making the gae_css.dir property more generic so it can be use to pres…

…erve prefixes for any build type.

build/build.xml

@@ -506,9 +506,9 @@
 
         <checksum file="${dir.intermediate}/${dir.js}/scripts-concat.min.js" algorithm="sha" property="scripts.sha" />
         <if>
-            <isset property="gae.js_dir" />
+            <isset property="js.prefix" />
             <then>
-                <property name="scripts.js" value="${gae.js_dir}/${scripts.sha}.js" />
+                <property name="scripts.js" value="${js.prefix}/${scripts.sha}.js" />
             </then>
             <else>
                 <property name="scripts.js" value="${dir.js}/${scripts.sha}.js" />
@@ -821,9 +821,9 @@
 
         <checksum file="${dir.intermediate}/${dir.css}/style-concat.min.css" algorithm="sha" property="css.sha" />
         <if>
-            <isset property="gae.css_dir" />
+            <isset property="css.prefix" />
             <then>
-                <property name="style.css" value="${gae.css_dir}/${css.sha}.css" />
+                <property name="style.css" value="${css.prefix}/${css.sha}.css" />
             </then>
             <else>
                 <property name="style.css" value="${dir.css}/${css.sha}.css" />

build/config/project.properties

@@ -70,12 +70,16 @@ env               =
 # dir.css
 # dir.images
 
-# Google App Engine Directory Structure
+# Optional: Maintain custom prefix on concatenated files.
 #
-# Prevent "static/" being included in concated file paths.
+# PHP:
+# css.prefix = <?php echo base_url(); ?>css
+# js.prefix = <?php echo base_url(); ?>js
 #
-# gae.css_dir = /css
-# gae.js_dir = /js
+# App Engine:
+# css.prefix = /css
+# js.prefix = /js
+
 
 # Override default JSHint Options (see http://jshint.com/ for description of options)
 #tool.jshint.opts =