chgserver: add utilities to calculate confighash
confighash is the hash of sensitive config items like [extensions], and
sensitive environment variables like HG*, LD_*, etc. The config items
can come from global, user, repo config, and command line flags.
For chgserver, it is designed that once confighash changes, the server is
not qualified to serve its client and should redirect the client to a new
server. The server does not need to exit in this case, since it can still
be valid (have a matched confighash) to serve other chg clients.
# dirstatenonnormalcheck.py - extension to check the consistency of the
# dirstate's non-normal map
#
# For most operations on dirstate, this extensions checks that the nonnormalset
# contains the right entries.
# It compares the nonnormal file to a nonnormalset built from the map of all
# the files in the dirstate to check that they contain the same files.
from __future__ import absolute_import
from mercurial import (
dirstate,
extensions,
)
def nonnormalentries(dmap):
"""Compute nonnormal entries from dirstate's dmap"""
res = set()
for f, e in dmap.iteritems():
if e[0] != 'n' or e[3] == -1:
res.add(f)
return res
def checkconsistency(ui, orig, dmap, _nonnormalset, label):
"""Compute nonnormalset from dmap, check that it matches _nonnormalset"""
nonnormalcomputedmap = nonnormalentries(dmap)
if _nonnormalset != nonnormalcomputedmap:
ui.develwarn("%s call to %s\n" % (label, orig))
ui.develwarn("inconsistency in nonnormalset\n")
ui.develwarn("[nonnormalset] %s\n" % _nonnormalset)
ui.develwarn("[map] %s\n" % nonnormalcomputedmap)
def _checkdirstate(orig, self, arg):
"""Check nonnormal set consistency before and after the call to orig"""
checkconsistency(self._ui, orig, self._map, self._nonnormalset, "before")
r = orig(self, arg)
checkconsistency(self._ui, orig, self._map, self._nonnormalset, "after")
return r
def extsetup(ui):
"""Wrap functions modifying dirstate to check nonnormalset consistency"""
dirstatecl = dirstate.dirstate
devel = ui.configbool('devel', 'all-warnings')
paranoid = ui.configbool('experimental', 'nonnormalparanoidcheck')
if devel:
extensions.wrapfunction(dirstatecl, '_writedirstate', _checkdirstate)
if paranoid:
# We don't do all these checks when paranoid is disable as it would
# make the extension run very slowly on large repos
extensions.wrapfunction(dirstatecl, 'normallookup', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'otherparent', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'normal', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'write', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'add', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'remove', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'merge', _checkdirstate)
extensions.wrapfunction(dirstatecl, 'drop', _checkdirstate)