updates for EL8 support

* Adds python-zipp for building
* Sets the pytest version to 3.4 which is what EL8 provides
* Conditionally removes flake8 testing which can't be done with
pytest and flake8 versions required

python-portend.spec

@@ -21,13 +21,14 @@ Summary:        portend documentation
 
 BuildRequires:  python3-devel
 BuildRequires:  python3dist(jaraco.functools)
-BuildRequires:  python3dist(pytest) >= 3.5
+BuildRequires:  python3dist(pytest) >= 3.4
 BuildRequires:  python3dist(pytest-cov)
-BuildRequires:  python3dist(pytest-flake8)
+%{?fedora:BuildRequires: python3dist(pytest-flake8)}
 #BuildRequires:  python3dist(pytest-sugar) >= 0.9.1
 BuildRequires:  python3dist(setuptools)
 BuildRequires:  python3dist(setuptools-scm) >= 1.15
 BuildRequires:  python3dist(tempora) >= 1.8
+BuildRequires:  python3dist(zipp)
 
 %description -n python3-%{pypi_name}
  por·tend pôrˈtend/ be a sign or warning that (something, especially something
@@ -40,6 +41,7 @@ Summary:        portend documentation
 BuildRequires:  python3dist(jaraco.packaging) >= 3.2
 BuildRequires:  python3dist(rst.linker) >= 1.9
 BuildRequires:  python3dist(sphinx)
+BuildRequires:  python3-more-itertools
 
 %description -n python-%{pypi_name}-doc
 Documentation for portend
@@ -66,6 +68,11 @@ rm -rf html/.{doctrees,buildinfo}
 %py3_install
 
 %check
+%if 0%{?el8}
+# disable flake8 in the tests, need a newer version of pytest (3.5) which is not
+# available on EL8, and is pulled in by python-pytest-flake8.
+sed -i 's/ --flake8//' pytest.ini
+%endif
 LANG=C.utf-8 %{__python3} -m pytest --ignore=build
 
 %files -n python3-%{pypi_name}