Use a wrapper script to launch the app installed with homebrew

Electron looks for the "Helper" app inside of the ".app" directory
and this path depends on the executable that started the app.
If the executable is invoked indirectly through a symlink, Electron
will look for the "Helper" in the wrong directory.

Instead of symlinking the executable, create a script that starts
the application using the full path.

.github/workflows/build.yml

@@ -104,7 +104,15 @@ jobs:
  name "openfortivpn-webview"
  homepage "https://github.com/${{ github.repository_owner }}/openfortivpn-webview"
 
- binary "#{staged_path}/openfortivpn-webview.app/Contents/MacOS/openfortivpn-webview"
+ wrapper_script = "#{staged_path}/openfortivpn-webview.sh"
+ binary wrapper_script, target: "openfortivpn-webview"
+
+ preflight do
+ File.write wrapper_script, <<~EOS
+ #!/bin/sh
+ "#{staged_path}/openfortivpn-webview.app/Contents/MacOS/openfortivpn-webview" "$@"
+ EOS
+ end
 
  zap trash: "~/Library/Application Support/openfortivpn-webview/"
  end