Add task to create a graph of rake dependencies.

.gitignore

@@ -41,8 +41,8 @@ shotgun/lib/subtend/*.d
 \#*
 .\#*
 *.dSYM
+/rubinius_tasks.dot
 
-/vm/.deps
 /vm/log
 
 attic/externals/syd-parser/pkg

rakelib/graph.rake

@@ -0,0 +1,19 @@
+task :graph, :exclude do |_, args|
+  begin
+    require 'graph'
+  rescue LoadError
+    abort 'install ZenHacks'
+  end
+
+  exclude = /#{args[:exclude]}/ if args[:exclude]
+
+  graph = Graph.new
+
+  Rake::Task.tasks.each do |task|
+    next if exclude and task.name =~ exclude
+    graph[task.name] = task.prerequisites
+  end
+
+  open 'rubinius_tasks.dot', 'w' do |io| io << graph end
+end
+