Class: GoogleYAMLTree

Inherits:
Psych::Visitors::YAMLTree
  • Object
show all
Defined in:
lib/google-yaml.rb

Overview

Google App Engine doesn’t support achors and alias feature of YAML Psych doesn’t provide an option to disable achors/alias YAML features

HACK: subclass the native YAMLTree, and bypass logic which checks for aliases ../psych/vistors/yaml_tree.rb

Instance Method Summary collapse

Instance Method Details

#accept(target) ⇒ Object 



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# File 'lib/google-yaml.rb', line 7

def accept target
  # HACK: disabled alias lookup
  # return any aliases we find
  # if @st.key? target
  #   oid         = @st.id_for target
  #   node        = @st.node_for target
  #   anchor      = oid.to_s
  #   node.anchor = anchor
  #   return @emitter.alias anchor
  # end

  if target.respond_to?(:to_yaml)
    begin
      loc = target.method(:to_yaml).source_location.first
      if loc !~ /(syck\/rubytypes.rb|psych\/core_ext.rb)/
        unless target.respond_to?(:encode_with)
          if $VERBOSE
            warn "implementing to_yaml is deprecated, please implement \"encode_with\""
          end

          target.to_yaml(:nodump => true)
        end
      end
    rescue
      # public_method or source_location might be overridden,
      # and it's OK to skip it since it's only to emit a warning
    end
  end

  if target.respond_to?(:encode_with)
    dump_coder target
  else
    send(@dispatch_cache[target.class], target)
  end
end