~bzr-pqm/bzr/1.17

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####################
Bazaar Release Notes
####################


.. contents:: List of Releases
   :depth: 1


bzr 1.17 "So late it's brunch" 2009-07-20
#########################################
:Codename: so-late-its-brunch
:1.17rc1: 2009-07-13
:1.17: 2009-07-20

Bazaar continues to blaze a straight and shining path to the 2.0 release and
the elevation of the ``2a`` beta format to the full glory of "supported and
stable".

Highlights in this release include greatly reduced memory consumption during
commits, faster ``ls``, faster ``annotate``, faster network operations if
you're specifying a revision number and the final destruction of those
annoying progress bar artifacts.


Changes from 1.17rc1 to 1.17final
*********************************

* Change an extension to call the python ``frozenset()`` rather than the C
  api ``PyFrozenSet_New``. It turns out that python2.4 did not expose the
  C api. (John Arbash Meinel, #399366)

* Fixes for the Makefile and the rename of ``generate_docs.py`` to
  ``tools/generate_docs.py`` to allow everything to be built on Windows.
  (John Arbash Meinel, #399356)

* ``bzr serve`` once again applies a ``ChrootServer`` to the given
  directory before serving it. (Andrew Bennetts, #400535)


Compatibility Breaks
********************

* ``bzr register-branch`` from the Launchpad plugin now refers to "project"
  instead of "product" which is the correct Launchpad terminology.  The
  --product option is deprecated and users should switch to using --project.
  (Neil Martinsen-Burrell, #238764)


New Features
************

* ``bzr push`` now aborts if uncommitted changes (including pending merges)
  are present in the working tree (if one is present) and no revision is
  speified. The configuration option ``push_strict`` can be used to set the
  default for this behavior.  (Vincent Ladeuil, #284038, #322808, #65286)

* ``bzr revno`` and ``bzr revision-info`` now have a ``--tree`` option to
  show revision info for the working tree instead of the branch.
  (Matthew Fuller, John Arbash Meinel)

* ``bzr send`` now aborts if uncommitted changes (including pending merges)
  are present in the working tree and no revision is specified. The
  configuration option ``send_strict`` can be used to set the default for this
  behavior.
  (Vincent Ladeuil, #206577)


Bug Fixes
*********

* Accept uppercase "Y/N" to prompts such as from break lock. 
  (#335182, Tim Powell, Martin Pool)

* Add documentation about diverged branches and how to fix them in the
  centralized workflow with local commits.  Mention ``bzr help
  diverged-branches`` when a push fails because the branches have
  diverged.  (Neil Martinsen-Burrell, #269477)

* Annotate would sometimes 'latch on' to trivial lines, causing important
  lines to be incorrectly annotated. (John Arbash Meinel, #387952)

* Automatic format upgrades triggered by default stacking policies on a
  1.16rc1 (or later) smart server work again.
  (Andrew Bennetts, #388675)

* Avoid progress bar artifacts being left behind on the screen.
  (Martin Pool, #321935)

* Better message in ``bzr split`` error suggesting a rich root format.
  (Neil Martinsen-Burrell, #220067)

* ``Branch.set_append_revisions_only`` now works with branches on a smart
  server. (Andrew Bennetts, #365865)

* By default, ``bzr branch`` will fail if the target directory exists, but
  does not already have a control directory.  The flag ``--use-existing-dir``
  will allow operation to proceed.  (Alexander Belchenko, #307554)

* ``bzr ls DIR --from-root`` now shows only things in DIR, not everything.
  (Ian Clatworthy)

* Fetch between repositories does not error if they have inconsistent data
  that should be irrelevant to the fetch operation. (Aaron Bentley)

* Fix ``AttributeError`` exception when reconfiguring lightweight checkout 
  of a remote repository.
  (Jelmer Vernooij, #332194)

* Fix bug in decoding v3 smart server messages when receiving multiple
  lots of excess bytes after an end-of-message.
  (Andrew Bennetts)

* Force deletion of readonly files during merge, update and other tree
  transforms.
  (Craig Hewetson, Martin Pool, #218206)

* Force socket shutdown in threaded http test servers to avoid client hangs
  (pycurl).  (Vincent Ladeuil, #383920).

* ``LRUCache`` will maintain the linked list pointers even if a nodes
  cleanup function raises an exception. (John Arbash Meinel, #396838)

* Progress bars are now suppressed again when the environment variable
  ``BZR_PROGRESS_BAR`` is set to ``none``.
  (Martin Pool, #339385)

* Reduced memory consumption during ``bzr commit`` of large files. For
  pre 2a formats, should be down to ~3x the size of a file.
  For ``--2a`` format repositories, it is down to the size of the file
  content plus the size of the compressed text.  Related to bug #109114.
  (John Arbash Meinel)

* Set hidden attribute on .bzr directory below unicode path should never
  fail with error. The operation should succeed even if bzr unable to set 
  the attribute.  (Alexander Belchenko, related to bug #335362).
  
* Stacking will no longer accept requests to stack on the same
  branch/repository. Existing branches that incorrectly reference the same
  repository in a stacking configuration will now raise
  UnstackableLocationError when the branch is opened. This can be fixed by
  removing the stacking location inside ``.bzr/branch``.
  (Robert Collins, #376243)

* The ``log+`` decorator, useful in debugging or profiling, could cause
  "AttributeError: 'list' object has no attribute 'next'".  This is now
  fixed.  The log decorator no longer shows the elapsed time or transfer
  rate because they're available in the log prefixes and the transport
  activity display respectively.
  (Martin Pool, #340347)

* Unshelve works correctly when multiple zero-length files are present on
  the shelf. (Aaron Bentley, #363444)

* Progress bars no longer show the network transport scheme or direction.
  (Martin Pool)

* launchpad-login now respects the 'verbose' option.
  (Jonathan Lange, #217031)


Internals
*********

* ``bzrlib.user_encoding`` is now officially deprecated. It is not
  possible to write a deprecation wrapper, but the variable will be
  removed in the near future. Use ``bzrlib.osutils.get_user_encoding()``
  instead. (Alexander Belchenko)

* Command lookup has had hooks added. ``bzrlib.Command.hooks`` has
  three new hook points: ``get_command``, ``get_missing_command`` and
  ``list_commands``, which allow just-in-time command name provision
  rather than requiring all command names be known a-priori.
  (Robert Collins)

* ``get_app_path`` from win32utils.py now supports REG_EXPAND_SZ data type
  and can read path to wordpad.exe. (Alexander Belchenko, #392046)

* ``graph.KnownGraph`` has been added. This is a class that can give
  answers to ``heads()`` very quickly. However, it has the assumption that
  the whole graph has already been loaded. This is true during
  ``annotate`` so it is used there with good success (as much as 2x faster
  for files with long ancestry and 'cherrypicked' changes.)
  (John Arbash Meinel, Vincent Ladeuil)

* OS file locks are now taken out using ``CreateFile`` rather than
  ``LockFileEx`` on Windows. The locking remains exclusive with
  ``LockFileEx`` but now it also works on older versions of Windows (such
  as Win98). (Martin <gzlist>)

* pack <=> pack fetching is now done via a ``PackStreamSource`` rather
  than the ``Packer`` code. The user visible change is that we now
  properly fetch the minimum number of texts for non-smart fetching.
  (John Arbash Meinel)


* ``VersionedFiles._add_text`` is a new api that lets us insert text into
  the repository as a single string, rather than a list of lines. This can
  improve memory overhead and performance of committing large files.
  (Currently a private api, used only by commit). (John Arbash Meinel)


Improvements
************

* ``bzr annotate`` can now be significantly faster. The time for
  ``bzr annotate NEWS`` is down to 7s from 22s in 1.16. Files with long
  histories and lots of 'duplicate insertions' will be improved more than
  others. (John Arbash Meinel, Vincent Ladeuil)

* ``bzr ls`` is now faster. On OpenOffice.org, the time drops from 2.4
  to 1.1 seconds. The improvement for ``bzr ls -r-1`` is more
  substantial dropping from 54.3 to 1.1 seconds. (Ian Clatworthy)

* Improve "Path(s) are not versioned" error reporting for some commands.
  (Benoît PIERRE)

* Initial commit performance in ``--2a`` repositories has been improved by
  making it cheaper to build the initial CHKMap. (John Arbash Meinel)

* Resolving a revno to a revision id on a branch accessed via ``bzr://``
  or ``bzr+ssh://`` is now much faster and involves no VFS operations.
  This speeds up commands like ``bzr pull -r 123``.  (Andrew Bennetts)

* ``revision-info`` now properly aligns the revnos/revids in the output
  and doesn't traceback when given revisions not in the current branch.
  Performance is also significantly improved when requesting multiple revs
  at once.  (Matthew Fuller, John Arbash Meinel)

* Tildes are no longer escaped by Transports. (Andy Kilner)


Documentation
*************

* Avoid bad text wrapping in generated documentation.  Slightly better
  formatting in the user reference.
  (Martin Pool, #249908)

* Minor clarifications to the help for End-Of-Line conversions.
  (Ian Clatworthy)

API Changes
***********

* Removed overspecific error class ``InvalidProgressBarType``.
  (Martin Pool)

* The method ``ProgressView._show_transport_activity`` is now
  ``show_transport_activity`` because it's part of the contract between
  this class and the UI.  (Martin Pool)


bzr 1.16.1 2009-06-26
#####################

End user testing of the 2a format revealed two serious bugs. The first,
#365615, caused bzr to raise AbsentContentFactory errors when autopacking.
This meant that commits or pushes to 2a-format repositories failed
intermittently.

The second bug, #390563, caused the smart server to raise AbsentContentFactory
when streaming 2a stacked 2a-format branches. This particularly affected
branches stored on Launchpad in the 2a format.

Both of these bugs cause command failures only, neither of them cause data
corruption or data loss. And, of course, both of these bugs are now fixed.

