chore: move to monorepo (#1297)

* chore: move to monorepo

* lint all js file

* simplify circleCI

* fix failing tests

* fix tests due to folder rename

* fix test since v1 website is renamed

packages/docusaurus-1.x/lib/server/env.js

@@ -0,0 +1,85 @@
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+const CWD = process.cwd();
+const fs = require('fs-extra');
+const path = require('path');
+const chalk = require('chalk');
+
+const siteConfig = require(`${CWD}/siteConfig.js`);
+
+const join = path.join;
+
+const languagesFile = join(CWD, 'languages.js');
+const versionsJSONFile = join(CWD, 'versions.json');
+const versionsFile = join(CWD, 'pages/en/versions.js');
+
+class Translation {
+  constructor() {
+    this.enabled = false;
+    this.languages = [
+      {
+        enabled: true,
+        name: 'English',
+        tag: 'en',
+      },
+    ];
+
+    this.load();
+  }
+
+  enabledLanguages = () => this.languages.filter(lang => lang.enabled);
+
+  load() {
+    if (fs.existsSync(languagesFile)) {
+      this.enabled = true;
+      this.languages = require(languagesFile);
+    }
+  }
+}
+
+class Versioning {
+  constructor() {
+    this.enabled = false;
+    this.latestVersion = null;
+    this.defaultVersion = null;
+    this.versions = [];
+    this.missingVersionsPage = false;
+
+    this.load();
+  }
+
+  printMissingVersionsPageError() {
+    console.error(
+      `${chalk.yellow('No versions.js file found!')}` +
+        `\nYou should create your versions.js file in pages/en directory.` +
+        `\nPlease refer to https://docusaurus.io/docs/en/versioning.html.`,
+    );
+  }
+
+  load() {
+    if (fs.existsSync(versionsJSONFile)) {
+      this.enabled = true;
+      this.versions = JSON.parse(fs.readFileSync(versionsJSONFile, 'utf8'));
+      this.latestVersion = this.versions[0];
+      this.defaultVersion = siteConfig.defaultVersionShown
+        ? siteConfig.defaultVersionShown
+        : this.latestVersion; // otherwise show the latest version (other than next/master)
+    }
+
+    if (!fs.existsSync(versionsFile)) {
+      this.missingVersionsPage = true;
+    }
+  }
+}
+
+const env = {
+  translation: new Translation(),
+  versioning: new Versioning(),
+};
+
+module.exports = env;