Don't break old links

satya164 · satya164 · commit 29e35911a20a · 2020-02-25T23:05:05.000+01:00
diff --git a/docusaurus.config.js b/docusaurus.config.js
@@ -1,3 +1,4 @@
+const path = require('path');
 const versions = require('./versions.json');
 
 module.exports = {
@@ -104,6 +105,9 @@ module.exports = {
       ],
     },
   },
+  plugins: [
+    path.resolve(__dirname, './src/plugins/docusaurus-plugin-redirect-html')
+  ],
   presets: [
     [
       '@docusaurus/preset-classic',
diff --git a/package.json b/package.json
@@ -14,6 +14,7 @@
     "@docusaurus/core": "^2.0.0-alpha.41",
     "@docusaurus/preset-classic": "^2.0.0-alpha.41",
     "classnames": "^2.2.6",
+    "mkdirp": "^1.0.3",
     "react": "^16.8.4",
     "react-dom": "^16.8.4"
   },
diff --git a/src/plugins/docusaurus-plugin-redirect-html/index.js b/src/plugins/docusaurus-plugin-redirect-html/index.js
@@ -0,0 +1,55 @@
+const { promisify } = require('util');
+const path = require('path');
+const fs = require('fs');
+const mkdirp = require('mkdirp');
+
+const writeFileAsync = promisify(fs.writeFile);
+
+module.exports = function(context) {
+  return {
+    name: 'docusaurus-plugin-redirect-html',
+
+    postBuild({ siteConfig = {}, routesPaths = [], outDir }) {
+      routesPaths.forEach(async routesPath => {
+        if (routesPath === '/' || routesPath.endsWith('.html')) {
+          return;
+        }
+
+        const permalink = siteConfig.url.concat(routesPath.replace(/^\//, ''));
+
+        const html = `
+<!DOCTYPE html>
+<html lang="en-US">
+  <head>
+    <meta charset="UTF-8">
+    <meta http-equiv="refresh" content="0; url=${routesPath}">
+    <link rel="canonical" href="${permalink}">
+    <title>Redirecting to ${permalink}</title>
+  </head>
+  <body>
+    If you are not redirected automatically, follow <a href="${routesPath}">this link</a>.
+    <script>
+      <!--
+      window.location.href = "${routesPath}";
+      // -->
+    </script>
+  </body>
+</html>
+        `;
+
+        const redirects = [
+          `${routesPath}.html/index.html`,
+          `${routesPath.replace('/docs/', '/docs/en/')}.html`,
+          `${routesPath.replace('/docs/', '/docs/en/next/')}.html`,
+        ];
+
+        for (redirect of redirects) {
+          const file = path.join(outDir, redirect);
+
+          await mkdirp(path.dirname(file));
+          await writeFileAsync(file, html);
+        }
+      });
+    },
+  };
+};
diff --git a/yarn.lock b/yarn.lock
@@ -5636,6 +5636,11 @@ mkdirp@^0.5.1, mkdirp@~0.5.1:
   dependencies:
     minimist "0.0.8"
 
+mkdirp@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/mkdirp/-/mkdirp-1.0.3.tgz#4cf2e30ad45959dddea53ad97d518b6c8205e1ea"
+  integrity sha512-6uCP4Qc0sWsgMLy1EOqqS/3rjDHOEnsStVr/4vtAIK2Y5i2kA7lFFejYrpIyiN9w0pYf4ckeCYT9f1r1P9KX5g==
+
 move-concurrently@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/move-concurrently/-/move-concurrently-1.0.1.tgz#be2c005fda32e0b29af1f05d7c4b33214c701f92"
