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10
lib/python3.5/site-packages/pip/req/__init__.py Normal file
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from __future__ import absolute_import
from .req_install import InstallRequirement
from .req_set import RequirementSet, Requirements
from .req_file import parse_requirements
__all__ = [
"RequirementSet", "Requirements", "InstallRequirement",
"parse_requirements",
]

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lib/python3.5/site-packages/pip/req/req_file.py Normal file
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"""
Requirements file parsing
"""
from __future__ import absolute_import
import os
import re
import shlex
import optparse
from pip._vendor.six.moves.urllib import parse as urllib_parse
from pip._vendor.six.moves import filterfalse
import pip
from pip.download import get_file_content
from pip.req.req_install import InstallRequirement
from pip.exceptions import (RequirementsFileParseError)
from pip.utils import normalize_name
from pip import cmdoptions
__all__ = ['parse_requirements']
SCHEME_RE = re.compile(r'^(http|https|file):', re.I)
COMMENT_RE = re.compile(r'(^|\s)+#.*$')
SUPPORTED_OPTIONS = [
cmdoptions.constraints,
cmdoptions.editable,
cmdoptions.requirements,
cmdoptions.no_index,
cmdoptions.index_url,
cmdoptions.find_links,
cmdoptions.extra_index_url,
cmdoptions.allow_external,
cmdoptions.allow_all_external,
cmdoptions.no_allow_external,
cmdoptions.allow_unsafe,
cmdoptions.no_allow_unsafe,
cmdoptions.use_wheel,
cmdoptions.no_use_wheel,
cmdoptions.always_unzip,
cmdoptions.no_binary,
cmdoptions.only_binary,
]
# options to be passed to requirements
SUPPORTED_OPTIONS_REQ = [
cmdoptions.install_options,
cmdoptions.global_options
]
# the 'dest' string values
SUPPORTED_OPTIONS_REQ_DEST = [o().dest for o in SUPPORTED_OPTIONS_REQ]
def parse_requirements(filename, finder=None, comes_from=None, options=None,
session=None, constraint=False, wheel_cache=None):
"""Parse a requirements file and yield InstallRequirement instances.
:param filename: Path or url of requirements file.
:param finder: Instance of pip.index.PackageFinder.
:param comes_from: Origin description of requirements.
:param options: Global options.
:param session: Instance of pip.download.PipSession.
:param constraint: If true, parsing a constraint file rather than
requirements file.
:param wheel_cache: Instance of pip.wheel.WheelCache
"""
if session is None:
raise TypeError(
"parse_requirements() missing 1 required keyword argument: "
"'session'"
)
_, content = get_file_content(
filename, comes_from=comes_from, session=session
)
lines = content.splitlines()
lines = ignore_comments(lines)
lines = join_lines(lines)
lines = skip_regex(lines, options)
for line_number, line in enumerate(lines, 1):
req_iter = process_line(line, filename, line_number, finder,
comes_from, options, session, wheel_cache,
constraint=constraint)
for req in req_iter:
yield req
def process_line(line, filename, line_number, finder=None, comes_from=None,
options=None, session=None, wheel_cache=None,
constraint=False):
"""Process a single requirements line; This can result in creating/yielding
requirements, or updating the finder.
For lines that contain requirements, the only options that have an effect
are from SUPPORTED_OPTIONS_REQ, and they are scoped to the
requirement. Other options from SUPPORTED_OPTIONS may be present, but are
ignored.
For lines that do not contain requirements, the only options that have an
effect are from SUPPORTED_OPTIONS. Options from SUPPORTED_OPTIONS_REQ may
be present, but are ignored. These lines may contain multiple options
(although our docs imply only one is supported), and all our parsed and
affect the finder.
:param constraint: If True, parsing a constraints file.
