Revert "Restructuring Finalized for App Bundling"

This reverts commit 7af3526e105cc330422f8742ec5edec1c4a0a98f.

1 files changed, 913 insertions, 0 deletions

diff --git a/src/main/python/venv/Lib/site-packages/pylint/config.py b/src/main/python/venv/Lib/site-packages/pylint/config.py
new file mode 100644
index 0000000..0925575
--- /dev/null
+++ b/src/main/python/venv/Lib/site-packages/pylint/config.py
@@ -0,0 +1,913 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2006-2010, 2012-2014 LOGILAB S.A. (Paris, FRANCE) <contact@logilab.fr>
+# Copyright (c) 2008 pyves@crater.logilab.fr <pyves@crater.logilab.fr>
+# Copyright (c) 2010 Julien Jehannet <julien.jehannet@logilab.fr>
+# Copyright (c) 2013 Google, Inc.
+# Copyright (c) 2013 John McGehee <jmcgehee@altera.com>
+# Copyright (c) 2014-2018 Claudiu Popa <pcmanticore@gmail.com>
+# Copyright (c) 2014 Brett Cannon <brett@python.org>
+# Copyright (c) 2014 Arun Persaud <arun@nubati.net>
+# Copyright (c) 2015 Aru Sahni <arusahni@gmail.com>
+# Copyright (c) 2015 John Kirkham <jakirkham@gmail.com>
+# Copyright (c) 2015 Ionel Cristian Maries <contact@ionelmc.ro>
+# Copyright (c) 2016 Erik <erik.eriksson@yahoo.com>
+# Copyright (c) 2016 Alexander Todorov <atodorov@otb.bg>
+# Copyright (c) 2016 Moises Lopez <moylop260@vauxoo.com>
+# Copyright (c) 2017-2018 Ville Skyttä <ville.skytta@iki.fi>
+# Copyright (c) 2017 hippo91 <guillaume.peillex@gmail.com>
+# Copyright (c) 2017 ahirnish <ahirnish@gmail.com>
+# Copyright (c) 2017 Łukasz Rogalski <rogalski.91@gmail.com>
+# Copyright (c) 2018 Bryce Guinta <bryce.paul.guinta@gmail.com>
+# Copyright (c) 2018 ssolanki <sushobhitsolanki@gmail.com>
+# Copyright (c) 2018 Sushobhit <31987769+sushobhit27@users.noreply.github.com>
+# Copyright (c) 2018 Anthony Sottile <asottile@umich.edu>
+# Copyright (c) 2018 Gary Tyler McLeod <mail@garytyler.com>
+# Copyright (c) 2018 Konstantin <Github@pheanex.de>
+# Copyright (c) 2018 Nick Drozd <nicholasdrozd@gmail.com>
+
+# Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+# For details: https://github.com/PyCQA/pylint/blob/master/COPYING
+
+"""utilities for Pylint configuration :
+
+* pylintrc
+* pylint.d (PYLINTHOME)
+"""
+import collections
+import configparser
+import contextlib
+import copy
+import io
+import optparse
+import os
+import pickle
+import re
+import sys
+import time
+from typing import Any, Dict, Tuple
+
+from pylint import utils
+
+USER_HOME = os.path.expanduser("~")
+if "PYLINTHOME" in os.environ:
+    PYLINT_HOME = os.environ["PYLINTHOME"]
+    if USER_HOME == "~":
+        USER_HOME = os.path.dirname(PYLINT_HOME)
+elif USER_HOME == "~":
+    PYLINT_HOME = ".pylint.d"
+else:
+    PYLINT_HOME = os.path.join(USER_HOME, ".pylint.d")
+
+
+def _get_pdata_path(base_name, recurs):
+    base_name = base_name.replace(os.sep, "_")
+    return os.path.join(PYLINT_HOME, "%s%s%s" % (base_name, recurs, ".stats"))
+
+
+def load_results(base):
+    data_file = _get_pdata_path(base, 1)
+    try:
+        with open(data_file, "rb") as stream:
+            return pickle.load(stream)
+    except Exception:  # pylint: disable=broad-except
+        return {}
+
+
+def save_results(results, base):
+    if not os.path.exists(PYLINT_HOME):
+        try:
+            os.mkdir(PYLINT_HOME)
+        except OSError:
+            print("Unable to create directory %s" % PYLINT_HOME, file=sys.stderr)
+    data_file = _get_pdata_path(base, 1)
+    try:
+        with open(data_file, "wb") as stream:
+            pickle.dump(results, stream)
+    except (IOError, OSError) as ex:
+        print("Unable to create file %s: %s" % (data_file, ex), file=sys.stderr)
+
+
+def find_pylintrc():
+    """search the pylint rc file and return its path if it find it, else None
+    """
+    # is there a pylint rc file in the current directory ?
