Really simplistic version support.

lib/grape-swagger.rb

@@ -81,7 +81,7 @@ def self.setup(options)
               routes_array = routes.map do |route|
                 notes = route.route_notes && @@markdown ? Kramdown::Document.new(route.route_notes.strip_heredoc).to_html : route.route_notes
                 {
-                  :path => parse_path(route.route_path),
+                  :path => parse_path(route.route_path, api_version),
                   :operations => [{
                     :notes => notes,
                     :summary => route.route_description || '',
@@ -122,11 +122,13 @@ def parse_params(params, path, method)
               end
             end
 
-            def parse_path(path)
+            def parse_path(path, version)
               # adapt format to swagger format
               parsed_path = path.gsub('(.:format)', '.{format}')
-              # adapt params to swagger format
-              parsed_path.gsub(/:([a-z]+)/, '{\1}')
+              parsed_path = parsed_path.gsub(/:([a-z]+)/, '{\1}')
+              # add the version
+              parsed_path = parsed_path.gsub('{version}', version) if version
+              parsed_path
             end
           end
         end

spec/non_default_api_spec.rb

@@ -120,5 +120,32 @@ def app; SimpleApiWithMarkdown end
       last_response.body.should == "{:apiVersion=>\"0.1\", :swaggerVersion=>\"1.1\", :basePath=>\"http://example.org\", :resourcePath=>\"\", :apis=>[{:path=>\"/something.{format}\", :operations=>[{:notes=>\"<p><em>test</em></p>\\n\", :summary=>\"this gets something\", :nickname=>\"GET-something---format-\", :httpMethod=>\"GET\", :parameters=>[]}]}]}"
     end
   end
+
+  context "versioned API" do
+    before(:all) do
+      class VersionedMountedApi < Grape::API
+        prefix 'api'
+        version 'v1'
+
+        desc 'this gets something'
+        get '/something' do
+          {:bla => 'something'}
+        end
+      end
+
+      class SimpleApiWithVersion < Grape::API
+        mount VersionedMountedApi
+        add_swagger_documentation :api_version => "v1"
+      end
+    end
+
+    def app; SimpleApiWithVersion end
+
+    it "parses version and places it in the path" do
+      get '/swagger_doc/api'
+      last_response.body.should == "{:apiVersion=>\"v1\", :swaggerVersion=>\"1.1\", :basePath=>\"http://example.org\", :resourcePath=>\"\", :apis=>[{:path=>\"/api/v1/something.{format}\", :operations=>[{:notes=>nil, :summary=>\"this gets something\", :nickname=>\"GET-api--version-something---format-\", :httpMethod=>\"GET\", :parameters=>[]}]}]}"
+    end
+  end
+
 
 end