feat(css): broccoli stylus plugin

Author: jkuri

lib/broccoli/angular-broccoli-stylus.js

@@ -0,0 +1,68 @@
+/* jshint node: true, esversion: 6 */
+'use strict';
+
+try {
+  let stylus;
+
+  if (process.platform === 'win32') {
+    require.resolve(`${process.env.PWD}/node_modules/stylus`);
+    stylus = require(`${process.env.PWD}/node_modules/stylus`);
+  } else {
+    process.env.NODE_PATH += `:${process.env.PWD}/node_modules`;
+    require('module').Module._initPaths();
+    require.resolve('stylus');
+    stylus = require('stylus');
+  }
+
+  const Plugin  = require('broccoli-caching-writer');
+  const fs      = require('fs');
+  const fse     = require('fs-extra');
+  const path    = require('path');
+  const Funnel  = require('broccoli-funnel');
+
+  class StylusPlugin extends Plugin {
+    constructor(inputNodes, options) {
+      super(inputNodes, {});
+
+      options = options || {};
+      Plugin.call(this, inputNodes, {
+        cacheInclude: [/(.*?).styl$/]
+      });
+      this.options = options;
+      this.fileRegistry = [];
+    }
+
+    build() {
+      let entries = this.listEntries();
+      let rootFileNames = entries.map(e => {
+        return path.resolve(e.basePath, e.relativePath);
+      });
+
+      return Promise.all(rootFileNames.map(fileName => {
+        return this.compile(fileName, this.inputPaths[0], this.outputPath);
+      }));
+    }
+
+    compile(fileName, inputPath, outputPath) {
+      let content = fs.readFileSync(fileName, 'utf8');
+
+      return stylus.render(content, { filename: path.basename(fileName) }, function(err, css) {
+        let filePath = fileName.replace(inputPath, outputPath).replace(/\.styl$/, '.css');
+        fse.outputFileSync(filePath, css, 'utf8');
+      });
+    }
+  }
+
+  exports.makeBroccoliTree = (sourceDir) => {
+    let stylusSrcTree = new Funnel(sourceDir, {
+      include: ['**/*.styl'],
+      allowEmpty: true
+    });
+
+    return new StylusPlugin([stylusSrcTree]);
+  };
+} catch (e) { 
+  exports.makeBroccoliTree = () => {
+    return null;
+  };
+}