"""
parser = build_parser()
defaults = parser.get_default_values()
defaults.index_url = None
if finder:
# `finder.format_control` will be updated during parsing
defaults.format_control = finder.format_control
args_str, options_str = break_args_options(line)
opts, _ = parser.parse_args(shlex.split(options_str), defaults)
# preserve for the nested code path
line_comes_from = '%s %s (line %s)' % (
'-c' if constraint else '-r', filename, line_number)
# yield a line requirement
if args_str:
isolated = options.isolated_mode if options else False
if options:
cmdoptions.check_install_build_global(options, opts)
# get the options that apply to requirements
req_options = {}
for dest in SUPPORTED_OPTIONS_REQ_DEST:
if dest in opts.__dict__ and opts.__dict__[dest]:
req_options[dest] = opts.__dict__[dest]
yield InstallRequirement.from_line(
args_str, line_comes_from, constraint=constraint,
isolated=isolated, options=req_options, wheel_cache=wheel_cache
)
# yield an editable requirement
elif opts.editables:
isolated = options.isolated_mode if options else False
default_vcs = options.default_vcs if options else None
yield InstallRequirement.from_editable(
opts.editables[0], comes_from=line_comes_from,
constraint=constraint, default_vcs=default_vcs, isolated=isolated,
wheel_cache=wheel_cache
)
# parse a nested requirements file
elif opts.requirements or opts.constraints:
if opts.requirements:
req_path = opts.requirements[0]
nested_constraint = False
else:
req_path = opts.constraints[0]
nested_constraint = True
# original file is over http
if SCHEME_RE.search(filename):
# do a url join so relative paths work
req_path = urllib_parse.urljoin(filename, req_path)
# original file and nested file are paths
elif not SCHEME_RE.search(req_path):
# do a join so relative paths work
req_dir = os.path.dirname(filename)
req_path = os.path.join(os.path.dirname(filename), req_path)
# TODO: Why not use `comes_from='-r {} (line {})'` here as well?
parser = parse_requirements(
req_path, finder, comes_from, options, session,
constraint=nested_constraint, wheel_cache=wheel_cache
)
for req in parser:
yield req
# set finder options
elif finder:
if opts.index_url:
finder.index_urls = [opts.index_url]
if opts.use_wheel is False:
finder.use_wheel = False
pip.index.fmt_ctl_no_use_wheel(finder.format_control)
if opts.no_index is True:
finder.index_urls = []
if opts.allow_all_external:
finder.allow_all_external = opts.allow_all_external
if opts.extra_index_urls:
finder.index_urls.extend(opts.extra_index_urls)
if opts.allow_external:
finder.allow_external |= set(
[normalize_name(v).lower() for v in opts.allow_external])
if opts.allow_unverified:
# Remove after 7.0
finder.allow_unverified |= set(
[normalize_name(v).lower() for v in opts.allow_unverified])
if opts.find_links:
# FIXME: it would be nice to keep track of the source
# of the find_links: support a find-links local path
# relative to a requirements file.
value = opts.find_links[0]
req_dir = os.path.dirname(os.path.abspath(filename))
relative_to_reqs_file = os.path.join(req_dir, value)
if os.path.exists(relative_to_reqs_file):
value = relative_to_reqs_file
finder.find_links.append(value)
def break_args_options(line):
"""Break up the line into an args and options string. We only want to shlex
(and then optparse) the options, not the args. args can contain markers
which are corrupted by shlex.
"""
tokens = line.split(' ')
args = []
options = tokens[:]
for token in tokens:
if token.startswith('-') or token.startswith('--'):
break
else:
args.append(token)
options.pop(0)
return ' '.join(args), ' '.join(options)
def build_parser():
"""
Return a parser for parsing requirement lines
"""
parser = optparse.OptionParser(add_help_option=False)
option_factories = SUPPORTED_OPTIONS + SUPPORTED_OPTIONS_REQ
for option_factory in option_factories:
option = option_factory()
parser.add_option(option)
# By default optparse sys.exits on parsing errors. We want to wrap
# that in our own exception.
def parser_exit(self, msg):
raise RequirementsFileParseError(msg)
parser.exit = parser_exit
return parser
def join_lines(iterator):
"""
Joins a line ending in '\' with the previous line.
"""
lines = []
for line in iterator:
if not line.endswith('\\'):
if lines:
lines.append(line)
yield ''.join(lines)
lines = []
else:
yield line
else:
lines.append(line.strip('\\'))
# TODO: handle space after '\'.
# TODO: handle '\' on last line.
def ignore_comments(iterator):
"""
Strips and filters empty or commented lines.