Bug Fixes
*********

* We now properly request a more minimal set of file texts when fetching
  multiple revisions. (Robert Collins, John Arbash Meinel, #390563)

* Repositories using CHK pages (which includes the new 2a format) will no
  longer error during commit or push operations when an autopack operation
  is triggered. (Robert Collins, #365615)

* ``chk_map.iter_interesting_nodes`` now properly uses the *intersection*
  of referenced nodes rather than the *union* to determine what
  uninteresting pages we still need to look at. Prior to this,
  incrementally pushing to stacked branch would push the minimal data, but
  fetching everything would request extra texts. There are some unhandled
  cases wrt trees of different depths, but this fixes the common cases.
  (Robert Collins, John Arbash Meinel, #390563)

* ``GroupCompress`` repositories now take advantage of the pack hints
  parameter to permit cross-format fetching to incrementally pack the
  converted data. (Robert Collins)

* ``Repository.commit_write_group`` now returns opaque data about what
  was committed, for passing to the ``Repository.pack``. Repositories
  without atomic commits will still return None. (Robert Collins)

* ``Repository.pack`` now takes an optional ``hint`` parameter
  which will support doing partial packs for repositories that can do
  that. (Robert Collins)

* RepositoryFormat has a new attribute 'pack_compresses' which is True
  when doing a pack operation changes the compression of content in the
  repository. (Robert Collins)

* ``StreamSink`` and ``InterDifferingSerialiser`` will call
  ``Repository.pack`` with the hint returned by
  ``Repository.commit_write_group`` if the formats were different and the
  repository can increase compression by doing a pack operation.
  (Robert Collins, #376748)


bzr 1.16 "It's yesterday in California" 2009-06-18
##################################################
:Codename: yesterday-in-california
:1.16rc1: 2009-06-11
:1.16: 2009-06-18

This version of Bazaar contains the beta release of the new ``2a`` repository
format, suitable for testing by fearless, advanced users. This format or an
updated version of it will become the default format in Bazaar 2.0. Please
read the NEWS entry before even thinking about upgrading to the new format.

Also included are speedups for many operations on huge projects, a bug fix for
pushing stacked new stacked branches to smart servers and the usual bevy of
bug fixes and improvements.


Changes from 1.16rc1 to 1.16final
*********************************

* Fix the nested tree flag check so that upgrade from development formats to
  2a can work correctly.
  (Jelmer Vernooij, #388727)

* Automatic format upgrades triggered by default stacking policies on a
  1.16rc1 (or later) smart server work again.
  (Andrew Bennetts, #388675)


Compatibility Breaks
********************

* Display prompt on stderr (instead of stdout) when querying users so
  that the output of commands can be safely redirected.
  (Vincent Ladeuil, #376582)


New Features
************

* A new repository format ``2a`` has been added.  This is a beta release
  of the the brisbane-core (aka group-compress) project.  This format now
  suitable for wider testing by advanced users willing to deal with some
  bugs.  We would appreciate test reports, either positive or negative.
  Format 2a is substantially smaller and faster for many operations on
  many trees.  This format or an updated version will become the default
  in bzr 2.0.

  This is a rich-root format, so this repository format can be used with
  bzr-svn.  Bazaar branches in previous non-rich-root formats can be
  converted (including by merge, push and pull) to format 2a, but not vice
  versa.  We recommend upgrading previous development formats to 2a.

  Upgrading to this format can take considerable time because it expands
  and more concisely repacks the full history.

  If you use stacked branches, you must upgrade the stacked branches
  before the stacked-on branches.  (See <https://bugs.launchpad.net/bugs/374735>)

* ``--development7-rich-root`` is a new dev format, similar to ``--dev6``
  but using a Revision serializer using bencode rather than XML.
  (Jelmer Vernooij, John Arbash Meinel)

* mail_client=claws now supports --body (and message body hooks).  Also uses
  configured from address.  (Barry Warsaw)

Improvements
************


* ``--development6-rich-root`` can now stack. (Modulo some smart-server
  bugs with stacking and non default formats.)
  (John Arbash Meinel, #373455)

* ``--development6-rich-root`` delays generating a delta index for the
  first object inserted into a group. This has a beneficial impact on
  ``bzr commit`` since each committed texts goes to its own group. For
  committing a 90MB file, it drops peak memory by about 200MB, and speeds
  up commit from 7s => 4s. (John Arbash Meinel)

* Numerous operations are now faster for huge projects, i.e. those
  with a large number of files and/or a large number of revisions,
  particularly when the latest development format is used. These
  operations (and improvements on OpenOffice.org) include:

  * branch in a shared repository (2X faster)
  * branch --no-tree (100X faster)
  * diff (2X faster)
  * tags (70X faster)

  (Ian Clatworthy)

* Pyrex version of ``bencode`` support. This provides optimized support
  for both encoding and decoding, and is now found at ``bzrlib.bencode``.
  ``bzrlib.utils.bencode`` is now deprecated.
  (Alexander Belchenko, Jelmer Vernooij, John Arbash Meinel)


Bug Fixes
*********

* Bazaar can now pass attachment files to the mutt email client.
  (Edwin Grubbs, #384158)

* Better message in ``bzr add`` output suggesting using ``bzr ignored`` to
  see which files can also be added.  (Jason Spashett, #76616)

* ``bzr pull -r 123`` from a stacked branch on a smart server no longer fails.
  Also, the ``Branch.revision_history()`` API now works in the same
  situation.  (Andrew Bennetts, #380314)
  
* ``bzr serve`` on Windows no longer displays a traceback simply because a
  TCP client disconnected. (Andrew Bennetts)

* Clarify the rules for locking and fallback repositories. Fix bugs in how
  ``RemoteRepository`` was handling fallbacks along with the
  ``_real_repository``. (Andrew Bennetts, John Arbash Meinel, #375496)

* Fix a small bug with fetching revisions w/ ghosts into a new stacked
  branch. Not often triggered, because it required ghosts to be part of
  the fetched revisions, not in the stacked-on ancestry.
  (John Arbash Meinel)

* Fix status and commit to work with content filtered trees, addressing
  numerous bad bugs with line-ending support. (Ian Clatworthy, #362030)

* Fix problem of "directory not empty" when contending for a lock over
  sftp.  (Martin Pool, #340352)

* Fix rule handling so that eol is optional, not mandatory.
  (Ian Clatworthy, #379370)

* Pushing a new stacked branch to a 1.15 smart server was broken due to a
  bug in the ``BzrDirFormat.initialize_ex`` smart verb.  This is fixed in
  1.16, but required changes to the network protocol, so the
  ``BzrDirFormat.initialize_ex`` verb has been removed and replaced with a
  corrected ``BzrDirFormat.initialize_ex_1.16`` verb.  1.15 clients will
  still work with a 1.16 server as they will fallback to slower (and
  bug-free) methods.
  (Jonathan Lange, Robert Collins, Andrew Bennetts, #385132)

* Reconcile can now deal with text revisions that originated in revisions 
  that are ghosts. (Jelmer Vernooij, #336749)

* Support cloning of branches with ghosts in the left hand side history.
  (Jelmer Vernooij, #248540)

* The ''bzr diff'' now catches OSError from osutils.rmtree and logs a
  helpful message to the trace file, unless the temp directory really was
  removed (which would be very strange).  Since the diff operation has
  succeeded from the user's perspective, no output is written to stderr 
  or stdout.  (Maritza Mendez, #363837)

* Translate errors received from a smart server in response to a
  ``BzrDirFormat.initialize`` or ``BzrDirFormat.initialize_ex`` request.
  This was causing tracebacks even for mundane errors like
  ``PermissionDenied``.  (Andrew Bennetts, #381329)

Documentation
*************

* Added directory structure and started translation of docs in Russian.
  (Alexey Shtokalo, Alexander Iljin, Alexander Belchenko, Dmitry Vasiliev,
  Volodymyr Kotulskyi)

API Changes
***********

* Added osutils.parent_directories(). (Ian Clatworthy)

* ``bzrlib.progress.ProgressBar``, ``ChildProgress``, ``DotsProgressBar``,
  ``TTYProgressBar`` and ``child_progress`` are now deprecated; use
  ``ui_factory.nested_progress_bar`` instead.  (Martin Pool)

* ``graph.StackedParentsProvider`` is now a public API, replacing
  ``graph._StackedParentsProvider``. The api is now considered stable and ready
  for external users. (Gary van der Merwe)

* ``bzrlib.user_encoding`` is deprecated in favor of
  ``get_user_encoding``.  (Alexander Belchenko)

* TreeTransformBase no longer assumes that limbo is provided via disk.
  DiskTreeTransform now provides disk functionality.  (Aaron Bentley)

Internals
*********

* Remove ``weave.py`` script for accessing internals of old weave-format
  repositories.  (Martin Pool)

Testing
*******

* The number of cores is now correctly detected on OSX. (John Szakmeister)

* The number of cores is also detected on Solaris and win32. (Vincent Ladeuil)

* The number of cores is also detected on FreeBSD. (Matthew Fuller)


bzr 1.15
########
:1.15rc1: 2009-05-16
:1.15: 2009-05-22
:1.15.1: 2009-06-09

The smart server will no longer raise 'NoSuchRevision' when streaming content
with a size mismatch in a reconstructed graph search. New command ``bzr
dpush``. Plugins can now define their own annotation tie-breaker when two
revisions introduce the exact same line.