+    if os.path.exists("pylintrc"):
+        return os.path.abspath("pylintrc")
+    if os.path.exists(".pylintrc"):
+        return os.path.abspath(".pylintrc")
+    if os.path.isfile("__init__.py"):
+        curdir = os.path.abspath(os.getcwd())
+        while os.path.isfile(os.path.join(curdir, "__init__.py")):
+            curdir = os.path.abspath(os.path.join(curdir, ".."))
+            if os.path.isfile(os.path.join(curdir, "pylintrc")):
+                return os.path.join(curdir, "pylintrc")
+            if os.path.isfile(os.path.join(curdir, ".pylintrc")):
+                return os.path.join(curdir, ".pylintrc")
+    if "PYLINTRC" in os.environ and os.path.exists(os.environ["PYLINTRC"]):
+        pylintrc = os.environ["PYLINTRC"]
+    else:
+        user_home = os.path.expanduser("~")
+        if user_home in ("~", "/root"):
+            pylintrc = ".pylintrc"
+        else:
+            pylintrc = os.path.join(user_home, ".pylintrc")
+            if not os.path.isfile(pylintrc):
+                pylintrc = os.path.join(user_home, ".config", "pylintrc")
+    if not os.path.isfile(pylintrc):
+        if os.path.isfile("/etc/pylintrc"):
+            pylintrc = "/etc/pylintrc"
+        else:
+            pylintrc = None
+    return pylintrc
+
+
+PYLINTRC = find_pylintrc()
+
+ENV_HELP = (
+    """
+The following environment variables are used:
+    * PYLINTHOME
+    Path to the directory where persistent data for the run will be stored. If
+not found, it defaults to ~/.pylint.d/ or .pylint.d (in the current working
+directory).
+    * PYLINTRC
+    Path to the configuration file. See the documentation for the method used
+to search for configuration file.
+"""
+    % globals()  # type: ignore
+)
+
+
+class UnsupportedAction(Exception):
+    """raised by set_option when it doesn't know what to do for an action"""
+
+
+def _multiple_choice_validator(choices, name, value):
+    values = utils._check_csv(value)
+    for csv_value in values:
+        if csv_value not in choices:
+            msg = "option %s: invalid value: %r, should be in %s"
+            raise optparse.OptionValueError(msg % (name, csv_value, choices))
+    return values
+
+
+def _choice_validator(choices, name, value):
+    if value not in choices:
+        msg = "option %s: invalid value: %r, should be in %s"
+        raise optparse.OptionValueError(msg % (name, value, choices))
+    return value
+
+
+# pylint: disable=unused-argument
+def _csv_validator(_, name, value):
+    return utils._check_csv(value)
+
+
+# pylint: disable=unused-argument
+def _regexp_validator(_, name, value):
+    if hasattr(value, "pattern"):
+        return value
+    return re.compile(value)
+
+
+# pylint: disable=unused-argument
+def _regexp_csv_validator(_, name, value):
+    return [_regexp_validator(_, name, val) for val in _csv_validator(_, name, value)]
+
+
+def _yn_validator(opt, _, value):
+    if isinstance(value, int):
+        return bool(value)
+    if value in ("y", "yes"):
+        return True
+    if value in ("n", "no"):
+        return False
+    msg = "option %s: invalid yn value %r, should be in (y, yes, n, no)"
+    raise optparse.OptionValueError(msg % (opt, value))
+
+
+def _non_empty_string_validator(opt, _, value):
+    if not value:
+        msg = "indent string can't be empty."
