chore: migrate tools to TypeScript

.eslintrc.js

@@ -7,7 +7,7 @@ module.exports = {
     'prettier/prettier': [2, 'fb'],
   },
   // @todo: remove once we cover whole codebase with types
-  plugins: ['eslint-plugin-import'],
+  plugins: ['import'],
   settings: {
     react: {
       version: 'latest',
@@ -16,6 +16,8 @@ module.exports = {
       alias: {
         map: [['types', './types/index.js']],
       },
+      // Use <rootDir>/tsconfig.json for typescript resolution
+      typescript: {},
     },
   },
   overrides: [

.gitignore

@@ -7,3 +7,4 @@ package-lock.json
 build/
 .eslintcache
 !packages/cli/src/commands/init/__fixtures__/editTemplate/node_modules
+*.tsbuildinfo

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+  // See http://go.microsoft.com/fwlink/?LinkId=827846
+  // for the documentation about the extensions.json format
+  "recommendations": [
+    "dbaeumer.vscode-eslint",
+    "redhat.vscode-yaml",
+    "flowtype.flow-for-vscode",
+    "esbenp.prettier-vscode"
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,24 @@
+{
+  "editor.rulers": [80],
+  "files.exclude": {
+    "**/.git": true,
+    "**/node_modules": true,
+    "**/build": true
+  },
+  "editor.formatOnSave": true,
+  "flow.useNPMPackagedFlow": true,
+  "javascript.validate.enable": false,
+  "prettier.eslintIntegration": true,
+  "eslint.validate": [
+    "javascript",
+    "javascriptreact",
+    {
+      "language": "typescript",
+      "autoFix": true
+    },
+    {
+      "language": "typescriptreact",
+      "autoFix": true
+    }
+  ]
+}

babel.config.js

@@ -1,5 +1,15 @@
 module.exports = {
   babelrcRoots: ['packages/*'],
+  overrides: [
+    {
+      presets: ['@babel/preset-flow'],
+      test: '**/*.js',
+    },
+    {
+      presets: ['@babel/preset-typescript'],
+      test: '**/*.ts',
+    },
+  ],
   presets: [
     [
       require.resolve('@babel/preset-env'),
@@ -8,7 +18,6 @@ module.exports = {
         useBuiltIns: 'entry',
       },
     ],
-    require.resolve('@babel/preset-flow'),
   ],
   plugins: [
     require.resolve('@babel/plugin-transform-strict-mode'),

jest.config.js

@@ -12,7 +12,7 @@ module.exports = {
       ...common,
       displayName: 'unit',
       setupFiles: ['<rootDir>/jest/setupUnitTests.js'],
-      testMatch: ['<rootDir>/**/__tests__/*{.,-}test.js'],
+      testMatch: ['<rootDir>/**/__tests__/*{.,-}test.[jt]s'],
     },
   ],
 };

package.json

@@ -4,14 +4,16 @@
     "packages/*"
   ],
   "scripts": {
+    "prebuild": "yarn build:ts",
     "build": "node ./scripts/build.js",
-    "build-clean": "rm -rf ./packages/*/build",
+    "build:ts": "node ./scripts/buildTs.js",
+    "build-clean": "rm -rf ./packages/*/build ./packages/*/tsconfig.tsbuildinfo",
     "watch": "node ./scripts/watch.js",
     "test": "jest",
     "test:ci:unit": "jest packages --ci --coverage",
     "test:ci:e2e": "jest e2e --ci -i",
+    "lint": "eslint --ext .js,.ts . --cache --report-unused-disable-directives",
     "test:ci:cocoapods": "ruby packages/platform-ios/native_modules.rb",
-    "lint": "eslint . --cache --report-unused-disable-directives",
     "flow-check": "flow check",
     "postinstall": "yarn build",
     "publish": "yarn build-clean && yarn build && lerna publish"
@@ -22,12 +24,16 @@
     "@babel/plugin-transform-strict-mode": "^7.0.0",
     "@babel/preset-env": "^7.0.0",
     "@babel/preset-flow": "^7.0.0",
-    "@react-native-community/eslint-config": "^0.0.3",
+    "@babel/preset-typescript": "^7.3.3",
+    "@react-native-community/eslint-config": "^0.0.5",
+    "@types/jest": "^24.0.11",
+    "@types/node": "^11.13.0",
     "babel-jest": "^24.6.0",
     "babel-plugin-module-resolver": "^3.2.0",
     "chalk": "^2.4.2",
     "eslint": "^5.10.0",
     "eslint-import-resolver-alias": "^1.1.2",
+    "eslint-import-resolver-typescript": "^1.1.1",
     "eslint-plugin-import": "^2.17.0",
     "execa": "^1.0.0",
     "flow-bin": "^0.97.0",
@@ -38,6 +44,7 @@
     "metro-memory-fs": "^0.53.1",
     "micromatch": "^3.1.10",
     "mkdirp": "^0.5.1",
-    "string-length": "^2.0.0"
+    "string-length": "^2.0.0",
+    "typescript": "^3.4.5"
   }
 }

