1
# Copyright (C) 2005 Canonical Ltd
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.
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.
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
18
## XXX: Can we do any better about making interrupted commits change
21
## XXX: If we merged two versions of a file then we still need to
22
## create a new version representing that merge, even if it didn't
23
## change from the parent.
25
## TODO: Read back the just-generated changeset, and make sure it
26
## applies and recreates the right state.
37
from binascii import hexlify
38
from cStringIO import StringIO
40
from bzrlib.osutils import (local_time_offset, username,
41
rand_bytes, compact_date, user_email,
42
kind_marker, is_inside_any, quotefn,
43
sha_string, sha_file, isdir, isfile)
44
from bzrlib.branch import gen_file_id
45
from bzrlib.errors import BzrError, PointlessCommit
46
from bzrlib.revision import Revision, RevisionReference
47
from bzrlib.trace import mutter, note
48
from bzrlib.xml5 import serializer_v5
49
from bzrlib.inventory import Inventory
50
from bzrlib.delta import compare_trees
51
from bzrlib.weave import Weave
52
from bzrlib.weavefile import read_weave, write_weave_v5
53
from bzrlib.atomicfile import AtomicFile
56
class NullCommitReporter(object):
57
"""I report on progress of a commit."""
58
def added(self, path):
61
def removed(self, path):
64
def renamed(self, old_path, new_path):
68
class ReportCommitToLog(NullCommitReporter):
69
def added(self, path):
70
note('added %s', path)
72
def removed(self, path):
73
note('removed %s', path)
75
def renamed(self, old_path, new_path):
76
note('renamed %s => %s', old_path, new_path)
80
"""Task of committing a new revision.
82
This is a MethodObject: it accumulates state as the commit is
83
prepared, and then it is discarded. It doesn't represent
84
historical revisions, just the act of recording a new one.
87
Modified to hold a list of files that have been deleted from
88
the working directory; these should be removed from the
93
if reporter is not None:
94
self.reporter = reporter
96
self.reporter = NullCommitReporter()
106
allow_pointless=True):
107
"""Commit working copy as a new revision.
109
The basic approach is to add all the file texts into the
110
store, then the inventory, then make a new revision pointing
111
to that inventory and store that.
113
This is not quite safe if the working copy changes during the
114
commit; for the moment that is simply not allowed. A better
115
approach is to make a temporary copy of the files before
116
computing their hashes, and then add those hashes in turn to
117
the inventory. This should mean at least that there are no
118
broken hash pointers. There is no way we can get a snapshot
119
of the whole directory at an instant. This would also have to
120
be robust against files disappearing, moving, etc. So the
121
whole thing is a bit hard.
123
This raises PointlessCommit if there are no changes, no new merges,
124
and allow_pointless is false.
126
timestamp -- if not None, seconds-since-epoch for a
127
postdated/predated commit.
130
If true, commit only those files.
133
If set, use this as the new revision id.
134
Useful for test or import commands that need to tightly
135
control what revisions are assigned. If you duplicate
136
a revision id that exists elsewhere it is your own fault.
137
If null (default), a time/random revision id is generated.
