+ let ensure_path_exists path =
+ let dir = Filename.dirname path in
+ try
+ let stats = Unix.stat dir in
+ if stats.Unix.st_kind <> Unix.S_DIR then
+ raise (Failure (dir ^ " already exists and is not a directory"))
+ else
+ ()
+ with
+ Unix.Unix_error (_,_,_) ->
+ let pstatus = Unix.system ("mkdir -p " ^ dir) in
+ match pstatus with
+ | Unix.WEXITED n when n = 0 -> ()
+ | _ -> raise (Failure ("Unable to create " ^ dir))
+ in