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  • Committer: Jelmer Vernooij
  • Date: 2010-04-12 15:28:32 UTC
  • mto: (5147.4.2 more-colo)
  • mto: This revision was merged to the branch mainline in revision 5148.
  • Revision ID: jelmer@samba.org-20100412152832-nm7rf8o5p9v1wggk
Clarify segment/subsegment handling.

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removed removed

Lines of Context:
bzrlib/branch.py
63
63
BZR_BRANCH_FORMAT_6 = "Bazaar Branch Format 6 (bzr 0.15)\n"
64
64
 
65
65
 
66
 
class Branch(bzrdir.ControlComponent):
 
66
# TODO: Maybe include checks for common corruption of newlines, etc?
 
67
 
 
68
# TODO: Some operations like log might retrieve the same revisions
 
69
# repeatedly to calculate deltas.  We could perhaps have a weakref
 
70
# cache in memory to make this faster.  In general anything can be
 
71
# cached in memory between lock and unlock operations. .. nb thats
 
72
# what the transaction identity map provides
 
73
 
 
74
 
 
75
######################################################################
 
76
# branch objects
 
77
 
 
78
class Branch(object):
67
79
    """Branch holding a history of revisions.
68
80
 
69
 
    :ivar base:
70
 
        Base directory/url of the branch; using control_url and
71
 
        control_transport is more standardized.
 
81
    base
 
82
        Base directory/url of the branch.
72
83
 
73
84
    hooks: An instance of BranchHooks.
74
85
    """
76
87
    # - RBC 20060112
77
88
    base = None
78
89
 
79
 
    @property
80
 
    def control_transport(self):
81
 
        return self._transport
82
 
 
83
 
    @property
84
 
    def user_transport(self):
85
 
        return self.bzrdir.user_transport
86
 
 
87
90
    def __init__(self, *ignored, **ignored_too):
88
91
        self.tags = self._format.make_tags(self)
89
92
        self._revision_history_cache = None
104
107
        """Activate the branch/repository from url as a fallback repository."""
105
108
        repo = self._get_fallback_repository(url)
106
109
        if repo.has_same_location(self.repository):
107
 
            raise errors.UnstackableLocationError(self.user_url, url)
 
110
            raise errors.UnstackableLocationError(self.base, url)
108
111
        self.repository.add_fallback_repository(repo)
109
112
 
110
113
    def break_lock(self):
283
286
        new_history.reverse()
284
287
        return new_history
285
288
 
286
 
    def lock_write(self, token=None):
287
 
        """Lock the branch for write operations.
288
 
 
289
 
        :param token: A token to permit reacquiring a previously held and
290
 
            preserved lock.
291
 
        :return: A BranchWriteLockResult.
292
 
        """
 
289
    def lock_write(self):
293
290
        raise NotImplementedError(self.lock_write)
294
291
 
295
292
    def lock_read(self):
296
 
        """Lock the branch for read operations.
297
 
 
298
 
        :return: An object with an unlock method which will release the lock
299
 
            obtained.
300
 
        """
301
293
        raise NotImplementedError(self.lock_read)
302
294
 
303
295
    def unlock(self):
428
420
            * 'include' - the stop revision is the last item in the result
429
421
            * 'with-merges' - include the stop revision and all of its
430
422
              merged revisions in the result
431
 
            * 'with-merges-without-common-ancestry' - filter out revisions 
432
 
              that are in both ancestries
433
423
        :param direction: either 'reverse' or 'forward':
434
424
            * reverse means return the start_revision_id first, i.e.
435
425
              start at the most recent revision and go backwards in history
457
447
        # start_revision_id.
458
448
        if self._merge_sorted_revisions_cache is None:
459
449
            last_revision = self.last_revision()
460
 
            known_graph = self.repository.get_known_graph_ancestry(
461
 
                [last_revision])
 
450
            last_key = (last_revision,)
 
451
            known_graph = self.repository.revisions.get_known_graph_ancestry(
 
452
                [last_key])
462
453
            self._merge_sorted_revisions_cache = known_graph.merge_sort(
463
 
                last_revision)
 
454
                last_key)
464
455
        filtered = self._filter_merge_sorted_revisions(
465
456
            self._merge_sorted_revisions_cache, start_revision_id,
466
457
            stop_revision_id, stop_rule)
467
458
        # Make sure we don't return revisions that are not part of the
468
459
        # start_revision_id ancestry.
469
 
        filtered = self._filter_start_non_ancestors(filtered)
 
