major changes

env/lib/python3.5/site-packages/pip/_internal/cli/status_codes.py

+from __future__ import absolute_import
+
+SUCCESS = 0
+ERROR = 1
+UNKNOWN_ERROR = 2
+VIRTUALENV_NOT_FOUND = 3
+PREVIOUS_BUILD_DIR_ERROR = 4
+NO_MATCHES_FOUND = 23

env/lib/python3.5/site-packages/pip/_internal/commands/__init__.py

+"""
+Package containing all pip commands
+"""
+
+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import importlib
+from collections import OrderedDict, namedtuple
+
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any
+    from pip._internal.cli.base_command import Command
+
+
+CommandInfo = namedtuple('CommandInfo', 'module_path, class_name, summary')
+
+# The ordering matters for help display.
+#    Also, even though the module path starts with the same
+# "pip._internal.commands" prefix in each case, we include the full path
+# because it makes testing easier (specifically when modifying commands_dict
+# in test setup / teardown by adding info for a FakeCommand class defined
+# in a test-related module).
+#    Finally, we need to pass an iterable of pairs here rather than a dict
+# so that the ordering won't be lost when using Python 2.7.
+commands_dict = OrderedDict([
+    ('install', CommandInfo(
+        'pip._internal.commands.install', 'InstallCommand',
+        'Install packages.',
+    )),
+    ('download', CommandInfo(
+        'pip._internal.commands.download', 'DownloadCommand',
+        'Download packages.',
+    )),
+    ('uninstall', CommandInfo(
+        'pip._internal.commands.uninstall', 'UninstallCommand',
+        'Uninstall packages.',
+    )),
+    ('freeze', CommandInfo(
+        'pip._internal.commands.freeze', 'FreezeCommand',
+        'Output installed packages in requirements format.',
+    )),
+    ('list', CommandInfo(
+        'pip._internal.commands.list', 'ListCommand',
+        'List installed packages.',
+    )),
+    ('show', CommandInfo(
+        'pip._internal.commands.show', 'ShowCommand',
+        'Show information about installed packages.',
+    )),
+    ('check', CommandInfo(
+        'pip._internal.commands.check', 'CheckCommand',
+        'Verify installed packages have compatible dependencies.',
+    )),
+    ('config', CommandInfo(
+        'pip._internal.commands.configuration', 'ConfigurationCommand',
+        'Manage local and global configuration.',
+    )),
+    ('search', CommandInfo(
+        'pip._internal.commands.search', 'SearchCommand',
+        'Search PyPI for packages.',
+    )),
+    ('wheel', CommandInfo(
+        'pip._internal.commands.wheel', 'WheelCommand',
+        'Build wheels from your requirements.',
+    )),
+    ('hash', CommandInfo(
+        'pip._internal.commands.hash', 'HashCommand',
+        'Compute hashes of package archives.',
+    )),
+    ('completion', CommandInfo(
+        'pip._internal.commands.completion', 'CompletionCommand',
+        'A helper command used for command completion.',
+    )),
+    ('debug', CommandInfo(
+        'pip._internal.commands.debug', 'DebugCommand',
+        'Show information useful for debugging.',
+    )),
+    ('help', CommandInfo(
+        'pip._internal.commands.help', 'HelpCommand',
+        'Show help for commands.',
+    )),
+])  # type: OrderedDict[str, CommandInfo]
+
+
+def create_command(name, **kwargs):
+    # type: (str, **Any) -> Command
+    """
+    Create an instance of the Command class with the given name.
+    """
+    module_path, class_name, summary = commands_dict[name]
+    module = importlib.import_module(module_path)
+    command_class = getattr(module, class_name)
+    command = command_class(name=name, summary=summary, **kwargs)
+
+    return command
+
+
+def get_similar_commands(name):
+    """Command name auto-correct."""
+    from difflib import get_close_matches
+
+    name = name.lower()
+
+    close_commands = get_close_matches(name, commands_dict.keys())
+
+    if close_commands:
+        return close_commands[0]
+    else:
+        return False

env/lib/python3.5/site-packages/pip/_internal/commands/check.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+import logging
+
+from pip._internal.cli.base_command import Command
+from pip._internal.operations.check import (
+    check_package_set,
+    create_package_set_from_installed,
+)
+from pip._internal.utils.misc import write_output
+
+logger = logging.getLogger(__name__)
+
+
+class CheckCommand(Command):
+    """Verify installed packages have compatible dependencies."""
+
+    usage = """
+      %prog [options]"""
+
+    def run(self, options, args):
+        package_set, parsing_probs = create_package_set_from_installed()
+        missing, conflicting = check_package_set(package_set)
+
+        for project_name in missing:
+            version = package_set[project_name].version
+            for dependency in missing[project_name]:
+                write_output(
+                    "%s %s requires %s, which is not installed.",
+                    project_name, version, dependency[0],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name].version
+            for dep_name, dep_version, req in conflicting[project_name]:
+                write_output(
+                    "%s %s has requirement %s, but you have %s %s.",
+                    project_name, version, req, dep_name, dep_version,
+                )
+
+        if missing or conflicting or parsing_probs:
+            return 1
+        else:
+            write_output("No broken requirements found.")

