Only have one /usr/bin/cython

According to the current packaging guidelines, if the functionality
of the executable is the same regardless of the Python version,
the executable should be shipped by Python 3 package only.

This is the case for Cython.

Cython.spec

@@ -6,7 +6,7 @@
 
 Name:           Cython
 Version:        0.28.4
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Language for writing Python extension modules
 
 License:        ASL 2.0
@@ -45,6 +45,7 @@ Python 2 version.
 %package -n python3-%{srcname}
 Summary:        %{summary}
 %{?python_provide:%python_provide python3-%{srcname}}
+Conflicts:      python2-%{srcname} < 0.28.4-2
 BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 %if %{with tests}
@@ -65,17 +66,13 @@ Python 3 version.
 %py3_build
 
 %install
-# Must do the python3 install first because the scripts in /usr/bin are
-# overwritten with every setup.py install (and we want the python2 version
-# to be the default for now).
-%py3_install
-for bin in cython cythonize cygdb; do
-  mv %{buildroot}%{_bindir}/${bin} %{buildroot}%{_bindir}/${bin}3
-done
-rm -rf %{buildroot}%{python3_sitelib}/setuptools/tests
-
 %py2_install
 rm -rf %{buildroot}%{python2_sitelib}/setuptools/tests
+rm %{buildroot}%{_bindir}/*
+
+%py3_install
+rm -rf %{buildroot}%{python3_sitelib}/setuptools/tests
+
 
 %if %{with tests}
 %check
@@ -86,9 +83,6 @@ rm -rf %{buildroot}%{python2_sitelib}/setuptools/tests
 %files -n python2-%{srcname}
 %license LICENSE.txt
 %doc *.txt Demos Doc Tools
-%{_bindir}/cython
-%{_bindir}/cygdb
-%{_bindir}/cythonize
 %{python2_sitearch}/%{srcname}-*.egg-info/
 %{python2_sitearch}/%{srcname}/
 %{python2_sitearch}/pyximport/
@@ -97,9 +91,9 @@ rm -rf %{buildroot}%{python2_sitelib}/setuptools/tests
 %files -n python3-%{srcname}
 %license LICENSE.txt
 %doc *.txt Demos Doc Tools
-%{_bindir}/cython3
-%{_bindir}/cythonize3
-%{_bindir}/cygdb3
+%{_bindir}/cython
+%{_bindir}/cygdb
+%{_bindir}/cythonize
 %{python3_sitearch}/%{srcname}-*.egg-info/
 %{python3_sitearch}/%{srcname}/
 %{python3_sitearch}/pyximport/
@@ -107,6 +101,9 @@ rm -rf %{buildroot}%{python2_sitelib}/setuptools/tests
 %{python3_sitearch}/__pycache__/%{upname}.*
 
 %changelog
+* Sun Aug 05 2018 Miro Hrončok <mhroncok@redhat.com> - 0.28.4-2
+- Only have one /usr/bin/cython
+
 * Sun Jul 15 2018 Igor Gnatenko <ignatenkobrain@fedoraproject.org> - 0.28.4-1
 - Update to 0.28.4