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Asked: 2026-05-19T17:03:59+00:00

I’m setting up a project that uses SASS, which uses FSEvents to keep from

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I’m setting up a project that uses SASS, which uses FSEvents to keep from polling the disk. It seems that this doesn’t play nice with RVM, however. That means that when I run sass --watch I get this warning:

Warning: Unable to load CarbonCore. FSEvents will be unavailable.

I realize that it will still work, but I don’t want to be polling my disk constantly. I want to get it working with FSEvents. The best information I could find about this was this thread:

http://groups.google.com/group/compass-users/browse_thread/thread/df7d9d0da9ec1eb1

I reinstalled my RVM Ruby (using 1.9.2) as described by Brandon Mathis and downloaded the linked RubyCocoa. However, I get an error on the first step of installing RubyCocoa:

[rvm 1.9.2] ~/Downloads/RubyCocoa-1.0.0 $ ruby install.rb config --build-universal=yes
install.rb: entering config phase...
create ext/rubycocoa/extconf.rb
create framework/GeneratedConfig.xcconfig
create framework/src/objc/Version.h
create tests/Makefile
---> framework
create /Users/xxx/Downloads/RubyCocoa-1.0.0/framework/src/objc/osx_ruby.h ...
config failed
hook /Users/xxx/Downloads/RubyCocoa-1.0.0/framework/post-config.rb failed:
No such file or directory - /Users/xxx/.rvm/rubies/ruby-1.9.2-p136/lib/ruby/1.9.1/x86_64-darwin10.6.0/ruby.h
try 'ruby install.rb --help' for usage

It looks like the problem stems from this being an older version of RubyCocoa (I notice the missing file has 1.9.1 in the path), but in the Google Groups post, Brandon Mathis says specifically to use the version he links and not the newest one.

Does anyone know how to get this configured, or have a link to a recent, hopefully simpler and clearer guide to getting FSEvents working with RVM?

Versions in question:

  • RVM 1.2.0
  • Ruby 1.9.2 patch level 136 (installed via RVM)
  • Mac OS X 10.6.6
  • HAML gem 3.0.25 (SASS is part of HAML)

Thanks!

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1 Answer

  1. Editorial Team

    I wrote FSSM, which is what HAML/SASS/Compass use for their filesystem watching backend. While rubycocoa isn’t supported in 1.9.x, the latest git version of FSSM has pretty solid support for rb-fsevent. This library currently has other limitations, like only being able to monitor one path (parent directory is a must here), but I’m working on it. 😉

    I’d highly suggest installing rb-fsevent, and then FSSM from github: https://github.com/ttilley/fssm

    If you have any problems, please don’t hesitate to file an issue in the tracker. FSSM is a currently maintained project, and it was originally written to help Chris Eppstein out with providing watch functionality in compass (which was later adopted in sass itself). Ease of use via these libraries is my absolute top priority.

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