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easy_install.py
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easy_install.py
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#############################################################################
#
# Copyright (c) 2005 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Python easy_install API
This module provides a high-level Python API for installing packages.
It doesn't install scripts. It uses setuptools and requires it to be
installed.
"""
import copy
import distutils.errors
import errno
import glob
import logging
import os
import pkg_resources
from pkg_resources import packaging
import py_compile
import re
import setuptools.archive_util
import setuptools.command.easy_install
import setuptools.command.setopt
import setuptools.package_index
import shutil
import subprocess
import sys
import tempfile
import zc.buildout
import zc.buildout.rmtree
from zc.buildout import WINDOWS
from zc.buildout import PY3
import warnings
import csv
try:
from setuptools.wheel import Wheel # This is the important import
from setuptools import __version__ as setuptools_version
# Now we need to check if we have at least 38.2.3 for namespace support.
SETUPTOOLS_SUPPORTS_WHEELS = (
pkg_resources.parse_version(setuptools_version) >=
pkg_resources.parse_version('38.2.3'))
except ImportError:
SETUPTOOLS_SUPPORTS_WHEELS = False
BIN_SCRIPTS = 'Scripts' if WINDOWS else 'bin'
warnings.filterwarnings(
'ignore', '.+is being parsed as a legacy, non PEP 440, version')
_oprp = getattr(os.path, 'realpath', lambda path: path)
def realpath(path):
return os.path.normcase(os.path.abspath(_oprp(path)))
default_index_url = os.environ.get(
'buildout_testing_index_url',
'https://pypi.org/simple',
)
logger = logging.getLogger('zc.buildout.easy_install')
url_match = re.compile('[a-z0-9+.-]+://').match
is_source_encoding_line = re.compile(r'coding[:=]\s*([-\w.]+)').search
# Source encoding regex from http://www.python.org/dev/peps/pep-0263/
is_win32 = sys.platform == 'win32'
is_jython = sys.platform.startswith('java')
if is_jython:
import java.lang.System
jython_os_name = (java.lang.System.getProperties()['os.name']).lower()
# Make sure we're not being run with an older bootstrap.py that gives us
# setuptools instead of setuptools
has_distribute = pkg_resources.working_set.find(
pkg_resources.Requirement.parse('distribute')) is not None
has_setuptools = pkg_resources.working_set.find(
pkg_resources.Requirement.parse('setuptools')) is not None
if has_distribute and not has_setuptools:
sys.exit("zc.buildout 3 needs setuptools, not distribute."
"Did you properly install with pip in a virtualenv ?")
# Include buildout and setuptools eggs in paths. We get this
# initially from the entire working set. Later, we'll use the install
# function to narrow to just the buildout and setuptools paths.
buildout_and_setuptools_path = sorted({d.location for d in pkg_resources.working_set})
setuptools_path = buildout_and_setuptools_path
pip_path = buildout_and_setuptools_path
logger.debug('before restricting versions: pip_path %r', pip_path)
FILE_SCHEME = re.compile('file://', re.I).match
DUNDER_FILE_PATTERN = re.compile(r"__file__ = '(?P<filename>.+)'$")
class _Monkey(object):
def __init__(self, module, **kw):
mdict = self._mdict = module.__dict__
self._before = mdict.copy()
self._overrides = kw
def __enter__(self):
self._mdict.update(self._overrides)
return self
def __exit__(self, exc_type, exc_value, traceback):
self._mdict.clear()
self._mdict.update(self._before)
class _NoWarn(object):
def warn(self, *args, **kw):
pass
_no_warn = _NoWarn()
class AllowHostsPackageIndex(setuptools.package_index.PackageIndex):
"""Will allow urls that are local to the system.
No matter what is allow_hosts.
