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Viewing changes to bzrlib/branchbuilder.py

  • Committer: John Ferlito
  • Date: 2009-09-02 04:31:45 UTC
  • mto: (4665.7.1 serve-init)
  • mto: This revision was merged to the branch mainline in revision 4913.
  • Revision ID: johnf@inodes.org-20090902043145-gxdsfw03ilcwbyn5
Add a debian init script for bzr --serve

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bzrlib/branchbuilder.py
16
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17
"""Utility for create branches with particular contents."""
18
18
 
19
 
from . import (
20
 
    controldir,
 
19
from bzrlib import (
 
20
    bzrdir,
21
21
    commit,
22
22
    errors,
23
 
    revision,
 
23
    memorytree,
24
24
    )
25
25
 
26
26
 
36
36
 
37
37
    For instance:
38
38
 
39
 
    >>> from breezy.transport.memory import MemoryTransport
 
39
    >>> from bzrlib.transport.memory import MemoryTransport
40
40
    >>> builder = BranchBuilder(MemoryTransport("memory:///"))
41
41
    >>> builder.start_series()
42
 
    >>> builder.build_snapshot(None, [
43
 
    ...     ('add', ('', b'root-id', 'directory', '')),
44
 
    ...     ('add', ('filename', b'f-id', 'file', b'content\n'))],
45
 
    ...     revision_id=b'rev-id')
46
 
    b'rev-id'
47
 
    >>> builder.build_snapshot([b'rev-id'],
48
 
    ...     [('modify', ('filename', b'new-content\n'))],
49
 
    ...     revision_id=b'rev2-id')
50
 
    b'rev2-id'
 
42
    >>> builder.build_snapshot('rev-id', None, [
 
43
    ...     ('add', ('', 'root-id', 'directory', '')),
 
44
    ...     ('add', ('filename', 'f-id', 'file', 'content\n'))])
 
45
    'rev-id'
 
46
    >>> builder.build_snapshot('rev2-id', ['rev-id'],
 
47
    ...     [('modify', ('f-id', 'new-content\n'))])
 
48
    'rev2-id'
51
49
    >>> builder.finish_series()
52
50
    >>> branch = builder.get_branch()
53
51
 
65
63
            If the path of the transport does not exist but its parent does
66
64
            it will be created.
67
65
        :param format: Either a BzrDirFormat, or the name of a format in the
68
 
            controldir format registry for the branch to be built.
 
66
            bzrdir format registry for the branch to be built.
69
67
        :param branch: An already constructed branch to use.  This param is
70
68
            mutually exclusive with the transport and format params.
71
69
        """
83
81
            if format is None:
84
82
                format = 'default'
85
83
            if isinstance(format, str):
86
 
                format = controldir.format_registry.make_controldir(format)
87
 
            self._branch = controldir.ControlDir.create_branch_convenience(
 
84
                format = bzrdir.format_registry.make_bzrdir(format)
 
85
            self._branch = bzrdir.BzrDir.create_branch_convenience(
88
86
                transport.base, format=format, force_new_tree=False)
89
87
        self._tree = None
90
88
 
91
 
    def build_commit(self, parent_ids=None, allow_leftmost_as_ghost=False,
92
 
                     **commit_kwargs):
 
89
    def build_commit(self, **commit_kwargs):
93
90
        """Build a commit on the branch.
94
91
 
95
92
        This makes a commit with no real file content for when you only want
98
95
        :param commit_kwargs: Arguments to pass through to commit, such as
99
96
             timestamp.
100
97
        """
101
 
        if parent_ids is not None:
102
 
            if len(parent_ids) == 0:
103
 
                base_id = revision.NULL_REVISION
104
 
            else:
105
 
                base_id = parent_ids[0]
106
 
            if base_id != self._branch.last_revision():
107
 
                self._move_branch_pointer(
108
 
                    base_id, allow_leftmost_as_ghost=allow_leftmost_as_ghost)
109
 
        tree = self._branch.create_memorytree()
110
 
        with tree.lock_write():
111
 
            if parent_ids is not None:
112
 
                tree.set_parent_ids(
113
 
                    parent_ids,
114
 
                    allow_leftmost_as_ghost=allow_leftmost_as_ghost)
 
