gatsby node

Author: dzinemon

gatsby-node.js

@@ -1,6 +1,37 @@
 const path = require(`path`)
 const { postsPerPage } = require(`./src/utils/siteConfig`)
 const { paginate } = require(`gatsby-awesome-pagination`)
+const util = require('util');
+const glob = require("glob")
+const fs = require('fs');
+const md5 = require('md5');
+const hash = md5(`${new Date().getTime()}`)
+
+const addPageDataVersion = async file => {
+  const stats = await util.promisify(fs.stat)(file)
+  if (stats.isFile()) {
+    console.log(`Adding version to page-data.json in ${file}..`)
+    let content = await util.promisify(fs.readFile)(file, 'utf8')
+    const result = content.replace(
+      /page-data.json(\?v=[a-f0-9]{32})?/g,
+      `page-data.json?v=${hash}`
+    )
+    await util.promisify(fs.writeFile)(file, result, 'utf8')
+  }
+}
+
+exports.onPostBootstrap = async () => {
+  const loader = path.join(__dirname, 'node_modules/gatsby/cache-dir/loader.js')
+  await addPageDataVersion(loader)
+}
+
+exports.onPostBuild = async () => {
+  const publicPath = path.join(__dirname, 'public')
+  const htmlAndJSFiles = glob.sync(`${publicPath}/**/*.{html,js}`)
+  for (let file of htmlAndJSFiles) {
+    await addPageDataVersion(file)
+  }
+}
 
 /**
  * Here is the place where Gatsby creates the URLs for all the
@@ -159,4 +190,4 @@ exports.createPages = async ({ graphql, actions }) => {
             }
         },
     })
-}
+}