Reorganise shared script utils (#52473)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/52473

Shared utils that were located in the root of `scripts/` are now colocated closer to their dependencies or moved to `scripts/shared/` — simplifying the root directory layout.

Changelog: [Internal]

Reviewed By: robhogan

Differential Revision: D77873875

fbshipit-source-id: e04dba41a1ef811d32793931033fdfa93afad0cd

jest/preprocessor.js

@@ -32,7 +32,7 @@ if (process.env.FBSOURCE_ENV === '1') {
   require('@fb-tools/babel-register');
 } else {
   // Register Babel to allow local packages to be loaded from source
-  require('../scripts/babel-register').registerForMonorepo();
+  require('../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 const transformer = require('@react-native/metro-babel-transformer');

packages/community-cli-plugin/src/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
-  require('../../../scripts/babel-register').registerForMonorepo();
+  require('../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 module.exports = require('./index.flow');

packages/core-cli-utils/src/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (process.env.BUILD_EXCLUDE_BABEL_REGISTER == null) {
-  require('../../../scripts/babel-register').registerForMonorepo();
+  require('../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 module.exports = require('./index.flow');

packages/core-cli-utils/src/public/version.js

@@ -13,7 +13,7 @@ export type * from './version.flow';
 */
 
 if (process.env.BUILD_EXCLUDE_BABEL_REGISTER == null) {
-  require('../../../../scripts/babel-register').registerForMonorepo();
+  require('../../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 module.exports = require('./version.flow');

packages/debugger-shell/src/electron/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (!Boolean(process.env.BUILD_EXCLUDE_BABEL_REGISTER)) {
-  require('../../../../scripts/babel-register').registerForMonorepo();
+  require('../../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 module.exports = require('./index.flow');

packages/debugger-shell/src/node/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
-  require('../../../../scripts/babel-register').registerForMonorepo();
+  require('../../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 export * from './index.flow';

packages/dev-middleware/src/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
-  require('../../../scripts/babel-register').registerForMonorepo();
+  require('../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 export * from './index.flow';

packages/metro-config/src/index.js

@@ -13,7 +13,7 @@ export type * from './index.flow';
 */
 
 if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
-  require('../../../scripts/babel-register').registerForMonorepo();
+  require('../../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 module.exports = require('./index.flow');

packages/react-native/scripts/featureflags/index.js

@@ -9,7 +9,7 @@
  */
 
 if (require.main === module) {
-  require('../../../../scripts/babel-register').registerForMonorepo();
+  require('../../../../scripts/shared/babelRegister').registerForMonorepo();
 
   let command;
 

packages/rn-tester/cli.js

@@ -31,7 +31,7 @@ function injectCoreCLIUtilsRuntimePatch() {
 
 if (process.env.BUILD_EXCLUDE_BABEL_REGISTER == null) {
   // $FlowFixMe[cannot-resolve-module]
-  require('../../scripts/babel-register').registerForMonorepo();
+  require('../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 injectCoreCLIUtilsRuntimePatch();

private/helloworld/cli.js

@@ -31,7 +31,7 @@ function injectCoreCLIUtilsRuntimePatch() {
 
 if (process.env.BUILD_EXCLUDE_BABEL_REGISTER == null) {
   // $FlowFixMe[cannot-resolve-module]
-  require('../../scripts/babel-register').registerForMonorepo();
+  require('../../scripts/shared/babelRegister').registerForMonorepo();
 }
 
 injectCoreCLIUtilsRuntimePatch();

private/react-native-fantom/config/metro-babel-transformer.js

@@ -10,5 +10,5 @@
 
 'use strict';
 
-require('../../../scripts/babel-register').registerForMonorepo();
+require('../../../scripts/shared/babelRegister').registerForMonorepo();
 module.exports = require('@react-native/metro-babel-transformer');

private/react-native-fantom/runner/index.js

@@ -8,6 +8,6 @@
  * @format
  */
 
-require('../../../scripts/babel-register').registerForMonorepo();
+require('../../../scripts/shared/babelRegister').registerForMonorepo();
 
 module.exports = require('./runner');

private/react-native-fantom/runner/warmup/index.js

@@ -8,6 +8,6 @@
  * @format
  */
 
-require('../../../../scripts/babel-register').registerForMonorepo();
+require('../../../../scripts/shared/babelRegister').registerForMonorepo();
 
 module.exports = require('./warmup');

scripts/build/build.js

@@ -8,9 +8,9 @@
  * @format
  */
 
-require('../babel-register').registerForScript();
+require('../shared/babelRegister').registerForScript();
 