98
        tree = memorytree.MemoryTree.create_on_branch(self._branch)
 
99
        tree.lock_write()
 
100
        try:
115
101
            tree.add('')
116
102
            return self._do_commit(tree, **commit_kwargs)
 
103
        finally:
 
104
            tree.unlock()
117
105
 
118
 
    def _do_commit(self, tree, message=None, message_callback=None, **kwargs):
 
106
    def _do_commit(self, tree, message=None, **kwargs):
119
107
        reporter = commit.NullCommitReporter()
120
 
        if message is None and message_callback is None:
 
108
        if message is None:
121
109
            message = u'commit %d' % (self._branch.revno() + 1,)
122
 
        return tree.commit(message, message_callback=message_callback,
123
 
                           reporter=reporter, **kwargs)
 
110
        return tree.commit(message,
 
111
            reporter=reporter,
 
112
            **kwargs)
124
113
 
125
114
    def _move_branch_pointer(self, new_revision_id,
126
 
                             allow_leftmost_as_ghost=False):
 
115
        allow_leftmost_as_ghost=False):
127
116
        """Point self._branch to a different revision id."""
128
 
        with self._branch.lock_write():
 
117
        self._branch.lock_write()
 
118
        try:
129
119
            # We don't seem to have a simple set_last_revision(), so we
130
120
            # implement it here.
131
121
            cur_revno, cur_revision_id = self._branch.last_revision_info()
132
122
            try:
133
123
                g = self._branch.repository.get_graph()
134
 
                new_revno = g.find_distance_to_null(
135
 
                    new_revision_id, [(cur_revision_id, cur_revno)])
 
124
                new_revno = g.find_distance_to_null(new_revision_id,
 
125
                    [(cur_revision_id, cur_revno)])
136
126
                self._branch.set_last_revision_info(new_revno, new_revision_id)
137
127
            except errors.GhostRevisionsHaveNoRevno:
138
128
                if not allow_leftmost_as_ghost:
139
129
                    raise
140
130
                new_revno = 1
 
131
        finally:
 
132
            self._branch.unlock()
141
133
        if self._tree is not None:
142
134
            # We are currently processing a series, but when switching branch
143
135
            # pointers, it is easiest to just create a new memory tree.
145
137
            # We are cheating a little bit here, and locking the new tree
146
138
            # before the old tree is unlocked. But that way the branch stays
147
139
            # locked throughout.
148
 
            new_tree = self._branch.create_memorytree()
 
140
            new_tree = memorytree.MemoryTree.create_on_branch(self._branch)
149
141
            new_tree.lock_write()
150
142
            self._tree.unlock()
151
143
            self._tree = new_tree
160
152
        if self._tree is not None:
161
153
            raise AssertionError('You cannot start a new series while a'
162
154
                                 ' series is already going.')
163
 
        self._tree = self._branch.create_memorytree()
 
155
        self._tree = memorytree.MemoryTree.create_on_branch(self._branch)
164
156
        self._tree.lock_write()
165
157
 
166
158
    def finish_series(self):
168
160
        self._tree.unlock()
169
161
        self._tree = None
170
162
 
171
 
    def build_snapshot(self, parent_ids, actions, message=None, timestamp=None,
172
 
                       allow_leftmost_as_ghost=False, committer=None,
173
 
                       timezone=None, message_callback=None, revision_id=None):
 
163
    def build_snapshot(self, revision_id, parent_ids, actions,
 
164
        message=None, timestamp=None, allow_leftmost_as_ghost=False,
 
165
        committer=None, timezone=None):
174
166
        """Build a commit, shaped in a specific way.
175
167
 
