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#!/usr/bin/env python
Easy Install
A tool for doing automatic download/extract/build of distutils-based Python
packages. For detailed documentation, see the accompanying EasyInstall.txt
file, or visit the `EasyInstall home page`__.
from glob import glob
from distutils.util import get_platform
from distutils.util import convert_path, subst_vars
from distutils.errors import (
DistutilsArgError, DistutilsOptionError,
DistutilsError, DistutilsPlatformError,
from distutils.command.install import INSTALL_SCHEMES, SCHEME_KEYS
from distutils import log, dir_util
from distutils.command.build_scripts import first_line_re
from distutils.spawn import find_executable
import sys
import os
import zipimport
import shutil
import tempfile
import zipfile
import re
import stat
import random
import textwrap
import warnings
import site
import struct
import contextlib
import subprocess
import shlex
import io
from setuptools.extern import six
from setuptools.extern.six.moves import configparser, map
from setuptools import Command
from setuptools.sandbox import run_setup
from setuptools.py31compat import get_path, get_config_vars
from setuptools.py27compat import rmtree_safe
from setuptools.command import setopt
from setuptools.archive_util import unpack_archive
from setuptools.package_index import (
PackageIndex, parse_requirement_arg, URL_SCHEME,
from setuptools.command import bdist_egg, egg_info
from pkg_resources import (
yield_lines, normalize_path, resource_string, ensure_directory,
get_distribution, find_distributions, Environment, Requirement,
Distribution, PathMetadata, EggMetadata, WorkingSet, DistributionNotFound,
VersionConflict, DEVELOP_DIST,
import pkg_resources.py31compat
# Turn on PEP440Warnings
warnings.filterwarnings("default", category=pkg_resources.PEP440Warning)
__all__ = [
'samefile', 'easy_install', 'PthDistributions', 'extract_wininst_cfg',
'main', 'get_exe_prefixes',
def is_64bit():
return struct.calcsize("P") == 8
def samefile(p1, p2):
Determine if two paths reference the same file.
Augments os.path.samefile to work on Windows and
suppresses errors if the path doesn't exist.
both_exist = os.path.exists(p1) and os.path.exists(p2)
use_samefile = hasattr(os.path, 'samefile') and both_exist
if use_samefile:
return os.path.samefile(p1, p2)
norm_p1 = os.path.normpath(os.path.normcase(p1))
norm_p2 = os.path.normpath(os.path.normcase(p2))
return norm_p1 == norm_p2
if six.PY2:
def _to_ascii(s):
return s
def isascii(s):
six.text_type(s, 'ascii')
return True
except UnicodeError:
return False
def _to_ascii(s):
return s.encode('ascii')
def isascii(s):
return True
except UnicodeError:
return False
_one_liner = lambda text: textwrap.dedent(text).strip().replace('\n', '; ')
class easy_install(Command):
"""Manage a download/build/install process"""
description = "Find/get/install Python packages"
command_consumes_arguments = True
user_options = [
('prefix=', None, "installation prefix"),
("zip-ok", "z", "install package as a zipfile"),
("multi-version", "m", "make apps have to require() a version"),
("upgrade", "U", "force upgrade (searches PyPI for latest versions)"),
("install-dir=", "d", "install package to DIR"),
("script-dir=", "s", "install scripts to DIR"),
("exclude-scripts", "x", "Don't install scripts"),
("always-copy", "a", "Copy all needed packages to install dir"),
("index-url=", "i", "base URL of Python Package Index"),
("find-links=", "f", "additional URL(s) to search for packages"),
("build-directory=", "b",
"download/extract/build in DIR; keep the results"),
('optimize=', 'O',
"also compile with optimization: -O1 for \"python -O\", "
"-O2 for \"python -OO\", and -O0 to disable [default: -O0]"),
('record=', None,
"filename in which to record list of installed files"),
('always-unzip', 'Z', "don't install as a zipfile, no matter what"),
('site-dirs=', 'S', "list of directories where .pth files work"),
('editable', 'e', "Install specified packages in editable form"),
('no-deps', 'N', "don't install dependencies"),
('allow-hosts=', 'H', "pattern(s) that hostnames must match"),
('local-snapshots-ok', 'l',
"allow building eggs from local checkouts"),
('version', None, "print version information and exit"),
('no-find-links', None,
"Don't load find-links defined in packages being installed")
boolean_options = [
'zip-ok', 'multi-version', 'exclude-scripts', 'upgrade', 'always-copy',
'no-deps', 'local-snapshots-ok', 'version'
help_msg = "install in user site-package '%s'" % site.USER_SITE
user_options.append(('user', None, help_msg))
negative_opt = {'always-unzip': 'zip-ok'}
create_index = PackageIndex
def initialize_options(self):
# the --user option seems to be an opt-in one,
# so the default should be False.
self.user = 0
self.zip_ok = self.local_snapshots_ok = None
self.install_dir = self.script_dir = self.exclude_scripts = None
self.index_url = None
self.find_links = None
self.build_directory = None
self.args = None
self.optimize = self.record = None
self.upgrade = self.always_copy = self.multi_version = None
self.editable = self.no_deps = self.allow_hosts = None
self.root = self.prefix = self.no_report = None
self.version = None
self.install_purelib = None # for pure module distributions
self.install_platlib = None # non-pure (dists w/ extensions)
self.install_headers = None # for C/C++ headers
self.install_lib = None # set to either purelib or platlib
self.install_scripts = None
self.install_data = None
self.install_base = None
self.install_platbase = None
self.install_userbase = site.USER_BASE
self.install_usersite = site.USER_SITE
self.install_userbase = None
self.install_usersite = None
self.no_find_links = None
# Options not specifiable via command line
self.package_index = None
self.pth_file = self.always_copy_from = None
self.site_dirs = None
self.installed_projects = {}
self.sitepy_installed = False
# Always read easy_install options, even if we are subclassed, or have
# an independent instance created. This ensures that defaults will
# always come from the standard configuration file(s)' "easy_install"
# section, even if this is a "develop" or "install" command, or some
# other embedding.
self._dry_run = None
self.verbose = self.distribution.verbose
self, self.distribution.get_option_dict('easy_install')
def delete_blockers(self, blockers):
extant_blockers = (
filename for filename in blockers
if os.path.exists(filename) or os.path.islink(filename)
list(map(self._delete_path, extant_blockers))
def _delete_path(self, path):"Deleting %s", path)
if self.dry_run:
is_tree = os.path.isdir(path) and not os.path.islink(path)
remover = rmtree if is_tree else os.unlink
def _render_version():
Render the Setuptools version and installation details, then exit.