+        raise optparse.OptionValueError(msg)
+    return utils._unquote(value)
+
+
+VALIDATORS = {
+    "string": utils._unquote,
+    "int": int,
+    "regexp": re.compile,
+    "regexp_csv": _regexp_csv_validator,
+    "csv": _csv_validator,
+    "yn": _yn_validator,
+    "choice": lambda opt, name, value: _choice_validator(opt["choices"], name, value),
+    "multiple_choice": lambda opt, name, value: _multiple_choice_validator(
+        opt["choices"], name, value
+    ),
+    "non_empty_string": _non_empty_string_validator,
+}
+
+
+def _call_validator(opttype, optdict, option, value):
+    if opttype not in VALIDATORS:
+        raise Exception('Unsupported type "%s"' % opttype)
+    try:
+        return VALIDATORS[opttype](optdict, option, value)
+    except TypeError:
+        try:
+            return VALIDATORS[opttype](value)
+        except Exception:
+            raise optparse.OptionValueError(
+                "%s value (%r) should be of type %s" % (option, value, opttype)
+            )
+
+
+def _validate(value, optdict, name=""):
+    """return a validated value for an option according to its type
+
+    optional argument name is only used for error message formatting
+    """
+    try:
+        _type = optdict["type"]
+    except KeyError:
+        return value
+    return _call_validator(_type, optdict, name, value)
+
+
+def _level_options(group, outputlevel):
+    return [
+        option
+        for option in group.option_list
+        if (getattr(option, "level", 0) or 0) <= outputlevel
+        and option.help is not optparse.SUPPRESS_HELP
+    ]
+
+
+def _expand_default(self, option):
+    """Patch OptionParser.expand_default with custom behaviour
+
+    This will handle defaults to avoid overriding values in the
+    configuration file.
+    """
+    if self.parser is None or not self.default_tag:
+        return option.help
+    optname = option._long_opts[0][2:]
+    try:
+        provider = self.parser.options_manager._all_options[optname]
+    except KeyError:
+        value = None
+    else:
+        optdict = provider.get_option_def(optname)
+        optname = provider.option_attrname(optname, optdict)
+        value = getattr(provider.config, optname, optdict)
+        value = utils._format_option_value(optdict, value)
+    if value is optparse.NO_DEFAULT or not value:
+        value = self.NO_DEFAULT_VALUE
+    return option.help.replace(self.default_tag, str(value))
+
+
+@contextlib.contextmanager
+def _patch_optparse():
+    orig_default = optparse.HelpFormatter
+    try:
+        optparse.HelpFormatter.expand_default = _expand_default
+        yield
+    finally:
+        optparse.HelpFormatter.expand_default = orig_default
+
+
+def _multiple_choices_validating_option(opt, name, value):
+    return _multiple_choice_validator(opt.choices, name, value)
+
+
+# pylint: disable=no-member
+class Option(optparse.Option):
+    TYPES = optparse.Option.TYPES + (
+        "regexp",
+        "regexp_csv",
+        "csv",
+        "yn",
+        "multiple_choice",
+        "non_empty_string",
+    )
+    ATTRS = optparse.Option.ATTRS + ["hide", "level"]
+    TYPE_CHECKER = copy.copy(optparse.Option.TYPE_CHECKER)
+    TYPE_CHECKER["regexp"] = _regexp_validator
+    TYPE_CHECKER["regexp_csv"] = _regexp_csv_validator
+    TYPE_CHECKER["csv"] = _csv_validator
+    TYPE_CHECKER["yn"] = _yn_validator
+    TYPE_CHECKER["multiple_choice"] = _multiple_choices_validating_option
+    TYPE_CHECKER["non_empty_string"] = _non_empty_string_validator
+
+    def __init__(self, *opts, **attrs):
+        optparse.Option.__init__(self, *opts, **attrs)
+        if hasattr(self, "hide") and self.hide:
+            self.help = optparse.SUPPRESS_HELP
+
+    def _check_choice(self):
+        if self.type in ("choice", "multiple_choice"):
+            if self.choices is None:
+                raise optparse.OptionError(
+                    "must supply a list of choices for type 'choice'", self
+                )
+            if not isinstance(self.choices, (tuple, list)):
+                raise optparse.OptionError(
+                    "choices must be a list of strings ('%s' supplied)"
+                    % str(type(self.choices)).split("'")[1],
+                    self,
+                )
+        elif self.choices is not None:
+            raise optparse.OptionError(
+                "must not supply choices for type %r" % self.type, self
+            )
+
+    # pylint: disable=unsupported-assignment-operation
+    optparse.Option.CHECK_METHODS[2] = _check_choice  # type: ignore
+
+    def process(self, opt, value, values, parser):
+        # First, convert the value(s) to the right type.  Howl if any
+        # value(s) are bogus.
