~bzr-pqm/bzr/bzr.dev

# 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, bzrdir, errors, 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

    else:

        # If we can open a branch, use its direct repository, otherwise see

        # if there is a repository without a branch.

        try:

            br_to = dir_to.open_branch()

        except errors.NotBranchError:

            # Didn't find a branch, can we find a repository?

            try:

                repository_to = dir_to.find_repository()

            except errors.NoRepositoryPresent:

                pass

        else:

            # Found a branch, so we must have found a repository

            repository_to = br_to.repository

    push_result = None

    if verbose:

        old_rh = []

    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(redirected_transport, e, redirection_notice):

            return transport.get_transport(e.get_target_url())

        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()

        # TODO: Some more useful message about what was copied

        try:

            finally_stacked_on = br_to.get_stacked_on_url()

        except (errors.UnstackableBranchFormat,

                errors.UnstackableRepositoryFormat,

                errors.NotStacked):

            finally_stacked_on = None

        if finally_stacked_on is not None:

            note('Created new stacked branch referring to %s.' %

                 finally_stacked_on)

        else:

            note('Created new branch.')

        # We successfully created the target, remember it

        if br_from.get_push_location() is None or remember:

            br_from.set_push_location(br_to.base)

    elif repository_to is None:

        # 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)

    elif br_to is None:

        # We have a repository but no branch, copy the revisions, and then

        # create a branch.

        if stacked_on is not None:

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

                    "already exists at the destination location.")

        repository_to.fetch(br_from.repository, revision_id=revision_id)

        br_to = br_from.clone(dir_to, revision_id=revision_id)

        note('Created new branch.')

        if br_from.get_push_location() is None or remember:

            br_from.set_push_location(br_to.base)

    else: # We have a valid to branch

        if stacked_on is not None:

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

                    "already exists at the destination location.")

        # We were able to connect to the remote location, so remember it.

        # (We don't need to successfully push because of possible divergence.)

        if br_from.get_push_location() is None or remember:

            br_from.set_push_location(br_to.base)

        if verbose:

            old_rh = br_to.revision_history()

        try:

            try:

                tree_to = dir_to.open_workingtree()

            except errors.NotLocalUrl:

                warning("This transport does not update the working " 

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

                        "more information." % br_to.base)

                push_result = br_from.push(br_to, overwrite,

                                           stop_revision=revision_id)

            except errors.NoWorkingTree:

                push_result = br_from.push(br_to, overwrite,

                                           stop_revision=revision_id)

            else:

                tree_to.lock_write()

                try:

                    push_result = br_from.push(tree_to.branch, overwrite,

                                               stop_revision=revision_id)

                    tree_to.update()

                finally:

                    tree_to.unlock()

        except errors.DivergedBranches:

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

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

    if push_result is not None:

        push_result.report(to_file)

    elif verbose:

        new_rh = br_to.revision_history()

        if old_rh != new_rh:

            # Something changed

            from bzrlib.log import show_changed_revisions

            show_changed_revisions(br_to, old_rh, new_rh,

                                   to_file=to_file)

    else:

        # we probably did a clone rather than a push, so a message was

        # emitted above

        pass