add html minifier for generate

lib/generate.js

@@ -8,6 +8,7 @@ const pathToRegexp = require('path-to-regexp')
 const _ = require('lodash')
 const { resolve, join, dirname, sep } = require('path')
 const { promisifyRouteParams } = require('./utils')
+const { minify } = require('html-minifier')
 const copy = pify(fs.copy)
 const remove = pify(fs.remove)
 const writeFile = pify(fs.writeFile)
@@ -87,7 +88,10 @@ module.exports = function () {
       while (routes.length) {
         yield routes.splice(0, 500).map((route) => {
           return co(function * () {
-            const { html } = yield self.renderRoute(route)
+            var { html } = yield self.renderRoute(route)
+            html = minify(html, {
+              collapseWhitespace: true
+            })
             var path = join(route, sep, 'index.html') // /about -> /about/index.html
             debug('Generate file: ' + path)
             path = join(distPath, path)

package.json

@@ -63,6 +63,7 @@
     "fs-extra": "^1.0.0",
     "glob": "^7.1.1",
     "hash-sum": "^1.0.2",
+    "html-minifier": "^3.2.3",
     "lodash": "^4.17.2",
     "lru-cache": "^4.0.2",
     "memory-fs": "^0.4.1",