Install Opscode Chef with Ruby 2.0 on FreeBSD Ports Collection

Opscode Chef version 10.x depends on JSON rubygem between 1.4.4 and 1.7.7. But, there are two points to solve:

• Ports collection's rubygem-json146 does not support Ruby 2.0
• The newest version of Ports collection's rubygem-json is 1.8.0

So that we must be some operations for install chef

1. cd /usr/ports/devel/rubygem-json
2. Install and do ports-mgmt/portdowngrade to downgrade to 1.7.7
   (or edit Makefile directly to write version 1.7.7)
3. make install
4. cd /usr/ports/sysutils/rubygem-chef
5. edit Makefile
   rubygem-json>=1.4.4:${PORTSDIR}/devel/rubygem-json146 \ to rubygem-json>=1.4.4:${PORTSDIR}/devel/rubygem-json \
6. make install

At last operation, ports collection fails because of rdoc, but Chef rubygem itself are succeeded.