+        value = self.convert_value(opt, value)
+        if self.type == "named":
+            existent = getattr(values, self.dest)
+            if existent:
+                existent.update(value)
+                value = existent
+        # And then take whatever action is expected of us.
+        # This is a separate method to make life easier for
+        # subclasses to add new actions.
+        return self.take_action(self.action, self.dest, opt, value, values, parser)
+
+
+class OptionParser(optparse.OptionParser):
+    def __init__(self, option_class, *args, **kwargs):
+        optparse.OptionParser.__init__(self, option_class=Option, *args, **kwargs)
+
+    def format_option_help(self, formatter=None):
+        if formatter is None:
+            formatter = self.formatter
+        outputlevel = getattr(formatter, "output_level", 0)
+        formatter.store_option_strings(self)
+        result = []
+        result.append(formatter.format_heading("Options"))
+        formatter.indent()
+        if self.option_list:
+            result.append(optparse.OptionContainer.format_option_help(self, formatter))
+            result.append("\n")
+        for group in self.option_groups:
+            if group.level <= outputlevel and (
+                group.description or _level_options(group, outputlevel)
+            ):
+                result.append(group.format_help(formatter))
+                result.append("\n")
+        formatter.dedent()
+        # Drop the last "\n", or the header if no options or option groups:
+        return "".join(result[:-1])
+
+    def _match_long_opt(self, opt):
+        """Disable abbreviations."""
+        if opt not in self._long_opt:
+            raise optparse.BadOptionError(opt)
+        return opt
+
+
+# pylint: disable=abstract-method; by design?
+class _ManHelpFormatter(optparse.HelpFormatter):
+    def __init__(
+        self, indent_increment=0, max_help_position=24, width=79, short_first=0
+    ):
+        optparse.HelpFormatter.__init__(
+            self, indent_increment, max_help_position, width, short_first
+        )
+
+    def format_heading(self, heading):
+        return ".SH %s\n" % heading.upper()
+
+    def format_description(self, description):
+        return description
+
+    def format_option(self, option):
+        try:
+            optstring = option.option_strings
+        except AttributeError:
+            optstring = self.format_option_strings(option)
+        if option.help:
+            help_text = self.expand_default(option)
+            help_string = " ".join([l.strip() for l in help_text.splitlines()])
+            help_string = help_string.replace("\\", "\\\\")
+            help_string = help_string.replace("[current:", "[default:")
+        else:
+            help_string = ""
+        return """.IP "%s"
+%s
+""" % (
+            optstring,
+            help_string,
+        )
+
+    def format_head(self, optparser, pkginfo, section=1):
+        long_desc = ""
+        try:
+            pgm = optparser._get_prog_name()
+        except AttributeError:
+            # py >= 2.4.X (dunno which X exactly, at least 2)
+            pgm = optparser.get_prog_name()
+        short_desc = self.format_short_description(pgm, pkginfo.description)
+        if hasattr(pkginfo, "long_desc"):
+            long_desc = self.format_long_description(pgm, pkginfo.long_desc)
+        return "%s\n%s\n%s\n%s" % (
+            self.format_title(pgm, section),
+            short_desc,
+            self.format_synopsis(pgm),
+            long_desc,
+        )
+
+    @staticmethod
+    def format_title(pgm, section):
+        date = "%d-%02d-%02d" % time.localtime()[:3]
+        return '.TH %s %s "%s" %s' % (pgm, section, date, pgm)
+
+    @staticmethod
+    def format_short_description(pgm, short_desc):
+        return """.SH NAME
+.B %s
+\\- %s
+""" % (
+            pgm,
+            short_desc.strip(),
+        )
+
+    @staticmethod
+    def format_synopsis(pgm):
+        return (
+            """.SH SYNOPSIS
+.B  %s
+[
+.I OPTIONS
+] [
+.I <arguments>
+]
+"""
+            % pgm
+        )
+
+    @staticmethod
+    def format_long_description(pgm, long_desc):
+        long_desc = "\n".join(line.lstrip() for line in long_desc.splitlines())
+        long_desc = long_desc.replace("\n.\n", "\n\n")
