Don't require html5lib if lxml is required, require lxml on EL7

https://bugzilla.redhat.com/show_bug.cgi?id=1360436

python-beautifulsoup4.spec

@@ -1,3 +1,9 @@
+%if 0%{?fedora} || 0%{?rhel} > 6
+%bcond_without lxml
+%else
+%bcond_with lxml
+%endif
+
 %if 0%{?fedora} > 1
 %global with_python3 1
 %endif
@@ -20,20 +26,11 @@ BuildRequires:  python-setuptools
 BuildRequires:  python-unittest2
 BuildRequires:  python-nose
 %endif
-
+%if %{with lxml}
-Requires:       python-html5lib
-
-%if 0%{?fedora}
 BuildRequires:  python-lxml
 Requires:       python-lxml
-%endif
+%else
-
+Requires:       python-html5lib
-%if 0%{?with_python3}
-BuildRequires:  python-tools
-BuildRequires:  python3-html5lib
-BuildRequires:  python3-lxml
-BuildRequires:  python3-devel
-BuildRequires:  python3-setuptools
 %endif
 
 %description
@@ -59,8 +56,16 @@ minutes with Beautiful Soup.
 %package -n     python3-beautifulsoup4
 Summary:        HTML/XML parser for quick-turnaround applications like screen-scraping
 Group:          Development/Languages
-Requires:       python3-html5lib
+BuildRequires:  python-tools
+BuildRequires:  python3-html5lib
+BuildRequires:  python3-devel
+BuildRequires:  python3-setuptools
+%if %{with lxml}
+BuildRequires:  python3-lxml
 Requires:       python3-lxml
+%else
+Requires:       python3-html5lib
+%endif
 Obsoletes:      python3-BeautifulSoup < 1:3.2.1-2
 
 %description -n python3-beautifulsoup4
@@ -141,6 +146,10 @@ pushd %{py3dir}
 %endif
 
 %changelog
+* Tue Jul 26 2016 Ville Skyttä <ville.skytta@iki.fi>
+- Don't require html5lib if lxml is required
+- Require lxml on EL7
+
 * Tue Jul 19 2016 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.4.1-4
 - https://fedoraproject.org/wiki/Changes/Automatic_Provides_for_Python_RPM_Packages