Changes from 1.15.1 to 1.15.2
*****************************

* Use zdll on Windows to build ``_chk_map_pyx`` extension.
  (Alexander Belchenko)

Changes from 1.15final to 1.15.1
*********************************

* Translate errors received from a smart server in response to a
  ``BzrDirFormat.initialize`` or ``BzrDirFormat.initialize_ex`` request.
  This was causing tracebacks even for mundane errors like
  ``PermissionDenied``.  (Andrew Bennetts, #381329)

Changes from 1.15rc1 to 1.15final
*********************************

* No changes

Compatibility Breaks
********************

* ``bzr ls`` is no longer recursive by default. To recurse, use the
  new ``-R`` option. The old ``--non-recursive`` option has been removed.
  If you alias ``ls`` to ``ls -R``, you can disable recursion using
  ``--no-recursive`` instead.  (Ian Clatworthy)

New Features
************

* New command ``bzr dpush`` that can push changes to foreign 
  branches (svn, git) without setting custom bzr-specific metadata.
  (Jelmer Vernooij)

* The new development format ``--development6-rich-root`` now supports
  stacking. We chose not to use a new format marker, since old clients
  will just fail to open stacked branches, the same as if we used a new
  format flag. (John Arbash Meinel, #373455)

* Plugins can now define their own annotation tie-breaker when two revisions
  introduce the exact same line. See ``bzrlib.annotate._break_annotation_tie``
  Be aware though that this is temporary, private (as indicated by the leading
  '_') and a first step to address the problem. (Vincent Ladeuil, #348459)

* New command ``bzr dpush`` that can push changes to foreign 
  branches (svn, git) without setting custom bzr-specific metadata.
  (Jelmer Vernooij)

* ``bzr send`` will now check the ``child_submit_format`` setting in
  the submit branch to determine what format to use, if none was 
  specified on the command-line.  (Jelmer Vernooij)

Improvements
************

* -Dhpss output now includes the number of VFS calls made to the remote
  server. (Jonathan Lange)

* ``--coverage`` works for code running in threads too.
  (Andrew Bennets, Vincent Ladeuil)

* ``bzr pull`` now has a ``--local`` option to only make changes to the
  local branch, and not the bound master branch.
  (Gary van der Merwe, #194716)

* ``bzr rm *`` is now as fast as ``bzr rm * --keep``. (Johan Walles, #180116)

Bug Fixes
*********

* Adding now works properly when path contains a symbolic link.
  (Geoff Bache, #183831)

* An error is now raised for unknown eol values. (Brian de Alwis, #358199)

* ``bzr merge --weave`` will now generate a conflict if one side deletes a
  line, and the other side modifies the line. (John Arbash Meinel, #328171)

* ``bzr reconfigure --standalone`` no longer raises IncompatibleRepositories.
  (Martin von Gagern, #248932)

* ``bzr send`` works to send emails again using MAPI.
  (Neil Martinsen-Burrell, #346998)

* Check for missing parent inventories in StreamSink.  This prevents
  incomplete stacked branches being created by 1.13 bzr:// and
  bzr+ssh:// clients (which have bug #354036).  Instead, the server now
  causes those clients to send the missing records.  (Andrew Bennetts)

* Correctly handle http servers proposing multiple authentication schemes.
  (Vincent Ladeuil, #366107)

* End-Of-Line content filters are now loaded correctly.
  (Ian Clatworthy, Brian de Alwis, #355280)

* Fix a bug in the pure-python ``GroupCompress`` code when handling copies
  longer than 64KiB. (John Arbash Meinel, #364900)

* Fix TypeError in running ``bzr break-lock`` on some URLs.
  (Alexander Belchenko, Martin Pool, #365891)

* Non-recursive ``bzr ls`` now works properly when a path is specified.
  (Jelmer Vernooij, #357863)

* ssh usernames (defined in ~/.ssh/config) are honoured for bzr+ssh connections.
  (Vincent Ladeuil, #367726)

* Several bugs related to unicode symlinks have been fixed and the test suite
  enhanced to better catch regressions for them. (Vincent Ladeuil)

* The smart server will no longer raise 'NoSuchRevision' when streaming
  content with a size mismatch in a reconstructed graph search: it assumes
  that the client will make sure it is happy with what it got, and this
  sort of mismatch is normal for stacked environments.
  bzr 1.13.0/1 will stream from unstacked branches only - in that case not
  getting all the content expected would be a bug. However the graph
  search is how we figured out what we wanted, so a mismatch is both odd
  and unrecoverable without starting over, and starting over will end up
  with the same data as if we just permitted the mismatch. If data is
  gc'd, doing a new search will find only the truncated data, so sending
  only the truncated data seems reasonable. bzr versions newer than this
  will stream from stacked branches and check the stream to find missing
  content in the stacked-on branch, and thus will handle the situation
  implicitly.  (Robert Collins, #360791)

* Upgrading to, or fetching into a 'rich-root' format will now correctly
  set the root data the same way that reconcile does.
  (Robert Collins, #368921)

* Using unicode Windows API to obtain command-line arguments.
  (Alexander Belchenko, #375934)

Documentation
*************

API Changes
***********

* ``InterPackRepo.fetch`` and ``RepoFetcher`` now raise ``NoSuchRevision``
  instead of ``InstallFailed`` when they detect a missing revision.
  ``InstallFailed`` itself has been deleted. (Jonathan Lange)

* Not passing arguments to ``bzrlib.commands.main()`` will now grab the
  arguments from ``osutils.get_unicode_argv()`` which has proper support
  for unicode arguments on windows. Further, the supplied arguments are now 
  required to be unicode strings, rather than user_encoded strings.
  (Alexander Belchenko)

Internals
*********

* ``bzrlib.branch.Branch.set_parent`` is now present on the base branch
  class and will call ``_set_parent_location`` after doing unicode 
  encoding. (Robert Collins)

* ``bzrlib.remote.RemoteBranch._set_parent_location`` will use a new verb
  ``Branch.set_parent_location`` removing further VFS operations.
  (Robert Collins)

* ``bzrlib.bzrdir.BzrDir._get_config`` now returns a ``TransportConfig``
  or similar when the dir supports configuration settings. The base class
  defaults to None. There is a matching new server verb
  ``BzrDir.get-config_file`` to reduce roundtrips for getting BzrDir
  configuration. (Robert Collins)

* ``bzrlib.tests.ExtendedTestResult`` has new methods ``startTests``
  called before the first test is started, ``done`` called after the last
  test completes, and a new parameter ``strict``. (Robert Collins)

* ``-Dhpss`` when passed to bzr will cause a backtrace to be printed when
  VFS operations are started on a smart server repository. This should not
  occur on regular push and pull operations, and is a key indicator for
  performance regressions. (Robert Collins)

* ``-Dlock`` when passed to the selftest (e.g. ``bzr -Dlock selftest``) will
  cause mismatched physical locks to cause test errors rather than just
  reporting to the screen. (Robert Collins)

* Fallback ``CredentialStore`` instances registered with ``fallback=True``
  are now be able to provide credentials if obtaining credentials 
  via ~/.bazaar/authentication.conf fails. (Jelmer Vernooij, 
  Vincent Ladeuil, #321918)

* New hook ``Lock.lock_broken`` which runs when a lock is
  broken. This is mainly for testing that lock/unlock are
  balanced in tests. (Vincent Ladeuil)

* New MergeDirective hook 'merge_request_body' allows hooks to supply or
  alter a body for the message produced by ``bzr send``.

* New smart server verb ``BzrDir.initialize_ex`` which implements a
  refactoring to the core of clone allowing less round trips on new
  branches. (Robert Collins)

* New method ``Tags.rename_revisions`` that can rename revision ids tags
  are pointing at. (Jelmer Vernooij)

* Updated the bundled ``ConfigObj`` library to 4.6.0 (Matt Nordhoff)

Testing
*******

* ``bzr selftest`` will now fail if lock/unlock are not correctly balanced in
  tests. Using ``-Dlock`` will turn the related failures into warnings.
  (Vincent Ladeuil, Robert Collins)

bzr 1.14
###########
:Codename: brisbane-core
:1.14rc1: 2009-04-06
:1.14rc2: 2009-04-19
:1.14: 2009-04-28
:1.14.1: 2009-05-01

New formats 1.14 and 1.14-rich-root supporting End-Of-Line (EOL) conversions,
keyword templating (via the bzr-keywords plugin) and generic content filtering.
End-of-line conversion is now supported for formats supporting content
filtering.

Changes from 1.14final to 1.14.1
********************************

* Change api_minimum_version back to api_minimum_version = (1, 13, 0)

Changes from 1.14rc2 to 1.14final
*********************************

* Fix a bug in the pure-python ``GroupCompress`` code when handling copies
  longer than 64KiB. (John Arbash Meinel, #364900)

Changes from 1.14rc1 to 1.14rc2
*******************************

* Fix for bug 358037 Revision not in
  bzrlib.groupcompress.GroupCompressVersionedFiles (Brian de Alwis, 
  John A Meinel)

* Fix for bug 354036 ErrorFromSmartServer - AbsentContentFactory object has no
  attribute 'get_bytes_as' exception while pulling from Launchpad 
  (Jean-Francois Roy, Andrew Bennetts, Robert Collins)

* Fix for bug 355280 eol content filters are never loaded and thus never
  applied (Brian de Alwis, Ian Clatworthy)
 
* bzr.dev -r4280  Change _fetch_uses_deltas = False for CHK repos until we can
  write a better fix. (John Arbash Meinel, Robert Collins)

* Fix for bug 361574 uncommit recommends undefined --levels and -n options
  (Marius Kruger, Ian Clatworthy)

* bzr.dev r4289 as cherrypicked at lp:~spiv/bzr/stacking-cherrypick-1.14 
  (Andrew Bennetts, Robert Collins)

Compatibility Breaks
********************

* A previously disabled code path to accelerate getting configuration
  settings from a smart server has been reinstated. We think this *may*
  cause a incompatibility with servers older than bzr 0.15. We intend
  to issue a point release to address this if it turns out to be a
  problem. (Robert Collins, Andrew Bennetts)

* bzr no longer autodetects nested trees as 'tree-references'.  They
  must now be explicitly added tree references.  At the commandline, use
  join --reference instead of add.  (Aaron Bentley)

* The ``--long`` log format (the default) no longer shows merged
  revisions implicitly, making it consistent with the ``short`` and
  ``line`` log formats.  To see merged revisions for just a given
  revision, use ``bzr log -n0 -rX``. To see every merged revision,
  use ``bzr log -n0``.  (Ian Clatworthy)

