210 lines
6.3 KiB
Python
210 lines
6.3 KiB
Python
import os
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import os.path
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import pkgutil
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import sys
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import tempfile
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__all__ = ["version", "bootstrap"]
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_SETUPTOOLS_VERSION = "18.2"
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_PIP_VERSION = "7.1.2"
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# pip currently requires ssl support, so we try to provide a nicer
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# error message when that is missing (http://bugs.python.org/issue19744)
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_MISSING_SSL_MESSAGE = ("pip {} requires SSL/TLS".format(_PIP_VERSION))
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try:
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import ssl
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except ImportError:
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ssl = None
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def _require_ssl_for_pip():
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raise RuntimeError(_MISSING_SSL_MESSAGE)
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else:
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def _require_ssl_for_pip():
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pass
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_PROJECTS = [
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("setuptools", _SETUPTOOLS_VERSION),
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("pip", _PIP_VERSION),
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]
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def _run_pip(args, additional_paths=None):
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# Add our bundled software to the sys.path so we can import it
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if additional_paths is not None:
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sys.path = additional_paths + sys.path
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# Install the bundled software
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import pip
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pip.main(args)
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def version():
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"""
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Returns a string specifying the bundled version of pip.
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"""
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return _PIP_VERSION
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def _disable_pip_configuration_settings():
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# We deliberately ignore all pip environment variables
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# when invoking pip
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# See http://bugs.python.org/issue19734 for details
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keys_to_remove = [k for k in os.environ if k.startswith("PIP_")]
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for k in keys_to_remove:
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del os.environ[k]
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# We also ignore the settings in the default pip configuration file
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# See http://bugs.python.org/issue20053 for details
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os.environ['PIP_CONFIG_FILE'] = os.devnull
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def bootstrap(*, root=None, upgrade=False, user=False,
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altinstall=False, default_pip=False,
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verbosity=0):
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"""
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Bootstrap pip into the current Python installation (or the given root
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directory).
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Note that calling this function will alter both sys.path and os.environ.
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"""
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if altinstall and default_pip:
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raise ValueError("Cannot use altinstall and default_pip together")
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_require_ssl_for_pip()
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_disable_pip_configuration_settings()
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# By default, installing pip and setuptools installs all of the
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# following scripts (X.Y == running Python version):
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#
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# pip, pipX, pipX.Y, easy_install, easy_install-X.Y
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#
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# pip 1.5+ allows ensurepip to request that some of those be left out
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if altinstall:
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# omit pip, pipX and easy_install
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os.environ["ENSUREPIP_OPTIONS"] = "altinstall"
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elif not default_pip:
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# omit pip and easy_install
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os.environ["ENSUREPIP_OPTIONS"] = "install"
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with tempfile.TemporaryDirectory() as tmpdir:
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# Put our bundled wheels into a temporary directory and construct the
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# additional paths that need added to sys.path
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additional_paths = []
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for project, version in _PROJECTS:
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wheel_name = "{}-{}-py2.py3-none-any.whl".format(project, version)
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whl = pkgutil.get_data(
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"ensurepip",
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"_bundled/{}".format(wheel_name),
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)
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with open(os.path.join(tmpdir, wheel_name), "wb") as fp:
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fp.write(whl)
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additional_paths.append(os.path.join(tmpdir, wheel_name))
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# Construct the arguments to be passed to the pip command
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args = ["install", "--no-index", "--find-links", tmpdir]
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if root:
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args += ["--root", root]
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if upgrade:
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args += ["--upgrade"]
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if user:
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args += ["--user"]
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if verbosity:
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args += ["-" + "v" * verbosity]
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_run_pip(args + [p[0] for p in _PROJECTS], additional_paths)
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def _uninstall_helper(*, verbosity=0):
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"""Helper to support a clean default uninstall process on Windows
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Note that calling this function may alter os.environ.
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"""
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# Nothing to do if pip was never installed, or has been removed
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try:
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import pip
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except ImportError:
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return
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# If the pip version doesn't match the bundled one, leave it alone
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if pip.__version__ != _PIP_VERSION:
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msg = ("ensurepip will only uninstall a matching version "
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"({!r} installed, {!r} bundled)")
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print(msg.format(pip.__version__, _PIP_VERSION), file=sys.stderr)
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return
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_require_ssl_for_pip()
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_disable_pip_configuration_settings()
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# Construct the arguments to be passed to the pip command
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args = ["uninstall", "-y", "--disable-pip-version-check"]
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if verbosity:
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args += ["-" + "v" * verbosity]
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_run_pip(args + [p[0] for p in reversed(_PROJECTS)])
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def _main(argv=None):
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if ssl is None:
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print("Ignoring ensurepip failure: {}".format(_MISSING_SSL_MESSAGE),
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file=sys.stderr)
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return
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import argparse
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parser = argparse.ArgumentParser(prog="python -m ensurepip")
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parser.add_argument(
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"--version",
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action="version",
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version="pip {}".format(version()),
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help="Show the version of pip that is bundled with this Python.",
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)
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parser.add_argument(
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"-v", "--verbose",
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action="count",
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default=0,
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dest="verbosity",
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help=("Give more output. Option is additive, and can be used up to 3 "
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"times."),
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)
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parser.add_argument(
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"-U", "--upgrade",
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action="store_true",
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default=False,
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help="Upgrade pip and dependencies, even if already installed.",
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)
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parser.add_argument(
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"--user",
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action="store_true",
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default=False,
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help="Install using the user scheme.",
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)
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parser.add_argument(
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"--root",
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default=None,
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help="Install everything relative to this alternate root directory.",
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)
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parser.add_argument(
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"--altinstall",
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action="store_true",
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default=False,
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help=("Make an alternate install, installing only the X.Y versioned"
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"scripts (Default: pipX, pipX.Y, easy_install-X.Y)"),
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)
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parser.add_argument(
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"--default-pip",
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action="store_true",
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default=False,
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help=("Make a default pip install, installing the unqualified pip "
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"and easy_install in addition to the versioned scripts"),
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)
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args = parser.parse_args(argv)
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bootstrap(
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root=args.root,
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upgrade=args.upgrade,
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user=args.user,
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verbosity=args.verbosity,
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altinstall=args.altinstall,
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default_pip=args.default_pip,
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)
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