Actually pass custom module name to SourceKitten

CHANGELOG.md

@@ -1,3 +1,21 @@
+## Master
+
+##### Breaking
+
+* None.
+
+##### Enhancements
+
+* None.
+
+##### Bug Fixes
+
+* Fixed an issue that prevented building projects with different schema & module
+  names.  
+  [JP Simard](https://github.com/jpsim)
+  [#259](https://github.com/realm/jazzy/issues/259)
+
+
 ## 0.3.1
 
 ##### Breaking

lib/jazzy/doc_builder.rb

@@ -51,8 +51,8 @@ def self.build(options)
         if podspec = options.podspec
           stdout = PodspecDocumenter.new(podspec).sourcekitten_output
         else
-          stdout = Dir.chdir(Config.instance.source_directory) do
-            arguments = ['doc'] + options.xcodebuild_arguments
+          stdout = Dir.chdir(options.source_directory) do
+            arguments = SourceKitten.arguments_from_options(options)
             SourceKitten.run_sourcekitten(arguments)
           end
         end

lib/jazzy/sourcekitten.rb

@@ -108,6 +108,16 @@ def self.subdir_for_doc(doc, parents)
       end
     end
 
+    # Builds SourceKitten arguments based on Jazzy options
+    def self.arguments_from_options(options)
+      arguments = ['doc']
+      unless options.module_name.empty?
+        arguments += ['--module-name', options.module_name]
+      end
+      arguments += options.xcodebuild_arguments
+      arguments
+    end
+
     # Run sourcekitten with given arguments and return STDOUT
     def self.run_sourcekitten(arguments)
       xcode = XCInvoke::Xcode.find_swift_version(Config.instance.swift_version)