"""
for line in iterator:
line = COMMENT_RE.sub('', line)
line = line.strip()
if line:
yield line
def skip_regex(lines, options):
"""
Optionally exclude lines that match '--skip-requirements-regex'
"""
skip_regex = options.skip_requirements_regex if options else None
if skip_regex:
lines = filterfalse(re.compile(skip_regex).search, lines)
return lines

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lib/python3.5/site-packages/pip/req/req_set.py Normal file
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from __future__ import absolute_import
from collections import defaultdict
import functools
import itertools
import logging
import os
from pip._vendor import pkg_resources
from pip._vendor import requests
from pip.download import (url_to_path, unpack_url)
from pip.exceptions import (InstallationError, BestVersionAlreadyInstalled,
DistributionNotFound, PreviousBuildDirError)
from pip.req.req_install import InstallRequirement
from pip.utils import (
display_path, dist_in_usersite, ensure_dir, normalize_path)
from pip.utils.logging import indent_log
from pip.vcs import vcs
logger = logging.getLogger(__name__)
class Requirements(object):
def __init__(self):
self._keys = []
self._dict = {}
def keys(self):
return self._keys
def values(self):
return [self._dict[key] for key in self._keys]
def __contains__(self, item):
return item in self._keys
def __setitem__(self, key, value):
if key not in self._keys:
self._keys.append(key)
self._dict[key] = value
def __getitem__(self, key):
return self._dict[key]
def __repr__(self):
values = ['%s: %s' % (repr(k), repr(self[k])) for k in self.keys()]
return 'Requirements({%s})' % ', '.join(values)
class DistAbstraction(object):
"""Abstracts out the wheel vs non-wheel prepare_files logic.
The requirements for anything installable are as follows:
- we must be able to determine the requirement name
(or we can't correctly handle the non-upgrade case).
- we must be able to generate a list of run-time dependencies
without installing any additional packages (or we would
have to either burn time by doing temporary isolated installs
or alternatively violate pips 'don't start installing unless
all requirements are available' rule - neither of which are
desirable).
- for packages with setup requirements, we must also be able
to determine their requirements without installing additional
packages (for the same reason as run-time dependencies)
- we must be able to create a Distribution object exposing the
above metadata.
"""
def __init__(self, req_to_install):
self.req_to_install = req_to_install
def dist(self, finder):
"""Return a setuptools Dist object."""
raise NotImplementedError(self.dist)
def prep_for_dist(self):
"""Ensure that we can get a Dist for this requirement."""
raise NotImplementedError(self.dist)
def make_abstract_dist(req_to_install):
"""Factory to make an abstract dist object.
Preconditions: Either an editable req with a source_dir, or satisfied_by or
a wheel link, or a non-editable req with a source_dir.
:return: A concrete DistAbstraction.
"""
if req_to_install.editable:
return IsSDist(req_to_install)
elif req_to_install.link and req_to_install.link.is_wheel:
return IsWheel(req_to_install)
else:
return IsSDist(req_to_install)
class IsWheel(DistAbstraction):
def dist(self, finder):
return list(pkg_resources.find_distributions(
self.req_to_install.source_dir))[0]
def prep_for_dist(self):
# FIXME:https://github.com/pypa/pip/issues/1112
pass
class IsSDist(DistAbstraction):
def dist(self, finder):
dist = self.req_to_install.get_dist()
# FIXME: shouldn't be globally added:
if dist.has_metadata('dependency_links.txt'):
finder.add_dependency_links(
dist.get_metadata_lines('dependency_links.txt')
)
return dist
def prep_for_dist(self):
self.req_to_install.run_egg_info()
self.req_to_install.assert_source_matches_version()
class Installed(DistAbstraction):
def dist(self, finder):
return self.req_to_install.satisfied_by
def prep_for_dist(self):
pass
class RequirementSet(object):
def __init__(self, build_dir, src_dir, download_dir, upgrade=False,
ignore_installed=False, as_egg=False, target_dir=None,
ignore_dependencies=False, force_reinstall=False,
use_user_site=False, session=None, pycompile=True,
isolated=False, wheel_download_dir=None,
wheel_cache=None):
"""Create a RequirementSet.
:param wheel_download_dir: Where still-packed .whl files should be
written to. If None they are written to the download_dir parameter.
Separate to download_dir to permit only keeping wheel archives for
pip wheel.
:param download_dir: Where still packed archives should be written to.
If None they are not saved, and are deleted immediately after
unpacking.
:param wheel_cache: The pip wheel cache, for passing to
InstallRequirement.
