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# The following comment should be removed at some point in the future.
# mypy: strict-optional=False
# mypy: disallow-untyped-defs=False
from __future__ import absolute_import
import contextlib
import errno
import getpass
import io
import logging
import os
import posixpath
import shutil
import stat
import sys
from collections import deque
from pip._vendor import pkg_resources
# NOTE: retrying is not annotated in typeshed as on 2017-07-17, which is
# why we ignore the type on this import.
from pip._vendor.retrying import retry # type: ignore
from pip._vendor.six import PY2, text_type
from pip._vendor.six.moves import input
from pip._vendor.six.moves.urllib import parse as urllib_parse
from pip._vendor.six.moves.urllib.parse import unquote as urllib_unquote
from pip import __version__
from pip._internal.exceptions import CommandError
from pip._internal.locations import (
distutils_scheme,
get_major_minor_version,
site_packages,
user_site,
)
from pip._internal.utils.compat import (
WINDOWS,
expanduser,
stdlib_pkgs,
str_to_display,
)
from pip._internal.utils.marker_files import write_delete_marker_file
from pip._internal.utils.typing import MYPY_CHECK_RUNNING
from pip._internal.utils.virtualenv import (
running_under_virtualenv,
virtualenv_no_global,
)
if PY2:
from io import BytesIO as StringIO
else:
from io import StringIO
if MYPY_CHECK_RUNNING:
from typing import (
Any, AnyStr, Container, Iterable, List, Optional, Text,
Tuple, Union, cast,
)
from pip._vendor.pkg_resources import Distribution
VersionInfo = Tuple[int, int, int]
else:
# typing's cast() is needed at runtime, but we don't want to import typing.
# Thus, we use a dummy no-op version, which we tell mypy to ignore.
def cast(type_, value): # type: ignore
return value
__all__ = ['rmtree', 'display_path', 'backup_dir',
'ask', 'splitext',
'format_size', 'is_installable_dir',
'normalize_path',
'renames', 'get_prog',
'captured_stdout', 'ensure_dir',
'get_installed_version', 'remove_auth_from_url']
logger = logging.getLogger(__name__)
def get_pip_version():
# type: () -> str
pip_pkg_dir = os.path.join(os.path.dirname(__file__), "..", "..")
pip_pkg_dir = os.path.abspath(pip_pkg_dir)
return (
'pip {} from {} (python {})'.format(
__version__, pip_pkg_dir, get_major_minor_version(),
)
)
def normalize_version_info(py_version_info):
# type: (Tuple[int, ...]) -> Tuple[int, int, int]
"""
Convert a tuple of ints representing a Python version to one of length
three.
:param py_version_info: a tuple of ints representing a Python version,
or None to specify no version. The tuple can have any length.
:return: a tuple of length three if `py_version_info` is non-None.
Otherwise, return `py_version_info` unchanged (i.e. None).
"""
if len(py_version_info) < 3:
py_version_info += (3 - len(py_version_info)) * (0,)
elif len(py_version_info) > 3:
py_version_info = py_version_info[:3]
return cast('VersionInfo', py_version_info)
def ensure_dir(path):
# type: (AnyStr) -> None
"""os.path.makedirs without EEXIST."""
try:
os.makedirs(path)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def get_prog():
# type: () -> str
try:
prog = os.path.basename(sys.argv[0])
if prog in ('__main__.py', '-c'):
return "%s -m pip" % sys.executable
else:
return prog
except (AttributeError, TypeError, IndexError):
pass
return 'pip'
# Retry every half second for up to 3 seconds
@retry(stop_max_delay=3000, wait_fixed=500)
def rmtree(dir, ignore_errors=False):
# type: (str, bool) -> None
shutil.rmtree(dir, ignore_errors=ignore_errors,
onerror=rmtree_errorhandler)
def rmtree_errorhandler(func, path, exc_info):
"""On Windows, the files in .svn are read-only, so when rmtree() tries to
remove them, an exception is thrown. We catch that here, remove the
read-only attribute, and hopefully continue without problems."""
try:
has_attr_readonly = not (os.stat(path).st_mode & stat.S_IWRITE)
except (IOError, OSError):
# it's equivalent to os.path.exists
return
if has_attr_readonly:
# convert to read/write
os.chmod(path, stat.S_IWRITE)
# use the original function to repeat the operation
func(path)
return
else:
raise
def path_to_display(path):
# type: (Optional[Union[str, Text]]) -> Optional[Text]
"""
Convert a bytes (or text) path to text (unicode in Python 2) for display
and logging purposes.
