~abentley/bzrtools/bzrtools.dev

# Copyright (C) 2005 by Aaron Bentley

# 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.branch import Branch

from bzrlib.fetch import greedy_fetch

from bzrlib.errors import NoSuchRevision, InstallFailed, BzrCommandError

def fetch_ghosts(branch):

    """Install ghosts from copies in another branch."""

    this_branch = Branch.open_containing('.')[0]

    if branch is None:

        branch = this_branch.get_parent()

        if branch is None:

            raise BzrCommandError('No branch specified and no location saved.')

        else:

            print "Using saved location %s" % branch

    other_branch = Branch.open_containing(branch)[0]

    installed = []

    failed = []

    # Because iter_ghosts tests for existence after our last fetch

    # is complete, it won't falsely report an ancestor as a ghost.

    # Yay iterators!

    ghosts = iter_ghosts(this_branch)

    for revision in ghosts:

        try:

            greedy_fetch(this_branch, other_branch, revision)

            installed.append(revision)

        except InstallFailed:

            failed.append(revision)

    if len(installed) > 0:

        print "Installed:"

    for rev in installed:

        print rev

    if len(failed) > 0:

        print "Still missing:"

    for rev in failed:

        print rev

def iter_ghosts(branch):

    """Find all ancestors that aren't stored in this branch."""

    seen = set()

    lines = [branch.last_revision()]

    while len(lines) > 0:

        new_lines = []

        for line in lines:

            if line in seen:

                continue

            seen.add(line)

            try:

                revision = branch.get_revision(line)

                new_lines.extend(revision.parent_ids)

            except NoSuchRevision:

                yield line

        lines = new_lines