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# narrowdirstate.py - extensions to mercurial dirstate to support narrow clones
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#
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# Copyright 2017 Google, Inc.
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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from __future__ import absolute_import
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from mercurial.i18n import _
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from mercurial import (
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dirstate,
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error,
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extensions,
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match as matchmod,
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narrowspec,
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util as hgutil,
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)
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def setup(repo):
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"""Add narrow spec dirstate ignore, block changes outside narrow spec."""
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def walk(orig, self, match, subrepos, unknown, ignored, full=True,
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narrowonly=True):
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if narrowonly:
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# hack to not exclude explicitly-specified paths so that they can
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# be warned later on e.g. dirstate.add()
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em = matchmod.exact(match._root, match._cwd, match.files())
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nm = matchmod.unionmatcher([repo.narrowmatch(), em])
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match = matchmod.intersectmatchers(match, nm)
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return orig(self, match, subrepos, unknown, ignored, full)
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extensions.wrapfunction(dirstate.dirstate, 'walk', walk)
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# Prevent adding files that are outside the sparse checkout
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editfuncs = ['normal', 'add', 'normallookup', 'copy', 'remove', 'merge']
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for func in editfuncs:
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def _wrapper(orig, self, *args):
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dirstate = repo.dirstate
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narrowmatch = repo.narrowmatch()
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for f in args:
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if f is not None and not narrowmatch(f) and f not in dirstate:
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raise error.Abort(_("cannot track '%s' - it is outside " +
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"the narrow clone") % f)
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return orig(self, *args)
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extensions.wrapfunction(dirstate.dirstate, func, _wrapper)
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def filterrebuild(orig, self, parent, allfiles, changedfiles=None):
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if changedfiles is None:
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# Rebuilding entire dirstate, let's filter allfiles to match the
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# narrowspec.
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allfiles = [f for f in allfiles if repo.narrowmatch()(f)]
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orig(self, parent, allfiles, changedfiles)
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extensions.wrapfunction(dirstate.dirstate, 'rebuild', filterrebuild)
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def _narrowbackupname(backupname):
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assert 'dirstate' in backupname
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return backupname.replace('dirstate', narrowspec.FILENAME)
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def restorebackup(orig, self, tr, backupname):
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self._opener.rename(_narrowbackupname(backupname), narrowspec.FILENAME,
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checkambig=True)
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orig(self, tr, backupname)
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extensions.wrapfunction(dirstate.dirstate, 'restorebackup', restorebackup)
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def savebackup(orig, self, tr, backupname):
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orig(self, tr, backupname)
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narrowbackupname = _narrowbackupname(backupname)
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self._opener.tryunlink(narrowbackupname)
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hgutil.copyfile(self._opener.join(narrowspec.FILENAME),
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self._opener.join(narrowbackupname), hardlink=True)
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extensions.wrapfunction(dirstate.dirstate, 'savebackup', savebackup)
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def clearbackup(orig, self, tr, backupname):
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orig(self, tr, backupname)
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self._opener.unlink(_narrowbackupname(backupname))
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extensions.wrapfunction(dirstate.dirstate, 'clearbackup', clearbackup)
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