Add debugging flag

[Revolucent]

Add a launch flag along the lines of -com.apple.CoreData.SQLDebug, but instead of printing out the SQL (for which you can already use the aforementioned tag), this will print out any generated predicates, and possibly other useful information.

-com.prosumma.CoreDataQueryInterface.Debug, perhaps?

[Revolucent]

Closed in d2a2a66

[patgoley]

@Revolucent Just looked over this for fun. One thing to note, and this probably doesn't matter, but print only logs to the debug console while NSLog also prints to the device console. I can't think of a reason that someone would ship a production build with the logging enabled but if they did, they wouldn't be able to read it from the device console or at all. Just wanted to make sure we intentionally opted for that limitation.

I am one for splitting hairs obviously :) I just feel like if you opt for the logging flag you should get the full service. But probably no one cares.

[Revolucent]

I am one for splitting hairs obviously.

Me, too. I think we just tend to split different hairs. But in this case, I think I will switch to NSLog. When Swift was released, people simply stopped using NSLog. All of the examples used print (well println). I simply assumed it was Swift's NSLog and left it at that. I never even noticed that it didn't print the date. The truth is I never thought too deeply about it, so good to know the distinction.

What I'm surprised didn't leap out at you was this brain dead code:

NSProcossInfo().arguments.filter{ $0 == "-com.prosumma.CoreDataQueryInterface.Debug" }.count > 0

It should have been:

NSProcessInfo().arguments.contains("-com.prosumma.CoreDataQueryInterface.Debug")

I'll make the changes.