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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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error,
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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 wrapdirstate(repo, dirstate):
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"""Add narrow spec dirstate ignore, block changes outside narrow spec."""
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def _editfunc(fn):
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def _wrapper(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 fn(self, *args)
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return _wrapper
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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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class narrowdirstate(dirstate.__class__):
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def walk(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
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# can 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 super(narrowdirstate, self).walk(match, subrepos, unknown,
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ignored, full)
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# Prevent adding/editing/copying/deleting files that are outside the
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# sparse checkout
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@_editfunc
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def normal(self, *args):
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return super(narrowdirstate, self).normal(*args)
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@_editfunc
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def add(self, *args):
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return super(narrowdirstate, self).add(*args)
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@_editfunc
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def normallookup(self, *args):
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return super(narrowdirstate, self).normallookup(*args)
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@_editfunc
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def copy(self, *args):
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return super(narrowdirstate, self).copy(*args)
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@_editfunc
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def remove(self, *args):
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return super(narrowdirstate, self).remove(*args)
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@_editfunc
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def merge(self, *args):
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return super(narrowdirstate, self).merge(*args)
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def rebuild(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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super(narrowdirstate, self).rebuild(parent, allfiles, changedfiles)
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def restorebackup(self, tr, backupname):
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self._opener.rename(_narrowbackupname(backupname),
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narrowspec.FILENAME, checkambig=True)
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super(narrowdirstate, self).restorebackup(tr, backupname)
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def savebackup(self, tr, backupname):
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super(narrowdirstate, self).savebackup(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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def clearbackup(self, tr, backupname):
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super(narrowdirstate, self).clearbackup(tr, backupname)
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self._opener.unlink(_narrowbackupname(backupname))
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dirstate.__class__ = narrowdirstate
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return dirstate
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