Function ckdev_file_name 

pub fn ckdev_file_name(file_name: &str) -> String

The ckdev- name for a built binary’s file name: ck-subc becomes ckdev-subc, ck becomes ckdev-ck, any other name n becomes ckdev-n, and a name that already starts with ckdev- is returned as it is. A trailing .exe stays at the end, so Windows still runs the result.