Ignore parameters (#12)

lib/puppet/catalog-diff/comparer.rb

@@ -37,6 +37,12 @@ def compare_resources(old, new, options)
         #resource[:parameters].delete(:command) unless new_resource[:parameters].include?(:command)
         #resource[:parameters].delete(:path) unless new_resource[:parameters].include?(:path)
 
+        if options[:ignore_parameters]
+          blacklist = options[:ignore_parameters].split(',')
+          filter_parameters!(new_resource[:parameters], blacklist)
+          filter_parameters!(resource[:parameters], blacklist)
+        end
+
         sort_dependencies!(new_resource[:parameters])
         sort_dependencies!(resource[:parameters])
 
@@ -82,6 +88,11 @@ def compare_resources(old, new, options)
       resource_differences
     end
 
+    # filter parameters
+    def filter_parameters!(params, blacklist)
+      params.reject! { |p, k| blacklist.include?(p.to_s) }
+    end
+
     # sort require/before/notify/subscribe before comparison
     def sort_dependencies!(params)
       params.each do |x|

lib/puppet/catalog-diff/differ.rb

@@ -75,7 +75,6 @@ def diff(options = {})
         end
       end
 
-
       Puppet.debug("Processing: #{from_file}")
       titles = {}
       titles[:to] = extract_titles(to)

lib/puppet/face/catalog/diff.rb

@@ -37,6 +37,10 @@
       summary 'Do not print classes in resource diffs'
     end
 
+    option '--ignore_parameters=' do
+      summary 'A comma-separated list of resource parameters to ignore in diff'
+    end
+
     option "--filter_local" do
       summary "Use local YAML node files to filter out queried nodes"
     end