+        if long_desc.lower().startswith(pgm):
+            long_desc = long_desc[len(pgm) :]
+        return """.SH DESCRIPTION
+.B %s
+%s
+""" % (
+            pgm,
+            long_desc.strip(),
+        )
+
+    @staticmethod
+    def format_tail(pkginfo):
+        tail = """.SH SEE ALSO
+/usr/share/doc/pythonX.Y-%s/
+
+.SH BUGS
+Please report bugs on the project\'s mailing list:
+%s
+
+.SH AUTHOR
+%s <%s>
+""" % (
+            getattr(pkginfo, "debian_name", pkginfo.modname),
+            pkginfo.mailinglist,
+            pkginfo.author,
+            pkginfo.author_email,
+        )
+
+        if hasattr(pkginfo, "copyright"):
+            tail += (
+                """
+.SH COPYRIGHT
+%s
+"""
+                % pkginfo.copyright
+            )
+
+        return tail
+
+
+class OptionsManagerMixIn:
+    """Handle configuration from both a configuration file and command line options"""
+
+    def __init__(self, usage, config_file=None, version=None):
+        self.config_file = config_file
+        self.reset_parsers(usage, version=version)
+        # list of registered options providers
+        self.options_providers = []
+        # dictionary associating option name to checker
+        self._all_options = collections.OrderedDict()
+        self._short_options = {}
+        self._nocallback_options = {}
+        self._mygroups = {}
+        # verbosity
+        self._maxlevel = 0
+
+    def reset_parsers(self, usage="", version=None):
+        # configuration file parser
+        self.cfgfile_parser = configparser.ConfigParser(
+            inline_comment_prefixes=("#", ";")
+        )
+        # command line parser
+        self.cmdline_parser = OptionParser(Option, usage=usage, version=version)
+        self.cmdline_parser.options_manager = self
+        self._optik_option_attrs = set(self.cmdline_parser.option_class.ATTRS)
+
+    def register_options_provider(self, provider, own_group=True):
+        """register an options provider"""
+        assert provider.priority <= 0, "provider's priority can't be >= 0"
+        for i in range(len(self.options_providers)):
+            if provider.priority > self.options_providers[i].priority:
+                self.options_providers.insert(i, provider)
+                break
+        else:
+            self.options_providers.append(provider)
+        non_group_spec_options = [
+            option for option in provider.options if "group" not in option[1]
+        ]
+        groups = getattr(provider, "option_groups", ())
+        if own_group and non_group_spec_options:
+            self.add_option_group(
+                provider.name.upper(),
+                provider.__doc__,
+                non_group_spec_options,
+                provider,
+            )
+        else:
+            for opt, optdict in non_group_spec_options:
+                self.add_optik_option(provider, self.cmdline_parser, opt, optdict)
+        for gname, gdoc in groups:
+            gname = gname.upper()
+            goptions = [
+                option
+                for option in provider.options
+                if option[1].get("group", "").upper() == gname
+            ]
+            self.add_option_group(gname, gdoc, goptions, provider)
+
+    def add_option_group(self, group_name, _, options, provider):
+        # add option group to the command line parser
+        if group_name in self._mygroups:
+            group = self._mygroups[group_name]
+        else:
+            group = optparse.OptionGroup(
+                self.cmdline_parser, title=group_name.capitalize()
+            )
+            self.cmdline_parser.add_option_group(group)
+            group.level = provider.level
+            self._mygroups[group_name] = group
+            # add section to the config file
+            if (
+                group_name != "DEFAULT"
+                and group_name not in self.cfgfile_parser._sections
+            ):
+                self.cfgfile_parser.add_section(group_name)
+        # add provider's specific options
+        for opt, optdict in options:
+            self.add_optik_option(provider, group, opt, optdict)
+
+    def add_optik_option(self, provider, optikcontainer, opt, optdict):
+        args, optdict = self.optik_option(provider, opt, optdict)
