Introduce TypeScript

.eslintignore

@@ -1,5 +1,6 @@
 # compiled output
 /dist/
+/dist-for-testing/
 /tmp/
 
 # dependencies

.eslintrc.cjs

@@ -2,27 +2,58 @@
 
 module.exports = {
   root: true,
-  parser: '@babel/eslint-parser',
+  parser: '@typescript-eslint/parser',
   parserOptions: {
     ecmaVersion: 'latest',
-    requireConfigFile: false,
     sourceType: 'module',
   },
-  plugins: ['simple-import-sort'],
+  plugins: ['@typescript-eslint', 'simple-import-sort', 'typescript-sort-keys'],
   extends: [
     'eslint:recommended',
     'plugin:import/recommended',
+    'plugin:import/typescript',
     'plugin:n/recommended',
     'plugin:prettier/recommended',
+    'plugin:typescript-sort-keys/recommended',
   ],
   rules: {
     curly: 'error',
     'simple-import-sort/exports': 'error',
     'simple-import-sort/imports': 'error',
   },
-  env: {
-    es6: true,
-    node: true,
+  settings: {
+    'import/resolver': {
+      node: true,
+      typescript: true,
+    },
   },
-  overrides: [],
+  overrides: [
+    // TypeScript files
+    {
+      files: ['**/*.{cts,ts}'],
+      extends: [
+        'plugin:@typescript-eslint/eslint-recommended',
+        'plugin:@typescript-eslint/recommended',
+      ],
+      rules: {
+        '@typescript-eslint/array-type': 'error',
+      },
+    },
+    // TypeScript and JavaScript files
+    {
+      files: ['**/*.{cjs,cts,js,ts}'],
+      rules: {
+        'import/no-duplicates': 'error',
+      },
+    },
+    // Node files
+    {
+      files: ['./.eslintrc.{cjs,js}', './.prettierrc.{cjs,js}'],
+      env: {
+        browser: false,
+        node: true,
+      },
+      extends: ['plugin:n/recommended'],
+    },
+  ],
 };

.gitignore

@@ -1,5 +1,6 @@
 # compiled output
 dist/
+dist-for-testing/
 tmp/
 
 # dependencies

.npmignore

@@ -1,5 +1,4 @@
 # compiled output
-/dist/
 /tmp/
 
 # dependencies

.prettierrc.cjs

@@ -3,7 +3,7 @@
 module.exports = {
   overrides: [
     {
-      files: '*.{cjs,js}',
+      files: '*.{cjs,cts,js,mjs,mts,ts}',
       options: {
         printWidth: 80,
         singleQuote: true,

bin/ember-codemod-pod-to-octane.js → bin/ember-codemod-pod-to-octane.ts

@@ -1,16 +1,16 @@
-#!/usr/bin/env node
 'use strict';
 
 import yargs from 'yargs';
 import { hideBin } from 'yargs/helpers';
 
 import { runCodemod } from '../src/index.js';
+import type { CodemodOptions } from '../src/types/index.js';
 
 // Provide a title to the process in `ps`
 process.title = 'ember-codemod-pod-to-octane';
 
 // Set codemod options
-const { argv } = yargs(hideBin(process.argv))
+const argv = yargs(hideBin(process.argv))
   .option('pod-path', {
     default: '',
     describe: 'Namespace used for the pod layout',
@@ -26,13 +26,14 @@ const { argv } = yargs(hideBin(process.argv))
     type: 'boolean',
   })
   .option('type', {
-    choices: ['addon', 'app', 'engine'],
+    choices: ['addon', 'app', 'engine'] as const,
     demandOption: true,
     describe: 'Type of your Ember project',
     type: 'string',
-  });
+  })
+  .parseSync();
 
-const codemodOptions = {
+const codemodOptions: CodemodOptions = {
   podPath: argv['pod-path'],
   projectRoot: argv['root'] ?? process.cwd(),
   projectType: argv['type'],

package.json

@@ -15,23 +15,35 @@
   "license": "MIT",
   "author": "Isaac J. Lee",
   "type": "module",
-  "main": "src/index.js",
+  "main": "dist/index.js",
+  "types": "dist/index.d.ts",
+  "typesVersions": {
+    "*": {
+      "*": [
+        "dist/*"
+      ]
+    }
+  },
   "bin": "./bin/ember-codemod-pod-to-octane.js",
   "directories": {
     "test": "tests"
   },
   "files": [
-    "bin/",
-    "src/"
+    "dist"
   ],
   "scripts": {
+    "build": "tsc --project tsconfig.build.json",
     "changelog": "lerna-changelog",
-    "lint": "eslint . --cache",
-    "lint:fix": "eslint . --fix",
-    "test": "mt tests --quiet"
+    "lint": "concurrently \"npm:lint:*(!fix)\" --names \"lint:\"",
+    "lint:fix": "concurrently \"npm:lint:*:fix\" --names \"fix:\"",
+    "lint:js": "eslint . --cache",
+    "lint:js:fix": "eslint . --fix",
+    "lint:types": "tsc --noEmit",
+    "prepare": "pnpm build",
+    "test": "tsc --build && mt dist-for-testing --quiet"
   },
   "dependencies": {
-    "@codemod-utils/files": "^0.4.0",
+    "@codemod-utils/files": "^0.4.1",
     "@codemod-utils/json": "^0.3.0",
     "yargs": "^17.7.2"
   },
@@ -40,14 +52,25 @@
     "@babel/eslint-parser": "^7.22.5",
     "@codemod-utils/tests": "^0.2.1",
     "@sondr3/minitest": "^0.1.1",
+    "@tsconfig/esm": "^1.0.3",
+    "@tsconfig/node16": "^1.0.4",
+    "@tsconfig/strictest": "^2.0.1",
+    "@types/node": "^16.11.7",
+    "@types/yargs": "^17.0.24",
+    "@typescript-eslint/eslint-plugin": "^5.59.9",
+    "@typescript-eslint/parser": "^5.59.9",
+    "concurrently": "^8.2.0",
     "eslint": "^8.42.0",
     "eslint-config-prettier": "^8.8.0",
+    "eslint-import-resolver-typescript": "^3.5.5",
     "eslint-plugin-import": "^2.27.5",
     "eslint-plugin-n": "^16.0.0",
     "eslint-plugin-prettier": "^4.2.1",
     "eslint-plugin-simple-import-sort": "^10.0.0",
+    "eslint-plugin-typescript-sort-keys": "^2.3.0",
     "lerna-changelog": "^2.2.0",
-    "prettier": "^2.8.8"
+    "prettier": "^2.8.8",
+    "typescript": "^5.1.3"
   },
   "engines": {
     "node": ">= 16"
@@ -61,5 +84,10 @@
       "enhance: documentation": "Documentation",
       "user feedback": "User Feedback"
     }
+  },
+  "pnpm": {
+    "overrides": {
+      "eslint-plugin-import@2.27.5>tsconfig-paths": "^4.2.0"
+    }
   }
 }