From bd94161e5afd6680a726597e9e5767b43b6c9c5f Mon Sep 17 00:00:00 2001
From: tada5hi <peter.placzek1996@gmail.com>
Date: Tue, 6 Dec 2022 17:34:42 +0100
Subject: [PATCH] fix(terser): __filename not defined

---
 CODEOWNERS                    |  1 +
 packages/terser/src/module.ts | 19 +++++++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/CODEOWNERS b/CODEOWNERS
index 71a6bc0b7..35faf7426 100644
--- a/CODEOWNERS
+++ b/CODEOWNERS
@@ -3,3 +3,4 @@
 /packages/babel/ @Andarist
 /packages/image/ @tjenkinson
 /packages/node-resolve/ @tjenkinson
+/packages/terser/ @tada5hi
diff --git a/packages/terser/src/module.ts b/packages/terser/src/module.ts
index c6264c5a0..5f86c26ea 100644
--- a/packages/terser/src/module.ts
+++ b/packages/terser/src/module.ts
@@ -1,3 +1,5 @@
+import { fileURLToPath } from 'url';
+
 import type { NormalizedOutputOptions, RenderedChunk } from 'rollup';
 import { hasOwnProperty, isObject, merge } from 'smob';
 
@@ -5,6 +7,23 @@ import type { Options } from './type';
 import { WorkerPool } from './worker-pool';
 
 export default function terser(options: Options = {}) {
+  let filePath: string | undefined;
+
+  if (typeof __filename !== 'undefined') {
+    filePath = __filename;
+  } else {
+    // @ts-ignore
+    // eslint-disable-next-line no-lonely-if
+    if (typeof import.meta !== 'undefined') {
+      // @ts-ignore
+      filePath = fileURLToPath(import.meta.url);
+    }
+  }
+
+  if (typeof filePath === 'undefined') {
+    throw new Error('File path could not be determined.');
+  }
+
   const workerPool = new WorkerPool({
     filePath: __filename,
     maxWorkers: options.maxWorkers