narrowspec: move module into core
Having support for parsing the narrow specification in core is
necessary for moving many other parts of narrow to core.
We do still want to harmonize the narrow spec with the sparse
spec. And the format needs to be documented. But this shouldn't
hold up the code moving to core.
Differential Revision: https://phab.mercurial-scm.org/D2201
# narrowdirstate.py - extensions to mercurial dirstate to support narrow clones
#
# Copyright 2017 Google, Inc.
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.
from __future__ import absolute_import
from mercurial.i18n import _
from mercurial import (
dirstate,
error,
extensions,
match as matchmod,
narrowspec,
util as hgutil,
)
def setup(repo):
"""Add narrow spec dirstate ignore, block changes outside narrow spec."""
def walk(orig, self, match, subrepos, unknown, ignored, full=True,
narrowonly=True):
if narrowonly:
narrowmatch = repo.narrowmatch()
match = matchmod.intersectmatchers(match, narrowmatch)
return orig(self, match, subrepos, unknown, ignored, full)
extensions.wrapfunction(dirstate.dirstate, 'walk', walk)
# Prevent adding files that are outside the sparse checkout
editfuncs = ['normal', 'add', 'normallookup', 'copy', 'remove', 'merge']
for func in editfuncs:
def _wrapper(orig, self, *args):
dirstate = repo.dirstate
narrowmatch = repo.narrowmatch()
for f in args:
if f is not None and not narrowmatch(f) and f not in dirstate:
raise error.Abort(_("cannot track '%s' - it is outside " +
"the narrow clone") % f)
return orig(self, *args)
extensions.wrapfunction(dirstate.dirstate, func, _wrapper)
def filterrebuild(orig, self, parent, allfiles, changedfiles=None):
if changedfiles is None:
# Rebuilding entire dirstate, let's filter allfiles to match the
# narrowspec.
allfiles = [f for f in allfiles if repo.narrowmatch()(f)]
orig(self, parent, allfiles, changedfiles)
extensions.wrapfunction(dirstate.dirstate, 'rebuild', filterrebuild)
def _narrowbackupname(backupname):
assert 'dirstate' in backupname
return backupname.replace('dirstate', narrowspec.FILENAME)
def restorebackup(orig, self, tr, backupname):
self._opener.rename(_narrowbackupname(backupname), narrowspec.FILENAME,
checkambig=True)
orig(self, tr, backupname)
extensions.wrapfunction(dirstate.dirstate, 'restorebackup', restorebackup)
def savebackup(orig, self, tr, backupname):
orig(self, tr, backupname)
narrowbackupname = _narrowbackupname(backupname)
self._opener.tryunlink(narrowbackupname)
hgutil.copyfile(self._opener.join(narrowspec.FILENAME),
self._opener.join(narrowbackupname), hardlink=True)
extensions.wrapfunction(dirstate.dirstate, 'savebackup', savebackup)
def clearbackup(orig, self, tr, backupname):
orig(self, tr, backupname)
self._opener.unlink(_narrowbackupname(backupname))
extensions.wrapfunction(dirstate.dirstate, 'clearbackup', clearbackup)