fix: force no caching via addDependency hack

src/loader.test.ts

@@ -128,7 +128,11 @@ describe('loader', () => {
   it('throws if async is not available', () => {
     let caught = false;
     try {
-      loader.call({ async: () => null, cacheable: () => {} });
+      loader.call({
+        async: () => null,
+        cacheable: jest.fn(),
+        addDependency: jest.fn(),
+      });
     } catch (e) {
       caught = true;
       expect(e.message).toBe(
@@ -151,7 +155,8 @@ describe('loader', () => {
     loader.call(
       {
         async: () => callback,
-        cacheable: () => {},
+        cacheable: jest.fn(),
+        addDependency: jest.fn(),
         resourcePath: require.resolve('./__example-files__/simple.preval.ts'),
       },
       ''
@@ -174,7 +179,8 @@ describe('loader', () => {
       {
         async: () => callback,
         resource: 'test-resource',
-        cacheable: () => {},
+        cacheable: jest.fn(),
+        addDependency: jest.fn(),
         resourcePath: require.resolve('./__example-files__/throws.preval.ts'),
       },
       ''

src/loader.ts

@@ -1,4 +1,5 @@
 import fs from 'fs';
+import path from 'path';
 import type webpack from 'webpack';
 import requireFromString from 'require-from-string';
 // @ts-expect-error
@@ -140,6 +141,15 @@ const loader = function (
 
   this.cacheable(false);
 
+  // TODO: add comment (this implementation will be refined later)
+  const depFileFilename = path.resolve(
+    __dirname,
+    '.next-plugin-preval-depfile'
+  );
+  fs.writeFileSync(depFileFilename, Math.random().toString());
+
+  this.addDependency(depFileFilename);
+
   if (!callback) {
     throw new PrevalError(
       'Async was not supported by webpack. Please open an issue in next-plugin-preval.'