refactor(build): update TypeScript and Rollup configuration

rollup.config.ts

@@ -1,19 +1,18 @@
-import commonjs from '@rollup/plugin-commonjs';
-import resolve from '@rollup/plugin-node-resolve';
-import typescript from '@rollup/plugin-typescript';
+// See: https://rollupjs.org/introduction/
+
+import commonjs from '@rollup/plugin-commonjs'
+import nodeResolve from '@rollup/plugin-node-resolve'
+import typescript from '@rollup/plugin-typescript'
 
 const config = {
-  input: 'src/main.ts',
+  input: 'src/index.ts',
   output: {
+    esModule: true,
     file: 'dist/index.js',
-    format: 'cjs',
+    format: 'es',
     sourcemap: true
   },
-  plugins: [
-    resolve(),
-    commonjs(),
-    typescript()
-  ]
-};
+  plugins: [typescript(), nodeResolve({ preferBuiltins: true }), commonjs()]
+}
 
-export default config;
+export default config

src/index.ts

@@ -0,0 +1,8 @@
+/**
+ * The entrypoint for the action. This file simply imports and runs the action's
+ * main logic.
+ */
+import { run } from './main.js'
+
+/* istanbul ignore next */
+run()

tsconfig.base.json

@@ -0,0 +1,22 @@
+{
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "compilerOptions": {
+    "allowSyntheticDefaultImports": true,
+    "declaration": false,
+    "declarationMap": false,
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "lib": ["ES2022"],
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "newLine": "lf",
+    "noImplicitAny": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": false,
+    "pretty": true,
+    "resolveJsonModule": true,
+    "strict": true,
+    "strictNullChecks": true,
+    "target": "ES2022"
+  }
+}

tsconfig.json

@@ -1,20 +1,11 @@
 {
+  "$schema": "https://json.schemastore.org/tsconfig",
+  "extends": "./tsconfig.base.json",
   "compilerOptions": {
-    "target": "es2020", /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020' or 'ESNEXT'. */
-    "module": "NodeNext", /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', or 'ESNext'. */
-    "outDir": "./lib", /* Redirect output structure to the directory. */
-    "rootDir": "./src", /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
-    "strict": true, /* Enable all strict type-checking options. */
-    "noImplicitAny": true, /* Raise error on expressions and declarations with an implied 'any' type. */
-    "esModuleInterop": true, /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
-    "baseUrl": "./",
-    "paths": {
-      "*": ["src/*"]
-    }
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "outDir": "./dist"
   },
-  "exclude": [
-    "node_modules",
-    "**/*.test.ts",
-    "vitest.config.ts"
-  ]
+  "exclude": ["__fixtures__", "__tests__", "coverage", "dist", "node_modules"],
+  "include": ["src"]
 }