-const {PACKAGES_DIR, REPO_ROOT} = require('../consts');
+const {PACKAGES_DIR, REPO_ROOT} = require('../shared/consts');
 const {
   buildConfig,
   getBabelConfig,

scripts/build/clean.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-require('../babel-register').registerForScript();
+require('../shared/babelRegister').registerForScript();
 
 const {BUILD_DIR, PACKAGES_DIR} = require('./build');
 const {buildConfig} = require('./config');

scripts/debugger-frontend/sync-and-build.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-const {PACKAGES_DIR} = require('../consts');
+const {PACKAGES_DIR} = require('../shared/consts');
 // $FlowFixMe[untyped-import]: TODO type ansi-styles
 const ansiStyles = require('ansi-styles');
 const {execSync, spawnSync} = require('child_process');

scripts/e2e/init-project-e2e.js

@@ -10,10 +10,10 @@
 
 'use strict';
 
-/*:: import type {ProjectInfo} from '../utils/monorepo'; */
+/*:: import type {ProjectInfo} from '../shared/monorepoUtils'; */
 
-const {PRIVATE_DIR, REPO_ROOT} = require('../consts');
-const {getPackages} = require('../utils/monorepo');
+const {PRIVATE_DIR, REPO_ROOT} = require('../shared/consts');
+const {getPackages} = require('../shared/monorepoUtils');
 const {retry} = require('./utils/retry');
 const {
   VERDACCIO_SERVER_URL,

scripts/e2e/utils/verdaccio.js

@@ -10,7 +10,7 @@
 
 'use strict';
 
-const {REPO_ROOT} = require('../../consts');
+const {REPO_ROOT} = require('../../shared/consts');
 const {execSync, spawn} = require('child_process');
 const fs = require('fs');
 const path = require('path');

scripts/js-api/build-types/buildApiSnapshot.js

@@ -11,8 +11,8 @@
 
 import type {PluginObj} from '@babel/core';
 
-const {PACKAGES_DIR, REACT_NATIVE_PACKAGE_DIR} = require('../../consts');
-const {isGitRepo} = require('../../scm-utils');
+const {PACKAGES_DIR, REACT_NATIVE_PACKAGE_DIR} = require('../../shared/consts');
+const isGitRepo = require('../../shared/isGitRepo');
 const {API_EXTRACTOR_CONFIG_FILE, TYPES_OUTPUT_DIR} = require('../config');
 const apiSnapshotTemplate = require('./templates/ReactNativeApi.d.ts-template.js');
 const applyBabelTransformsSeq = require('./utils/applyBabelTransformsSeq');

scripts/js-api/build-types/buildGeneratedTypes.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-const {PACKAGES_DIR, REPO_ROOT} = require('../../consts');
+const {PACKAGES_DIR, REPO_ROOT} = require('../../shared/consts');
 const {ENTRY_POINT, IGNORE_PATTERNS, TYPES_OUTPUT_DIR} = require('../config');
 const getRequireStack = require('./resolution/getRequireStack');
 const translatedModuleTemplate = require('./templates/translatedModule.d.ts-template');

scripts/js-api/build-types/index.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-require('../../babel-register').registerForScript();
+require('../../shared/babelRegister').registerForScript();
 
 const buildApiSnapshot = require('./buildApiSnapshot');
 const buildGeneratedTypes = require('./buildGeneratedTypes');

scripts/js-api/build-types/resolution/resolveTypeInputFile.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-const {REPO_ROOT} = require('../../../consts');
+const {REPO_ROOT} = require('../../../shared/consts');
 const debug = require('debug')('build-types:resolution');
 const fs = require('fs');
 const path = require('path');

scripts/js-api/build-types/resolution/simpleResolve.js

@@ -8,8 +8,8 @@
  * @format
  */
 
-const {PACKAGES_DIR} = require('../../../consts');
-const {getPackages} = require('../../../utils/monorepo');
+const {PACKAGES_DIR} = require('../../../shared/consts');
+const {getPackages} = require('../../../shared/monorepoUtils');
 const {existsSync} = require('fs');
 const path = require('path');
 