ver = sys.version[:3]
dist = get_distribution('setuptools')
tmpl = 'setuptools {dist.version} from {dist.location} (Python {ver})'
raise SystemExit()
def finalize_options(self):
self.version and self._render_version()
py_version = sys.version.split()[0]
prefix, exec_prefix = get_config_vars('prefix', 'exec_prefix')
self.config_vars = {
'dist_name': self.distribution.get_name(),
'dist_version': self.distribution.get_version(),
'dist_fullname': self.distribution.get_fullname(),
'py_version': py_version,
'py_version_short': py_version[0:3],
'py_version_nodot': py_version[0] + py_version[2],
'sys_prefix': prefix,
'prefix': prefix,
'sys_exec_prefix': exec_prefix,
'exec_prefix': exec_prefix,
# Only python 3.2+ has abiflags
'abiflags': getattr(sys, 'abiflags', ''),
self.config_vars['userbase'] = self.install_userbase
self.config_vars['usersite'] = self.install_usersite
'install_dir', 'script_dir', 'build_directory',
# If a non-default installation directory was specified, default the
# script directory to match it.
if self.script_dir is None:
self.script_dir = self.install_dir
if self.no_find_links is None:
self.no_find_links = False
# Let install_dir get set by install_lib command, which in turn
# gets its info from the install command, and takes into account
# --prefix and --home and all that other crud.
'install_lib', ('install_dir', 'install_dir')
# Likewise, set default script_dir from 'install_scripts.install_dir'
'install_scripts', ('install_dir', 'script_dir')
if self.user and self.install_purelib:
self.install_dir = self.install_purelib
self.script_dir = self.install_scripts
# default --record from the install command
self.set_undefined_options('install', ('record', 'record'))
# Should this be moved to the if statement below? It's not used
# elsewhere
normpath = map(normalize_path, sys.path)
self.all_site_dirs = get_site_dirs()
if self.site_dirs is not None:
site_dirs = [
os.path.expanduser(s.strip()) for s in
for d in site_dirs:
if not os.path.isdir(d):
log.warn("%s (in --site-dirs) does not exist", d)
elif normalize_path(d) not in normpath:
raise DistutilsOptionError(
d + " (in --site-dirs) is not on sys.path"
if not self.editable:
self.index_url = self.index_url or ""
self.shadow_path = self.all_site_dirs[:]
for path_item in self.install_dir, normalize_path(self.script_dir):
if path_item not in self.shadow_path:
self.shadow_path.insert(0, path_item)
if self.allow_hosts is not None:
hosts = [s.strip() for s in self.allow_hosts.split(',')]
hosts = ['*']
if self.package_index is None:
self.package_index = self.create_index(
self.index_url, search_path=self.shadow_path, hosts=hosts,
self.local_index = Environment(self.shadow_path + sys.path)
if self.find_links is not None:
if isinstance(self.find_links, six.string_types):
self.find_links = self.find_links.split()
self.find_links = []
if self.local_snapshots_ok:
self.package_index.scan_egg_links(self.shadow_path + sys.path)
if not self.no_find_links:
self.set_undefined_options('install_lib', ('optimize', 'optimize'))
if not isinstance(self.optimize, int):
self.optimize = int(self.optimize)
if not (0 <= self.optimize <= 2):
raise ValueError
except ValueError:
raise DistutilsOptionError("--optimize must be 0, 1, or 2")
if self.editable and not self.build_directory:
raise DistutilsArgError(
"Must specify a build directory (-b) when using --editable"
if not self.args:
raise DistutilsArgError(
"No urls, filenames, or requirements specified (see --help)")
self.outputs = []
def _fix_install_dir_for_user_site(self):
Fix the install_dir if "--user" was used.
if not self.user or not site.ENABLE_USER_SITE:
if self.install_userbase is None:
msg = "User base directory is not specified"
raise DistutilsPlatformError(msg)
self.install_base = self.install_platbase = self.install_userbase
scheme_name ='posix', 'unix') + '_user'
def _expand_attrs(self, attrs):
for attr in attrs:
val = getattr(self, attr)
if val is not None:
if == 'posix' or == 'nt':
val = os.path.expanduser(val)
val = subst_vars(val, self.config_vars)
setattr(self, attr, val)
def expand_basedirs(self):
"""Calls `os.path.expanduser` on install_base, install_platbase and
self._expand_attrs(['install_base', 'install_platbase', 'root'])
def expand_dirs(self):
"""Calls `os.path.expanduser` on install dirs."""
dirs = [
def run(self):
if self.verbose != self.distribution.verbose:
for spec in self.args:
self.easy_install(spec, not self.no_deps)
if self.record:
outputs = self.outputs
if self.root: # strip any package prefix
root_len = len(self.root)
for counter in range(len(outputs)):
outputs[counter] = outputs[counter][root_len:]
from distutils import file_util
file_util.write_file, (self.record, outputs),
"writing list of installed files to '%s'" %
def pseudo_tempname(self):
"""Return a pseudo-tempname base in the install directory.
This code is intentionally naive; if a malicious party can write to
the target directory you're already in deep doodoo.
pid = os.getpid()
except Exception:
pid = random.randint(0, sys.maxsize)
return os.path.join(self.install_dir, "test-easy-install-%s" % pid)
def warn_deprecated_options(self):
def check_site_dir(self):
"""Verify that self.install_dir is .pth-capable dir, if needed"""
instdir = normalize_path(self.install_dir)
pth_file = os.path.join(instdir, 'easy-install.pth')
# Is it a configured, PYTHONPATH, implicit, or explicit site dir?
is_site_dir = instdir in self.all_site_dirs
if not is_site_dir and not self.multi_version:
# No? Then directly test whether it does .pth file processing
is_site_dir = self.check_pth_processing()
# make sure we can write to target dir
testfile = self.pseudo_tempname() + '.write-test'
test_exists = os.path.exists(testfile)
if test_exists:
open(testfile, 'w').close()
except (OSError, IOError):
if not is_site_dir and not self.multi_version:
# Can't install non-multi to non-site dir
raise DistutilsError(self.no_default_version_msg())
if is_site_dir:
if self.pth_file is None:
self.pth_file = PthDistributions(pth_file, self.all_site_dirs)
self.pth_file = None
if instdir not in map(normalize_path, _pythonpath()):
# only PYTHONPATH dirs need a, so pretend it's there
self.sitepy_installed = True
elif self.multi_version and not os.path.exists(pth_file):
self.sitepy_installed = True # don't need in this case
self.pth_file = None # and don't create a .pth file
self.install_dir = instdir
__cant_write_msg = textwrap.dedent("""
can't create or remove files in install directory
The following error occurred while trying to add or remove files in the
installation directory:
The installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:
__not_exists_id = textwrap.dedent("""
This directory does not currently exist. Please create it and try again, or
choose a different installation directory (using the -d or --install-dir
__access_msg = textwrap.dedent("""
Perhaps your account does not have write access to this directory? If the
installation directory is a system-owned directory, you may need to sign in
as the administrator or "root" account. If you do not have administrative
access to this machine, you may wish to choose a different installation
directory, preferably one that is listed in your PYTHONPATH environment
For information on other options, you may wish to consult the
documentation at:
Please make the appropriate changes for your system and try again.
def cant_write_to_target(self):
msg = self.__cant_write_msg % (sys.exc_info()[1], self.install_dir,)
if not os.path.exists(self.install_dir):
msg += '\n' + self.__not_exists_id
msg += '\n' + self.__access_msg
raise DistutilsError(msg)
def check_pth_processing(self):
"""Empirically verify whether .pth files are supported in inst. dir"""
instdir = self.install_dir"Checking .pth file support in %s", instdir)
pth_file = self.pseudo_tempname() + ".pth"
ok_file = pth_file + '.ok'
ok_exists = os.path.exists(ok_file)
tmpl = _one_liner("""
import os
f = open({ok_file!r}, 'w')
""") + '\n'
if ok_exists:
dirname = os.path.dirname(ok_file)
pkg_resources.py31compat.makedirs(dirname, exist_ok=True)
f = open(pth_file, 'w')
except (OSError, IOError):
f = None
executable = sys.executable
if == 'nt':
dirname, basename = os.path.split(executable)
alt = os.path.join(dirname, 'pythonw.exe')
use_alt = (
basename.lower() == 'python.exe' and
if use_alt:
# use pythonw.exe to avoid opening a console window
executable = alt
from distutils.spawn import spawn
spawn([executable, '-E', '-c', 'pass'], 0)
if os.path.exists(ok_file):
"TEST PASSED: %s appears to support .pth files",
return True
if f:
if os.path.exists(ok_file):
if os.path.exists(pth_file):
if not self.multi_version:
log.warn("TEST FAILED: %s does NOT support .pth files", instdir)
return False
def install_egg_scripts(self, dist):
"""Write all the scripts for `dist`, unless scripts are excluded"""
if not self.exclude_scripts and dist.metadata_isdir('scripts'):
for script_name in dist.metadata_listdir('scripts'):
if dist.metadata_isdir('scripts/' + script_name):
# The "script" is a directory, likely a Python 3
# __pycache__ directory, so skip it.
dist, script_name,
dist.get_metadata('scripts/' + script_name)
def add_output(self, path):
if os.path.isdir(path):
for base, dirs, files in os.walk(path):
for filename in files:
self.outputs.append(os.path.join(base, filename))
def not_editable(self, spec):
if self.editable:
raise DistutilsArgError(
"Invalid argument %r: you can't use filenames or URLs "
"with --editable (except via the --find-links option)."