New Features
************

* New formats ``1.14`` and ``1.14-rich-root`` supporting End-Of-Line
  (EOL) conversions, keyword templating (via the bzr-keywords plugin)
  and generic content filtering. These formats replace the experimental
  ``development-wt5`` and ``development-wt5-rich-root`` formats
  respectively, but have support for filtered views disabled.
  (Ian Clatworthy)

* New ``mv --auto`` option recognizes renames after they occur.
  (Aaron Bentley)

* ``bzr`` can now get passwords from stdin without requiring a controlling
  terminal (i.e. by redirecting stdin). (Vincent Ladeuil)

* ``bzr log`` now supports filtering of multiple files and directories
  and will show changes that touch any of them. Furthermore,
  directory filtering now shows the changes to any children of that
  directory, not just the directory object itself.
  (Ian Clatworthy, #97715)

* ``bzr shelve`` can now apply changes without storing anything on the
  shelf, via the new --destroy option.  (Aaron Bentley)

* ``bzr send`` now accepts --body to specify an initial message body.
  (Aaron bentley)

* ``bzr xxx --usage`` where xxx is a command now shows a usage
  message and the options without the descriptive help sections
  (like Description and Examples). A message is also given
  explaining how to see the complete help, i.e. ``bzr help xxx``.
  (Ian Clatworthy)

* Content filters can now be used to provide custom conversion
  between the canonical format of content (i.e. as stored) and
  the convenience format of content (i.e. as created in working
  trees). See ``bzr help content-filters`` for further details.
  (Ian Clatworthy, Alexander Belchenko)

* End-of-line conversion is now supported for formats supporting
  content filtering. See ``bzr help eol`` for details.
  (Ian Clatworthy)

* Newly-blessed `join` command allows combining two trees into one.
  (Aaron Bentley)

Improvements
************

* A new format name alias ``default-rich-root`` has been added and
  points at the closest relative of the default format that supports 
  rich roots. (Jelmer Vernooij, #338061)

* Branching from a stacked branch using ``bzr*://`` will now stream
  the data when the target repository does not need topological
  ordering, reducing round trips and network overhead. This uses the
  existing smart server methods added in 1.13, so will work on any
  1.13 or newer server. (Robert Collins, Andrew Bennetts)

* ``bzr cat`` and ``bzr export`` now supports a ``--filters`` option
  that displays/saves the content after content filters are applied.
  (Ian Clatworthy)

* ``bzr ignore`` gives a more informative message when existing
  version controlled files match the ignore pattern. (Neil
  Martinsen-Burrell, #248895)

* ``bzr log`` now has ``--include-merges`` as an alias for ``--levels 0``.
  (Ian Clatworthy)

* ``bzr send`` is faster on repositories with deep histories.
  (Ian Clatworthy)

* IPv6 literals are accepted in URLs.
  (stlman, Martin Pool, Jelmer Vernooij, #165014)

* Progress bars now show the rate of network activity for
  ``bzr+ssh://`` and ``bzr://`` connections.  (Andrew Bennetts)

* Prompt for user names if they are not in the configuration. 
  (Jelmer Vernooij, #256612)

* Pushing to a stacked pack-format branch on a 1.12 or older smart server
  now takes many less round trips.  (Andrew Bennetts, Robert Collins,
  #294479)
  
* Streaming push can be done to older repository formats.  This is
  implemented using a new ``Repository.insert_stream_locked`` RPC.
  (Andrew Bennetts, Robert Collins)

* The "ignoring files outside view: .." message has been re-worded
  to "Ignoring files outside view. View is .." to reduce confusion
  about what was being considered and what was being ignored.
  (Ian Clatworthy)

* The ``long`` log formatter now shows [merge] indicators. If
  only one level of revisions is displayed and merges are found,
  the ``long`` and ``short`` log formatters now tell the user
  how to see the hidden merged revisions.  (Ian Clatworthy)

* The ``brisbane-core`` project has delivered its beta format
  ``development6-rich-root``. This format is suitable for judicious
  testing by early adopters. In particular if you are benchmarking bzr
  performance please be sure to test using this format. At this stage
  more information is best obtained by contacting the Bazaar mailing list
  or IRC channel if you are interested in using this format. We will make
  end user documentation available closer to blessing the format as
  production ready. (Robert Collins, John Arbash Meinel, Ian Clatworthy,
  Vincent Ladeuil, Andrew Bennetts, Martin Pool)

* Tildes are no longer escaped. No more %7Euser/project/branch!
  (Jonathan Lange)

Bug Fixes
*********

* Pushing a new stacked branch will also push the parent inventories for
  revisions at the stacking boundary.  This makes sure that the stacked
  branch has enough data to calculate inventory deltas for all of its
  revisions (without requiring the fallback branch).  This avoids
  "'AbsentContentFactory' object has no attribute 'get_bytes_as'" errors
  when fetching the stacked branch from a 1.13 (or later) smart server.
  This partially fixes #354036.  (Andrew Bennetts, Robert Collins)

* End-Of-Line content filters are now loaded correctly.
  (Ian Clatworthy, Brian de Alwis, #355280)

* Authentication plugins now receive all the parameters from the request
  itself (aka host, port, realm, path, etc). Previously, only the 
  authentication section name, username and encoded password were 
  provided. (Jean-Francois Roy)

* bzr gives a better message if an invalid regexp is passed to ``bzr log
  -m``.  (Anne Mohsen, Martin Pool)

* ``bzr split`` now says "See also: join" (Aaron Bentley, #335015)

* ``bzr version-info`` now works in empty branches. (Jelmer Vernooij,
  #313028)

* Fix "is not a stackable format" error when pushing a
  stackable-format branch with an unstackable-format repository to a
  destination with a default stacking policy.  (Andrew Bennetts)

* Fixed incorrect "Source format does not support stacking" warning
  when pushing to a smart server.  (Andrew Bennetts, #334114)

* Fix 'make check-dist-tarball' failure by converting paths to unicode when
  needed. (Vincent Ladeuil, #355454)

* Fixed "Specified file 'x/y/z' is outside current view: " occurring
  on ``bzr add x/y/z`` in formats supporting views when no view is
  defined.  (Ian Clatworthy, #344708)

* It is no longer possible to fetch between repositories while the
  target repository is in a write group. This prevents race conditions
  that prevent the use of RPC's to perform fetch, and thus allows
  optimising more operations. (Robert Collins, Andrew Bennetts)

* ``merge --force`` works again. (Robert Collins, #342105)

* No more warnings are issued about ``sha`` being deprecated under python-2.6.
  (Vincent Ladeuil, #346593)

* Pushing a new branch to a server that has a stacking policy will now
  upgrade from the local branch format when the stacking policy points at
  a branch which is itself stackable, because we know the client can read
  both branches, we know that the trunk for the project can be read too,
  so the upgrade will not inconvenience users. (Robert Collins, #345169)

* Pushing a new stacked branch will also push the parent inventories for
  revisions at the stacking boundary.  This makes sure that the stacked
  branch has enough data to calculate inventory deltas for all of its
  revisions (without requiring the fallback branch).  This avoids
  "'AbsentContentFactory' object has no attribute 'get_bytes_as'" errors
  when fetching the stacked branch from a 1.13 (or later) smart server.
  This partially fixes #354036.  (Andrew Bennetts, Robert Collins)

* The full test suite is passing again on OSX. Several minor issues (mostly
  test related) have been fixed. (Vincent Ladeuil, #355273).

* The GNU Changelog formatter is slightly improved in the case where
  the delta is empty, and now correctly claims not to support tags.
  (Andrea Bolognani)

* Shelve can now shelve changes to a symlink target.
  (James Westby, #341558)

* The help for the ``info`` command has been corrected.
  (Ian Clatworthy, #351931)

* Upgrade will now use a sensible default format if the source repository
  uses rich roots.  (Jelmer Vernooij, #252908)

Documentation
*************

* Expanded the index of the developer documentation. (Eric Siegerman)

* New topic `bzr help debug-flags`.  (Martin Pool)

* The generated manpage now explicitly lists aliases as commands.
  (James Westby, #336998)

API Changes
***********

* APIs deprecated in 1.6 and previous versions of bzr are now removed.
  (Martin Pool)

* ``CommitReporter`` is no longer called with ``unchanged`` status during
  commit - this was a full-tree overhead that bzr no longer performs.
  (Robert Collins)

* New abstract ``UIFactory`` method ``get_username`` which will be called to 
  obtain the username to use when connecting to remote machines. 
  (Jelmer Vernooij)

* New API ``Inventory.filter()`` added that filters an inventory by
  a set of file-ids so that only those fileids, their parents and
  their children are included.  (Ian Clatworthy)

* New sort order for ``get_record_stream`` ``groupcompress`` which
  sorts optimally for use with groupcompress compressors. (John Arbash
  Meinel, Robert Collins)

* Repository APIs ``get_deltas_for_revisions()`` and
  ``get_revision_delta()`` now support an optional ``specific_fileids``
  parameter. If provided, the deltas are filtered so that only those
  file-ids, their parents and their children are included.
  (Ian Clatworthy)

* The ``get_credentials`` and ``set_credentials`` methods of 
  ``AuthenticationConfig`` now accept an optional realm argument.
  (Jean-Francois Roy)

* The ``pb`` argument to ``fetch()`` is deprecated.
  (Martin Pool)

* The ``Serializer`` class and the serializer ``format registry`` have moved
  from ``bzrlib.xml_serializer`` to ``bzrlib.serializer``. (Jelmer Vernooij)

* The smart server jail now hooks into BzrDir.open to prevent any BzrDir
  that is not inside the backing transport from being opened.  See the
  module documentation for ``bzrlib.smart.request`` for details.
  (Andrew Bennetts, Robert Collins)

* ``Tree.get_symlink_target`` now always returns a unicode string result
  or None. Previously it would return the bytes from reading the link
  which could be in any arbitrary encoding. (Robert Collins)

Testing
*******

* ``bzrlib.tests.TestCase`` now fails the test if its own ``setUp``
  and ``tearDown`` weren't called.  This catches faulty tests that
  forget to upcall when overriding ``setUp`` and ``tearDown``.  Those
  faulty tests were not properly isolated.
  (Andrew Bennetts, Robert Collins)

