Move setting up of staticdirector to init submodule

This duplicates some exceptions, which will be fixed very
soon.

mediagoblin/init/__init__.py

@@ -15,6 +15,11 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import jinja2
+from mediagoblin import staticdirect
+
+
+class Error(Exception): pass
+class ImproperlyConfigured(Error): pass
 
 
 def get_jinja_loader(user_template_path=None):
@@ -31,3 +36,19 @@ def get_jinja_loader(user_template_path=None):
              jinja2.PackageLoader('mediagoblin', 'templates')])
     else:
         return jinja2.PackageLoader('mediagoblin', 'templates')
+
+
+def get_staticdirector(app_config):
+    if app_config.has_key('direct_remote_path'):
+        return staticdirect.RemoteStaticDirect(
+            app_config['direct_remote_path'].strip())
+    elif app_config.has_key('direct_remote_paths'):
+        direct_remote_path_lines = app_config[
+            'direct_remote_paths'].strip().splitlines()
+        return staticdirect.MultiRemoteStaticDirect(
+            dict([line.strip().split(' ', 1)
+                  for line in direct_remote_path_lines]))
+    else:
+        raise ImproperlyConfigured(
+            "One of direct_remote_path or "
+            "direct_remote_paths must be provided")