move to gts

.npmrc

@@ -0,0 +1 @@
+strict-peer-dependents=true

addon/.prettierrc.cjs

@@ -1,5 +1,14 @@
 'use strict';
 
 module.exports = {
-  singleQuote: true,
+  plugins: ['prettier-plugin-ember-template-tag'],
+  templateSingleQuote: false,
+  overrides: [
+    {
+      files: '*.{js,ts,cjs,mjs,gjs,gts}',
+      options: {
+        singleQuote: true,
+      },
+    },
+  ],
 };

addon/babel.config.json

@@ -1,5 +1,13 @@
 {
   "plugins": [
+    [
+      "@babel/plugin-transform-typescript",
+      {
+        "allExtensions": true,
+        "onlyRemoveTypeImports": true,
+        "allowDeclareFields": true
+      }
+    ],
     "@embroider/addon-dev/template-colocation-plugin",
     [
       "babel-plugin-ember-template-compilation",

addon/eslint.config.mjs

@@ -0,0 +1,136 @@
+/**
+ * Debugging:
+ *   https://eslint.org/docs/latest/use/configure/debug
+ *  ----------------------------------------------------
+ *
+ *   Print a file's calculated configuration
+ *
+ *     npx eslint --print-config path/to/file.js
+ *
+ *   Inspecting the config
+ *
+ *     npx eslint --inspect-config
+ *
+ */
+import globals from 'globals';
+import js from '@eslint/js';
+
+import ts from 'typescript-eslint';
+
+import ember from 'eslint-plugin-ember/recommended';
+import imports from 'eslint-plugin-import';
+
+import prettier from 'eslint-plugin-prettier/recommended';
+import n from 'eslint-plugin-n';
+
+import babelParser from '@babel/eslint-parser';
+
+const parserOptions = {
+  esm: {
+    js: {
+      ecmaFeatures: { modules: true },
+      ecmaVersion: 'latest',
+    },
+    ts: {
+      projectService: true,
+      tsconfigRootDir: import.meta.dirname,
+    },
+  },
+};
+
+export default ts.config(
+  js.configs.recommended,
+  ember.configs.base,
+  ember.configs.gjs,
+  ember.configs.gts,
+  prettier,
+  /**
+   * Ignores must be in their own object
+   * https://eslint.org/docs/latest/use/configure/ignore
+   */
+  {
+    ignores: ['dist/', 'declarations/', 'node_modules/', 'coverage/', '!**/.*'],
+  },
+  /**
+   * https://eslint.org/docs/latest/use/configure/configuration-files#configuring-linter-options
+   */
+  {
+    linterOptions: {
+      reportUnusedDisableDirectives: 'error',
+    },
+  },
+  {
+    files: ['**/*.js'],
+    languageOptions: {
+      parser: babelParser,
+    },
+  },
+  {
+    files: ['**/*.{js,gjs}'],
+    languageOptions: {
+      parserOptions: parserOptions.esm.js,
+      globals: {
+        ...globals.browser,
+      },
+    },
+  },
+  {
+    files: ['**/*.ts'],
+    languageOptions: {
+      parserOptions: parserOptions.esm.ts,
+    },
+    extends: [ember.configs.base, ...ts.configs.recommendedTypeChecked],
+  },
+  {
+    files: ['**/*.gts'],
+    languageOptions: {
+      parser: ember.parser,
+      parserOptions: parserOptions.esm.ts,
+    },
+    extends: [...ts.configs.recommendedTypeChecked, ember.configs.gts],
+  },
+  {
+    files: ['**/*.{js,gjs,ts,gts}'],
+    plugins: {
+      import: imports,
+    },
+    rules: {
+      'import/extensions': ['error', 'always', { ignorePackages: true }],
+    },
+  },
+  /**
+   * CJS node files
+   */
+  {
+    files: ['**/*.cjs'],
+    plugins: {
+      n,
+    },
+
+    languageOptions: {
+      sourceType: 'script',
+      ecmaVersion: 'latest',
+      globals: {
+        ...globals.node,
+      },
+    },
+  },
+  /**
+   * ESM node files
+   */
+  {
+    files: ['**/*.mjs'],
+    plugins: {
+      n,
+    },
+
+    languageOptions: {
+      sourceType: 'module',
+      ecmaVersion: 'latest',
+      parserOptions: parserOptions.esm.js,
+      globals: {
+        ...globals.node,
+      },
+    },
+  },
+);