Add lumen bootstrap

[KenoKokoro]

Lumen bootstrap class. Laravel bootstrap can't be used for Lumen since it doesn't have the bootstrap/autoload.php file and it needs to instantiate the Laravel\Lumen\Application instead of the Illuminate\Contracts\Http\Kernel class.

[marcj]

Then I'd adjust https://github.com/php-pm/php-pm-httpkernel/blob/master/Bootstraps/Laravel.php instead of writing a whole new class.

[KenoKokoro]

The bootstrap is different than the Laravel's. It diverse with the autoload.php file, and the Application instance as well.
Why would you like complicated method with conditions, instead of single and simple class?
My suggestion is to leave the lumen class. It follows the single responsibility principle as well.
Or, if you don't like the duplicating code on the rest of the methods, just wrap them in parent class, and leave the getApplication() method on Laravel and Lumen class.

This is just my suggestion and opinion, something that I would do.

[andig]

Can this be closed now that #68 has been merged?

[andig]

ping @KenoKokoro is this still relevant?

[KenoKokoro]

@andig
I am not sure, I was just experimenting then with the Lumen framework, but as I can see on the Lumen repository, the bootstrap file is still under bootstrap/app.php so seems that should be relevant.

[andig]

I'm closing this PR as implemented after having taken another look at https://github.com/php-pm/php-pm-httpkernel/blob/master/Bootstraps/Laravel.php. At this time, Laravel bootstrap supports both Laravel and Lumen.

Only thing remaining from usability perspective might be to subclass Laravel bootstrap as Lumen without adding any new functionality just to make this more obvious to the user, but that would be another PR.

Thank you for your contribution and staying with us through the discussion!