Introduced "knife export all" command

knife/environment_export_all.rb

@@ -0,0 +1,75 @@
+require 'chef/knife'
+require 'chef/knife/core/node_presenter'
+
+module ZephirWorks
+  class Knife
+    class EnvironmentExportAll < Chef::Knife
+
+      deps do
+        require 'chef/node'
+        require 'chef/json_compat'
+      end
+
+      banner "knife environment export all (options)"
+
+      def run
+        config[:format] = "json"
+        ui.use_presenter Chef::Knife::Core::NodePresenter
+
+        print "Exporting"
+        environments = list
+
+        environments.each do |environment_name|
+          export(environment_name)
+          print "."
+        end
+        puts "\n"
+      end
+
+    protected
+      def list
+        Chef::Environment.list.keys
+      end
+
+      def export(environment_name)
+        environment = Chef::Environment.load(environment_name)
+
+        result = {}
+        result["name"] = environment.name
+        result["description"] = environment.description
+        result["json_class"] = environment.class.name
+        result["default_attributes"] = sort_hash(environment.default_attributes)
+        result["override_attributes"] = sort_hash(environment.override_attributes)
+        result["chef_type"] = "environment"
+
+        json = presenter.format(result)
+
+        File.open("environments/#{environment_name}.json", "w") do |f|
+          f.puts json
+        end
+      end
+
+      def presenter
+        @presenter ||= ui.instance_variable_get("@presenter")
+      end
+
+      def sort_hash(hash)
+        sorted = hash.sort { |a,b| a[0] <=> b[0] }.map do |k,v|
+          [k, sort_attribute_value(v)]
+        end
+        Hash[sorted]
+      end
+
+      def sort_attribute_value(value)
+        case value
+        when Array
+          value
+        when Hash
+          Hash[value.sort { |a,b| a[0] <=> b[0] }]
+        else
+          value
+        end
+      end
+    end
+  end
+end