Dependency injection in Go via wrapping the function

wrapper.go

package main

import "log"

type printerFunc func(message string, args ...interface{})

func helloWrapper(p printerFunc) func(string, ...interface{}) {
	return func(message string, arguments ...interface{}) {
		p(message, arguments...)
	}
}

func main() {
	hello := helloWrapper(log.Printf)
	hello("hello %s", "world")
}

Fantastic!