I must be missing something but I'm trying to use the Leptonica C library in Go using a C wrapper that was made for that purpose:
https://github.com/GeertJohan/go.leptonica/blob/master/leptonica.go
But I don't understand... it allows me to import files but then how do I actually invoke the Leptonica functions? (Specifically I want to detect the deskew of the image using Leptonica.)
I don't see any function in the Go wrapper that allows me to send a command like this. How do I talk to it?
go.leptonica
simply hasn't implemented that. You'll have to call the C functions yourself.
Use leptonica.go
as a starting point, and write your own wrapper.