Keep both d.ts and d.mts files in esm directory

Author: Brijesh Bittu

packages/mui-types/package.json

@@ -23,9 +23,9 @@
   "scripts": {
     "build": "pnpm build:node && pnpm build:stable && pnpm build:types && pnpm build:copy-files",
     "build:node": "node ../../scripts/build.mjs node",
-    "build:stable": "node ../../scripts/build.mjs stable",
-    "build:types": "tsx ../../scripts/buildTypes.mts",
-    "build:copy-files": "node ../../scripts/copyFiles.mjs",
+    "build:stable": "MUI_EXPERIMENTAL_MJS=true node ../../scripts/build.mjs stable",
+    "build:types": "MUI_EXPERIMENTAL_MJS=true tsx ../../scripts/buildTypes.mts",
+    "build:copy-files": "MUI_EXPERIMENTAL_MJS=true node ../../scripts/copyFiles.mjs",
     "prebuild": "rimraf build",
     "release": "pnpm build && pnpm publish",
     "test": "echo 'No runtime test. Type tests are run with the `typescript` script.'",

scripts/build.mjs

@@ -105,7 +105,6 @@ async function run(argv) {
   const command = ['pnpm babel', ...babelArgs].join(' ');
 
   if (verbose) {
-    // eslint-disable-next-line no-console
     console.log(`running '${command}' with ${JSON.stringify(env)}`);
   }
 
@@ -131,7 +130,6 @@ async function run(argv) {
   }
 
   if (verbose) {
-    // eslint-disable-next-line no-console
     console.log(stdout);
   }
 }

scripts/buildTypes.mts

@@ -4,7 +4,6 @@ import path from 'path';
 import yargs from 'yargs';
 import { $ } from 'execa';
 import * as babel from '@babel/core';
-import { parse } from 'jsonc-parser';
 
 const $$ = $({ stdio: 'inherit' });
 
@@ -84,7 +83,9 @@ async function renameDtsFilesToDmts(sourceDirectory: string) {
   await Promise.all(
     dtsFiles.map(async (dtsFile) => {
       const mtsFile = dtsFile.replace(/\.d\.ts$/, '.d.mts');
-      await fs.rename(dtsFile, mtsFile);
+      // @TODO - Fix this. Temporarily maintaining both .d.ts and .d.mts files to avoid issues with parent packages that
+      // expect .d.ts files to be present.
+      await fs.copyFile(dtsFile, mtsFile);
     }),
   );
 }
@@ -108,7 +109,7 @@ async function main(argv: HandlerArgv) {
   const esmDir = path.join(buildFolder, 'esm');
   const cjsDir = path.join(buildFolder, argv.cjsDir);
 
-  await copyDeclarations(srcPath, esmDir);
+  await copyDeclarations(srcPath, cjsDir);
 
   if (!argv.skipTsc) {
     if (!tsconfigExists) {