scripts/js-api/diff-api-snapshot/index.js

@@ -9,7 +9,7 @@
  * @oncall react_native
  */
 
-require('../../babel-register').registerForScript();
+require('../../shared/babelRegister').registerForScript();
 
 const {diffApiSnapshot} = require('./diffApiSnapshot');
 const fs = require('fs');

scripts/monorepo/print/index.js

@@ -8,7 +8,6 @@
  * @noflow
  */
 
-const {getVersionsBySpec} = require('../../npm-utils');
 const {getPackages} = require('../../utils/monorepo');
 const {exit} = require('shelljs');
 const yargs = require('yargs');
@@ -42,6 +41,53 @@ function reversePatchComp(semverA, semverB) {
   return patchB - patchA;
 }
 
+/**
+ * `packageName`: name of npm package
+ * `spec`: spec range ex. '^0.72.0'
+ *
+ * Return an array of versions of the specified spec range or throw an error
+ */
+function getVersionsBySpec(
+  packageName /*: string */,
+  spec /*: string */,
+) /*: Array<string> */ {
+  const npmString = `npm view ${packageName}@'${spec}' version --json`;
+  const result = exec(npmString, {silent: true});
+
+  if (result.code) {
+    // Special handling if no such package spec exists
+    if (result.stderr.includes('npm ERR! code E404')) {
+      /**
+       * npm ERR! code E404
+       * npm ERR! 404 No match found for version ^0.72.0
+       * npm ERR! 404
+       * npm ERR! 404  '@react-native/community-cli-plugin@^0.72.0' is not in this registry.
+       * npm ERR! 404
+       * npm ERR! 404 Note that you can also install from a
+       * npm ERR! 404 tarball, folder, http url, or git url.
+       * {
+       *   "error": {
+       *     "code": "E404",
+       *     "summary": "No match found for version ^0.72.0",
+       *     "detail": "\n '@react-native/community-cli-plugin@^0.72.0' is not in this registry.\n\nNote that you can also install from a\ntarball, folder, http url, or git url."
+       *   }
+       * }
+       */
+      const error = JSON.parse(
+        result.stderr
+          .split('\n')
+          .filter(line => !line.includes('npm ERR'))
+          .join(''),
+      ).error;
+      throw new Error(error.summary);
+    } else {
+      throw new Error(`Failed: ${npmString}`);
+    }
+  }
+  const versions = JSON.parse(result.stdout.trim());
+  return !Array.isArray(versions) ? [versions] : versions;
+}
+
 async function main() {
   const data = [];
   const packages = await getPackages({

scripts/release-testing/test-e2e-local.js

@@ -17,8 +17,8 @@
  * and to make it more accessible for other devs to play around with.
  */
 
-const {REPO_ROOT} = require('../consts');
 const {initNewProjectFromSource} = require('../e2e/init-project-e2e');
+const {REPO_ROOT} = require('../shared/consts');
 const {
   checkPackagerRunning,
   launchPackagerInSeparateWindow,

scripts/releases-ci/__tests__/publish-npm-test.js

@@ -21,7 +21,7 @@ const getNpmInfoMock = jest.fn();
 const generateAndroidArtifactsMock = jest.fn();
 const getPackagesMock = jest.fn();
 
-const {REPO_ROOT} = require('../../consts');
+const {REPO_ROOT} = require('../../shared/consts');
 const {publishNpm} = require('../publish-npm');
 const path = require('path');
 