% (spec,)
def check_editable(self, spec):
if not self.editable:
if os.path.exists(os.path.join(self.build_directory, spec.key)):
raise DistutilsArgError(
"%r already exists in %s; can't do a checkout there" %
(spec.key, self.build_directory)
def _tmpdir(self):
tmpdir = tempfile.mkdtemp(prefix=six.u("easy_install-"))
# cast to str as workaround for #709 and #710 and #712
yield str(tmpdir)
os.path.exists(tmpdir) and rmtree(rmtree_safe(tmpdir))
def easy_install(self, spec, deps=False):
if not self.editable:
with self._tmpdir() as tmpdir:
if not isinstance(spec, Requirement):
if URL_SCHEME(spec):
# It's a url, download it to tmpdir and process
dl =, tmpdir)
return self.install_item(None, dl, tmpdir, deps, True)
elif os.path.exists(spec):
# Existing file or directory, just process it directly
return self.install_item(None, spec, tmpdir, deps, True)
spec = parse_requirement_arg(spec)
dist = self.package_index.fetch_distribution(
spec, tmpdir, self.upgrade, self.editable,
not self.always_copy, self.local_index
if dist is None:
msg = "Could not find suitable distribution for %r" % spec
if self.always_copy:
msg += " (--always-copy skips system and development eggs)"
raise DistutilsError(msg)
elif dist.precedence == DEVELOP_DIST:
# .egg-info dists don't need installing, just process deps
self.process_distribution(spec, dist, deps, "Using")
return dist
return self.install_item(spec, dist.location, tmpdir, deps)
def install_item(self, spec, download, tmpdir, deps, install_needed=False):
# Installation is also needed if file in tmpdir or is not an egg
install_needed = install_needed or self.always_copy
install_needed = install_needed or os.path.dirname(download) == tmpdir
install_needed = install_needed or not download.endswith('.egg')
install_needed = install_needed or (
self.always_copy_from is not None and
os.path.dirname(normalize_path(download)) ==
if spec and not install_needed:
# at this point, we know it's a local .egg, we just don't know if
# it's already installed.
for dist in self.local_index[spec.project_name]:
if dist.location == download:
install_needed = True # it's not in the local index"Processing %s", os.path.basename(download))
if install_needed:
dists = self.install_eggs(spec, download, tmpdir)
for dist in dists:
self.process_distribution(spec, dist, deps)
dists = [self.egg_distribution(download)]
self.process_distribution(spec, dists[0], deps, "Using")
if spec is not None:
for dist in dists:
if dist in spec:
return dist
def select_scheme(self, name):
"""Sets the install directories by applying the install schemes."""
# it's the caller's problem if they supply a bad name!
scheme = INSTALL_SCHEMES[name]
for key in SCHEME_KEYS:
attrname = 'install_' + key
if getattr(self, attrname) is None:
setattr(self, attrname, scheme[key])
def process_distribution(self, requirement, dist, deps=True, *info):
if dist in self.local_index[dist.key]:
self.installed_projects[dist.key] = dist, dist, *info))
if (dist.has_metadata('dependency_links.txt') and
not self.no_find_links):
if not deps and not self.always_copy:
elif requirement is not None and dist.key != requirement.key:
log.warn("Skipping dependencies for %s", dist)
return # XXX this is not the distribution we were looking for
elif requirement is None or dist not in requirement:
# if we wound up with a different version, resolve what we've got
distreq = dist.as_requirement()
requirement = Requirement(str(distreq))"Processing dependencies for %s", requirement)
distros = WorkingSet([]).resolve(
[requirement], self.local_index, self.easy_install
except DistributionNotFound as e:
raise DistutilsError(str(e))
except VersionConflict as e:
raise DistutilsError(
if self.always_copy or self.always_copy_from:
# Force all the relevant distros to be copied or activated
for dist in distros:
if dist.key not in self.installed_projects:
self.easy_install(dist.as_requirement())"Finished processing dependencies for %s", requirement)
def should_unzip(self, dist):
if self.zip_ok is not None:
return not self.zip_ok
if dist.has_metadata('not-zip-safe'):
return True
if not dist.has_metadata('zip-safe'):
return True
return False
def maybe_move(self, spec, dist_filename, setup_base):
dst = os.path.join(self.build_directory, spec.key)
if os.path.exists(dst):
msg = (
"%r already exists in %s; build directory %s will not be kept"
log.warn(msg, spec.key, self.build_directory, setup_base)
return setup_base
if os.path.isdir(dist_filename):
setup_base = dist_filename
if os.path.dirname(dist_filename) == setup_base:
os.unlink(dist_filename) # get it out of the tmp dir
contents = os.listdir(setup_base)
if len(contents) == 1:
dist_filename = os.path.join(setup_base, contents[0])
if os.path.isdir(dist_filename):
# if the only thing there is a directory, move it instead
setup_base = dist_filename
shutil.move(setup_base, dst)
return dst
def install_wrapper_scripts(self, dist):
if self.exclude_scripts:
for args in
def install_script(self, dist, script_name, script_text, dev_path=None):
"""Generate a legacy script wrapper and install it"""
spec = str(dist.as_requirement())
is_script = is_python_script(script_text, script_name)
if is_script:
body = self._load_template(dev_path) % locals()
script_text = ScriptWriter.get_header(script_text) + body
self.write_script(script_name, _to_ascii(script_text), 'b')
def _load_template(dev_path):
There are a couple of template scripts in the package. This
function loads one of them and prepares it for use.
