start tracking files in our database

migrations/052_site_files_composite_keys.rb

@@ -0,0 +1,30 @@
+Sequel.migration do
+  up {
+    DB.drop_table :site_files
+
+    DB.create_table! :site_files do
+      Integer  :site_id
+      String   :path
+      Bigint   :size
+      String   :sha1_hash
+      Boolean  :is_directory, default: false
+      DateTime :created_at
+      DateTime :updated_at
+      primary_key [:site_id, :path], :name => :site_files_pk
+    end
+  }
+
+  down {
+    DB.drop_table :site_files
+
+    DB.create_table! :site_files do
+      Integer  :site_id, index: true
+      String   :path
+      Bigint   :size
+      String   :sha1_hash
+      Boolean  :is_directory, default: false
+      DateTime :created_at
+      DateTime :updated_at
+    end
+  }
+end