/brz/remove-bazaar

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Viewing changes to dir.py

Avoid the use of InventoryDirectory.children. This speeds up 
imports significantly.

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dir.py
 
1
# Copyright (C) 2007 Canonical Ltd
 
2
#
 
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# 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
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# 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 (
 
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    bzrdir,
 
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    errors as bzr_errors,
 
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    lockable_files,
 
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    urlutils,
 
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    version_info as bzrlib_version,
 
25
    )
 
26
 
 
27
LockWarner = getattr(lockable_files, "_LockWarner", None)
 
28
 
 
29
from bzrlib.plugins.git import (
 
30
    LocalGitBzrDirFormat,
 
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    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
 
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        self._transport = transport
 
65
        if LockWarner is None:
 
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            # Bzr 1.13
 
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            self._lock_count = 0
 
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        else:
 
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            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
        from bzrlib.plugins.git.branch import branch_name_to_ref
 
83
        return branch_name_to_ref(name)
 
84
 
 
85
    if bzrlib_version >= (2, 2):
 
86
        def open_branch(self, name=None, ignore_fallbacks=None,
 
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            unsupported=False):
 
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            return self._open_branch(name=name,
 
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                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
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    else:
 
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        def open_branch(self, ignore_fallbacks=None, unsupported=False):
 
92
            return self._open_branch(name=None,
 
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                ignore_fallbacks=ignore_fallbacks, unsupported=unsupported)
 
94
 
 
95
 
 
96
class LocalGitDir(GitDir):
 
97
    """An adapter to the '.git' dir used by git."""
 
98
 
 
99
    def _get_gitrepository_class(self):
 
100
        from bzrlib.plugins.git.repository import LocalGitRepository
 
101
        return LocalGitRepository
 
102
 
 
103
    _gitrepository_class = property(_get_gitrepository_class)
 
104
 
 
105
    def __init__(self, transport, lockfiles, gitrepo, format):
 
106
        self._format = format
 
107
        self.root_transport = transport
 
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        self._git = gitrepo
 
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        if gitrepo.bare:
 
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            self.transport = transport
 
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        else:
 
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            self.transport = transport.clone('.git')
 
113
        self._lockfiles = lockfiles
 
114
        self._mode_check_done = None
 
115
 
 
116
    def is_control_filename(self, filename):
 
117
        return filename == '.git' or filename.startswith('.git/')
 
118
 
 
119
    def get_branch_transport(self, branch_format):
 
120
        if branch_format is None:
 
121
            return self.transport
 
122
        if isinstance(branch_format, LocalGitBzrDirFormat):
 
123
            return self.transport
 
124
        raise bzr_errors.IncompatibleFormat(branch_format, self._format)
 
125
 
 
126
    get_repository_transport = get_branch_transport
 
127
    get_workingtree_transport = get_branch_transport
 
128
 
 
129
    def _open_branch(self, name=None, ignore_fallbacks=None, unsupported=False):
 
130
        """'create' a branch for this dir."""
 
131
        repo = self.open_repository()
 
132
        from bzrlib.plugins.git.branch import LocalGitBranch
 
133
        return LocalGitBranch(self, repo, self._branch_name_to_ref(name),
 
134
            self._lockfiles)
 
135
 
 
136
    def destroy_branch(self, name=None):
 
137
        del self._git.refs[self._branch_name_to_ref(name)]
 
138
 
 
139
    def list_branches(self):
 
140
        ret = []
 
141
        for name in self._git.get_refs():
 
142
            if name.startswith("refs/heads/") or name == "HEAD":
 
143
                ret.append(self.open_branch(name=name))
 
144
        return ret
 
145
 
 
146
    def open_repository(self, shared=False):
 
147
        """'open' a repository for this dir."""
 
148
        return self._gitrepository_class(self, self._lockfiles)
 
149
 
 
150
    def open_workingtree(self, recommend_upgrade=True):
 
151
        if not self._git.bare:
 
152
            from dulwich.errors import NoIndexPresent
 
153
            repo = self.open_repository()
 
154
            try:
 
155
                index = repo._git.open_index()
 
156
            except NoIndexPresent:
 
157
                pass
 
158
            else:
 
159
                from bzrlib.plugins.git.workingtree import GitWorkingTree
 
160
                return GitWorkingTree(self, repo, self.open_branch(), index)
 
161
        loc = urlutils.unescape_for_display(self.root_transport.base, 'ascii')
 
162
        raise bzr_errors.NoWorkingTree(loc)
 
163
 
 
164
    def create_repository(self, shared=False):
 
165
        return self.open_repository()
 
166
 
 
167
    def create_branch(self, name=None):
 
168
        refname = self._branch_name_to_ref(name)
 
169
        self._git.refs[refname] = "0" * 40
 
170
        return self.open_branch(name)
 
171
 
 
172
    def backup_bzrdir(self):
 
173
        if self._git.bare:
 
174
            self.root_transport.copy_tree(".git", ".git.backup")
 
175
            return (self.root_transport.abspath(".git"),
 
176
                    self.root_transport.abspath(".git.backup"))
 
177
        else:
 
178
            raise bzr_errors.BzrError("Unable to backup bare repositories")
 
179
 
 
180
    def create_workingtree(self, revision_id=None, from_branch=None,
 
181
        accelerator_tree=None, hardlink=False):
 
182
        if self._git.bare:
 
183
            raise bzr_errors.BzrError("Can't create working tree in a bare repo")
 
184
        from dulwich.index import write_index
 
185
        from dulwich.pack import SHA1Writer
 
186
        f = open(self.transport.local_abspath("index"), 'w+')
 
187
        try:
 
188
            f = SHA1Writer(f)
 
189
            write_index(f, [])
 
190
        finally:
 
191
            f.close()
 
192
        return self.open_workingtree()