@@ -33,7 +33,7 @@ describe('publish-npm', () => {
       .mock('shelljs', () => ({
         exec: execMock,
       }))
-      .mock('./../../scm-utils', () => ({
+      .mock('../../releases/utils/scm-utils', () => ({
         exitIfNotOnGit: command => command(),
         getCurrentCommit: () => 'currentco_mmit',
         isTaggedLatest: isTaggedLatestMock,
@@ -49,8 +49,8 @@ describe('publish-npm', () => {
       .mock('../../releases/set-rn-artifacts-version', () => ({
         updateReactNativeArtifacts: updateReactNativeArtifactsMock,
       }))
-      .mock('../../npm-utils', () => ({
-        ...jest.requireActual('../../npm-utils'),
+      .mock('../../releases/utils/npm-utils', () => ({
+        ...jest.requireActual('../../releases/utils/npm-utils'),
         publishPackage: publishPackageMock,
         getNpmInfo: getNpmInfoMock,
       }));
@@ -78,7 +78,7 @@ describe('publish-npm', () => {
     it('should fail when invalid build type is passed', async () => {
       // Call actual function
       // $FlowExpectedError[underconstrained-implicit-instantiation]
-      const npmUtils = jest.requireActual('../../npm-utils');
+      const npmUtils = jest.requireActual('../../releases/utils/npm-utils');
       getNpmInfoMock.mockImplementation(npmUtils.getNpmInfo);
 
       await expect(async () => {
@@ -117,14 +117,14 @@ describe('publish-npm', () => {
 
   describe("publishNpm('nightly')", () => {
     beforeAll(() => {
-      jest.mock('../../utils/monorepo', () => ({
-        ...jest.requireActual('../../utils/monorepo'),
+      jest.mock('../../shared/monorepoUtils', () => ({
+        ...jest.requireActual('../../shared/monorepoUtils'),
         getPackages: getPackagesMock,
       }));
     });
 
     afterAll(() => {
-      jest.unmock('../../utils/monorepo');
+      jest.unmock('../../shared/monorepoUtils');
     });
 
     it('should publish', async () => {

scripts/releases-ci/__tests__/publish-updated-packages-test.js

@@ -20,7 +20,7 @@ const fetchMock = jest.fn();
 
 jest.mock('child_process', () => ({execSync}));
 jest.mock('shelljs', () => ({exec: execMock}));
-jest.mock('../../utils/monorepo', () => ({
+jest.mock('../../shared/monorepoUtils', () => ({
   getPackages: getPackagesMock,
 }));
 // $FlowIgnore[cannot-write]

scripts/releases-ci/publish-npm.js

@@ -14,17 +14,17 @@
 import type {BuildType} from '../releases/utils/version-utils';
 */
 
-const {REPO_ROOT} = require('../consts');
-const {getNpmInfo, publishPackage} = require('../npm-utils');
 const {
   updateReactNativeArtifacts,
 } = require('../releases/set-rn-artifacts-version');
 const {setVersion} = require('../releases/set-version');
+const {getNpmInfo, publishPackage} = require('../releases/utils/npm-utils');
 const {
   publishAndroidArtifactsToMaven,
   publishExternalArtifactsToMaven,
 } = require('../releases/utils/release-utils');
-const {getPackages} = require('../utils/monorepo');
+const {REPO_ROOT} = require('../shared/consts');
+const {getPackages} = require('../shared/monorepoUtils');
 const path = require('path');
 const yargs = require('yargs');
 

scripts/releases-ci/publish-updated-packages.js

@@ -8,8 +8,8 @@
  * @format
  */
 
-const {publishPackage} = require('../npm-utils');
-const {getPackages} = require('../utils/monorepo');
+const {publishPackage} = require('../releases/utils/npm-utils');
+const {getPackages} = require('../shared/monorepoUtils');
 const {execSync} = require('child_process');
 const {parseArgs} = require('util');
 

scripts/releases/__tests__/set-rn-artifacts-version-test.js

@@ -20,7 +20,7 @@ jest.mock('fs', () => ({
   },
 }));
 
-const {REPO_ROOT} = require('../../consts');
+const {REPO_ROOT} = require('../../shared/consts');
 const {updateReactNativeArtifacts} = require('../set-rn-artifacts-version');
 const path = require('path');
 

scripts/releases/__tests__/set-version-test.js

@@ -11,7 +11,7 @@
 const {setVersion} = require('../set-version');
 const path = require('path');
 
-jest.mock('../../consts', () => ({
+jest.mock('../../shared/consts', () => ({
   REPO_ROOT: path.join(__dirname, '__fixtures__', 'set-version'),
   PACKAGES_DIR: path.join(__dirname, '__fixtures__', 'set-version', 'packages'),
   REACT_NATIVE_PACKAGE_DIR: path.join(

scripts/releases/create-release-commit.js

@@ -9,7 +9,7 @@
  */
 
 const {setVersion} = require('../releases/set-version');
-const {getBranchName} = require('../scm-utils');
+const {getBranchName} = require('../releases/utils/scm-utils');
 const {parseVersion} = require('./utils/version-utils');
 const {execSync} = require('child_process');
 const yargs = require('yargs');

scripts/releases/prepare-ios-prebuilds.js

@@ -16,7 +16,7 @@ const {setupDependencies} = require('./ios-prebuild/setupDependencies');
 const {createSwiftPackageFile} = require('./ios-prebuild/swift-package');
 const path = require('path');
 
