Support HAML 5

[cgamesplay]

Support HAML 5

[CGamesPlay]

Hey, if you can check that it's working with this version of haml, then absolutely! Thank you! 🙂

[joshed-io]

Love the idea behind this library. I gave it a shot with haml >= 5 and no dice unfortunately.

My hunch is that HAML changed some internals around between 4 and 5 - this line of haml_user_tags raises an exception because attributes_hashes doesn't exist on the tag value anymore.

I may investigate further and see if that'd be easy to fix, but just dropping here for anyone who comes across.

[Valcrist77]

To get this working in our environment using Haml 5, there's two bits we've changed.

1. [:attribute_hashes] is instead [:dynamic_attributes].old. The other wrinkle is that it looks like the previous format would look like this: [" flavor: 'solid', style: \"color: #888888;\" "], the new format being returned by the node looks like "{ flavor: 'solid', style: \"color: #888888;\ }" instead. So you'll need to manipulate the string a bit.
2. Changing Haml::Buffer.merge_attrs in helpers.rb to Haml::AttributeBuilder.merge_attributes!. parse_object_ref has also moved into the Haml::AttributeBuilder module.

I've only done a cursory smoke test, so ymmv.