Extract logic from bump-oss-version specific to prod releases

Summary:
Changelog: [Internal] - Extract logic from bump-oss-version specific to prod releases

This work is part of an effort to automate the release process by using a push to a release branch as a trigger to prepare, package and deploy react-native to npm from CircleCI

The following diagram describes the context (what kind of releases we do, relevant scripts and what they do), the pre-existing process for the different types of release and how I've modified the process.
{F683387103}

This diff creates the `prepare-package-for-release` script referenced by extracting it out of `bump-oss-version` and leveraging `set-rn-version`. It adds some helper functions to `version-utils` with tests

Reviewed By: sota000

Differential Revision: D32556610

fbshipit-source-id: eb4ddc787498744156f985ab6d205c5d160e279b

Author: Luna Wei

scripts/__tests__/version-utils-test.js

@@ -7,7 +7,12 @@
  * @format
  */
 
-const {parseVersion, getNextVersionFromTags} = require('../version-utils');
+const {
+  parseVersion,
+  getNextVersionFromTags,
+  isTaggedLatest,
+  isReleaseBranch,
+} = require('../version-utils');
 
 let execResult = null;
 jest.mock('shelljs', () => ({
@@ -19,6 +24,30 @@ jest.mock('shelljs', () => ({
 }));
 
 describe('version-utils', () => {
+  describe('isReleaseBranch', () => {
+    it('should identify as release branch', () => {
+      expect(isReleaseBranch('v0.66-stable')).toBe(true);
+      expect(isReleaseBranch('0.66-stable')).toBe(true);
+      expect(isReleaseBranch('made-up-stuff-stable')).toBe(true);
+    });
+    it('should not identify as release branch', () => {
+      expect(isReleaseBranch('main')).toBe(false);
+      expect(isReleaseBranch('pull/32659')).toBe(false);
+    });
+  });
+  describe('isTaggedLatest', () => {
+    it('it should identify commit as tagged `latest`', () => {
+      execResult = '6c19dc3266b84f47a076b647a1c93b3c3b69d2c5\n';
+      expect(isTaggedLatest('6c19dc3266b84f47a076b647a1c93b3c3b69d2c5')).toBe(
+        true,
+      );
+    });
+    it('it should not identify commit as tagged `latest`', () => {
+      execResult = '6c19dc3266b84f47a076b647a1c93b3c3b69d2c5\n';
+      expect(isTaggedLatest('6c19dc3266b8')).toBe(false);
+    });
+  });
+
   describe('getNextVersionFromTags', () => {
     it('should increment last stable tag', () => {
       execResult =

scripts/prepare-package-for-release.js

@@ -0,0 +1,91 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+'use strict';
+
+/**
+ * This script prepares a release package to be pushed to npm
+ * It will:
+ *    * It updates the version in json/gradle files and makes sure they are consistent between each other (set-rn-version)
+ *    * Updates podfile for RNTester
+ *    * Commits changes and tags with the next version based off of last version tag.
+ *      This in turn will trigger another CircleCI job to publish to npm
+ */
+const {echo, exec, exit} = require('shelljs');
+const yargs = require('yargs');
+const {
+  isReleaseBranch,
+  isTaggedLatest,
+  getNextVersionFromTags,
+} = require('./version-utils');
+
+const branch = process.env.CIRCLE_BRANCH;
+const currentCommit = process.env.CIRCLE_SHA1;
+
+const argv = yargs.option('r', {
+  alias: 'remote',
+  default: 'origin',
+}).argv;
+
+if (!isReleaseBranch(branch)) {
+  console.error('This needs to be on a release branch');
+  exit(1);
+}
+
+// Progress the version by 1 using existing git tags
+const {version} = getNextVersionFromTags(branch);
+
+if (exec(`node scripts/set-rn-version.js --to-version ${version}`).code) {
+  echo(`Failed to set React Native version to ${version}`);
+  exit(1);
+}
+
+// Release builds should commit the version bumps, and create tags.
+echo('Updating RNTester Podfile.lock...');
+if (exec('source scripts/update_podfile_lock.sh && update_pods').code) {
+  echo('Failed to update RNTester Podfile.lock.');
+  echo('Fix the issue, revert and try again.');
+  exit(1);
+}
+
+// Check if this release has been tagged as latest
+const isLatest = isTaggedLatest(currentCommit);
+
+// Make commit [0.21.0-rc] Bump version numbers
+if (exec(`git commit -a -m "[${version}] Bump version numbers"`).code) {
+  echo('failed to commit');
+  exit(1);
+}
+
+// Since we just committed, if `isLatest`, move the tag to commit we just made
+// This tag will also update npm release as `latest`
+if (isLatest) {
+  exec('git tag -d latest');
+  exec(`git push ${remote} :latest`);
+  exec('git tag latest');
+  exec(`git push ${remote} latest`);
+}
+
+// Add tag v0.21.0-rc.1
+if (exec(`git tag v${version}`).code) {
+  echo(
+    `failed to tag the commit with v${version}, are you sure this release wasn't made earlier?`,
+  );
+  echo('You may want to rollback the last commit');
+  echo('git reset --hard HEAD~1');
+  exit(1);
+}
+
+// Push newly created tag
+let remote = argv.remote;
+exec(`git push ${remote} v${version}`);
+
+exec(`git push ${remote} ${branch} --follow-tags`);
+
+exit(0);

scripts/version-utils.js

@@ -68,7 +68,21 @@ function getNextVersionFromTags(branch) {
   return `${major}.${minor}.${parseInt(patch, 10) + 1}`;
 }
 
+function isReleaseBranch(branch) {
+  return branch.endsWith('-stable');
+}
+
+function isTaggedLatest(commitSha) {
+  return (
+    exec(`git rev-list -1 latest | grep ${commitSha}`, {
+      silent: true,
+    }).stdout.trim() === commitSha
+  );
+}
+
 module.exports = {
+  isTaggedLatest,
   parseVersion,
   getNextVersionFromTags,
+  isReleaseBranch,
 };