comparison mercurial/dirstate.py @ 29189:930d4ee4647e

dirstate: add prefix and suffix arguments to backup

This would allow the code explicitly copying dirstate to use this method instead.
Use of this method will increase encapsulation (the dirstate class will be sole
owner of its on-disk storage).

29188:f00f1de16454

        if tr:
            return self._pendingfilename
        else:
            return self._filename

    def savebackup(self, tr, suffix):
        '''Save current dirstate into backup file with suffix'''
        filename = self._actualfilename(tr)

        # use '_writedirstate' instead of 'write' to write changes certainly,
        # because the latter omits writing out if transaction is running.

            # ensure that pending file written above is unlinked at
            # failure, even if tr.writepending isn't invoked until the
            # end of this transaction
            tr.registertmp(filename, location='plain')

        self._opener.write(filename + suffix, self._opener.tryread(filename))

    def restorebackup(self, tr, suffix):
        '''Restore dirstate by backup file with suffix'''
        # this "invalidate()" prevents "wlock.release()" from writing
        # changes of dirstate out after restoring from backup file
        self.invalidate()
        filename = self._actualfilename(tr)
        self._opener.rename(filename + suffix, filename)

    def clearbackup(self, tr, suffix):
        '''Clear backup file with suffix'''
        filename = self._actualfilename(tr)
        self._opener.unlink(filename + suffix)

29189:930d4ee4647e

        if tr:
            return self._pendingfilename
        else:
            return self._filename

    def savebackup(self, tr, suffix='', prefix=''):
        '''Save current dirstate into backup file with suffix'''
        filename = self._actualfilename(tr)

        # use '_writedirstate' instead of 'write' to write changes certainly,
        # because the latter omits writing out if transaction is running.

            # ensure that pending file written above is unlinked at
            # failure, even if tr.writepending isn't invoked until the
            # end of this transaction
            tr.registertmp(filename, location='plain')

        self._opener.write(prefix + filename + suffix,
                           self._opener.tryread(filename))

    def restorebackup(self, tr, suffix='', prefix=''):
        '''Restore dirstate by backup file with suffix'''
        # this "invalidate()" prevents "wlock.release()" from writing
        # changes of dirstate out after restoring from backup file
        self.invalidate()
        filename = self._actualfilename(tr)
        self._opener.rename(prefix + filename + suffix, filename)

    def clearbackup(self, tr, suffix='', prefix=''):
        '''Clear backup file with suffix'''
        filename = self._actualfilename(tr)
        self._opener.unlink(prefix + filename + suffix)