460
        filtered = self._filter_non_ancestors(filtered)
470
461
        if direction == 'reverse':
471
462
            return filtered
472
463
        if direction == 'forward':
509
500
                       node.end_of_merge)
510
501
                if rev_id == stop_revision_id:
511
502
                    return
512
 
        elif stop_rule == 'with-merges-without-common-ancestry':
513
 
            # We want to exclude all revisions that are already part of the
514
 
            # stop_revision_id ancestry.
515
 
            graph = self.repository.get_graph()
516
 
            ancestors = graph.find_unique_ancestors(start_revision_id,
517
 
                                                    [stop_revision_id])
518
 
            for node in rev_iter:
519
 
                rev_id = node.key[-1]
520
 
                if rev_id not in ancestors:
521
 
                    continue
522
 
                yield (rev_id, node.merge_depth, node.revno,
523
 
                       node.end_of_merge)
524
503
        elif stop_rule == 'with-merges':
525
504
            stop_rev = self.repository.get_revision(stop_revision_id)
526
505
            if stop_rev.parent_ids:
549
528
        else:
550
529
            raise ValueError('invalid stop_rule %r' % stop_rule)
551
530
 
552
 
    def _filter_start_non_ancestors(self, rev_iter):
 
531
    def _filter_non_ancestors(self, rev_iter):
553
532
        # If we started from a dotted revno, we want to consider it as a tip
554
533
        # and don't want to yield revisions that are not part of its
555
534
        # ancestry. Given the order guaranteed by the merge sort, we will see
616
595
        :param other: The branch to bind to
617
596
        :type other: Branch
618
597
        """
619
 
        raise errors.UpgradeRequired(self.user_url)
 
598
        raise errors.UpgradeRequired(self.base)
620
599
 
621
600
    def set_append_revisions_only(self, enabled):
622
601
        if not self._format.supports_set_append_revisions_only():
623
 
            raise errors.UpgradeRequired(self.user_url)
 
602
            raise errors.UpgradeRequired(self.base)
624
603
        if enabled:
625
604
            value = 'True'
626
605
        else:
674
653
    def get_old_bound_location(self):
675
654
        """Return the URL of the branch we used to be bound to
676
655
        """
677
 
        raise errors.UpgradeRequired(self.user_url)
 
656
        raise errors.UpgradeRequired(self.base)
678
657
 
679
658
    def get_commit_builder(self, parents, config=None, timestamp=None,
680
659
                           timezone=None, committer=None, revprops=None,
758
737
            stacking.
759
738
        """
760
739
        if not self._format.supports_stacking():
761
 
            raise errors.UnstackableBranchFormat(self._format, self.user_url)
 
740
            raise errors.UnstackableBranchFormat(self._format, self.base)
762
741
        # XXX: Changing from one fallback repository to another does not check
763
742
        # that all the data you need is present in the new fallback.
764
743
        # Possibly it should.
915
894
 
916
895
    def unbind(self):
917
896
        """Older format branches cannot bind or unbind."""
918
 
        raise errors.UpgradeRequired(self.user_url)
 
897
        raise errors.UpgradeRequired(self.base)
919
898
 
920
899
    def last_revision(self):
921
900
        """Return last revision id, or NULL_REVISION."""
1081
1060
        try:
1082
1061
            return urlutils.join(self.base[:-1], parent)
1083
1062
        except errors.InvalidURLJoin, e:
1084
 
            raise errors.InaccessibleParent(parent, self.user_url)
 
1063
            raise errors.InaccessibleParent(parent, self.base)
1085
1064
 
1086
1065
    def _get_parent_location(self):
1087
1066
        raise NotImplementedError(self._get_parent_location)
1565
1544
        """Return the short format description for this format."""
1566
1545
        raise NotImplementedError(self.get_format_description)
1567
1546
 
1568
 
    def _run_post_branch_init_hooks(self, a_bzrdir, name, branch):
1569
 
        hooks = Branch.hooks['post_branch_init']
1570
 
        if not hooks:
1571
 
            return
1572
 
        params = BranchInitHookParams(self, a_bzrdir, name, branch)
1573
 
        for hook in hooks:
1574
 
            hook(params)
1575
 
 
1576
1547
    def _initialize_helper(self, a_bzrdir, utf8_files, name=None,
1577
1548
                           lock_type='metadir', set_format=True):
1578
1549
        """Initialize a branch in a bzrdir, with specified files
1586
1557
            elsewhere)
1587
1558
        :return: a branch in this format
1588
1559
        """
1589
 
        mutter('creating branch %r in %s', self, a_bzrdir.user_url)
 