# See for info
# on script file naming and downstream issues with SVR4
name = 'script.tmpl'
if dev_path:
name = name.replace('.tmpl', ' (dev).tmpl')
raw_bytes = resource_string('setuptools', name)
return raw_bytes.decode('utf-8')
def write_script(self, script_name, contents, mode="t", blockers=()):
"""Write an executable file to the scripts directory"""
self.delete_blockers( # clean up old .py/.pyw w/o a script
[os.path.join(self.script_dir, x) for x in blockers]
)"Installing %s script to %s", script_name, self.script_dir)
target = os.path.join(self.script_dir, script_name)
mask = current_umask()
if not self.dry_run:
if os.path.exists(target):
with open(target, "w" + mode) as f:
chmod(target, 0o777 - mask)
def install_eggs(self, spec, dist_filename, tmpdir):
# .egg dirs or files are already built, so just return them
if dist_filename.lower().endswith('.egg'):
return [self.install_egg(dist_filename, tmpdir)]
elif dist_filename.lower().endswith('.exe'):
return [self.install_exe(dist_filename, tmpdir)]
# Anything else, try to extract and build
setup_base = tmpdir
if os.path.isfile(dist_filename) and not dist_filename.endswith('.py'):
unpack_archive(dist_filename, tmpdir, self.unpack_progress)
elif os.path.isdir(dist_filename):
setup_base = os.path.abspath(dist_filename)
if (setup_base.startswith(tmpdir) # something we downloaded
and self.build_directory and spec is not None):
setup_base = self.maybe_move(spec, dist_filename, setup_base)
# Find the file
setup_script = os.path.join(setup_base, '')
if not os.path.exists(setup_script):
setups = glob(os.path.join(setup_base, '*', ''))
if not setups:
raise DistutilsError(
"Couldn't find a setup script in %s" %
if len(setups) > 1:
raise DistutilsError(
"Multiple setup scripts in %s" %
setup_script = setups[0]
# Now run it, and return the result
if self.editable:, setup_script))
return []
return self.build_and_install(setup_script, setup_base)
def egg_distribution(self, egg_path):
if os.path.isdir(egg_path):
metadata = PathMetadata(egg_path, os.path.join(egg_path,
metadata = EggMetadata(zipimport.zipimporter(egg_path))
return Distribution.from_filename(egg_path, metadata=metadata)
def install_egg(self, egg_path, tmpdir):
destination = os.path.join(
destination = os.path.abspath(destination)
if not self.dry_run:
dist = self.egg_distribution(egg_path)
if not samefile(egg_path, destination):
if os.path.isdir(destination) and not os.path.islink(destination):
dir_util.remove_tree(destination, dry_run=self.dry_run)
elif os.path.exists(destination):
"Removing " + destination,
new_dist_is_zipped = False
if os.path.isdir(egg_path):
if egg_path.startswith(tmpdir):
f, m = shutil.move, "Moving"
f, m = shutil.copytree, "Copying"
elif self.should_unzip(dist):
f, m = self.unpack_and_compile, "Extracting"
new_dist_is_zipped = True
if egg_path.startswith(tmpdir):
f, m = shutil.move, "Moving"
f, m = shutil.copy2, "Copying"
(egg_path, destination),
(m + " %s to %s") % (
except Exception:
update_dist_caches(destination, fix_zipimporter_caches=False)
return self.egg_distribution(destination)
def install_exe(self, dist_filename, tmpdir):
# See if it's valid, get data
cfg = extract_wininst_cfg(dist_filename)
if cfg is None:
raise DistutilsError(
"%s is not a valid distutils Windows .exe" % dist_filename
# Create a dummy distribution object until we build the real distro
dist = Distribution(
project_name=cfg.get('metadata', 'name'),
version=cfg.get('metadata', 'version'), platform=get_platform(),
# Convert the .exe to an unpacked egg
egg_path = os.path.join(tmpdir, dist.egg_name() + '.egg')
dist.location = egg_path
egg_tmp = egg_path + '.tmp'
_egg_info = os.path.join(egg_tmp, 'EGG-INFO')
pkg_inf = os.path.join(_egg_info, 'PKG-INFO')
ensure_directory(pkg_inf) # make sure EGG-INFO dir exists
dist._provider = PathMetadata(egg_tmp, _egg_info) # XXX
self.exe_to_egg(dist_filename, egg_tmp)
if not os.path.exists(pkg_inf):
f = open(pkg_inf, 'w')
f.write('Metadata-Version: 1.0\n')
for k, v in cfg.items('metadata'):
if k != 'target_version':
f.write('%s: %s\n' % (k.replace('_', '-').title(), v))
script_dir = os.path.join(_egg_info, 'scripts')
# delete entry-point scripts to avoid duping
os.path.join(script_dir, args[0])
for args in ScriptWriter.get_args(dist)
# Build .egg file from tmpdir
egg_path, egg_tmp, verbose=self.verbose, dry_run=self.dry_run,
# install the .egg
return self.install_egg(egg_path, tmpdir)
def exe_to_egg(self, dist_filename, egg_tmp):
"""Extract a bdist_wininst to the directories an egg would use"""
# Check for .pth file and set up prefix translations
prefixes = get_exe_prefixes(dist_filename)
to_compile = []
native_libs = []
top_level = {}
def process(src, dst):
s = src.lower()
for old, new in prefixes:
if s.startswith(old):
src = new + src[len(old):]
parts = src.split('/')
dst = os.path.join(egg_tmp, *parts)
dl = dst.lower()
if dl.endswith('.pyd') or dl.endswith('.dll'):
parts[-1] = bdist_egg.strip_module(parts[-1])
top_level[os.path.splitext(parts[0])[0]] = 1
elif dl.endswith('.py') and old != 'SCRIPTS/':
top_level[os.path.splitext(parts[0])[0]] = 1
return dst
if not src.endswith('.pth'):
log.warn("WARNING: can't process %s", src)
return None
# extract, tracking .pyd/.dll->native_libs and .py -> to_compile
unpack_archive(dist_filename, egg_tmp, process)
stubs = []
for res in native_libs:
if res.lower().endswith('.pyd'): # create stubs for .pyd's
parts = res.split('/')
resource = parts[-1]
parts[-1] = bdist_egg.strip_module(parts[-1]) + '.py'
pyfile = os.path.join(egg_tmp, *parts)
bdist_egg.write_stub(resource, pyfile)
self.byte_compile(to_compile) # compile .py's
os.path.join(egg_tmp, 'EGG-INFO'),
bdist_egg.analyze_egg(egg_tmp, stubs)) # write zip-safety flag
for name in 'top_level', 'native_libs':
if locals()[name]:
txt = os.path.join(egg_tmp, 'EGG-INFO', name + '.txt')
if not os.path.exists(txt):
f = open(txt, 'w')
f.write('\n'.join(locals()[name]) + '\n')
__mv_warning = textwrap.dedent("""
Because this distribution was installed --multi-version, before you can
import modules from this package in an application, you will need to
'import pkg_resources' and then use a 'require()' call similar to one of
these examples, in order to select the desired version:
pkg_resources.require("%(name)s") # latest installed version
pkg_resources.require("%(name)s==%(version)s") # this exact version
pkg_resources.require("%(name)s>=%(version)s") # this version or higher
__id_warning = textwrap.dedent("""
Note also that the installation directory must be on sys.path at runtime for
this to work. (e.g. by being the application's script directory, by being on
PYTHONPATH, or by being added to sys.path by your code.)
def installation_report(self, req, dist, what="Installed"):
"""Helpful installation message for display to package users"""
msg = "\n%(what)s %(eggloc)s%(extras)s"
if self.multi_version and not self.no_report:
msg += '\n' + self.__mv_warning
if self.install_dir not in map(normalize_path, sys.path):
msg += '\n' + self.__id_warning
eggloc = dist.location
name = dist.project_name
version = dist.version
extras = '' # TODO: self.report_extras(req, dist)
return msg % locals()
__editable_msg = textwrap.dedent("""
Extracted editable version of %(spec)s to %(dirname)s
If it uses setuptools in its setup script, you can activate it in
"development" mode by going to that directory and running::
%(python)s develop
See the setuptools documentation for the "develop" command for more info.
