1 files changed, 51 insertions, 0 deletions
diff --git a/lib/puppet/node_source/external.rb b/lib/puppet/node_source/external.rb
new file mode 100644
index 000000000..54111d924
--- /dev/null
+++ b/lib/puppet/node_source/external.rb
@@ -0,0 +1,51 @@
+Puppet::Network::Handler::Node.newnode_source(:external, :fact_merge => true) do
+    desc "Call an external program to get node information."
+
+    include Puppet::Util
+    # Look for external node definitions.
+    def nodesearch(name)
+        return nil unless Puppet[:external_nodes] != "none"
+  
+        # This is a very cheap way to do this, since it will break on
+        # commands that have spaces in the arguments.  But it's good
+        # enough for most cases.
+        external_node_command = Puppet[:external_nodes].split
+        external_node_command << name
+        begin
+            output = Puppet::Util.execute(external_node_command)
+        rescue Puppet::ExecutionFailure => detail
+            if $?.exitstatus == 1
+                return nil
+            else
+                Puppet.err "Could not retrieve external node information for %s: %s" % [name, detail]
+            end
+            return nil
+        end
+        
+        if output =~ /\A\s*\Z/ # all whitespace
+            Puppet.debug "Empty response for %s from external node source" % name
+            return nil
+        end
+
+        begin
+            result = YAML.load(output).inject({}) { |hash, data| hash[symbolize(data[0])] = data[1]; hash }
+        rescue => detail
+            raise Puppet::Error, "Could not load external node results for %s: %s" % [name, detail]
+        end
+
+        node = newnode(name)
+        set = false
+        [:parameters, :classes].each do |param|
+            if value = result[param]
+                node.send(param.to_s + "=", value)
+                set = true
+            end
+        end
+
+        if set
+            return node
+        else
+            return nil
+        end
+    end
+end