env/lib/python3.5/site-packages/pip/_internal/commands/completion.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import sys
+import textwrap
+
+from pip._internal.cli.base_command import Command
+from pip._internal.utils.misc import get_prog
+
+BASE_COMPLETION = """
+# pip %(shell)s completion start%(script)s# pip %(shell)s completion end
+"""
+
+COMPLETION_SCRIPTS = {
+    'bash': """
+        _pip_completion()
+        {
+            COMPREPLY=( $( COMP_WORDS="${COMP_WORDS[*]}" \\
+                           COMP_CWORD=$COMP_CWORD \\
+                           PIP_AUTO_COMPLETE=1 $1 2>/dev/null ) )
+        }
+        complete -o default -F _pip_completion %(prog)s
+    """,
+    'zsh': """
+        function _pip_completion {
+          local words cword
+          read -Ac words
+          read -cn cword
+          reply=( $( COMP_WORDS="$words[*]" \\
+                     COMP_CWORD=$(( cword-1 )) \\
+                     PIP_AUTO_COMPLETE=1 $words[1] 2>/dev/null ))
+        }
+        compctl -K _pip_completion %(prog)s
+    """,
+    'fish': """
+        function __fish_complete_pip
+            set -lx COMP_WORDS (commandline -o) ""
+            set -lx COMP_CWORD ( \\
+                math (contains -i -- (commandline -t) $COMP_WORDS)-1 \\
+            )
+            set -lx PIP_AUTO_COMPLETE 1
+            string split \\  -- (eval $COMP_WORDS[1])
+        end
+        complete -fa "(__fish_complete_pip)" -c %(prog)s
+    """,
+}
+
+
+class CompletionCommand(Command):
+    """A helper command to be used for command completion."""
+
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(CompletionCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(
+            '--bash', '-b',
+            action='store_const',
+            const='bash',
+            dest='shell',
+            help='Emit completion code for bash')
+        cmd_opts.add_option(
+            '--zsh', '-z',
+            action='store_const',
+            const='zsh',
+            dest='shell',
+            help='Emit completion code for zsh')
+        cmd_opts.add_option(
+            '--fish', '-f',
+            action='store_const',
+            const='fish',
+            dest='shell',
+            help='Emit completion code for fish')
+
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        """Prints the completion code of the given shell"""
+        shells = COMPLETION_SCRIPTS.keys()
+        shell_options = ['--' + shell for shell in sorted(shells)]
+        if options.shell in shells:
+            script = textwrap.dedent(
+                COMPLETION_SCRIPTS.get(options.shell, '') % {
+                    'prog': get_prog(),
+                }
+            )
+            print(BASE_COMPLETION % {'script': script, 'shell': options.shell})
+        else:
+            sys.stderr.write(
+                'ERROR: You must pass %s\n' % ' or '.join(shell_options)
+            )

env/lib/python3.5/site-packages/pip/_internal/commands/configuration.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+import logging
+import os
+import subprocess
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.configuration import (
+    Configuration,
+    get_configuration_files,
+    kinds,
+)
+from pip._internal.exceptions import PipError
+from pip._internal.utils.misc import get_prog, write_output
+
+logger = logging.getLogger(__name__)
+
+
+class ConfigurationCommand(Command):
+    """Manage local and global configuration.
+
+        Subcommands:
+
+        list: List the active configuration (or from the file specified)
+        edit: Edit the configuration file in an editor
+        get: Get the value associated with name
+        set: Set the name=value
+        unset: Unset the value associated with name
+
+        If none of --user, --global and --site are passed, a virtual
+        environment configuration file is used if one is active and the file
+        exists. Otherwise, all modifications happen on the to the user file by
+        default.
+    """
+
+    ignore_require_venv = True
+    usage = """
+        %prog [<file-option>] list
+        %prog [<file-option>] [--editor <editor-path>] edit
+
+        %prog [<file-option>] get name
+        %prog [<file-option>] set name value
+        %prog [<file-option>] unset name
+    """
+
+    def __init__(self, *args, **kwargs):
+        super(ConfigurationCommand, self).__init__(*args, **kwargs)
+
+        self.configuration = None
+
+        self.cmd_opts.add_option(
+            '--editor',
+            dest='editor',
+            action='store',
+            default=None,
+            help=(
+                'Editor to use to edit the file. Uses VISUAL or EDITOR '
+                'environment variables if not provided.'
+            )
+        )
+
+        self.cmd_opts.add_option(
+            '--global',
+            dest='global_file',
+            action='store_true',
+            default=False,
+            help='Use the system-wide configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user_file',
+            action='store_true',
+            default=False,
+            help='Use the user configuration file only'
+        )
+
+        self.cmd_opts.add_option(
+            '--site',
+            dest='site_file',
+            action='store_true',
+            default=False,
+            help='Use the current environment configuration file only'
+        )
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        handlers = {
+            "list": self.list_values,
+            "edit": self.open_in_editor,
+            "get": self.get_name,
+            "set": self.set_name_value,
+            "unset": self.unset_name
+        }
+
+        # Determine action
+        if not args or args[0] not in handlers:
+            logger.error("Need an action ({}) to perform.".format(
+                ", ".join(sorted(handlers)))
+            )
+            return ERROR
+
+        action = args[0]
+
+        # Determine which configuration files are to be loaded
+        #    Depends on whether the command is modifying.
+        try:
+            load_only = self._determine_file(
+                options, need_value=(action in ["get", "set", "unset", "edit"])
+            )
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        # Load a new configuration
+        self.configuration = Configuration(
+            isolated=options.isolated_mode, load_only=load_only
+        )
+        self.configuration.load()
+
+        # Error handling happens here, not in the action-handlers.
+        try:
+            handlers[action](options, args[1:])
+        except PipError as e:
+            logger.error(e.args[0])
+            return ERROR
+
+        return SUCCESS
+
+    def _determine_file(self, options, need_value):
+        file_options = [key for key, value in (
+            (kinds.USER, options.user_file),
+            (kinds.GLOBAL, options.global_file),
+            (kinds.SITE, options.site_file),
+        ) if value]
+
+        if not file_options:
+            if not need_value:
+                return None
+            # Default to user, unless there's a site file.
+            elif any(
+                os.path.exists(site_config_file)
+                for site_config_file in get_configuration_files()[kinds.SITE]
+            ):
+                return kinds.SITE
+            else:
+                return kinds.USER
+        elif len(file_options) == 1:
+            return file_options[0]
+
+        raise PipError(
+            "Need exactly one file to operate upon "
+            "(--user, --site, --global) to perform."
+        )
+
+    def list_values(self, options, args):
+        self._get_n_args(args, "list", n=0)
+
+        for key, value in sorted(self.configuration.items()):
+            write_output("%s=%r", key, value)
+
+    def get_name(self, options, args):
+        key = self._get_n_args(args, "get [name]", n=1)
+        value = self.configuration.get_value(key)
+
+        write_output("%s", value)
+
+    def set_name_value(self, options, args):
+        key, value = self._get_n_args(args, "set [name] [value]", n=2)
+        self.configuration.set_value(key, value)
+
+        self._save_configuration()
+
+    def unset_name(self, options, args):
+        key = self._get_n_args(args, "unset [name]", n=1)
+        self.configuration.unset_value(key)
+
+        self._save_configuration()
+
+    def open_in_editor(self, options, args):
+        editor = self._determine_editor(options)
+
+        fname = self.configuration.get_file_to_edit()
+        if fname is None:
+            raise PipError("Could not determine appropriate file.")
+
+        try:
+            subprocess.check_call([editor, fname])
+        except subprocess.CalledProcessError as e:
+            raise PipError(
+                "Editor Subprocess exited with exit code {}"
+                .format(e.returncode)
+            )
+
+    def _get_n_args(self, args, example, n):
+        """Helper to make sure the command got the right number of arguments
+        """
+        if len(args) != n:
+            msg = (
+                'Got unexpected number of arguments, expected {}. '
+                '(example: "{} config {}")'
+            ).format(n, get_prog(), example)
+            raise PipError(msg)
+
+        if n == 1:
+            return args[0]
+        else:
+            return args
+
+    def _save_configuration(self):
+        # We successfully ran a modifying command. Need to save the
+        # configuration.
+        try:
+            self.configuration.save()
+        except Exception:
+            logger.error(
+                "Unable to save configuration. Please report this as a bug.",
+                exc_info=1
+            )
+            raise PipError("Internal Error.")
+
+    def _determine_editor(self, options):
+        if options.editor is not None:
+            return options.editor
+        elif "VISUAL" in os.environ:
+            return os.environ["VISUAL"]
+        elif "EDITOR" in os.environ:
+            return os.environ["EDITOR"]
+        else:
+            raise PipError("Could not determine editor to use.")