def report_editable(self, spec, setup_script):
dirname = os.path.dirname(setup_script)
python = sys.executable
return '\n' + self.__editable_msg % locals()
def run_setup(self, setup_script, setup_base, args):
sys.modules.setdefault('distutils.command.bdist_egg', bdist_egg)
sys.modules.setdefault('distutils.command.egg_info', egg_info)
args = list(args)
if self.verbose > 2:
v = 'v' * (self.verbose - 1)
args.insert(0, '-' + v)
elif self.verbose < 2:
args.insert(0, '-q')
if self.dry_run:
args.insert(0, '-n')
"Running %s %s", setup_script[len(setup_base) + 1:], ' '.join(args)
run_setup(setup_script, args)
except SystemExit as v:
raise DistutilsError("Setup script exited with %s" % (v.args[0],))
def build_and_install(self, setup_script, setup_base):
args = ['bdist_egg', '--dist-dir']
dist_dir = tempfile.mkdtemp(
prefix='egg-dist-tmp-', dir=os.path.dirname(setup_script)
self.run_setup(setup_script, setup_base, args)
all_eggs = Environment([dist_dir])
eggs = []
for key in all_eggs:
for dist in all_eggs[key]:
eggs.append(self.install_egg(dist.location, setup_base))
if not eggs and not self.dry_run:
log.warn("No eggs found in %s (setup script problem?)",
return eggs
log.set_verbosity(self.verbose) # restore our log verbosity
def _set_fetcher_options(self, base):
When easy_install is about to run bdist_egg on a source dist, that
source dist might have 'setup_requires' directives, requiring
additional fetching. Ensure the fetcher options given to easy_install
are available to that command as well.
# find the fetch options from easy_install and write them out
# to the setup.cfg file.
ei_opts = self.distribution.get_option_dict('easy_install').copy()
fetch_directives = (
'find_links', 'site_dirs', 'index_url', 'optimize',
'site_dirs', 'allow_hosts',
fetch_options = {}
for key, val in ei_opts.items():
if key not in fetch_directives:
fetch_options[key.replace('_', '-')] = val[1]
# create a settings dictionary suitable for `edit_config`
settings = dict(easy_install=fetch_options)
cfg_filename = os.path.join(base, 'setup.cfg')
setopt.edit_config(cfg_filename, settings)
def update_pth(self, dist):
if self.pth_file is None:
for d in self.pth_file[dist.key]: # drop old entries
if self.multi_version or d.location != dist.location:"Removing %s from easy-install.pth file", d)
if d.location in self.shadow_path:
if not self.multi_version:
if dist.location in self.pth_file.paths:
"%s is already the active version in easy-install.pth",
else:"Adding %s to easy-install.pth file", dist)
self.pth_file.add(dist) # add new entry
if dist.location not in self.shadow_path:
if not self.dry_run:
if dist.key == 'setuptools':
# Ensure that setuptools itself never becomes unavailable!
# XXX should this check for latest version?
filename = os.path.join(self.install_dir, 'setuptools.pth')
if os.path.islink(filename):
f = open(filename, 'wt')
f.write(self.pth_file.make_relative(dist.location) + '\n')
def unpack_progress(self, src, dst):
# Progress filter for unpacking
log.debug("Unpacking %s to %s", src, dst)
return dst # only unpack-and-compile skips files for dry run
def unpack_and_compile(self, egg_path, destination):
to_compile = []
to_chmod = []
def pf(src, dst):
if dst.endswith('.py') and not src.startswith('EGG-INFO/'):
elif dst.endswith('.dll') or dst.endswith('.so'):
self.unpack_progress(src, dst)
return not self.dry_run and dst or None
unpack_archive(egg_path, destination, pf)
if not self.dry_run:
for f in to_chmod:
mode = ((os.stat(f)[stat.ST_MODE]) | 0o555) & 0o7755
chmod(f, mode)
def byte_compile(self, to_compile):
if sys.dont_write_bytecode:
self.warn('byte-compiling is disabled, skipping.')
from distutils.util import byte_compile
# try to make the byte compile messages quieter
log.set_verbosity(self.verbose - 1)
byte_compile(to_compile, optimize=0, force=1, dry_run=self.dry_run)
if self.optimize:
to_compile, optimize=self.optimize, force=1,
log.set_verbosity(self.verbose) # restore original verbosity
__no_default_msg = textwrap.dedent("""
bad install directory or PYTHONPATH
You are attempting to install a package to a directory that is not
on PYTHONPATH and which Python does not read ".pth" files from. The
installation directory you specified (via --install-dir, --prefix, or
the distutils default setting) was:
and your PYTHONPATH environment variable currently contains:
Here are some of your options for correcting the problem:
* You can choose a different installation directory, i.e., one that is
on PYTHONPATH or supports .pth files
* You can add the installation directory to the PYTHONPATH environment
variable. (It must then also be on PYTHONPATH whenever you run
Python and want to use the package(s) you are installing.)
* You can set up the installation directory to support ".pth" files by
using one of the approaches described here:
Please make the appropriate changes for your system and try again.""").lstrip()
def no_default_version_msg(self):
template = self.__no_default_msg
return template % (self.install_dir, os.environ.get('PYTHONPATH', ''))
def install_site_py(self):
"""Make sure there's a in the target dir, if needed"""
if self.sitepy_installed:
return # already did it, or don't need to
sitepy = os.path.join(self.install_dir, "")
source = resource_string("setuptools", "")
source = source.decode('utf-8')
current = ""
if os.path.exists(sitepy):
log.debug("Checking existing in %s", self.install_dir)
with as strm:
current =
if not current.startswith('def __boot():'):
raise DistutilsError(
"%s is not a setuptools-generated; please"
" remove it." % sitepy
if current != source:"Creating %s", sitepy)
if not self.dry_run:
with, 'w', encoding='utf-8') as strm:
self.sitepy_installed = True
def create_home_path(self):
"""Create directories under ~."""
if not self.user:
home = convert_path(os.path.expanduser("~"))
for name, path in six.iteritems(self.config_vars):
if path.startswith(home) and not os.path.isdir(path):
self.debug_print("os.makedirs('%s', 0o700)" % path)
os.makedirs(path, 0o700)
def _expand(self, *attrs):
config_vars = self.get_finalized_command('install').config_vars
if self.prefix:
# Set default install_dir/scripts from --prefix
config_vars = config_vars.copy()
config_vars['base'] = self.prefix
scheme = self.INSTALL_SCHEMES.get(, self.DEFAULT_SCHEME)
for attr, val in scheme.items():
if getattr(self, attr, None) is None:
setattr(self, attr, val)
from distutils.util import subst_vars
for attr in attrs:
val = getattr(self, attr)
if val is not None:
val = subst_vars(val, config_vars)
if == 'posix':
val = os.path.expanduser(val)
setattr(self, attr, val)
def _pythonpath():
items = os.environ.get('PYTHONPATH', '').split(os.pathsep)
return filter(None, items)
def get_site_dirs():
Return a list of 'site' dirs
sitedirs = []
# start with PYTHONPATH
prefixes = [sys.prefix]
if sys.exec_prefix != sys.prefix:
for prefix in prefixes:
if prefix:
if sys.platform in ('os2emx', 'riscos'):
sitedirs.append(os.path.join(prefix, "Lib", "site-packages"))
elif os.sep == '/':
"python" + sys.version[:3],
os.path.join(prefix, "lib", "site-python"),
os.path.join(prefix, "lib", "site-packages"),
if sys.platform == 'darwin':
# for framework builds *only* we add the standard Apple
# locations. Currently only per-user, but /Library and
# /Network/Library could be added too
if 'Python.framework' in prefix:
home = os.environ.get('HOME')
if home:
home_sp = os.path.join(
lib_paths = get_path('purelib'), get_path('platlib')
for site_lib in lib_paths:
if site_lib not in sitedirs:
except AttributeError:
sitedirs = list(map(normalize_path, sitedirs))
return sitedirs
def expand_paths(inputs):
"""Yield sys.path directories that might contain "old-style" packages"""
seen = {}
for dirname in inputs:
dirname = normalize_path(dirname)
if dirname in seen:
seen[dirname] = 1
if not os.path.isdir(dirname):
files = os.listdir(dirname)
yield dirname, files
for name in files:
if not name.endswith('.pth'):
# We only care about the .pth files
if name in ('easy-install.pth', 'setuptools.pth'):
# Ignore .pth files that we control
# Read the .pth file
f = open(os.path.join(dirname, name))
lines = list(yield_lines(f))
# Yield existing non-dupe, non-import directory lines from it
for line in lines:
if not line.startswith("import"):
line = normalize_path(line.rstrip())
if line not in seen:
seen[line] = 1
if not os.path.isdir(line):
yield line, os.listdir(line)
def extract_wininst_cfg(dist_filename):
"""Extract configuration data from a bdist_wininst .exe
Returns a configparser.RawConfigParser, or None
f = open(dist_filename, 'rb')
endrec = zipfile._EndRecData(f)
if endrec is None:
return None
prepended = (endrec[9] - endrec[5]) - endrec[6]
if prepended < 12: # no wininst data here
return None - 12)
tag, cfglen, bmlen = struct.unpack("<iii",
if tag not in (0x1234567A, 0x1234567B):
return None # not a valid tag - (12 + cfglen))
init = {'version': '', 'target_version': ''}
cfg = configparser.RawConfigParser(init)