* Fix test_msgeditor.MsgEditorTest test isolation.
  (Vincent Ladeuil, #347130)

* ``medusa`` is not used anymore as an FTP test server starting with
  python2.6. A new FTP test server based on ``pyftplib`` can be used
  instead. This new server is a soft dependency as medusa which is still
  preferred if both are available (modulo python version).
  (Vincent Ladeuil)

Internals
*********

* Added ``chk_map`` for fast, trie-based storage of tuple to string maps.
  (Robert Collins, John Arbash Meinel, Vincent Ladeuil)

* Added ``bzrlib.chk_map`` for fast, trie-based storage of tuple to string
  maps.  (Robert Collins, John Arbash Meinel, Vincent Ladeuil)

* Added ``bzrlib.inventory_delta`` module.  This will be used for
  serializing and deserializing inventory deltas for more efficient
  streaming on the the network.  (Robert Collins, Andrew Bennetts)

* ``Branch._get_config`` has been added, which splits out access to the
  specific config file from the branch. This is used to let RemoteBranch
  avoid constructing real branch objects to access configuration settings.
  (Robert Collins, Andrew Bennetts)

* ``Branch`` now implements ``set_stacked_on_url`` in the base class as
  the implementation is generic and should impact foreign formats. This
  helps performance for ``RemoteBranch`` push operations to new stacked
  branches. (Robert Collins, Andrew Bennetts)

* ``BtreeIndex._spill_mem_keys_to_disk()`` now generates disk index with
  optmizations turned off. This only has effect when processing > 100,000
  keys during something like ``bzr pack``. (John Arbash Meinel)

* ``bzr selftest`` now accepts ``--subunit`` to run in subunit output
  mode. Requires ``lp:subunit`` installed to work, but is not a hard
  dependency. (Robert Collins)

* ``BzrDir.open_branch`` now takes an optional ``ignore_fallbacks``
  parameter for controlling opening of stacked branches.
  (Andrew Bennetts, Robert Collins)
  
* ``CommitBuilder`` has a new method, ``record_iter_changes`` which works
  in terms of an iter_changes iterator rather than full tree scanning.
  (Robert Collins)

* ``DirState`` can now be passed a custom ``SHA1Provider`` object
  enabling it to store the SHA1 and stat of the canonical (post
  content filtered) form. (Ian Clatworthy)

* New ``assertLength`` method based on one Martin has squirreled away
  somewhere. (Robert Collins, Martin Pool)

* New hook ``BzrDir.pre_open`` which runs before opening ``BzrDir``
  objects, allowing better enforcement of the smart server jail when
  dealing with stacked branches. (Robert Collins, Andrew Bennetts)

* New hook ``RioVersionInfoBuilder.revision``, allowing extra entries 
  to be added to the stanza that is printed for a particular revision.
  (Jelmer Vernooij)

* New repository method ``refresh_data`` to cause any repository to
  make visible data inserted into the repository by a smart server
  fetch operation. (Robert Collins, Andrew Bennetts)

* ``register_filter_stack_map`` now takes an optional fallback parameter,
  a callable to invoke if a preference has a value not in the map
  of filter stacks. This enhancement allows, for example,  bzr-svn to
  handle existing svn properties that define a list of keywords to be
  expanded.  (Ian Clatworthy)

* ``RemoteBranchConfig`` will use a new verb ``Branch.set_config_option``
  to write config settings to smart servers that support this, saving
  5 round trips on the stacked streaming acceptance test.
  (Robert Collins, Andrew Bennetts)

* ``RemoteBranch`` now provides ``_get_config`` for access to just the
  branch specific configuration from a remote server, which uses the 
  already existing ``Branch.get_config_file`` smart verb.
  (Robert Collins, Andrew Bennetts)

* ``RemoteRepository`` will now negatively cache missing revisions during
  ``get_parent_map`` while read-locked. Write-locks are unaffected.
  (Robert Collins, Andrew Bennetts)

* Removed ``InterRemoteToOther``, ``InterOtherToRemote`` and
  ``InterPackToRemotePack`` classes, as they are now unnecessary.
  (Andrew Bennetts)

* ``RepositoryFormat`` as a new attribute ``fast_deltas`` to indicate
  whether the repository can efficiently generate deltas between trees
  regardless of tree size. (Robert Collins)

* ``Repository.iter_files_bytes()`` now properly returns an "iterable of
  byte strings" (aka 'chunked') for the content. It previously was
  returning a plain string, which worked, but performed very poorly when
  building a working tree (file.writelines(str) is very inefficient). This
  can have a large effect on ``bzr checkout`` times. (John Arbash Meinel)

* selftest now supports a --parallel option, with values of 'fork' or
  'subprocess' to run the test suite in parallel. Currently only linux
  machine work, other platforms need patches submitted. (Robert Collins,
  Vincent Ladeuil)

* ``tests.run_suite`` has a new parameter ``suite_decorators``, a list of 
  callables to use to decorate the test suite. Such decorators can add or
  remove tests, or even remote the test suite to another machine if
  desired. (Robert Collins)

* The smart server verb ``Repository.get_parent_map`` can now include
  information about ghosts when the special revision ``include-missing:``
  is in the requested parents map list. With this flag, ghosts are
  included as ``missing:REVISION_ID``. (Robert Collins, Andrew Bennetts)

* ``_walk_to_common_revisions`` will now batch up at least 50
  revisions before calling ``get_parent_map`` on the target,
  regardless of ``InterRepository``.
  (Andrew Bennetts, Robert Collins)

bzr 1.13
########

:Codename: paraskavedekatriaphobia
:1.13: 2009-03-14
:1.13rc1: 2009-03-10
:1.13.1: 2009-03-23
:1.13.2: 2009-04-27

GNU Changelog output can now be produced by ``bzr log --gnu-changelog``.  Debug
flags can now be set in ``~/.bazaar/bazaar.conf``.  Lightweight checkouts and
stacked branches should both be much faster over remote connections.  

Changes From 1.13.1 to 1.13.2
*****************************

A regression was found in the 1.13.1 release. When bzr 1.13.1 and earlier push
a stacked branch they do not take care to push all the parent inventories for
the transferred revisions. This means that a smart server serving that branch
often cannot calculate inventory deltas for the branch (because smart server
does not/cannot open fallback repositories). Prior to 1.13 the server did not
have a verb to stream revisions out of a repository, so that's why this bug has
appeared now.

Bug Fixes
*********

* Fix for bug 354036 ErrorFromSmartServer - AbsentContentFactory object has no
  attribute 'get_bytes_as' exception while pulling from Launchpad 
  (Jean-Francois Roy, Andrew Bennetts, Robert Collins)

Changes From 1.13final to 1.13.1
********************************

A couple regessions where found in the 1.13 release. The pyrex-generated C
extensions are missing from the .tar.gz and .zip files.  Documentation on how
to generate GNU ChangeLogs is wrong.

Bug Fixes
*********

* Change ``./bzr``'s ``_script_version`` to match ./bzrlib/__init__.py
  version_info. (Bob Tanner, Martin Pool, #345232)

* Distribution archives for 1.13 do not contain generated C extension modules
  (Jean-Francois Roy, Bob Tanner, #344465)

* GNU ChangeLog output can now be produced by bzr log --format gnu-changelog is
  incorrect (Deejay, Bob Tanner, Martin Pool, Robert Collins, #343928)

* ``merge --force`` works again. (Robert Collins, #342105)

Changes From 1.13rc1 to 1.13final
*********************************

* Fix "is not a stackable format" error when pushing a
  stackable-format branch with an unstackable-format repository to a
  destination with a default stacking policy.  (Andrew Bennetts)

* Progress bars now show the rate of network activity for
  ``bzr+ssh://`` and ``bzr://`` connections.  (Andrew Bennetts)

Compatibility Breaks
********************

* ``bzr log --line`` now indicates which revisions are merges with
  `[merge]` after the date.  Scripts which parse the output of this
  command may need to be adjusted.
  (Neil Martinsen-Burrell)

New Features
************

* ``bzr reconfigure`` now supports --with-trees and --with-no-trees
  options to change the default tree-creation policy of shared
  repositories.  (Matthew Fuller, Marius Kruger, #145033)

* Debug flags can now be set in ``~/.bazaar/bazaar.conf``.
  (Martin Pool)

* Filtered views provide a mask over the tree so that users can focus
  on a subset of a tree when doing their work. See ``Filtered views``
  in chapter 7 of the User Guide and ``bzr help view`` for details.
  (Ian Clatworthy)

* GNU Changelog output can now be produced by ``bzr log --gnu-changelog``.
  (Andrea Bolognani, Martin Pool)

* The ``-Dmemory`` flag now gives memory information on Windows.
  (John Arbash Meinel)

* Multiple authors for a commit can now be recorded by using the "--author"
  option multiple times. (James Westby, #185772)

* New clean-tree command, from bzrtools.  (Aaron Bentley, Jelmer Vernoij)

* New command ``bzr launchpad-open`` opens a Launchpad web page for that
  branch in your web browser, as long as the branch is on Launchpad at all.
  (Jonathan Lange)

* New API for getting bugs fixed by a revision: Revision.iter_bugs().
  (Jonathan Lange)

Improvements
************

* All bzr ``Hooks`` classes are now registered in
  ``bzrlib.hooks.known_hooks``. This removes the separate list from
  ``bzrlib.tests`` and ensures that all hooks registered there are
  correctly isolated by the test suite (previously
  ``MutableTreeHooks`` were not being isolated correctly). Further, 
  documentation for hooks is now dynamically generated from the
  present HookPoints. ``bzr hooks`` will now also report on all the
  hooks present in the ``bzrlib.hooks.known_hooks`` registry.
  (Robert Collins)

* ``bzr add`` no longer prints ``add completed`` on success. Failure
  still prints an error message. (Robert Collins)

