# 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] != b'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(b"%s call to %s\n" % (label, orig), config=b'dirstate')

        ui.develwarn(b"inconsistency in nonnormalset\n", config=b'dirstate')

        ui.develwarn(b"[nonnormalset] %s\n" % _nonnormalset, config=b'dirstate')

        ui.develwarn(b"[map] %s\n" % nonnormalcomputedmap, config=b'dirstate')

def _checkdirstate(orig, self, arg):

    """Check nonnormal set consistency before and after the call to orig"""

    checkconsistency(self._ui, orig, self._map, self._map.nonnormalset,

                     b"before")

    r = orig(self, arg)

    checkconsistency(self._ui, orig, self._map, self._map.nonnormalset,

                     b"after")

    return r

def extsetup(ui):

    """Wrap functions modifying dirstate to check nonnormalset consistency"""

    dirstatecl = dirstate.dirstate

    devel = ui.configbool(b'devel', b'all-warnings')

    paranoid = ui.configbool(b'experimental', b'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)