-require('../babel-register').registerForScript();
+require('../shared/babelRegister').registerForScript();
 
 const THIRD_PARTY_PATH = 'packages/react-native/third-party';
 const BUILD_DESTINATION = '.build';

scripts/releases/set-rn-artifacts-version.js

@@ -12,8 +12,8 @@
 import type {BuildType, Version} from './utils/version-utils';
 */
 
-const {REPO_ROOT} = require('../consts');
-const {getNpmInfo} = require('../npm-utils');
+const {getNpmInfo} = require('../releases/utils/npm-utils');
+const {REPO_ROOT} = require('../shared/consts');
 const {parseVersion, validateBuildType} = require('./utils/version-utils');
 const {promises: fs} = require('fs');
 const path = require('path');

scripts/releases/set-version.js

@@ -11,14 +11,14 @@
 'use strict';
 
 /*::
-import type {PackageJson} from '../utils/monorepo';
+import type {PackageJson} from '../shared/monorepoUtils';
 */
 
 const {
   getPackages,
   getWorkspaceRoot,
   updatePackageJson,
-} = require('../utils/monorepo');
+} = require('../shared/monorepoUtils');
 const {updateReactNativeArtifacts} = require('./set-rn-artifacts-version');
 const {parseArgs} = require('util');
 

scripts/releases/utils/__tests__/npm-utils-test.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-const {getNpmInfo, getVersionsBySpec, publishPackage} = require('../npm-utils');
+const {getNpmInfo, publishPackage} = require('../npm-utils');
 
 const execMock = jest.fn();
 const getCurrentCommitMock = jest.fn();
@@ -98,49 +98,4 @@ describe('npm-utils', () => {
       });
     });
   });
-
-  describe('getVersionsBySpec', () => {
-    it('should return array when single version returned', () => {
-      execMock.mockImplementationOnce(() => ({code: 0, stdout: '"0.72.0" \n'}));
-
-      const versions = getVersionsBySpec('mypackage', '^0.72.0');
-      expect(versions).toEqual(['0.72.0']);
-    });
-
-    it('should return array of versions', () => {
-      execMock.mockImplementationOnce(() => ({
-        code: 0,
-        stdout: '[\n"0.73.0",\n"0.73.1"\n]\n',
-      }));
-
-      const versions = getVersionsBySpec('mypackage', '^0.73.0');
-      expect(versions).toEqual(['0.73.0', '0.73.1']);
-    });
-
-    it('should return error summary if E404', () => {
-      const error =
-        `npm ERR! code E404\n` +
-        `npm ERR! 404 No match found for version ^0.72.0\n` +
-        `npm ERR! 404\n` +
-        `npm ERR! 404  '@react-native/community-cli-plugin@^0.72.0' is not in this registry.\n` +
-        `npm ERR! 404\n` +
-        `npm ERR! 404 Note that you can also install from a\n` +
-        `npm ERR! 404 tarball, folder, http url, or git url.\n` +
-        `{\n` +
-        `  "error": {\n` +
-        `    "code": "E404",\n` +
-        `    "summary": "No match found for version ^0.72.0",\n` +
-        `    "detail": "\n '@react-native/community-cli-plugin@^0.72.0' is not in this registry.\n\nNote that you can also install from a\ntarball, folder, http url, or git url."\n` +
-        `  }\n` +
-        `}\n`;
-      execMock.mockImplementationOnce(() => ({
-        code: 1,
-        stderr: error,
-      }));
-
-      expect(() => {
-        getVersionsBySpec('mypackage', '^0.72.0');
-      }).toThrow('No match found for version ^0.72.0');
-    });
-  });
 });

scripts/releases/utils/npm-utils.js

@@ -10,12 +10,12 @@
 
 'use strict';
 
