Subject: Re: [bug#34217] [PATCH 11/11] gnu: Add ruby-cucumber and ruby-aruba.

From: Ricardo Wurmus <[email-masked]>
Date: Mon, 04 Feb 2019 00:26:59 +0100

Björn Höfling <[email-masked]> writes:

>> +    (propagated-inputs
>> +     (map (lambda (input)
>> +            (if (string=? (car input) "ruby-cucumber")
>> +                `("ruby-cucumber" ,ruby-cucumber-without-tests)
>> +                input))
>> +          (package-propagated-inputs ruby-aruba)))
>
> This is really nit-picking, I haven't tried it out myself and I haven't
> used it much myself, but I think this could be written more elegant with
> match-lambda [syntax errors might be included]:
>
>  (map (match-lambda
>        (("ruby-cucumber" . pkg)
>           `("ruby-cucumber" ,ruby-cucumber-without-tests))
> 	(input input)
> ...)

Or like this

    `(("ruby-cucumber" ,ruby-cucumber-without-tests)
      ,@(alist-delete "ruby-cucumber"
                      (package-propagated-inputs ruby-aruba)))

-- 
Ricardo