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_metadata.py
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# -*- 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 :