"""
if session is None:
raise TypeError(
"RequirementSet() missing 1 required keyword argument: "
"'session'"
)
self.build_dir = build_dir
self.src_dir = src_dir
# XXX: download_dir and wheel_download_dir overlap semantically and may
# be combined if we're willing to have non-wheel archives present in
# the wheelhouse output by 'pip wheel'.
self.download_dir = download_dir
self.upgrade = upgrade
self.ignore_installed = ignore_installed
self.force_reinstall = force_reinstall
self.requirements = Requirements()
# Mapping of alias: real_name
self.requirement_aliases = {}
self.unnamed_requirements = []
self.ignore_dependencies = ignore_dependencies
self.successfully_downloaded = []
self.successfully_installed = []
self.reqs_to_cleanup = []
self.as_egg = as_egg
self.use_user_site = use_user_site
self.target_dir = target_dir # set from --target option
self.session = session
self.pycompile = pycompile
self.isolated = isolated
if wheel_download_dir:
wheel_download_dir = normalize_path(wheel_download_dir)
self.wheel_download_dir = wheel_download_dir
self._wheel_cache = wheel_cache
# Maps from install_req -> dependencies_of_install_req
self._dependencies = defaultdict(list)
def __str__(self):
reqs = [req for req in self.requirements.values()
if not req.comes_from]
reqs.sort(key=lambda req: req.name.lower())
return ' '.join([str(req.req) for req in reqs])
def __repr__(self):
reqs = [req for req in self.requirements.values()]
reqs.sort(key=lambda req: req.name.lower())
reqs_str = ', '.join([str(req.req) for req in reqs])
return ('<%s object; %d requirement(s): %s>'
% (self.__class__.__name__, len(reqs), reqs_str))
def add_requirement(self, install_req, parent_req_name=None):
"""Add install_req as a requirement to install.
:param parent_req_name: The name of the requirement that needed this
added. The name is used because when multiple unnamed requirements
resolve to the same name, we could otherwise end up with dependency
links that point outside the Requirements set. parent_req must
already be added. Note that None implies that this is a user
supplied requirement, vs an inferred one.
:return: Additional requirements to scan. That is either [] if
the requirement is not applicable, or [install_req] if the
requirement is applicable and has just been added.
"""
name = install_req.name
if not install_req.match_markers():
logger.warning("Ignoring %s: markers %r don't match your "
"environment", install_req.name,
install_req.markers)
return []
install_req.as_egg = self.as_egg
install_req.use_user_site = self.use_user_site
install_req.target_dir = self.target_dir
install_req.pycompile = self.pycompile
if not name:
# url or path requirement w/o an egg fragment
self.unnamed_requirements.append(install_req)
return [install_req]
else:
try:
existing_req = self.get_requirement(name)
except KeyError:
existing_req = None
if (parent_req_name is None and existing_req and not
existing_req.constraint):
raise InstallationError(
'Double requirement given: %s (already in %s, name=%r)'
% (install_req, existing_req, name))
if not existing_req:
# Add requirement
self.requirements[name] = install_req
# FIXME: what about other normalizations? E.g., _ vs. -?
if name.lower() != name:
self.requirement_aliases[name.lower()] = name
result = [install_req]
else:
if not existing_req.constraint:
# No need to scan, we've already encountered this for
# scanning.
result = []
elif not install_req.constraint:
# If we're now installing a constraint, mark the existing
# object for real installation.
existing_req.constraint = False
# And now we need to scan this.
result = [existing_req]
# Canonicalise to the already-added object for the backref
# check below.
install_req = existing_req
if parent_req_name:
parent_req = self.get_requirement(parent_req_name)
self._dependencies[parent_req].append(install_req)
return result
def has_requirement(self, project_name):
for name in project_name, project_name.lower():
if name in self.requirements or name in self.requirement_aliases:
return True
return False
@property
def has_requirements(self):
return list(req for req in self.requirements.values() if not
req.constraint) or self.unnamed_requirements
@property
def is_download(self):
if self.download_dir:
self.download_dir = os.path.expanduser(self.download_dir)
if os.path.exists(self.download_dir):
return True
else:
logger.critical('Could not find download directory')
raise InstallationError(
"Could not find or access download directory '%s'"
% display_path(self.download_dir))
return False
def get_requirement(self, project_name):
for name in project_name, project_name.lower():
if name in self.requirements:
return self.requirements[name]
if name in self.requirement_aliases:
return self.requirements[self.requirement_aliases[name]]
raise KeyError("No project with the name %r" % project_name)
def uninstall(self, auto_confirm=False):
for req in self.requirements.values():
if req.constraint:
continue
req.uninstall(auto_confirm=auto_confirm)
req.commit_uninstall()
def _walk_req_to_install(self, handler):
"""Call handler for all pending reqs.
