Accepting request 798280 from home:eeich:branches:science:HPC

- Add 'Obsolete:' option to master package. This way, a removed
  master package may be declared obsolte. 
- Allow 'Empty' package - without a 'Requires:' to keep master
  package for backward compatibility.

OBS-URL: https://build.opensuse.org/request/show/798280
OBS-URL: https://build.opensuse.org/package/show/science:HPC/suse-hpc?expand=0&rev=46

macros.hpc

@@ -32,9 +32,12 @@
 %hpc_libexecdir %{hpc_prefix}/lib
 %hpc_localstatedir %{_localstatedir}
 %hpc_sharedstatedir %{_sharedstatedir}
+# MANPATH
 %hpc_mandir %{hpc_datadir}/man
 %hpc_docdir %{hpc_datadir}/doc/packages
+# INFOPATH
 %hpc_infodir %{hpc_datadir}/info
+# PKG_CONFIG_PATH
 %hpc_pkgconfigdir %{hpc_libdir}/pkgconfig
 %hpc_cmake_dir %{hpc_datadir}/cmake
 %hpc_cmake_moddir %{hpc_cmake_dir}/Modules
@@ -369,8 +372,13 @@ cat << EOF > %{buildroot}%{hpc_module_dep_base}%{version}
 # -N  <pname>: Specify if a sub-package has different basename (pname)
 # -q: For internal use only!
 # -M: use specified name in place of %%name
+# -O: Obsoleted package with version %version, multiple obsoletes may be
+#     separated by ":"
+# -E: create an 'empty' master package with no requires. This allows to
+#     keep the macro package around for compatibility even if the underlying
+#     package has been removed.
 #
-%hpc_master_package(n:g:s:lLaqN:M:) \
+%hpc_master_package(n:g:s:lLaqN:M:O:E) \
  %define _mylib %{-s:lib}%{!-s:%{-l:lib}} \
  %define _p_ext %(test -n "%{*}" && echo -%{*}) \
  %{-M: \ %define name %{-M*}} \
@@ -415,7 +423,14 @@ cat << EOF > %{buildroot}%{hpc_module_dep_base}%{version}
 Summary: Dependency package for %{s_name} \
 Group:   %_group \
 Obsoletes: %_lname < %version \
-Requires:  %{s_name} = %version \
+%{-O:%(\
+   v=%{-O*}; \
+   for i in ${v//:/ }; \
+     do echo "Obsoletes: $i < %version"; \
+     echo "Provides: %i = %version"; \
+   done)\
+} \
+%{!-E:Requires:  %{s_name} = %version} \
 %{!-l:%{!-s:%{!-a:BuildArch:      noarch}}} \
 %description -n %_lname \
 %{pname}: %{SUMMARY} \