feat(electron): update post-install script to include patching for electron-builder file system constants

scripts/patch-electron-builder-fs.cjs

@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+const fs = require("node:fs");
+const path = require("node:path");
+
+const root = path.join(__dirname, "..");
+const targets = [path.join(root, "node_modules", "app-builder-lib", "out", "binDownload.js")];
+
+const preamble = `const __ebFsConstants = (() => {
+  try {
+    const c = require("fs").constants;
+    if (c && c.R_OK != null) {
+      return c;
+    }
+  } catch (_) {}
+  try {
+    const c = require("node:fs").constants;
+    if (c && c.R_OK != null) {
+      return c;
+    }
+  } catch (_) {}
+  return { R_OK: 4, W_OK: 2, X_OK: 1 };
+})();
+
+`;
+
+function patchBinDownload(source) {
+    if (source.includes("__ebFsConstants")) {
+        return source;
+    }
+    let next = preamble + source;
+    next = next.replace(/fs_1\.constants\.R_OK/g, "__ebFsConstants.R_OK");
+    next = next.replace(/fs_1\.constants\.W_OK/g, "__ebFsConstants.W_OK");
+    next = next.replace(/fs\.constants\.R_OK/g, "__ebFsConstants.R_OK");
+    next = next.replace(/fs\.constants\.W_OK/g, "__ebFsConstants.W_OK");
+    return next;
+}
+
+for (const target of targets) {
+    if (!fs.existsSync(target)) {
+        continue;
+    }
+    const original = fs.readFileSync(target, "utf8");
+    const patched = patchBinDownload(original);
+    if (patched !== original) {
+        fs.writeFileSync(target, patched);
+        console.log(`patched ${path.relative(root, target)}`);
+    }
+}