This function should never error out. Also, this function is mainly needed
for Python 2 since in Python 3 str paths are already text.
"""
if path is None:
return None
if isinstance(path, text_type):
return path
# Otherwise, path is a bytes object (str in Python 2).
try:
display_path = path.decode(sys.getfilesystemencoding(), 'strict')
except UnicodeDecodeError:
# Include the full bytes to make troubleshooting easier, even though
# it may not be very human readable.
if PY2:
# Convert the bytes to a readable str representation using
# repr(), and then convert the str to unicode.
# Also, we add the prefix "b" to the repr() return value both
# to make the Python 2 output look like the Python 3 output, and
# to signal to the user that this is a bytes representation.
display_path = str_to_display('b{!r}'.format(path))
else:
# Silence the "F821 undefined name 'ascii'" flake8 error since
# in Python 3 ascii() is a built-in.
display_path = ascii(path) # noqa: F821
return display_path
def display_path(path):
# type: (Union[str, Text]) -> str
"""Gives the display value for a given path, making it relative to cwd
if possible."""
path = os.path.normcase(os.path.abspath(path))
if sys.version_info[0] == 2:
path = path.decode(sys.getfilesystemencoding(), 'replace')
path = path.encode(sys.getdefaultencoding(), 'replace')
if path.startswith(os.getcwd() + os.path.sep):
path = '.' + path[len(os.getcwd()):]
return path
def backup_dir(dir, ext='.bak'):
# type: (str, str) -> str
"""Figure out the name of a directory to back up the given dir to
(adding .bak, .bak2, etc)"""
n = 1
extension = ext
while os.path.exists(dir + extension):
n += 1
extension = ext + str(n)
return dir + extension
def ask_path_exists(message, options):
# type: (str, Iterable[str]) -> str
for action in os.environ.get('PIP_EXISTS_ACTION', '').split():
if action in options:
return action
return ask(message, options)
def _check_no_input(message):
# type: (str) -> None
"""Raise an error if no input is allowed."""
if os.environ.get('PIP_NO_INPUT'):
raise Exception(
'No input was expected ($PIP_NO_INPUT set); question: %s' %
message
)
def ask(message, options):
# type: (str, Iterable[str]) -> str
"""Ask the message interactively, with the given possible responses"""
while 1:
_check_no_input(message)
response = input(message)
response = response.strip().lower()
if response not in options:
print(
'Your response (%r) was not one of the expected responses: '
'%s' % (response, ', '.join(options))
)
else:
return response
def ask_input(message):
# type: (str) -> str
"""Ask for input interactively."""
_check_no_input(message)
return input(message)
def ask_password(message):
# type: (str) -> str
"""Ask for a password interactively."""
_check_no_input(message)
return getpass.getpass(message)
def format_size(bytes):
# type: (float) -> str
if bytes > 1000 * 1000:
return '%.1fMB' % (bytes / 1000.0 / 1000)
elif bytes > 10 * 1000:
return '%ikB' % (bytes / 1000)
elif bytes > 1000:
return '%.1fkB' % (bytes / 1000.0)
else:
return '%ibytes' % bytes
def is_installable_dir(path):
# type: (str) -> bool
"""Is path is a directory containing setup.py or pyproject.toml?
"""
if not os.path.isdir(path):
return False
setup_py = os.path.join(path, 'setup.py')
if os.path.isfile(setup_py):
return True
pyproject_toml = os.path.join(path, 'pyproject.toml')
if os.path.isfile(pyproject_toml):
return True
return False
def read_chunks(file, size=io.DEFAULT_BUFFER_SIZE):
"""Yield pieces of data from a file-like object until EOF."""
while True:
chunk = file.read(size)
if not chunk:
break
yield chunk
def normalize_path(path, resolve_symlinks=True):
# type: (str, bool) -> str
"""
Convert a path to its canonical, case-normalized, absolute version.
"""
path = expanduser(path)
if resolve_symlinks:
path = os.path.realpath(path)
else:
path = os.path.abspath(path)
return os.path.normcase(path)
def splitext(path):
# type: (str) -> Tuple[str, str]
"""Like os.path.splitext, but take off .tar too"""
base, ext = posixpath.splitext(path)
if base.lower().endswith('.tar'):
ext = base[-4:] + ext
base = base[:-4]
return base, ext
def renames(old, new):
# type: (str, str) -> None
"""Like os.renames(), but handles renaming across devices."""
