/brz/remove-bazaar

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Support non-ascii characters in tag names.

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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 BzrDir."""
 
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
    LocalGitBzrDirFormat,
 
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 can_convert_format(self):
 
79
        return False
 
80
 
 
81
    def cloning_metadir(self, stacked=False):
 
82
        return bzrdir.format_registry.make_bzrdir("default")
 
83
 
 
84
    def _branch_name_to_ref(self, name):
 
85
        raise NotImplementedError(self._branch_name_to_ref)
 
86
 
 
87
    if bzrlib_version >= (2, 2):
 
88
        def open_branch(self, name=None, unsupported=False, 
 
89
            ignore_fallbacks=None):
 
90
            return self._open_branch(name=name,
 
91
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
92
    else:
 
93
        def open_branch(self, ignore_fallbacks=None, unsupported=False):
 
94
            return self._open_branch(name=None,
 
95
                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
96
 
 
97
 
 
98
class LocalGitDir(GitDir):
 
99
    """An adapter to the '.git' dir used by git."""
 
100
 
 
101
    def _get_gitrepository_class(self):
 
102
        from bzrlib.plugins.git.repository import LocalGitRepository
 
103
        return LocalGitRepository
 
104
 
 
105
    _gitrepository_class = property(_get_gitrepository_class)
 
106
 
 
107
    def __init__(self, transport, lockfiles, gitrepo, format):
 
108
        self._format = format
 
109
        self.root_transport = transport
 
110
        self._git = gitrepo
 
111
        if gitrepo.bare:
 
112
            self.transport = transport
 
113
        else:
 
114
            self.transport = transport.clone('.git')
 
115
        self._lockfiles = lockfiles
 
116
        self._mode_check_done = None
 
117
 
 
118
    def _branch_name_to_ref(self, name):
 
119
        from bzrlib.plugins.git.refs import branch_name_to_ref
 
120
        ref = branch_name_to_ref(name, None)
 
121
        if ref == "HEAD":
 
122
            from dulwich.repo import SYMREF
 
123
            refcontents = self._git.refs.read_ref(ref)
 
124
            if refcontents.startswith(SYMREF):
 
125
                ref = refcontents[len(SYMREF):]
 
126
        return ref
 
127
 
 
128
    def is_control_filename(self, filename):
 
129
        return filename == '.git' or filename.startswith('.git/')
 
130
 
 
131
    def get_branch_transport(self, branch_format, name=None):
 
132
        if branch_format is None:
 
133
            return self.transport
 
134
        if isinstance(branch_format, LocalGitBzrDirFormat):
 
135
            return self.transport
 
136
        raise bzr_errors.IncompatibleFormat(branch_format, self._format)
 
137
 
 
138
    def get_repository_transport(self, format):
 
139
        if format is None:
 
140
            return self.transport
 
141
        if isinstance(format, LocalGitBzrDirFormat):
 
142
            return self.transport
 
143
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
144
 
 
145
    def get_workingtree_transport(self, format):
 
146
        if format is None:
 
147
            return self.transport
 
148
        if isinstance(format, LocalGitBzrDirFormat):
 
149
            return self.transport
 
150
        raise bzr_errors.IncompatibleFormat(format, self._format)
 
151
 
 
152
    def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
 
153
        """'create' a branch for this dir."""
 
154
        repo = self.open_repository()
 
155
        from bzrlib.plugins.git.branch import LocalGitBranch
 
156
        return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
 
157
            self._lockfiles)
 
158
 
 
159
    def destroy_branch(self, name=None):
 
160
        refname = self._branch_name_to_ref(name)
 
161
        if not refname in self._git.refs:
 
162
            raise bzr_errors.NotBranchError(self.root_transport.base,
 
163
                    bzrdir=self)
 
164
        del self._git.refs[refname]
 
165
 
 
166
    def destroy_repository(self):
 
167
        raise bzr_errors.UnsupportedOperation(self.destroy_repository, self)
 
168
 
 
169
    def destroy_workingtree(self):
 
170
        raise bzr_errors.UnsupportedOperation(self.destroy_workingtree, self)
 
171
 
 
172
    def needs_format_conversion(self, format=None):
 
173
        return not isinstance(self._format, format.__class__)
 
174
 
 
175
    def list_branches(self):
 
176
        ret = []
 
177
        for name in self._git.get_refs():
 
178
            if name.startswith("refs/heads/"):
 
179
                ret.append(self.open_branch(name=name))
 
180
        return ret
 
181
 
 
182
    def open_repository(self, shared=False):
 
183
        """'open' a repository for this dir."""
 
184
        return self._gitrepository_class(self, self._lockfiles)
 
185
 
 
186
    def open_workingtree(self, recommend_upgrade=True):
 
187
        if not self._git.bare:
 
188
            from dulwich.errors import NoIndexPresent
 
189
            repo = self.open_repository()
 
190
            try:
 
191
                index = repo._git.open_index()
 
192
            except NoIndexPresent:
 
193
                pass
 
194
            else:
 
195
                from bzrlib.plugins.git.workingtree import GitWorkingTree
 
196
                try:
 
197
                    branch = self.open_branch()
 
198
                except bzr_errors.NotBranchError:
 
199
                    pass
 
200
                else:
 
201
                    return GitWorkingTree(self, repo, branch, index)
 
202
        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
 
203
        raise bzr_errors.NoWorkingTree(loc)
 
204
 
 
205
    def create_repository(self, shared=False):
 
206
        return self.open_repository()
 
207
 
 
208
    def create_branch(self, name=None):
 
209
        refname = self._branch_name_to_ref(name)
 
210
        from dulwich.protocol import ZERO_SHA
 
211
        self._git.refs[refname or "HEAD"] = ZERO_SHA
 
212
        return self.open_branch(name)
 
213
 
 
214
    def backup_bzrdir(self):
 
215
        if self._git.bare:
 
216
            self.root_transport.copy_tree(".git", ".git.backup")
 
217
            return (self.root_transport.abspath(".git"),
 
218
                    self.root_transport.abspath(".git.backup"))
 
219
        else:
 
220
            raise bzr_errors.BzrError("Unable to backup bare repositories")
 
221
 
 
222
    def create_workingtree(self, revision_id=None, from_branch=None,
 
223
        accelerator_tree=None, hardlink=False):
 
224
        if self._git.bare:
 
225
            raise bzr_errors.BzrError("Can't create working tree in a bare repo")
 
226
        from dulwich.index import write_index
 
227
        from dulwich.pack import SHA1Writer
 
228
        f = open(self.transport.local_abspath("index"), 'w+')
 
229
        try:
 
230
            f = SHA1Writer(f)
 
231
            write_index(f, [])
 
232
        finally:
 
233
            f.close()
 
234
        return self.open_workingtree()