Invoke get options task before annotating migrations

[ fixes #252 ]

lib/annotate.rb

@@ -29,7 +29,7 @@ module Annotate
     :timestamp, :exclude_serializers, :classified_sort, :show_foreign_keys,
   ]
   OTHER_OPTIONS=[
-    :ignore_columns
+    :ignore_columns, :skip_on_db_migrate
   ]
   PATH_OPTIONS=[
     :require, :model_dir

lib/tasks/migrate.rake

@@ -2,20 +2,21 @@
 # (They are not used to build annotate itself.)
 
 # Append annotations to Rake tasks for ActiveRecord, so annotate automatically gets
-# run after doing db:migrate. 
-# Unfortunately it relies on ENV for options; it'd be nice to be able to set options
-# in a per-project config file so this task can read them.
+# run after doing db:migrate.
+
 namespace :db do
   task :migrate do
+    Rake::Task['set_annotation_options'].invoke
     Annotate::Migration.update_annotations
   end
 
   namespace :migrate do
     [:change, :up, :down, :reset, :redo].each do |t|
       task t do
-        Annotate::Migration.update_annotations 
+        Rake::Task['set_annotation_options'].invoke
+        Annotate::Migration.update_annotations
       end
-    end 
+    end
   end
 end
 
@@ -24,9 +25,9 @@ module Annotate
     @@working = false
 
     def self.update_annotations
-      unless @@working || (ENV['skip_on_db_migrate'] =~ /(true|t|yes|y|1)$/i)
+      unless @@working || Annotate.skip_on_migration?
         @@working = true
-        Rake::Task['annotate_models'].invoke 
+        Rake::Task['annotate_models'].invoke
       end
     end
   end