"""
def url_ok(self, url, fatal=False):
if FILE_SCHEME(url):
return True
# distutils has its own logging, which can't be hooked / suppressed,
# so we monkey-patch the 'log' submodule to suppress the stupid
# "Link to <URL> ***BLOCKED*** by --allow-hosts" message.
with _Monkey(setuptools.package_index, log=_no_warn):
return setuptools.package_index.PackageIndex.url_ok(
self, url, False)
_indexes = {}
def _get_index(index_url, find_links, allow_hosts=('*',)):
key = index_url, tuple(find_links)
index = _indexes.get(key)
if index is not None:
return index
if index_url is None:
index_url = default_index_url
if index_url.startswith('file://'):
index_url = index_url[7:]
index = AllowHostsPackageIndex(index_url, hosts=allow_hosts)
if find_links:
index.add_find_links(find_links)
_indexes[key] = index
return index
clear_index_cache = _indexes.clear
if is_win32:
# work around spawn lamosity on windows
# XXX need safe quoting (see the subproces.list2cmdline) and test
def _safe_arg(arg):
return '"%s"' % arg
else:
_safe_arg = str
def call_subprocess(args, **kw):
if subprocess.call(args, **kw) != 0:
raise Exception(
"Failed to run command:\n%s"
% repr(args)[1:-1])
def _execute_permission():
current_umask = os.umask(0o022)
# os.umask only returns the current umask if you also give it one, so we
# have to give it a dummy one and immediately set it back to the real
# value... Distribute does the same.
os.umask(current_umask)
return 0o777 - current_umask
def get_namespace_package_paths(dist):
"""
Generator of the expected pathname of each __init__.py file of the
namespaces of a distribution.
"""
base = [dist.location]
init = ['__init__.py']
for namespace in dist.get_metadata_lines('namespace_packages.txt'):
yield os.path.join(*(base + namespace.split('.') + init))
def namespace_packages_need_pkg_resources(dist):
if os.path.isfile(dist.location):
# Zipped egg, with namespaces, surely needs setuptools
return True
# If they have `__init__.py` files that use pkg_resources and don't
# fallback to using `pkgutil`, then they need setuptools/pkg_resources:
for path in get_namespace_package_paths(dist):
if os.path.isfile(path):
with open(path, 'rb') as f:
source = f.read()
if (source and
b'pkg_resources' in source and
not b'pkgutil' in source):
return True
return False
def dist_needs_pkg_resources(dist):
"""
A distribution needs setuptools/pkg_resources added as requirement if:
* It has namespace packages declared with:
- `pkg_resources.declare_namespace()`
* Those namespace packages don't fall back to `pkgutil`
* It doesn't have `setuptools/pkg_resources` as requirement already
"""
return (
dist.has_metadata('namespace_packages.txt') and
# This will need to change when `pkg_resources` gets its own
# project:
'setuptools' not in {r.project_name for r in dist.requires()} and
namespace_packages_need_pkg_resources(dist)
)
class Installer(object):
_versions = {}
_required_by = {}
_picked_versions = {}
_download_cache = None
_install_from_cache = False
_prefer_final = True
_use_dependency_links = True
_allow_picked_versions = True
_store_required_by = False
_allow_unknown_extras = False
def __init__(self,
dest=None,
links=(),
index=None,
executable=sys.executable,
always_unzip=None, # Backward compat :/
path=None,
newest=True,
versions=None,
use_dependency_links=None,
allow_hosts=('*',),
check_picked=True,
allow_unknown_extras=False,
):
assert executable == sys.executable, (executable, sys.executable)
self._dest = dest if dest is None else pkg_resources.normalize_path(dest)
self._allow_hosts = allow_hosts
self._allow_unknown_extras = allow_unknown_extras
if self._install_from_cache:
if not self._download_cache:
raise ValueError("install_from_cache set to true with no"