env/lib/python3.5/site-packages/pip/_internal/commands/debug.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import locale
+import logging
+import os
+import sys
+
+from pip._vendor.certifi import where
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.utils.logging import indent_log
+from pip._internal.utils.misc import get_pip_version
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import Any, List, Optional
+    from optparse import Values
+
+logger = logging.getLogger(__name__)
+
+
+def show_value(name, value):
+    # type: (str, Optional[str]) -> None
+    logger.info('{}: {}'.format(name, value))
+
+
+def show_sys_implementation():
+    # type: () -> None
+    logger.info('sys.implementation:')
+    if hasattr(sys, 'implementation'):
+        implementation = sys.implementation  # type: ignore
+        implementation_name = implementation.name
+    else:
+        implementation_name = ''
+
+    with indent_log():
+        show_value('name', implementation_name)
+
+
+def show_tags(options):
+    # type: (Values) -> None
+    tag_limit = 10
+
+    target_python = make_target_python(options)
+    tags = target_python.get_tags()
+
+    # Display the target options that were explicitly provided.
+    formatted_target = target_python.format_given()
+    suffix = ''
+    if formatted_target:
+        suffix = ' (target: {})'.format(formatted_target)
+
+    msg = 'Compatible tags: {}{}'.format(len(tags), suffix)
+    logger.info(msg)
+
+    if options.verbose < 1 and len(tags) > tag_limit:
+        tags_limited = True
+        tags = tags[:tag_limit]
+    else:
+        tags_limited = False
+
+    with indent_log():
+        for tag in tags:
+            logger.info(str(tag))
+
+        if tags_limited:
+            msg = (
+                '...\n'
+                '[First {tag_limit} tags shown. Pass --verbose to show all.]'
+            ).format(tag_limit=tag_limit)
+            logger.info(msg)
+
+
+def ca_bundle_info(config):
+    levels = set()
+    for key, value in config.items():
+        levels.add(key.split('.')[0])
+
+    if not levels:
+        return "Not specified"
+
+    levels_that_override_global = ['install', 'wheel', 'download']
+    global_overriding_level = [
+        level for level in levels if level in levels_that_override_global
+    ]
+    if not global_overriding_level:
+        return 'global'
+
+    levels.remove('global')
+    return ", ".join(levels)
+
+
+class DebugCommand(Command):
+    """
+    Display debug information.
+    """
+
+    usage = """
+      %prog <options>"""
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(DebugCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+        cmdoptions.add_target_python_options(cmd_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+        self.parser.config.load()
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+        logger.warning(
+            "This command is only meant for debugging. "
+            "Do not use this with automation for parsing and getting these "
+            "details, since the output and options of this command may "
+            "change without notice."
+        )
+        show_value('pip version', get_pip_version())
+        show_value('sys.version', sys.version)
+        show_value('sys.executable', sys.executable)
+        show_value('sys.getdefaultencoding', sys.getdefaultencoding())
+        show_value('sys.getfilesystemencoding', sys.getfilesystemencoding())
+        show_value(
+            'locale.getpreferredencoding', locale.getpreferredencoding(),
+        )
+        show_value('sys.platform', sys.platform)
+        show_sys_implementation()
+
+        show_value("'cert' config value", ca_bundle_info(self.parser.config))
+        show_value("REQUESTS_CA_BUNDLE", os.environ.get('REQUESTS_CA_BUNDLE'))
+        show_value("CURL_CA_BUNDLE", os.environ.get('CURL_CA_BUNDLE'))
+        show_value("pip._vendor.certifi.where()", where())
+
+        show_tags(options)
+
+        return SUCCESS

