Add staticly named symlink to port-versioned directory

To be utilized by sysutils/puppetserver, here we add a symlink to point at the
gem directory. This allows puppetserver to use facter as a library without
knowing the version installed.

Approved by:    swills(mentor), robak
Differential Revision:  D13803

sysutils/rubygem-facter/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	facter
 PORTVERSION=	2.5.1
-PORTREVISION=	1
+PORTREVISION=	2
 CATEGORIES=	sysutils rubygems
 MASTER_SITES=	RG \
 		http://downloads.puppetlabs.com/facter/
@@ -17,7 +17,7 @@ LICENSE_FILE=	${WRKSRC}/LICENSE
 USE_RUBY=	yes
 USES=		gem
 
-PLIST_FILES=	bin/facter
+PLIST_FILES=	bin/facter ${GEMS_DIR}/facter
 
 OPTIONS_DEFINE=	EC2_FACTS ZFS_FACTS
 EC2_FACTS_DESC=	Generate AWS EC2 related facts
@@ -40,4 +40,7 @@ post-patch-ZFS_FACTS-off:
 	@${REINPLACE_CMD} -e 's/\,\ \"lib\/facter\/zfs_version.rb\"//' ${WRKSRC}/${PORTNAME}.gemspec
 	@${REINPLACE_CMD} -e 's/\,\ \"lib\/facter\/zpool_version.rb\"//' ${WRKSRC}/${PORTNAME}.gemspec
 
+post-install:
+	${RLN} ${STAGEDIR}/${PREFIX}/${GEMS_DIR}/facter-${PORTVERSION} ${STAGEDIR}/${PREFIX}/${GEMS_DIR}/facter
+
 .include <bsd.port.post.mk>