Ricardo Wurmus <rekado@elephly.net> writes:

> Christopher Baines <mail@cbaines.net> writes:
>
>> Required for ruby-parser.
>>
>> * gnu/packages/ruby.scm (ruby-ast): New variable.
> […]
>> +    (native-inputs
>> +     `(("bundler" ,bundler)
>> +       ("ruby-simplecov" ,ruby-simplecov)
>> +       ("ruby-json-pure" ,ruby-json-pure)
>> +       ("ruby-mime-times" ,ruby-mime-types)
>> +       ("ruby-yard" ,ruby-yard)
>> +       ("ruby-kramdown" ,ruby-kramdown)
>> +       ("ruby-rest-client" ,ruby-rest-client)
>> +       ("ruby-bacon" ,ruby-bacon)
>> +       ("ruby-bacon-colored-output" ,ruby-bacon-colored-output)
>> +       ("ruby-racc" ,ruby-racc)))
>
> Are really none of these required at run time?

According to the gemspec at least [1].

1: https://github.com/whitequark/ast/blob/master/ast.gemspec#L14-L26

I don't know the library at all, but it seems like a AST data structure,
so I think it's possible that it's very dependency light.