1560
        mutter('creating branch %r in %s', self, a_bzrdir.transport.base)
1590
1561
        branch_transport = a_bzrdir.get_branch_transport(self, name=name)
1591
1562
        lock_map = {
1592
1563
            'metadir': ('lock', lockdir.LockDir),
1614
1585
        finally:
1615
1586
            if lock_taken:
1616
1587
                control_files.unlock()
1617
 
        branch = self.open(a_bzrdir, name, _found=True)
1618
 
        self._run_post_branch_init_hooks(a_bzrdir, name, branch)
1619
 
        return branch
 
1588
        return self.open(a_bzrdir, name, _found=True)
1620
1589
 
1621
1590
    def initialize(self, a_bzrdir, name=None):
1622
1591
        """Create a branch of this format in a_bzrdir.
1782
1751
            "should return a tag name or None if no tag name could be "
1783
1752
            "determined. The first non-None tag name returned will be used.",
1784
1753
            (2, 2), None))
1785
 
        self.create_hook(HookPoint('post_branch_init',
1786
 
            "Called after new branch initialization completes. "
1787
 
            "post_branch_init is called with a "
1788
 
            "bzrlib.branch.BranchInitHookParams. "
1789
 
            "Note that init, branch and checkout (both heavyweight and "
1790
 
            "lightweight) will all trigger this hook.", (2, 2), None))
1791
 
        self.create_hook(HookPoint('post_switch',
1792
 
            "Called after a checkout switches branch. "
1793
 
            "post_switch is called with a "
1794
 
            "bzrlib.branch.SwitchHookParams.", (2, 2), None))
1795
1754
 
1796
1755
 
1797
1756
 
1837
1796
            self.old_revno, self.old_revid, self.new_revno, self.new_revid)
1838
1797
 
