API v3: add captures route dsl method

lib/travis/api/v3/routes.rb

@@ -15,8 +15,8 @@ module Travis::API::V3
     end
 
     resource :repository do
-      route '/repo/({repository.id}|{repository.slug})',
-            capture: { :"repository.id" => :digit }
+      capture id: :digit, slug: %r{[^/]+%2[fF][^/]+}
+      route '/repo/({repository.id}|{repository.slug})'
       get :find
 
       post :enable,  '/enable'
@@ -40,17 +40,20 @@ module Travis::API::V3
     end
 
     resource :build do
+      capture id: :digit
       route '/build/{build.id}'
       get :find
     end
 
     resource :user do
+      capture id: :digit
       route '/user'
       get :current
       get :find, '/{user.id}'
     end
 
     resource :organization do
+      capture id: :digit
       route '/org/{organization.id}'
       get :find
     end

lib/travis/api/v3/routes/dsl.rb

@@ -33,8 +33,23 @@ module Travis::API::V3
       @current_resource = resource_was
     end
 
-    def route(value, options = {})
-      current_resource.route = Mustermann.new(prefix) + Mustermann.new(value, options)
+    def route(value)
+      current_resource.route = mustermann(prefix) + mustermann(value)
+    end
+
+    def mustermann(*input)
+      Mustermann.new(*input, **mustermann_options)
+    end
+
+    def mustermann_options
+      @mustermann_options ||= { capture: {} }
+    end
+
+    def capture(mapping)
+      mapping.each_pair do |key, value|
+        key = "#{current_resource.identifier}.#{key}" if current_resource and not key.to_s.include?(?.)
+        mustermann_options[:capture][key.to_sym] = value
+      end
     end
 
     def get(*args)