Could not find FFI Provider

[martinandersson]

Running any kind of task created by this plugin crash on my machine:

ERROR: Loading command: install (LoadError)
               Could not load FFI Provider: (NotImplementedError) FFI not available: null
 See https://jira.codehaus.org/browse/JRUBY-4583

ERROR: While executing gem ... (NoMethodError=
      undefined method 'invoke_with_build_args' for nul:NilClass

My machine is Windows 8.1, x64. My Gradle version: 2.3.6. The gradle-compass plugin version used: 2.0.5.

[ghost]

I am having the exact same Issue here :(
Windows 8.1. Oracle Java 8 jdk. Gradle 2.3.9.

[martinandersson]

I tried everything on this earth trying to get Gradle to compile SASS. Nothing works. So until further notice, I have skipped the thought of it. I'll go with vanilla CSS until someone somewhere know how to make Gradle compile SASS.

[ghost]

Same here. Until this works out of the box I will use JAWR with a SassPreProcessor.

[ghost]

seems to be this issue:
jruby-gradle/jruby-gradle-plugin#83

Please use latest jruby-gradle v0.1.15 then it should be fixed.

[ghost]

I solved it by a custom build from the 2.0.4 version together with jruby-gradle 0.1.15 and it works.
my output now:

$ gradlew compassCompile

Download https://repo1.maven.org/maven2/org/jruby/jruby-complete/1.7.19/jruby-complete-1.7.19.pom
Download https://repo1.maven.org/maven2/org/jruby/jruby-artifacts/1.7.19/jruby-artifacts-1.7.19.pom
Download https://repo1.maven.org/maven2/org/jruby/jruby-parent/1.7.19/jruby-parent-1.7.19.pom
Download https://repo1.maven.org/maven2/org/jruby/jruby-complete/1.7.19/jruby-complete-1.7.19.jar
    Compass is charityware. If you love it, please donate on our behalf at http://umdf.org/compass Thanks!
        Successfully installed compass-1.0.3
        Successfully installed sass-3.4.13
        Successfully installed compass-core-1.0.3
        Successfully installed compass-import-once-1.0.5
        Successfully installed chunky_png-1.3.4
        Successfully installed rb-fsevent-0.9.4
        Successfully installed rb-inotify-0.9.5
        Successfully installed multi_json-1.11.0
        Successfully installed ffi-1.9.8-java
        9 gems installed

   write src/main/resources/static/assets/css/main.css

Please provide a new version with latest jruby-gradle. thanks you :)

[fgiannesini]

As a workaround of this error, i had in jruby-gradle-plugin with the last 0.1.x version in the classpath dependencies

buildscript {
    repositories {
        jcenter()
        maven { url "http://dl.bintray.com/robfletcher/gradle-plugins" }
    }
    dependencies {
        classpath (
            "com.github.robfletcher:compass-gradle-plugin:+",
            "com.github.jruby-gradle:jruby-gradle-plugin:0.1.+"
        )
    }
}

Works for me on java 8.60