1839
1798
 
1840
 
class BranchInitHookParams(object):
1841
 
    """Object holding parameters passed to *_branch_init hooks.
1842
 
 
1843
 
    There are 4 fields that hooks may wish to access:
1844
 
 
1845
 
    :ivar format: the branch format
1846
 
    :ivar bzrdir: the BzrDir where the branch will be/has been initialized
1847
 
    :ivar name: name of colocated branch, if any (or None)
1848
 
    :ivar branch: the branch created
1849
 
 
1850
 
    Note that for lightweight checkouts, the bzrdir and format fields refer to
1851
 
    the checkout, hence they are different from the corresponding fields in
1852
 
    branch, which refer to the original branch.
1853
 
    """
1854
 
 
1855
 
    def __init__(self, format, a_bzrdir, name, branch):
1856
 
        """Create a group of BranchInitHook parameters.
1857
 
 
1858
 
        :param format: the branch format
1859
 
        :param a_bzrdir: the BzrDir where the branch will be/has been
1860
 
            initialized
1861
 
        :param name: name of colocated branch, if any (or None)
1862
 
        :param branch: the branch created
1863
 
 
1864
 
        Note that for lightweight checkouts, the bzrdir and format fields refer
1865
 
        to the checkout, hence they are different from the corresponding fields
1866
 
        in branch, which refer to the original branch.
1867
 
        """
1868
 
        self.format = format
1869
 
        self.bzrdir = a_bzrdir
1870
 
        self.name = name
1871
 
        self.branch = branch
1872
 
 
1873
 
    def __eq__(self, other):
1874
 
        return self.__dict__ == other.__dict__
1875
 
 
1876
 
    def __repr__(self):
1877
 
        if self.branch:
1878
 
            return "<%s of %s>" % (self.__class__.__name__, self.branch)
1879
 
        else:
1880
 
            return "<%s of format:%s bzrdir:%s>" % (
1881
 
                self.__class__.__name__, self.branch,
1882
 
                self.format, self.bzrdir)
1883
 
 
1884
 
 
1885
 
class SwitchHookParams(object):
1886
 
    """Object holding parameters passed to *_switch hooks.
1887
 
 
1888
 
    There are 4 fields that hooks may wish to access:
1889
 
 
1890
 
    :ivar control_dir: BzrDir of the checkout to change
1891
 
    :ivar to_branch: branch that the checkout is to reference
1892
 
    :ivar force: skip the check for local commits in a heavy checkout
1893
 
    :ivar revision_id: revision ID to switch to (or None)
1894
 
    """
1895
 
 
1896
 
    def __init__(self, control_dir, to_branch, force, revision_id):
1897
 
        """Create a group of SwitchHook parameters.
1898
 
 
1899
 
        :param control_dir: BzrDir of the checkout to change
1900
 
        :param to_branch: branch that the checkout is to reference
1901
 
        :param force: skip the check for local commits in a heavy checkout
1902
 
        :param revision_id: revision ID to switch to (or None)
1903
 
        """
1904
 
        self.control_dir = control_dir
1905
 
        self.to_branch = to_branch
1906
 
        self.force = force
1907
 
        self.revision_id = revision_id
1908
 
 
1909
 
    def __eq__(self, other):
1910
 
        return self.__dict__ == other.__dict__
1911
 
 
1912
 
    def __repr__(self):
1913
 
        return "<%s for %s to (%s, %s)>" % (self.__class__.__name__,
1914
 
            self.control_dir, self.to_branch,
1915
 
            self.revision_id)
1916
 
 
1917
 
 
1918
1799
class BzrBranchFormat4(BranchFormat):
1919
1800
    """Bzr branch format 4.
1920
1801
 
1979
1860
            if format.__class__ != self.__class__:
1980
1861
                raise AssertionError("wrong format %r found for %r" %
1981
1862
                    (format, self))
1982
 
        transport = a_bzrdir.get_branch_transport(None, name=name)
1983
1863
        try:
 
1864
            transport = a_bzrdir.get_branch_transport(None, name=name)
1984
1865
            control_files = lockable_files.LockableFiles(transport, 'lock',
1985
1866
                                                         lockdir.LockDir)
1986
1867
            return self._branch_class()(_format=self,
2184
2065
            # this format does not implement branch itself, thus the implicit
2185
2066
            # creation contract must see it as uninitializable
2186
2067
            raise errors.UninitializableFormat(self)
2187
 
        mutter('creating branch reference in %s', a_bzrdir.user_url)
 
2068
        mutter('creating branch reference in %s', a_bzrdir.transport.base)
2188
2069
        branch_transport = a_bzrdir.get_branch_transport(self, name=name)
2189
2070
        branch_transport.put_bytes('location',
2190
 
            target_branch.bzrdir.user_url)
 
2071
            target_branch.bzrdir.root_transport.base)
2191
2072
        branch_transport.put_bytes('format', self.get_format_string())
2192
 
        branch = self.open(
 
2073
        return self.open(
2193
2074
            a_bzrdir, name, _found=True,
2194
2075
            possible_transports=[target_branch.bzrdir.root_transport])
2195
 
        self._run_post_branch_init_hooks(a_bzrdir, name, branch)
2196
 
        return branch
2197
2076
 
2198
2077
    def __init__(self):
2199
2078
        super(BranchReferenceFormat, self).__init__()
2276
2155
    _legacy_formats[0].network_name(), _legacy_formats[0].__class__)
2277
2156
 
2278
2157
 
2279
 
class BranchWriteLockResult(object):
2280
 
    """The result of write locking a branch.
2281
 
 
2282
 
    :ivar branch_token: The token obtained from the underlying branch lock, or
2283
 
        None.
2284
 
    :ivar unlock: A callable which will unlock the lock.
2285
 
    """
2286
 
 
2287
 
    def __init__(self, unlock, branch_token):
2288
 
        self.branch_token = branch_token
2289
 
        self.unlock = unlock
2290
 
 
2291
 
 
2292
2158
class BzrBranch(Branch, _RelockDebugMixin):
2293
2159
    """A branch stored in the actual filesystem.
2294
2160
 
2328
2194
 
2329
2195
    def __str__(self):
2330
2196
        if self.name is None:
2331
 
            return '%s(%s)' % (self.__class__.__name__, self.user_url)
 
2197
            return '%s(%r)' % (self.__class__.__name__, self.base)
2332
2198
        else:
2333
 
            return '%s(%s,%s)' % (self.__class__.__name__, self.user_url,
2334
 
                self.name)
 
2199
            return '%s(%r,%r)' % (self.__class__.__name__, self.base, self.name)
2335
2200
 
