/brz/remove-bazaar

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  • Committer: Robert Collins
  • Date: 2010-05-06 11:08:10 UTC
  • mto: This revision was merged to the branch mainline in revision 5223.
  • Revision ID: robertc@robertcollins.net-20100506110810-h3j07fh5gmw54s25
Cleaner matcher matching revised unlocking protocol.

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dir.py
1
 
# Copyright (C) 2007 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
 
 
17
 
"""An adapter between a Git control dir and a Bazaar BzrDir."""
18
 
 
19
 
from bzrlib import (
20
 
    bzrdir,
21
 
    errors as bzr_errors,
22
 
    lockable_files,
23
 
    urlutils,
24
 
    version_info as bzrlib_version,
25
 
    )
26
 
 
27
 
LockWarner = getattr(lockable_files, "_LockWarner", None)
28
 
 
29
 
from bzrlib.plugins.git import (
30
 
    LocalGitBzrDirFormat,
31
 
    get_rich_root_format,
32
 
    )
33
 
 
34
 
 
35
 
class GitLock(object):
36
 
    """A lock that thunks through to Git."""
37
 
 
38
 
    def lock_write(self, token=None):
39
 
        pass
40
 
 
41
 
    def lock_read(self):
42
 
        pass
43
 
 
44
 
    def unlock(self):
45
 
        pass
46
 
 
47
 
    def peek(self):
48
 
        pass
49
 
 
50
 
    def validate_token(self, token):
51
 
        pass
52
 
 
53
 
    def break_lock(self):
54
 
        pass
55
 
 
56
 
 
57
 
class GitLockableFiles(lockable_files.LockableFiles):
58
 
    """Git specific lockable files abstraction."""
59
 
 
60
 
    def __init__(self, transport, lock):
61
 
        self._lock = lock
62
 
        self._transaction = None
63
 
        self._lock_mode = None
64
 
        self._transport = transport
65
 
        if LockWarner is None:
66
 
            # Bzr 1.13
67
 
            self._lock_count = 0
68
 
        else:
69
 
            self._lock_warner = LockWarner(repr(self))
70
 
 
71
 
 
72
 
class GitDir(bzrdir.BzrDir):
73
 
    """An adapter to the '.git' dir used by git."""
74
 
 
75
 
    def is_supported(self):
76
 
        return True
77
 
 
78
 
    def cloning_metadir(self, stacked=False):
79
 
        return get_rich_root_format(stacked)
80
 
 
81
 
    def _branch_name_to_ref(self, name):
82
 
        raise NotImplementedError(self._branch_name_to_ref)
83
 
 
84
 
    if bzrlib_version >= (2, 2):
85
 
        def open_branch(self, name=None, ignore_fallbacks=None,
86
 
            unsupported=False):
87
 
            return self._open_branch(name=name,
88
 
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
89
 
    else:
90
 
        def open_branch(self, ignore_fallbacks=None, unsupported=False):
91
 
            return self._open_branch(name=None,
92
 
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
93
 
 
94
 
 
95
 
class LocalGitDir(GitDir):
96
 
    """An adapter to the '.git' dir used by git."""
97
 
 
98
 
    def _get_gitrepository_class(self):
99
 
        from bzrlib.plugins.git.repository import LocalGitRepository
100
 
        return LocalGitRepository
101
 
 
102
 
    _gitrepository_class = property(_get_gitrepository_class)
103
 
 
104
 
    def __init__(self, transport, lockfiles, gitrepo, format):
105
 
        self._format = format
106
 
        self.root_transport = transport
107
 
        self._git = gitrepo
108
 
        if gitrepo.bare:
109
 
            self.transport = transport
110
 
        else:
111
 
            self.transport = transport.clone('.git')
112
 
        self._lockfiles = lockfiles
113
 
        self._mode_check_done = None
114
 
 
115
 
    def _branch_name_to_ref(self, name):
116
 
        from bzrlib.plugins.git.refs import branch_name_to_ref
117
 
        if name in (None, "HEAD"):
118
 
            from dulwich.repo import SYMREF
119
 
            refcontents = self._git.refs.read_ref("HEAD")
120
 
            if refcontents.startswith(SYMREF):
121
 
                name = refcontents[len(SYMREF):]
122
 
            else:
123
 
                name = "HEAD"
124
 
        return branch_name_to_ref(name, "HEAD")
125
 
 
126
 
    def is_control_filename(self, filename):
127
 
        return filename == '.git' or filename.startswith('.git/')
128
 
 
129
 
    def get_branch_transport(self, branch_format):
130
 
        if branch_format is None:
131
 
            return self.transport
132
 
        if isinstance(branch_format, LocalGitBzrDirFormat):
133
 
            return self.transport
134
 
        raise bzr_errors.IncompatibleFormat(branch_format, self._format)
135
 
 
136
 
    get_repository_transport = get_branch_transport
137
 
    get_workingtree_transport = get_branch_transport
138
 
 
139
 
    def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
140
 
        """'create' a branch for this dir."""
141
 
        repo = self.open_repository()
142
 
        from bzrlib.plugins.git.branch import LocalGitBranch
143
 
        return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
144
 
            self._lockfiles)
145
 
 
146
 
    def destroy_branch(self, name=None):
147
 
        del self._git.refs[self._branch_name_to_ref(name)]
148
 
 
149
 
    def list_branches(self):
150
 
        ret = []
151
 
        for name in self._git.get_refs():
152
 
            if name.startswith("refs/heads/"):
153
 
                ret.append(self.open_branch(name=name))
154
 
        return ret
155
 
 
156
 
    def open_repository(self, shared=False):
157
 
        """'open' a repository for this dir."""
158
 
        return self._gitrepository_class(self, self._lockfiles)
159
 
 
160
 
    def open_workingtree(self, recommend_upgrade=True):
161
 
        if not self._git.bare:
162
 
            from dulwich.errors import NoIndexPresent
163
 
            repo = self.open_repository()
164
 
            try:
165
 
                index = repo._git.open_index()
166
 
            except NoIndexPresent:
167
 
                pass
168
 
            else:
169
 
                from bzrlib.plugins.git.workingtree import GitWorkingTree
170
 
                return GitWorkingTree(self, repo, self.open_branch(), index)
171
 
        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
172
 
        raise bzr_errors.NoWorkingTree(loc)
173
 
 
174
 
    def create_repository(self, shared=False):
175
 
        return self.open_repository()
176
 
 
177
 
    def create_branch(self, name=None):
178
 
        refname = self._branch_name_to_ref(name)
179
 
        self._git.refs[refname] = "0" * 40
180
 
        return self.open_branch(name)
181
 
 
182
 
    def backup_bzrdir(self):
183
 
        if self._git.bare:
184
 
            self.root_transport.copy_tree(".git", ".git.backup")
185
 
            return (self.root_transport.abspath(".git"),
186
 
                    self.root_transport.abspath(".git.backup"))
187
 
        else:
188
 
            raise bzr_errors.BzrError("Unable to backup bare repositories")
189
 
 
190
 
    def create_workingtree(self, revision_id=None, from_branch=None,
191
 
        accelerator_tree=None, hardlink=False):
192
 
        if self._git.bare:
193
 
            raise bzr_errors.BzrError("Can't create working tree in a bare repo")
194
 
        from dulwich.index import write_index
195
 
        from dulwich.pack import SHA1Writer
196
 
        f = open(self.transport.local_abspath("index"), 'w+')
197
 
        try:
198
 
            f = SHA1Writer(f)
199
 
            write_index(f, [])
200
 
        finally:
201
 
            f.close()
202
 
        return self.open_workingtree()