packages/cli/package.json

@@ -49,7 +49,6 @@
     "minimist": "^1.2.0",
     "mkdirp": "^0.5.1",
     "morgan": "^1.9.0",
-    "node-fetch": "^2.2.0",
     "node-notifier": "^5.2.1",
     "open": "^6.2.0",
     "ora": "^3.4.0",

packages/platform-android/package.json

@@ -5,7 +5,6 @@
   "dependencies": {
     "@react-native-community/cli-tools": "^2.0.0-alpha.20",
     "logkitty": "^0.4.0",
-    "node-fetch": "^2.2.0",
     "slash": "^2.0.0",
     "xmldoc": "^0.4.0"
   },

packages/tools/package.json

@@ -5,7 +5,13 @@
   "dependencies": {
     "chalk": "^1.1.1",
     "lodash": "^4.17.5",
-    "mime": "^1.3.4"
+    "mime": "^2.4.1",
+    "node-fetch": "^2.5.0"
+  },
+  "devDependencies": {
+    "@types/lodash": "^4.14.123",
+    "@types/mime": "^2.0.1",
+    "@types/node-fetch": "^2.3.3"
   },
   "files": [
     "build"

packages/tools/src/__mocks__/logger.js → packages/tools/src/__mocks__/logger.ts

@@ -4,7 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
  */
 
 module.exports.out = () => jest.fn();

packages/tools/src/__tests__/groupFilesByType-test.js → packages/tools/src/__tests__/groupFilesByType.test.ts

@@ -4,8 +4,6 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @format
- * @emails oncall+javascript_foundation
  */
 
 import groupFilesByType from '../groupFilesByType';

packages/tools/src/errors.js → packages/tools/src/errors.ts

@@ -16,7 +16,8 @@ export class CLIError extends Error {
       this.stack =
         typeof originError === 'string'
           ? originError
-          : originError.stack
+          : originError.stack ||
+            ''
               .split('\n')
               .slice(0, 2)
               .join('\n');

packages/tools/src/getDefaultUserTerminal.js → packages/tools/src/getDefaultUserTerminal.ts

@@ -1,4 +1,4 @@
-const getDefaultUserTerminal = (): ?string =>
+const getDefaultUserTerminal = (): string | undefined =>
   process.env.REACT_TERMINAL || process.env.TERM_PROGRAM;
 
 export default getDefaultUserTerminal;

packages/tools/src/groupFilesByType.js → packages/tools/src/groupFilesByType.ts

@@ -4,22 +4,11 @@
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
  *
- * @flow
  */
 
 import {groupBy} from 'lodash';
 import mime from 'mime';
 
-/**
- * Since there are no officially registered MIME types
- * for ttf/otf yet http://www.iana.org/assignments/media-types/media-types.xhtml,
- * we define two non-standard ones for the sake of parsing
- */
-mime.define({
-  'font/opentype': ['otf'],
-  'font/truetype': ['ttf'],
-});
-
 /**
  * Given an array of files, it groups it by it's type.
  * Type of the file is inferred from it's mimetype based on the extension
@@ -32,5 +21,5 @@ mime.define({
  * the returned object will be: {font: ['fonts/a.ttf'], image: ['images/b.jpg']}
  */
 export default function groupFilesByType(assets: Array<string>) {
-  return groupBy(assets, type => mime.lookup(type).split('/')[0]);
+  return groupBy(assets, type => (mime.getType(type) || '').split('/')[0]);
 }

packages/tools/src/index.js → packages/tools/src/index.ts

@@ -1,6 +1,3 @@
-/**
- * @flow
- */
 export {default as logger} from './logger';
 export {default as groupFilesByType} from './groupFilesByType';
 export {default as isPackagerRunning} from './isPackagerRunning';

packages/tools/src/isPackagerRunning.js → packages/tools/src/isPackagerRunning.ts

