Ignore code marked as such by the preprocessor / Swift Active Compilation Conditions

Many projects use swift preprocessor directives / active compilation conditions to enable conditional compilation. (e.g. lines surrounded by an if/ifdef/ifndef directive that should only compile when their condition – usually an environment variable – evaluates to true.)

As far as I can tell, Sourcery appears not to be aware of these markers and therefore blocks of code marked to be ignored are still processed by Sourcery – leading to compilation errors.

Searching the source code I see that the Source Kitten dependency may expose those lines of code which should be ignored so this may be something that could be added relatively simply?