Set up uploading source maps to github pages

webpack/webpack.prod.js

@@ -1,13 +1,32 @@
 /* eslint-disable @typescript-eslint/no-var-requires */
+const { SourceMapDevToolPlugin } = require('webpack');
 const { merge } = require('webpack-merge');
 const common = require('./webpack.common.js');
 
+function createGHPSourceMapURL(env) {
+    const manifest = require("../manifest/manifest.json");
+    const version = manifest.version;
+    const [owner, repo_name] = (process.env.GITHUB_REPOSITORY ?? "ajayyy/SponsorBlock").split("/");
+    return `https://${owner.toLowerCase()}.github.io/${repo_name}/${env.browser}${env.stream === "beta" ? "-beta" : ""}/${version}/`;
+}
+
 module.exports = env => {
     let mode = "production";
     env.mode = mode;
 
     return merge(common(env), {
         mode,
-        devtool: "source-map",
+        ...(env.ghpSourceMaps
+            ? {
+                devtool: false,
+                plugins: [new SourceMapDevToolPlugin({
+                    publicPath: createGHPSourceMapURL(env),
+                    filename: '[file].map[query]',
+                })],
+            }
+            : {
+                devtool: "source-map",
+            }
+        ),
     });
 };