Add debug command

[umulmrum]

Hi,

it would be great to have a debug command like e.g. Symfony has for routing or config. Not sure what exactly this command should show, but what I hope for is a way to see which classes are in which layer(s) so that flaws in the depfile can be found more easily.

Thanks!

[smoench]

Hi, I think there are two possibilities. One would be a list of all classes grouped by the layer (might be hard to read). The other would show the layers for one class.

[umulmrum]

Why not both? :-)

You're right, the list of classes by layer can be huge, but output can still be redirected to a file and inspected there. This way we can see if a layer contains the correct files or is even empty. Checking this for each class separately would be really cumbersome.

[smoench]

Both are possible ;-)

For now you can try the junit output formatter. There are all dependencies be written. With a plug-in for your ci you might get a nicely overview.

[smoench]

@umulmrum I prototyped a possible solution in #527. WDYT?
In the build artifacts you will find a phar-file.