export wcs_* env. vars to substition vars

wcs/qommon/http_request.py

@@ -61,3 +61,13 @@ class HTTPRequest(quixote.http_request.HTTPRequest):
         for k, v in self.form.items():
             if type(v) is unicode:
                 self.form[k] = v.encode(site_charset)
+
+    def get_substitution_variables(self):
+        # env variables starting with "APPNAME_" are exported to
+        # substitutions variables
+        prefix = get_publisher().APP_NAME.lower() + '_'
+        vars = {}
+        for k, v in self.environ.items():
+            if k.lower().startswith(prefix):
+                vars['env_' + k.lower()] = v
+        return vars

wcs/qommon/publisher.py

@@ -377,6 +377,7 @@ class QommonPublisher(Publisher):
         self.install_lang(request.language)
         self.substitutions.reset()
         self.substitutions.feed(self)
+        self.substitutions.feed(request)
         return Publisher.try_publish(self, request)
 
     def get_site_language(self):