+        option = optikcontainer.add_option(*args, **optdict)
+        self._all_options[opt] = provider
+        self._maxlevel = max(self._maxlevel, option.level or 0)
+
+    def optik_option(self, provider, opt, optdict):
+        """get our personal option definition and return a suitable form for
+        use with optik/optparse
+        """
+        optdict = copy.copy(optdict)
+        if "action" in optdict:
+            self._nocallback_options[provider] = opt
+        else:
+            optdict["action"] = "callback"
+            optdict["callback"] = self.cb_set_provider_option
+        # default is handled here and *must not* be given to optik if you
+        # want the whole machinery to work
+        if "default" in optdict:
+            if (
+                "help" in optdict
+                and optdict.get("default") is not None
+                and optdict["action"] not in ("store_true", "store_false")
+            ):
+                optdict["help"] += " [current: %default]"
+            del optdict["default"]
+        args = ["--" + str(opt)]
+        if "short" in optdict:
+            self._short_options[optdict["short"]] = opt
+            args.append("-" + optdict["short"])
+            del optdict["short"]
+        # cleanup option definition dict before giving it to optik
+        for key in list(optdict.keys()):
+            if key not in self._optik_option_attrs:
+                optdict.pop(key)
+        return args, optdict
+
+    def cb_set_provider_option(self, option, opt, value, parser):
+        """optik callback for option setting"""
+        if opt.startswith("--"):
+            # remove -- on long option
+            opt = opt[2:]
+        else:
+            # short option, get its long equivalent
+            opt = self._short_options[opt[1:]]
+        # trick since we can't set action='store_true' on options
+        if value is None:
+            value = 1
+        self.global_set_option(opt, value)
+
+    def global_set_option(self, opt, value):
+        """set option on the correct option provider"""
+        self._all_options[opt].set_option(opt, value)
+
+    def generate_config(self, stream=None, skipsections=(), encoding=None):
+        """write a configuration file according to the current configuration
+        into the given stream or stdout
+        """
+        options_by_section = {}
+        sections = []
+        for provider in self.options_providers:
+            for section, options in provider.options_by_section():
+                if section is None:
+                    section = provider.name
+                if section in skipsections:
+                    continue
+                options = [
+                    (n, d, v)
+                    for (n, d, v) in options
+                    if d.get("type") is not None and not d.get("deprecated")
+                ]
+                if not options:
+                    continue
+                if section not in sections:
+                    sections.append(section)
+                alloptions = options_by_section.setdefault(section, [])
+                alloptions += options
+        stream = stream or sys.stdout
+        printed = False
+        for section in sections:
+            if printed:
+                print("\n", file=stream)
+            utils.format_section(
+                stream, section.upper(), sorted(options_by_section[section])
+            )
+            printed = True
+
+    def generate_manpage(self, pkginfo, section=1, stream=None):
+        with _patch_optparse():
+            _generate_manpage(
+                self.cmdline_parser,
+                pkginfo,
+                section,
+                stream=stream or sys.stdout,
+                level=self._maxlevel,
+            )
+
+    def load_provider_defaults(self):
+        """initialize configuration using default values"""
+        for provider in self.options_providers:
+            provider.load_defaults()
+
+    def read_config_file(self, config_file=None, verbose=None):
+        """read the configuration file but do not load it (i.e. dispatching
+        values to each options provider)
+        """
+        helplevel = 1
+        while helplevel <= self._maxlevel:
+            opt = "-".join(["long"] * helplevel) + "-help"
