move Dir into fs.coffee and commonjs it

src/editor.coffee

@@ -3,7 +3,7 @@
 $ = require 'jquery'
 _ = require 'underscore'
 
-{Chrome, Process, Dir} = require 'osx'
+{Chrome, Process} = require 'osx'
 File = require 'fs'
 
 ace = require 'ace/ace'
@@ -24,7 +24,7 @@ save = ->
 exports.open = open = (path) ->
   filename = path
 
-  if Dir.isDir filename
+  if File.isDir filename
     Process.cwd filename
     Chrome.title _.last filename.split '/'
     editor.getSession().setValue ""

src/fs.coffee

@@ -12,6 +12,14 @@ module.exports =
     else
       path
 
+  # Returns true if the file specified by path exists and is a
+  # directory.
+  isDirectory: (path) ->
+    isDir = new jscocoa.outArgument
+    exists = OSX.NSFileManager.defaultManager.
+      fileExistsAtPath_isDirectory path, isDir
+    exists and isDir.valueOf()
+
   # Returns true if the file specified by path exists and is a
   # regular file.
   isFile: (path) ->
@@ -20,6 +28,24 @@ module.exports =
       fileExistsAtPath_isDirectory path, isDir
     exists and not isDir.valueOf()
 
+  # Returns an array with all the names of files contained
+  # in the directory path.
+  list: (path, recursive) ->
+    path = File.absolute path
+    fm = OSX.NSFileManager.defaultManager
+    if recursive
+      paths = fm.subpathsAtPath path
+    else
+      paths = fm.contentsOfDirectoryAtPath_error path, null
+    _.map paths, (entry) -> "#{path}/#{entry}"
+
+  # Return an array with all directories below (and including)
+  # the given path, as discovered by depth-first traversal. Entries
+  # are in lexically sorted order within directories. Symbolic links
+  # to directories are not traversed into.
+  listDirectoryTree: (path) ->
+    @list path, true
+
   # Open, read, and close a file, returning the file's contents.
   read: (path) ->
     OSX.NSString.stringWithContentsOfFile(@absolute path).toString()

src/osx.coffee

@@ -87,22 +87,6 @@ Chrome =
   appRoot: ->
     OSX.NSBundle.mainBundle.resourcePath
 
-# Handles the file system
-Dir =
-  list: (path, recursive) ->
-    path = File.absolute path
-    fm = OSX.NSFileManager.defaultManager
-    if recursive
-      paths = fm.subpathsAtPath path
-    else
-      paths = fm.contentsOfDirectoryAtPath_error path, null
-    _.map paths, (entry) -> "#{path}/#{entry}"
-  isDir: (path) ->
-    isDir = new jscocoa.outArgument
-    exists = OSX.NSFileManager.defaultManager.
-      fileExistsAtPath_isDirectory path, isDir
-    exists and isDir.valueOf()
-
 Process =
   cwd: (path) ->
     if path?

src/plugins.coffee

@@ -1,10 +1,10 @@
 $ = require 'jquery'
 _ = require 'underscore'
 
-{Chrome, Dir} = require 'osx'
+{Chrome} = require 'osx'
 File = require 'fs'
 
-_.map Dir.list(Chrome.appRoot() + "/plugins"), (plugin) ->
+_.map File.list(Chrome.appRoot() + "/plugins"), (plugin) ->
   require plugin
 
 if css = File.read "~/.atomicity/twilight.css"
@@ -15,5 +15,5 @@ if css = File.read "~/.atomicity/twilight.css"
   style.appendChild rules
   head.appendChild style
 
-_.map Dir.list("~/.atomicity/"), (path) ->
+_.map File.list("~/.atomicity/"), (path) ->
   require path