# Implementation borrowed from os.renames().
head, tail = os.path.split(new)
if head and tail and not os.path.exists(head):
os.makedirs(head)
shutil.move(old, new)
head, tail = os.path.split(old)
if head and tail:
try:
os.removedirs(head)
except OSError:
pass
def is_local(path):
# type: (str) -> bool
"""
Return True if path is within sys.prefix, if we're running in a virtualenv.
If we're not in a virtualenv, all paths are considered "local."
Caution: this function assumes the head of path has been normalized
with normalize_path.
"""
if not running_under_virtualenv():
return True
return path.startswith(normalize_path(sys.prefix))
def dist_is_local(dist):
# type: (Distribution) -> bool
"""
Return True if given Distribution object is installed locally
(i.e. within current virtualenv).
Always True if we're not in a virtualenv.
"""
return is_local(dist_location(dist))
def dist_in_usersite(dist):
# type: (Distribution) -> bool
"""
Return True if given Distribution is installed in user site.
"""
return dist_location(dist).startswith(normalize_path(user_site))
def dist_in_site_packages(dist):
# type: (Distribution) -> bool
"""
Return True if given Distribution is installed in
sysconfig.get_python_lib().
"""
return dist_location(dist).startswith(normalize_path(site_packages))
def dist_in_install_path(dist):
"""
Return True if given Distribution is installed in
path matching distutils_scheme layout.
"""
norm_path = normalize_path(dist_location(dist))
return norm_path.startswith(normalize_path(
distutils_scheme("")['purelib'].split('python')[0]))
def dist_is_editable(dist):
# type: (Distribution) -> bool
"""
Return True if given Distribution is an editable install.
"""
for path_item in sys.path:
egg_link = os.path.join(path_item, dist.project_name + '.egg-link')
if os.path.isfile(egg_link):
return True
return False
def get_installed_distributions(
local_only=True, # type: bool
skip=stdlib_pkgs, # type: Container[str]
include_editables=True, # type: bool
editables_only=False, # type: bool
user_only=False, # type: bool
paths=None # type: Optional[List[str]]
):
# type: (...) -> List[Distribution]
"""
Return a list of installed Distribution objects.
If ``local_only`` is True (default), only return installations
local to the current virtualenv, if in a virtualenv.
``skip`` argument is an iterable of lower-case project names to
ignore; defaults to stdlib_pkgs
If ``include_editables`` is False, don't report editables.
If ``editables_only`` is True , only report editables.
If ``user_only`` is True , only report installations in the user
site directory.
If ``paths`` is set, only report the distributions present at the
specified list of locations.
"""
if paths:
working_set = pkg_resources.WorkingSet(paths)
else:
working_set = pkg_resources.working_set
if local_only:
local_test = dist_is_local
else:
def local_test(d):
return True
if include_editables:
def editable_test(d):
return True
else:
def editable_test(d):
return not dist_is_editable(d)
if editables_only:
def editables_only_test(d):
return dist_is_editable(d)
else:
def editables_only_test(d):
return True
if user_only:
user_test = dist_in_usersite
else:
def user_test(d):
return True
# because of pkg_resources vendoring, mypy cannot find stub in typeshed
return [d for d in working_set # type: ignore
if local_test(d) and
d.key not in skip and
editable_test(d) and
editables_only_test(d) and
user_test(d)
]
def egg_link_path(dist):
# type: (Distribution) -> Optional[str]
"""
Return the path for the .egg-link file if it exists, otherwise, None.
There's 3 scenarios:
1) not in a virtualenv
try to find in site.USER_SITE, then site_packages
2) in a no-global virtualenv
try to find in site_packages
3) in a yes-global virtualenv
try to find in site_packages, then site.USER_SITE
(don't look in global location)
For #1 and #3, there could be odd cases, where there's an egg-link in 2
locations.
This method will just return the first one found.
"""
sites = []
if running_under_virtualenv():
sites.append(site_packages)
if not virtualenv_no_global() and user_site:
sites.append(user_site)
else:
if user_site:
sites.append(user_site)
sites.append(site_packages)
for site in sites:
egglink = os.path.join(site, dist.project_name) + '.egg-link'
if os.path.isfile(egglink):
return egglink
return None
def dist_location(dist):
# type: (Distribution) -> str
"""
Get the site-packages location of this distribution. Generally
this is dist.location, except in the case of develop-installed
packages, where dist.location is the source code location, and we
want to know where the egg-link file is.
The returned location is normalized (in particular, with symlinks removed).
