[Rock-dev] improving error messages in ruby

[Sylvain Joyeux]

On 03/21/2012 03:42 PM, Alexander Duda wrote:
> There are cases there certain ruby libs are not available but are
> required by a ruby script. To improve the error messages in these cases
> I was thinking of introducing a rock_require.
>
> Example:
> rock_require 'TypelibQtAdapter' , "#{ERROR_VIZKIT_IS_NOT_FULLY_BUILD}"
>
> rock_require would evaluating the second string if the require of the
> first string fails and prints the resulting string as error message.
>
> The variable ERROR_VIZKIT_IS_NOT_FULLY_BUILD is a constant which gives a
> description of the error + how to solve the error.
>
> Any comments?
Not sure. I'm usually funny with having this kind of "special" methods 
that redefine the normal workflow.

Obviously, there are a few issues: where do you define rock_require and 
the error constants ? How do you make sure that they are loaded already 
? What's the exact use case you have in mind ?
-- 
Sylvain Joyeux (Dr.Ing.)
Space & Security Robotics

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