From: "Simon Kröger" <SimonKroeger@...>
Date: 2006-03-25T06:16:00+09:00
Subject: Re: require a certain version of the ruby interpreter

Shea Martin:
> Shea Martin wrote:
>> I would like to enforce ruby 1.8.4 or higher.
>>
>> if VERSION < "1.8.4"
>>     raise "Invalid version"
>> end
>>
>> Fails when VERSION is "1.8.10".
>>
>> Yeah, I know I could write my own string comparison, but was wondering
>> if there is a canned solution for this?
>>
>> ~S
> 
> 
> This works nicely, but I am sure something like this is already built
> in, but I can't seem to find it.
> 
> def require_version( p_ver_str )
>   l_have = VERSION.split('.')
>   l_need = p_ver_str.split('.')
>   l_need.each_index do |i|
>     if l_have[i].to_i < l_need[i].to_i
>       raise ScriptError, "Required Ruby #{p_ver_str}, found Ruby
> #{VERSION}"
>     end
>   end
> end
> 
> ~S

Yes :)

if VERSION < "1.8.4"
  raise "Invalid version"
end

Because:

>We will never use two digit version.  Don't worry.
>
>                                                     matz.

cheers

Simon