chore: convert repository to ESM

.yarnrc.yml

@@ -40,5 +40,5 @@ npmPreapprovedPackages:
 
 # Protect the runtime of calls to "yarn run" scripts using a local plugin.
 plugins:
-  - path: ./lavamoat/plugin-allow-scripts.js
-  - path: ./lavamoat/.runner-plugin.js
+  - path: ./lavamoat/plugin-allow-scripts.cjs
+  - path: ./lavamoat/.runner-plugin.cjs

eslint.config.mjs

@@ -28,6 +28,9 @@ const config = createConfig([
       // Handled by Oxfmt.
       'prettier/prettier': 'off',
       'import-x/order': 'off',
+
+      // Does not make sense with ESM.
+      'import-x/no-useless-path-segments': 'off',
     },
   },
 

lavamoat/scripts.build.json

@@ -0,0 +1,15 @@
+{
+  "notes": "Should prevent basic malicious behavior of writing to locations outside the project and sending network requests, but not break any of the advanced packages in use. Everything below the net permission can be used to bypass the restrictions by a more sophisticated attacker.",
+  "nodeOptions": {
+    "--disable-warning": "SecurityWarning",
+    "--permission": true,
+    "--allow-fs-read": ["/"],
+    "--allow-fs-write": ["./"],
+    "--allow-net": false,
+    "--allow-child-process": true,
+    "--allow-worker": false,
+    "--allow-addons": false,
+    "--allow-wasi": false,
+    "--allow-inspector": false
+  }
+}

package.json

@@ -13,20 +13,12 @@
   "files": [
     "dist"
   ],
+  "type": "module",
   "sideEffects": false,
-  "main": "./dist/index.cjs",
-  "module": "./dist/index.mjs",
-  "types": "./dist/index.d.cts",
   "exports": {
     ".": {
-      "import": {
-        "types": "./dist/index.d.mts",
-        "default": "./dist/index.mjs"
-      },
-      "require": {
-        "types": "./dist/index.d.cts",
-        "default": "./dist/index.cjs"
-      }
+      "types": "./dist/index.d.ts",
+      "default": "./dist/index.js"
     },
     "./package.json": "./package.json"
   },
@@ -35,7 +27,7 @@
     "registry": "https://registry.npmjs.org/"
   },
   "scripts": {
-    "build": "ts-bridge --project tsconfig.build.json --clean",
+    "build": "tsc --project tsconfig.build.json",
     "build:docs": "typedoc",
     "lint": "yarn lint:eslint && yarn lint:constraints && yarn lint:misc --check && yarn lint:dependencies --check && yarn lint:changelog",
     "lint:changelog": "auto-changelog validate --formatter oxfmt",
@@ -48,21 +40,17 @@
     "lint:fix": "yarn lint:eslint --fix && yarn lint:constraints --fix && yarn lint:misc --write && yarn lint:dependencies:fix && yarn lint:changelog --fix",
     "lint:misc": "oxfmt --ignore-path .gitignore",
     "prepack": "./scripts/prepack.sh",
-    "test": "yarn test:vitest && yarn test:package",
-    "test:vitest": "vitest",
-    "test:watch": "yarn test:vitest --watch",
-    "test:package": "yarn pack --out .yarn/package.tgz && attw .yarn/package.tgz"
+    "test": "vitest",
+    "test:watch": "vitest --watch"
   },
   "devDependencies": {
-    "@arethetypeswrong/cli": "^0.15.3",
     "@lavamoat/allow-scripts": "^5.1.0",
     "@lavamoat/preinstall-always-fail": "^2.0.0",
     "@metamask/auto-changelog": "^6.2.1",
     "@metamask/eslint-config": "^15.0.0",
     "@metamask/eslint-config-nodejs": "^15.0.0",
     "@metamask/eslint-config-typescript": "^15.0.0",
     "@metamask/eslint-config-vitest": "^15.0.0",
-    "@ts-bridge/cli": "^0.6.3",
     "@types/node": "^18.18",
     "@typescript-eslint/utils": "^8.6.0",
     "@vitest/coverage-istanbul": "^4.1.4",
@@ -78,7 +66,6 @@
     "eslint-plugin-prettier": "^5.2.1",
     "eslint-plugin-promise": "^7.1.0",
     "oxfmt": "^0.45.0",
-    "ts-node": "^10.7.0",
     "typedoc": "^0.26.11",
     "typescript": "~5.7.3",
     "typescript-eslint": "^8.48.1",
@@ -107,6 +94,7 @@
   },
   "scriptsConfig": {
     "#default": "lavamoat/scripts.strict.json",
+    "build": "lavamoat/scripts.build.json",
     "lint": "lavamoat/scripts.yarn.json",
     "lint:changelog": "lavamoat/scripts.lint.json",
     "lint:constraints": "lavamoat/scripts.yarn.json",
@@ -117,9 +105,7 @@
     "lint:fix": "lavamoat/scripts.yarn.json",
     "lint:misc": "lavamoat/scripts.lint.json",
     "prepack": "lavamoat/scripts.yarn.json",
-    "test": "lavamoat/scripts.yarn.json",
-    "test:vitest": "lavamoat/scripts.test.json",
-    "test:package": "lavamoat/scripts.test.json",
+    "test": "lavamoat/scripts.test.json",
     "test:watch": "lavamoat/scripts.test.json"
   }
 }

src/index.test-d.ts

@@ -1,6 +1,6 @@
 import { describe, it, expectTypeOf } from 'vitest';
 
-import greeter from '.';
+import greeter from './index.js';
 
 describe('greeter', () => {
   it('returns a string', () => {

src/index.test.ts

@@ -1,6 +1,6 @@
 import { describe, it, expect } from 'vitest';
 
-import greeter from '.';
+import greeter from './index.js';
 
 describe('greeter', () => {
   it('greets', () => {

tsconfig.build.json

@@ -3,7 +3,6 @@
   "compilerOptions": {
     "declaration": true,
     "declarationMap": true,
-    "emitDeclarationOnly": true,
     "inlineSources": true,
     "noEmit": false,
     "outDir": "dist",

yarn.config.cjs

@@ -289,18 +289,10 @@ module.exports = defineConfig({
     // The package must specify Yarn as the package manager, with a sha256 hash.
     expectYarnPackageManager(workspace);
 
-    // The package must provide the location of the CommonJS-compatible
-    // entrypoint and its matching type declaration file.
-    workspace.set('main', './dist/index.cjs');
-    workspace.set('exports["."].require.default', './dist/index.cjs');
-    workspace.set('types', './dist/index.d.cts');
-    workspace.set('exports["."].require.types', './dist/index.d.cts');
-
-    // The package must provide the location of the ESM-compatible JavaScript
-    // entrypoint and its matching type declaration file.
-    workspace.set('module', './dist/index.mjs');
-    workspace.set('exports["."].import.default', './dist/index.mjs');
-    workspace.set('exports["."].import.types', './dist/index.d.mts');
+    // The package must provide the location of the CommonJS- and ESM-compatible
+    // JavaScript entrypoint and its matching type declaration file.
+    workspace.set('exports["."].default', './dist/index.js');
+    workspace.set('exports["."].types', './dist/index.d.ts');
 
     // The package must export a `package.json` file.
     workspace.set('exports["./package.json"]', './package.json');