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# Copyright (C) 2005 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
import bzrlib.errors
from bzrlib.trace import mutter, note
from bzrlib.branch import Branch
from bzrlib.progress import ProgressBar
import sys
import os
def has_revision(branch, revision_id):
try:
branch.get_revision_xml(revision_id)
return True
except bzrlib.errors.NoSuchRevision:
return False
def greedy_fetch(to_branch, from_branch, revision=None, pb=None):
"""Copy a revision and all available ancestors from one branch to another
If no revision is specified, uses the last revision in the source branch's
revision history.
"""
from_history = from_branch.revision_history()
required_revisions = set(from_history)
all_failed = set()
if revision is not None:
required_revisions.add(revision)
try:
rev_index = from_history.index(revision)
except ValueError:
rev_index = None
if rev_index is not None:
from_history = from_history[:rev_index + 1]
else:
from_history = [revision]
to_history = to_branch.revision_history()
missing = []
for rev_id in from_history:
if not has_revision(to_branch, rev_id):
missing.append(rev_id)
count = 0
while len(missing) > 0:
installed, failed = to_branch.install_revisions(from_branch,
revision_ids=missing,
pb=pb)
count += installed
required_failed = failed.intersection(required_revisions)
if len(required_failed) > 0:
raise bzrlib.errors.InstallFailed(required_failed)
for rev_id in failed:
note("Failed to install %s" % rev_id)
all_failed.update(failed)
new_missing = set()
for rev_id in missing:
try:
revision = from_branch.get_revision(rev_id)
except bzrlib.errors.NoSuchRevision:
if revision in from_history:
raise
else:
continue
for parent in [p.revision_id for p in revision.parents]:
if not has_revision(to_branch, parent):
new_missing.add(parent)
missing = new_missing
return count, all_failed
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