~abentley/bzrtools/bzrtools.dev

# Copyright (C) 2004 Aaron Bentley

# <aaron.bentley@utoronto.ca>

#

#    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 pybaz

from pybaz.backends.baz import sequence_cmd

import re

__docformat__ = "restructuredtext"

__doc__ = "Utility functions to be used by commands"

def direct_merges(merges):

    """Get a list of direct merges, from a list of direct and indirect

    :param merges: Iterator of merge patchlogs

    :type merges: iter of `pybaz.Patchlog`

    :return: The direct merges

    :rtype: list of `pybaz.Patchlog`

    """

    indirect = []

    direct = []

    logs = list(merges)

    if not logs:

        return []

    for log in logs:

        try:

            this_indirect = [f for f in log.new_patches if f != log.revision]

        except pybaz.errors.NamespaceError:

            print

            print "log ", log, " unusable, attempting to use archive copy."

            log = pybaz.Revision(str(log.revision)).patchlog

            this_indirect = [f for f in log.new_patches if f != log.revision]

        indirect.extend(this_indirect)

        if log.continuation_of is not None:

            # continuations list everything in new_patches

            continue

        try:

            # ask baz if we can

            ancestor = log.revision.ancestor

        except pybaz.errors.ExecProblem:

            # baz does not know

            # guess

            if log.revision.patchlevel != 'version-0': 

                ancestor = namespace_previous(log.revision)

            else:

                found = False

                ancestor = None

                # ancestor might be in the tree

                for tree_log in pybaz.WorkingTree(log.tree).iter_logs(

                    log.revision.version, reverse=True):

                    if found:

                        ancestor = tree_log.revision

                        break

                    if tree_log.revision == log.revision:

                        found = True

                print "ancestor of %s is %s" % (log.revision, ancestor)

        if ancestor is not None:

            indirect.append(ancestor)

    return [log for log in logs if not log.revision in indirect]

def namespace_previous(revision):

    if revision.patchlevel == 'base-0':

        return None

    if revision.patchlevel == 'patch-1':

        return revision.version['base-0']

    if revision.patchlevel.startswith('patch'):

        level = int(revision.patchlevel[len('patch-'):]) -1

        return revision.version['patch-%d' % level]

    if revision.patchlevel == 'version-0':

        raise RuntimeError("cannot determine prior namespace level for a "

                           "version-0 patch ('%s')" % revision)

    if revision.patchlevel == 'versionfix-1':

        return revision.version['version-0']

    if revision.patchlevel.startswith('versionfix'):

        level = int(revision.patchlevel[len('versionfix-'):]) -1

        return revision.version['versionfix-%d' % level]

    raise NotImplementedError

def iter_new_merges(tree, version, reverse=False):

    """List patchlogs that are new in this tree since the last commit.

    :param tree: The working tree to calculate new revisions in

    :type tree: str

    :param version: The version to use when determining new logs

    :type version: str

    :param reverse: If true, list backwards, from newest to oldest

    :type reverse: bool

    :return: An iterator for new revision logs in this tree

    :rtype: Iterator of `pybaz.Patchlog`

    """

    assert (isinstance(version, pybaz.Version))

    for line in _iter_new_merges(tree, version.fullname, reverse):

        yield pybaz.Patchlog(line, tree)

def _iter_new_merges(directory, version, reverse):

    """List patchlogs that are new in this tree since the last commit.

    :param directory: The working tree to calculate new revisions in

    :type directory: str

    :param version: The version to use when determining new logs

    :type version: str

    :param reverse: If true, list backwards, from newest to oldest

    :type reverse: bool

    :return: An iterator for names of revisions new in this tree

    :rtype: Iterator of str

    """

    args = [ 'new-merges', '--dir', directory ]

    if reverse: 

        args.append('--reverse')

    args.append(version)

    return sequence_cmd(args)