# Puzzling over why ri can open the std ruby/ri .yaml files, b **URL:** \ **Category:** Ruby\ **Created:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/puzzling-over-why-ri-can-open-the-std-ruby-ri-yaml-files-b/74612 "2006-11-07T10:50:05Z")\ **Posts on this page:** 5\ **Page:** 1

**Author:** ![epasquier](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/e/2bfe46/32.png) [@epasquier](https://www.ruby-forum.com/u/epasquier)\ **Post date:** [November 7, 2006, 10:50am UTC](https://www.ruby-forum.com/t/puzzling-over-why-ri-can-open-the-std-ruby-ri-yaml-files-b/74612/1 "2006-11-07T10:50:05Z")

If I run \<\>, no problem. But with this code: ########## require ‘yaml’ require ‘pp’ class RiFinder def initialize(sysdir) @sysdir = sysdir end def get\_class\_info(clsName, info) clsFile = “#{@sysdir}/#{clsName}/cdesc-#{clsName}.yaml” puts “About to yaml \<\<#{clsFile}\>\>” clsInfo = File.open(clsFile) { |io| YAML.load(io) } pp clsInfo end end rifinder = RiFinder.new(“c:/ruby/share/ri/1.8/system”, nil, nil) rifinder.get\_class\_info(“Abbrev”, nil) #=========== About to yaml \<\\> I get this error: c:/ruby/lib/ruby/1.8/yaml.rb:133:in `transfer': invalid subclass (TypeError) from c:/ruby/lib/ruby/1.8/yaml.rb:133:in `load’ from get\_yaml\_info.rb:19:in `get_class_info' from get_yaml_info.rb:19:in `get\_class\_info’ from get\_yaml\_info.rb:25 ruby 1.8.4 (2006-04-14) [i386-mswin32] It’s the same code, and I don’t see ri setting any options in the YAML namespace telling it to process types like “!ruby/struct:SM::Flow::P” differently, although I gather this is the problem. Any advice? I can use yaml.rb to read back files I’ve written out with it. The problem is with the rdoc files. But it works when I go through ri (after adding the bug fix at line 99 of ri\_descriptions.rb given in [http://ruby.about.com/od/gettingstarted/qt/ruby\_ri.htm](http://ruby.about.com/od/gettingstarted/qt/ruby_ri.htm)). Thanks, Eric ---

Simple workaround… clsInfo = YAML.load(File.open(clsFile) { |io| io.read.gsub(/- !.\*/, '- ') } But I’d still appreciate hearing the cause for this bug. Happens with the stock Ruby 1.8.2 on OS X 10.4 running on an i386, but with a different error message. - Eric ---

On Oct 31, 2006, at 1:05 PM, Eric P. wrote: > ``` > @sysdir = sysdir > > ``` > > rifinder = RiFinder.new(“c:/ruby/share/ri/1.8/system”, nil, nil) > rifinder.get\_class\_info(“Abbrev”, nil) Because you need to load/define all the classes it is trying to deserialize. yaml doesn’t know where they are. Just pop in the appropriate requires up top and get rid of your munger. FWIW, I went the munging route for risearch and for that matter… you seem to be writing much of the same sort of thing. Check my blog for the code. I’ll release it to seattlerb sooner or later. ---

Thanks, Ryan, require ‘rdoc/markup/simple\_markup/to\_flow’ does it, no munging needed. Now if you can tell me how to setup the current release of cygwin on a win box to build mozilla you’ll have totally made my day. In the meantime, running a find script to zap all the 13s out of each .sh file seems to be the way to go. Right, wrong newsgroup… - Eric This seems wrong though. I want to load a set of YAML descriptions I didn’t write, and I need to know all possible subtypes ---

On Wed, Nov 01, 2006 at 06:05:12AM +0900, Eric P. wrote: > It’s the same code, and I don’t see ri setting any options in the YAML > namespace telling it to process types like “!ruby/struct:SM::Flow::P” > differently, although I gather this is the problem. > > Any advice? $ cat ri-problem.rb require ‘yaml’ require ‘pp’ class RiFinder def initialize(sysdir) @sysdir = sysdir end def get\_class\_info(clsName, info) clsFile = “#{@sysdir}/#{clsName}/cdesc-#{clsName}.yaml” puts “About to yaml \<\<#{clsFile}\>\>” clsInfo = File.open(clsFile) { |io| YAML.load(io) } pp clsInfo end end rifinder = RiFinder.new("/usr/share/ri/1.8/system/") rifinder.get\_class\_info(“Abbrev”, nil) $ ruby ri-problem.rb About to yaml \<\\> /home/batsman/usr//lib/ruby/1.8/yaml.rb:133:in `transfer': invalid subclass (TypeError) from /home/batsman/usr//lib/ruby/1.8/yaml.rb:133:in`node\_import’ from /home/batsman/usr//lib/ruby/1.8/yaml.rb:133:in `load' from /home/batsman/usr//lib/ruby/1.8/yaml.rb:133:in`load’ from ri-problem.rb:12:in `get_class_info' from ri-problem.rb:12:in`open’ from ri-problem.rb:12:in `get\_class\_info’ from ri-problem.rb:18 $ echo ‘require “rdoc/ri/ri\_reader”’ | cat - ri-problem.rb \> ri-no-problem.rb $ ruby ri-no-problem.rb About to yaml \<\\> #\], @name=“Abbrev”, @superclass=nil\>