" download cache")
links = ()
index = 'file://' + self._download_cache
if use_dependency_links is not None:
self._use_dependency_links = use_dependency_links
self._links = links = list(self._fix_file_links(links))
if self._download_cache and (self._download_cache not in links):
links.insert(0, self._download_cache)
self._index_url = index
path = (path and path[:] or []) + buildout_and_setuptools_path
self._path = path
if self._dest is None:
newest = False
self._newest = newest
self._env = self._make_env()
self._index = _get_index(index, links, self._allow_hosts)
self._requirements_and_constraints = []
self._check_picked = check_picked
if versions is not None:
self._versions = normalize_versions(versions)
def _make_env(self):
full_path = self._get_dest_dist_paths() + self._path
env = pkg_resources.Environment(full_path)
# this needs to be called whenever self._env is modified (or we could
# make an Environment subclass):
self._eggify_env_dest_dists(env, self._dest)
return env
def _env_rescan_dest(self):
self._env.scan(self._get_dest_dist_paths())
self._eggify_env_dest_dists(self._env, self._dest)
def _get_dest_dist_paths(self):
dest = self._dest
if dest is None:
return []
eggs = glob.glob(os.path.join(dest, '*.egg'))
dists = [os.path.dirname(dist_info) for dist_info in
glob.glob(os.path.join(dest, '*', '*.dist-info'))]
return list(set(eggs + dists))
@staticmethod
def _eggify_env_dest_dists(env, dest):
"""
Make sure everything found under `dest` is seen as an egg, even if it's
some other kind of dist.
"""
for project_name in env:
for dist in env[project_name]:
if os.path.dirname(dist.location) == dest:
dist.precedence = pkg_resources.EGG_DIST
def _version_conflict_information(self, name):
"""Return textual requirements/constraint information for debug purposes
We do a very simple textual search, as that filters out most
extraneous information without missing anything.
"""
output = [
"Version and requirements information containing %s:" % name]
version_constraint = self._versions.get(name)
if version_constraint:
output.append(
"[versions] constraint on %s: %s" % (name, version_constraint))
output += [line for line in self._requirements_and_constraints
if name.lower() in line.lower()]
return '\n '.join(output)
def _satisfied(self, req, source=None):
dists = [dist for dist in self._env[req.project_name] if dist in req]
if not dists:
logger.debug('We have no distributions for %s that satisfies %r.',
req.project_name, str(req))
return None, self._obtain(req, source)
# Note that dists are sorted from best to worst, as promised by
# env.__getitem__
for dist in dists:
if (dist.precedence == pkg_resources.DEVELOP_DIST):
logger.debug('We have a develop egg: %s', dist)
return dist, None
# Special common case, we have a specification for a single version:
specs = req.specs
if len(specs) == 1 and specs[0][0] == '==':
logger.debug('We have the distribution that satisfies %r.',
str(req))
return dists[0], None
if self._prefer_final:
fdists = [dist for dist in dists
if self._final_version(dist.parsed_version)
]
if fdists:
# There are final dists, so only use those
dists = fdists
if not self._newest:
# We don't need the newest, so we'll use the newest one we
# find, which is the first returned by
# Environment.__getitem__.
return dists[0], None
best_we_have = dists[0] # Because dists are sorted from best to worst
# We have some installed distros. There might, theoretically, be
# newer ones. Let's find out which ones are available and see if
# any are newer. We only do this if we're willing to install
# something, which is only true if dest is not None:
best_available = self._obtain(req, source)
if best_available is None:
# That's a bit odd. There aren't any distros available.
# We should use the best one we have that meets the requirement.
logger.debug(
'There are no distros available that meet %r.\n'
'Using our best, %s.',
str(req), best_we_have)
return best_we_have, None
if self._prefer_final:
if self._final_version(best_available.parsed_version):
if self._final_version(best_we_have.parsed_version):
if (best_we_have.parsed_version
<
best_available.parsed_version
):
return None, best_available
else:
return None, best_available
else:
if (not self._final_version(best_we_have.parsed_version)
and
(best_we_have.parsed_version
<
best_available.parsed_version
)
):
return None, best_available
else:
if (best_we_have.parsed_version
<
best_available.parsed_version
):
return None, best_available
logger.debug(
'We have the best distribution that satisfies %r.',
str(req))
return best_we_have, None
def _call_pip_install(self, spec, dest, dist):
tmp = tempfile.mkdtemp(dir=dest)
try:
paths = call_pip_install(spec, tmp)
dists = []
env = pkg_resources.Environment(paths)
for project in env:
dists.extend(env[project])
if not dists:
raise zc.buildout.UserError("Couldn't install: %s" % dist)
if len(dists) > 1:
logger.warn("Installing %s\n"
"caused multiple distributions to be installed:\n"
"%s\n",
dist, '\n'.join(map(str, dists)))
else:
d = dists[0]
if d.project_name != dist.project_name:
logger.warn("Installing %s\n"
"Caused installation of a distribution:\n"
"%s\n"
"with a different project name.",
dist, d)
if d.version != dist.version:
logger.warn("Installing %s\n"
"Caused installation of a distribution:\n"
"%s\n"
"with a different version.",
dist, d)
result = []
for d in dists:
result.append(_move_to_eggs_dir_and_compile(d, dest))
return result
finally:
zc.buildout.rmtree.rmtree(tmp)
def _obtain(self, requirement, source=None):
# initialize out index for this project:
index = self._index
if index.obtain(requirement) is None:
# Nothing is available.
return None
# Filter the available dists for the requirement and source flag
dists = [dist for dist in index[requirement.project_name]
if ((dist in requirement)
and
((not source) or
(dist.precedence == pkg_resources.SOURCE_DIST)
)
)
]
# If we prefer final dists, filter for final and use the
# result if it is non empty.
if self._prefer_final:
fdists = [dist for dist in dists
if self._final_version(dist.parsed_version)
]
if fdists:
# There are final dists, so only use those
dists = fdists
# Now find the best one:
best = []
bestv = None
for dist in dists:
distv = dist.parsed_version
if bestv is None or distv > bestv:
best = [dist]
bestv = distv
elif distv == bestv:
best.append(dist)
if not best:
return None
if len(best) == 1:
return best[0]
if self._download_cache:
for dist in best:
if (realpath(os.path.dirname(dist.location))
==
self._download_cache
):
return dist
best.sort()
return best[-1]
def _fetch(self, dist, tmp, download_cache):
if (download_cache
and (realpath(os.path.dirname(dist.location)) == download_cache)
):
logger.debug("Download cache has %s at: %s", dist, dist.location)
return dist
logger.debug("Fetching %s from: %s", dist, dist.location)
new_location = self._index.download(dist.location, tmp)
if (download_cache
and (realpath(new_location) == realpath(dist.location))
and os.path.isfile(new_location)
):
# setuptools avoids making extra copies, but we want to copy
# to the download cache
shutil.copy2(new_location, tmp)
new_location = os.path.join(tmp, os.path.basename(new_location))
return dist.clone(location=new_location)
def _get_dist(self, requirement, ws):
__doing__ = 'Getting distribution for %r.', str(requirement)
# Maybe an existing dist is already the best dist that satisfies the
# requirement
dist, avail = self._satisfied(requirement)
if dist is None:
if self._dest is None:
raise zc.buildout.UserError(
"We don't have a distribution for %s\n"
"and can't install one in offline (no-install) mode.\n"
% requirement)
logger.info(*__doing__)
# Retrieve the dist:
if avail is None:
self._index.obtain(requirement)
raise MissingDistribution(requirement, ws)
