~bzr-pqm/bzr/bzr.dev

# 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.selftest.testrevision import make_branches

from bzrlib.trace import mutter

from bzrlib.branch import Branch

from bzrlib.progress import ProgressBar

import sys

import os

def greedy_fetch(from_branch, to_branch, last_revision=None):

    from_history = from_branch.revision_history()

    if last_revision is not None:

        from_history = from_history[:from_history.index(last_revision)+1]

    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)

    while len(missing) > 0:

        to_branch.install_revisions(from_branch, revision_ids=missing)

        new_missing = []

        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.append(parent)

        missing = new_missing

from testsweet import InTempDir

def has_revision(branch, revision_id):

    try:

        branch.get_revision_xml(revision_id)

        return True

    except bzrlib.errors.NoSuchRevision:

        return False

class TestFetch(InTempDir):

    def runTest(self):

        def new_branch(name):

            os.mkdir(name)

            return Branch(name, init=True)

        #highest indices a: 3, b: 4

        br_a, br_b = make_branches()

        assert not has_revision(br_b, br_a.revision_history()[3])

        assert has_revision(br_b, br_a.revision_history()[2])

        assert len(br_b.revision_history()) == 5

        greedy_fetch(br_a, br_b, br_a.revision_history()[2])

        # greedy_fetch is not supposed to alter the revision history

        assert len(br_b.revision_history()) == 5

        assert not has_revision(br_b, br_a.revision_history()[3])

        assert len(br_b.revision_history()) == 5

        greedy_fetch(br_a, br_b, br_a.revision_history()[3])

        assert has_revision(br_b, br_a.revision_history()[3])

        assert not has_revision(br_a, br_b.revision_history()[3])

        assert not has_revision(br_a, br_b.revision_history()[4])

        greedy_fetch(br_b, br_a)

        assert has_revision(br_a, br_b.revision_history()[3])

        assert has_revision(br_a, br_b.revision_history()[4])

        br_b2 = new_branch('br_b2')

        greedy_fetch(br_b, br_b2)

        assert has_revision(br_b2, br_b.revision_history()[4])

        assert has_revision(br_b2, br_a.revision_history()[2])

        assert not has_revision(br_b2, br_a.revision_history()[3])

        br_a2 = new_branch('br_a2')

        greedy_fetch(br_a, br_a2)

        assert has_revision(br_a2, br_b.revision_history()[4])

        assert has_revision(br_a2, br_a.revision_history()[3])

if __name__ == '__main__':

    import sys

    sys.exit(run_suite(unittest.makeSuite()))