:param handler: Handle a single requirement. Should take a requirement
to install. Can optionally return an iterable of additional
InstallRequirements to cover.
"""
# The list() here is to avoid potential mutate-while-iterating bugs.
discovered_reqs = []
reqs = itertools.chain(
list(self.unnamed_requirements), list(self.requirements.values()),
discovered_reqs)
for req_to_install in reqs:
more_reqs = handler(req_to_install)
if more_reqs:
discovered_reqs.extend(more_reqs)
def prepare_files(self, finder):
"""
Prepare process. Create temp directories, download and/or unpack files.
"""
# make the wheelhouse
if self.wheel_download_dir:
ensure_dir(self.wheel_download_dir)
self._walk_req_to_install(
functools.partial(self._prepare_file, finder))
def _check_skip_installed(self, req_to_install, finder):
"""Check if req_to_install should be skipped.
This will check if the req is installed, and whether we should upgrade
or reinstall it, taking into account all the relevant user options.
After calling this req_to_install will only have satisfied_by set to
None if the req_to_install is to be upgraded/reinstalled etc. Any
other value will be a dist recording the current thing installed that
satisfies the requirement.
Note that for vcs urls and the like we can't assess skipping in this
routine - we simply identify that we need to pull the thing down,
then later on it is pulled down and introspected to assess upgrade/
reinstalls etc.
:return: A text reason for why it was skipped, or None.
"""
# Check whether to upgrade/reinstall this req or not.
req_to_install.check_if_exists()
if req_to_install.satisfied_by:
skip_reason = 'satisfied (use --upgrade to upgrade)'
if self.upgrade:
best_installed = False
# For link based requirements we have to pull the
# tree down and inspect to assess the version #, so
# its handled way down.
if not (self.force_reinstall or req_to_install.link):
try:
finder.find_requirement(req_to_install, self.upgrade)
except BestVersionAlreadyInstalled:
skip_reason = 'up-to-date'
best_installed = True
except DistributionNotFound:
# No distribution found, so we squash the
# error - it will be raised later when we
# re-try later to do the install.
# Why don't we just raise here?
pass
if not best_installed:
# don't uninstall conflict if user install and
# conflict is not user install
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
return skip_reason
else:
return None
def _prepare_file(self, finder, req_to_install):
"""Prepare a single requirements files.
:return: A list of addition InstallRequirements to also install.
"""
# Tell user what we are doing for this requirement:
# obtain (editable), skipping, processing (local url), collecting
# (remote url or package name)
if req_to_install.constraint or req_to_install.prepared:
return []
req_to_install.prepared = True
if req_to_install.editable:
logger.info('Obtaining %s', req_to_install)
else:
# satisfied_by is only evaluated by calling _check_skip_installed,
# so it must be None here.
assert req_to_install.satisfied_by is None
if not self.ignore_installed:
skip_reason = self._check_skip_installed(
req_to_install, finder)
if req_to_install.satisfied_by:
assert skip_reason is not None, (
'_check_skip_installed returned None but '
'req_to_install.satisfied_by is set to %r'
% (req_to_install.satisfied_by,))
logger.info(
'Requirement already %s: %s', skip_reason,
req_to_install)
else:
if (req_to_install.link and
req_to_install.link.scheme == 'file'):
path = url_to_path(req_to_install.link.url)
logger.info('Processing %s', display_path(path))
else:
logger.info('Collecting %s', req_to_install)
with indent_log():
# ################################ #
# # vcs update or unpack archive # #
# ################################ #
if req_to_install.editable:
req_to_install.ensure_has_source_dir(self.src_dir)
req_to_install.update_editable(not self.is_download)
abstract_dist = make_abstract_dist(req_to_install)
abstract_dist.prep_for_dist()
if self.is_download:
req_to_install.archive(self.download_dir)
elif req_to_install.satisfied_by:
abstract_dist = Installed(req_to_install)
else:
# @@ if filesystem packages are not marked
# editable in a req, a non deterministic error
# occurs when the script attempts to unpack the
# build directory
req_to_install.ensure_has_source_dir(self.build_dir)
