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  • Committer: Robert Collins
  • Date: 2010-05-06 07:48:22 UTC
  • mto: This revision was merged to the branch mainline in revision 5223.
  • Revision ID: robertc@robertcollins.net-20100506074822-0bsgf2j4h8jx0xkk
Added ``bzrlib.tests.matchers`` as a place to put matchers, along with
our first in-tree matcher. See the module docstring for details.
(Robert Collins)

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refs.py
1
 
# Copyright (C) 2010 Jelmer Vernooij <jelmer@samba.org>
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
 
 
17
 
"""Conversion between refs and Bazaar revision pointers."""
18
 
 
19
 
from dulwich.repo import (
20
 
    RefsContainer,
21
 
    )
22
 
 
23
 
from bzrlib import (
24
 
    errors,
25
 
    )
26
 
 
27
 
is_tag = lambda x: x.startswith("refs/tags/")
28
 
 
29
 
 
30
 
def extract_tags(refs):
31
 
    """Extract the tags from a refs dictionary.
32
 
 
33
 
    :param refs: Refs to extract the tags from.
34
 
    :return: Dictionary mapping tag names to SHA1s of the actual object
35
 
        and unpeeled object SHA1s.
36
 
    """
37
 
    ret = {}
38
 
    for k, v in refs.iteritems():
39
 
        if is_tag(k) and not k.endswith("^{}"):
40
 
            try:
41
 
                peeled = refs[k+"^{}"]
42
 
                unpeeled = v
43
 
            except KeyError:
44
 
                peeled = v
45
 
                unpeeled = None
46
 
            try:
47
 
                tagname = ref_to_tag_name(k)
48
 
            except UnicodeDecodeError:
49
 
                pass
50
 
            else:
51
 
                ret[tagname] = (peeled, unpeeled)
52
 
    return ret
53
 
 
54
 
 
55
 
def branch_name_to_ref(name, default=None):
56
 
    """Map a branch name to a ref.
57
 
 
58
 
    :param name: Branch name
59
 
    :return: ref string
60
 
    """
61
 
    if name is None:
62
 
        return default
63
 
    if name == "HEAD":
64
 
        return name
65
 
    if not name.startswith("refs/"):
66
 
        return "refs/heads/%s" % name
67
 
    else:
68
 
        return name
69
 
 
70
 
 
71
 
def tag_name_to_ref(name):
72
 
    """Map a tag name to a ref.
73
 
 
74
 
    :param name: Tag name
75
 
    :return: ref string
76
 
    """
77
 
    return "refs/tags/%s" % name
78
 
 
79
 
 
80
 
def ref_to_branch_name(ref):
81
 
    """Map a ref to a branch name
82
 
 
83
 
    :param ref: Ref
84
 
    :return: A branch name
85
 
    """
86
 
    if ref in (None, "HEAD"):
87
 
        return ref
88
 
    if ref.startswith("refs/heads/"):
89
 
        return ref[len("refs/heads/"):]
90
 
    raise ValueError("unable to map ref %s back to branch name" % ref)
91
 
 
92
 
 
93
 
def ref_to_tag_name(ref):
94
 
    if ref.startswith("refs/tags/"):
95
 
        return ref[len('refs/tags/'):].decode("utf-8")
96
 
    raise ValueError("unable to map ref %s back to tag name" % ref)
97
 
 
98
 
 
99
 
class BazaarRefsContainer(RefsContainer):
100
 
 
101
 
    def __init__(self, dir, object_store):
102
 
        self.dir = dir
103
 
        self.object_store = object_store
104
 
 
105
 
    def set_symbolic_ref(self, name, other):
106
 
        if name == "HEAD":
107
 
            pass # FIXME: Switch default branch
108
 
        else:
109
 
            raise NotImplementedError(
110
 
                "Symbolic references not supported for anything other than "
111
 
                "HEAD")
112
 
 
113
 
    def _get_revid_by_tag_name(self, tag_name):
114
 
        for branch in self.dir.list_branches():
115
 
            try:
116
 
                # FIXME: This is ambiguous!
117
 
                return branch.tags.lookup_tag(tag_name)
118
 
            except errors.NoSuchTag:
119
 
                pass
120
 
        return None
121
 
 
122
 
    def _get_revid_by_branch_name(self, branch_name):
123
 
        try:
124
 
            branch = self.dir.open_branch(branch_name)
125
 
        except errors.NoColocatedBranchSupport:
126
 
            if branch_name in ("HEAD", "master"):
127
 
                branch = self.dir.open_branch()
128
 
            else:
129
 
                raise
130
 
        return branch.last_revision()
131
 
 
132
 
    def read_loose_ref(self, ref):
133
 
        try:
134
 
            branch_name = ref_to_branch_name(ref)
135
 
        except ValueError:
136
 
            tag_name = ref_to_tag_name(ref)
137
 
            revid = self._get_revid_by_tag_name(tag_name)
138
 
        else:
139
 
            revid = self._get_revid_by_branch_name(branch_name)
140
 
        return self.object_store._lookup_revision_sha1(revid)
141
 
 
142
 
    def allkeys(self):
143
 
        keys = set()
144
 
        for branch in self.dir.list_branches():
145
 
            repo = branch.repository
146
 
            if repo.has_revision(branch.last_revision()):
147
 
                ref = branch_name_to_ref(branch.name, "refs/heads/master")
148
 
                keys.add(ref)
149
 
                if branch.name is None:
150
 
                    keys.add("HEAD")
151
 
            for tag_name, revid in branch.tags.get_tag_dict().iteritems():
152
 
                if repo.has_revision(revid):
153
 
                    keys.add(tag_name_to_ref(tag_name))
154
 
        return keys
155
 
 
156
 
    def __delitem__(self, ref):
157
 
        try:
158
 
            branch_name = ref_to_branch_name(ref)
159
 
        except ValueError:
160
 
            return # FIXME: Cope with tags!
161
 
        self.dir.destroy_branch(branch_name)
162
 
 
163
 
    def __setitem__(self, ref, sha):
164
 
        try:
165
 
            branch_name = ref_to_branch_name(ref)
166
 
        except ValueError:
167
 
            # FIXME: Cope with tags!
168
 
            return
169
 
        try:
170
 
            target_branch = self.repo_dir.open_branch(branch_name)
171
 
        except errors.NotBranchError:
172
 
            target_branch = self.repo.create_branch(branch_name)
173
 
 
174
 
        rev_id = self.mapping.revision_id_foreign_to_bzr(sha)
175
 
        target_branch.lock_write()
176
 
        try:
177
 
            target_branch.generate_revision_history(rev_id)
178
 
        finally:
179
 
            target_branch.unlock()