Allow passing creator attributes

[theefer]

Minor changes to allow passing opf:role and opf:file-as attributes for the creator OPF tag in the DSL, e.g.:

creator "Dan Brown", :file_as => "Brown, Dan", :role => 'aut' # author
creator "Jimmy Doe", :role => 'trl' # translator

Also added a standard Gemfile, as I had trouble installing Jewelry to build a new gem.

[jugyo]

please wait.

[jugyo]

Currently, you can to do that as following:

creator :value => 'Jane Austen', 'opf:file-as' => 'Austen, Jane'

[theefer]

Thanks for your feedback, I missed that indeed.

However, is there any reason not to use a syntax like :

creator 'Jane Austen', 'opf:file-as' => 'Austen, Jane'

i.e. capture any extra Hash argument and map it to attributes on the element, with the value always as the explicit (required) first argument ? I guess an explicit :value => ... would make sense if :value was optional (but it's not, the OPF builder expects it) or if multiple values where possible (not the case currently).

That would be a first step toward a more concise DSL?

Then, as an optional second step, a known mapping of Symbol => opf attribute String could be managed by OPF for each field, like it's already doing for :scheme -> 'opf:scheme' for identifiers?

[jugyo]

That's right.
But I have no time to do that now :(

[theefer]

I'm happy to prepare a reworked patch for this, just wanted to know if you agreed on the general idea.

I'll keep you posted.