Electron Forge Post Package Hook for Deep Signing on Mac

forge.config.js

hooks: {
  postPackage: (forgeConfig, options) => {
    if (process.platform == "darwin") {
      let appPath = path.resolve(options.outputPaths[0], 'CHANGEME.app');
      console.log(`Signing App: ${appPath}`);
      exec(`codesign --force --deep --sign - ${appPath}`,
      (err, stdout, stderr) => {
        if (err) {
          console.log(`ERROR: ${err}`);
        }
        if (stdout) {
          console.log(stdout);
        }
        if (stderr) {
          console.log(stderr);
        }
      });
    }
  }
},