* ``bzr branch`` now has a ``--no-tree`` option which turns off the
  generation of a working tree in the new branch.
  (Daniel Watkins, John Klinger, #273993)

* Bazaar will now point out ``bzr+ssh://`` to the user when they 
  use ssh://. (Jelmer Vernooij, #330535)

* ``bzr -v info`` now omits the number of committers branch statistic,
  making it many times faster for large projects. To include that
  statistic in the output, use ``bzr -vv info``.
  (Ian Clatworthy)

* ``bzr push`` to a ``bzr`` url (``bzr://``, ``bzr+ssh://`` etc) will
  stream if the server is version 1.13 or greater, reducing roundtrips
  significantly. (Andrew Bennetts, Robert Collins)

* Lightweight Checkouts and Stacked Branches should both be much
  faster over remote connections. Building the working tree now
  batches up requests into approx 5MB requests, rather than a separate
  request for each file. (John Arbash Meinel)

* Support for GSSAPI authentication when using HTTP or HTTPS. 
  (Jelmer Vernooij)

* The ``bzr shelve`` prompt now includes a '?' help option to explain the
  short options better. (Daniel Watkins, #327429)

* ``bzr lp-open`` now falls back to the push location if it cannot find a
  public location. (Jonathan Lange, #332372)

* ``bzr lp-open`` will try to find the Launchpad URL for the location
  passed on the command line. This makes ``bzr lp-open lp:foo`` work as
  expected. (Jonathan Lange, #332705)

* ``bzr send`` now supports MH-E via ``emacsclient``. (Eric Gillespie)

Bug Fixes
*********

* Allows ``bzr log <FILE>`` to be called in an empty branch without
  backtracing. (Vincent Ladeuil, #346431)

* Bazaar now gives a better message including the filename if it's
  unable to read a file in the working directory, for example because
  of a permission error.  (Martin Pool, #338653)

* ``bzr cat -r<old> <path>`` doesn't traceback anymore when <path> has a
  file id in the working tree different from the one in revision <old>.
  (Vincent Ladeuil, #341517, #253806)

* ``bzr send`` help is more specific about how to apply merge
  directives.  (Neil Martinsen-Burrell, #253470)

* ``bzr missing`` now uses ``Repository.get_revision_delta()`` rather
  than fetching trees and determining a delta itself. (Jelmer
  Vernooij, #315048)

* ``bzr push`` to a smart server no longer causes "Revision
  {set([('null:',)])} not present ..." errors when the branch has
  multiple root revisions. (Andrew Bennetts, #317654)

* ``bzr shelve`` now properly handle patches with no terminating newline.
  (Benoît PIERRE, #303569)

* ``bzr unshelve`` gives a more palatable error if passed a non-integer
  shelf id. (Daniel Watkins)

* Export now handles files that are not present in the tree.
  (James Westby, #174539)

* Fixed incorrect "Source format does not support stacking" warning
  when pushing to a smart server.  (Andrew Bennetts, #334114)
  
* Fixed "sprout() got an unexpected keyword argument 'source_branch'"
  error branching from old repositories.
  (Martin Pool, #321695)

* Make ``bzr push --quiet <non-local location>`` less chatty.
  (Kent Gibson, #221461)

* Many Branch hooks would not fire with ``bzr://`` and ``bzr+ssh://``
  branches, and this was not noticed due to a bug in the test logic
  for branches. This is now fixed and a test added to prevent it
  reoccuring. (Robert Collins, Andrew Bennetts)

* Restore the progress bar on Windows. We were disabling it when TERM
  wasn't set, but Windows doesn't set TERM. (Alexander Belchenko,
  #334808)

* ``setup.py build_ext`` now gives a proper error when an extension
  fails to build. (John Arbash Meinel)

* Symlinks to non ascii file names are now supported.
  (Robert Collins, Vincent Ladeuil, #339055, #272444)    

* Under rare circumstances (aka nobody reported a bug about it), the ftp
  transport could revert to ascii mode. It now stays in binary mode except
  when needed.  (Vincent Ladeuil)

* Unshelve does not generate warnings about progress bars.
  (Aaron Bentley, #328148)

* shelve cleans up properly when unversioned files are specified.
  (Benoît Pierre, Aaron Bentley)

Documentation
*************

* Added ``Organizing your workspace`` to the User Guide appendices,
  summarizing some common ways of organizing trees, branches and
  repositories and the processes/workflows implied/enabled by each.
  (Ian Clatworthy)

* Hooks can now be self documenting. ``bzrlib.hooks.Hooks.create_hook``
  is the entry point for this feature. (Robert Collins)

* The documentation for ``shelve`` and ``unshelve`` has been clarified.
  (Daniel Watkins, #327421, #327425)

API Changes
***********

* ``bzr selftest`` now fails if the bazaar sources contain trailing
  whitespace, non-unix style line endings and files not ending in a
  newline. About 372 files and 3243 lines with trailing whitespace was
  updated to comply with this. The code already complied with the other
  criteria, but now it is enforced. (Marius Kruger)

* ``bzrlib.branch.PushResult`` was renamed to 
  ``bzrlib.branch.BranchPushResult``. (Jelmer Vernooij)

* ``Branch.fetch`` and ``Repository.fetch`` now return None rather
  than a count of copied revisions and failed revisions. A while back
  we stopped ever reporting failed revisions because we started
  erroring instead, and the copied revisions count is not used in the
  UI at all - indeed it only reflects the repository status not
  changes to the branch itself. (Robert Collins)

* ``Inventory.apply_delta`` now raises an AssertionError if a file-id
  appears multiple times within the delta. (Ian Clatworthy)

* MutableTree.commit now favours the "authors" argument, with the old
  "author" argument being deprecated.

* Remove deprecated EmptyTree.  (Martin Pool)

* ``Repository.fetch`` now accepts an optional ``fetch_spec``
  parameter.  A ``SearchResult`` or ``MiniSearchResult`` may be passed
  to ``fetch_spec`` instead of a ``last_revision`` to specify exactly
  which revisions to fetch. (Andrew Bennetts)

* ``RepositoryAcquisitionPolicy.acquire_repository`` now returns a
  tuple of ``(repository, is_new_flag)``, rather than just the
  repository.  (Andrew Bennetts)

* Revision.get_apparent_author() is now deprecated, replaced by
  Revision.get_apparent_authors(), which returns a list. The former
  now returns the first item that would be returned from the second.

* The ``BranchBuilder`` test helper now accepts a ``timestamp``
  parameter to ``build_commit`` and ``build_snapshot``.  (Martin Pool)

* The ``_fetch_*`` attributes on ``Repository`` are now on
  ``RepositoryFormat``, more accurately reflecting their intent (they
  describe a disk format capability, not state of a particular
  repository of that format). (Robert Collins)

Internals
*********

* Branching from a non-stacked branch on a smart protocol is now
  free of virtual file system methods.
  (Robert Collins, Andrew Bennetts)

* Branch and Repository creation on a bzr+ssh://server are now done
  via RPC calls rather than VFS calls, reducing round trips for
  pushing new branches substantially. (Robert Collins)

* ``Branch.clone`` now takes the ``repository_policy`` formerly used
  inside ``BzrDir.clone_on_transport``, allowing stacking to be
  configured before the branch tags and revision tip are set. This
  fixes a race condition cloning stacked branches that would cause
  plugins to have hooks called on non-stacked instances.
  (Robert Collins, #334187)

* ``BzrDir.cloning_metadir`` now has a RPC call. (Robert Collins)

* ``BzrDirFormat.__str__`` now uses the human readable description
  rather than the sometimes-absent disk label. (Robert Collins)

* ``bzrlib.fetch`` is now composed of a sender and a sink component
  allowing for decoupling over a network connection. Fetching from
  or into a RemoteRepository with a 1.13 server will use this to
  stream the operation.
  (Andrew Bennetts, Robert Collins)

* ``bzrlib.tests.run_suite`` accepts a runner_class parameter
  supporting the use of different runners. (Robert Collins)

* Change how file_ids and revision_ids are interned as part of
  inventory deserialization. Now we use the real ``intern()``, rather
  than our own workaround that would also cache a Unicode copy of the
  string, and never emptied the cache. This should slightly reduce
  memory consumption. (John Arbash Meinel)

* New branch method ``create_clone_on_transport`` that returns a
  branch object. (Robert Collins)

* New hook Commands['extend_command'] to allow plugins to access a
  command object before the command is run (or help generated from
  it), without overriding the command. (Robert Collins)

* New version of the ``BzrDir.find_repository`` verb supporting
  ``_network_name`` to support removing more _ensure_real calls.
  (Robert Collins)

* ``RemoteBranchFormat`` no longer claims to have a disk format string.
  (Robert Collins)

* ``Repository`` objects now have ``suspend_write_group`` and
  ``resume_write_group`` methods.  These are currently only useful
  with pack repositories. (Andrew Bennetts, Robert Collins)

* ``BzrDirFormat``, ``BranchFormat`` and ``RepositoryFormat`` objects
  now have a ``network_name`` for passing the format across RPC calls.
  (Robert Collins, Andrew Bennetts)

* ``RepositoryFormat`` objects now all have a new attribute
  ``_serializer`` used by fetch when reserialising is required.
  (Robert Collins, Andrew Bennetts)

* Some methods have been pulled up from ``BzrBranch`` to ``Branch``
  to aid branch types that are not bzr branch objects (like
  RemoteBranch). (Robert Collins, Andrew Bennetts)

* Test adaptation has been made consistent throughout the built in
  tests. ``TestScenarioApplier``, ``multiply_tests_from_modules``,
  ``adapt_tests``, ``adapt_modules`` have all been deleted. Please
  use ``multiply_tests``, or for lower level needs ``apply_scenarios``
  and ``apply_scenario``. (Robert Collins)

* ``TestSkipped`` is now detected by TestCase and passed to the
  ``TestResult`` by calling ``addSkip``. For older TestResult objects,
  where ``addSkip`` is not available, ``addError`` is still called.
  This permits test filtering in subunit to strip out skipped tests
  resulting in a faster fix-shrink-list-run cycle. This is compatible
  with the testtools protocol for skips. (Robert Collins)

* The ``_index`` of ``KnitVersionedFiles`` now supports the ability
  to scan an underlying index that is going to be incorporated into
  the ``KnitVersionedFiles`` object, to determine if it has missing
  delta references. The method is ``scan_unvalidated_index``.
  (Andrew Bennetts, Robert Collins)

* There is a RemoteSink object which handles pushing to smart servers.
  (Andrew Bennetts, Robert Collins)

* ``TransportTraceDecorator`` now logs ``put_bytes_non_atomic`` and
  ``rmdir`` calls. (Robert Collins)

* ``VersionedFiles`` record adapters have had their signature change
  from ``(record, record.get_bytes_as(record.storage_kind))`` to
  ``(record)`` reducing excess duplication and allowing adapters
  to access private data in record to obtain content more
  efficiently. (Robert Collins)

* We no longer probe to see if we should create a working tree during
  clone if we cannot get a local_abspath for the new bzrdir.
  (Robert Collins)


bzr 1.12
########

:Codename: 1234567890
:1.12: 2009-02-13
:1.12rc1: 2009-02-10

This release of Bazaar contains many improvements to the speed,
documentation and functionality of ``bzr log`` and the display of logged
revisions by ``bzr status``.  bzr now also gives a better indication of
progress, both in the way operations are drawn onto a text terminal, and
by showing the rate of network IO.

