~bzr-pqm/bzr/bzr.dev

"""\

A plugin for displaying what revisions are in 'other' but not in local.

"""

def show_missing(br_local, br_remote, verbose=False, quiet=False):

    """Show the revisions which exist in br_remote, that 

    do not exist in br_local.

    """

    from bzrlib.log import show_one_log

    import sys

    local_history = br_local.revision_history()

    remote_history = br_remote.revision_history()

    if local_history == remote_history:

        if not quiet:

            print 'Trees are identical.'

        return 0

    if local_history[:len(remote_history)] == remote_history:

        # Local is not missing anything from remote, so consider it

        # up-to-date

        if not quiet:

            print 'Local tree has all of remote revisions (remote is missing local)'

        return 0

    if quiet:

        return 1

    # Check for divergence

    common_idx = min(len(local_history), len(remote_history)) - 1

    if common_idx >= 0 and local_history[common_idx] != remote_history[common_idx]:

        print 'Trees have diverged'

    local_rev_set = set(local_history)

    # Find the last common revision between the two trees

    revno = 0

    for revno, (local_rev, remote_rev) in enumerate(zip(local_history, remote_history)):

        if local_rev != remote_rev:

            break

    missing_remote = []

    for rno, rev_id in enumerate(remote_history[revno:]):

        # This assumes that you can have a revision in the

        # local history, which does not have the same ancestry

        # as the remote ancestry.

        # This may or may not be possible.

        # In the future this should also checked for merged revisions.

        if rev_id not in local_rev_set:

            missing_remote.append((rno+revno+1, rev_id))

    print 'Missing %d revisions' %  len(missing_remote)

    print

    if verbose:

        from bzrlib.diff import compare_trees

        from bzrlib.tree import EmptyTree

        show_ids = True

        last_tree = EmptyTree

        last_rev_id = None

    else:

        show_ids = False

    for revno, rev_id in missing_remote:

        rev = br_remote.get_revision(rev_id)

        if verbose:

            parent_rev_id = rev.parents[0].revision_id

            if last_rev_id == parent_rev_id:

                parent_tree = last_tree

            else:

                parent_tree = br_remote.revision_tree(parent_rev_id)

            revision_tree = br_remote.revision_tree(rev_id)

            last_rev_id = rev_id

            last_tree = revision_tree

            delta = compare_trees(revision_tree, parent_tree)

        else:

            delta = None

        show_one_log(revno, rev, delta, verbose, sys.stdout, 'original')

    return 1