2336
2201
    __repr__ = __str__
2337
2202
 
2348
2213
        return self.control_files.is_locked()
2349
2214
 
2350
2215
    def lock_write(self, token=None):
2351
 
        """Lock the branch for write operations.
2352
 
 
2353
 
        :param token: A token to permit reacquiring a previously held and
2354
 
            preserved lock.
2355
 
        :return: A BranchWriteLockResult.
2356
 
        """
2357
2216
        if not self.is_locked():
2358
2217
            self._note_lock('w')
2359
2218
        # All-in-one needs to always unlock/lock.
2365
2224
        else:
2366
2225
            took_lock = False
2367
2226
        try:
2368
 
            return BranchWriteLockResult(self.unlock,
2369
 
                self.control_files.lock_write(token=token))
 
2227
            return self.control_files.lock_write(token=token)
2370
2228
        except:
2371
2229
            if took_lock:
2372
2230
                self.repository.unlock()
2373
2231
            raise
2374
2232
 
2375
2233
    def lock_read(self):
2376
 
        """Lock the branch for read operations.
2377
 
 
2378
 
        :return: An object with an unlock method which will release the lock
2379
 
            obtained.
2380
 
        """
2381
2234
        if not self.is_locked():
2382
2235
            self._note_lock('r')
2383
2236
        # All-in-one needs to always unlock/lock.
2390
2243
            took_lock = False
2391
2244
        try:
2392
2245
            self.control_files.lock_read()
2393
 
            return self
2394
2246
        except:
2395
2247
            if took_lock:
2396
2248
                self.repository.unlock()
2565
2417
        return result
2566
2418
 
2567
2419
    def get_stacked_on_url(self):
2568
 
        raise errors.UnstackableBranchFormat(self._format, self.user_url)
 
2420
        raise errors.UnstackableBranchFormat(self._format, self.base)
2569
2421
 
2570
2422
    def set_push_location(self, location):
2571
2423
        """See Branch.set_push_location."""
2761
2613
        if _mod_revision.is_null(last_revision):
2762
2614
            return
2763
2615
        if last_revision not in self._lefthand_history(revision_id):
2764
 
            raise errors.AppendRevisionsOnlyViolation(self.user_url)
 
2616
            raise errors.AppendRevisionsOnlyViolation(self.base)
2765
2617
 
2766
2618
    def _gen_revision_history(self):
2767
2619
        """Generate the revision history from last revision
2867
2719
        if branch_location is None:
2868
2720
            return Branch.reference_parent(self, file_id, path,
2869
2721
                                           possible_transports)
2870
 
        branch_location = urlutils.join(self.user_url, branch_location)
 
2722
        branch_location = urlutils.join(self.base, branch_location)
2871
2723
        return Branch.open(branch_location,
2872
2724
                           possible_transports=possible_transports)
2873
2725
 
2919
2771
        return stacked_url
2920
2772
 
2921
2773
    def _get_append_revisions_only(self):
2922
 
        return self.get_config(
2923
 
            ).get_user_option_as_bool('append_revisions_only')
 
2774
        value = self.get_config().get_user_option('append_revisions_only')
 
2775
        return value == 'True'
2924
2776
 
2925
2777
    @needs_write_lock
2926
2778
    def generate_revision_history(self, revision_id, last_rev=None,
2988
2840
    """
2989
2841
 
2990
2842
    def get_stacked_on_url(self):
2991
 
        raise errors.UnstackableBranchFormat(self._format, self.user_url)
 
2843
        raise errors.UnstackableBranchFormat(self._format, self.base)
2992
2844
 
2993
2845
 
2994
2846
######################################################################
3081
2933
        :param verbose: Requests more detailed display of what was checked,
3082
2934
            if any.
3083
2935
        """
3084
 
        note('checked branch %s format %s', self.branch.user_url,
 
2936
        note('checked branch %s format %s', self.branch.base,
3085
2937
            self.branch._format)
3086
2938
        for error in self.errors:
3087
2939
            note('found error:%s', error)
3416
3268
        if local and not bound_location:
3417
3269
            raise errors.LocalRequiresBoundBranch()
3418
3270
        master_branch = None
3419
 
        if not local and bound_location and self.source.user_url != bound_location:
 
3271
        if not local and bound_location and self.source.base != bound_location:
3420
3272
            # not pulling from master, so we need to update master.
3421
3273
            master_branch = self.target.get_master_branch(possible_transports)
3422
3274
            master_branch.lock_write()