env/lib/python3.5/site-packages/pip/_internal/commands/download.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import logging
+import os
+
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import RequirementCommand
+from pip._internal.req import RequirementSet
+from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.utils.misc import ensure_dir, normalize_path, write_output
+from pip._internal.utils.temp_dir import TempDirectory
+
+logger = logging.getLogger(__name__)
+
+
+class DownloadCommand(RequirementCommand):
+    """
+    Download packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports downloading from "requirements files", which provide
+    an easy way to specify a whole environment to be downloaded.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] <vcs project url> ...
+      %prog [options] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def __init__(self, *args, **kw):
+        super(DownloadCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(cmdoptions.constraints())
+        cmd_opts.add_option(cmdoptions.requirements())
+        cmd_opts.add_option(cmdoptions.build_dir())
+        cmd_opts.add_option(cmdoptions.no_deps())
+        cmd_opts.add_option(cmdoptions.global_options())
+        cmd_opts.add_option(cmdoptions.no_binary())
+        cmd_opts.add_option(cmdoptions.only_binary())
+        cmd_opts.add_option(cmdoptions.prefer_binary())
+        cmd_opts.add_option(cmdoptions.src())
+        cmd_opts.add_option(cmdoptions.pre())
+        cmd_opts.add_option(cmdoptions.no_clean())
+        cmd_opts.add_option(cmdoptions.require_hashes())
+        cmd_opts.add_option(cmdoptions.progress_bar())
+        cmd_opts.add_option(cmdoptions.no_build_isolation())
+        cmd_opts.add_option(cmdoptions.use_pep517())
+        cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        cmd_opts.add_option(
+            '-d', '--dest', '--destination-dir', '--destination-directory',
+            dest='download_dir',
+            metavar='dir',
+            default=os.curdir,
+            help=("Download packages into <dir>."),
+        )
+
+        cmdoptions.add_target_python_options(cmd_opts)
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        options.ignore_installed = True
+        # editable doesn't really make sense for `pip download`, but the bowels
+        # of the RequirementSet code require that property.
+        options.editables = []
+
+        cmdoptions.check_dist_restriction(options)
+
+        options.download_dir = normalize_path(options.download_dir)
+
+        ensure_dir(options.download_dir)
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+        )
+        build_delete = (not (options.no_clean or options.build_dir))
+
+        with get_requirement_tracker() as req_tracker, TempDirectory(
+            options.build_dir, delete=build_delete, kind="download"
+        ) as directory:
+
+            requirement_set = RequirementSet()
+            self.populate_requirement_set(
+                requirement_set,
+                args,
+                options,
+                finder,
+                session,
+                None
+            )
+
+            preparer = self.make_requirement_preparer(
+                temp_build_dir=directory,
+                options=options,
+                req_tracker=req_tracker,
+                session=session,
+                finder=finder,
+                download_dir=options.download_dir,
+                use_user_site=False,
+            )
+
+            resolver = self.make_resolver(
+                preparer=preparer,
+                finder=finder,
+                options=options,
+                py_version_info=options.python_version,
+            )
+
+            self.trace_basic_info(finder)
+
+            resolver.resolve(requirement_set)
+
+            downloaded = ' '.join([
+                req.name for req in requirement_set.successfully_downloaded
+            ])
+            if downloaded:
+                write_output('Successfully downloaded %s', downloaded)
+
+            # Clean up
+            if not options.no_clean:
+                requirement_set.cleanup_files()
+
+        return requirement_set

env/lib/python3.5/site-packages/pip/_internal/commands/freeze.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import sys
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.base_command import Command
+from pip._internal.models.format_control import FormatControl
+from pip._internal.operations.freeze import freeze
+from pip._internal.utils.compat import stdlib_pkgs
+
+DEV_PKGS = {'pip', 'setuptools', 'distribute', 'wheel'}
+
+
+class FreezeCommand(Command):
+    """
+    Output installed packages in requirements format.
+
+    packages are listed in a case-insensitive sorted order.
+    """
+
+    usage = """
+      %prog [options]"""
+    log_streams = ("ext://sys.stderr", "ext://sys.stderr")
+
+    def __init__(self, *args, **kw):
+        super(FreezeCommand, self).__init__(*args, **kw)
+
+        self.cmd_opts.add_option(
+            '-r', '--requirement',
+            dest='requirements',
+            action='append',
+            default=[],
+            metavar='file',
+            help="Use the order in the given requirements file and its "
+                 "comments when generating output. This option can be "
+                 "used multiple times.")
+        self.cmd_opts.add_option(
+            '-f', '--find-links',
+            dest='find_links',
+            action='append',
+            default=[],
+            metavar='URL',
+            help='URL for finding packages, which will be added to the '
+                 'output.')
+        self.cmd_opts.add_option(
+            '-l', '--local',
+            dest='local',
+            action='store_true',
+            default=False,
+            help='If in a virtualenv that has global access, do not output '
+                 'globally-installed packages.')
+        self.cmd_opts.add_option(
+            '--user',
+            dest='user',
+            action='store_true',
+            default=False,
+            help='Only output packages installed in user-site.')
+        self.cmd_opts.add_option(cmdoptions.list_path())
+        self.cmd_opts.add_option(
+            '--all',
+            dest='freeze_all',
+            action='store_true',
+            help='Do not skip these packages in the output:'
+                 ' %s' % ', '.join(DEV_PKGS))
+        self.cmd_opts.add_option(
+            '--exclude-editable',
+            dest='exclude_editable',
+            action='store_true',
+            help='Exclude editable package from output.')
+
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        format_control = FormatControl(set(), set())
+        wheel_cache = WheelCache(options.cache_dir, format_control)
+        skip = set(stdlib_pkgs)
+        if not options.freeze_all:
+            skip.update(DEV_PKGS)
+
+        cmdoptions.check_list_path_option(options)
+
+        freeze_kwargs = dict(
+            requirement=options.requirements,
+            find_links=options.find_links,
+            local_only=options.local,
+            user_only=options.user,
+            paths=options.path,
+            skip_regex=options.skip_requirements_regex,
+            isolated=options.isolated_mode,
+            wheel_cache=wheel_cache,
+            skip=skip,
+            exclude_editable=options.exclude_editable,
+        )
+
+        try:
+            for line in freeze(**freeze_kwargs):
+                sys.stdout.write(line + '\n')
+        finally:
+            wheel_cache.cleanup()

