dirstate: set identity whenever we read the dirstate's v2 docket
The docket can be loaded outside of a full read (for exemple when
pre-fetching parents), so the current code would read/set the identity
after loading the data, opening a race condition:
A0: first process docket is read
B0: other process appends new data to the dirstate (and changes the docket)
A1: first process sets the identity (based on pre-B content, but with post-B identity)
A1: first process loads the dirstatemap from the data file
A1: first process does not detect the race and overwrites the update from B.
# A dummy extension that installs an hgweb command that throws an Exception.
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')