问题
I'm working with Sass, Compass and Susy on OSX / Terminal. But I can't get Susy to work together with Sass and Compass. What I've done:
sudo gem install sass
sass -v
Returns: Sass 3.3.0 (Maptastic Maple)
sudo gem install compass
This seems to also install sass-3.2.14.gem, then the compass-0.12.3.gem.
compass -v
returns: Compass 0.12.3 (Alnilam)
Everything until this point seems to work fine; I can create a Compass project and work with it. Then I try to install Susy:
sudo gem install susy --pre
or just
sudo gem install susy
This seems to install susy-2.0.0
Than I run:
compass create /Users/tom/Thomas/htdocs/susi4-test -r susy -u susy
And I get this error:
Gem::LoadError on line 2064 of /Library/Ruby/Site/1.8/rubygems/specification.rb: Unable to activate susy-2.0.0, because sass-3.2.14 conflicts with sass (~> 3.3.0)
Run with --trace to see the full backtrace
So there seems to be a problem with the compatibility of the different versions. What can I do to resolve this error?
回答1:
The dependencies are incompatible: susy 2.0.0 depends on sass ~> 3.3.0 whereas compass 0.12.3 depends on sass = 3.2.14.
The error message says the same:
Unable to activate susy-2.0.0, because sass-3.2.14 conflicts with sass (~> 3.3.0)
You can a) downgrade susy to a version that's working with sass 3.2.14 or b) upgrade compass to a version compatible with sass 3.3.x.
A compatible version is compass 1.0.0 (or later) depending on sass < 3.5, >= 3.3.13. You can install it via
gem update compass
It might be easier to use a gem manager like Bundler. It automatically resolves dependencies and installs the appropriate versions.
回答2:
gem install compass --pre
when you install compass lastest version will have error like:
ERROR: While executing gem ... (Gem::UnsatisfiableDependencyError)
Unable to resolve dependency: 'compass (= 1.0.0.alpha.19)' requires 'compass-core (~> 1.0.0.alpha.19)'
You should install compass-core first
gem install compass-core
回答3:
The best way without a doubt is to install Susy via the Compass Susy Plugin. This will avoid conflicts with other Compass projects that require the current version.
Commands:
gem install compass
gem install compass-susy-plugin
来源：https://stackoverflow.com/questions/22299466/cant-get-sass-compass-susy-installed-due-to-version-conflict