env/lib/python3.5/site-packages/pip/_internal/commands/hash.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import hashlib
+import logging
+import sys
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import ERROR
+from pip._internal.utils.hashes import FAVORITE_HASH, STRONG_HASHES
+from pip._internal.utils.misc import read_chunks, write_output
+
+logger = logging.getLogger(__name__)
+
+
+class HashCommand(Command):
+    """
+    Compute a hash of a local package archive.
+
+    These can be used with --hash in a requirements file to do repeatable
+    installs.
+    """
+
+    usage = '%prog [options] <file> ...'
+    ignore_require_venv = True
+
+    def __init__(self, *args, **kw):
+        super(HashCommand, self).__init__(*args, **kw)
+        self.cmd_opts.add_option(
+            '-a', '--algorithm',
+            dest='algorithm',
+            choices=STRONG_HASHES,
+            action='store',
+            default=FAVORITE_HASH,
+            help='The hash algorithm to use: one of %s' %
+                 ', '.join(STRONG_HASHES))
+        self.parser.insert_option_group(0, self.cmd_opts)
+
+    def run(self, options, args):
+        if not args:
+            self.parser.print_usage(sys.stderr)
+            return ERROR
+
+        algorithm = options.algorithm
+        for path in args:
+            write_output('%s:\n--hash=%s:%s',
+                         path, algorithm, _hash_of_file(path, algorithm))
+
+
+def _hash_of_file(path, algorithm):
+    """Return the hash digest of a file."""
+    with open(path, 'rb') as archive:
+        hash = hashlib.new(algorithm)
+        for chunk in read_chunks(archive):
+            hash.update(chunk)
+    return hash.hexdigest()

env/lib/python3.5/site-packages/pip/_internal/commands/help.py

+# The following comment should be removed at some point in the future.
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+from pip._internal.cli.base_command import Command
+from pip._internal.cli.status_codes import SUCCESS
+from pip._internal.exceptions import CommandError
+
+
+class HelpCommand(Command):
+    """Show help for commands"""
+
+    usage = """
+      %prog <command>"""
+    ignore_require_venv = True
+
+    def run(self, options, args):
+        from pip._internal.commands import (
+            commands_dict, create_command, get_similar_commands,
+        )
+
+        try:
+            # 'pip help' with no args is handled by pip.__init__.parseopt()
+            cmd_name = args[0]  # the command we need help for
+        except IndexError:
+            return SUCCESS
+
+        if cmd_name not in commands_dict:
+            guess = get_similar_commands(cmd_name)
+
+            msg = ['unknown command "%s"' % cmd_name]
+            if guess:
+                msg.append('maybe you meant "%s"' % guess)
+
+            raise CommandError(' - '.join(msg))
+
+        command = create_command(cmd_name)
+        command.parser.print_help()
+
+        return SUCCESS

