From e2cdb44bfbf427e5d6e3b8e1aad71314608882ad Mon Sep 17 00:00:00 2001
From: Frank Li <frankli1@fb.com>
Date: Mon, 14 Aug 2017 14:02:56 -0700
Subject: [PATCH] Add script to rename existing version

---
 lib/rename-version.js | 135 ++++++++++++++++++++++++++++++++++++++++++
 package.json          |   3 +-
 2 files changed, 137 insertions(+), 1 deletion(-)
 create mode 100644 lib/rename-version.js

diff --git a/lib/rename-version.js b/lib/rename-version.js
new file mode 100644
index 0000000000..5c2e71ce5c
--- /dev/null
+++ b/lib/rename-version.js
@@ -0,0 +1,135 @@
+#!/usr/bin/env node
+
+/**
+ * Copyright (c) 2017-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+const chalk = require("chalk");
+const fs = require("fs");
+const glob = require("glob");
+const path = require("path");
+const readMetadata = require("./server/readMetadata.js");
+
+const CWD = process.cwd();
+
+// escape appropriate characters in a string to be used in a regex
+RegExp.escape = function(s) {
+  return s.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
+};
+
+// generate a doc header from metadata
+function makeHeader(metadata) {
+  let header = "---\n";
+  Object.keys(metadata).forEach(key => {
+    header += key + ": " + metadata[key] + "\n";
+  });
+  header += "---\n";
+  return header;
+}
+
+let currentVersion, newVersion;
+
+const program = require("commander");
+
+program
+  .arguments("<version_name> <new_version_name>")
+  .action((ver1, ver2) => {
+    currentVersion = ver1;
+    newVersion = ver2;
+  })
+  .parse(process.argv);
+
+// require user to input two command line arguments, current version to be
+// renamed, and new version name
+if (
+  typeof currentVersion === "undefined" ||
+  typeof newVersion === "undefined"
+) {
+  console.error(
+    `${chalk.yellow(
+      "Version numbers are not properly specified!"
+    )}\nSpecify as command line arguments: the current version you wish to rename, then the version number you want to rename it to. `
+  );
+  process.exit(1);
+}
+
+// error if no versions currently exist
+if (!fs.existsSync(CWD + "/versions.json")) {
+  console.error(
+    `${chalk.yellow(
+      "No versions found!"
+    )}\nNo versions.json file currently exists. Use the \`versions\` script if you wish to create new versions.`
+  );
+  process.exit(1);
+}
+
+const versions = JSON.parse(fs.readFileSync(CWD + "/versions.json", "utf8"));
+
+const versionIndex = versions.indexOf(currentVersion);
+// error if current specified version does not exist
+if (versionIndex < 0) {
+  console.error(
+    `${chalk.yellow(
+      "Version " + currentVersion + " does not currently exist!"
+    )}\n Version ${currentVersion} is not in the versions.json file. You can only rename existing versions.`
+  );
+  process.exit(1);
+}
+// replace old version with new version in versions.json file
+versions[versionIndex] = newVersion;
+fs.writeFileSync(CWD + "/versions.json", JSON.stringify(versions));
+
+// if folder of docs for this version exists, rename folder and rewrite doc
+// headers to use new version
+if (fs.existsSync(CWD + "/versioned_docs/version-" + currentVersion)) {
+  fs.renameSync(
+    CWD + "/versioned_docs/version-" + currentVersion,
+    CWD + "/versioned_docs/version-" + newVersion
+  );
+
+  const files = glob.sync(CWD + "/versioned_docs/version-" + newVersion + "/*");
+  files.forEach(file => {
+    const extension = path.extname(file);
+    if (extension !== ".md" && extension !== ".markdown") {
+      return;
+    }
+    const res = readMetadata.extractMetadata(fs.readFileSync(file, "utf8"));
+    const metadata = res.metadata;
+    const rawContent = res.rawContent;
+    if (!metadata.id) {
+      return;
+    }
+    metadata.id = metadata.id.replace(
+      `version-${currentVersion}-`,
+      `version-${newVersion}-`
+    );
+    fs.writeFileSync(file, makeHeader(metadata) + rawContent);
+  });
+}
+
+// if sidebar file exists for this version, rename sidebar file and rewrite
+// doc ids in the file
+let currentSidebarFile =
+  CWD + "/versioned_sidebars/version-" + currentVersion + "-sidebar.json";
+let newSidebarFile =
+  CWD + "/versioned_sidebars/version-" + newVersion + "-sidebar.json";
+if (fs.existsSync(currentSidebarFile)) {
+  fs.renameSync(currentSidebarFile, newSidebarFile);
+  let sidebarContent = fs.readFileSync(newSidebarFile, "utf8");
+  sidebarContent = sidebarContent.replace(
+    new RegExp(`version-${RegExp.escape(currentVersion)}-`, "g"),
+    `version-${newVersion}-`
+  );
+  fs.writeFileSync(newSidebarFile, sidebarContent);
+}
+
+console.log(
+  `${chalk.green("Successfully enamed version ")}${chalk.yellow(
+    currentVersion
+  )}${chalk.green(" to version ")}${chalk.yellow(newVersion)}\n`
+);
diff --git a/package.json b/package.json
index 8d105c8ebf..bab3e90e45 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "docusaurus-publish": "./lib/publish-gh-pages.js",
     "docusaurus-examples": "./lib/copy-examples.js",
     "docusaurus-write-translations": "./lib/write-translations.js",
-    "docusaurus-version": "./lib/version.js"
+    "docusaurus-version": "./lib/version.js",
+    "docusaurus-rename-version": "./lib/rename-version.js"
   }
 }