convert @babel/cli to typescript (#13213)

* babel-cli flowts rename

* babel-cli flowts convert

* babel-cli

* yarn install

packages/babel-cli/src/babel-external-helpers.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import commander from "commander";
 import { buildExternalHelpers } from "@babel/core";
 

packages/babel-cli/src/babel/dir.ts

@@ -1,18 +1,16 @@
-// @flow
-
 import slash from "slash";
 import path from "path";
 import fs from "fs";
 
 import * as util from "./util";
-import { type CmdOptions } from "./options";
+import type { CmdOptions } from "./options";
 
 const FILE_TYPE = Object.freeze({
   NON_COMPILABLE: "NON_COMPILABLE",
   COMPILED: "COMPILED",
   IGNORED: "IGNORED",
   ERR_COMPILATION: "ERR_COMPILATION",
-});
+} as const);
 
 function outputFileSync(filePath: string, data: string | Buffer): void {
   fs.mkdirSync(path.dirname(filePath), { recursive: true });
@@ -28,7 +26,7 @@ export default async function ({
   async function write(
     src: string,
     base: string,
-  ): Promise<$Keys<typeof FILE_TYPE>> {
+  ): Promise<keyof typeof FILE_TYPE> {
     let relative = path.relative(base, src);
 
     if (!util.isCompilableExtension(relative, cliOptions.extensions)) {

packages/babel-cli/src/babel/file.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import convertSourceMap from "convert-source-map";
 import sourceMap from "source-map";
 import slash from "slash";
@@ -7,18 +5,18 @@ import path from "path";
 import fs from "fs";
 
 import * as util from "./util";
-import { type CmdOptions } from "./options";
+import type { CmdOptions } from "./options";
 
 type CompilationOutput = {
-  code: string,
+  code: string;
-  map: Object,
+  map: any;
 };
 
 export default async function ({
   cliOptions,
   babelOptions,
 }: CmdOptions): Promise<void> {
-  function buildResult(fileResults: Array<Object>): CompilationOutput {
+  function buildResult(fileResults: Array<any>): CompilationOutput {
     const map = new sourceMap.SourceMapGenerator({
       file:
         cliOptions.sourceMapTarget ||
@@ -37,7 +35,7 @@ export default async function ({
 
       if (result.map) {
         const consumer = new sourceMap.SourceMapConsumer(result.map);
-        const sources = new Set();
+        const sources = new Set<string>();
 
         consumer.eachMapping(function (mapping) {
           if (mapping.source != null) sources.add(mapping.source);
@@ -104,7 +102,7 @@ export default async function ({
   }
 
   function readStdin(): Promise<string> {
-    return new Promise((resolve: Function, reject: Function): void => {
+    return new Promise((resolve, reject): void => {
       let code = "";
 
       process.stdin.setEncoding("utf8");
@@ -158,7 +156,7 @@ export default async function ({
     });
 
     const results = await Promise.all(
-      _filenames.map(async function (filename: string): Promise<Object> {
+      _filenames.map(async function (filename: string): Promise<any> {
         let sourceFilename = filename;
         if (cliOptions.outFile) {
           sourceFilename = path.relative(

packages/babel-cli/src/babel/options.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import fs from "fs";
 
 import commander from "commander";
@@ -170,6 +168,7 @@ commander.option(
   "Use a specific extension for the output files",
 );
 
+declare const PACKAGE_JSON: { name: string; version: string };
 commander.version(PACKAGE_JSON.version + " (@babel/core " + version + ")");
 commander.usage("[options] <files ...>");
 // register an empty action handler so that commander.js can throw on
@@ -178,8 +177,8 @@ commander.usage("[options] <files ...>");
 commander.action(() => {});
 
 export type CmdOptions = {
-  babelOptions: Object,
+  babelOptions: any;
-  cliOptions: Object,
+  cliOptions: any;
 };
 
 export default function parseArgv(args: Array<string>): CmdOptions | null {

packages/babel-cli/src/babel/util.ts

@@ -1,5 +1,3 @@
-// @flow
-
 import readdirRecursive from "fs-readdir-recursive";
 import * as babel from "@babel/core";
 import path from "path";
@@ -47,7 +45,7 @@ export function readdirForCompilable(
  */
 export function isCompilableExtension(
   filename: string,
-  altExts?: Array<string>,
+  altExts?: readonly string[],
 ): boolean {
   const exts = altExts || babel.DEFAULT_EXTENSIONS;
   const ext = path.extname(filename);
@@ -65,8 +63,8 @@ const CALLER = {
 export function transform(
   filename: string,
   code: string,
-  opts: Object,
+  opts: any,
-): Promise<Object> {
+): Promise<any> {
   opts = {
     ...opts,
     caller: CALLER,
@@ -81,10 +79,7 @@ export function transform(
   });
 }
 
-export function compile(
+export function compile(filename: string, opts: any | Function): Promise<any> {
-  filename: string,
-  opts: Object | Function,
-): Promise<Object> {
   opts = {
     ...opts,
     caller: CALLER,
@@ -119,7 +114,7 @@ process.on("uncaughtException", function (err) {
   process.exitCode = 1;
 });
 
-export function requireChokidar(): Object {
+export function requireChokidar(): any {
   // $FlowIgnore - https://github.com/facebook/flow/issues/6913#issuecomment-662787504
   const require = createRequire(import /*::("")*/.meta.url);