From a2fa6e94b8b1c74b47074222854d5bd6777d4121 Mon Sep 17 00:00:00 2001
From: Bert De Block <b.deblock@codeshare.be>
Date: Fri, 21 Nov 2025 12:55:18 +0100
Subject: [PATCH] Use `.mjs` for ember-template-lint and Prettier config files

---
 files/{.prettierrc.cjs => .prettierrc.mjs}                    | 4 +---
 files/{.template-lintrc.cjs => .template-lintrc.mjs}          | 4 +---
 tests/fixtures/default/{.prettierrc.cjs => .prettierrc.mjs}   | 4 +---
 tests/helpers/assertions.ts                                   | 2 +-
 tests/smoke-tests/--addon-only.test.ts                        | 4 ++--
 .../within-existing-monorepo/custom-locations.test.ts         | 2 +-
 tests/smoke-tests/within-existing-monorepo/defaults.test.ts   | 2 +-
 7 files changed, 8 insertions(+), 14 deletions(-)
 rename files/{.prettierrc.cjs => .prettierrc.mjs} (86%)
 rename files/{.template-lintrc.cjs => .template-lintrc.mjs} (65%)
 rename tests/fixtures/default/{.prettierrc.cjs => .prettierrc.mjs} (86%)

diff --git a/files/.prettierrc.cjs b/files/.prettierrc.mjs
similarity index 86%
rename from files/.prettierrc.cjs
rename to files/.prettierrc.mjs
index 8e62a45..9cc6b3d 100644
--- a/files/.prettierrc.cjs
+++ b/files/.prettierrc.mjs
@@ -1,6 +1,4 @@
-'use strict';
-
-module.exports = {
+export default {
   plugins: ['prettier-plugin-ember-template-tag'],
   overrides: [
     {
diff --git a/files/.template-lintrc.cjs b/files/.template-lintrc.mjs
similarity index 65%
rename from files/.template-lintrc.cjs
rename to files/.template-lintrc.mjs
index 2fedce2..8b6625c 100644
--- a/files/.template-lintrc.cjs
+++ b/files/.template-lintrc.mjs
@@ -1,6 +1,4 @@
-'use strict';
-
-module.exports = {
+export default {
   extends: 'recommended',
   checkHbsTemplateLiterals: false,
 };
diff --git a/tests/fixtures/default/.prettierrc.cjs b/tests/fixtures/default/.prettierrc.mjs
similarity index 86%
rename from tests/fixtures/default/.prettierrc.cjs
rename to tests/fixtures/default/.prettierrc.mjs
index 8e62a45..9cc6b3d 100644
--- a/tests/fixtures/default/.prettierrc.cjs
+++ b/tests/fixtures/default/.prettierrc.mjs
@@ -1,6 +1,4 @@
-'use strict';
-
-module.exports = {
+export default {
   plugins: ['prettier-plugin-ember-template-tag'],
   overrides: [
     {
diff --git a/tests/helpers/assertions.ts b/tests/helpers/assertions.ts
index a970a29..70d4ccc 100644
--- a/tests/helpers/assertions.ts
+++ b/tests/helpers/assertions.ts
@@ -47,7 +47,7 @@ export async function assertGeneratedCorrectly({
   }
 
   if (!existingMonorepo) {
-    await matchesFixture('.prettierrc.cjs', { cwd: projectRoot });
+    await matchesFixture('.prettierrc.mjs', { cwd: projectRoot });
 
     await assertCorrectECUJson({
       projectRoot,
diff --git a/tests/smoke-tests/--addon-only.test.ts b/tests/smoke-tests/--addon-only.test.ts
index 6fadc2d..878edcf 100644
--- a/tests/smoke-tests/--addon-only.test.ts
+++ b/tests/smoke-tests/--addon-only.test.ts
@@ -30,8 +30,8 @@ describe.skip('--addon-only', () => {
     expect(rootContents).to.include('.gitignore');
     expect(rootContents).to.include('pnpm-workspace.yaml');
     expect(rootContents).to.include('.prettierignore');
-    expect(rootContents).to.include('.prettierrc.cjs');
-    expect(rootContents).to.include('.template-lintrc.cjs');
+    expect(rootContents).to.include('.prettierrc.mjs');
+    expect(rootContents).to.include('.template-lintrc.mjs');
     expect(rootContents).to.include('CONTRIBUTING.md');
     expect(rootContents).to.include('LICENSE.md');
     expect(rootContents).to.include('README.md');
diff --git a/tests/smoke-tests/within-existing-monorepo/custom-locations.test.ts b/tests/smoke-tests/within-existing-monorepo/custom-locations.test.ts
index 8cbc37b..56e1251 100644
--- a/tests/smoke-tests/within-existing-monorepo/custom-locations.test.ts
+++ b/tests/smoke-tests/within-existing-monorepo/custom-locations.test.ts
@@ -14,7 +14,7 @@ import {
 } from '../../helpers.js';
 
 let commonFixtures = {
-  '.prettierrc.cjs': await readFixture('.prettierrc.cjs'),
+  '.prettierrc.mjs': await readFixture('.prettierrc.mjs'),
 };
 
 describe.skip('custom locations', () => {
diff --git a/tests/smoke-tests/within-existing-monorepo/defaults.test.ts b/tests/smoke-tests/within-existing-monorepo/defaults.test.ts
index fdb3d3b..0c332a2 100644
--- a/tests/smoke-tests/within-existing-monorepo/defaults.test.ts
+++ b/tests/smoke-tests/within-existing-monorepo/defaults.test.ts
@@ -15,7 +15,7 @@ import {
 } from '../../helpers.js';
 
 let commonFixtures = {
-  '.prettierrc.cjs': await readFixture('.prettierrc.cjs'),
+  '.prettierrc.mjs': await readFixture('.prettierrc.mjs'),
 };
 
 for (let packageManager of SUPPORTED_PACKAGE_MANAGERS) {