old_contents: /* global require, module */
  'use strict';
  
  var mergeTrees  = require('broccoli-merge-trees');
  var compileCompass = require('broccoli-compass');
  
  function CompassCompilerPlugin(options, appName) {
    this.name    = 'ember-cli-compass-compiler';
    this.appName = appName;
    this.options = options || {};
    this.ext     = 'scss';
  }
  
  CompassCompilerPlugin.prototype.toTree = function(tree, inputPath, outputPath) {
    // broccoli-compass doesn't like leading slashes
    if (inputPath[0] === '/') { inputPath = inputPath.slice(1); }
  
    var options        = this.options;
    var mainFile       = options.mainFile       || (this.appName + '.' + this.ext);
    var outputStyle    = options.outputStyle    || 'compressed'; // or expanded
    var sassDir        = options.sassDir        || inputPath;
    var cssDir         = options.cssDir         || outputPath;
    var imagesDir      = options.imagesDir      || 'images';
    var fontsDir       = options.fontsDir       || 'fonts';
    var compassCommand = options.compassCommand || 'compass';
  
    var compassOptions = {
      outputStyle: outputStyle,
      require: options.require,
      importPath: options.importPath,
      sassDir: sassDir,
      imagesDir: imagesDir,
      fontsDir: fontsDir,
      cssDir: cssDir,
      compassCommand: compassCommand
    };
  
    tree = mergeTrees([tree, 'public'], {
      description: 'TreeMerger (stylesAndVendorAndPublic)'
    });
  
    return compileCompass(tree, inputPath + '/' + mainFile, compassOptions);
  };
  
  function EmberCLICompassCompiler(project) {
    this.project = project;
    this.name    = 'Ember CLI Compass Compiler';
  }
  
  EmberCLICompassCompiler.prototype.treeFor = function treeFor() {
  
  };
  
  EmberCLICompassCompiler.prototype.included = function included(app) {
    this.app     = app;
    var registry = this.app.registry;
    var plugin   = new CompassCompilerPlugin(this.app.options.compassOptions, this.app.name);
    registry.add('css', plugin);
  };
  
  module.exports = EmberCLICompassCompiler;
  
new_contents: /* global require, module */
  'use strict';
  
  var mergeTrees  = require('broccoli-merge-trees');
  var compileCompass = require('broccoli-compass');
  
  function CompassCompilerPlugin(options, appName) {
    this.name    = 'ember-cli-compass-compiler';
    this.appName = appName;
    this.options = options || {};
    this.ext     = 'scss';
  }
  
  CompassCompilerPlugin.prototype.toTree = function(tree, inputPath, outputPath) {
    // broccoli-compass doesn't like leading slashes
    if (inputPath[0] === '/') { inputPath = inputPath.slice(1); }
  
    var options        = this.options;
    var mainFile       = options.mainFile       || (this.appName + '.' + this.ext);
    var relativeAssets = options.relativeAssets !== undefined ? options.relativeAssets : true;
    var outputStyle    = options.outputStyle    || 'compressed'; // or expanded
    var sassDir        = options.sassDir        || inputPath;
    var cssDir         = options.cssDir         || outputPath;
    var imagesDir      = options.imagesDir      || 'images';
    var fontsDir       = options.fontsDir       || 'fonts';
    var compassCommand = options.compassCommand || 'compass';
  
    var compassOptions = {
      relativeAssets: relativeAssets,
      outputStyle: outputStyle,
      require: options.require,
      importPath: options.importPath,
      sassDir: sassDir,
      imagesDir: imagesDir,
      fontsDir: fontsDir,
      cssDir: cssDir,
      compassCommand: compassCommand
    };
  
    tree = mergeTrees([tree, 'public'], {
      description: 'TreeMerger (stylesAndVendorAndPublic)'
    });
  
    return compileCompass(tree, inputPath + '/' + mainFile, compassOptions);
  };
  
  function EmberCLICompassCompiler(project) {
    this.project = project;
    this.name    = 'Ember CLI Compass Compiler';
  }
  
  EmberCLICompassCompiler.prototype.treeFor = function treeFor() {
  
  };
  
  EmberCLICompassCompiler.prototype.included = function included(app) {
    this.app     = app;
    var registry = this.app.registry;
    var plugin   = new CompassCompilerPlugin(this.app.options.compassOptions, this.app.name);
    registry.add('css', plugin);
  };
  
  module.exports = EmberCLICompassCompiler;
  
subject: Add support for relativeAssets, a boolean option, defaulting to true.