/brz/remove-bazaar

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Rename BzrDir to ControlDir.

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dir.py
 
1
# Copyright (C) 2007 Canonical Ltd
 
2
# Copyright (C) 2010 Jelmer Vernooij
 
3
#
 
4
# This program is free software; you can redistribute it and/or modify
 
5
# it under the terms of the GNU General Public License as published by
 
6
# the Free Software Foundation; either version 2 of the License, or
 
7
# (at your option) any later version.
 
8
#
 
9
# This program is distributed in the hope that it will be useful,
 
10
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
11
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
12
# GNU General Public License for more details.
 
13
#
 
14
# You should have received a copy of the GNU General Public License
 
15
# along with this program; if not, write to the Free Software
 
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
17
 
 
18
"""An adapter between a Git control dir and a Bazaar ControlDir."""
 
19
 
 
20
from bzrlib import (
 
21
    bzrdir,
 
22
    errors as bzr_errors,
 
23
    lockable_files,
 
24
    urlutils,
 
25
    version_info as bzrlib_version,
 
26
    )
 
27
 
 
28
LockWarner = getattr(lockable_files, "_LockWarner", None)
 
29
 
 
30
from bzrlib.plugins.git import (
 
31
    LocalGitControlDirFormat,
 
32
    )
 
33
try:
 
34
    from bzrlib.controldir import (
 
35
        ControlDir,
 
36
        )
 
37
except ImportError:
 
38
    # bzr < 2.3
 
39
    from bzrlib.bzrdir import (
 
40
        BzrDir,
 
41
        )
 
42
    ControlDir = BzrDir
 
43
 
 
44
 
 
45
class GitLock(object):
 
46
    """A lock that thunks through to Git."""
 
47
 
 
48
    def lock_write(self, token=None):
 
49
        pass
 
50
 
 
51
    def lock_read(self):
 
52
        pass
 
53
 
 
54
    def unlock(self):
 
55
        pass
 
56
 
 
57
    def peek(self):
 
58
        pass
 
59
 
 
60
    def validate_token(self, token):
 
61
        pass
 
62
 
 
63
    def break_lock(self):
 
64
        pass
 
65
 
 
66
 
 
67
class GitLockableFiles(lockable_files.LockableFiles):
 
68
    """Git specific lockable files abstraction."""
 
69
 
 
70
    def __init__(self, transport, lock):
 
71
        self._lock = lock
 
72
        self._transaction = None
 
73
        self._lock_mode = None
 
74
        self._transport = transport
 
75
        if LockWarner is None:
 
76
            # Bzr 1.13
 
77
            self._lock_count = 0
 
78
        else:
 
79
            self._lock_warner = LockWarner(repr(self))
 
80
 
 
81
 
 
82
class GitDir(ControlDir):
 
83
    """An adapter to the '.git' dir used by git."""
 
84
 
 
85
    def is_supported(self):
 
86
        return True
 
87
 
 
88
    def can_convert_format(self):
 
89
        return False
 
90
 
 
91
    def cloning_metadir(self, stacked=False):
 
92
        return bzrdir.format_registry.make_bzrdir("default")
 
93
 
 
94
    def _branch_name_to_ref(self, name):
 
95
        raise NotImplementedError(self._branch_name_to_ref)
 
96
 
 
97
    if bzrlib_version >= (2, 2):
 
98
        def open_branch(self, name=None, unsupported=False, 
 
99
            ignore_fallbacks=None):
 
100
            return self._open_branch(name=name,
 
101
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
102
    else:
 
103
        def open_branch(self, ignore_fallbacks=None, unsupported=False):
 
104
            return self._open_branch(name=None,
 
105
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
106
 
 
107
 
 
108
class LocalGitDir(GitDir):
 
109
    """An adapter to the '.git' dir used by git."""
 
110
 
 
111
    def _get_gitrepository_class(self):
 
112
        from bzrlib.plugins.git.repository import LocalGitRepository
 
113
        return LocalGitRepository
 
114
 
 
115
    _gitrepository_class = property(_get_gitrepository_class)
 
116
 
 
117
    def __init__(self, transport, lockfiles, gitrepo, format):
 
118
        self._format = format
 
119
        self.root_transport = transport
 
120
        self._git = gitrepo
 
121
        if gitrepo.bare:
 
122
            self.transport = transport
 
123
        else:
 
124
            self.transport = transport.clone('.git')
 
125
        self._lockfiles = lockfiles
 
126
        self._mode_check_done = None
 
127
 
 
128
    def _branch_name_to_ref(self, name):
 
129
        from bzrlib.plugins.git.refs import branch_name_to_ref
 
130
        ref = branch_name_to_ref(name, None)
 
131
        if ref == "HEAD":
 
