Re-add macro compat cruft for RHEL, comment upstream spec

python-productmd.spec

@@ -1,3 +1,10 @@
+# ** IMPORTANT NOTE **
+# This spec is also tracked in productmd upstream git:
+# https://github.com/release-engineering/productmd
+# Please synchronize changes to it with upstream, and be aware that
+# the spec is used for builds on pure RHEL (i.e. without EPEL packages
+# or macros).
+
 # Enable Python 3 builds for Fedora + EPEL >5
 # NOTE: do **NOT** change 'epel' to 'rhel' here, as this spec is also
 # used to do RHEL builds without EPEL
@@ -9,6 +16,15 @@
 %bcond_with     python3
 %endif
 
+# Compatibility with RHEL. These macros have been added to EPEL but
+# not yet to RHEL proper.
+# https://bugzilla.redhat.com/show_bug.cgi?id=1307190
+%{!?__python2: %global __python2 /usr/bin/python2}
+%{!?python2_sitelib: %global python2_sitelib %(%{__python2} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib())")}
+%{!?python2_sitearch: %global python2_sitearch %(%{__python2} -c "from distutils.sysconfig import get_python_lib; print(get_python_lib(1))")}
+%{!?py2_build: %global py2_build %{expand: CFLAGS="%{optflags}" %{__python2} setup.py %{?py_setup_args} build --executable="%{__python2} -s"}}
+%{!?py2_install: %global py2_install %{expand: CFLAGS="%{optflags}" %{__python2} setup.py %{?py_setup_args} install -O1 --skip-build --root %{buildroot}}}
+
 Name:           python-productmd
 Version:        1.4
 Release:        3%{?dist}
@@ -76,6 +92,10 @@ and installation media.
 %{__python3} ./setup.py test
 %endif
 
+# this must go after all 'License:' tags
+# Implemented in EPEL, but not in RHEL
+%{!?_licensedir:%global license %doc}
+
 %files
 %license LICENSE
 %doc AUTHORS
@@ -91,6 +111,9 @@ and installation media.
 %endif
 
 %changelog
+* Wed Feb 15 2017 Adam Williamson <awilliam@redhat.com>
+- Restore compatibility cruft for pure-RHEL builds
+
 * Sat Feb 11 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1.4-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild