feat(output): add minification option

package.json

@@ -33,6 +33,7 @@
     "commander": "^2.9.0",
     "contentful": "^4.1.2",
     "glob": "^7.1.1",
+    "html-minifier": "^3.5.1",
     "moment": "^2.18.1",
     "showdown": "^1.6.4"
   },

src/build.js

@@ -6,6 +6,7 @@ import { readFileSync, writeFileSync, mkdirSync, existsSync } from 'fs'
 import { template } from 'lodash'
 import path from 'path'
 import moment from 'moment'
+import { minify } from 'html-minifier'
 
 const markdownConverter = new Converter({
   simplifiedAutoLink: true,
@@ -131,7 +132,18 @@ const buildPage = (build, config, collections, blocks, content, identifier, temp
   }
 
   // Build page
-  const pageTemplate = buildTemplate(readFileSync(template, 'utf8'), templateData)
+  let pageTemplate = buildTemplate(readFileSync(template, 'utf8'), templateData)
+  if (config.minify) {
+    pageTemplate = minify(pageTemplate, {
+      removeAttributeQuotes: true,
+      decodeEntities: true,
+      removeComments: true,
+      removeEmptyAttributes: true,
+      collapseWhitespace: true,
+      conservativeCollapse: true,
+      collapseInlineTagWhitespace: true
+    })
+  }
 
   // Build pages
   if (isIndex) {
@@ -146,7 +158,7 @@ const buildPage = (build, config, collections, blocks, content, identifier, temp
   return templateData
 }
 
-export const buildSite = (contentFile, templateDir, version, locale, environment = 'production') => {
+export const buildSite = (contentFile, templateDir, version, locale, environment = 'production', minify = true) => {
   const content = JSON.parse(readFileSync(contentFile, 'utf-8'))
 
   // Find includes
@@ -160,7 +172,8 @@ export const buildSite = (contentFile, templateDir, version, locale, environment
     environment,
     version,
     time: Date.now(),
-    locale
+    locale,
+    minify
   }
 
   // Build the config

src/cli.js

@@ -23,6 +23,7 @@ program
   .option('-l, --locale <locale>', 'contentful locale')
   .option('-t, --templates <templates>', 'template directory')
   .option('-e, --environment [environment]', 'environment', 'production')
-  .action(options => buildSite(options.content, options.templates, options.version, options.locale, options.environment))
+  .option('-m, --minify', 'minify output', false)
+  .action(options => buildSite(options.content, options.templates, options.version, options.locale, options.environment, options.minify))
 
 program.parse(process.argv)