[PATCH 1 of 2 STABLE] ui: add a variable to control whether hooks should be called

[Idan Kamara]

# HG changeset patch
# User Idan Kamara <idankk86 at gmail.com>
# Date 1340470627 -10800
# Branch stable
# Node ID 26afc4b68fb967ade439d529ac6296faa7cb19c7
# Parent  f8af57c00a29cb52c7561fad1f7ab2d9e68b96cf
ui: add a variable to control whether hooks should be called

So hooks can be temporarily disabled.

diff --git a/mercurial/hook.py b/mercurial/hook.py
--- a/mercurial/hook.py
+++ b/mercurial/hook.py
@@ -138,6 +138,9 @@
     _redirect = state
 
 def hook(ui, repo, name, throw=False, **args):
+    if not ui.callhooks:
+        return False
+
     r = False
 
     oldstdout = -1
diff --git a/mercurial/ui.py b/mercurial/ui.py
--- a/mercurial/ui.py
+++ b/mercurial/ui.py
@@ -19,6 +19,7 @@
         self._ucfg = config.config() # untrusted
         self._trustusers = set()
         self._trustgroups = set()
+        self.callhooks = True
 
         if src:
             self.fout = src.fout
@@ -31,6 +32,7 @@
             self._trustusers = src._trustusers.copy()
             self._trustgroups = src._trustgroups.copy()
             self.environ = src.environ
+            self.callhooks = src.callhooks
             self.fixconfig()
         else:
             self.fout = sys.stdout