Namespacing based on relative file path

lib/barista.rb

@@ -57,7 +57,7 @@ def invoke_hook(name, *args)
 
     # Configuration - Tweak how you use Barista.
 
-    has_boolean_options    :verbose, :bare, :add_filter, :add_preamble, :exception_on_error, :embedded_interpreter, :auto_compile
+    has_boolean_options    :verbose, :bare, :add_filter, :add_preamble, :exception_on_error, :embedded_interpreter, :auto_compile, :add_namespaces
     has_delegate_methods   Compiler, :bin_path, :bin_path=, :js_path, :js_path=
     has_delegate_methods   Framework, :register
     has_deprecated_methods :compiler, :compiler=, :compiler_klass, :compiler_klass=
@@ -174,6 +174,10 @@ def default_for_embedded_interpreter
     def default_for_auto_compile
       true
     end
+
+    def default_for_add_namespaces
+      false
+    end
 
 
     # Actual tasks on the barista module.

lib/barista/compiler.rb

@@ -117,6 +117,7 @@ def initialize(context, options = {})
     def compile!
       location          = @options.fetch(:origin, 'inline')
       @compiled_content = compile(@context, location)
+      add_namespace(location) if location != 'inline' && Barista.add_namespaces?
       @compiled_content = preamble(location) + @compiled_content if location != 'inline' && Barista.add_preamble?
       @compiled         = true
     end
@@ -167,6 +168,33 @@ def preamble(location)
       inner_message = copyable?(location) ? "copied" : "compiled"
       "/* DO NOT MODIFY. This file was #{inner_message} #{Time.now.httpdate} from\n * #{location.strip}\n */\n\n"
     end
+
+    def add_namespace(input_path)
+      path_info = parse_path(input_path)
+      if path_info[:directories].count > 0
+        controller = path_info[:directories].join('_')
+        @compiled_content.gsub("\n", "\n  ") # Corrent indentation
+        if path_info[:filename_without_extension] == path_info[:directories].last
+          function_name = 'init'
+        else
+          function_name = path_info[:filename_without_extension]
+        end
+        @compiled_content = "if(typeof #{controller} === 'undefined') var #{controller} = {}\n#{controller}.#{function_name} = function() {\n  #{@compiled_content}\n  }"
+      end
+    end
+
+    def parse_path(input_path)
+      relative_path = input_path.gsub(Barista.root.to_s, '')
+      filename = relative_path.slice!(/(\w+\.\w+)+\z/)
+      filename_without_extension = filename.slice(/^\w+/)
+      directories = relative_path.split('/').delete_if(&:empty?)
+      {
+        :relative_path              => relative_path, 
+        :filename                   => filename, 
+        :filename_without_extension => filename_without_extension,
+        :directories                => directories
+      }
+    end
 
     def compilation_error_for(location, message)
       details = "Compilation of '#{location}' failed:\n#{message}"
@@ -189,6 +217,6 @@ def setup_compiler_context(context)
         @options[:origin] ||= 'inline'
       end
     end
-
+    
   end
 end

lib/barista/helpers.rb

@@ -41,6 +41,13 @@ def coffeescript_tag(code, html_options = {})
       end
     end
 
+    def coffeescript_namespace_init_tag(controller = params[:controller], action = params[:action])
+      output = defined?(ActiveSupport::SafeBuffer) ? ActiveSupport::SafeBuffer.new : ""
+      output << "#{controller.gsub('/', '_')}.init();\n"
+      output << "#{controller.gsub('/', '_')}.#{action}();"
+      javascript_tag output
+    end
+
     protected
 
     def normalise_coffeescript_path(path)

lib/generators/barista/install/templates/initializer.rb

@@ -58,5 +58,9 @@
   # Make helpers and the HAML filter output coffee-script instead of the compiled JS.
   # Used in combination with the coffeescript_interpreter_js helper in Rails.
   # c.embedded_interpreter = true
+
+  # Wrap compiled JS in namespacing functions. Call these with the coffeescript_namespace_init_tag helper
+  # When used in combination with a JS packager allows you to have 1 JS file per site; calling only functions for current controller & action.
+  # c.add_namespacing = true
 
 end