#!/usr/bin/env python
#
# Hi There!
#
# You may be wondering what this giant blob of binary data here is, you might
# even be worried that we're up to something nefarious (good for you for being
# paranoid!). This is a base85 encoding of a zip file, this zip file contains
# an entire copy of pip (version 23.3.1).
#
# Pip is a thing that installs packages, pip itself is a package that someone
# might want to install, especially if they're looking to run this get-pip.py
# script. Pip has a lot of code to deal with the security of installing
# packages, various edge cases on various platforms, and other such sort of
# "tribal knowledge" that has been encoded in its code base. Because of this
# we basically include an entire copy of pip inside this blob. We do this
# because the alternatives are attempt to implement a "minipip" that probably
# doesn't do things correctly and has weird edge cases, or compress pip itself
# down into a single file.
#
# If you're wondering how this is created, it is generated using
# `scripts/generate.py` in https://github.com/pypa/get-pip.
import sys
this_python = sys.version_info[:2]
min_version = (3, 7)
if this_python < min_version:
message_parts = [
"This script does not work on Python {}.{}".format(*this_python),
"The minimum supported Python version is {}.{}.".format(*min_version),
"Please use https://bootstrap.pypa.io/pip/{}.{}/get-pip.py instead.".format(*this_python),
]
print("ERROR: " + " ".join(message_parts))
sys.exit(1)
import os.path
import pkgutil
import shutil
import tempfile
import argparse
import importlib
from base64 import b85decode
def include_setuptools(args):
"""
Install setuptools only if absent and not excluded.
"""
cli = not args.no_setuptools
env = not os.environ.get("PIP_NO_SETUPTOOLS")
absent = not importlib.util.find_spec("setuptools")
return cli and env and absent
def include_wheel(args):
"""
Install wheel only if absent and not excluded.
"""
cli = not args.no_wheel
env = not os.environ.get("PIP_NO_WHEEL")
absent = not importlib.util.find_spec("wheel")
return cli and env and absent
def determine_pip_install_arguments():
pre_parser = argparse.ArgumentParser()
pre_parser.add_argument("--no-setuptools", action="store_true")
pre_parser.add_argument("--no-wheel", action="store_true")
pre, args = pre_parser.parse_known_args()
args.append("pip")
if include_setuptools(pre):
args.append("setuptools")
if include_wheel(pre):
args.append("wheel")
return ["install", "--upgrade", "--force-reinstall"] + args
def monkeypatch_for_cert(tmpdir):
"""Patches `pip install` to provide default certificate with the lowest priority.
This ensures that the bundled certificates are used unless the user specifies a
custom cert via any of pip's option passing mechanisms (config, env-var, CLI).
A monkeypatch is the easiest way to achieve this, without messing too much with
the rest of pip's internals.
"""
from pip._internal.commands.install import InstallCommand
# We want to be using the internal certificates.
cert_path = os.path.join(tmpdir, "cacert.pem")
with open(cert_path, "wb") as cert:
cert.write(pkgutil.get_data("pip._vendor.certifi", "cacert.pem"))
install_parse_args = InstallCommand.parse_args
def cert_parse_args(self, args):
if not self.parser.get_default_values().cert:
# There are no user provided cert -- force use of bundled cert
self.parser.defaults["cert"] = cert_path # calculated above
return install_parse_args(self, args)
InstallCommand.parse_args = cert_parse_args
def bootstrap(tmpdir):
monkeypatch_for_cert(tmpdir)
# Execute the included pip and use it to install the latest pip and
# setuptools from PyPI
from pip._internal.cli.main import main as pip_entry_point
args = determine_pip_install_arguments()
sys.exit(pip_entry_point(args))
def main():
tmpdir = None
try:
# Create a temporary working directory
tmpdir = tempfile.mkdtemp()
# Unpack the zipfile into the temporary directory
pip_zip = os.path.join(tmpdir, "pip.zip")
with open(pip_zip, "wb") as fp:
fp.write(b85decode(DATA.replace(b"\n", b"")))
# Add the zipfile to sys.path so that we can import it
sys.path.insert(0, pip_zip)
# Run the bootstrap
bootstrap(tmpdir=tmpdir)
finally:
# Clean up our temporary working directory
if tmpdir:
shutil.rmtree(tmpdir, ignore_errors=True)
DATA = b"""
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