Op.MkdirDirectory creation.
val make_op : 
  id:id ->
  mark:mark ->
  mode:int ->
  created:B0_std.Mtime.Span.t ->
  ?post_exec:(op -> unit) ->
  ?k:(op -> unit) ->
  B0_std.Fpath.t ->
  opmake_op declares a directory creation operation, see the corresponding accessors for the semantics of the various arguments.
val make : dir:B0_std.Fpath.t -> mode:int -> tmake constructs a bare mkdir operation.
val dir : t -> B0_std.Fpath.tdir mk is the directory created by mk.
val mode : t -> intmode mk are the permissions of the directory created by mk.