"""
egg_link = egg_link_path(dist)
if egg_link:
return normalize_path(egg_link)
return normalize_path(dist.location)
def write_output(msg, *args):
# type: (str, str) -> None
logger.info(msg, *args)
def _make_build_dir(build_dir):
os.makedirs(build_dir)
write_delete_marker_file(build_dir)
class FakeFile(object):
"""Wrap a list of lines in an object with readline() to make
ConfigParser happy."""
def __init__(self, lines):
self._gen = (l for l in lines)
def readline(self):
try:
try:
return next(self._gen)
except NameError:
return self._gen.next()
except StopIteration:
return ''
def __iter__(self):
return self._gen
class StreamWrapper(StringIO):
@classmethod
def from_stream(cls, orig_stream):
cls.orig_stream = orig_stream
return cls()
# compileall.compile_dir() needs stdout.encoding to print to stdout
@property
def encoding(self):
return self.orig_stream.encoding
@contextlib.contextmanager
def captured_output(stream_name):
"""Return a context manager used by captured_stdout/stdin/stderr
that temporarily replaces the sys stream *stream_name* with a StringIO.
Taken from Lib/support/__init__.py in the CPython repo.
"""
orig_stdout = getattr(sys, stream_name)
setattr(sys, stream_name, StreamWrapper.from_stream(orig_stdout))
try:
yield getattr(sys, stream_name)
finally:
setattr(sys, stream_name, orig_stdout)
def captured_stdout():
"""Capture the output of sys.stdout:
with captured_stdout() as stdout:
print('hello')
self.assertEqual(stdout.getvalue(), 'hello\n')
Taken from Lib/support/__init__.py in the CPython repo.
"""
return captured_output('stdout')
def captured_stderr():
"""
See captured_stdout().
"""
return captured_output('stderr')
class cached_property(object):
"""A property that is only computed once per instance and then replaces
itself with an ordinary attribute. Deleting the attribute resets the
property.
Source: https://github.com/bottlepy/bottle/blob/0.11.5/bottle.py#L175
"""
def __init__(self, func):
self.__doc__ = getattr(func, '__doc__')
self.func = func
def __get__(self, obj, cls):
if obj is None:
# We're being accessed from the class itself, not from an object
return self
value = obj.__dict__[self.func.__name__] = self.func(obj)
return value
def get_installed_version(dist_name, working_set=None):
"""Get the installed version of dist_name avoiding pkg_resources cache"""
# Create a requirement that we'll look for inside of setuptools.
req = pkg_resources.Requirement.parse(dist_name)
if working_set is None:
# We want to avoid having this cached, so we need to construct a new
# working set each time.
working_set = pkg_resources.WorkingSet()
# Get the installed distribution from our working set
dist = working_set.find(req)
# Check to see if we got an installed distribution or not, if we did
# we want to return it's version.
return dist.version if dist else None
def consume(iterator):
"""Consume an iterable at C speed."""
deque(iterator, maxlen=0)
# Simulates an enum
def enum(*sequential, **named):
enums = dict(zip(sequential, range(len(sequential))), **named)
reverse = {value: key for key, value in enums.items()}
enums['reverse_mapping'] = reverse
return type('Enum', (), enums)
def build_netloc(host, port):
# type: (str, Optional[int]) -> str
"""
Build a netloc from a host-port pair
"""
if port is None:
return host
if ':' in host:
# Only wrap host with square brackets when it is IPv6
host = '[{}]'.format(host)
return '{}:{}'.format(host, port)
def build_url_from_netloc(netloc, scheme='https'):
# type: (str, str) -> str
"""
Build a full URL from a netloc.
"""
if netloc.count(':') >= 2 and '@' not in netloc and '[' not in netloc:
# It must be a bare IPv6 address, so wrap it with brackets.
netloc = '[{}]'.format(netloc)
return '{}://{}'.format(scheme, netloc)
def parse_netloc(netloc):
# type: (str) -> Tuple[str, Optional[int]]
"""
Return the host-port pair from a netloc.
"""
url = build_url_from_netloc(netloc)
parsed = urllib_parse.urlparse(url)
return parsed.hostname, parsed.port
def split_auth_from_netloc(netloc):
"""
Parse out and remove the auth information from a netloc.
Returns: (netloc, (username, password)).
