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Viewing changes to bzrlib/upgrade.py

  • Committer: Martin Pool
  • Date: 2010-09-03 09:14:12 UTC
  • mto: This revision was merged to the branch mainline in revision 5417.
  • Revision ID: mbp@sourcefrog.net-20100903091412-1a40klgfg8c6k3xj
Split out user interaction developer guide to a separate file

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bzrlib/upgrade.py
 
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# Copyright (C) 2005, 2006, 2008, 2009, 2010 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""bzr upgrade logic."""
 
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from bzrlib.bzrdir import BzrDir, format_registry
 
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import bzrlib.errors as errors
 
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from bzrlib.remote import RemoteBzrDir
 
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import bzrlib.ui as ui
 
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class Convert(object):
 
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    def __init__(self, url, format=None):
 
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        self.format = format
 
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        self.bzrdir = BzrDir.open_unsupported(url)
 
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        # XXX: Change to cleanup
 
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        warning_id = 'cross_format_fetch'
 
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        saved_warning = warning_id in ui.ui_factory.suppressed_warnings
 
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        if isinstance(self.bzrdir, RemoteBzrDir):
 
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            self.bzrdir._ensure_real()
 
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            self.bzrdir = self.bzrdir._real_bzrdir
 
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        if self.bzrdir.root_transport.is_readonly():
 
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            raise errors.UpgradeReadonly
 
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        self.transport = self.bzrdir.root_transport
 
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        ui.ui_factory.suppressed_warnings.add(warning_id)
 
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        try:
 
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            self.convert()
 
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        finally:
 
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            if not saved_warning:
 
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                ui.ui_factory.suppressed_warnings.remove(warning_id)
 
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    def convert(self):
 
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        try:
 
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            branch = self.bzrdir.open_branch()
 
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            if branch.user_url != self.bzrdir.user_url:
 
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                ui.ui_factory.note("This is a checkout. The branch (%s) needs to be "
 
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                             "upgraded separately." %
 
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                             branch.user_url)
 
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            del branch
 
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        except (errors.NotBranchError, errors.IncompatibleRepositories):
 
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            # might not be a format we can open without upgrading; see e.g.
 
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            # https://bugs.launchpad.net/bzr/+bug/253891
 
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            pass
 
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        if self.format is None:
 
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            try:
 
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                rich_root = self.bzrdir.find_repository()._format.rich_root_data
 
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            except errors.NoRepositoryPresent:
 
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                rich_root = False # assume no rich roots
 
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            if rich_root:
 
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                format_name = "default-rich-root"
 
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            else:
 
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                format_name = "default"
 
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            format = format_registry.make_bzrdir(format_name)
 
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        else:
 
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            format = self.format
 
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        if not self.bzrdir.needs_format_conversion(format):
 
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            raise errors.UpToDateFormat(self.bzrdir._format)
 
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        if not self.bzrdir.can_convert_format():
 
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            raise errors.BzrError("cannot upgrade from bzrdir format %s" %
 
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                           self.bzrdir._format)
 
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        self.bzrdir.check_conversion_target(format)
 
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        ui.ui_factory.note('starting upgrade of %s' % self.transport.base)
 
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        self.bzrdir.backup_bzrdir()
 
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        while self.bzrdir.needs_format_conversion(format):
 
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            converter = self.bzrdir._format.get_converter(format)
 
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            self.bzrdir = converter.convert(self.bzrdir, None)
 
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        ui.ui_factory.note("finished")
 
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def upgrade(url, format=None):
 
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    """Upgrade to format, or the default bzrdir format if not supplied."""
 
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    Convert(url, format)