templater: remember cache key of evaluated revset
This provides a hint for caching further computation result of the given
revset. See the next patch for example.
# A dummy extension that installs an hgweb command that throws an Exception.
from __future__ import absolute_import
from mercurial.hgweb import webcommands
def raiseerror(web):
'''Dummy web command that raises an uncaught Exception.'''
# Simulate an error after partial response.
if b'partialresponse' in web.req.qsparams:
web.res.status = b'200 Script output follows'
web.res.headers[b'Content-Type'] = b'text/plain'
web.res.setbodywillwrite()
list(web.res.sendresponse())
web.res.getbodyfile().write(b'partial content\n')
raise AttributeError('I am an uncaught error!')
def extsetup(ui):
setattr(webcommands, 'raiseerror', raiseerror)
webcommands.__all__.append(b'raiseerror')