"""
if '@' not in netloc:
return netloc, (None, None)
# Split from the right because that's how urllib.parse.urlsplit()
# behaves if more than one @ is present (which can be checked using
# the password attribute of urlsplit()'s return value).
auth, netloc = netloc.rsplit('@', 1)
if ':' in auth:
# Split from the left because that's how urllib.parse.urlsplit()
# behaves if more than one : is present (which again can be checked
# using the password attribute of the return value)
user_pass = auth.split(':', 1)
else:
user_pass = auth, None
user_pass = tuple(
None if x is None else urllib_unquote(x) for x in user_pass
)
return netloc, user_pass
def redact_netloc(netloc):
# type: (str) -> str
"""
Replace the sensitive data in a netloc with "****", if it exists.
For example:
- "user:pass@example.com" returns "user:****@example.com"
- "accesstoken@example.com" returns "****@example.com"
"""
netloc, (user, password) = split_auth_from_netloc(netloc)
if user is None:
return netloc
if password is None:
user = '****'
password = ''
else:
user = urllib_parse.quote(user)
password = ':****'
return '{user}{password}@{netloc}'.format(user=user,
password=password,
netloc=netloc)
def _transform_url(url, transform_netloc):
"""Transform and replace netloc in a url.
transform_netloc is a function taking the netloc and returning a
tuple. The first element of this tuple is the new netloc. The
entire tuple is returned.
Returns a tuple containing the transformed url as item 0 and the
original tuple returned by transform_netloc as item 1.
"""
purl = urllib_parse.urlsplit(url)
netloc_tuple = transform_netloc(purl.netloc)
# stripped url
url_pieces = (
purl.scheme, netloc_tuple[0], purl.path, purl.query, purl.fragment
)
surl = urllib_parse.urlunsplit(url_pieces)
return surl, netloc_tuple
def _get_netloc(netloc):
return split_auth_from_netloc(netloc)
def _redact_netloc(netloc):
return (redact_netloc(netloc),)
def split_auth_netloc_from_url(url):
# type: (str) -> Tuple[str, str, Tuple[str, str]]
"""
Parse a url into separate netloc, auth, and url with no auth.
Returns: (url_without_auth, netloc, (username, password))
"""
url_without_auth, (netloc, auth) = _transform_url(url, _get_netloc)
return url_without_auth, netloc, auth
def remove_auth_from_url(url):
# type: (str) -> str
"""Return a copy of url with 'username:password@' removed."""
# username/pass params are passed to subversion through flags
# and are not recognized in the url.
return _transform_url(url, _get_netloc)[0]
def redact_auth_from_url(url):
# type: (str) -> str
"""Replace the password in a given url with ****."""
return _transform_url(url, _redact_netloc)[0]
class HiddenText(object):
def __init__(
self,
secret, # type: str
redacted, # type: str
):
# type: (...) -> None
self.secret = secret
self.redacted = redacted
def __repr__(self):
# type: (...) -> str
return '<HiddenText {!r}>'.format(str(self))
def __str__(self):
# type: (...) -> str
return self.redacted
# This is useful for testing.
def __eq__(self, other):
# type: (Any) -> bool
if type(self) != type(other):
return False
# The string being used for redaction doesn't also have to match,
# just the raw, original string.
return (self.secret == other.secret)
# We need to provide an explicit __ne__ implementation for Python 2.
# TODO: remove this when we drop PY2 support.
def __ne__(self, other):
# type: (Any) -> bool
return not self == other
def hide_value(value):
# type: (str) -> HiddenText
return HiddenText(value, redacted='****')
def hide_url(url):
# type: (str) -> HiddenText
redacted = redact_auth_from_url(url)
return HiddenText(url, redacted=redacted)
def protect_pip_from_modification_on_windows(modifying_pip):
# type: (bool) -> None
"""Protection of pip.exe from modification on Windows
On Windows, any operation modifying pip should be run as:
python -m pip ...
"""
pip_names = set()
for ext in ('', '.exe'):
pip_names.add('pip{ext}'.format(ext=ext))
pip_names.add('pip{}{ext}'.format(sys.version_info[0], ext=ext))
pip_names.add('pip{}.{}{ext}'.format(*sys.version_info[:2], ext=ext))
# See https://github.com/pypa/pip/issues/1299 for more discussion
should_show_use_python_msg = (
modifying_pip and
WINDOWS and
os.path.basename(sys.argv[0]) in pip_names
)
if should_show_use_python_msg:
new_command = [
sys.executable, "-m", "pip"
] + sys.argv[1:]
raise CommandError(
'To modify pip, please run the following command:\n{}'
.format(" ".join(new_command))
)
def is_console_interactive():
# type: () -> bool
"""Is this console interactive?
"""
return sys.stdin is not None and sys.stdin.isatty()