[backend] tweak ptf package generator for project Lotus

As the rpm in SLE12 does not understand rich dependencies we need
to encode them as provides prefixed with "ptfdep-". Libsolv will
later translate the provides to the correct requires.

We also add a new ptf-package() provides to every package belonging
to a ptf.

src/backend/obs-ptf.spec

@@ -7,7 +7,11 @@ Group:          System/Packages
 BuildArch:      noarch
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Provides:       ptf() = @patchinfo-incident@-@patchinfo-version@
+%if 0%{sle_version} >= 120000 && 0%{sle_version} <= 130000
+Provides:       ptfdep-@filtered-rpm-name@ = @filtered-rpm-evr@
+%else
 Requires:       (@filtered-rpm-name@ = @filtered-rpm-evr@ if @filtered-rpm-name@)
+%endif
 
 %description
 @patchinfo-description@
@@ -19,7 +23,7 @@ This ptf contains the following packages:
 cd %_sourcedir
 odir="%_topdir/OTHER"
 for i in *.rpm ; do
-  perl ./modifyrpmheader --add-requires '%{name} = %{version}-%{release}' --add-description '\nThis package is part of %{name}-%{version}-%{release}\n' -- "$i" "$odir/$i"
+  perl ./modifyrpmheader --add-requires '%{name} = %{version}-%{release}' --add-provides 'ptf-package()' --add-description '\nThis package is part of %{name}-%{version}-%{release}\n' -- "$i" "$odir/$i"
 done
 mkdir -p %{buildroot}/%{_defaultdocdir}/%{name}
 cat >%{buildroot}/%{_defaultdocdir}/%{name}/README <<'EOF'