# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1434852957 25200
# Node ID a1567766c83c62ba32b11221e7c7b0ecdf58dd6b
# Parent  e7b865f8f3352556478df14b4bc37e0756894f8d
internal: Allow re-registering performance timers.

diff -r e7b865f8f335 -r a1567766c83c piecrust/environment.py
--- a/piecrust/environment.py	Fri Jun 12 17:09:19 2015 -0700
+++ b/piecrust/environment.py	Sat Jun 20 19:15:57 2015 -0700
@@ -137,7 +137,10 @@
         self.base_asset_url_format = '%uri%'
         self._onSubCacheDirChanged(app)
 
-    def registerTimer(self, category):
+    def registerTimer(self, category, *, raise_if_registered=True):
+        if raise_if_registered and category in self._timers:
+            raise Exception("Timer '%s' has already been registered." %
+                            category)
         self._timers[category] = 0
 
     @contextlib.contextmanager