Update

src/check-imports.ts

@@ -8,27 +8,39 @@ import { dependencies, peerDependencies } from '../dist/package.json';
 const deps = Object.keys({ ...dependencies, ...peerDependencies }).concat('eslint');
 const builtIn = new Set(builtinModules.flatMap(module => [module, `node:${module}`]));
 
+function findRequires(text: string) {
+  const list = Array.from(text.matchAll(/require\(["']([^"']+)["']\)/g))
+    .map(m => m[1])
+    .filter(
+      module =>
+        !(
+          builtIn.has(module) ||
+          module.startsWith('eslint/') ||
+          module.startsWith('typescript/')
+        ),
+    );
+  return uniq(list);
+}
+
+const moduleMap = glob
+  .sync('dist/**/*.js')
+  .map(path => ({ key: path, value: findRequires(fs.readFileSync(path, 'utf8')) }));
+
 const files = Object.fromEntries(
-  glob
-    .sync('dist/**/*.js')
-    .map(path => [
-      path,
-      uniq(
-        Array.from(fs.readFileSync(path, 'utf8').matchAll(/require\(["']([^"']+)["']\)/g))
-          .map(m => m[1])
-          .filter(
-            module =>
-              !(
-                builtIn.has(module) ||
-                deps.includes(module) ||
-                deps.some(dep => module.startsWith(`${dep}/`)) ||
-                module.startsWith('eslint/') ||
-                module.startsWith('typescript/')
-              ),
-          ),
+  moduleMap
+    .map(({ key, value }) => ({
+      key,
+      value: value.filter(
+        module =>
+          !(deps.includes(module) || deps.some(dep => module.startsWith(`${dep}/`))),
       ),
-    ])
-    .filter(([, modules]) => modules.length > 0),
+    }))
+    .filter(({ value }) => value.length > 0)
+    .map(({ key, value }) => [key, value]),
+);
+const uselessDeps = Object.keys(dependencies).filter(
+  dep => !moduleMap.some(({ value }) => value.includes(dep)),
 );
 
-console.log(files);
+console.log('Missing imports:', files);
+console.log('Unused dependencies:', uselessDeps);