# If a checkout exists, it's unwise to keep going. version
# inconsistencies are logged later, but do not fail the
# installation.
# FIXME: this won't upgrade when there's an existing
# package unpacked in `req_to_install.source_dir`
if os.path.exists(
os.path.join(req_to_install.source_dir, 'setup.py')):
raise PreviousBuildDirError(
"pip can't proceed with requirements '%s' due to a"
" pre-existing build directory (%s). This is "
"likely due to a previous installation that failed"
". pip is being responsible and not assuming it "
"can delete this. Please delete it and try again."
% (req_to_install, req_to_install.source_dir)
)
req_to_install.populate_link(finder, self.upgrade)
# We can't hit this spot and have populate_link return None.
# req_to_install.satisfied_by is None here (because we're
# guarded) and upgrade has no impact except when satisfied_by
# is not None.
# Then inside find_requirement existing_applicable -> False
# If no new versions are found, DistributionNotFound is raised,
# otherwise a result is guaranteed.
assert req_to_install.link
try:
download_dir = self.download_dir
# We always delete unpacked sdists after pip ran.
autodelete_unpacked = True
if req_to_install.link.is_wheel \
and self.wheel_download_dir:
# when doing 'pip wheel` we download wheels to a
# dedicated dir.
download_dir = self.wheel_download_dir
if req_to_install.link.is_wheel:
if download_dir:
# When downloading, we only unpack wheels to get
# metadata.
autodelete_unpacked = True
else:
# When installing a wheel, we use the unpacked
# wheel.
autodelete_unpacked = False
unpack_url(
req_to_install.link, req_to_install.source_dir,
download_dir, autodelete_unpacked,
session=self.session)
except requests.HTTPError as exc:
logger.critical(
'Could not install requirement %s because '
'of error %s',
req_to_install,
exc,
)
raise InstallationError(
'Could not install requirement %s because '
'of HTTP error %s for URL %s' %
(req_to_install, exc, req_to_install.link)
)
abstract_dist = make_abstract_dist(req_to_install)
abstract_dist.prep_for_dist()
if self.is_download:
# Make a .zip of the source_dir we already created.
if req_to_install.link.scheme in vcs.all_schemes:
req_to_install.archive(self.download_dir)
# req_to_install.req is only avail after unpack for URL
# pkgs repeat check_if_exists to uninstall-on-upgrade
# (#14)
if not self.ignore_installed:
req_to_install.check_if_exists()
if req_to_install.satisfied_by:
if self.upgrade or self.ignore_installed:
# don't uninstall conflict if user install and
# conflict is not user install
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,
wheel_cache=self._wheel_cache,
)
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
if req.constraint:
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()
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:
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

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lib/python3.5/site-packages/pip/req/req_uninstall.py Normal file
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from __future__ import absolute_import
import logging
import os
import sys
import tempfile
from pip.compat import uses_pycache, WINDOWS, cache_from_source
from pip.exceptions import UninstallationError
from pip.utils import (rmtree, ask, is_local, dist_is_local, renames,
normalize_path)
from pip.utils.logging import indent_log
logger = logging.getLogger(__name__)
class UninstallPathSet(object):
"""A set of file paths to be removed in the uninstallation of a
requirement."""
def __init__(self, dist):
self.paths = set()
self._refuse = set()
self.pth = {}
self.dist = dist
self.save_dir = None
self._moved_paths = []
def _permitted(self, path):
"""
Return True if the given path is one we are permitted to
remove/modify, False otherwise.