132
            from dulwich.repo import SYMREF
 
133
            refcontents = self._git.refs.read_ref(ref)
 
134
            if refcontents.startswith(SYMREF):
 
135
                ref = refcontents[len(SYMREF):]
 
136
        return ref
 
137
 
 
138
    def is_control_filename(self, filename):
 
139
        return filename == '.git' or filename.startswith('.git/')
 
140
 
 
141
    def get_branch_transport(self, branch_format, name=None):
 
142
        if branch_format is None:
 
143
            return self.transport
 
144
        if isinstance(branch_format, LocalGitControlDirFormat):
 
145
            return self.transport
 
146
        raise bzr_errors.IncompatibleFormat(branch_format, self._format)
 
147
 
 
148
    def get_repository_transport(self, format):
 
149
        if format is None:
 
150
            return self.transport
 
151
        if isinstance(format, LocalGitControlDirFormat):
 
152
            return self.transport
 
153
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
154
 
 
155
    def get_workingtree_transport(self, format):
 
156
        if format is None:
 
157
            return self.transport
 
158
        if isinstance(format, LocalGitControlDirFormat):
 
159
            return self.transport
 
160
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
161
 
 
162
    def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
 
163
        """'create' a branch for this dir."""
 
164
        repo = self.open_repository()
 
165
        from bzrlib.plugins.git.branch import LocalGitBranch
 
166
        return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
 
167
            self._lockfiles)
 
168
 
 
169
    def destroy_branch(self, name=None):
 
170
        refname = self._branch_name_to_ref(name)
 
171
        if not refname in self._git.refs:
 
172
            raise bzr_errors.NotBranchError(self.root_transport.base,
 
173
                    bzrdir=self)
 
174
        del self._git.refs[refname]
 
175
 
 
176
    def destroy_repository(self):
 
177
        raise bzr_errors.UnsupportedOperation(self.destroy_repository, self)
 
178
 
 
179
    def destroy_workingtree(self):
 
180
        raise bzr_errors.UnsupportedOperation(self.destroy_workingtree, self)
 
181
 
 
182
    def needs_format_conversion(self, format=None):
 
183
        return not isinstance(self._format, format.__class__)
 
184
 
 
185
    def list_branches(self):
 
186
        ret = []
 
187
        for name in self._git.get_refs():
 
188
            if name.startswith("refs/heads/"):
 
189
                ret.append(self.open_branch(name=name))
 
190
        return ret
 
191
 
 
192
    def open_repository(self, shared=False):
 
193
        """'open' a repository for this dir."""
 
194
        return self._gitrepository_class(self, self._lockfiles)
 
195
 
 
196
    def open_workingtree(self, recommend_upgrade=True):
 
197
        if not self._git.bare:
 
198
            from dulwich.errors import NoIndexPresent
 
199
            repo = self.open_repository()
 
200
            try:
 
201
                index = repo._git.open_index()
 
202
            except NoIndexPresent:
 
203
                pass
 
204
            else:
 
205
                from bzrlib.plugins.git.workingtree import GitWorkingTree
 
206
                try:
 
207
                    branch = self.open_branch()
 
208
                except bzr_errors.NotBranchError:
 
209
                    pass
 
210
                else:
 
211
                    return GitWorkingTree(self, repo, branch, index)
 
212
        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
 
213
        raise bzr_errors.NoWorkingTree(loc)
 
214
 
 
215
    def create_repository(self, shared=False):
 
216
        return self.open_repository()
 
217
 
 
218
    def create_branch(self, name=None):
 
219
        refname = self._branch_name_to_ref(name)
 
220
        from dulwich.protocol import ZERO_SHA
 
221
        self._git.refs[refname or "HEAD"] = ZERO_SHA
 
222
        return self.open_branch(name)
 
223
 
 
224
    def backup_bzrdir(self):
 
225
        if self._git.bare:
 
226
            self.root_transport.copy_tree(".git", ".git.backup")
 
227
            return (self.root_transport.abspath(".git"),
 
228
                    self.root_transport.abspath(".git.backup"))
 
229
        else:
 
230
            raise bzr_errors.BzrError("Unable to backup bare repositories")
 
231
 
 
232
    def create_workingtree(self, revision_id=None, from_branch=None,
 
233
        accelerator_tree=None, hardlink=False):
 
234
        if self._git.bare:
 
235
            raise bzr_errors.BzrError("Can't create working tree in a bare repo")
 
236
        from dulwich.index import write_index
 
237
        from dulwich.pack import SHA1Writer
 
238
        f = open(self.transport.local_abspath("index"), 'w+')
 
239
        try:
 
240
            f = SHA1Writer(f)
 
241
            write_index(f, [])
 
242
        finally:
 
243
            f.close()
 
244
        return self.open_workingtree()