Support import-equals w/ ns.access

packages/knip/fixtures/import-equals/index.ts

@@ -0,0 +1,4 @@
+import * as NS from './my-module.js';
+import local = require('./local.js');
+import external = require('external');
+import something = NS.something;

packages/knip/fixtures/import-equals/local.ts

@@ -0,0 +1 @@
+export default () => 1

packages/knip/fixtures/import-equals/my-module.ts

@@ -0,0 +1 @@
+export const something = {};

packages/knip/fixtures/import-equals/package.json

@@ -0,0 +1,6 @@
+{
+  "name": "@fixtures/import-equals",
+  "dependencies": {
+    "external": "*"
+  }
+}

packages/knip/fixtures/import-equals/tsconfig.json

@@ -0,0 +1 @@
+{}

packages/knip/src/typescript/getImportsAndExports.ts

@@ -347,6 +347,17 @@ const getImportsAndExports = (
       }
     }
 
+    if (
+      isTopLevel &&
+      ts.isImportEqualsDeclaration(node) &&
+      ts.isQualifiedName(node.moduleReference) &&
+      ts.isIdentifier(node.moduleReference.left)
+    ) {
+      // Pattern: import name = NS.identifier
+      const { left, right } = node.moduleReference;
+      if (sourceFile.locals?.get(left.text)) maybeAddAccessExpressionAsNsImport(left.text, right.text);
+    }
+
     if (ts.isTypeReferenceNode(node) && ts.isQualifiedName(node.typeName)) {
       const [ns, ...right] = [node.typeName.left.getText(), node.typeName.right.getText()].join('.').split('.');
       const members = right.map((_r, index) => right.slice(0, index + 1).join('.'));

packages/knip/test/import-equals.test.ts

@@ -0,0 +1,21 @@
+import { test } from 'bun:test';
+import assert from 'node:assert/strict';
+import { main } from '../src/index.js';
+import { resolve } from '../src/util/path.js';
+import baseArguments from './helpers/baseArguments.js';
+import baseCounters from './helpers/baseCounters.js';
+
+const cwd = resolve('fixtures/import-equals');
+
+test('Find used exports through import-equal NS.member access', async () => {
+  const { counters } = await main({
+    ...baseArguments,
+    cwd,
+  });
+
+  assert.deepEqual(counters, {
+    ...baseCounters,
+    processed: 3,
+    total: 3,
+  });
+});