[Extensions] Make it possible for extensions to create empty directories. Closes GH-173.

doc-src/content/tutorials/extensions.markdown

@@ -165,13 +165,14 @@ You may also see some real manifest files here:
 
 ### Manifest Declarations
 
-There are five kinds of manifest declarations:
+There are six kinds of manifest declarations:
 
 1. `stylesheet` - Declares a sass file.
 2. `image` - Declares an image.
 3. `javascript` - Declares a javascript file.
 4. `html` - Declares an html file.
 5. `file` - Declares a random file.
+6. `directory` - Declares a directory should be created.
 
 All declarations take the path to the file as their first argument. Note that the
 normal slash `/` can and should be used in a manifest. Compass will take care of
@@ -196,6 +197,15 @@ Stylesheet options:
 * `:condition` - this is used to hint the user that a conditional comment should be
   used to import the stylesheet with the given condition.
 
+Directory options:
+
+* `:within` - where the directory should be created. If omitted, the directory
+  will be relative to the project directory. Can be one of: the following
+  * `sass_dir`
+  * `javascripts_dir`
+  * `fonts_dir`
+  * `images_dir`
+
 HTML files:
 
 You can provide html as haml or as plain html. If you provide haml, the haml will be

lib/compass/installers/base.rb

@@ -116,6 +116,19 @@ module Compass
         "#{pattern_name_as_dir}#{to}"
       end
 
+      def install_directory(from, to, options)
+        d = if within = options[:within]
+          if respond_to?(within)
+            targetize("#{send(within)}/#{to}")
+          else
+            raise Compass::Error, "Unrecognized location: #{within}"
+          end
+        else
+          targetize(to)
+        end
+        directory d
+      end
+
       alias install_html_without_haml install_html
       def install_html(from, to, options)
         if to =~ /\.haml$/

lib/compass/installers/manifest.rb

@@ -40,6 +40,7 @@ module Compass
       type :font
       type :file
       type :html
+      type :directory
 
       def help(value = nil)
         if value

lib/compass/installers/manifest_installer.rb

@@ -17,9 +17,11 @@ module Compass
       # Initializes the project to work with compass
       def init
         dirs = manifest.map do |entry|
-          loc = send("install_location_for_#{entry.type}", entry.to, entry.options)
-          File.dirname(loc)
-        end
+          unless entry.type == :directory
+            loc = send("install_location_for_#{entry.type}", entry.to, entry.options)
+            File.dirname(loc)
+          end
+        end.compact
 
         if manifest.has_stylesheet?
           dirs << sass_dir