# We may overwrite distributions, so clear importer
# cache.
sys.path_importer_cache.clear()
tmp = self._download_cache
if tmp is None:
tmp = tempfile.mkdtemp('get_dist')
try:
dist = self._fetch(avail, tmp, self._download_cache)
if dist is None:
raise zc.buildout.UserError(
"Couldn't download distribution %s." % avail)
dists = [_move_to_eggs_dir_and_compile(dist, self._dest)]
for _d in dists:
if _d not in ws:
ws.add(_d, replace=True)
finally:
if tmp != self._download_cache:
zc.buildout.rmtree.rmtree(tmp)
self._env_rescan_dest()
dist = self._env.best_match(requirement, ws)
logger.info("Got %s.", dist)
else:
dists = [dist]
if dist not in ws:
ws.add(dist)
if not self._install_from_cache and self._use_dependency_links:
self._add_dependency_links_from_dists(dists)
if self._check_picked:
self._check_picked_requirement_versions(requirement, dists)
return dists
def _add_dependency_links_from_dists(self, dists):
reindex = False
links = self._links
for dist in dists:
if dist.has_metadata('dependency_links.txt'):
for link in dist.get_metadata_lines('dependency_links.txt'):
link = link.strip()
if link not in links:
logger.debug('Adding find link %r from %s',
link, dist)
links.append(link)
reindex = True
if reindex:
self._index = _get_index(self._index_url, links, self._allow_hosts)
def _check_picked_requirement_versions(self, requirement, dists):
""" Check whether we picked a version and, if we did, report it """
for dist in dists:
if not (dist.precedence == pkg_resources.DEVELOP_DIST
or
(len(requirement.specs) == 1
and
requirement.specs[0][0] == '==')
):
logger.debug('Picked: %s = %s',
dist.project_name, dist.version)
self._picked_versions[dist.project_name] = dist.version
if not self._allow_picked_versions:
msg = NOT_PICKED_AND_NOT_ALLOWED.format(
name=dist.project_name,
version=dist.version
)
raise zc.buildout.UserError(msg)
def _maybe_add_setuptools(self, ws, dist):
if dist_needs_pkg_resources(dist):
# We have a namespace package but no requirement for setuptools
if dist.precedence == pkg_resources.DEVELOP_DIST:
logger.warning(
"Develop distribution: %s\n"
"uses namespace packages but the distribution "
"does not require setuptools.",
dist)
requirement = self._constrain(
pkg_resources.Requirement.parse('setuptools')
)
if ws.find(requirement) is None:
self._get_dist(requirement, ws)
def _constrain(self, requirement):
"""Return requirement with optional [versions] constraint added."""
constraint = self._versions.get(requirement.project_name.lower())
if constraint:
try:
requirement = _constrained_requirement(constraint,
requirement)
except IncompatibleConstraintError:
logger.info(self._version_conflict_information(
requirement.project_name.lower()))
raise
return requirement
def install(self, specs, working_set=None):
logger.debug('Installing %s.', repr(specs)[1:-1])
self._requirements_and_constraints.append(
"Base installation request: %s" % repr(specs)[1:-1])
for_buildout_run = bool(working_set)
requirements = [pkg_resources.Requirement.parse(spec)
for spec in specs]
requirements = [
self._constrain(requirement)
for requirement in requirements
if not requirement.marker or requirement.marker.evaluate()
]
if working_set is None:
ws = pkg_resources.WorkingSet([])
else:
ws = working_set
for requirement in requirements:
for dist in self._get_dist(requirement, ws):
self._maybe_add_setuptools(ws, dist)
# OK, we have the requested distributions and they're in the working
# set, but they may have unmet requirements. We'll resolve these
# requirements. This is code modified from
# pkg_resources.WorkingSet.resolve. We can't reuse that code directly
# because we have to constrain our requirements (see
# versions_section_ignored_for_dependency_in_favor_of_site_packages in
# zc.buildout.tests).
requirements.reverse() # Set up the stack.
processed = {} # This is a set of processed requirements.
best = {} # This is a mapping of package name -> dist.
