Rails 4 assets:precompile error

[JustSnow]

Hello. I'd got error when assets precompiled

Sass::SyntaxError: Invalid CSS after "": expected selector or at-rule, was "{"
  (in /vendor/assets/bower_components/fontawesome/css/font-awesome.css.map)
(sass):1

font awesome version 4.3.0
4.2.0 precompiled correct

[jywarren]

I'm getting this too on 4.5.0; font-awesome.css.map is a source map file, and the rails asset pipeline is trying to compile it as css. Trying to figure out how to prevent this. Some background here: http://stackoverflow.com/questions/21504611/what-are-the-map-files-used-for-in-bootstrap-3-1

[jywarren]

I'm going to try to explicitly set the preferred_syntax option to :sass as in https://github.com/rails/sass-rails to suppress this file from being parsed by Sass.

Hmm, that didn't work.

[jywarren]

Ok, a viable option for me was to disable sass. But obviously this is not easy for everyone. If there's a way to disable compiling of source map files, that'd be great. But should this even be in the packaged fontawesome? I don't see any reference to it, and it seems to have been added in an unrelated commit.

https://github.com/FortAwesome/Font-Awesome/commits/master/css/font-awesome.css.map

I'm going to open a new issue proposing that it be removed or ignored in bower.json, and at least see what people say.

[JustSnow]

@jywarren thanks for your answer. I found solution like:

Rack::Mime::MIME_TYPES.merge!({".map" => "text/plain"})

It help me

[jywarren]

Thanks, @JustSnow, OK, I found here: emberjs/ember-rails#428 (comment) that the line you ref can be placed in config/initializers/rack.rb and that worked for me. Thanks!

[jywarren]

I think this can be closed!