Install the generated .gemspec file

Building the C implementation of facter also produce a .gemspec file.  So far,
it was not installed (probably by mistake: since nothing was using it,
everything was fine).  Now that we are about to add a consumer of this file as
sysutils/rubygem-puppetserver-ca to the ports tree, this file must be
installed.

With hat:	puppet

sysutils/facter/Makefile

@@ -2,6 +2,7 @@
 
 PORTNAME=	facter
 PORTVERSION=	3.12.0
+PORTREVISION=	1
 CATEGORIES?=	sysutils
 MASTER_SITES=	https://downloads.puppetlabs.com/facter/
 
@@ -46,6 +47,10 @@ post-patch:
 		${WRKSRC}/lib/src/facts/posix/collection.cc \
 		${WRKSRC}/lib/src/util/config/posix/config.cc
 
+post-install:
+	${MKDIR} ${STAGEDIR}${PREFIX}/lib/ruby/gems/${RUBY_VER}/specifications
+	${INSTALL_DATA} ${WRKSRC}/.gemspec ${STAGEDIR}${PREFIX}/lib/ruby/gems/${RUBY_VER}/specifications/${DISTNAME}.gemspec
+
 test: build
 	cd ${WRKSRC}/lib && bundle install --path vendor
 	cd ${WRKSRC} && ${MAKE_CMD} test

sysutils/facter/pkg-plist

@@ -19,6 +19,7 @@ include/facter/util/string.hpp
 include/facter/version.h
 lib/libfacter.so
 lib/libfacter.so.%%PORTVERSION%%
+lib/ruby/gems/%%RUBY_VER%%/specifications/facter-%%PORTVERSION%%.gemspec
 lib/ruby/vendor_ruby/facter.rb
 man/man8/facter.8.gz
 %%FACTER_JAVA%%lib/ruby/vendor_ruby/facter.jar