add prettier

.prettierrc.cjs

@@ -0,0 +1,5 @@
+'use strict';
+
+module.exports = {
+  singleQuote: true,
+};

eslint.config.mjs

@@ -1,9 +1,10 @@
-import globals from "globals";
-import pluginJs from "@eslint/js";
-
+import globals from 'globals';
+import pluginJs from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
 
 export default [
-  {files: ["**/*.js"], languageOptions: {sourceType: "commonjs"}},
-  {languageOptions: { globals: globals.node }},
+  { files: ['**/*.js'], languageOptions: { sourceType: 'commonjs' } },
+  { languageOptions: { globals: globals.node } },
   pluginJs.configs.recommended,
-];
+  eslintPluginPrettierRecommended,
+];

files/babel.config.cjs

@@ -7,11 +7,11 @@ let config;
 // function that wraps your whole babel config
 if (
   process.env.EMBROIDER_PREBUILD ||
-  process.env.EMBROIDER_TEST_SETUP_FORCE === "classic"
+  process.env.EMBROIDER_TEST_SETUP_FORCE === 'classic'
 ) {
   config = {};
 } else {
-  config = require("./node_modules/.embroider/_babel_config_");
+  config = require('./node_modules/.embroider/_babel_config_');
 }
 
 module.exports = config;

files/vite.config.mjs

@@ -1,4 +1,4 @@
-import { defineConfig } from "vite";
+import { defineConfig } from 'vite';
 import {
   resolver,
   hbs,
@@ -8,18 +8,18 @@ import {
   compatPrebuild,
   assets,
   contentFor,
-} from "@embroider/vite";
-import { resolve } from "path";
-import { babel } from "@rollup/plugin-babel";
+} from '@embroider/vite';
+import { resolve } from 'path';
+import { babel } from '@rollup/plugin-babel';
 
-const root = "node_modules/.embroider/rewritten-app";
+const root = 'node_modules/.embroider/rewritten-app';
 
 export default defineConfig(({ mode }) => {
   return {
     root,
     // esbuild in vite does not support decorators
     esbuild: false,
-    cacheDir: resolve("node_modules", ".vite"),
+    cacheDir: resolve('node_modules', '.vite'),
     plugins: [
       hbs(),
       templateTag(),
@@ -30,30 +30,30 @@ export default defineConfig(({ mode }) => {
       contentFor(),
 
       babel({
-        babelHelpers: "runtime",
+        babelHelpers: 'runtime',
 
         // this needs .hbs because our hbs() plugin above converts them to
         // javascript but the javascript still also needs babel, but we don't want
         // to rename them because vite isn't great about knowing how to hot-reload
         // them if we resolve them to made-up names.
-        extensions: [".gjs", ".js", ".hbs", ".ts", ".gts"],
+        extensions: ['.gjs', '.js', '.hbs', '.ts', '.gts'],
       }),
     ],
     optimizeDeps: optimizeDeps(),
-    publicDir: resolve(process.cwd(), "public"),
+    publicDir: resolve(process.cwd(), 'public'),
     server: {
       port: 4200,
       watch: {
-        ignored: ["!**/node_modules/.embroider/rewritten-app/**"],
+        ignored: ['!**/node_modules/.embroider/rewritten-app/**'],
       },
     },
     build: {
-      outDir: resolve(process.cwd(), "dist"),
+      outDir: resolve(process.cwd(), 'dist'),
       rollupOptions: {
         input: {
-          main: resolve(root, "index.html"),
+          main: resolve(root, 'index.html'),
           ...(shouldBuildTests(mode)
-            ? { tests: resolve(root, "tests/index.html") }
+            ? { tests: resolve(root, 'tests/index.html') }
             : undefined),
         },
       },
@@ -62,5 +62,5 @@ export default defineConfig(({ mode }) => {
 });
 
 function shouldBuildTests(mode) {
-  return mode !== "production" || process.env.FORCE_BUILD_TESTS;
+  return mode !== 'production' || process.env.FORCE_BUILD_TESTS;
 }

index.js

@@ -20,7 +20,7 @@ module.exports = {
   },
 
   async afterInstall(options) {
-    // there doesn't seem to be a way to tell ember-cli to not prompt to override files that were added in the beforeInstall 
+    // there doesn't seem to be a way to tell ember-cli to not prompt to override files that were added in the beforeInstall
     // so I'm just copying a few over at this stage
     await fs.copy(join(__dirname, 'files-override'), options.target, {
       overwrite: true,
@@ -32,12 +32,12 @@ module.exports = {
       'save-dev': true,
       verbose: false,
       packages: [
-        '@embroider/core@unstable', 
+        '@embroider/core@unstable',
         '@embroider/vite@unstable',
         '@embroider/compat@unstable',
         '@embroider/test-setup@unstable',
         'vite',
-        '@rollup/plugin-babel'
+        '@rollup/plugin-babel',
       ],
       packageManager: options.packageManager,
     });
@@ -55,11 +55,11 @@ module.exports = {
 
     json.scripts = {
       ...json.scripts,
-      "build": "vite build",
-      "start": "vite",
-      "test:ember": "vite build --mode test && ember test --path dist"
+      build: 'vite build',
+      start: 'vite',
+      'test:ember': 'vite build --mode test && ember test --path dist',
     };
 
     await fs.writeFile(packageJson, JSON.stringify(json, null, 2));
   },
-}
+};

package.json

@@ -23,7 +23,10 @@
   "devDependencies": {
     "@eslint/js": "^9.3.0",
     "eslint": "9.x",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-prettier": "^5.1.3",
     "globals": "^15.3.0",
+    "prettier": "^3.2.5",
     "release-plan": "^0.9.0"
   }
 }