# Note that we don't use the existing environment, because we want
# to look for new eggs unless what we have is the best that
# matches the requirement.
env = pkg_resources.Environment(ws.entries)
while requirements:
# Process dependencies breadth-first.
current_requirement = requirements.pop(0)
req = self._constrain(current_requirement)
if req in processed:
# Ignore cyclic or redundant dependencies.
continue
dist = best.get(req.key)
if dist is None:
try:
dist = env.best_match(req, ws)
except pkg_resources.VersionConflict as err:
logger.debug(
"Version conflict while processing requirement %s "
"(constrained to %s)",
current_requirement, req)
# Installing buildout itself and its extensions and
# recipes requires the global
# ``pkg_resources.working_set`` to be active, which also
# includes all system packages. So there might be
# conflicts, which are fine to ignore. We'll grab the
# correct version a few lines down.
if not for_buildout_run:
raise VersionConflict(err, ws)
if dist is None:
if self._dest:
logger.debug('Getting required %r', str(req))
else:
logger.debug('Adding required %r', str(req))
self._log_requirement(ws, req)
for dist in self._get_dist(req, ws):
self._maybe_add_setuptools(ws, dist)
if dist not in req:
# Oops, the "best" so far conflicts with a dependency.
logger.info(self._version_conflict_information(req.key))
raise VersionConflict(
pkg_resources.VersionConflict(dist, req), ws)
best[req.key] = dist
missing_requested = sorted(
set(req.extras) - set(dist.extras)
)
for missing in missing_requested:
logger.warning(
'%s does not provide the extra \'%s\'',
dist, missing
)
if missing_requested:
if not self._allow_unknown_extras:
raise zc.buildout.UserError(
"Couldn't find the required extra. "
"This means the requirement is incorrect. "
"If the requirement is itself from software you "
"requested, then there might be a bug in "
"requested software. You can ignore this by "
"using 'allow-unknown-extras=true', however "
"that may simply cause needed software to be omitted."
)
extra_requirements = sorted(
set(dist.extras) & set(req.extras)
)
else:
extra_requirements = dist.requires(req.extras)[::-1]
for extra_requirement in extra_requirements:
self._requirements_and_constraints.append(
"Requirement of %s: %s" % (
current_requirement, extra_requirement))
requirements.extend(extra_requirements)
processed[req] = True
return ws
def build(self, spec, build_ext):
requirement = self._constrain(pkg_resources.Requirement.parse(spec))
dist, avail = self._satisfied(requirement, 1)
if dist is not None:
return [dist.location]
# Retrieve the dist:
if avail is None:
raise zc.buildout.UserError(
"Couldn't find a source distribution for %r."
% str(requirement))
if self._dest is None:
raise zc.buildout.UserError(
"We don't have a distribution for %s\n"
"and can't build one in offline (no-install) mode.\n"
% requirement
)
logger.debug('Building %r', spec)
tmp = self._download_cache
if tmp is None:
tmp = tempfile.mkdtemp('get_dist')
try:
dist = self._fetch(avail, tmp, self._download_cache)
build_tmp = tempfile.mkdtemp('build')
try:
setuptools.archive_util.unpack_archive(dist.location,
build_tmp)
if os.path.exists(os.path.join(build_tmp, 'setup.py')):
base = build_tmp
else:
setups = glob.glob(
os.path.join(build_tmp, '*', 'setup.py'))
if not setups:
raise distutils.errors.DistutilsError(
"Couldn't find a setup script in %s"
% os.path.basename(dist.location)
)
if len(setups) > 1:
raise distutils.errors.DistutilsError(
"Multiple setup scripts in %s"
% os.path.basename(dist.location)
)
base = os.path.dirname(setups[0])
setup_cfg = os.path.join(base, 'setup.cfg')
if not os.path.exists(setup_cfg):
f = open(setup_cfg, 'w')
f.close()
setuptools.command.setopt.edit_config(
setup_cfg, dict(build_ext=build_ext))
dists = self._call_pip_install(base, self._dest, dist)
return [dist.location for dist in dists]
finally:
zc.buildout.rmtree.rmtree(build_tmp)
finally:
if tmp != self._download_cache:
zc.buildout.rmtree.rmtree(tmp)
def _fix_file_links(self, links):
for link in links:
if link.startswith('file://') and link[-1] != '/':
if os.path.isdir(link[7:]):
# work around excessive restriction in setuptools:
link += '/'
yield link
def _log_requirement(self, ws, req):
if (not logger.isEnabledFor(logging.DEBUG) and
not Installer._store_required_by):
