Open app after installation from pkg file in Mac

Question

I've created a SampleApp.app file from XCode 7.1 and converted it to pkg file and signed it using the product build command and it worked fine. But now the problem is, when I install the pkg the app does not start automatically after installation. Do I need to include any other arguments in my command to make this work? Below is the command that I use to create and sign the pkg.

productbuild --component SampleApp.app /Applications SampleApp.pkg

productsign --sign "Developer ID Installer: xxxxx" SampleApp.pkg SampleApp_signed.pkg

EDIT

I've also tried to add a postinstall script but that didnt seem to work, I'm not sure if its the problem with my script or command

pkgbuild --root SampleApp.app --identifier com.companyname.SampleApp --scripts startup.sh --install-location /Applications/SampleApp.app SampleApp.pkg

productsign --sign "Developer ID Installer: xxxxx" SampleApp.pkg SampleApp_signed.pkg

My startup.sh file

#!/bin/bash

open -a /Applications/SampleApp.app

exit 0

Answer 1

Usually you would create a postinstall script, and include it with the --scripts option.

--scripts scripts-path

The contents of scripts-path is added to the product archive for use by system.run() commands in the distribution. This is valid only for product archives targeted to the OS X Installer application.

So a (very) basic example of postinstall could launch an app by:

#!/bin/sh

open /path/to/your/app
exit 0