/brz/remove-bazaar

To get this branch, use:
bzr branch http://gegoxaren.bato24.eu/bzr/brz/remove-bazaar

« back to all changes in this revision

Viewing changes to breezy/mergeable.py

  • Committer: Canonical.com Patch Queue Manager
  • Date: 2006-04-24 10:31:28 UTC
  • mfrom: (1684.1.2 bzr.mbp.integration)
  • Revision ID: pqm@pqm.ubuntu.com-20060424103128-a637f56a7c529bad
(mbp) tutorial improvements

Show diffs side-by-side

added added

removed removed

Lines of Context:
breezy/mergeable.py
1
 
# Copyright (C) 2005-2010 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
 
 
17
 
from __future__ import absolute_import
18
 
 
19
 
from .lazy_import import lazy_import
20
 
lazy_import(globals(), """
21
 
from breezy import (
22
 
    transport as _mod_transport,
23
 
    urlutils,
24
 
    )
25
 
from breezy.bzr.bundle import serializer as _serializer
26
 
from breezy.merge_directive import MergeDirective
27
 
from breezy.i18n import gettext
28
 
""")
29
 
 
30
 
from . import (
31
 
    errors,
32
 
    )
33
 
from .sixish import (
34
 
    BytesIO,
35
 
    )
36
 
from .trace import note
37
 
 
38
 
 
39
 
class Mergeable(object):
40
 
    """A mergeable object."""
41
 
 
42
 
    def install_revisions(self, repository):
43
 
        """Install the data from this mergeable into the specified repository.
44
 
 
45
 
        :param repository: Repository
46
 
        """
47
 
        raise NotImplementedError(self.install_revisions)
48
 
 
49
 
    def get_merge_request(self, repository):
50
 
        """Extract merge request data.
51
 
 
52
 
        :return: tuple with (base_revision_id, target_revision_id, verified)
53
 
        """
54
 
        raise NotImplementedError(self.get_merge_request)
55
 
 
56
 
 
57
 
def read_mergeable_from_url(url, _do_directive=True, possible_transports=None):
58
 
    """Read mergable object from a given URL.
59
 
 
60
 
    :return: An object supporting get_target_revision.  Raises NotABundle if
61
 
        the target is not a mergeable type.
62
 
    """
63
 
    child_transport = _mod_transport.get_transport(
64
 
        url, possible_transports=possible_transports)
65
 
    transport = child_transport.clone('..')
66
 
    filename = transport.relpath(child_transport.base)
67
 
    mergeable, transport = read_mergeable_from_transport(transport, filename,
68
 
                                                         _do_directive)
69
 
    return mergeable
70
 
 
71
 
 
72
 
def read_mergeable_from_transport(transport, filename, _do_directive=True):
73
 
    def get_bundle(transport):
74
 
        return BytesIO(transport.get_bytes(filename)), transport
75
 
 
76
 
    def redirected_transport(transport, exception, redirection_notice):
77
 
        note(redirection_notice)
78
 
        url, filename = urlutils.split(exception.target,
79
 
                                       exclude_trailing_slash=False)
80
 
        if not filename:
81
 
            raise errors.NotABundle(gettext('A directory cannot be a bundle'))
82
 
        return _mod_transport.get_transport_from_url(url)
83
 
 
84
 
    try:
85
 
        bytef, transport = _mod_transport.do_catching_redirections(
86
 
            get_bundle, transport, redirected_transport)
87
 
    except errors.TooManyRedirections:
88
 
        raise errors.NotABundle(transport.clone(filename).base)
89
 
    except (errors.ConnectionReset, errors.ConnectionError) as e:
90
 
        raise
91
 
    except (errors.TransportError, errors.PathError) as e:
92
 
        raise errors.NotABundle(str(e))
93
 
    except (IOError,) as e:
94
 
        # jam 20060707
95
 
        # Abstraction leakage, SFTPTransport.get('directory')
96
 
        # doesn't always fail at get() time. Sometimes it fails
97
 
        # during read. And that raises a generic IOError with
98
 
        # just the string 'Failure'
99
 
        # StubSFTPServer does fail during get() (because of prefetch)
100
 
        # so it has an opportunity to translate the error.
101
 
        raise errors.NotABundle(str(e))
102
 
 
103
 
    if _do_directive:
104
 
        try:
105
 
            return MergeDirective.from_lines(bytef), transport
106
 
        except errors.NotAMergeDirective:
107
 
            bytef.seek(0)
108
 
 
109
 
    return _serializer.read_bundle(bytef), transport