Bundle Racc into StdLib.

It is increasingly hard to maintain default gems extracted from StdLib
into gems. If they are overlapped by independent versions, it is even
harder, because the overlapped versions would need to provide symlinks
back to StdLib \[[1]\]. On top of that, the layout differs from
upstream, where default gems are always available.

Because these small nuances can make hard discoverable race conditions
during Ruby application loading and runtime, it will be best to keep the
default gems bundled.

[1]: https://src.fedoraproject.org/rpms/rubygem-racc/pull-request/1

ruby.spec

@@ -156,7 +156,6 @@ Recommends: rubygem(bigdecimal) >= %{bigdecimal_version}
 # https://bugs.ruby-lang.org/issues/16431
 Requires: rubygem(did_you_mean) >= %{did_you_mean_version}
 Recommends: rubygem(openssl) >= %{openssl_version}
-Recommends: rubygem(racc) >= %{racc_version}
 
 BuildRequires: autoconf
 BuildRequires: gdbm-devel
@@ -212,6 +211,9 @@ Provides: bundled(ccan-check_type)
 Provides: bundled(ccan-container_of)
 Provides: bundled(ccan-list)
 
+# StdLib default gems.
+Provides: bundled(rubygem-racc) = %{racc_version}
+
 # Tcl/Tk support was removed from stdlib in Ruby 2.4, i.e. F27 timeframe.
 Obsoletes: ruby-tcltk < 2.4.0
 
@@ -271,6 +273,8 @@ Macros and development tools for packaging RubyGems.
 Summary:    Default gems which are part of Ruby StdLib.
 Requires:   ruby(rubygems) >= %{rubygems_version}
 Supplements: ruby(rubygems)
+# Obsoleted by Ruby 2.7 in F32 timeframe.
+Obsoletes: rubygem-racc < 1.4.16-130
 BuildArch:  noarch
 
 %description default-gems
@@ -438,19 +442,6 @@ Bundler manages an application's dependencies through its entire life, across
 many machines, systematically and repeatably.
 
 
-%package -n rubygem-racc
-Summary:    Racc is a LALR(1) parser generator
-Version:    %{racc_version}
-License:    MIT
-Requires:   ruby(release)
-Requires:   ruby(rubygems) >= %{rubygems_version}
-Provides:   rubygem(racc) = %{version}-%{release}
-
-%description -n rubygem-racc
-Racc is a LALR(1) parser generator. It is written in Ruby itself, and
-generates Ruby program.
-
-
 # Bundled gems
 #
 # These are regular packages, which might be installed just optionally. Users
@@ -753,22 +744,6 @@ ln -s %{gem_dir}/gems/psych-%{psych_version}/lib/psych %{buildroot}%{ruby_libdir
 ln -s %{gem_dir}/gems/psych-%{psych_version}/lib/psych.rb %{buildroot}%{ruby_libdir}/psych.rb
 ln -s %{_libdir}/gems/%{name}/psych-%{psych_version}/psych.so %{buildroot}%{ruby_libarchdir}/psych.so
 
