project can find sub-urls

extensions/tree/tree.coffee

@@ -7,8 +7,6 @@ fs = require 'fs'
 
 module.exports =
 class Tree extends Extension
-  ignorePattern: /^(\.git|\.xcodeproj|\.DS_Store)$/
-
   project: null
 
   constructor: ->
@@ -25,8 +23,8 @@ class Tree extends Extension
     super
 
   urls: (root=@project.url) ->
-    _.compact _.map (fs.list root), (url) =>
-      return if @ignorePattern.test url
+    _.map (@project.urls root), (url) =>
       type: if fs.isDirectory url then 'dir' else 'file'
       label: url.replace(root, "").substring 1
       url: url
+

src/atom/project.coffee

@@ -14,6 +14,8 @@ module.exports =
 class Project extends Resource
   window.resourceTypes.push this
 
+  ignorePattern: /(\.git|\.xcodeproj|\.DS_Store)$/
+
   html:
     $ '<div></div>'
 
@@ -71,3 +73,6 @@ class Project extends Resource
     parent = @url.replace /([^\/])$/, "$1/"
     child = url.replace /([^\/])$/, "$1/"
     child.match "^" + parent
+
+  urls: (root=@url) ->
+    _.reject (fs.list root), (url) => @ignorePattern.test url