env/lib/python3.5/site-packages/pip/_internal/commands/install.py

+# The following comment should be removed at some point in the future.
+# It's included for now because without it InstallCommand.run() has a
+# couple errors where we have to know req.name is str rather than
+# Optional[str] for the InstallRequirement req.
+# mypy: strict-optional=False
+# mypy: disallow-untyped-defs=False
+
+from __future__ import absolute_import
+
+import errno
+import logging
+import operator
+import os
+import shutil
+import site
+from optparse import SUPPRESS_HELP
+
+from pip._vendor import pkg_resources
+from pip._vendor.packaging.utils import canonicalize_name
+
+from pip._internal.cache import WheelCache
+from pip._internal.cli import cmdoptions
+from pip._internal.cli.cmdoptions import make_target_python
+from pip._internal.cli.req_command import RequirementCommand
+from pip._internal.cli.status_codes import ERROR, SUCCESS
+from pip._internal.exceptions import (
+    CommandError,
+    InstallationError,
+    PreviousBuildDirError,
+)
+from pip._internal.locations import distutils_scheme
+from pip._internal.operations.check import check_install_conflicts
+from pip._internal.req import RequirementSet, install_given_reqs
+from pip._internal.req.req_tracker import get_requirement_tracker
+from pip._internal.utils.deprecation import deprecated
+from pip._internal.utils.distutils_args import parse_distutils_args
+from pip._internal.utils.filesystem import test_writable_dir
+from pip._internal.utils.misc import (
+    ensure_dir,
+    get_installed_version,
+    protect_pip_from_modification_on_windows,
+    write_output,
+)
+from pip._internal.utils.temp_dir import TempDirectory
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+from pip._internal.utils.virtualenv import virtualenv_no_global
+from pip._internal.wheel_builder import build, should_build_for_install_command
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Any, Iterable, List, Optional
+
+    from pip._internal.models.format_control import FormatControl
+    from pip._internal.req.req_install import InstallRequirement
+    from pip._internal.wheel_builder import BinaryAllowedPredicate
+
+
+logger = logging.getLogger(__name__)
+
+
+def get_check_binary_allowed(format_control):
+    # type: (FormatControl) -> BinaryAllowedPredicate
+    def check_binary_allowed(req):
+        # type: (InstallRequirement) -> bool
+        if req.use_pep517:
+            return True
+        canonical_name = canonicalize_name(req.name)
+        allowed_formats = format_control.get_allowed_formats(canonical_name)
+        return "binary" in allowed_formats
+
+    return check_binary_allowed
+
+
+class InstallCommand(RequirementCommand):
+    """
+    Install packages from:
+
+    - PyPI (and other indexes) using requirement specifiers.
+    - VCS project urls.
+    - Local project directories.
+    - Local or remote source archives.
+
+    pip also supports installing from "requirements files", which provide
+    an easy way to specify a whole environment to be installed.
+    """
+
+    usage = """
+      %prog [options] <requirement specifier> [package-index-options] ...
+      %prog [options] -r <requirements file> [package-index-options] ...
+      %prog [options] [-e] <vcs project url> ...
+      %prog [options] [-e] <local project path> ...
+      %prog [options] <archive url/path> ..."""
+
+    def __init__(self, *args, **kw):
+        super(InstallCommand, self).__init__(*args, **kw)
+
+        cmd_opts = self.cmd_opts
+
+        cmd_opts.add_option(cmdoptions.requirements())
+        cmd_opts.add_option(cmdoptions.constraints())
+        cmd_opts.add_option(cmdoptions.no_deps())
+        cmd_opts.add_option(cmdoptions.pre())
+
+        cmd_opts.add_option(cmdoptions.editable())
+        cmd_opts.add_option(
+            '-t', '--target',
+            dest='target_dir',
+            metavar='dir',
+            default=None,
+            help='Install packages into <dir>. '
+                 'By default this will not replace existing files/folders in '
+                 '<dir>. Use --upgrade to replace existing packages in <dir> '
+                 'with new versions.'
+        )
+        cmdoptions.add_target_python_options(cmd_opts)
+
+        cmd_opts.add_option(
+            '--user',
+            dest='use_user_site',
+            action='store_true',
+            help="Install to the Python user install directory for your "
+                 "platform. Typically ~/.local/, or %APPDATA%\\Python on "
+                 "Windows. (See the Python documentation for site.USER_BASE "
+                 "for full details.)")
+        cmd_opts.add_option(
+            '--no-user',
+            dest='use_user_site',
+            action='store_false',
+            help=SUPPRESS_HELP)
+        cmd_opts.add_option(
+            '--root',
+            dest='root_path',
+            metavar='dir',
+            default=None,
+            help="Install everything relative to this alternate root "
+                 "directory.")
+        cmd_opts.add_option(
+            '--prefix',
+            dest='prefix_path',
+            metavar='dir',
+            default=None,
+            help="Installation prefix where lib, bin and other top-level "
+                 "folders are placed")
+
+        cmd_opts.add_option(cmdoptions.build_dir())
+
+        cmd_opts.add_option(cmdoptions.src())
+
+        cmd_opts.add_option(
+            '-U', '--upgrade',
+            dest='upgrade',
+            action='store_true',
+            help='Upgrade all specified packages to the newest available '
+                 'version. The handling of dependencies depends on the '
+                 'upgrade-strategy used.'
+        )
+
+        cmd_opts.add_option(
+            '--upgrade-strategy',
+            dest='upgrade_strategy',
+            default='only-if-needed',
+            choices=['only-if-needed', 'eager'],
+            help='Determines how dependency upgrading should be handled '
+                 '[default: %default]. '
+                 '"eager" - dependencies are upgraded regardless of '
+                 'whether the currently installed version satisfies the '
+                 'requirements of the upgraded package(s). '
+                 '"only-if-needed" -  are upgraded only when they do not '
+                 'satisfy the requirements of the upgraded package(s).'
+        )
+
+        cmd_opts.add_option(
+            '--force-reinstall',
+            dest='force_reinstall',
+            action='store_true',
+            help='Reinstall all packages even if they are already '
+                 'up-to-date.')
+
+        cmd_opts.add_option(
+            '-I', '--ignore-installed',
+            dest='ignore_installed',
+            action='store_true',
+            help='Ignore the installed packages, overwriting them. '
+                 'This can break your system if the existing package '
+                 'is of a different version or was installed '
+                 'with a different package manager!'
+        )
+
+        cmd_opts.add_option(cmdoptions.ignore_requires_python())
+        cmd_opts.add_option(cmdoptions.no_build_isolation())
+        cmd_opts.add_option(cmdoptions.use_pep517())
+        cmd_opts.add_option(cmdoptions.no_use_pep517())
+
+        cmd_opts.add_option(cmdoptions.install_options())
+        cmd_opts.add_option(cmdoptions.global_options())
+
+        cmd_opts.add_option(
+            "--compile",
+            action="store_true",
+            dest="compile",
+            default=True,
+            help="Compile Python source files to bytecode",
+        )
+
+        cmd_opts.add_option(
+            "--no-compile",
+            action="store_false",
+            dest="compile",
+            help="Do not compile Python source files to bytecode",
+        )
+
+        cmd_opts.add_option(
+            "--no-warn-script-location",
+            action="store_false",
+            dest="warn_script_location",
+            default=True,
+            help="Do not warn when installing scripts outside PATH",
+        )
+        cmd_opts.add_option(
+            "--no-warn-conflicts",
+            action="store_false",
+            dest="warn_about_conflicts",
+            default=True,
+            help="Do not warn about broken dependencies",
+        )
+
+        cmd_opts.add_option(cmdoptions.no_binary())
+        cmd_opts.add_option(cmdoptions.only_binary())
+        cmd_opts.add_option(cmdoptions.prefer_binary())
+        cmd_opts.add_option(cmdoptions.no_clean())
+        cmd_opts.add_option(cmdoptions.require_hashes())
+        cmd_opts.add_option(cmdoptions.progress_bar())
+
+        index_opts = cmdoptions.make_option_group(
+            cmdoptions.index_group,
+            self.parser,
+        )
+
+        self.parser.insert_option_group(0, index_opts)
+        self.parser.insert_option_group(0, cmd_opts)
+
+    def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+        cmdoptions.check_install_build_global(options)
+        upgrade_strategy = "to-satisfy-only"
+        if options.upgrade:
+            upgrade_strategy = options.upgrade_strategy
+
+        cmdoptions.check_dist_restriction(options, check_target=True)
+
+        install_options = options.install_options or []
+
+        options.use_user_site = decide_user_install(
+            options.use_user_site,
+            prefix_path=options.prefix_path,
+            target_dir=options.target_dir,
+            root_path=options.root_path,
+            isolated_mode=options.isolated_mode,
+        )
+
+        target_temp_dir = None  # type: Optional[TempDirectory]
+        target_temp_dir_path = None  # type: Optional[str]
+        if options.target_dir:
+            options.ignore_installed = True
+            options.target_dir = os.path.abspath(options.target_dir)
+            if (os.path.exists(options.target_dir) and not
+                    os.path.isdir(options.target_dir)):
+                raise CommandError(
+                    "Target path exists but is not a directory, will not "
+                    "continue."
+                )
+
+            # Create a target directory for using with the target option
+            target_temp_dir = TempDirectory(kind="target")
+            target_temp_dir_path = target_temp_dir.path
+
+        global_options = options.global_options or []
+
+        session = self.get_default_session(options)
+
+        target_python = make_target_python(options)
+        finder = self._build_package_finder(
+            options=options,
+            session=session,
+            target_python=target_python,
+            ignore_requires_python=options.ignore_requires_python,
+        )
+        build_delete = (not (options.no_clean or options.build_dir))
+        wheel_cache = WheelCache(options.cache_dir, options.format_control)
+
+        with get_requirement_tracker() as req_tracker, TempDirectory(
+            options.build_dir, delete=build_delete, kind="install"
+        ) as directory:
+            requirement_set = RequirementSet(
+                check_supported_wheels=not options.target_dir,
+            )
+
+            try:
+                self.populate_requirement_set(
+                    requirement_set, args, options, finder, session,
+                    wheel_cache
+                )
+
+                warn_deprecated_install_options(
+                    requirement_set, options.install_options
+                )
+
+                preparer = self.make_requirement_preparer(
+                    temp_build_dir=directory,
+                    options=options,
+                    req_tracker=req_tracker,
+                    session=session,
+                    finder=finder,
+                    use_user_site=options.use_user_site,
+                )
+                resolver = self.make_resolver(
+                    preparer=preparer,
+                    finder=finder,
+                    options=options,
+                    wheel_cache=wheel_cache,
+                    use_user_site=options.use_user_site,
+                    ignore_installed=options.ignore_installed,
+                    ignore_requires_python=options.ignore_requires_python,
+                    force_reinstall=options.force_reinstall,
+                    upgrade_strategy=upgrade_strategy,
+                    use_pep517=options.use_pep517,
+                )
+
+                self.trace_basic_info(finder)
+
+                resolver.resolve(requirement_set)
+
+                try:
+                    pip_req = requirement_set.get_requirement("pip")
+                except KeyError:
+                    modifying_pip = None
+                else:
+                    # If we're not replacing an already installed pip,
+                    # we're not modifying it.
+                    modifying_pip = pip_req.satisfied_by is None
+                protect_pip_from_modification_on_windows(
+                    modifying_pip=modifying_pip
+                )
+
+                check_binary_allowed = get_check_binary_allowed(
+                    finder.format_control
+                )
+
+                reqs_to_build = [
+                    r for r in requirement_set.requirements.values()
+                    if should_build_for_install_command(
+                        r, check_binary_allowed
+                    )
+                ]
+
+                _, build_failures = build(
+                    reqs_to_build,
+                    wheel_cache=wheel_cache,
+                    build_options=[],
+                    global_options=[],
+                )
+
+                # If we're using PEP 517, we cannot do a direct install
+                # so we fail here.
+                # We don't care about failures building legacy
+                # requirements, as we'll fall through to a direct
+                # install for those.
+                pep517_build_failures = [
+                    r for r in build_failures if r.use_pep517
+                ]
+                if pep517_build_failures:
+                    raise InstallationError(
+                        "Could not build wheels for {} which use"
+                        " PEP 517 and cannot be installed directly".format(
+                            ", ".join(r.name for r in pep517_build_failures)))
+
+                to_install = resolver.get_installation_order(
+                    requirement_set
+                )
+
+                # Consistency Checking of the package set we're installing.
+                should_warn_about_conflicts = (
+                    not options.ignore_dependencies and
+                    options.warn_about_conflicts
+                )
+                if should_warn_about_conflicts:
+                    self._warn_about_conflicts(to_install)
+
+                # Don't warn about script install locations if
+                # --target has been specified
+                warn_script_location = options.warn_script_location
+                if options.target_dir:
+                    warn_script_location = False
+
+                installed = install_given_reqs(
+                    to_install,
+                    install_options,
+                    global_options,
+                    root=options.root_path,
+                    home=target_temp_dir_path,
+                    prefix=options.prefix_path,
+                    pycompile=options.compile,
+                    warn_script_location=warn_script_location,
+                    use_user_site=options.use_user_site,
+                )
+
+                lib_locations = get_lib_location_guesses(
+                    user=options.use_user_site,
+                    home=target_temp_dir_path,
+                    root=options.root_path,
+                    prefix=options.prefix_path,
+                    isolated=options.isolated_mode,
+                )
+                working_set = pkg_resources.WorkingSet(lib_locations)
+
+                installed.sort(key=operator.attrgetter('name'))
+                items = []
+                for result in installed:
+                    item = result.name
+                    try:
+                        installed_version = get_installed_version(
+                            result.name, working_set=working_set
+                        )
+                        if installed_version:
+                            item += '-' + installed_version
+                    except Exception:
+                        pass
+                    items.append(item)
+                installed_desc = ' '.join(items)
+                if installed_desc:
+                    write_output(
+                        'Successfully installed %s', installed_desc,
+                    )
+            except EnvironmentError as error:
+                show_traceback = (self.verbosity >= 1)
+
+                message = create_env_error_message(
+                    error, show_traceback, options.use_user_site,
+                )
+                logger.error(message, exc_info=show_traceback)
+
+                return ERROR
+            except PreviousBuildDirError:
+                options.no_clean = True
+                raise
+            finally:
+                # Clean up
+                if not options.no_clean:
+                    requirement_set.cleanup_files()
+                    wheel_cache.cleanup()
+
+        if options.target_dir:
+            self._handle_target_dir(
+                options.target_dir, target_temp_dir, options.upgrade
+            )
+
+        return SUCCESS
+
+    def _handle_target_dir(self, target_dir, target_temp_dir, upgrade):
+        ensure_dir(target_dir)
+
+        # Checking both purelib and platlib directories for installed
+        # packages to be moved to target directory
+        lib_dir_list = []
+
+        with target_temp_dir:
+            # Checking both purelib and platlib directories for installed