"""
return is_local(path)
def _can_uninstall(self):
if not dist_is_local(self.dist):
logger.info(
"Not uninstalling %s at %s, outside environment %s",
self.dist.project_name,
normalize_path(self.dist.location),
sys.prefix,
)
return False
return True
def add(self, path):
path = normalize_path(path, resolve_symlinks=False)
if not os.path.exists(path):
return
if self._permitted(path):
self.paths.add(path)
else:
self._refuse.add(path)
# __pycache__ files can show up after 'installed-files.txt' is created,
# due to imports
if os.path.splitext(path)[1] == '.py' and uses_pycache:
self.add(cache_from_source(path))
def add_pth(self, pth_file, entry):
pth_file = normalize_path(pth_file)
if self._permitted(pth_file):
if pth_file not in self.pth:
self.pth[pth_file] = UninstallPthEntries(pth_file)
self.pth[pth_file].add(entry)
else:
self._refuse.add(pth_file)
def compact(self, paths):
"""Compact a path set to contain the minimal number of paths
necessary to contain all paths in the set. If /a/path/ and
/a/path/to/a/file.txt are both in the set, leave only the
shorter path."""
short_paths = set()
for path in sorted(paths, key=len):
if not any([
(path.startswith(shortpath) and
path[len(shortpath.rstrip(os.path.sep))] == os.path.sep)
for shortpath in short_paths]):
short_paths.add(path)
return short_paths
def _stash(self, path):
return os.path.join(
self.save_dir, os.path.splitdrive(path)[1].lstrip(os.path.sep))
def remove(self, auto_confirm=False):
"""Remove paths in ``self.paths`` with confirmation (unless
``auto_confirm`` is True)."""
if not self._can_uninstall():
return
if not self.paths:
logger.info(
"Can't uninstall '%s'. No files were found to uninstall.",
self.dist.project_name,
)
return
logger.info(
'Uninstalling %s-%s:',
self.dist.project_name, self.dist.version
)
with indent_log():
paths = sorted(self.compact(self.paths))
if auto_confirm:
response = 'y'
else:
for path in paths:
logger.info(path)
response = ask('Proceed (y/n)? ', ('y', 'n'))
if self._refuse:
logger.info('Not removing or modifying (outside of prefix):')
for path in self.compact(self._refuse):
logger.info(path)
if response == 'y':
self.save_dir = tempfile.mkdtemp(suffix='-uninstall',
prefix='pip-')
for path in paths:
new_path = self._stash(path)
logger.debug('Removing file or directory %s', path)
self._moved_paths.append(path)
renames(path, new_path)
for pth in self.pth.values():
pth.remove()
logger.info(
'Successfully uninstalled %s-%s',
self.dist.project_name, self.dist.version
)
def rollback(self):
"""Rollback the changes previously made by remove()."""
if self.save_dir is None:
logger.error(
"Can't roll back %s; was not uninstalled",
self.dist.project_name,
)
return False
logger.info('Rolling back uninstall of %s', self.dist.project_name)
for path in self._moved_paths:
tmp_path = self._stash(path)
logger.debug('Replacing %s', path)
renames(tmp_path, path)
for pth in self.pth.values():
pth.rollback()
def commit(self):
"""Remove temporary save dir: rollback will no longer be possible."""
if self.save_dir is not None:
rmtree(self.save_dir)
self.save_dir = None
self._moved_paths = []
class UninstallPthEntries(object):
def __init__(self, pth_file):
if not os.path.isfile(pth_file):
raise UninstallationError(
"Cannot remove entries from nonexistent file %s" % pth_file
)
self.file = pth_file
self.entries = set()
self._saved_lines = None
def add(self, entry):
entry = os.path.normcase(entry)
# On Windows, os.path.normcase converts the entry to use
# backslashes. This is correct for entries that describe absolute
# paths outside of site-packages, but all the others use forward
# slashes.
if WINDOWS and not os.path.splitdrive(entry)[0]:
entry = entry.replace('\\', '/')
self.entries.add(entry)
def remove(self):
logger.debug('Removing pth entries from %s:', self.file)
with open(self.file, 'rb') as fh:
# windows uses '\r\n' with py3k, but uses '\n' with py2.x
lines = fh.readlines()
self._saved_lines = lines
if any(b'\r\n' in line for line in lines):
endline = '\r\n'
else:
endline = '\n'
for entry in self.entries:
try:
logger.debug('Removing entry: %s', entry)
lines.remove((entry + endline).encode("utf-8"))
except ValueError:
pass
with open(self.file, 'wb') as fh:
fh.writelines(lines)
def rollback(self):
if self._saved_lines is None:
logger.error(
'Cannot roll back changes to %s, none were made', self.file
)
return False
logger.debug('Rolling %s back to previous state', self.file)
with open(self.file, 'wb') as fh:
fh.writelines(self._saved_lines)
return True