kf5-rpm-macros: fix %_kf5_metainfodir macro for < f28 (#1532930)

kf5.spec

@@ -1,6 +1,6 @@
 Name:           kf5
 Version: 5.42.0
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary:        Filesystem and RPM macros for KDE Frameworks 5
 License:        BSD
 URL:            http://www.kde.org
@@ -50,6 +50,13 @@ sed -i \
   -e "s|@@KF5_VERSION@@|%{version}|g" \
   %{buildroot}%{_rpmconfigdir}/macros.d/macros.kf5
 
+# stick to legacy appdata dir for < f28, use metainfo for new releases only
+%if 0%{?fedora} && %{fedora} < 28
+sed -i \
+  -e 's|^%%_kf5_metainfodir.*|%%_kf5_metainfodir %%_kf5_datadir/appdata|g' \
+  %{buildroot}%{_rpmconfigdir}/macros.d/macros.kf5
+%endif
+
 
 %files filesystem
 %{_sysconfdir}/xdg/plasma-workspace/
@@ -71,6 +78,9 @@ sed -i \
 
 
 %changelog
+* Wed Jan 10 2018 Rex Dieter <rdieter@fedoraproject.org> - 5.42.0-2
+- kf5-rpm-macros: fix %%_kf5_metainfodir macro for < f28 (#1532930)
+
 * Mon Jan 08 2018 Rex Dieter <rdieter@fedoraproject.org> - 5.42.0-1
 - 5.42.0