+            if opt in self._all_options:
+                break  # already processed
+            # pylint: disable=unused-argument
+            def helpfunc(option, opt, val, p, level=helplevel):
+                print(self.help(level))
+                sys.exit(0)
+
+            helpmsg = "%s verbose help." % " ".join(["more"] * helplevel)
+            optdict = {"action": "callback", "callback": helpfunc, "help": helpmsg}
+            provider = self.options_providers[0]
+            self.add_optik_option(provider, self.cmdline_parser, opt, optdict)
+            provider.options += ((opt, optdict),)
+            helplevel += 1
+        if config_file is None:
+            config_file = self.config_file
+        if config_file is not None:
+            config_file = os.path.expanduser(config_file)
+            if not os.path.exists(config_file):
+                raise IOError("The config file {:s} doesn't exist!".format(config_file))
+
+        use_config_file = config_file and os.path.exists(config_file)
+        if use_config_file:
+            parser = self.cfgfile_parser
+
+            # Use this encoding in order to strip the BOM marker, if any.
+            with io.open(config_file, "r", encoding="utf_8_sig") as fp:
+                parser.read_file(fp)
+
+            # normalize sections'title
+            for sect, values in list(parser._sections.items()):
+                if not sect.isupper() and values:
+                    parser._sections[sect.upper()] = values
+
+        if not verbose:
+            return
+
+        if use_config_file:
+            msg = "Using config file {}".format(os.path.abspath(config_file))
+        else:
+            msg = "No config file found, using default configuration"
+        print(msg, file=sys.stderr)
+
+    def load_config_file(self):
+        """dispatch values previously read from a configuration file to each
+        options provider)
+        """
+        parser = self.cfgfile_parser
+        for section in parser.sections():
+            for option, value in parser.items(section):
+                try:
+                    self.global_set_option(option, value)
+                except (KeyError, optparse.OptionError):
+                    continue
+
+    def load_configuration(self, **kwargs):
+        """override configuration according to given parameters"""
+        return self.load_configuration_from_config(kwargs)
+
+    def load_configuration_from_config(self, config):
+        for opt, opt_value in config.items():
+            opt = opt.replace("_", "-")
+            provider = self._all_options[opt]
+            provider.set_option(opt, opt_value)
+
+    def load_command_line_configuration(self, args=None):
+        """Override configuration according to command line parameters
+
+        return additional arguments
+        """
+        with _patch_optparse():
+            if args is None:
+                args = sys.argv[1:]
+            else:
+                args = list(args)
+            (options, args) = self.cmdline_parser.parse_args(args=args)
+            for provider in self._nocallback_options:
+                config = provider.config
+                for attr in config.__dict__.keys():
+                    value = getattr(options, attr, None)
+                    if value is None:
+                        continue
+                    setattr(config, attr, value)
+            return args
+
+    def add_help_section(self, title, description, level=0):
+        """add a dummy option section for help purpose """
+        group = optparse.OptionGroup(
+            self.cmdline_parser, title=title.capitalize(), description=description
+        )
+        group.level = level
+        self._maxlevel = max(self._maxlevel, level)
+        self.cmdline_parser.add_option_group(group)
+
+    def help(self, level=0):
+        """return the usage string for available options """
+        self.cmdline_parser.formatter.output_level = level
+        with _patch_optparse():
+            return self.cmdline_parser.format_help()
+
+
+class OptionsProviderMixIn:
+    """Mixin to provide options to an OptionsManager"""
+
+    # those attributes should be overridden
+    priority = -1
+    name = "default"
+    options = ()  # type: Tuple[Tuple[str, Dict[str, Any]], ...]