176
 
        Most of the actions are self-explanatory.  'flush' is special action to
177
 
        break a series of actions into discrete steps so that complex changes
178
 
        (such as unversioning a file-id and re-adding it with a different kind)
179
 
        can be expressed in a way that will clearly work.
180
 
 
 
168
        :param revision_id: The handle for the new commit, can be None
181
169
        :param parent_ids: A list of parent_ids to use for the commit.
182
170
            It can be None, which indicates to use the last commit.
183
171
        :param actions: A list of actions to perform. Supported actions are:
184
 
            ('add', ('path', b'file-id', 'kind', b'content' or None))
185
 
            ('modify', ('path', b'new-content'))
186
 
            ('unversion', 'path')
 
172
            ('add', ('path', 'file-id', 'kind', 'content' or None))
 
173
            ('modify', ('file-id', 'new-content'))
 
174
            ('unversion', 'file-id')
187
175
            ('rename', ('orig-path', 'new-path'))
188
 
            ('flush', None)
189
176
        :param message: An optional commit message, if not supplied, a default
190
177
            commit message will be written.
191
 
        :param message_callback: A message callback to use for the commit, as
192
 
            per mutabletree.commit.
193
178
        :param timestamp: If non-None, set the timestamp of the commit to this
194
179
            value.
195
180
        :param timezone: An optional timezone for timestamp.
196
181
        :param committer: An optional username to use for commit
197
182
        :param allow_leftmost_as_ghost: True if the leftmost parent should be
198
183
            permitted to be a ghost.
199
 
        :param revision_id: The handle for the new commit, can be None
200
184
        :return: The revision_id of the new commit
201
185
        """
202
186
        if parent_ids is not None:
203
 
            if len(parent_ids) == 0:
204
 
                base_id = revision.NULL_REVISION
205
 
            else:
206
 
                base_id = parent_ids[0]
 
187
            base_id = parent_ids[0]
207
188
            if base_id != self._branch.last_revision():
208
 
                self._move_branch_pointer(
209
 
                    base_id, allow_leftmost_as_ghost=allow_leftmost_as_ghost)
 
189
                self._move_branch_pointer(base_id,
 
190
                    allow_leftmost_as_ghost=allow_leftmost_as_ghost)
210
191
 
211
192
        if self._tree is not None:
212
193
            tree = self._tree
213
194
        else:
214
 
            tree = self._branch.create_memorytree()
215
 
        with tree.lock_write():
 
195
            tree = memorytree.MemoryTree.create_on_branch(self._branch)
 
196
        tree.lock_write()
 
197
        try:
216
198
            if parent_ids is not None:
217
 
                tree.set_parent_ids(
218
 
                    parent_ids,
 
199
                tree.set_parent_ids(parent_ids,
219
200
                    allow_leftmost_as_ghost=allow_leftmost_as_ghost)
220
201
            # Unfortunately, MemoryTree.add(directory) just creates an
221
202
            # inventory entry. And the only public function to create a
222
203
            # directory is MemoryTree.mkdir() which creates the directory, but
223
204
            # also always adds it. So we have to use a multi-pass setup.
224
 
            pending = _PendingActions()
 
205
            to_add_directories = []
 
206
            to_add_files = []
 
207
            to_add_file_ids = []
 
208
            to_add_kinds = []
 
209
            new_contents = {}
 
210
            to_unversion_ids = []
 
211
            to_rename = []
225
212
            for action, info in actions:
226
213
                if action == 'add':
227
214
                    path, file_id, kind, content = info
228
215
                    if kind == 'directory':
229
 
                        pending.to_add_directories.append((path, file_id))
 
216
                        to_add_directories.append((path, file_id))
230
217
                    else:
231
 
                        pending.to_add_files.append(path)
232
 
                        pending.to_add_file_ids.append(file_id)
233
 
                        pending.to_add_kinds.append(kind)
 
218
                        to_add_files.append(path)
 
219
                        to_add_file_ids.append(file_id)
 
