%rb_binary                         /usr/bin/ruby
%rb_arch                           %(%{rb_binary} -e 'print RUBY_PLATFORM')
%rb_ver                            %(%{rb_binary} -r rbconfig -e 'print RbConfig::CONFIG["ruby_version"]')
#

## Base
# "rubylibprefix"=>"/usr/lib64/ruby",
%rb_dir           %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["rubylibprefix"]' )
# "rubylibdir"    =>"/usr/lib64/ruby/2.1.0",
%rb_libdir        %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["rubylibdir"]' )
# "archdir"       =>"/usr/lib64/ruby/2.1.0/x86_64-linux",
%rb_archdir       %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["archdir"]' )

## Site
# "sitedir"       =>"/usr/lib64/ruby/site_ruby",
%rb_sitedir       %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["sitedir"]' )
# "sitelibdir"    =>"/usr/lib64/ruby/site_ruby/2.1.0",
%rb_sitelibdir    %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["sitelibdir"]' )
# "sitearchdir"   =>"/usr/lib64/ruby/site_ruby/2.1.0/x86_64-linux",
%rb_sitearchdir   %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["sitearchdir"]' )

## Vendor
# "vendordir"     =>"/usr/lib64/ruby/vendor_ruby",
%rb_vendordir     %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["vendordir"]' )
# "vendorlibdir"  =>"/usr/lib64/ruby/vendor_ruby/2.1.0",
%rb_vendorlibdir  %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["vendorlibdir"]' )
# "vendorarchdir" =>"/usr/lib64/ruby/vendor_ruby/2.1.0/x86_64-linux",
%rb_vendorarchdir %(%{rb_binary} -rrbconfig -e 'puts RbConfig::CONFIG["vendorarchdir"]' )

# backward compat
%rb_sitearch      %{rb_sitearchdir}
%rb_sitelib       %{rb_sitelibdir}
%rb_vendorlib     %{rb_vendorlibdir}
%rb_vendorarch    %{rb_vendorarchdir}

%set_gem_binary() \
  %if "%{?gem_binary}" == "" \
  %global gem_binary %(/usr/bin/ruby-find-versioned gem|head -n1) \
  %endif \
  %if "%{?gem_binary}" == "" \
  echo "no gem binary found. Exiting." \
  exit 1 \
  %endif \
%{nil}


# %%gem_unpack macro unpacks a gem file into %%{_builddir}
#
# example:
#   %prep
#   %gem_unpack %{SOURCE0}
#   %patch1 -p1
#
%gem_unpack(s:) \
  source=%{-s:%{-s*}}%{!-s:%{SOURCE0}} \
  %{set_gem_binary} \
  %{gem_binary} unpack --verbose $source \
  cd %{mod_name}-%{version} \
  chmod og-w -R . \
  %{gem_binary} specification --ruby $source > %{mod_name}-%{version}.gemspec \
%{nil}

# %%gem_build macro ...
#
%gem_build() \
GEMSPEC_SOURCE_DIR=`find . -maxdepth 2 -type f -name %{mod_name}-%{version}.gemspec | xargs dirname` \
%{set_gem_binary} \
cd $GEMSPEC_SOURCE_DIR && %{gem_binary} build --verbose %{mod_name}-%{version}.gemspec \
%{nil}

# %%gem_install macro ...
#
# When invoked with a single parameter, the macro retains the old macro behavior, i.e.
# building the upstream gem directly in $RPM_BUILD_ROOT without unpacking to %{_builddir} first.
#
%gem_install /usr/lib/rpm/gem_install.sh              --default-gem %{mod_name}-%{version}.gem --gem-name=%{mod_name} --gem-version=%{version} --build-root %{buildroot} %{?mod_version_suffix:--gem-suffix=%{mod_version_suffix}} %{?gem_binary:--gem-binary %{gem_binary}}
%gem_packages %{expand:%(/usr/lib/rpm/gem_packages.sh --default-gem %{mod_name}-%{version}.gem --gem-name=%{mod_name} --gem-version=%{version} --build-root %{buildroot})}

# we need to copy parts of the %fdupes macro as rpm can't expand parameters in macro "calls" ;(
%gem_cleanup() \
for gem in $(/usr/bin/ruby-find-versioned gem) ; do \
  gem_base="$($gem env gemdir)" \
  /usr/lib/rpm/gem_build_cleanup.sh %{buildroot}${gem_base} \
  fdupes -q -p -n -r -o name %{buildroot}${gem_base} | \
    while read _file; do \
      if test -z "$_target" ; then \
        _target="$_file"; \
      else \
        if test -z "$_file" ; then \
          _target=""; \
          continue ; \
        fi ; \
        ln -sf "${_target#%{buildroot}}" "$_file"; \
      fi ; \
   done \
done \
%{nil}

# this is used in older gems - but it's pointless with newer ruby/rpm versions
%rubygems_requires %{nil}

%gem_base %(%{rb_binary} -rrubygems -e 'print Gem::Specification.new.base_dir' )
%gem_extensions %(%{rb_binary} -rrubygems -e 'print Gem::Specification.new.extensions_dir' || echo %{_libdir}/ruby/gems/%{rb_ver}/gems )
%gem_doc_ext %(%{rb_binary} -r rubygems -e 'bs = Gem::Specification.new; rp = bs.extensions_dir.rpartition(bs.base_dir); print rp[1]+"/doc"+rp[2]' )
%gem_platform %(%{rb_binary} -r rubygems -r rbconfig -e 'print Gem::Platform.new(RbConfig::CONFIG["arch"]).to_s' )