dev-python/python-dateutil: Use system tzdata correctly

Closes: https://bugs.gentoo.org/652226

dev-python/python-dateutil/files/0001-zoneinfo-Get-timezone-data-from-system-tzdata.patch

@@ -0,0 +1,104 @@
+From f48e70ae846c161dfbfe6ddb36e4bcad4427ac8c Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <[email protected]>
+Date: Tue, 3 Apr 2018 22:03:32 +0200
+Subject: [PATCH] zoneinfo: Get timezone data from system tzdata
+
+---
+ dateutil/test/test_imports.py |  3 +--
+ dateutil/zoneinfo/__init__.py | 25 ++++++++++++++-----------
+ 2 files changed, 15 insertions(+), 13 deletions(-)
+
+diff --git a/dateutil/test/test_imports.py b/dateutil/test/test_imports.py
+index 2a19b62..97d07e4 100644
+--- a/dateutil/test/test_imports.py
++++ b/dateutil/test/test_imports.py
+@@ -158,9 +158,8 @@ class ImportZoneInfoTest(unittest.TestCase):
+     def testZoneinfoStar(self):
+         from dateutil.zoneinfo import gettz
+         from dateutil.zoneinfo import gettz_db_metadata
+-        from dateutil.zoneinfo import rebuild
+
+-        zi_all = (gettz, gettz_db_metadata, rebuild)
++        zi_all = (gettz, gettz_db_metadata)
+
+         for var in zi_all:
+             self.assertIsNot(var, None)
+diff --git a/dateutil/zoneinfo/__init__.py b/dateutil/zoneinfo/__init__.py
+index 34f11ad..e9870ca 100644
+--- a/dateutil/zoneinfo/__init__.py
++++ b/dateutil/zoneinfo/__init__.py
+@@ -1,6 +1,7 @@
+ # -*- coding: utf-8 -*-
+ import warnings
+ import json
++import os
+
+ from tarfile import TarFile
+ from pkgutil import get_data
+@@ -10,7 +11,7 @@ from dateutil.tz import tzfile as _tzfile
+
+ __all__ = ["get_zonefile_instance", "gettz", "gettz_db_metadata"]
+
+-ZONEFILENAME = "dateutil-zoneinfo.tar.gz"
++ZONEDIRECTORY = "/usr/share/zoneinfo"
+ METADATA_FN = 'METADATA'
+
+
+@@ -19,12 +20,14 @@ class tzfile(_tzfile):
+         return (gettz, (self._filename,))
+
+
+-def getzoneinfofile_stream():
+-    try:
+-        return BytesIO(get_data(__name__, ZONEFILENAME))
+-    except IOError as e:  # TODO  switch to FileNotFoundError?
+-        warnings.warn("I/O error({0}): {1}".format(e.errno, e.strerror))
+-        return None
++def iter_zones(topdir):
++    for dirpath, dirnames, filenames in os.walk(topdir):
++        for f in filenames:
++            if f.endswith('.tab'):
++                continue
++            fpath = os.path.join(dirpath, f)
++            relpath = os.path.relpath(fpath, topdir)
++            yield (relpath, tzfile(fpath, filename=relpath))
+
+
+ class ZoneInfoFile(object):
+@@ -48,7 +51,7 @@ class ZoneInfoFile(object):
+                     # no metadata in tar file
+                     self.metadata = None
+         else:
+-            self.zones = {}
++            self.zones = dict(iter_zones(ZONEDIRECTORY))
+             self.metadata = None
+
+     def get(self, name, default=None):
+@@ -99,7 +102,7 @@ def get_zonefile_instance(new_instance=False):
+         zif = getattr(get_zonefile_instance, '_cached_instance', None)
+
+     if zif is None:
+-        zif = ZoneInfoFile(getzoneinfofile_stream())
++        zif = ZoneInfoFile()
+
+         get_zonefile_instance._cached_instance = zif
+
+@@ -140,7 +143,7 @@ def gettz(name):
+                   DeprecationWarning)
+
+     if len(_CLASS_ZONE_INSTANCE) == 0:
+-        _CLASS_ZONE_INSTANCE.append(ZoneInfoFile(getzoneinfofile_stream()))
++        _CLASS_ZONE_INSTANCE.append(ZoneInfoFile())
+     return _CLASS_ZONE_INSTANCE[0].zones.get(name)
+
+
+@@ -163,5 +166,5 @@ def gettz_db_metadata():
+                   DeprecationWarning)
+
+     if len(_CLASS_ZONE_INSTANCE) == 0:
+-        _CLASS_ZONE_INSTANCE.append(ZoneInfoFile(getzoneinfofile_stream()))
++        _CLASS_ZONE_INSTANCE.append(ZoneInfoFile())
+     return _CLASS_ZONE_INSTANCE[0].metadata
+-- 
+2.17.0
+

dev-python/python-dateutil/python-dateutil-2.7.2-r1.ebuild

@@ -0,0 +1,49 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+PYTHON_COMPAT=( python2_7 python3_{4,5,6} pypy pypy3 )
+
+inherit distutils-r1
+
+DESCRIPTION="Extensions to the standard Python datetime module"
+HOMEPAGE="
+	https://dateutil.readthedocs.org/
+	https://pypi.org/project/python-dateutil
+	https://github.com/dateutil/dateutil/
+"
+SRC_URI="mirror://pypi/${PN:0:1}/${PN}/${P}.tar.gz"
+
+LICENSE="BSD"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
+IUSE="test"
+
+RDEPEND="
+	>=dev-python/six-1.5[${PYTHON_USEDEP}]
+	sys-libs/timezone-data
+"
+DEPEND="${RDEPEND}
+	dev-python/setuptools_scm[${PYTHON_USEDEP}]
+	dev-python/setuptools[${PYTHON_USEDEP}]
+	test? (
+		dev-python/pytest[${PYTHON_USEDEP}]
+		dev-python/freezegun[${PYTHON_USEDEP}]
+	)
+"
+
+python_prepare_all() {
+	local PATCHES=(
+		"${FILESDIR}"/0001-zoneinfo-Get-timezone-data-from-system-tzdata.patch
+	)
+
+	# don't install zoneinfo tarball
+	sed -i '/package_data=/d' setup.py || die
+
+	distutils-r1_python_prepare_all
+}
+
+python_test() {
+	py.test -v || die "Tests failed under ${EPYTHON}"
+}