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(.module:
  [lux #*
   [abstract
    ["." monad (#+ do)]]
   [control
    ["." try (#+ Try)]
    [security
     ["!" capability]]
    [concurrency
     ["." promise (#+ Promise)]]]
   [world
    ["." file (#+ Path File Directory)]]]
  ["." /// #_
   [command (#+ Command)]
   ["#" profile]
   ["#." action (#+ Action)]])

(def: (clean-files! root)
  (-> (Directory Promise) (Promise (Try Any)))
  (do {! ///action.monad}
    [nodes (: (Promise (Try (List (File Promise))))
              (!.use (\ root files) []))
     _ (monad.map ! (function (_ node)
                      (!.use (\ node delete) []))
                  nodes)]
    (wrap [])))

(def: #export (do! fs profile)
  (-> (file.System Promise) (Command Any))
  (case (get@ #///.target profile)
    (#.Some target)
    (do {! ///action.monad}
      [target (: (Promise (Try (Directory Promise)))
                 (!.use (\ fs directory) target))
       _ (loop [root target]
           (do !
             [_ (..clean-files! root)
              subs (: (Promise (Try (List (Directory Promise))))
                      (!.use (\ root directories) []))
              _ (monad.map ! recur subs)]
             (!.use (\ root discard) [])))]
      (exec (log! "No 'target' defined for clean-up.")
        (wrap [])))
    
    #.None
    (exec (log! "No 'target' defined for clean-up.")
      (\ ///action.monad wrap []))))