Move Docusaurus 1 files into directory (#966)

* Move Docusaurus 1 into v1 directory

* Update Circle CI commands for new v1 dir

* Remove OC

* Fix tests

v1/lib/core/utils.js

@@ -0,0 +1,59 @@
+/**
+ * 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 spawn = require('cross-spawn');
+
+const TRUNCATE_MARKER = /<!--\s*truncate\s*-->/;
+
+function blogPostHasTruncateMarker(content) {
+  return TRUNCATE_MARKER.test(content);
+}
+
+function extractBlogPostBeforeTruncate(content) {
+  return content.split(TRUNCATE_MARKER)[0];
+}
+
+function removeExtension(pathStr) {
+  return pathStr.replace(/\.[^/.]+$/, '');
+}
+
+function getPath(pathStr, cleanUrl = false) {
+  if (!pathStr || !cleanUrl || !pathStr.endsWith('.html')) {
+    return pathStr;
+  }
+  return pathStr.endsWith('/index.html')
+    ? pathStr.replace(/index\.html$/, '')
+    : removeExtension(pathStr);
+}
+
+function idx(target, keyPaths) {
+  return (
+    target &&
+    (Array.isArray(keyPaths)
+      ? keyPaths.reduce((obj, key) => obj && obj[key], target)
+      : target[keyPaths])
+  );
+}
+
+function getGitLastUpdated(filepath) {
+  const timeSpan = spawn
+    .sync('git', ['log', '-1', '--format=%ct', filepath])
+    .stdout.toString('utf-8');
+  if (timeSpan) {
+    const date = new Date(parseInt(timeSpan, 10) * 1000);
+    return date.toLocaleString();
+  }
+  return null;
+}
+
+module.exports = {
+  blogPostHasTruncateMarker,
+  extractBlogPostBeforeTruncate,
+  getGitLastUpdated,
+  getPath,
+  removeExtension,
+  idx,
+};