Changes from RC1 to Final
*************************

* ``bzr init --development-wt5[-rich-root]`` would fail because of
  circular import errors. (John Arbash Meinel, #328135)

* Expanded the help for log and added a new help topic called
  ``log-formats``.  (Ian Clatworthy)

Compatibility Breaks
********************

* By default, ``bzr status`` after a merge now shows just the pending
  merge tip revisions. This improves the signal-to-noise ratio after
  merging from trunk and completes much faster. To see all merged
  revisions, use the new ``-v`` flag.  (Ian Clatworthy)

* ``bzr log --line`` now shows any tags after the date and before
  the commit message. If you have scripts which parse the output
  from this command, you may need to adjust them accordingly.
  (Ian Clatworthy)

* ``bzr log --short`` now shows any additional revision properties
  after the date and before the commit message.  Scripts that parse 
  output of the log command in this situation may need to adjust.
  (Neil Martinsen-Burrell)

* The experimental formats ``1.12-preview`` and ``1.12-preview-rich-root``
  have been renamed ``development-wt5`` and ``development-wt5-rich-root``
  respectively, given they are not ready for release in 1.12.
  (Ian Clatworthy)

* ``read_bundle_from_url`` has been deprecated. (Vincent Ladeuil)

New Features
************

* Add support for filtering ``bzr missing`` on revisions.  Remote revisions
  can be filtered using ``bzr missing -r -20..-10`` and local revisions can
  be filtered using ``bzr missing --my-revision -20..-10``.
  (Marius Kruger)

* ``bzr log -p`` displays the patch diff for each revision.
  When logging a file, the diff only includes changes to that file.
  (Ian Clatworthy, #202331, #227335)

* ``bzr log`` supports a new option called ``-n N`` or ``--level N``.
  A value of 0 (zero) means "show all nested merge revisions" while
  a value of 1 (one) means "show just the top level". Values above
  1 can be used to see a limited amount of nesting. That can be
  useful for seeing the level or two below PQM submits for example.
  To force the ``--short`` and ``--line`` formats to display all nested
  merge revisions just like ``--long`` does by default, use a command
  like ``bzr log --short -n0``. To display just the mainline using
  ``--long`` format, ``bzr log --long -n1``.
  (Ian Clatworthy)

Improvements
************

* ``bzr add`` more clearly communicates success vs failure.
  (Daniel Watkins)

* ``bzr init`` will now print a little less verbose output.
  (Marius Kruger)

* ``bzr log`` is now much faster in many use cases, particularly
  at incrementally displaying results and filtering by a
  revision range. (Ian Clatworthy)

* ``bzr log --short`` and ``bzr log --line`` now show tags, if any,
  for each revision. The tags are shown comma-separated inside
  ``{}``. For short format, the tags appear at the end of line
  before the optional ``[merge]`` indicator. For line format,
  the tags appear after the date. (Ian Clatworthy)

* Progress bars now show the rate of activity for some sftp 
  operations, and they are drawn different.  (Martin Pool, #172741)

* Progress bars now show the rate of activity for urllib and pycurl based
  http client implementations. The operations are tracked at the socket
  level for better precision.
  (Vincent Ladeuil)

* Rule-based preferences can now accept multiple patterns for a set of
  rules.  (Marius Kruger)

* The ``ancestor:`` revision spec will now default to referring to the
  parent of the branch if no other location is given.
  (Daniel Watkins, #198417)

* The debugger started as a result of setting ``$BZR_PDB`` works
  around a bug in ``pdb``, http://bugs.python.org/issue4150.  The bug
  can cause truncated tracebacks in Python versions before 2.6.
  (Andrew Bennetts)

* VirtualVersionedFiles now implements
  ``iter_lines_added_or_present_in_keys``. This allows the creation of 
  new branches based on stacked bzr-svn branches. (#311997)

Bug Fixes
*********

* ``bzr annotate --show-ids`` doesn't give a backtrace on empty files
  anymore.
  (Anne Mohsen, Vincent Ladeuil, #314525)

* ``bzr log FILE`` now correctly shows mainline revisions merging
  a change to FILE when the ``--short`` and ``--line`` log formats
  are used. (Ian Clatworthy, #317417)

* ``bzr log -rX..Y FILE`` now shows the history of FILE provided
  it existed in Y or X, even if the file has since been deleted or
  renamed. If no range is given, the current/basis tree and
  initial tree are searched in that order. More generally, log
  now interprets filenames in their historical context.
  (Ian Clatworthy, #175520)

* ``bzr status`` now reports nonexistent files and continues, then
  errors (with code 3) at the end.  (Karl Fogel, #306394)

* Don't require the present compression base in knits to be the same
  when adding records in knits. (Jelmer Vernooij, #307394)

* Fix a problem with CIFS client/server lag on Windows colliding with
  an invariant-per-process algorithm for generating AtomicFile names
  (Adrian Wilkins, #304023)

* Many socket operations now handle EINTR by retrying the operation.
  Previously EINTR was treated as an unrecoverable failure.  There is
  a new ``until_no_eintr`` helper function in ``bzrlib.osutils``.
  (Andrew Bennetts)

* Support symlinks with non-ascii characters in the symlink filename.
  (Jelmer Vernooij, #319323)

* There was a bug in how we handled resolving when a file is deleted
  in one branch, and modified in the other. If there was a criss-cross
  merge, we would cause the deletion to conflict a second time.
  (Vincent Ladeuil, John Arbash Meinel)

* There was another bug in how we chose the correct intermediate LCA in
  criss-cross merges leading to several kind of changes be incorrectly
  handled.
  (John Arbash Meinel, Vincent Ladeuil)

* Unshelve now handles deleted paths without crashing. (Robert Collins)

Documentation
*************

* Improved plugin developer documentation.  (Martin Pool)

API Changes
***********

* ``ProgressBarStack`` is deprecated; instead use
  ``ui_factory.nested_progress_bar`` to create new progress bars.
  (Martin Pool)

* ForeignVcsMapping() now requires a ForeignVcs object as first
  argument. (Jelmer Vernooij)

* ForeignVcsMapping.show_foreign_revid() has been moved to
  ForeignVcs. (Jelmer Vernooij)

* ``read_bundle_from_url`` is deprecated in favor of
  ``read_mergeable_from_url``.  (Vincent Ladeuil)

* Revision specifiers are now registered in
  ``bzrlib.revisionspec.revspec_registry``, and the old list of 
  revisionspec classes (``bzrlib.revisionspec.SPEC_TYPES``) has been
  deprecated. (Jelmer Vernooij, #321183)

* The progress and UI classes have changed; the main APIs remain the
  same but code that provides a new UI or progress bar class may
  need to be updated.  (Martin Pool)

Internals
*********

* Default User Interface (UI) is CLIUIFactory when bzr runs in a dumb
  terminal. It is sometimes desirable do override this default by forcing
  bzr to use TextUIFactory. This can be achieved by setting the
  BZR_USE_TEXT_UI environment variable (emacs shells, as opposed to
  compile buffers, are such an example).
  (Vincent Ladeuil)

* New API ``Branch.iter_merge_sorted_revisions()`` that iterates over
  ``(revision_id, depth, revno, end_of_merge)`` tuples.
  (Ian Clatworthy)

* New ``Branch.dotted_revno_to_revision_id()`` and
  ``Branch.revision_id_to_dotted_revno()`` APIs that pick the most
  efficient way of doing the mapping.
  (Ian Clatworthy)

* Refactor cmd_serve so that it's a little easier to build commands that
  extend it, and perhaps even a bit easier to read.  (Jonathan Lange)

* ``TreeDelta.show()`` now accepts a ``filter`` parameter allowing log
  formatters to retrict the output.
  (Vincent Ladeuil)


bzr 1.11 "Eyes up!" 2009-01-19
##############################

This first monthly release of Bazaar for 2009 improves Bazaar's operation
in Windows, Mac OS X, and other situations where file names are matched
without regard to capitalization: Bazaar tries to match the case of an
existing file.  This release of Bazaar also improves the efficiency of
Tortoise Windows Shell integration and lets it work on 64-bit platforms.

The UI through which Bazaar supports historic formats has been improved,
so 'bzr help formats' now gives a simpler and shorter list, with clear
advice.

This release also fixes a number of bugs, particularly a glitch that can
occur when there are concurrent writes to a pack repository.

