--- a/mercurial/registrar.py Tue Dec 29 23:58:30 2015 +0900
+++ b/mercurial/registrar.py Tue Dec 29 23:58:30 2015 +0900
@@ -94,3 +94,35 @@
"""Execute exra action for registered function, if needed
"""
pass
+
+class delayregistrar(object):
+ """Decorator to delay actual registration until uisetup or so
+
+ For example, the decorator class to delay registration by
+ 'keyword' funcregistrar can be defined as below::
+
+ class extkeyword(delayregistrar):
+ registrar = keyword
+ """
+ def __init__(self):
+ self._list = []
+
+ registrar = None
+
+ def __call__(self, *args, **kwargs):
+ """Return the decorator to delay actual registration until setup
+ """
+ assert self.registrar is not None
+ def decorator(func):
+ # invocation of self.registrar() here can detect argument
+ # mismatching immediately
+ self._list.append((func, self.registrar(*args, **kwargs)))
+ return func
+ return decorator
+
+ def setup(self):
+ """Execute actual registration
+ """
+ while self._list:
+ func, decorator = self._list.pop(0)
+ decorator(func)