+            # packages to be moved to target directory
+            scheme = distutils_scheme('', home=target_temp_dir.path)
+            purelib_dir = scheme['purelib']
+            platlib_dir = scheme['platlib']
+            data_dir = scheme['data']
+
+            if os.path.exists(purelib_dir):
+                lib_dir_list.append(purelib_dir)
+            if os.path.exists(platlib_dir) and platlib_dir != purelib_dir:
+                lib_dir_list.append(platlib_dir)
+            if os.path.exists(data_dir):
+                lib_dir_list.append(data_dir)
+
+            for lib_dir in lib_dir_list:
+                for item in os.listdir(lib_dir):
+                    if lib_dir == data_dir:
+                        ddir = os.path.join(data_dir, item)
+                        if any(s.startswith(ddir) for s in lib_dir_list[:-1]):
+                            continue
+                    target_item_dir = os.path.join(target_dir, item)
+                    if os.path.exists(target_item_dir):
+                        if not upgrade:
+                            logger.warning(
+                                'Target directory %s already exists. Specify '
+                                '--upgrade to force replacement.',
+                                target_item_dir
+                            )
+                            continue
+                        if os.path.islink(target_item_dir):
+                            logger.warning(
+                                'Target directory %s already exists and is '
+                                'a link. Pip will not automatically replace '
+                                'links, please remove if replacement is '
+                                'desired.',
+                                target_item_dir
+                            )
+                            continue
+                        if os.path.isdir(target_item_dir):
+                            shutil.rmtree(target_item_dir)
+                        else:
+                            os.remove(target_item_dir)
+
+                    shutil.move(
+                        os.path.join(lib_dir, item),
+                        target_item_dir
+                    )
+
+    def _warn_about_conflicts(self, to_install):
+        try:
+            package_set, _dep_info = check_install_conflicts(to_install)
+        except Exception:
+            logger.error("Error checking for conflicts.", exc_info=True)
+            return
+        missing, conflicting = _dep_info
+
+        # NOTE: There is some duplication here from pip check
+        for project_name in missing:
+            version = package_set[project_name][0]
+            for dependency in missing[project_name]:
+                logger.critical(
+                    "%s %s requires %s, which is not installed.",
+                    project_name, version, dependency[1],
+                )
+
+        for project_name in conflicting:
+            version = package_set[project_name][0]
+            for dep_name, dep_version, req in conflicting[project_name]:
+                logger.critical(
+                    "%s %s has requirement %s, but you'll have %s %s which is "
+                    "incompatible.",
+                    project_name, version, req, dep_name, dep_version,
+                )
+
+
+def get_lib_location_guesses(*args, **kwargs):
+    scheme = distutils_scheme('', *args, **kwargs)
+    return [scheme['purelib'], scheme['platlib']]
+
+
+def site_packages_writable(**kwargs):
+    return all(
+        test_writable_dir(d) for d in set(get_lib_location_guesses(**kwargs))
+    )
+
+
+def decide_user_install(
+    use_user_site,  # type: Optional[bool]
+    prefix_path=None,  # type: Optional[str]
+    target_dir=None,  # type: Optional[str]
+    root_path=None,  # type: Optional[str]
+    isolated_mode=False,  # type: bool
+):
+    # type: (...) -> bool
+    """Determine whether to do a user install based on the input options.
+
+    If use_user_site is False, no additional checks are done.
+    If use_user_site is True, it is checked for compatibility with other
+    options.
+    If use_user_site is None, the default behaviour depends on the environment,
+    which is provided by the other arguments.
+    """
+    # In some cases (config from tox), use_user_site can be set to an integer
+    # rather than a bool, which 'use_user_site is False' wouldn't catch.
+    if (use_user_site is not None) and (not use_user_site):
+        logger.debug("Non-user install by explicit request")
+        return False
+
+    if use_user_site:
+        if prefix_path:
+            raise CommandError(
+                "Can not combine '--user' and '--prefix' as they imply "
+                "different installation locations"
+            )
+        if virtualenv_no_global():
+            raise InstallationError(
+                "Can not perform a '--user' install. User site-packages "
+                "are not visible in this virtualenv."
+            )
+        logger.debug("User install by explicit request")
+        return True
+
+    # If we are here, user installs have not been explicitly requested/avoided
+    assert use_user_site is None
+
+    # user install incompatible with --prefix/--target
+    if prefix_path or target_dir:
+        logger.debug("Non-user install due to --prefix or --target option")
+        return False
+
+    # If user installs are not enabled, choose a non-user install
+    if not site.ENABLE_USER_SITE:
+        logger.debug("Non-user install because user site-packages disabled")
+        return False
+
+    # If we have permission for a non-user install, do that,
+    # otherwise do a user install.
+    if site_packages_writable(root=root_path, isolated=isolated_mode):
+        logger.debug("Non-user install because site-packages writeable")
+        return False
+
+    logger.info("Defaulting to user installation because normal site-packages "
+                "is not writeable")
+    return True
+
+
+def warn_deprecated_install_options(requirement_set, options):
+    # type: (RequirementSet, Optional[List[str]]) -> None
+    """If any location-changing --install-option arguments were passed for
+    requirements or on the command-line, then show a deprecation warning.
+    """
+    def format_options(option_names):
+        # type: (Iterable[str]) -> List[str]
+        return ["--{}".format(name.replace("_", "-")) for name in option_names]
+
+    requirements = (
+        requirement_set.unnamed_requirements +
+        list(requirement_set.requirements.values())
+    )
+
+    offenders = []
+
+    for requirement in requirements:
+        install_options = requirement.options.get("install_options", [])
+        location_options = parse_distutils_args(install_options)
+        if location_options:
+            offenders.append(
+                "{!r} from {}".format(
+                    format_options(location_options.keys()), requirement
+                )
+            )
+
+    if options:
+        location_options = parse_distutils_args(options)
+        if location_options:
+            offenders.append(
+                "{!r} from command line".format(
+                    format_options(location_options.keys())
+                )
+            )
+
+    if not offenders:
+        return
+
+    deprecated(
+        reason=(
+            "Location-changing options found in --install-option: {}. "
+            "This configuration may cause unexpected behavior and is "
+            "unsupported.".format(
+                "; ".join(offenders)
+            )
+        ),
+        replacement=(
+            "using pip-level options like --user, --prefix, --root, and "
+            "--target"
+        ),
+        gone_in="20.2",
+        issue=7309,
+    )
+
+
+def create_env_error_message(error, show_traceback, using_user_site):
+    """Format an error message for an EnvironmentError
+
+    It may occur anytime during the execution of the install command.
+    """
+    parts = []
+
+    # Mention the error if we are not going to show a traceback
+    parts.append("Could not install packages due to an EnvironmentError")
+    if not show_traceback:
+        parts.append(": ")
+        parts.append(str(error))
+    else:
+        parts.append(".")
+
+    # Spilt the error indication from a helper message (if any)
+    parts[-1] += "\n"
+
+    # Suggest useful actions to the user:
+    #  (1) using user site-packages or (2) verifying the permissions
+    if error.errno == errno.EACCES:
+        user_option_part = "Consider using the `--user` option"
+        permissions_part = "Check the permissions"
+
+        if not using_user_site:
+            parts.extend([
+                user_option_part, " or ",
+                permissions_part.lower(),
+            ])
+        else:
+            parts.append(permissions_part)
+        parts.append(".\n")
+
+    return "".join(parts).strip() + "\n"