Drupal Commerce: Price based on Product Display Node Field

{ "rules_price_based_on_product_display_node" : {
    "LABEL" : "Price based on Product Display Node Field",
    "PLUGIN" : "reaction rule",
    "REQUIRES" : [ "php", "rules", "commerce_line_item", "commerce_product_reference" ],
    "ON" : [ "commerce_product_calculate_sell_price" ],
    "DO" : [
      { "variable_add" : {
          "USING" : {
            "type" : "integer",
            "value" : {
              "select" : "commerce-line-item:line-item-id",
              "php" : { "code" : "$line_item_wrapper = entity_metadata_wrapper(\u0027commerce_line_item\u0027, $value);\r\n$url = $line_item_wrapper-\u003Ecommerce_display_path-\u003Evalue();\r\n$url_parts = explode(\u0027\/\u0027, $url);\r\nreturn $url_parts[1];" }
            }
          },
          "PROVIDE" : { "variable_added" : { "nid" : "nid" } }
        }
      },
      { "entity_fetch" : {
          "USING" : { "type" : "node", "id" : [ "nid" ] },
          "PROVIDE" : { "entity_fetched" : { "product_display" : "Product Display" } }
        }
      },
      { "commerce_line_item_unit_price_multiply" : {
          "commerce_line_item" : [ "commerce_line_item" ],
          "amount" : [ "product-display:status" ],
          "component_name" : "discount",
          "round_mode" : "1"
        }
      }
    ]
  }
}