[ruby-core:47293] Re: [ruby-trunk - Feature #6910][Assigned] Loading syck's broken yaml with psych

On Thu, Aug 23, 2012 at 11:04:22AM +0900, naruse (Yui NARUSE) wrote:
> 
> Issue #6910 has been reported by naruse (Yui NARUSE).
> 
> ----------------------------------------
> Feature #6910: Loading syck's broken yaml with psych
> https://bugs.ruby-lang.org/issues/6910
> 
> Author: naruse (Yui NARUSE)
> Status: Assigned
> Priority: Normal
> Assignee: tenderlovemaking (Aaron Patterson)
> Category: ext
> Target version: 2.0.0
> 
> 
> You know, syck outputs wrong yaml.
> For example, syck works as following:
> 
> ruby-1.9.2 > ["\u3042",Time.at(0).to_s].to_yaml
> => "--- \n- \"\\xE3\\x81\\x82\"\n- 1970-01-01 09:00:00 +09:00\n"
> 
> It should be
> 
> ruby-1.9.3 > ["\u3042",Time.at(0).to_s].to_yaml
> => "---\n- あ\n- '1970-01-01 09:00:00 +0900'\n"
> 
> syck's dump of Unicode string is interpreted as "\u00E3\u0081\u0082".
> syck's dump of Time like string is interpreted as Time.
> It is hard to migrate old data to new and correct data, so it is useful if psych has a such compatibility option.

It's possible to have both syck and psych loaded in 1.9.3 (also 1.9.2 I
think):

    require 'syck'
    require 'yaml'
    require 'psych'
    
    def convert legacy
      Psych.dump YAML.load legacy
    end
    
    legacy = YAML.dump ["\u3042",Time.at(0).to_s]
    
    puts convert legacy

I'm pushing syck to a gem so people can do this even further in the
future.

-- 
Aaron Patterson
http://tenderlovemaking.com/