[#4055] Add CouchDB terminus for facts

Implements an abstract CouchDB terminus and a concrete CouchDB terminus
used to store node facts. Node facts are stored in a "node" document as
the "facts" attribute. This node document may also be used by other
couchdb termini that store node-related information. It is recommended
to use a separate document (or documents) to store large data structures
like catalogs, linking them to their related node document using
embedded ids.

This implementation depends on the "couchrest" gem.

* Add Puppet.features.couchdb?
* Add Puppet[:couchdb_url] setting
* Add Puppet::Node::Facts#== for testing
* Add PuppetSpec::FIXTURE_DIR for easy access to fixture files
* Add CouchDB Terminus
* Add Facts::CouchDB terminus
  * Stores facts inside a "node" document
  * Use key (hostname) as _id for node document
  * #find returns nil if document cannot be found
  * #save finds and updates existing document OR creates new doc  [1]
  * Store facts in "facts" attribute of node document

1 files changed, 5 insertions, 0 deletions

diff --git a/lib/puppet/node/facts.rb b/lib/puppet/node/facts.rb
index 2b086afea..0b9fc5879 100755
--- a/lib/puppet/node/facts.rb
+++ b/lib/puppet/node/facts.rb
@@ -49,6 +49,11 @@ class Puppet::Node::Facts
         end
     end
 
+    def ==(other)
+        return false unless self.name == other.name
+        strip_internal == other.send(:strip_internal)
+    end
+
     private
 
     # Add internal data to the facts for storage.