Support build-time specified protocol scheme for oidc callback (#2285)

src/build-config.ts

@@ -0,0 +1,26 @@
+/*
+Copyright 2025 New Vector Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE files in the repository root for full details.
+*/
+
+import path, { dirname } from "node:path";
+import { fileURLToPath } from "node:url";
+
+import { type JsonObject, loadJsonFile } from "./utils.js";
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+interface BuildConfig {
+    appId: string;
+    protocol: string;
+}
+
+export function readBuildConfig(): BuildConfig {
+    const packageJson = loadJsonFile(path.join(__dirname, "..", "package.json")) as JsonObject;
+    return {
+        appId: (packageJson["electron_appId"] as string) || "im.riot.app",
+        protocol: (packageJson["electron_protocol"] as string) || "io.element.desktop",
+    };
+}