← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/fetch.py

  • Committer: mbp at sourcefrog
  • Date: 2005-03-30 22:27:17 UTC
  • Revision ID: mbp@sourcefrog.net-20050330222717-027b5837127b938d
experiment with new nested inventory file format
not used by default yet

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/fetch.py
1
 
# Copyright (C) 2005 by Canonical Ltd
2
 
 
3
 
# This program is free software; you can redistribute it and/or modify
4
 
# it under the terms of the GNU General Public License as published by
5
 
# the Free Software Foundation; either version 2 of the License, or
6
 
# (at your option) any later version.
7
 
 
8
 
# This program is distributed in the hope that it will be useful,
9
 
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
 
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11
 
# GNU General Public License for more details.
12
 
 
13
 
# You should have received a copy of the GNU General Public License
14
 
# along with this program; if not, write to the Free Software
15
 
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
16
 
import bzrlib.errors
17
 
from bzrlib.trace import mutter, note
18
 
from bzrlib.branch import Branch
19
 
from bzrlib.progress import ProgressBar
20
 
import sys
21
 
import os
22
 
 
23
 
def has_revision(branch, revision_id):
24
 
    try:
25
 
        branch.get_revision_xml(revision_id)
26
 
        return True
27
 
    except bzrlib.errors.NoSuchRevision:
28
 
        return False
29
 
 
30
 
 
31
 
def greedy_fetch(to_branch, from_branch, revision=None, pb=None):
32
 
    """Copy a revision and all available ancestors from one branch to another
33
 
    If no revision is specified, uses the last revision in the source branch's
34
 
    revision history.
35
 
    """
36
 
    from_history = from_branch.revision_history()
37
 
    required_revisions = set(from_history)
38
 
    all_failed = set()
39
 
    if revision is not None:
40
 
        required_revisions.add(revision)
41
 
        try:
42
 
            rev_index = from_history.index(revision)
43
 
        except ValueError:
44
 
            rev_index = None
45
 
        if rev_index is not None:
46
 
            from_history = from_history[:rev_index + 1]
47
 
        else:
48
 
            from_history = [revision]
49
 
    to_history = to_branch.revision_history()
50
 
    missing = []
51
 
    for rev_id in from_history:
52
 
        if not has_revision(to_branch, rev_id):
53
 
            missing.append(rev_id)
54
 
    
55
 
    count = 0
56
 
    while len(missing) > 0:
57
 
        installed, failed = to_branch.install_revisions(from_branch, 
58
 
                                                        revision_ids=missing,
59
 
                                                        pb=pb)
60
 
        count += installed
61
 
        required_failed = failed.intersection(required_revisions)
62
 
        if len(required_failed) > 0:
63
 
            raise bzrlib.errors.InstallFailed(required_failed)
64
 
        for rev_id in failed:
65
 
            note("Failed to install %s" % rev_id)
66
 
        all_failed.update(failed)
67
 
        new_missing = set() 
68
 
        for rev_id in missing:
69
 
            try:
70
 
                revision = from_branch.get_revision(rev_id)
71
 
            except bzrlib.errors.NoSuchRevision:
72
 
                if revision in from_history:
73
 
                    raise
74
 
                else:
75
 
                    continue
76
 
            for parent in [p.revision_id for p in revision.parents]:
77
 
                if not has_revision(to_branch, parent):
78
 
                    new_missing.add(parent)
79
 
        missing = new_missing
80
 
    return count, all_failed
81
 
 
82