feat(build): broccoli sass plugin

Author: jkuri

lib/broccoli/broccoli-sass.js

@@ -0,0 +1,57 @@
+/* jshint node: true, esversion: 6 */
+'use strict';
+
+try {
+  process.env.NODE_PATH += `:${process.env.PWD}/node_modules`;
+  require('module').Module._initPaths();
+  require.resolve('node-sass');
+
+  const Plugin  = require('broccoli-caching-writer');
+  const fs      = require('fs');
+  const fse     = require('fs-extra');
+  const path    = require('path');
+  const sass    = require('node-sass');
+
+  class SASSPlugin extends Plugin {
+    constructor(inputNodes, options) {
+      super(inputNodes, {});
+
+      options = options || {};
+      Plugin.call(this, inputNodes, {
+        cacheInclude: [/(.*?).scss$/, /(.*?).sass$/]
+      });
+      this.options = options;
+      this.fileRegistry = [];
+    }
+
+    build() {
+      let entries = this.listEntries();
+      let rootFileNames = entries.map(e => {
+        return path.resolve(e.basePath, e.relativePath);
+      });
+
+      rootFileNames.forEach(fileName => {
+        this.compile(fileName, this.inputPaths[0], this.outputPath);
+      });
+    }
+
+    compile(fileName, inputPath, outputPath) {
+      let sassOptions = {
+        file: path.join(fileName),
+        includePaths: this.inputPaths
+      };
+
+      let result = sass.renderSync(sassOptions);
+      let filePath = fileName.replace(inputPath, outputPath)
+        .replace(/\.scss$/, '.css')
+        .replace(/\.sass$/, '.css');
+
+      fse.outputFileSync(filePath, result.css, 'utf8');
+    }
+  }
+
+  module.exports = SASSPlugin;
+}
+catch (e) { 
+  module.exports = null;
+}