):
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"""Call handler for all pending reqs.
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:param handler: Handle a single requirement. Should take a requirement
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to install. Can optionally return an iterable of additional
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InstallRequirements to cover.
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"""
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# The list() here is to avoid potential mutate-while-iterating bugs.
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discovered_reqs = []
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reqs = itertools.chain(
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list(self.unnamed_requirements), list(self.requirements.values()),
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discovered_reqs)
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for req_to_install in reqs:
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more_reqs = handler(req_to_install)
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if more_reqs:
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discovered_reqs.extend(more_reqs)
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def prepare_files(self, finder):
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"""
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Prepare process. Create temp directories, download and/or unpack files.
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"""
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# make the wheelhouse
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if self.wheel_download_dir:
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ensure_dir(self.wheel_download_dir)
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self._walk_req_to_install(
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functools.partial(self._prepare_file, finder))
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def _check_skip_installed(self, req_to_install, finder):
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"""Check if req_to_install should be skipped.
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This will check if the req is installed, and whether we should upgrade
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or reinstall it, taking into account all the relevant user options.
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After calling this req_to_install will only have satisfied_by set to
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None if the req_to_install is to be upgraded/reinstalled etc. Any
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other value will be a dist recording the current thing installed that
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satisfies the requirement.
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Note that for vcs urls and the like we can't assess skipping in this
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routine - we simply identify that we need to pull the thing down,
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then later on it is pulled down and introspected to assess upgrade/
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reinstalls etc.
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:return: A text reason for why it was skipped, or None.
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"""
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# Check whether to upgrade/reinstall this req or not.
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req_to_install.check_if_exists()
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if req_to_install.satisfied_by:
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skip_reason = 'satisfied (use --upgrade to upgrade)'
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if self.upgrade:
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best_installed = False
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# For link based requirements we have to pull the
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# tree down and inspect to assess the version #, so
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# its handled way down.
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if not (self.force_reinstall or req_to_install.link):
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try:
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finder.find_requirement(req_to_install, self.upgrade)
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except BestVersionAlreadyInstalled:
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skip_reason = 'up-to-date'
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best_installed = True
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except DistributionNotFound:
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# No distribution found, so we squash the
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# error - it will be raised later when we
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# re-try later to do the install.
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# Why don't we just raise here?
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pass
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if not best_installed:
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# don't uninstall conflict if user install and
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# conflict is not user install
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if not (self.use_user_site and not
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dist_in_usersite(req_to_install.satisfied_by)):
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req_to_install.conflicts_with = \
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req_to_install.satisfied_by
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req_to_install.satisfied_by = None
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return skip_reason
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else:
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return None
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def _prepare_file(self, finder, req_to_install):
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"""Prepare a single requirements files.
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:return: A list of addition InstallRequirements to also install.
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"""
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# Tell user what we are doing for this requirement:
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# obtain (editable), skipping, processing (local url), collecting
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# (remote url or package name)
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if req_to_install.editable:
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logger.info('Obtaining %s', req_to_install)
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else:
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# satisfied_by is only evaluated by calling _check_skip_installed,
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# so it must be None here.
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assert req_to_install.satisfied_by is None
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if not self.ignore_installed:
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skip_reason = self._check_skip_installed(
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req_to_install, finder)
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if req_to_install.satisfied_by:
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assert skip_reason is not None, (
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'_check_skip_installed returned None but '
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'req_to_install.satisfied_by is set to %r'
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% (req_to_install.satisfied_by,))
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logger.info(
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'Requirement already %s: %s', skip_reason,
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req_to_install)
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else:
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if (req_to_install.link and
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req_to_install.link.scheme == 'file'):
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path = url_to_path(req_to_install.link.url)
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logger.info('Processing %s', display_path(path))
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else:
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logger.info('Collecting %s', req_to_install)
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with indent_log():
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# ################################ #
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# # vcs update or unpack archive # #
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# ################################ #
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if req_to_install.editable:
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req_to_install.ensure_has_source_dir(self.src_dir)
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req_to_install.update_editable(not self.is_download)
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abstract_dist = make_abstract_dist(req_to_install)
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abstract_dist.prep_for_dist()
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if self.is_download:
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req_to_install.archive(self.download_dir)
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elif req_to_install.satisfied_by:
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abstract_dist = Installed(req_to_install)
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else:
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# @@ if filesystem packages are not marked
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# editable in a req, a non deterministic error
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# occurs when the script attempts to unpack the
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# build directory
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req_to_install.ensure_has_source_dir(self.build_dir)
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# If a checkout exists, it's unwise to keep going. version
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# inconsistencies are logged later, but do not fail the
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# installation.
