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Edit File: _metadata.py

# -*- coding: utf-8 -*-

# daemon/_metadata.py
# Part of ‘python-daemon’, an implementation of PEP 3143.
#
# This is free software, and you are welcome to redistribute it under
# certain conditions; see the end of this file for copyright
# information, grant of license, and disclaimer of warranty.

""" Package metadata for the ‘python-daemon’ distribution. """

from __future__ import (absolute_import, unicode_literals)

import datetime
import json

import pkg_resources

__metaclass__ = type

distribution_name = "python-daemon"
version_info_filename = "version_info.json"

def get_distribution(name):
    """ Get the `Distribution` instance for distribution `name`.

:param name: The distribution name for the query.
        :return: The `pkg_resources.Distribution` instance, or
            ``None`` if the distribution instance is not found.
        """
    distribution = None
    try:
        distribution = pkg_resources.get_distribution(name)
    except pkg_resources.DistributionNotFound:
        pass

return distribution

def get_distribution_version_info(
        distribution, filename=version_info_filename):
    """ Get the version info from the installed distribution.

:param distribution: The `pkg_resources.Distribution` instance
            representing the Python package to interrogate.
        :param filename: Base filename of the version info resource.
        :return: The version info as a mapping of fields.

The version info is stored as a metadata file in the
        `distribution`.

If the `distribution` is ``None``, or the version info
        metadata file is not found, the return value mapping fields
        have placeholder values.
        """
    version_info = {
            'release_date': "UNKNOWN",
            'version': "UNKNOWN",
            'maintainer': "UNKNOWN",
            }

if distribution is not None:
        if distribution.has_metadata(filename):
            content = distribution.get_metadata(filename)
            version_info = json.loads(content)

return version_info

distribution = get_distribution(distribution_name)
version_info = get_distribution_version_info(distribution)

version_installed = version_info['version']

author_name = "Ben Finney"
author_email = "ben+python@benfinney.id.au"
author = "{name} <{email}>".format(name=author_name, email=author_email)

class YearRange:
    """ A range of years spanning a period. """

def __init__(self, begin, end=None):
        self.begin = begin
        self.end = end

def __unicode__(self):
        text = "{range.begin:04d}".format(range=self)
        if self.end is not None:
            if self.end > self.begin:
                text = "{range.begin:04d}–{range.end:04d}".format(range=self)
        return text

__str__ = __unicode__

def make_year_range(begin_year, end_date=None):
    """ Construct the year range given a start and possible end date.

:param begin_year: The beginning year (text, 4 digits) for the
            range.
        :param end_date: The end date (text, ISO-8601 format) for the
            range, or a non-date token string.
        :return: The range of years as a `YearRange` instance.

If the `end_date` is not a valid ISO-8601 date string, the
        range has ``None`` for the end year.

"""
    begin_year = int(begin_year)

try:
        end_date = datetime.datetime.strptime(end_date, "%Y-%m-%d")
    except (TypeError, ValueError):
        # Specified end_date value is not a valid date.
        end_year = None
    else:
        end_year = end_date.year

year_range = YearRange(begin=begin_year, end=end_year)

return year_range

copyright_year_begin = "2001"
build_date = version_info['release_date']
copyright_year_range = make_year_range(copyright_year_begin, build_date)

copyright = "Copyright © {year_range} {author} and others".format(
        year_range=copyright_year_range, author=author)
license = "Apache-2"
url = "https://pagure.io/python-daemon/"

# Copyright © 2008–2019 Ben Finney <ben+python@benfinney.id.au>
#
# This is free software: you may copy, modify, and/or distribute this work
# under the terms of the Apache License, version 2.0 as published by the
# Apache Software Foundation.
# No warranty expressed or implied. See the file ‘LICENSE.ASF-2’ for details.

# Local variables:
# coding: utf-8
# mode: python
# End:
# vim: fileencoding=utf-8 filetype=python :