141
self.branch.lock_write()
143
self.specific_files = specific_files
144
self.allow_pointless = allow_pointless
146
if timestamp is None:
147
self.timestamp = time.time()
149
self.timestamp = long(timestamp)
151
if committer is None:
152
self.committer = username(self.branch)
154
assert isinstance(committer, basestring), type(committer)
155
self.committer = committer
158
self.timezone = local_time_offset()
160
self.timezone = int(timezone)
162
assert isinstance(message, basestring), type(message)
163
self.message = message
166
# First walk over the working inventory; and both update that
167
# and also build a new revision inventory. The revision
168
# inventory needs to hold the text-id, sha1 and size of the
169
# actual file versions committed in the revision. (These are
170
# not present in the working inventory.) We also need to
171
# detect missing/deleted files, and remove them from the
174
self.work_tree = self.branch.working_tree()
175
self.work_inv = self.work_tree.inventory
176
self.basis_tree = self.branch.basis_tree()
177
self.basis_inv = self.basis_tree.inventory
179
self.pending_merges = self.branch.pending_merges()
181
if self.rev_id is None:
182
self.rev_id = _gen_revision_id(self.branch, time.time())
184
# todo: update hashcache
185
self.delta = compare_trees(self.basis_tree, self.work_tree,
186
specific_files=self.specific_files)
188
if not (self.delta.has_changed()
189
or self.allow_pointless
190
or self.pending_merges):
191
raise PointlessCommit()
193
self.new_inv = self.basis_inv.copy()
195
self.delta.show(sys.stdout)
197
self._remove_deleted()
200
self.branch._write_inventory(self.work_inv)
201
self._record_inventory()
203
self._make_revision()
204
note('committted r%d {%s}', (self.branch.revno() + 1),
206
self.branch.append_revision(self.rev_id)
207
self.branch.set_pending_merges([])
212
def _record_inventory(self):
214
serializer_v5.write_inventory(self.new_inv, inv_tmp)
215
self.inv_sha1 = sha_string(inv_tmp.getvalue())
217
self.branch.inventory_store.add(inv_tmp, self.rev_id)
220
def _make_revision(self):
221
"""Record a new revision object for this commit."""
222
self.rev = Revision(timestamp=self.timestamp,
223
timezone=self.timezone,
224
committer=self.committer,
225
message=self.message,
226
inventory_sha1=self.inv_sha1,
227
revision_id=self.rev_id)
229
self.rev.parents = []
230
precursor_id = self.branch.last_patch()
232
self.rev.parents.append(RevisionReference(precursor_id))
233
for merge_rev in self.pending_merges:
234
rev.parents.append(RevisionReference(merge_rev))
236
rev_tmp = tempfile.TemporaryFile()
237
serializer_v5.write_revision(self.rev, rev_tmp)
239
self.branch.revision_store.add(rev_tmp, self.rev_id)
240
mutter('new revision_id is {%s}', self.rev_id)
243
def _remove_deleted(self):
244
"""Remove deleted files from the working and stored inventories."""
245
for path, id, kind in self.delta.removed:
246
if self.work_inv.has_id(id):
247
del self.work_inv[id]
248
if self.new_inv.has_id(id):
253
def _store_files(self):
254
"""Store new texts of modified/added files."""
255
for path, id, kind in self.delta.modified:
258
self._store_file_text(id)
260
for path, id, kind in self.delta.added:
263
self._store_file_text(id)
265
for old_path, new_path, id, kind, text_modified in self.delta.renamed:
268
if not text_modified:
270
self._store_file_text(id)
273
def _store_file_text(self, file_id):
274
"""Store updated text for one modified or added file."""
275
note('store new text for {%s} in revision {%s}', id, self.rev_id)
276
new_lines = self.work_tree.get_file(file_id).readlines()
277
self._add_text_to_weave(file_id, new_lines)
278
# update or add an entry
279
if file_id in self.new_inv:
280
ie = self.new_inv[file_id]
281
assert ie.file_id == file_id
283
ie = self.work_inv[file_id].copy()
285
assert ie.kind == 'file'
286
# make a new inventory entry for this file, using whatever
287
# it had in the working copy, plus details on the new text
288
ie.text_sha1 = _sha_strings(new_lines)
289
ie.text_size = sum(map(len, new_lines))
290
ie.text_version = self.rev_id
291
ie.entry_version = self.rev_id
294
def _add_text_to_weave(self, file_id, new_lines):
295
weave_fn = self.branch.controlfilename(['weaves', file_id+'.weave'])
296
if os.path.exists(weave_fn):
297
w = read_weave(file(weave_fn, 'rb'))
300
# XXX: Should set the appropriate parents by looking for this file_id
301
# in all revision parents
302
w.add(self.rev_id, [], new_lines)
303
af = AtomicFile(weave_fn)
305
write_weave_v5(w, af)
311
def _gen_revision_id(branch, when):
312
"""Return new revision-id."""
313
s = '%s-%s-' % (user_email(branch), compact_date(when))
314
s += hexlify(rand_bytes(8))
318
def _sha_strings(strings):
319
"""Return the sha-1 of concatenation of strings"""
321
map(s.update, strings)
added
removed
bzrlib/commit.py
