Introduced TypeScript (#41)

* chore: Configured eslint and prettier

* chore: Installed typescript

* chore: Patched @codemod-utils packages

* chore: Updated file extension

* chore: Added types

* chore: Fixed capitalization

* bugfix: Prevented typescript from compiling or type-checking blueprints

---------

Co-authored-by: ijlee2 <[email protected]>

Author: ijlee2

.eslintignore

@@ -1,5 +1,6 @@
 # compiled output
 /dist/
+/dist-for-testing/
 /tmp/
 
 # dependencies
@@ -8,5 +9,5 @@
 # misc
 !.*
 .*/
-/src/blueprints/
+/blueprints/
 /tests/fixtures/

.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 +1,5 @@
 # compiled output
-/dist/
+/dist-for-testing/
 /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,

README.md

@@ -102,7 +102,12 @@ To better meet your needs, consider cloning the repo and running the codemod loc
 
 ```sh
 cd <your/cloned/repo>
-./bin/ember-codemod-v1-to-v2.js --root=<your/project/path>
+
+# Compile TypeScript
+pnpm build
+
+# Run codemod
+./dist/bin/ember-codemod-v1-to-v2.js --root=<your/project/path>
 ```
 
 You can also look at another codemod called [`ember-addon-migrator`](https://github.com/NullVoxPopuli/ember-addon-migrator).

bin/ember-codemod-v1-to-v2.js renamed to bin/ember-codemod-v1-to-v2.ts

@@ -1,16 +1,18 @@
 #!/usr/bin/env node
+// eslint-disable-next-line n/shebang
 '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-v1-to-v2';
 
 // Set codemod options
-const { argv } = yargs(hideBin(process.argv))
+const argv = yargs(hideBin(process.argv))
   .option('addon-location', {
     describe: 'Location of the addon package',
     type: 'string',
@@ -26,13 +28,14 @@ const { argv } = yargs(hideBin(process.argv))
   .option('test-app-name', {
     describe: 'Name of the test-app package',
     type: 'string',
-  });
+  })
+  .parseSync();
 
-function castEmptyStringToUndefined(string) {
-  return string === '' ? undefined : string;
+function castEmptyStringToUndefined(value?: string): string | undefined {
+  return value === '' ? undefined : value;
 }
 
-const codemodOptions = {
+const codemodOptions: CodemodOptions = {
   addonLocation: castEmptyStringToUndefined(argv['addon-location']),
   projectRoot: argv['root'] ?? process.cwd(),
   testAppLocation: castEmptyStringToUndefined(argv['test-app-location']),