-mkdir -p %{buildroot}%{gem_dir}/gems/racc-%{racc_version}/lib
-mkdir -p %{buildroot}%{_libdir}/gems/%{name}/racc-%{racc_version}
-mv %{buildroot}%{ruby_libdir}/racc* %{buildroot}%{gem_dir}/gems/racc-%{racc_version}/lib
-mv %{buildroot}%{ruby_libarchdir}/racc/ %{buildroot}%{_libdir}/gems/%{name}/racc-%{racc_version}/
-touch %{buildroot}%{_libdir}/gems/%{name}/racc-%{racc_version}/gem.build_complete
-mv %{buildroot}%{gem_dir}/specifications/default/racc-%{racc_version}.gemspec %{buildroot}%{gem_dir}/specifications
-# This used to be directories when racc was integral part of StdLib => Keep
-# them as directories and link everything in them to prevent directory =>
-# symlink conversion RPM issues.
-mkdir -p %{buildroot}%{ruby_libdir}/racc
-mkdir -p %{buildroot}%{ruby_libarchdir}/racc
-find %{buildroot}%{gem_dir}/gems/racc-%{racc_version}/lib/racc -maxdepth 1 -type f -exec \
-  sh -c 'ln -s %{gem_dir}/gems/racc-%{racc_version}/lib/racc/`basename {}` %{buildroot}%{ruby_libdir}/racc' \;
-ln -s %{gem_dir}/gems/racc-%{racc_version}/lib/racc.rb %{buildroot}%{ruby_libdir}/racc.rb
-ln -s %{_libdir}/gems/%{name}/racc-%{racc_version}/racc/cparse.so %{buildroot}%{ruby_libarchdir}/racc/cparse.so
-
 # Move the binary extensions into proper place (if no gem has binary extension,
 # the extensions directory might be empty).
 find %{buildroot}%{gem_dir}/extensions/*-%{_target_os}/%{ruby_version}/* -maxdepth 0 \
@@ -948,7 +923,6 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %exclude %{ruby_libdir}/json*
 %exclude %{ruby_libdir}/openssl*
 %exclude %{ruby_libdir}/psych*
-%exclude %{ruby_libdir}/racc*
 %{ruby_libdir}/abbrev.rb
 %{ruby_libdir}/base64.rb
 %{ruby_libdir}/benchmark*
@@ -1118,6 +1092,11 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{ruby_libarchdir}/syslog.so
 %{ruby_libarchdir}/zlib.so
 
+# Default gems
+%{ruby_libdir}/racc*
+%dir %{ruby_libarchdir}/racc
+%{ruby_libarchdir}/racc/cparse.so
+
 %{?with_systemtap:%{_systemtap_datadir}}
 
 %files -n rubygems
@@ -1178,6 +1157,7 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{gem_dir}/specifications/default/ostruct-0.2.0.gemspec
 %{gem_dir}/specifications/default/prime-0.1.1.gemspec
 %{gem_dir}/specifications/default/pstore-0.1.0.gemspec
+%{gem_dir}/specifications/default/racc-%{racc_version}.gemspec
 %{gem_dir}/specifications/default/readline-0.0.2.gemspec
 %{gem_dir}/specifications/default/readline-ext-0.1.0.gemspec
 %{gem_dir}/specifications/default/reline-0.1.3.gemspec
@@ -1195,6 +1175,13 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{gem_dir}/specifications/default/yaml-0.1.0.gemspec
 %{gem_dir}/specifications/default/zlib-1.1.0.gemspec
 
+# Use standalone rubygem-racc if Racc binary is required. Shipping this
+# executable in both packages might possibly cause conflicts. The situation
+# could be better if Ruby generated these files:
+# https://github.com/ruby/ruby/pull/2545
+%exclude %{_bindir}/racc
+%{gem_dir}/gems/racc-%{racc_version}
+
 
 %files -n rubygem-irb
 %{_bindir}/irb
@@ -1266,14 +1253,6 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{_mandir}/man1/bundle*.1*
 %{_mandir}/man5/gemfile.5*
 
-%files -n rubygem-racc
-%{ruby_libdir}/racc*
-%{ruby_libarchdir}/racc
-%{_bindir}/racc
-%{_libdir}/gems/%{name}/racc-%{racc_version}
-%{gem_dir}/gems/racc-%{racc_version}
-%{gem_dir}/specifications/racc-%{racc_version}.gemspec
-
 %files -n rubygem-minitest
 %{gem_dir}/gems/minitest-%{minitest_version}
 %exclude %{gem_dir}/gems/minitest-%{minitest_version}/.*
@@ -1327,6 +1306,7 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
   default gems to bundled gems.
 - Obsolete Net::Telnet and XMLRPC packages, because they were dropped from Ruby.
 - Add ruby-default-gems subpackage shipping all extra default gem content.
+- Bundle Racc into StdLib.
 
 * Tue Jan 28 2020 Vít Ondruch <vondruch@redhat.com> - 2.7.0-127
 - Provide StdLib links for Racc and install it by default.