+    level = 0
+
+    def __init__(self):
+        self.config = optparse.Values()
+        self.load_defaults()
+
+    def load_defaults(self):
+        """initialize the provider using default values"""
+        for opt, optdict in self.options:
+            action = optdict.get("action")
+            if action != "callback":
+                # callback action have no default
+                if optdict is None:
+                    optdict = self.get_option_def(opt)
+                default = optdict.get("default")
+                self.set_option(opt, default, action, optdict)
+
+    def option_attrname(self, opt, optdict=None):
+        """get the config attribute corresponding to opt"""
+        if optdict is None:
+            optdict = self.get_option_def(opt)
+        return optdict.get("dest", opt.replace("-", "_"))
+
+    def option_value(self, opt):
+        """get the current value for the given option"""
+        return getattr(self.config, self.option_attrname(opt), None)
+
+    def set_option(self, optname, value, action=None, optdict=None):
+        """method called to set an option (registered in the options list)"""
+        if optdict is None:
+            optdict = self.get_option_def(optname)
+        if value is not None:
+            value = _validate(value, optdict, optname)
+        if action is None:
+            action = optdict.get("action", "store")
+        if action == "store":
+            setattr(self.config, self.option_attrname(optname, optdict), value)
+        elif action in ("store_true", "count"):
+            setattr(self.config, self.option_attrname(optname, optdict), 0)
+        elif action == "store_false":
+            setattr(self.config, self.option_attrname(optname, optdict), 1)
+        elif action == "append":
+            optname = self.option_attrname(optname, optdict)
+            _list = getattr(self.config, optname, None)
+            if _list is None:
+                if isinstance(value, (list, tuple)):
+                    _list = value
+                elif value is not None:
+                    _list = []
+                    _list.append(value)
+                setattr(self.config, optname, _list)
+            elif isinstance(_list, tuple):
+                setattr(self.config, optname, _list + (value,))
+            else:
+                _list.append(value)
+        elif action == "callback":
+            optdict["callback"](None, optname, value, None)
+        else:
+            raise UnsupportedAction(action)
+
+    def get_option_def(self, opt):
+        """return the dictionary defining an option given its name"""
+        assert self.options
+        for option in self.options:
+            if option[0] == opt:
+                return option[1]
+        raise optparse.OptionError(
+            "no such option %s in section %r" % (opt, self.name), opt
+        )
+
+    def options_by_section(self):
+        """return an iterator on options grouped by section
+
+        (section, [list of (optname, optdict, optvalue)])
+        """
+        sections = {}
+        for optname, optdict in self.options:
+            sections.setdefault(optdict.get("group"), []).append(
+                (optname, optdict, self.option_value(optname))
+            )
+        if None in sections:
+            yield None, sections.pop(None)
+        for section, options in sorted(sections.items()):
+            yield section.upper(), options
+
+    def options_and_values(self, options=None):
+        if options is None:
+            options = self.options
+        for optname, optdict in options:
+            yield (optname, optdict, self.option_value(optname))
+
+
+class ConfigurationMixIn(OptionsManagerMixIn, OptionsProviderMixIn):
+    """basic mixin for simple configurations which don't need the
+    manager / providers model
+    """
+
+    def __init__(self, *args, **kwargs):
+        if not args:
+            kwargs.setdefault("usage", "")
+        OptionsManagerMixIn.__init__(self, *args, **kwargs)
+        OptionsProviderMixIn.__init__(self)
+        if not getattr(self, "option_groups", None):
+            self.option_groups = []
+            for _, optdict in self.options:
+                try:
+                    gdef = (optdict["group"].upper(), "")
+                except KeyError:
+                    continue
+                if gdef not in self.option_groups:
+                    self.option_groups.append(gdef)
+        self.register_options_provider(self, own_group=False)
+
+
+def _generate_manpage(optparser, pkginfo, section=1, stream=sys.stdout, level=0):
+    formatter = _ManHelpFormatter()
+    formatter.output_level = level
+    formatter.parser = optparser
+    print(formatter.format_head(optparser, pkginfo, section), file=stream)
+    print(optparser.format_option_help(formatter), file=stream)
+    print(formatter.format_tail(pkginfo), file=stream)