[Pkg-javascript-devel] Bug#1004471: Pending patch for terser-webpack-plugin in webpack 5 till a new upstream for node-terser is uploaded

[Caleb Adepitan]

Hi,

I just arrived at a working patch for terser-webpack-plugin to circumvent breaking changes in node-terser 5 which is required by the package. The available version of node-terser in debian is 4 which is behind the terser package upstream.

This patch is an ad-hoc fix for the bug pending the node-terser package is updated to a compatible version.

Here is the proposed patch:

https://salsa.debian.org/calebpitan/node-webpack/-/commit/208febe14d117dc134543fd9773c8eca02d1d68c.patch

--- a/terser-webpack-plugin/src/utils.js
+++ b/terser-webpack-plugin/src/utils.js
@@ -264,8 +264,11 @@ async function terserMinify(
  
    // Let terser generate a SourceMap
    if (sourceMap) {
-    // @ts-ignore
-    terserOptions.sourceMap = { asObject: true };
+    const pkg = require("terser/package.json")
+    if (parseInt(pkg.version) > 4) {
+      // @ts-ignore
+      terserOptions.sourceMap = { asObject: true };
+    }
    }
  
    /** @type {ExtractedComments} */
@@ -284,7 +287,11 @@ async function terserMinify(
    }
  
    const [[filename, code]] = Object.entries(input);
-  const result = await minify({ [filename]: code }, terserOptions);
+  let result = minify({ [filename]: code }, terserOptions);
+
+  if (result instanceof Promise) {
+    result = await result
+  }
  
    return {
      code: /** @type {string} **/ (result.code),
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