part =
# Read up to the first null byte.
config = part.split(b'\0', 1)[0]
# Now the config is in bytes, but for RawConfigParser, it should
# be text, so decode it.
config = config.decode(sys.getfilesystemencoding())
except configparser.Error:
return None
if not cfg.has_section('metadata') or not cfg.has_section('Setup'):
return None
return cfg
def get_exe_prefixes(exe_filename):
"""Get exe->egg path translations for a given .exe file"""
prefixes = [
('PURELIB/', ''),
('PLATLIB/pywin32_system32', ''),
('PLATLIB/', ''),
('SCRIPTS/', 'EGG-INFO/scripts/'),
('DATA/lib/site-packages', ''),
z = zipfile.ZipFile(exe_filename)
for info in z.infolist():
name = info.filename
parts = name.split('/')
if len(parts) == 3 and parts[2] == 'PKG-INFO':
if parts[1].endswith('.egg-info'):
prefixes.insert(0, ('/'.join(parts[:2]), 'EGG-INFO/'))
if len(parts) != 2 or not name.endswith('.pth'):
if name.endswith('-nspkg.pth'):
if parts[0].upper() in ('PURELIB', 'PLATLIB'):
contents =
if six.PY3:
contents = contents.decode()
for pth in yield_lines(contents):
pth = pth.strip().replace('\\', '/')
if not pth.startswith('import'):
prefixes.append((('%s/%s/' % (parts[0], pth)), ''))
prefixes = [(x.lower(), y) for x, y in prefixes]
return prefixes
class PthDistributions(Environment):
"""A .pth file with Distribution paths in it"""
dirty = False
def __init__(self, filename, sitedirs=()):
self.filename = filename
self.sitedirs = list(map(normalize_path, sitedirs))
self.basedir = normalize_path(os.path.dirname(self.filename))
Environment.__init__(self, [], None, None)
for path in yield_lines(self.paths):
list(map(self.add, find_distributions(path, True)))
def _load(self):
self.paths = []
saw_import = False
seen = dict.fromkeys(self.sitedirs)
if os.path.isfile(self.filename):
f = open(self.filename, 'rt')
for line in f:
if line.startswith('import'):
saw_import = True
path = line.rstrip()
if not path.strip() or path.strip().startswith('#'):
# skip non-existent paths, in case somebody deleted a package
# manually, and duplicate paths as well
path = self.paths[-1] = normalize_path(
os.path.join(self.basedir, path)
if not os.path.exists(path) or path in seen:
self.paths.pop() # skip it
self.dirty = True # we cleaned up, so we're dirty now :)
seen[path] = 1
if self.paths and not saw_import:
self.dirty = True # ensure anything we touch has import wrappers
while self.paths and not self.paths[-1].strip():
def save(self):
"""Write changed .pth file back to disk"""
if not self.dirty:
rel_paths = list(map(self.make_relative, self.paths))
if rel_paths:
log.debug("Saving %s", self.filename)
lines = self._wrap_lines(rel_paths)
data = '\n'.join(lines) + '\n'
if os.path.islink(self.filename):
with open(self.filename, 'wt') as f:
elif os.path.exists(self.filename):
log.debug("Deleting empty %s", self.filename)
self.dirty = False
def _wrap_lines(lines):
return lines
def add(self, dist):
"""Add `dist` to the distribution map"""
new_path = (
dist.location not in self.paths and (
dist.location not in self.sitedirs or
# account for '.' being in PYTHONPATH
dist.location == os.getcwd()
if new_path:
self.dirty = True
Environment.add(self, dist)
def remove(self, dist):
"""Remove `dist` from the distribution map"""
while dist.location in self.paths:
self.dirty = True
Environment.remove(self, dist)
def make_relative(self, path):
npath, last = os.path.split(normalize_path(path))
baselen = len(self.basedir)
parts = [last]
sep = os.altsep == '/' and '/' or os.sep
while len(npath) >= baselen:
if npath == self.basedir:
return sep.join(parts)
npath, last = os.path.split(npath)
return path
class RewritePthDistributions(PthDistributions):
def _wrap_lines(cls, lines):
yield cls.prelude
for line in lines:
yield line
yield cls.postlude
prelude = _one_liner("""
import sys
sys.__plen = len(sys.path)
postlude = _one_liner("""
import sys
new = sys.path[sys.__plen:]
del sys.path[sys.__plen:]
p = getattr(sys, '__egginsert', 0)
sys.path[p:p] = new
sys.__egginsert = p + len(new)
if os.environ.get('SETUPTOOLS_SYS_PATH_TECHNIQUE', 'raw') == 'rewrite':
PthDistributions = RewritePthDistributions
def _first_line_re():
Return a regular expression based on first_line_re suitable for matching
if isinstance(first_line_re.pattern, str):
return first_line_re
# first_line_re in Python >=3.1.4 and >=3.2.1 is a bytes pattern.
return re.compile(first_line_re.pattern.decode())
def auto_chmod(func, arg, exc):
if func in [os.unlink, os.remove] and == 'nt':
chmod(arg, stat.S_IWRITE)
return func(arg)
et, ev, _ = sys.exc_info()
six.reraise(et, (ev[0], ev[1] + (" %s %s" % (func, arg))))
def update_dist_caches(dist_path, fix_zipimporter_caches):
Fix any globally cached `dist_path` related data
`dist_path` should be a path of a newly installed egg distribution (zipped
or unzipped).
sys.path_importer_cache contains finder objects that have been cached when
importing data from the original distribution. Any such finders need to be
cleared since the replacement distribution might be packaged differently,
e.g. a zipped egg distribution might get replaced with an unzipped egg
folder or vice versa. Having the old finders cached may then cause Python
to attempt loading modules from the replacement distribution using an
incorrect loader.
zipimport.zipimporter objects are Python loaders charged with importing
data packaged inside zip archives. If stale loaders referencing the
original distribution, are left behind, they can fail to load modules from
the replacement distribution. E.g. if an old zipimport.zipimporter instance
is used to load data from a new zipped egg archive, it may cause the
operation to attempt to locate the requested data in the wrong location -
one indicated by the original distribution's zip archive directory
information. Such an operation may then fail outright, e.g. report having
read a 'bad local file header', or even worse, it may fail silently &
return invalid data.
zipimport._zip_directory_cache contains cached zip archive directory
information for all existing zipimport.zipimporter instances and all such
instances connected to the same archive share the same cached directory
If asked, and the underlying Python implementation allows it, we can fix
all existing zipimport.zipimporter instances instead of having to track
them down and remove them one by one, by updating their shared cached zip
archive directory information. This, of course, assumes that the
replacement distribution is packaged as a zipped egg.
