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On Wed 05 Feb 2014 09:32:54 AM MST, Jaromir Coufal wrote:
> Dear Horizoners,
>
> in last days there were couple of interesting discussions about
> updating to Bootstrap 3. In this e-mail, I would love to give a small
> summary and propose a solution for us.
>
> As Bootstrap was heavily dependent on Less, when we got rid of node.js
> we started to use lesscpy. Unfortunately because of this change we
> were unable to update to Bootstrap 3. Fixing lesscpy looks problematic
> - there are issues with supporting all use-cases and even if we fix
> this in some time, we might challenge these issues again in the future.
>
> There is great news for Bootstrap. It started to support Sass [0].
> (Thanks Toshi and MaxV for highlighting this news!)
>
> Thanks to this step forward, we might get out of our lesscpy issues by
> switching to Sass. I am very happy with this possible change, since
> Sass is more powerful than Less and we will be able to update our
> libraries without any constraints.
>
> There are few downsides - we will need to change our Horizon Less
> files to Sass, but it shouldn't be very big deal as far as we
> discussed it with some Horizon folks. We can actually do it as a part
> of Bootstrap update [1] (or CSS files restructuring [2]).
>
> Other concern will be with compilers. So far I've found 3 ways:
> * rails dependency (how big problem would it be?)
> * https://pypi.python.org/pypi/scss/0.7.1
> * https://pypi.python.org/pypi/SassPython/0.2.1
> * ... (other suggestions?)
>
> Nice benefit of Sass is, that we can use advantage of Compass
> framework [3], which will save us a lot of energy when writing (not
> just cross-browser) stylesheets thanks to their mixins.
>
> When we discussed on IRC with Horizoners, it looks like this is good
> way to go in order to move us forward. So I am here, bringing this
> suggestion up to whole community.
>
> My proposal for Horizon is to *switch from Less to Sass*. Then we can
> unblock our already existing BPs, get Bootstrap updates and include
> Compass framework. I believe this is all doable in Icehouse timeframe
> if there are no problems with compilers.
>
> Thoughts?
>
> -- Jarda
>
> [0] http://getbootstrap.com/getting-started/
> [1] https://blueprints.launchpad.net/horizon/+spec/bootstrap-update
> [2] https://blueprints.launchpad.net/horizon/+spec/css-breakdown
> [3] http://compass-style.org/
>
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I think this is a fantastic idea. Having no experience with Less, but 
seeing that it is troublesome - if we can use SASS/Compass, I'd be much 
more comfortable with the switch. +1

--
Jason E. Rist
Senior Software Engineer
OpenStack Management UI
Red Hat, Inc.
+1.919.754.4048
Freenode: jrist
github/identi.ca: knowncitizen