Conditionally add back Python 2 subpackage on Fedora

Dropping it caused dependency issues in other packages.

https://bugzilla.redhat.com/show_bug.cgi?id=1559099

langtable.spec

@@ -1,6 +1,10 @@
+%if 0%{?fedora}
+%global with_python2 1
+%endif
+
 Name:           langtable
 Version:        0.0.38
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Guessing reasonable defaults for locale, keyboard layout, territory, and language.
 Group:          Development/Tools
 # the translations in languages.xml and territories.xml are (mostly)
@@ -12,6 +16,9 @@ URL:            https://github.com/mike-fabian/langtable
 Source0:        https://github.com/mike-fabian/langtable/releases/download/%{version}/%{name}-%{version}.tar.gz
 BuildArch:      noarch
 BuildRequires:  perl-interpreter
+%if 0%{?with_python2}
+BuildRequires:  python2-devel
+%endif
 BuildRequires:  python3-devel
 
 %description
@@ -21,6 +28,23 @@ example, guess the territory and the keyboard layout if the language
 is known or guess the language and keyboard layout if the territory is
 already known.
 
+%if 0%{?with_python2}
+%package -n python2-langtable
+%{?python_provide:%python_provide python2-langtable}
+# Remove before F30
+Provides: %{name}-python%{?_isa} = %{version}-%{release}
+Obsoletes: %{name}-python < %{version}-%{release}
+Summary:        Python module to query the langtable-data
+Group:          Development/Tools
+License:        GPLv3+
+Requires:       %{name} = %{version}-%{release}
+Requires:       %{name}-data = %{version}-%{release}
+
+%description -n python2-langtable
+This package contains a Python module to query the data
+from langtable-data.
+%endif
+
 %package python3
 Summary:        Python module to query the langtable-data
 Group:          Development/Tools
@@ -46,14 +70,28 @@ This package contains the data files for langtable.
 
 %build
 perl -pi -e "s,_datadir = '(.*)',_datadir = '%{_datadir}/langtable'," langtable.py
+%if 0%{?with_python2}
+%py2_build
+%endif
 
 %py3_build
 
 %install
+%if 0%{?with_python2}
+%py2_install -- --install-data=%{_datadir}/langtable
+gzip --force --best $RPM_BUILD_ROOT/%{_datadir}/langtable/*.xml
+%endif
+
 %py3_install -- --install-data=%{_datadir}/langtable
+# the .xml files copied by the “python3 setup.py install” are identical
+# to those copied in the “python2 setup.py install”,
+# it does not hurt to gzip them again:
 gzip --force --best $RPM_BUILD_ROOT/%{_datadir}/langtable/*.xml
 
 %check
+%if 0%{?with_python2}
+(cd $RPM_BUILD_DIR/%{name}-%{version}/data; PYTHONPATH=.. %{__python2} ../test_cases.py; %{__python2} ../langtable.py)
+%endif
 (cd $RPM_BUILD_DIR/%{name}-%{version}/data; LC_CTYPE=en_US.UTF-8 PYTHONPATH=.. %{__python3} ../test_cases.py; %{__python3} ../langtable.py)
 xmllint --noout --relaxng $RPM_BUILD_ROOT/%{_datadir}/langtable/schemas/keyboards.rng $RPM_BUILD_ROOT/%{_datadir}/langtable/keyboards.xml.gz
 xmllint --noout --relaxng $RPM_BUILD_ROOT/%{_datadir}/langtable/schemas/languages.rng $RPM_BUILD_ROOT/%{_datadir}/langtable/languages.xml.gz
@@ -67,6 +105,11 @@ xmllint --noout --relaxng $RPM_BUILD_ROOT/%{_datadir}/langtable/schemas/timezone
 %dir %{_datadir}/langtable/
 %{_datadir}/langtable/schemas
 
+%if 0%{?with_python2}
+%files -n python2-langtable
+%{python_sitelib}/*
+%endif
+
 %files python3
 %{python3_sitelib}/langtable.py
 %{python3_sitelib}/langtable-*.egg-info
@@ -77,6 +120,10 @@ xmllint --noout --relaxng $RPM_BUILD_ROOT/%{_datadir}/langtable/schemas/timezone
 %{_datadir}/langtable/*.xml.gz
 
 %changelog
+* Tue Apr 10 2018 Pete Walter <pwalter@fedoraproject.org> - 0.0.38-5
+- Conditionally add back Python 2 subpackage on Fedora
+- Resolves: rhbz#1559099
+
 * Wed Apr 04 2018 Mike FABIAN <mfabian@redhat.com> - 0.0.38-4
 - Drop Python 2 subpackage
 - Resolves: rhbz#1559099