If not asked to fix existing zipimport.zipimporter instances, we still do
our best to clear any remaining zipimport.zipimporter related cached data
that might somehow later get used when attempting to load data from the new
distribution and thus cause such load operations to fail. Note that when
tracking down such remaining stale data, we can not catch every conceivable
usage from here, and we clear only those that we know of and have found to
cause problems if left alive. Any remaining caches should be updated by
whomever is in charge of maintaining them, i.e. they should be ready to
handle us replacing their zip archives with new distributions at runtime.
# There are several other known sources of stale zipimport.zipimporter
# instances that we do not clear here, but might if ever given a reason to
# do so:
# * Global setuptools pkg_resources.working_set (a.k.a. 'master working
# set') may contain distributions which may in turn contain their
# zipimport.zipimporter loaders.
# * Several zipimport.zipimporter loaders held by local variables further
# up the function call stack when running the setuptools installation.
# * Already loaded modules may have their __loader__ attribute set to the
# exact loader instance used when importing them. Python 3.4 docs state
# that this information is intended mostly for introspection and so is
# not expected to cause us problems.
normalized_path = normalize_path(dist_path)
_uncache(normalized_path, sys.path_importer_cache)
if fix_zipimporter_caches:
# Here, even though we do not want to fix existing and now stale
# zipimporter cache information, we still want to remove it. Related to
# Python's zip archive directory information cache, we clear each of
# its stale entries in two phases:
# 1. Clear the entry so attempting to access zip archive information
# via any existing stale zipimport.zipimporter instances fails.
# 2. Remove the entry from the cache so any newly constructed
# zipimport.zipimporter instances do not end up using old stale
# zip archive directory information.
# This whole stale data removal step does not seem strictly necessary,
# but has been left in because it was done before we started replacing
# the zip archive directory information cache content if possible, and
# there are no relevant unit tests that we can depend on to tell us if
# this is really needed.
def _collect_zipimporter_cache_entries(normalized_path, cache):
Return zipimporter cache entry keys related to a given normalized path.
Alternative path spellings (e.g. those using different character case or
those using alternative path separators) related to the same path are
included. Any sub-path entries are included as well, i.e. those
corresponding to zip archives embedded in other zip archives.
result = []
prefix_len = len(normalized_path)
for p in cache:
np = normalize_path(p)
if (np.startswith(normalized_path) and
np[prefix_len:prefix_len + 1] in (os.sep, '')):
return result
def _update_zipimporter_cache(normalized_path, cache, updater=None):
Update zipimporter cache data for a given normalized path.
Any sub-path entries are processed as well, i.e. those corresponding to zip
archives embedded in other zip archives.
Given updater is a callable taking a cache entry key and the original entry
(after already removing the entry from the cache), and expected to update
the entry and possibly return a new one to be inserted in its place.
Returning None indicates that the entry should not be replaced with a new
one. If no updater is given, the cache entries are simply removed without
any additional processing, the same as if the updater simply returned None.
for p in _collect_zipimporter_cache_entries(normalized_path, cache):
# N.B. pypy's custom zipimport._zip_directory_cache implementation does
# not support the complete dict interface:
# * Does not support item assignment, thus not allowing this function
# to be used only for removing existing cache entries.
# * Does not support the dict.pop() method, forcing us to use the
# get/del patterns instead. For more detailed information see the
# following links:
old_entry = cache[p]
del cache[p]
new_entry = updater and updater(p, old_entry)
if new_entry is not None:
cache[p] = new_entry
def _uncache(normalized_path, cache):
_update_zipimporter_cache(normalized_path, cache)
def _remove_and_clear_zip_directory_cache_data(normalized_path):
def clear_and_remove_cached_zip_archive_directory_data(path, old_entry):
normalized_path, zipimport._zip_directory_cache,
# PyPy Python implementation does not allow directly writing to the
# zipimport._zip_directory_cache and so prevents us from attempting to correct
# its content. The best we can do there is clear the problematic cache content
# and have PyPy repopulate it as needed. The downside is that if there are any
# stale zipimport.zipimporter instances laying around, attempting to use them
# will fail due to not having its zip archive directory information available
# instead of being automatically corrected to use the new correct zip archive
# directory information.
if '__pypy__' in sys.builtin_module_names:
_replace_zip_directory_cache_data = \
def _replace_zip_directory_cache_data(normalized_path):
def replace_cached_zip_archive_directory_data(path, old_entry):
# N.B. In theory, we could load the zip directory information just
# once for all updated path spellings, and then copy it locally and
# update its contained path strings to contain the correct
# spelling, but that seems like a way too invasive move (this cache
# structure is not officially documented anywhere and could in
# theory change with new Python releases) for no significant
# benefit.
return old_entry
normalized_path, zipimport._zip_directory_cache,
def is_python(text, filename='<string>'):
"Is this string a valid Python script?"
compile(text, filename, 'exec')
except (SyntaxError, TypeError):
return False
return True
def is_sh(executable):
"""Determine if the specified executable is a .sh (contains a #! line)"""
with, encoding='latin-1') as fp:
magic =
except (OSError, IOError):
return executable
return magic == '#!'
def nt_quote_arg(arg):
"""Quote a command line argument according to Windows parsing rules"""
return subprocess.list2cmdline([arg])
def is_python_script(script_text, filename):
"""Is this text, as a whole, a Python script? (as opposed to shell/bat/etc.
if filename.endswith('.py') or filename.endswith('.pyw'):
return True # extension says it's Python
if is_python(script_text, filename):
return True # it's syntactically valid Python
if script_text.startswith('#!'):
# It begins with a '#!' line, so check if 'python' is in it somewhere
return 'python' in script_text.splitlines()[0].lower()
return False # Not any Python I can recognize
from os import chmod as _chmod
except ImportError:
# Jython compatibility
def _chmod(*args):
def chmod(path, mode):
log.debug("changing mode of %s to %o", path, mode)
_chmod(path, mode)
except os.error as e:
log.debug("chmod failed: %s", e)
class CommandSpec(list):
A command spec for a #! header, specified as a list of arguments akin to
those passed to Popen.
options = []
split_args = dict()
def best(cls):
Choose the best CommandSpec class based on environmental conditions.
return cls
def _sys_executable(cls):
_default = os.path.normpath(sys.executable)
return os.environ.get('__PYVENV_LAUNCHER__', _default)
def from_param(cls, param):
Construct a CommandSpec from a parameter to build_scripts, which may
be None.
if isinstance(param, cls):
return param
if isinstance(param, list):
return cls(param)
if param is None:
return cls.from_environment()
# otherwise, assume it's a string.
return cls.from_string(param)
def from_environment(cls):
return cls([cls._sys_executable()])
def from_string(cls, string):
Construct a command spec from a simple string representing a command
line parseable by shlex.split.
items = shlex.split(string, **cls.split_args)
return cls(items)
def install_options(self, script_text):
self.options = shlex.split(self._extract_options(script_text))
cmdline = subprocess.list2cmdline(self)
if not isascii(cmdline):
self.options[:0] = ['-x']
def _extract_options(orig_script):
Extract any options from the first line of the script.
