fix: disable local windows signing for forks PR

Author: giacomocusinato

Diff for: .github/workflows/build.yml

@@ -286,6 +286,8 @@ jobs:
       SIGNTOOL_PATH: "C:/Program Files (x86)/Windows Kits/10/bin/10.0.19041.0/x86/signtool.exe"
       WIN_CERT_PASSWORD: ${{ secrets.INSTALLER_CERT_WINDOWS_PASSWORD }}
       WIN_CERT_CONTAINER_NAME: ${{ secrets.INSTALLER_CERT_WINDOWS_CONTAINER }}
+      WIN_SIGNING_ENABLED: ${{ !github.event.pull_request.head.repo.fork }}
+
     strategy:
       matrix:
         config: ${{ fromJson(needs.select-targets.outputs.build-matrix) }}

Diff for: electron-app/scripts/windowsCustomSign.js

@@ -1,7 +1,14 @@
 const childProcess = require('child_process');
 
 exports.default = async function (configuration) {
-  if (!process.env.GITHUB_ACTIONS) {
+  console.log(
+    'process.env.WIN_SIGNING_ENABLED',
+    process.env.WIN_SIGNING_ENABLED
+  );
+  if (
+    !process.env.GITHUB_ACTIONS ||
+    process.env.WIN_SIGNING_ENABLED !== 'true'
+  ) {
     return;
   }