Fix obscure errors by introducing FULL_TEXT_ERRORS

Author: Romex91

lib/react_on_rails/prerender_error.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require "rainbow"
+
 # rubocop:disable: Layout/IndentHeredoc
 module ReactOnRails
   class PrerenderError < ::ReactOnRails::Error
@@ -51,11 +53,17 @@ def calc_message(component_name, console_messages, err, js_code, props)
         message << <<~MSG
           Encountered error:
 
-          #{err}
+          #{err.inspect}
 
         MSG
 
-        backtrace = err.backtrace.first(15).join("\n")
+        backtrace = if ENV["FULL_TEXT_ERRORS"] == "true"
+                      err.backtrace.join("\n")
+                    else
+                      "#{err.backtrace.first(15).join("\n")}\n" +
+                        Rainbow("The rest of the backtrace is hidden. " \
+                                "To see the full backtrace, set FULL_TEXT_ERRORS=true.").red
+                    end
       else
         backtrace = nil
       end

lib/react_on_rails/utils.rb

@@ -8,7 +8,9 @@
 
 module ReactOnRails
   module Utils
-    TRUNCATION_FILLER = "\n... TRUNCATED ...\n"
+    TRUNCATION_FILLER = "\n... TRUNCATED #{
+      Rainbow('To see the full output, set FULL_TEXT_ERRORS=true.').red
+    } ...\n".freeze
 
     # https://forum.shakacode.com/t/yak-of-the-week-ruby-2-4-pathname-empty-changed-to-look-at-file-size/901
     # return object if truthy, else return nil
@@ -186,6 +188,7 @@ def self.react_on_rails_pro_version
     def self.smart_trim(str, max_length = 1000)
       # From https://stackoverflow.com/a/831583/1009332
       str = str.to_s
+      return str if ENV["FULL_TEXT_ERRORS"] == "true"
       return str unless str.present? && max_length >= 1
       return str if str.length <= max_length