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# FIXME: this won't upgrade when there's an existing
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# package unpacked in `req_to_install.source_dir`
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if os.path.exists(
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os.path.join(req_to_install.source_dir, 'setup.py')):
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raise PreviousBuildDirError(
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"pip can't proceed with requirements '%s' due to a"
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" pre-existing build directory (%s). This is "
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"likely due to a previous installation that failed"
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". pip is being responsible and not assuming it "
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"can delete this. Please delete it and try again."
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% (req_to_install, req_to_install.source_dir)
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)
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req_to_install.populate_link(finder, self.upgrade)
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# We can't hit this spot and have populate_link return None.
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# req_to_install.satisfied_by is None here (because we're
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# guarded) and upgrade has no impact except when satisfied_by
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# is not None.
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# Then inside find_requirement existing_applicable -> False
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# If no new versions are found, DistributionNotFound is raised,
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# otherwise a result is guaranteed.
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assert req_to_install.link
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try:
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download_dir = self.download_dir
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# We always delete unpacked sdists after pip ran.
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autodelete_unpacked = True
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if req_to_install.link.is_wheel \
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and self.wheel_download_dir:
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# when doing 'pip wheel` we download wheels to a
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# dedicated dir.
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download_dir = self.wheel_download_dir
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if req_to_install.link.is_wheel:
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if download_dir:
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# When downloading, we only unpack wheels to get
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# metadata.
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autodelete_unpacked = True
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else:
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# When installing a wheel, we use the unpacked
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# wheel.
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autodelete_unpacked = False
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unpack_url(
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req_to_install.link, req_to_install.source_dir,
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download_dir, autodelete_unpacked,
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session=self.session)
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except requests.HTTPError as exc:
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logger.critical(
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'Could not install requirement %s because '
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'of error %s',
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req_to_install,
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exc,
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)
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raise InstallationError(
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'Could not install requirement %s because '
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'of HTTP error %s for URL %s' %
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(req_to_install, exc, req_to_install.link)
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)
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abstract_dist = make_abstract_dist(req_to_install)
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abstract_dist.prep_for_dist()
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if self.is_download:
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# Make a .zip of the source_dir we already created.
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if req_to_install.link.scheme in vcs.all_schemes:
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req_to_install.archive(self.download_dir)
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# req_to_install.req is only avail after unpack for URL
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# pkgs repeat check_if_exists to uninstall-on-upgrade
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# (#14)
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if not self.ignore_installed:
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req_to_install.check_if_exists()
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if req_to_install.satisfied_by:
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if self.upgrade or self.ignore_installed:
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# don't uninstall conflict if user install and
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# conflict is not user install
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if not (self.use_user_site and not
|
|
dist_in_usersite(
|
|
req_to_install.satisfied_by)):
|
|
req_to_install.conflicts_with = \
|
|
req_to_install.satisfied_by
|
|
req_to_install.satisfied_by = None
|
|
else:
|
|
logger.info(
|
|
'Requirement already satisfied (use '
|
|
'--upgrade to upgrade): %s',
|
|
req_to_install,
|
|
)
|
|
|
|
# ###################### #
|
|
# # parse dependencies # #
|
|
# ###################### #
|
|
dist = abstract_dist.dist(finder)
|
|
more_reqs = []
|
|
|
|
def add_req(subreq):
|
|
sub_install_req = InstallRequirement(
|
|
str(subreq),
|
|
req_to_install,
|
|
isolated=self.isolated,
|
|
cache_root=self._cache_root,
|
|
)
|
|
more_reqs.extend(self.add_requirement(
|
|
sub_install_req, req_to_install.name))
|
|
|
|
# We add req_to_install before its dependencies, so that we
|
|
# can refer to it when adding dependencies.
|
|
if not self.has_requirement(req_to_install.name):
|
|
# 'unnamed' requirements will get added here
|
|
self.add_requirement(req_to_install, None)
|
|
|
|
if not self.ignore_dependencies:
|
|
if (req_to_install.extras):
|
|
logger.debug(
|
|
"Installing extra requirements: %r",
|
|
','.join(req_to_install.extras),
|
|
)
|
|
missing_requested = sorted(
|
|
set(req_to_install.extras) - set(dist.extras)
|
|
)
|
|
for missing in missing_requested:
|
|
logger.warning(
|
|
'%s does not provide the extra \'%s\'',
|
|
dist, missing
|
|
)
|
|
|
|
available_requested = sorted(
|
|
set(dist.extras) & set(req_to_install.extras)
|
|
)
|
|
for subreq in dist.requires(available_requested):
|
|
add_req(subreq)
|
|
|
|
# cleanup tmp src
|
|
self.reqs_to_cleanup.append(req_to_install)
|
|
|
|
if not req_to_install.editable and not req_to_install.satisfied_by:
|
|
# XXX: --no-install leads this to report 'Successfully
|
|
# downloaded' for only non-editable reqs, even though we took
|
|
# action on them.
|
|
self.successfully_downloaded.append(req_to_install)
|
|
|
|
return more_reqs
|
|
|
|
def cleanup_files(self):
|
|
"""Clean up files, remove builds."""
