lib/leap_cli/config/object.rb in leap_cli-1.2.5 vs lib/leap_cli/config/object.rb in leap_cli-1.5.0

@@ -32,27 +32,32 @@
         # an object that is a node as @node equal to self, otherwise all the child objects point back to the top level node.
         @node = node || self
       end
 
       #
+      # export YAML
+      #
       # We use pure ruby yaml exporter ya2yaml instead of SYCK or PSYCH because it
       # allows us greater compatibility regardless of installed ruby version and
       # greater control over how the yaml is exported (sorted keys, in particular).
       #
-      def dump
-        evaluate
+      def dump_yaml
+        evaluate(@node)
         ya2yaml(:syck_compatible => true)
       end
 
+      #
+      # export JSON
+      #
       def dump_json
-        evaluate
+        evaluate(@node)
         JSON.sorted_generate(self)
       end
 
-      def evaluate
-        evaluate_everything
-        late_evaluate_everything
+      def evaluate(context=@node)
+        evaluate_everything(context)
+        late_evaluate_everything(context)
       end
 
       ##
       ## FETCHING VALUES
       ##
@@ -202,103 +207,107 @@
       protected
 
       #
       # walks the object tree, eval'ing all the attributes that are dynamic ruby (e.g. value starts with '= ')
       #
-      def evaluate_everything
+      def evaluate_everything(context)
         keys.each do |key|
-          obj = fetch_value(key)
+          obj = fetch_value(key, context)
           if is_required_value_not_set?(obj)
             Util::log 0, :warning, "required key \"#{key}\" is not set in node \"#{node.name}\"."
           elsif obj.is_a? Config::Object
-            obj.evaluate_everything
+            obj.evaluate_everything(context)
           end
         end
       end
 
       #
       # some keys need to be evaluated 'late', after all the other keys have been evaluated.
       #
-      def late_evaluate_everything
+      def late_evaluate_everything(context)
         if @late_eval_list
           @late_eval_list.each do |key, value|
-            self[key] = evaluate_now(key, value)
+            self[key] = context.evaluate_ruby(key, value)
             if is_required_value_not_set?(self[key])
               Util::log 0, :warning, "required key \"#{key}\" is not set in node \"#{node.name}\"."
             end
           end
         end
         values.each do |obj|
           if obj.is_a? Config::Object
-            obj.late_evaluate_everything
+            obj.late_evaluate_everything(context)
           end
         end
       end
 
-      private
-
       #
-      # fetches the value for the key, evaluating the value as ruby if it begins with '='
+      # evaluates the string `value` as ruby in the context of self.
+      # (`key` is just passed for debugging purposes)
       #
-      def fetch_value(key)
-        value = fetch(key, nil)
-        if value.is_a?(String) && value =~ /^=/
-          if value =~ /^=> (.*)$/
-            value = evaluate_later(key, $1)
-          elsif value =~ /^= (.*)$/
-            value = evaluate_now(key, $1)
-          end
-          self[key] = value
-        end
-        return value
-      end
-
-      def evaluate_later(key, value)
-        @late_eval_list ||= []
-        @late_eval_list << [key, value]
-        '<evaluate later>'
-      end
-
-      def evaluate_now(key, value)
+      def evaluate_ruby(key, value)
         result = nil
         if LeapCli.log_level >= 2
-          result = @node.instance_eval(value)
+          result = self.instance_eval(value)
         else
           begin
-            result = @node.instance_eval(value)
+            result = self.instance_eval(value)
           rescue SystemStackError => exc
-            Util::log 0, :error, "while evaluating node '#{@node.name}'"
+            Util::log 0, :error, "while evaluating node '#{self.name}'"
             Util::log 0, "offending key: #{key}", :indent => 1
             Util::log 0, "offending string: #{value}", :indent => 1
             Util::log 0, "STACK OVERFLOW, BAILING OUT. There must be an eval loop of death (variables with circular dependencies).", :indent => 1
             raise SystemExit.new(1)
           rescue FileMissing => exc
             Util::bail! do
               if exc.options[:missing]
-                Util::log :missing, exc.options[:missing].gsub('$node', @node.name)
+                Util::log :missing, exc.options[:missing].gsub('$node', self.name)
               else
-                Util::log :error, "while evaluating node '#{@node.name}'"
+                Util::log :error, "while evaluating node '#{self.name}'"
                 Util::log "offending key: #{key}", :indent => 1
                 Util::log "offending string: #{value}", :indent => 1
                 Util::log "error message: no file '#{exc}'", :indent => 1
               end
             end
           rescue AssertionFailed => exc
             Util.bail! do
-              Util::log :failed, "assertion while evaluating node '#{@node.name}'"
+              Util::log :failed, "assertion while evaluating node '#{self.name}'"
               Util::log 'assertion: %s' % exc.assertion, :indent => 1
               Util::log "offending key: #{key}", :indent => 1
             end
           rescue SyntaxError, StandardError => exc
             Util::bail! do
-              Util::log :error, "while evaluating node '#{@node.name}'"
+              Util::log :error, "while evaluating node '#{self.name}'"
               Util::log "offending key: #{key}", :indent => 1
               Util::log "offending string: #{value}", :indent => 1
               Util::log "error message: #{exc.inspect}", :indent => 1
             end
           end
         end
         return result
+      end
+
+      private
+
+      #
+      # fetches the value for the key, evaluating the value as ruby if it begins with '='
+      #
+      def fetch_value(key, context=@node)
+        value = fetch(key, nil)
+        if value.is_a?(String) && value =~ /^=/
+          if value =~ /^=> (.*)$/
+            value = evaluate_later(key, $1)
+          elsif value =~ /^= (.*)$/
+            value = context.evaluate_ruby(key, $1)
+          end
+          self[key] = value
+        end
+        return value
+      end
+
+      def evaluate_later(key, value)
+        @late_eval_list ||= []
+        @late_eval_list << [key, value]
+        '<evaluate later>'
       end
 
       #
       # when merging, we raise an error if this method returns true for the two values.
       #
\ No newline at end of file