chore: install cssbundling rails and set up compilation

spec/dummy/node_modules/fs-extra/lib/empty/index.js

@@ -0,0 +1,39 @@
+'use strict'
+
+const u = require('universalify').fromPromise
+const fs = require('../fs')
+const path = require('path')
+const mkdir = require('../mkdirs')
+const remove = require('../remove')
+
+const emptyDir = u(async function emptyDir (dir) {
+  let items
+  try {
+    items = await fs.readdir(dir)
+  } catch {
+    return mkdir.mkdirs(dir)
+  }
+
+  return Promise.all(items.map(item => remove.remove(path.join(dir, item))))
+})
+
+function emptyDirSync (dir) {
+  let items
+  try {
+    items = fs.readdirSync(dir)
+  } catch {
+    return mkdir.mkdirsSync(dir)
+  }
+
+  items.forEach(item => {
+    item = path.join(dir, item)
+    remove.removeSync(item)
+  })
+}
+
+module.exports = {
+  emptyDirSync,
+  emptydirSync: emptyDirSync,
+  emptyDir,
+  emptydir: emptyDir
+}