index.js

var path = require('path')
var fs = require('fs')
var mkdirp = require('mkdirp')
var CachingWriter = require('broccoli-caching-writer')
var sass = require('node-sass')

module.exports = SassCompiler
SassCompiler.prototype = Object.create(CachingWriter.prototype)
SassCompiler.prototype.constructor = SassCompiler
function SassCompiler (inputTrees, inputFile, outputFile, options) {
  if (!(this instanceof SassCompiler)) return new SassCompiler(inputTrees, inputFile, outputFile, options)
  if (!Array.isArray(inputTrees)) throw new Error('Expected array for first argument - did you mean [tree] instead of tree?')

  CachingWriter.call(this, inputTrees, options)

  this.inputFile = inputFile
  this.outputFile = outputFile
  this.options = options || {}
}


SassCompiler.prototype.updateCache = function(includePaths, destDir) {
  var destFile = path.join(destDir, this.outputFile)
  mkdirp.sync(path.dirname(destFile))

  var sassOptions = {
    file: path.join(includePaths[0], this.inputFile),
    includePaths: includePaths,

    imagePath: this.options.imagePath,
    outputStyle: this.options.outputStyle,
    precision: this.options.precision,
    sourceComments: this.options.sourceComments,
  }

  result = sass.renderSync(sassOptions)
  fs.writeFileSync(destFile, result.css)
}