/brz/remove-bazaar

# Copyright (C) 2008 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""UI helper for the push command."""

from bzrlib import (builtins, branch, bzrdir, errors, revision as _mod_revision,

                    transport)

from bzrlib.trace import note, warning

def _show_push_branch(br_from, revision_id, location, to_file, verbose=False,

    overwrite=False, remember=False, stacked_on=None, create_prefix=False,

    use_existing_dir=False):

    """Push a branch to a location.

    :param br_from: the source branch

    :param revision_id: the revision-id to push up to

    :param location: the url of the destination

    :param to_file: the output stream

    :param verbose: if True, display more output than normal

    :param overwrite: if False, a current branch at the destination may not

        have diverged from the source, otherwise the push fails

    :param remember: if True, store the location as the push location for

        the source branch

    :param stacked_on: the url of the branch, if any, to stack on;

        if set, only the revisions not in that branch are pushed

    :param create_prefix: if True, create the necessary parent directories

        at the destination if they don't already exist

    :param use_existing_dir: if True, proceed even if the destination

        directory exists without a current .bzr directory in it

    """

    to_transport = transport.get_transport(location)

    br_to = repository_to = dir_to = None

    try:

        dir_to = bzrdir.BzrDir.open_from_transport(to_transport)

    except errors.NotBranchError:

        pass # Didn't find anything

    if dir_to is None:

        # The destination doesn't exist; create it.

        # XXX: Refactor the create_prefix/no_create_prefix code into a

        #      common helper function

        def make_directory(transport):

            transport.mkdir('.')

            return transport

        def redirected(transport, e, redirection_notice):

            note(redirection_notice)

            return transport._redirected_to(e.source, e.target)

        try:

            to_transport = transport.do_catching_redirections(

                make_directory, to_transport, redirected)

        except errors.FileExists:

            if not use_existing_dir:

                raise errors.BzrCommandError("Target directory %s"

                     " already exists, but does not have a valid .bzr"

                     " directory. Supply --use-existing-dir to push"

                     " there anyway." % location)

        except errors.NoSuchFile:

            if not create_prefix:

                raise errors.BzrCommandError("Parent directory of %s"

                    " does not exist."

                    "\nYou may supply --create-prefix to create all"

                    " leading parent directories."

                    % location)

            builtins._create_prefix(to_transport)

        except errors.TooManyRedirections:

            raise errors.BzrCommandError("Too many redirections trying "

                                         "to make %s." % location)

        # Now the target directory exists, but doesn't have a .bzr

        # directory. So we need to create it, along with any work to create

        # all of the dependent branches, etc.

        dir_to = br_from.bzrdir.clone_on_transport(to_transport,

            revision_id=revision_id, stacked_on=stacked_on)

        br_to = dir_to.open_branch()

        push_result = branch.PushResult()

        push_result.old_revno = None

        push_result.old_revid = None

        push_result.source_branch = br_from

        push_result.target_branch = br_to

        # TODO: Some more useful message about what was copied

        try:

            push_result.stacked_on = br_to.get_stacked_on_url()

        except (errors.UnstackableBranchFormat,

                errors.UnstackableRepositoryFormat,

                errors.NotStacked):

            push_result.stacked_on = None

        (push_result.new_revno, push_result.new_revid) = \

            br_to.last_revision_info()

        if br_from.get_push_location() is None or remember:

            br_from.set_push_location(br_from.base)

    else:

        if stacked_on is not None:

            warning("Ignoring request for a stacked branch as repository "

                    "already exists at the destination location.")

        inter = branch.InterBranchBzrDir.get(br_from, dir_to)

        try:

            push_result = inter.push(revision_id=revision_id, 

                overwrite=overwrite, remember=remember)

        except errors.NoRepositoryPresent:

            # we have a bzrdir but no branch or repository

            # XXX: Figure out what to do other than complain.

            raise errors.BzrCommandError("At %s you have a valid .bzr control"

                " directory, but not a branch or repository. This is an"

                " unsupported configuration. Please move the target directory"

                " out of the way and try again."

                % location)

        except errors.DivergedBranches:

            raise errors.BzrCommandError('These branches have diverged.'

                                    '  Try using "merge" and then "push".')

        if not push_result.workingtree_updated:

            warning("This transport does not update the working " 

                    "tree of: %s. See 'bzr help working-trees' for "

                    "more information." % push_result.target_branch.base)

    push_result.report(to_file)

    old_revid = push_result.old_revid

    old_revno = push_result.old_revno

    br_to = push_result.target_branch

    if verbose:

        br_to.lock_read()

        try:

            from bzrlib.log import show_branch_change

            show_branch_change(br_to, to_file, old_revno, old_revid)

        finally:

            br_to.unlock()