first = (orig_script + '\n').splitlines()[0]
match = _first_line_re().match(first)
options = or '' if match else ''
return options.strip()
def as_header(self):
return self._render(self + list(self.options))
def _strip_quotes(item):
_QUOTES = '"\''
for q in _QUOTES:
if item.startswith(q) and item.endswith(q):
return item[1:-1]
return item
def _render(items):
cmdline = subprocess.list2cmdline(
CommandSpec._strip_quotes(item.strip()) for item in items)
return '#!' + cmdline + '\n'
# For pbr compat; will be removed in a future version.
sys_executable = CommandSpec._sys_executable()
class WindowsCommandSpec(CommandSpec):
split_args = dict(posix=False)
class ScriptWriter(object):
Encapsulates behavior around writing entry point scripts for console and
gui apps.
template = textwrap.dedent(r"""
# EASY-INSTALL-ENTRY-SCRIPT: %(spec)r,%(group)r,%(name)r
__requires__ = %(spec)r
import re
import sys
from pkg_resources import load_entry_point
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
load_entry_point(%(spec)r, %(group)r, %(name)r)()
command_spec_class = CommandSpec
def get_script_args(cls, dist, executable=None, wininst=False):
# for backward compatibility
warnings.warn("Use get_args", DeprecationWarning)
writer = (WindowsScriptWriter if wininst else ScriptWriter).best()
header = cls.get_script_header("", executable, wininst)
return writer.get_args(dist, header)
def get_script_header(cls, script_text, executable=None, wininst=False):
# for backward compatibility
warnings.warn("Use get_header", DeprecationWarning)
if wininst:
executable = "python.exe"
cmd =
return cmd.as_header()
def get_args(cls, dist, header=None):
Yield write_script() argument tuples for a distribution's
console_scripts and gui_scripts entry points.
if header is None:
header = cls.get_header()
spec = str(dist.as_requirement())
for type_ in 'console', 'gui':
group = type_ + '_scripts'
for name, ep in dist.get_entry_map(group).items():
script_text = cls.template % locals()
args = cls._get_script_args(type_, name, header, script_text)
for res in args:
yield res
def _ensure_safe_name(name):
Prevent paths in *_scripts entry point names.
has_path_sep ='[\\/]', name)
if has_path_sep:
raise ValueError("Path separators not allowed in script names")
def get_writer(cls, force_windows):
# for backward compatibility
warnings.warn("Use best", DeprecationWarning)
return if force_windows else
def best(cls):
Select the best ScriptWriter for this environment.
if sys.platform == 'win32' or ( == 'java' and os._name == 'nt'):
return cls
def _get_script_args(cls, type_, name, header, script_text):
# Simply write the stub with no extension.
yield (name, header + script_text)
def get_header(cls, script_text="", executable=None):
"""Create a #! line, getting options (if any) from script_text"""
cmd =
return cmd.as_header()
class WindowsScriptWriter(ScriptWriter):
command_spec_class = WindowsCommandSpec
def get_writer(cls):
# for backward compatibility
warnings.warn("Use best", DeprecationWarning)
def best(cls):
Select the best ScriptWriter suitable for Windows
writer_lookup = dict(
# for compatibility, use the executable launcher by default
launcher = os.environ.get('SETUPTOOLS_LAUNCHER', 'executable')
return writer_lookup[launcher]
def _get_script_args(cls, type_, name, header, script_text):
"For Windows, add a .py extension"
ext = dict(console='.pya', gui='.pyw')[type_]
if ext not in os.environ['PATHEXT'].lower().split(';'):
msg = (
"{ext} not listed in PATHEXT; scripts will not be "
"recognized as executables."
warnings.warn(msg, UserWarning)
old = ['.pya', '.py', '', '.pyc', '.pyo', '.pyw', '.exe']
header = cls._adjust_header(type_, header)
blockers = [name + x for x in old]
yield name + ext, header + script_text, 't', blockers
def _adjust_header(cls, type_, orig_header):
Make sure 'pythonw' is used for gui and and 'python' is used for
console (regardless of what sys.executable is).
pattern = 'pythonw.exe'
repl = 'python.exe'
if type_ == 'gui':
pattern, repl = repl, pattern
pattern_ob = re.compile(re.escape(pattern), re.IGNORECASE)
new_header = pattern_ob.sub(string=orig_header, repl=repl)
return new_header if cls._use_header(new_header) else orig_header
def _use_header(new_header):
Should _adjust_header use the replaced header?
On non-windows systems, always use. On
Windows systems, only use the replaced header if it resolves
to an executable on the system.
clean_header = new_header[2:-1].strip('"')
return sys.platform != 'win32' or find_executable(clean_header)
class WindowsExecutableLauncherWriter(WindowsScriptWriter):
def _get_script_args(cls, type_, name, header, script_text):
For Windows, add a .py extension and an .exe launcher
if type_ == 'gui':
launcher_type = 'gui'
ext = '-script.pyw'
old = ['.pyw']
launcher_type = 'cli'
ext = ''
old = ['.py', '.pyc', '.pyo']
hdr = cls._adjust_header(type_, header)
blockers = [name + x for x in old]
yield (name + ext, hdr + script_text, 't', blockers)
yield (
name + '.exe', get_win_launcher(launcher_type),
'b' # write in binary mode
if not is_64bit():
# install a manifest for the launcher to prevent Windows
# from detecting it as an installer (which it will for
# launchers like easy_install.exe). Consider only
# adding a manifest for launchers detected as installers.
# See Distribute #143 for details.
m_name = name + '.exe.manifest'
yield (m_name, load_launcher_manifest(name), 't')
# for backward-compatibility
get_script_args = ScriptWriter.get_script_args
get_script_header = ScriptWriter.get_script_header
def get_win_launcher(type):
Load the Windows launcher (executable) suitable for launching a script.
`type` should be either 'cli' or 'gui'
Returns the executable as a byte string.
launcher_fn = '%s.exe' % type
if is_64bit():
launcher_fn = launcher_fn.replace(".", "-64.")
launcher_fn = launcher_fn.replace(".", "-32.")
return resource_string('setuptools', launcher_fn)
def load_launcher_manifest(name):
manifest = pkg_resources.resource_string(__name__, 'launcher manifest.xml')
if six.PY2:
return manifest % vars()
return manifest.decode('utf-8') % vars()
def rmtree(path, ignore_errors=False, onerror=auto_chmod):
return shutil.rmtree(path, ignore_errors, onerror)
def current_umask():
tmp = os.umask(0o022)
return tmp
def bootstrap():
# This function is called when setuptools*.egg is run using /bin/sh
import setuptools
argv0 = os.path.dirname(setuptools.__path__[0])
sys.argv[0] = argv0
def main(argv=None, **kw):
from setuptools import setup
from setuptools.dist import Distribution
class DistributionWithoutHelpCommands(Distribution):
common_usage = ""
def _show_help(self, *args, **kw):
with _patch_usage():
Distribution._show_help(self, *args, **kw)
if argv is None:
argv = sys.argv[1:]
with _patch_usage():
script_args=['-q', 'easy_install', '-v'] + argv,
script_name=sys.argv[0] or 'easy_install',
def _patch_usage():
import distutils.core
USAGE = textwrap.dedent("""
usage: %(script)s [options] requirement_or_url ...
or: %(script)s --help
def gen_usage(script_name):
return USAGE % dict(
saved = distutils.core.gen_usage
distutils.core.gen_usage = gen_usage
distutils.core.gen_usage = saved
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