Use rebar in emacs?

Question

There is a defun in .emacs to get erlang project path, how can I execute a shell-command to do the following:

cd *~/erlang-project-folder*
make
         


        

Answer 1

Instead of relying on directory structure, it's better to try to locate the rebar.config file that is in the root of your project. This could be achieved with following code:

(defun my-find-rebar-root ()
  (let ((dir (locate-dominating-file default-directory "rebar.config")))
    (or dir default-directory)))

and after that you can use this function for compilation:

(defun my-inferior-erlang-compile ()
  (interactive)
  (let ((default-directory (my-find-rebar-root)))
    (compile "make")))

Although, I'm not sure that the make is right command here - maybe it's better to use rebar compile instead?

P.S. I hope, that I'll find some free time, and will finish rebar support in EDE - in this case, it will be the same unified interface for work with projects.