-const {parseVersion} = require('./releases/utils/version-utils');
 const {
   exitIfNotOnGit,
   getCurrentCommit,
   isTaggedLatest,
 } = require('./scm-utils');
+const {parseVersion} = require('./version-utils');
 const {exec} = require('shelljs');
 
 /*::
@@ -173,55 +173,7 @@ function getPackageVersionStrByTag(
   return result.stdout.trim();
 }
 
-/**
- * `packageName`: name of npm package
- * `spec`: spec range ex. '^0.72.0'
- *
- * Return an array of versions of the specified spec range or throw an error
- */
-function getVersionsBySpec(
-  packageName /*: string */,
-  spec /*: string */,
-) /*: Array<string> */ {
-  const npmString = `npm view ${packageName}@'${spec}' version --json`;
-  const result = exec(npmString, {silent: true});
-
-  if (result.code) {
-    // Special handling if no such package spec exists
-    if (result.stderr.includes('npm ERR! code E404')) {
-      /**
-       * npm ERR! code E404
-       * npm ERR! 404 No match found for version ^0.72.0
-       * npm ERR! 404
-       * npm ERR! 404  '@react-native/community-cli-plugin@^0.72.0' is not in this registry.
-       * npm ERR! 404
-       * npm ERR! 404 Note that you can also install from a
-       * npm ERR! 404 tarball, folder, http url, or git url.
-       * {
-       *   "error": {
-       *     "code": "E404",
-       *     "summary": "No match found for version ^0.72.0",
-       *     "detail": "\n '@react-native/community-cli-plugin@^0.72.0' is not in this registry.\n\nNote that you can also install from a\ntarball, folder, http url, or git url."
-       *   }
-       * }
-       */
-      const error = JSON.parse(
-        result.stderr
-          .split('\n')
-          .filter(line => !line.includes('npm ERR'))
-          .join(''),
-      ).error;
-      throw new Error(error.summary);
-    } else {
-      throw new Error(`Failed: ${npmString}`);
-    }
-  }
-  const versions = JSON.parse(result.stdout.trim());
-  return !Array.isArray(versions) ? [versions] : versions;
-}
-
 module.exports = {
   getNpmInfo,
-  getVersionsBySpec,
   publishPackage,
 };

scripts/shared/babelRegister.js

@@ -28,7 +28,7 @@ let isRegisteredForMonorepo = false;
  * ```js
  * // Place in a package entry point
  * if (!process.env.BUILD_EXCLUDE_BABEL_REGISTER) {
- *   require('../../../scripts/babel-register').registerForMonorepo();
+ *   require('../../../scripts/shared/babelRegister').registerForMonorepo();
  * }
  * ```
  */
@@ -57,7 +57,7 @@ function registerForMonorepo() {
  *
  * ```js
  * // Place in a script entry point
- * require('../babel-register').registerForScript();
+ * require('../shared/babelRegister').registerForScript();
  * ```
  */
 function registerForScript() {

scripts/shared/consts.js

@@ -13,7 +13,7 @@ const path = require('path');
 /**
  * The absolute path to the repo root.
  */
-const REPO_ROOT /*: string */ = path.resolve(__dirname, '..');
+const REPO_ROOT /*: string */ = path.resolve(__dirname, '../..');
 
 /**
  * The absolute path to the packages directory (note: this directory alone may

scripts/shared/isGitRepo.js

@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow strict-local
+ * @format
+ */
+
+'use strict';
+
+const childProcess = require('child_process');
+
+/*::
+type Commit = string;
+*/
+
+function isGitRepo() /*: boolean */ {
+  try {
+    const result = childProcess.execSync(
+      'git rev-parse --is-inside-work-tree',
+      {
+        encoding: 'utf8',
+        stdio: ['ignore', 'pipe', 'ignore'],
+      },
+    );
+    return result.trim() === 'true';
+  } catch (error) {
+    console.error(`Failed to check git repository status: ${error}`);
+  }
+  return false;
+}
+
+module.exports = isGitRepo;

scripts/shared/monorepoUtils.js

@@ -8,7 +8,7 @@
  * @format
  */
 
-const {REPO_ROOT} = require('../consts');
+const {REPO_ROOT} = require('./consts');
 const {promises: fs} = require('fs');
 const glob = require('glob');
 const path = require('path');