Detect when Android emulator is fully booted

I want to create a script where I start an emulator and after the system is fully booted, I want to install an .apk.

How can I know when the emulator is fully booted so I can run the install command? Here http://developer.android.com/guide/developing/tools/adb.html it is said that adb wait-for-device install .apk is not correct.

So how can I achieve this? Is it possible? Is my only option to sleep for a few minutes until I can be sure that the emulator is started?