|
|
logger.debug('Cleaning up...')
|
|
with indent_log():
|
|
for req in self.reqs_to_cleanup:
|
|
req.remove_temporary_source()
|
|
|
|
def _to_install(self):
|
|
"""Create the installation order.
|
|
|
|
The installation order is topological - requirements are installed
|
|
before the requiring thing. We break cycles at an arbitrary point,
|
|
and make no other guarantees.
|
|
"""
|
|
# The current implementation, which we may change at any point
|
|
# installs the user specified things in the order given, except when
|
|
# dependencies must come earlier to achieve topological order.
|
|
order = []
|
|
ordered_reqs = set()
|
|
|
|
def schedule(req):
|
|
if req.satisfied_by or req in ordered_reqs:
|
|
return
|
|
ordered_reqs.add(req)
|
|
for dep in self._dependencies[req]:
|
|
schedule(dep)
|
|
order.append(req)
|
|
for install_req in self.requirements.values():
|
|
schedule(install_req)
|
|
return order
|
|
|
|
def install(self, install_options, global_options=(), *args, **kwargs):
|
|
"""
|
|
Install everything in this set (after having downloaded and unpacked
|
|
the packages)
|
|
"""
|
|
to_install = self._to_install()
|
|
|
|
# DISTRIBUTE TO SETUPTOOLS UPGRADE HACK (1 of 3 parts)
|
|
# move the distribute-0.7.X wrapper to the end because it does not
|
|
# install a setuptools package. by moving it to the end, we ensure it's
|
|
# setuptools dependency is handled first, which will provide the
|
|
# setuptools package
|
|
# TODO: take this out later
|
|
distribute_req = pkg_resources.Requirement.parse("distribute>=0.7")
|
|
for req in to_install:
|
|
if (req.name == 'distribute' and
|
|
req.installed_version is not None and
|
|
req.installed_version in distribute_req):
|
|
to_install.remove(req)
|
|
to_install.append(req)
|
|
|
|
if to_install:
|
|
logger.info(
|
|
'Installing collected packages: %s',
|
|
', '.join([req.name for req in to_install]),
|
|
)
|
|
|
|
with indent_log():
|
|
for requirement in to_install:
|
|
|
|
# DISTRIBUTE TO SETUPTOOLS UPGRADE HACK (1 of 3 parts)
|
|
# when upgrading from distribute-0.6.X to the new merged
|
|
# setuptools in py2, we need to force setuptools to uninstall
|
|
# distribute. In py3, which is always using distribute, this
|
|
# conversion is already happening in distribute's
|
|
# pkg_resources. It's ok *not* to check if setuptools>=0.7
|
|
# because if someone were actually trying to ugrade from
|
|
# distribute to setuptools 0.6.X, then all this could do is
|
|
# actually help, although that upgade path was certainly never
|
|
# "supported"
|
|
# TODO: remove this later
|
|
if requirement.name == 'setuptools':
|
|
try:
|
|
# only uninstall distribute<0.7. For >=0.7, setuptools
|
|
# will also be present, and that's what we need to
|
|
# uninstall
|
|
distribute_requirement = \
|
|
pkg_resources.Requirement.parse("distribute<0.7")
|
|
existing_distribute = \
|
|
pkg_resources.get_distribution("distribute")
|
|
if existing_distribute in distribute_requirement:
|
|
requirement.conflicts_with = existing_distribute
|
|
except pkg_resources.DistributionNotFound:
|
|
# distribute wasn't installed, so nothing to do
|
|
pass
|
|
|
|
if requirement.conflicts_with:
|
|
logger.info(
|
|
'Found existing installation: %s',
|
|
requirement.conflicts_with,
|
|
)
|
|
with indent_log():
|
|
requirement.uninstall(auto_confirm=True)
|
|
try:
|
|
requirement.install(
|
|
install_options,
|
|
global_options,
|
|
*args,
|
|
**kwargs
|
|
)
|
|
except:
|
|
# if install did not succeed, rollback previous uninstall
|
|
if (requirement.conflicts_with and not
|
|
requirement.install_succeeded):
|
|
requirement.rollback_uninstall()
|
|
raise
|
|
else:
|
|
if (requirement.conflicts_with and
|
|
requirement.install_succeeded):
|
|
requirement.commit_uninstall()
|
|
requirement.remove_temporary_source()
|
|
|
|
self.successfully_installed = to_install
|