Switch to sassc-rails.

[nickcharlton]

Ruby Sass will reach end of life on 26th Match 2019. This switches to
sassc-rails and drops the appraisal for Sass 3.4.

Currently, sassc-rails still has sass as a dependency hence this is still
included in the Gemfile.lock.

See: rails/sass-rails#420

Fixes #1196.

[krzysiek1507]

Unfortunately, it breaks heroku builds with error:

Installing sassc 1.12.1 with native
Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

I couldn't see buildpacks for libsass 3.5.2.

[nickcharlton]

@krzysiek1507 According to the sassc-rails README, you'll need at least Cedar-14. Are you using that?

[krzysiek1507]

I have heroku-16.

[nickcharlton]

@krzysiek1507 Huh, interesting!

I've been trying out adjusting the way the prototype app works so that I could deploy a Heroku Review App to try this PR out. It's also running heroku-16 and with the heroku/ruby buildpack.

Is there perhaps something else your app is doing that's causing this?

[krzysiek1507]

Does it compile w/o problems? Did you add any buildpack expect heroku/ruby?

[nickcharlton]

It's using just heroku/ruby:

administrate/app.json

Lines 38 to 41 in 2c54226

	"buildpacks": [
	{
	"url": "heroku/ruby"
	}

Here's the build log: https://gist.github.com/nickcharlton/05d7cd0828b2e786571fa5110abe0adb

[krzysiek1507]

Weird. I was trying to use sassc-ruby in sinatra app a few weeks ago and it didn't work.
I'll check it again on Monday.

[nickcharlton]

@krzysiek1507 Where you able to check out your example in the end?

[archonic]

I think it's safe to say there's a way to install sassc on heroku these days. Even if there wasn't, I don't think this gem would need take ownership of those issues. We're now past EOL. Think we can merge this @nickcharlton?

[krzysiek1507]

Sorry for the delay. I didn't make it work on heroku but, I think, a buildpack with libsass should make it work.