220
                        to_add_kinds.append(kind)
234
221
                        if content is not None:
235
 
                            pending.new_contents[path] = content
 
222
                            new_contents[file_id] = content
236
223
                elif action == 'modify':
237
 
                    path, content = info
238
 
                    pending.new_contents[path] = content
 
224
                    file_id, content = info
 
225
                    new_contents[file_id] = content
239
226
                elif action == 'unversion':
240
 
                    pending.to_unversion_paths.add(info)
 
227
                    to_unversion_ids.append(info)
241
228
                elif action == 'rename':
242
229
                    from_relpath, to_relpath = info
243
 
                    pending.to_rename.append((from_relpath, to_relpath))
244
 
                elif action == 'flush':
245
 
                    self._flush_pending(tree, pending)
246
 
                    pending = _PendingActions()
 
230
                    to_rename.append((from_relpath, to_relpath))
247
231
                else:
248
232
                    raise ValueError('Unknown build action: "%s"' % (action,))
249
 
            self._flush_pending(tree, pending)
250
 
            return self._do_commit(
251
 
                tree, message=message, rev_id=revision_id,
252
 
                timestamp=timestamp, timezone=timezone, committer=committer,
253
 
                message_callback=message_callback)
254
 
 
255
 
    def _flush_pending(self, tree, pending):
256
 
        """Flush the pending actions in 'pending', i.e. apply them to tree."""
257
 
        for path, file_id in pending.to_add_directories:
258
 
            if path == '':
259
 
                if tree.has_filename(path) \
260
 
                        and path in pending.to_unversion_paths:
261
 
                    # We're overwriting this path, no need to unversion
262
 
                    pending.to_unversion_paths.discard(path)
263
 
                # Special case, because the path already exists
264
 
                tree.add([path], [file_id], ['directory'])
265
 
            else:
266
 
                tree.mkdir(path, file_id)
267
 
        for from_relpath, to_relpath in pending.to_rename:
268
 
            tree.rename_one(from_relpath, to_relpath)
269
 
        if pending.to_unversion_paths:
270
 
            tree.unversion(pending.to_unversion_paths)
271
 
        tree.add(pending.to_add_files, pending.to_add_file_ids,
272
 
                 pending.to_add_kinds)
273
 
        for path, content in pending.new_contents.items():
274
 
            tree.put_file_bytes_non_atomic(path, content)
 
233
            if to_unversion_ids:
 
234
                tree.unversion(to_unversion_ids)
 
235
            for path, file_id in to_add_directories:
 
236
                if path == '':
 
237
                    # Special case, because the path already exists
 
238
                    tree.add([path], [file_id], ['directory'])
 
239
                else:
 
240
                    tree.mkdir(path, file_id)
 
241
            for from_relpath, to_relpath in to_rename:
 
242
                tree.rename_one(from_relpath, to_relpath)
 
243
            tree.add(to_add_files, to_add_file_ids, to_add_kinds)
 
244
            for file_id, content in new_contents.iteritems():
 
245
                tree.put_file_bytes_non_atomic(file_id, content)
 
246
            return self._do_commit(tree, message=message, rev_id=revision_id,
 
247
                timestamp=timestamp, timezone=timezone, committer=committer)
 
248
        finally:
 
249
            tree.unlock()
275
250
 
276
251
    def get_branch(self):
277
252
        """Return the branch created by the builder."""
278
253
        return self._branch
279
 
 
280
 
 
281
 
class _PendingActions(object):
282
 
    """Pending actions for build_snapshot to take.
283
 
 
284
 
    This is just a simple class to hold a bunch of the intermediate state of
285
 
    build_snapshot in single object.
286
 
    """
287
 
 
288
 
    def __init__(self):
289
 
        self.to_add_directories = []
290
 
        self.to_add_files = []
291
 
        self.to_add_file_ids = []
292
 
        self.to_add_kinds = []
293
 
        self.new_contents = {}
294
 
        self.to_unversion_paths = set()
295
 
        self.to_rename = []