~bzr-pqm/bzr/bzr.dev

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
# Copyright (C) 2005, 2006 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Display what revisions are missing in 'other' from 'this' and vice versa."""

from bzrlib import (
    log,
    )
import bzrlib.revision as _mod_revision


def iter_log_revisions(revisions, revision_source, verbose):
    last_tree = revision_source.revision_tree(_mod_revision.NULL_REVISION)
    last_rev_id = None
    for rev in revisions:
        # We need the following for backward compatibilty (hopefully
        # this will be deprecated soon :-/) -- vila 080911
        if len(rev) == 2:
            revno, rev_id = rev
            merge_depth = 0
        else:
            revno, rev_id, merge_depth = rev
        rev = revision_source.get_revision(rev_id)
        if verbose:
            delta = revision_source.get_revision_delta(rev_id)
        else:
            delta = None
        yield log.LogRevision(rev, revno, merge_depth, delta=delta)


def find_unmerged(local_branch, remote_branch, restrict='all',
                  include_merges=False, backward=False,
                  local_revid_range=None, remote_revid_range=None):
    """Find revisions from each side that have not been merged.

    :param local_branch: Compare the history of local_branch
    :param remote_branch: versus the history of remote_branch, and determine
        mainline revisions which have not been merged.
    :param restrict: ('all', 'local', 'remote') If 'all', we will return the
        unique revisions from both sides. If 'local', we will return None
        for the remote revisions, similarly if 'remote' we will return None for
        the local revisions.
    :param include_merges: Show mainline revisions only if False,
        all revisions otherwise.
    :param backward: Show oldest versions first when True, newest versions
        first when False.
    :param local_revid_range: Revision-id range for filtering local_branch
        revisions (lower bound, upper bound)
    :param remote_revid_range: Revision-id range for filtering remote_branch
        revisions (lower bound, upper bound)

    :return: A list of [(revno, revision_id)] for the mainline revisions on
        each side.
    """
    local_branch.lock_read()
    try:
        remote_branch.lock_read()
        try:
            return _find_unmerged(
                local_branch, remote_branch, restrict=restrict,
                include_merges=include_merges, backward=backward,
                local_revid_range=local_revid_range,
                remote_revid_range=remote_revid_range)
        finally:
            remote_branch.unlock()
    finally:
        local_branch.unlock()


def _enumerate_mainline(ancestry, graph, tip_revno, tip, backward=True):
    """Enumerate the mainline revisions for these revisions.

    :param ancestry: A set of revisions that we care about
    :param graph: A Graph which lets us find the parents for a revision
    :param tip_revno: The revision number for the tip revision
    :param tip: The tip of mainline
    :param backward: Show oldest versions first when True, newest versions
        first when False.
    :return: [(revno, revision_id)] for all revisions in ancestry that
        are left-hand parents from tip, or None if ancestry is None.
    """
    if ancestry is None:
        return None
    if not ancestry: #Empty ancestry, no need to do any work
        return []

    # Optionally, we could make 1 call to graph.get_parent_map with all
    # ancestors. However that will often check many more parents than we
    # actually need, and the Graph is likely to already have the parents cached
    # anyway.
    mainline = []
    cur = tip
    cur_revno = tip_revno
    while cur in ancestry:
        parent_map = graph.get_parent_map([cur])
        parents = parent_map.get(cur)
        if not parents:
            break # Ghost, we are done
        mainline.append((str(cur_revno), cur))
        cur = parents[0]
        cur_revno -= 1
    if not backward:
        mainline.reverse()
    return mainline


def _enumerate_with_merges(branch, ancestry, graph, tip_revno, tip,
                           backward=True):
    """Enumerate the revisions for the ancestry.

    :param branch: The branch we care about
    :param ancestry: A set of revisions that we care about
    :param graph: A Graph which lets us find the parents for a revision
    :param tip_revno: The revision number for the tip revision
    :param tip: The tip of the ancsetry
    :param backward: Show oldest versions first when True, newest versions
        first when False.
    :return: [(revno, revision_id)] for all revisions in ancestry that
        are parents from tip, or None if ancestry is None.
    """
    if ancestry is None:
        return None
    if not ancestry: #Empty ancestry, no need to do any work
        return []

    merge_sorted_revisions = branch.iter_merge_sorted_revisions()
    # Now that we got the correct revnos, keep only the relevant
    # revisions.
    merge_sorted_revisions = [
        # log.reverse_by_depth expects seq_num to be present, but it is
        # stripped by iter_merge_sorted_revisions()
        (0, revid, n, d, e) for revid, n, d, e in merge_sorted_revisions
        if revid in ancestry]
    if not backward:
        merge_sorted_revisions = log.reverse_by_depth(merge_sorted_revisions)
    revline = []
    for seq, rev_id, merge_depth, revno, end_of_merge in merge_sorted_revisions:
        revline.append(('.'.join(map(str, revno)), rev_id, merge_depth))
    return revline


def _filter_revs(graph, revs, revid_range):
    if revid_range is None or revs is None:
        return revs
    return [rev for rev in revs
        if graph.is_between(rev[1], revid_range[0], revid_range[1])]


def _find_unmerged(local_branch, remote_branch, restrict,
                   include_merges, backward,
                   local_revid_range=None, remote_revid_range=None):
    """See find_unmerged.

    The branches should already be locked before entering.
    """
    local_revno, local_revision_id = local_branch.last_revision_info()
    remote_revno, remote_revision_id = remote_branch.last_revision_info()
    if local_revno == remote_revno and local_revision_id == remote_revision_id:
        # A simple shortcut when the tips are at the same point
        return [], []
    graph = local_branch.repository.get_graph(remote_branch.repository)
    if restrict == 'remote':
        local_extra = None
        remote_extra = graph.find_unique_ancestors(remote_revision_id,
                                                   [local_revision_id])
    elif restrict == 'local':
        remote_extra = None
        local_extra = graph.find_unique_ancestors(local_revision_id,
                                                  [remote_revision_id])
    else:
        if restrict != 'all':
            raise ValueError('param restrict not one of "all", "local",'
                             ' "remote": %r' % (restrict,))
        local_extra, remote_extra = graph.find_difference(local_revision_id,
                                                          remote_revision_id)
    if include_merges:
        locals = _enumerate_with_merges(local_branch, local_extra,
                                        graph, local_revno,
                                        local_revision_id, backward)
        remotes = _enumerate_with_merges(remote_branch, remote_extra,
                                         graph, remote_revno,
                                         remote_revision_id, backward)
    else:
        # Now that we have unique ancestors, compute just the mainline, and
        # generate revnos for them.
        locals = _enumerate_mainline(local_extra, graph, local_revno,
                                     local_revision_id, backward)
        remotes = _enumerate_mainline(remote_extra, graph, remote_revno,
                                      remote_revision_id, backward)
    return _filter_revs(graph, locals, local_revid_range), _filter_revs(graph,
        remotes, remote_revid_range)


def sorted_revisions(revisions, history_map):
    revisions = [(history_map[r],r) for r in revisions]
    revisions.sort()
    return revisions