/b-gtk/fix-viz

# Copyright (C) 2006 by Szilveszter Farkas (Phanatic) <szilveszter.farkas@gmail.com>

# Some parts of the code are:

# Copyright (C) 2005, 2006 by 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

from bzrlib.workingtree import WorkingTree

from bzrlib.errors import NoLocationKnown

def missing(branch, other_branch=None, reverse=False):

    """ Get the number of missing or extra revisions of local branch.

    :param branch: path to local branch

    :param other_branch: location of the other branch

    :param reverse: reverse the order of revisions

    :return: number of missing revisions (if < 0, then extra revisions * -1)

    """

    import bzrlib

    from bzrlib.missing import find_unmerged

    local_branch = bzrlib.branch.Branch.open_containing(branch)[0]

    parent = local_branch.get_parent()

    if other_branch is None:

        other_branch = parent

        if other_branch is None:

            raise NoLocationKnown

    remote_branch = bzrlib.branch.Branch.open(other_branch)

    if remote_branch.base == local_branch.base:

        remote_branch = local_branch

    local_branch.lock_read()

    ret = 0

    try:

        remote_branch.lock_read()

        try:

            local_extra, remote_extra = find_unmerged(local_branch, remote_branch)

            if reverse is False:

                local_extra.reverse()

                remote_extra.reverse()

            if local_extra:

                ret = len(local_extra) * -1

            if remote_extra:

                ret = len(remote_extra)

            if not remote_extra and not local_extra:

                ret = 0

        finally:

            remote_branch.unlock()

    finally:

        local_branch.unlock()

    if not ret and parent is None and other_branch is not None:

        local_branch.lock_write()

        try:

            # handle race conditions - a parent might be set while we run.

            if local_branch.get_parent() is None:

                local_branch.set_parent(remote_branch.base)

        finally:

            local_branch.unlock()

    return ret

def pull(branch, location=None, remember=False, overwrite=False, revision=None):

    """ Pull revisions from another branch.

    :param branch: the local branch where you want to pull

    :param location: location of branch you'd like to pull from (can be a bundle, too)

    :param remeber: if True, the location will be stored

    :param overwrite: if True, forget local changes, and update the branch to match the remote one

    :param revision: if specified, only the given revision will be pulled (revno)

    :return: number of revisions pulled

    """

    nobundle = False

    from bzrlib.branch import Branch

    try:

        from bzrlib.bundle import read_bundle_from_url

        from bzrlib.bundle.apply_bundle import install_bundle

    except ImportError:

        # no bundle support

        nobundle = True

    try:

        tree_to = WorkingTree.open_containing(branch)[0]

        branch_to = tree_to.branch

    except NoWorkingTree:

        tree_to = None

        branch_to = Branch.open_containing(branch)[0]

    reader = None

    if location is not None and not nobundle:

        try:

            reader = read_bundle_from_url(location)

        except NotABundle:

            pass # Continue on considering this url a Branch

    stored_loc = branch_to.get_parent()

    if location is None:

        if stored_loc is None:

            raise NoLocationKnown

        else:

            location = stored_loc

    if reader is not None and not nobundle:

        install_bundle(branch_to.repository, reader)

        branch_from = branch_to

    else:

        branch_from = Branch.open(location)

        if branch_to.get_parent() is None or remember:

            branch_to.set_parent(branch_from.base)

    rev_id = None

    if revision is not None:

        rev_id = branch_from.get_rev_id(revision)

    else:

        if reader is not None:

            rev_id = reader.info.target

    old_rh = branch_to.revision_history()

    if tree_to is not None:

        count = tree_to.pull(branch_from, overwrite, rev_id)

    else:

        count = branch_to.pull(branch_from, overwrite, rev_id)

    return count

def update(location):

    """ Update a tree to have the latest code committed to its branch.

    :param location: the path to the branch/working tree

    :return: None if tree is up to date, 1 if there are conflicts, 0 if updated without having conflicts

    """

    tree = WorkingTree.open_containing(location)[0]

    tree.lock_write()

    try:

        if tree.last_revision() == tree.branch.last_revision():

            # may be up to date, check master too.

            master = tree.branch.get_master_branch()

            if master is None or master.last_revision == tree.last_revision():

                # tree is up to date.

                return None

        conflicts = tree.update()

        if conflicts != 0:

            return 1

        else:

            return 0

    finally:

        tree.unlock()