/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 refs.py

More work on roundtrip push support.

Show diffs side-by-side

added added

removed removed

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