@@ -16,18 +16,17 @@ import fetch from 'node-fetch';
  *   - `not_running`: the packager nor any process is running on the expected port.
  *   - `unrecognized`: one other process is running on the port we expect the packager to be running.
  */
-function isPackagerRunning(
+async function isPackagerRunning(
   packagerPort: string = process.env.RCT_METRO_PORT || '8081',
 ): Promise<'running' | 'not_running' | 'unrecognized'> {
-  return fetch(`http://localhost:${packagerPort}/status`).then(
-    res =>
-      res
-        .text()
-        .then(body =>
-          body === 'packager-status:running' ? 'running' : 'unrecognized',
-        ),
-    () => 'not_running',
-  );
+  try {
+    const result = await fetch(`http://localhost:${packagerPort}/status`);
+    const body = await result.text();
+
+    return body === 'packager-status:running' ? 'running' : 'unrecognized';
+  } catch (_error) {
+    return 'not_running';
+  }
 }
 
 export default isPackagerRunning;

packages/tools/src/logger.js → packages/tools/src/logger.ts

@@ -1,6 +1,3 @@
-/**
- * @flow
- */
 import chalk from 'chalk';
 
 const SEPARATOR = ', ';

packages/tools/tsconfig.json

@@ -0,0 +1,7 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "build"
+  }
+}

scripts/build.js

@@ -25,31 +25,21 @@ const mkdirp = require('mkdirp');
 const babel = require('@babel/core');
 const chalk = require('chalk');
 const micromatch = require('micromatch');
-const stringLength = require('string-length');
-const {PACKAGES_DIR, getPackages} = require('./helpers');
+const {
+  PACKAGES_DIR,
+  getPackages,
+  OK,
+  adjustToTerminalWidth,
+} = require('./helpers');
 
-const OK = chalk.reset.inverse.bold.green(' DONE ');
 const SRC_DIR = 'src';
 const BUILD_DIR = 'build';
 const JS_FILES_PATTERN = '**/*.js';
+const TS_FILE_PATTERN = '**/*.ts';
 const IGNORE_PATTERN = '**/__{tests,mocks,fixtures}__/**';
 
 const transformOptions = require('../babel.config.js');
 
-const adjustToTerminalWidth = str => {
-  const columns = process.stdout.columns || 80;
-  const WIDTH = columns - stringLength(OK) + 1;
-  const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
-  let lastString = strs[strs.length - 1];
-  if (lastString.length < WIDTH) {
-    lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
-  }
-  return strs
-    .slice(0, -1)
-    .concat(lastString)
-    .join('\n');
-};
-
 function getPackageName(file) {
   return path.relative(PACKAGES_DIR, file).split(path.sep)[0];
 }
@@ -59,7 +49,7 @@ function getBuildPath(file, buildFolder) {
   const pkgSrcPath = path.resolve(PACKAGES_DIR, pkgName, SRC_DIR);
   const pkgBuildPath = path.resolve(PACKAGES_DIR, pkgName, buildFolder);
   const relativeToSrcPath = path.relative(pkgSrcPath, file);
-  return path.resolve(pkgBuildPath, relativeToSrcPath);
+  return path.resolve(pkgBuildPath, relativeToSrcPath).replace(/\.ts$/, '.js');
 }
 
 function buildNodePackage(p) {
@@ -89,7 +79,10 @@ function buildFile(file, silent) {
 
   mkdirp.sync(path.dirname(destPath), '777');
 
-  if (!micromatch.isMatch(file, JS_FILES_PATTERN)) {
+  if (
+    !micromatch.isMatch(file, JS_FILES_PATTERN) &&
+    !micromatch.isMatch(file, TS_FILE_PATTERN)
+  ) {
     fs.createReadStream(file).pipe(fs.createWriteStream(destPath));
     silent ||
       process.stdout.write(

scripts/buildTs.js

@@ -0,0 +1,47 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const chalk = require('chalk');
+const execa = require('execa');
+const {getPackages, adjustToTerminalWidth, OK} = require('./helpers');
+
+const packages = getPackages();
+
+const packagesWithTs = packages.filter(p =>
+  fs.existsSync(path.resolve(p, 'tsconfig.json')),
+);
+
+const args = [
+  path.resolve(
+    require.resolve('typescript/package.json'),
+    '..',
+    require('typescript/package.json').bin.tsc,
+  ),
+  '-b',
+  ...packagesWithTs,
+  ...process.argv.slice(2),
+];
+
+console.log(chalk.inverse('Building TypeScript definition files'));
+process.stdout.write(adjustToTerminalWidth('Building\n'));
+
+try {
+  execa.sync('node', args, {stdio: 'inherit'});
+  process.stdout.write(`${OK}\n`);
+} catch (e) {
+  process.stdout.write('\n');
+  console.error(
+    chalk.inverse.red('Unable to build TypeScript definition files'),
+  );
+  console.error(e.stack);
+  process.exitCode = 1;
+}