Read injected.js from main process.

Signed-off-by: Anders Kaseorg <[email protected]>

Author: andersk

app/common/typed-ipc.ts

@@ -7,6 +7,7 @@ export type MainMessage = {
   "fetch-user-agent": () => string;
   "focus-app": () => void;
   "focus-this-webview": () => void;
+  "get-injected-js": () => string;
   "permission-callback": (permissionCallbackId: number, grant: boolean) => void;
   "quit-app": () => void;
   "realm-icon-changed": (serverURL: string, iconURL: string) => void;

app/main/index.ts

@@ -1,5 +1,6 @@
 import type {IpcMainEvent, WebContents} from "electron/main";
 import {BrowserWindow, app, dialog, powerMonitor, session} from "electron/main";
+import fs from "node:fs";
 import path from "node:path";
 import process from "node:process";
 
@@ -202,6 +203,13 @@ function createMainWindow(): BrowserWindow {
   configureSpellChecker();
   ipcMain.on("configure-spell-checker", configureSpellChecker);
 
+  ipcMain.on("get-injected-js", (event) => {
+    event.returnValue = fs.readFileSync(
+      path.join(bundlePath, "injected.js"),
+      "utf8",
+    );
+  });
+
   AppMenu.setMenu({
     tabs: [],
   });

app/renderer/js/preload.ts

@@ -1,8 +1,4 @@
 import {contextBridge, webFrame} from "electron/renderer";
-import fs from "node:fs";
-import path from "node:path";
-
-import {bundlePath} from "../../common/paths.js";
 
 import electron_bridge, {bridgeEvents} from "./electron-bridge.js";
 import * as NetworkError from "./pages/network.js";
@@ -79,6 +75,4 @@ window.addEventListener("load", () => {
 });
 
 (async () =>
-  webFrame.executeJavaScript(
-    fs.readFileSync(path.join(bundlePath, "injected.js"), "utf8"),
-  ))();
+  webFrame.executeJavaScript(ipcRenderer.sendSync("get-injected-js")))();