attr_* are automatically not marked as tasks.

lib/thor/base.rb

@@ -97,6 +97,18 @@ def register_klass_file(klass) #:nodoc:
     module ClassMethods
       attr_accessor :debugging
 
+      def attr_reader(*) #:nodoc:
+        no_tasks { super }
+      end
+
+      def attr_writer(*) #:nodoc:
+        no_tasks { super }
+      end
+
+      def attr_accessor(*) #:nodoc:
+        no_tasks { super }
+      end
+
       # Adds an argument to the class and creates an attr_accessor for it.
       #
       # Arguments are different from options in several aspects. The first one

spec/base_spec.rb

@@ -233,4 +233,19 @@ def hello
       }.must raise_error(Thor::UndefinedTaskError, /the 'what' task of MyScript is private/)
     end
   end
+
+  describe "attr_*" do
+    it "should not add attr_reader as a task" do
+      capture(:stderr){ MyScript.start(["another_attribute"]) }.must =~ /could not find/
+    end
+
+    it "should not add attr_writer as a task" do
+      capture(:stderr){ MyScript.start(["another_attribute=", "foo"]) }.must =~ /could not find/
+    end
+
+    it "should not add attr_accessor as a task" do
+      capture(:stderr){ MyScript.start(["some_attribute"]) }.must =~ /could not find/
+      capture(:stderr){ MyScript.start(["some_attribute=", "foo"]) }.must =~ /could not find/
+    end
+  end
 end

spec/fixtures/script.thor

@@ -1,4 +1,8 @@
 class MyScript < Thor
+  attr_accessor :some_attribute
+  attr_writer :another_attribute
+  attr_reader :another_attribute
+
   group :script
   default_task :example_default_task