Add external rules file option

README.rdoc

@@ -31,6 +31,15 @@ can get away with rack-rewrite instead of writing Apache mod_rewrite rules.
     r301 %r{/wiki/(\w+)_\w+}, '/$1'
   end
 
+=== Specify an external rules file AND additional rules in the block
+
+  config.middleware.insert_before(Rack::Lock, Rack::Rewrite, :rules => 'config/rules.rb') do
+    rewrite '/wiki/John_Trupiano', '/john'
+    r301 '/wiki/Yair_Flicker', '/yair'
+    r302 '/wiki/Greg_Jastrab', '/greg'
+    r301 %r{/wiki/(\w+)_\w+}, '/$1'
+  end
+
 == Use Cases
 
 === Rebuild of existing site in a new technology

TODO

@@ -1,6 +1,5 @@
 * OUTSTANDING
   * Add :host support to restrict which URL's a rewrite rule matches [10/15/09]
-  * Add support for specifying a config file instead of passing a block (e.g. config/rewrite.rb) [10/15/09]
   * Provide testing helpers (e.g. should_rewrite) to facilitate straightforward testing. [10/25/09]
   * Allow rules to return arbitrary html (e.g. the contents of the maintenance page) [10/25/09]
 

lib/rack/rewrite.rb

@@ -5,10 +5,15 @@ module Rack
   # A rack middleware for defining and applying rewrite rules. In many cases you 
   # can get away with rack-rewrite instead of writing Apache mod_rewrite rules.  
   class Rewrite
-    def initialize(app, &rule_block)
+    def initialize(app, options = {}, &rule_block)
       @app = app
       @rule_set = RuleSet.new
       @rule_set.instance_eval(&rule_block) if block_given?
+
+      rules_file = ::File.expand_path(options[:rules])
+      if ::File.exists?(rules_file)
+        @rule_set.instance_eval(::File.read(rules_file))
+      end
     end
 
     def call(env)