move source map declaration to its own line

frontend/app/rollup.config.mjs

@@ -23,6 +23,7 @@ import fs from "fs-extra";
 import path from "path";
 import rimraf from "rimraf";
 import { fileURLToPath } from "url";
+import { sourcemapNewline } from "../sourcemapNewline.mjs";
 
 const dirname = path.dirname(fileURLToPath(import.meta.url));
 
@@ -403,6 +404,7 @@ export default {
             ],
             hook: "generateBundle",
         }),
+        sourcemapNewline(),
     ],
     watch: {
         clearScreen: false,

frontend/openchat-service-worker/rollup.config.mjs

@@ -5,6 +5,7 @@ import resolve from "@rollup/plugin-node-resolve";
 import terser from "@rollup/plugin-terser";
 import typescript from "@rollup/plugin-typescript";
 import del from "rollup-plugin-delete";
+import { sourcemapNewline } from "../sourcemapNewline.mjs";
 
 export default {
     input: `./src/service_worker.ts`,
@@ -27,5 +28,6 @@ export default {
             dedupe: ["@dfinity/candid"],
         }),
         terser(),
+        sourcemapNewline(),
     ],
 };

frontend/openchat-worker/rollup.config.mjs

@@ -5,6 +5,7 @@ import resolve from "@rollup/plugin-node-resolve";
 import terser from "@rollup/plugin-terser";
 import typescript from "@rollup/plugin-typescript";
 import del from "rollup-plugin-delete";
+import { sourcemapNewline } from "../sourcemapNewline.mjs";
 
 export default {
     input: `./src/worker.ts`,
@@ -26,5 +27,6 @@ export default {
             preferBuiltins: false,
         }),
         terser(),
+        sourcemapNewline(),
     ],
 };

frontend/sourcemapNewline.mjs

@@ -0,0 +1,18 @@
+export function sourcemapNewline() {
+    return {
+        name: "sourcemap-newline",
+        generateBundle(_, bundle) {
+            for (const fileName in bundle) {
+                const chunk = bundle[fileName];
+                if (chunk.type === "chunk") {
+                    const sourceMappingRegex = /(\/\/[@#] sourceMappingURL=.+)(\r?\n)?$/;
+                    const match = chunk.code.match(sourceMappingRegex);
+
+                    if (match) {
+                        chunk.code = chunk.code.replace(sourceMappingRegex, "\n$1\n");
+                    }
+                }
+            }
+        },
+    };
+}