# Sorting the working set and iterating over it's requirements
# is expensive, so short circuit the work if it won't even be
# logged. When profiling a simple buildout with 10 parts with
# identical and large working sets, this resulted in a
# decrease of run time from 93.411 to 15.068 seconds, about a
# 6 fold improvement.
return
ws = list(ws)
ws.sort()
for dist in ws:
if req in dist.requires():
logger.debug(" required by %s." % dist)
req_ = str(req)
if req_ not in Installer._required_by:
Installer._required_by[req_] = set()
Installer._required_by[req_].add(str(dist.as_requirement()))
def _final_version(self, parsed_version):
return not parsed_version.is_prerelease
def normalize_versions(versions):
"""Return version dict with keys normalized to lowercase.
PyPI is case-insensitive and not all distributions are consistent in
their own naming.
"""
return dict([(k.lower(), v) for (k, v) in versions.items()])
def default_versions(versions=None):
old = Installer._versions
if versions is not None:
Installer._versions = normalize_versions(versions)
return old
def download_cache(path=-1):
old = Installer._download_cache
if path != -1:
if path:
path = realpath(path)
Installer._download_cache = path
return old
def install_from_cache(setting=None):
old = Installer._install_from_cache
if setting is not None:
Installer._install_from_cache = bool(setting)
return old
def prefer_final(setting=None):
old = Installer._prefer_final
if setting is not None:
Installer._prefer_final = bool(setting)
return old
def use_dependency_links(setting=None):
old = Installer._use_dependency_links
if setting is not None:
Installer._use_dependency_links = bool(setting)
return old
def allow_picked_versions(setting=None):
old = Installer._allow_picked_versions
if setting is not None:
Installer._allow_picked_versions = bool(setting)
return old
def store_required_by(setting=None):
old = Installer._store_required_by
if setting is not None:
Installer._store_required_by = bool(setting)
return old
def get_picked_versions():
picked_versions = sorted(Installer._picked_versions.items())
required_by = Installer._required_by
return (picked_versions, required_by)
def install(specs, dest,
links=(), index=None,
executable=sys.executable,
always_unzip=None, # Backward compat :/
path=None, working_set=None, newest=True, versions=None,
use_dependency_links=None, allow_hosts=('*',),
include_site_packages=None,
allowed_eggs_from_site_packages=None,
check_picked=True,
allow_unknown_extras=False,
):
assert executable == sys.executable, (executable, sys.executable)
assert include_site_packages is None
assert allowed_eggs_from_site_packages is None
installer = Installer(dest, links, index, sys.executable,
always_unzip, path,
newest, versions, use_dependency_links,
allow_hosts=allow_hosts,
check_picked=check_picked,
allow_unknown_extras=allow_unknown_extras)
return installer.install(specs, working_set)
buildout_and_setuptools_dists = list(install(['zc.buildout'], None,
check_picked=False))
buildout_and_setuptools_path = sorted({d.location
for d in buildout_and_setuptools_dists})
pip_dists = [d for d in buildout_and_setuptools_dists if d.project_name != 'zc.buildout']
pip_path = sorted({d.location for d in pip_dists})
logger.debug('after restricting versions: pip_path %r', pip_path)
pip_pythonpath = os.pathsep.join(pip_path)
setuptools_path = pip_path
setuptools_pythonpath = pip_pythonpath
def build(spec, dest, build_ext,
links=(), index=None,
executable=sys.executable,
path=None, newest=True, versions=None, allow_hosts=('*',)):
assert executable == sys.executable, (executable, sys.executable)
installer = Installer(dest, links, index, executable,
True, path, newest,
versions, allow_hosts=allow_hosts)
return installer.build(spec, build_ext)
def _rm(*paths):
for path in paths:
if os.path.isdir(path):