Bug Fixes
*********

* Fix failing test when CompiledChunksToLines is not available.
  (Vincent Ladeuil)

* Stacked branches don't repeatedly open their transport connection.
  (John Arbash Meinel)



bzr 1.11rc1 "Eyes up!" 2009-01-09
#################################

Changes
*******

* Formats using Knit-based repository formats are now explicitly
  marked as deprecated. (Ian Clatworthy)

New Features
************

* Add support for `bzr tags -r 1..2`, that is we now support showing
  tags applicable for a specified revision range. (Marius Kruger)

* ``authentication.conf`` now accepts pluggable read-only credential
  stores. Such a plugin (``netrc_credential_store``) is now included,
  handles the ``$HOME/.netrc`` file and can server as an example to
  implement other plugins.
  (Vincent Ladeuil)

* ``shelve --list`` can now be used to list shelved changes.
  (Aaron Bentley)

Improvements
************

* Add trailing slash to directories in all output of ``bzr ls``, except
  ``bzr ls --null``. (Gordon P. Hemsley, #306424)

* ``bzr revision-info`` now supports a -d option to specify an
  alternative branch. (Michael Hudson)

* Add connection to a C++ implementation of the Windows Shell Extension
  which is able to fully replace the current Python implemented one.
  Advantages include 64bit support and reduction in overhead for
  processes which drag in shell extensions.
  (Mark Hammond)

* Support the Claws mail client directly, rather than via
  xdg-email. This prevents the display of an unnecessary modal
  dialog in Claws, informing the user that a file has been
  attached to the message, and works around bug #291847 in
  xdg-utils which corrupts the destination address.

* When working on a case-insensitive case-preserving file-system, as
  commonly found with Windows, bzr will often ignore the case of the
  arguments specified by the user in preference to the case of an existing
  item on the file-system or in the inventory to help prevent
  counter-intuitive behaviour on Windows. (Mark Hammond)

Bug Fixes
*********
  
* Allow BzrDir implementation to implement backing up of 
  control directory. (#139691)

* ``bzr push`` creating a new stacked branch will now only open a
  single connection to the target machine. (John Arbash Meinel)

* Don't call iteritems on transport_list_registry, because it may
  change during iteration.  (Martin Pool, #277048)

* Don't make a broken branch when pushing an unstackable-format branch
  that's in a stackable shared repository to a location with default
  stack-on location.  (Andrew Bennetts, #291046)

* Don't require embedding user in HTTP(S) URLs do use authentication.conf.
  (Ben Jansen, Vincent Ladeuil, #300347)

* Fix a problem with CIFS client/server lag on windows colliding with
  an invariant-per-process algorithm for generating AtomicFile names
  (Adrian Wilkins, #304023)

* Fix bogus setUp signature in UnavailableFTPServer.
  (Gary van der Merwe, #313498)

* Fix compilation error in ``_dirstate_helpers_c`` on SunOS/Solaris.
  (Jari Aalto)

* Fix SystemError in ``_patiencediff_c`` module by calling
  PyErr_NoMemory() before returning NULL in PatienceSequenceMatcher_new.
  (Andrew Bennetts, #303206)

* Give proper error message for diff with non-existent dotted revno.
  (Marius Kruger, #301969)

* Handle EACCES (permission denied) errors when launching a message
  editor, and emit warnings when a configured editor cannot be
  started. (Andrew Bennetts)

* ``$HOME/.netrc`` file is now recognized as a read-only credential store
  if configured in ``authentication.conf`` with 'password_encoding=netrc'
  in the appropriate sections.
  (Vincent Ladeuil, #103029)

* Opening a stacked branch now properly shares the connection, rather
  than opening a new connection for the stacked-on branch.
  (John Arbash meinel)

* Preserve transport decorators while following redirections.
  (Vincent Ladeuil, #245964, #270863)

* Provides a finer and more robust filter for accepted redirections.
  (Vincent Ladeuil, #303959, #265070)

* ``shelve`` paths are now interpreted relative to the current working
  tree.  (Aaron Bentley)

* ``Transport.readv()`` defaults to not reading more than 100MB in a
  single array. Further ``RemoteTransport.readv`` sets this to 5MB to
  work better with how it splits its requests.
  (John Arbash Meinel, #303538)

* Pack repositories are now able to reload the pack listing and retry
  the current operation if another action causes the data to be
  repacked.  (John Arbash Meinel, #153786)

* ``pull -v`` now respects the log_format configuration variable.
  (Aaron Bentley)

* ``push -v`` now works on non-initial pushes.  (Aaron Bentley)

* Use the short status format when the short format is used for log.
  (Vincent Ladeuil, #87179)

* Allow files to be renamed or moved via remove + add-by-id. (Charles
  Duffy, #314251)

Documentation
*************

* Improved the formats help topic to explain why multiple formats
  exist and to provide guidelines in selecting one. Introduced
  two new supporting help topics: current-formats and other-formats.
  (Ian Clatworthy)

API Changes
***********

* ``LRUCache(after_cleanup_size)`` was renamed to
  ``after_cleanup_count`` and the old name deprecated. The new name is
  used for clarity, and to avoid confusion with
  ``LRUSizeCache(after_cleanup_size)``. (John Arbash Meinel)

* New ``ForeignRepository`` base class, to help with foreign branch 
  support (e.g. svn).  (Jelmer Vernooij)

* ``node_distances`` and ``select_farthest`` can no longer be imported
  from ``bzrlib.graph``.  They can still be imported from
  ``bzrlib.deprecated_graph``, which has been the preferred way to
  import them since before 1.0.  (Andrew Bennetts)
  
* The logic in commit now delegates inventory basis calculations to
  the ``CommitBuilder`` object; this requires that the commit builder
  in use has been updated to support the new ``recording_deletes`` and
  ``record_delete`` methods. (Robert Collins)

Testing
*******

* An HTTPS server is now available (it requires python-2.6). Future bzr
  versions will allow the use of the python-2.6 ssl module that can be
  installed for 2.5 and 2.4.

* ``bzr selftest`` now fails if new trailing white space is added to
  the bazaar sources. It only checks changes not committed yet. This
  means that PQM will now reject changes that introduce new trailing
  whitespace. (Marius Kruger)

* Introduced new experimental formats called ``1.12-preview`` and
  ``1.12-preview-rich-root`` to enable testing of related pending
  features, namely content filtering and filtered views.
  (Ian Clatworthy)

Internals
*********

* Added an ``InventoryEntry`` cache when deserializing inventories.
  Can cut the time to iterate over multiple RevisionsTrees in half.
  (John Arbash Meinel)

* Added ``bzrlib.fifo_cache.FIFOCache`` which is designed to have
  minimal overhead versus using a plain dict for cache hits, at the
  cost of not preserving the 'active' set as well as an ``LRUCache``.
  (John Arbash Meinel)

* ``bzrlib.patience_diff.unified_diff`` now properly uses a tab
  character to separate the filename from the date stamp, and doesn't
  add trailing whitespace when a date stamp is not supplied.
  (Adeodato Simó, John Arbash Meinel)

* ``DirStateWorkingTree`` and ``DirStateWorkingTreeFormat`` added
  as base classes of ``WorkingTree4`` and ``WorkingTreeFormat4``
  respectively. (Ian Clatworthy)

* ``KnitVersionedFiles._check_should_delta()`` now uses the
  ``get_build_details`` api to avoid multiple hits to the index, and
  to properly follow the ``compression_parent`` rather than assuming
  it is the left-hand parent. (John Arbash Meinel)

* ``KnitVersionedFiles.get_record_stream()`` will now chose a
  more optimal ordering when the keys are requested 'unordered'.
  Previously the order was fully random, now the records should be
  returned from each pack in turn, in forward I/O order.
  (John Arbash Meinel)
    
* ``mutter()`` will now flush the ``~/.bzr.log`` if it has been more
  than 2s since the last time it flushed. (John Arbash Meinel)

* New method ``bzrlib.repository.Repository.add_inventory_by_delta``
  allows adding an inventory via an inventory delta, which can be
  more efficient for some repository types. (Robert Collins)

* Repository ``CommitBuilder`` objects can now accumulate an inventory
  delta. To enable this functionality call ``builder.recording_deletes``
  and additionally call ``builder.record_delete`` when a delete
  against the basis occurs. (Robert Collins)

* The default http handler has been changed from pycurl to urllib.
  The default is still pycurl for https connections. (The only
  advantage of pycurl is that it checks ssl certificates.)
  (John Arbash Meinel)

* ``VersionedFiles.get_record_stream()`` can now return objects with a
  storage_kind of ``chunked``. This is a collection (list/tuple) of
  strings. You can use ``osutils.chunks_to_lines()`` to turn them into
  guaranteed 'lines' or you can use ``''.join(chunks)`` to turn it
  into a fulltext. This allows for some very good memory savings when
  asking for many texts that share ancestry, as the individual chunks
  can be shared between versions of the file. (John Arbash Meinel)

* ``pull -v`` and ``push -v`` use new function
  ``bzrlib.log.show_branch_change`` (Aaron Bentley)



bzr 1.10 2008-12-05
###################

Bazaar 1.10 has several performance improvements for copying revisions
(especially for small updates to large projects).  There has also been a
significant amount of effort in polishing stacked branches.  The commands
``shelve`` and ``unshelve`` have become core commands, with an improved
implementation.

The only changes versus bzr-1.10rc1 are bugfixes for stacked branches.

bug Fixes
*********

* Don't set a pack write cache size from RepoFetcher, because the
  cache is not coherent with reads and causes ShortReadvErrors.
  This reverses the change that fixed #294479.
  (Martin Pool, #303856)

* Properly handle when a revision can be inserted as a delta versus
  when it needs to be expanded to a fulltext for stacked branches.
  There was a bug involving merge revisions. As a method to help
  prevent future difficulties, also make stacked fetches sort
  topologically. (John Arbash Meinel, #304841)


bzr 1.10rc1 2008-11-28
######################

This release of Bazaar focuses on performance improvements when pushing
and pulling revisions, both locally and to remote networks.  The popular
``shelve`` and ``unshelve`` commands, used to interactively revert and
restore work in progress, have been merged from bzrtools into the bzr
core.  There are also bug fixes for portability, and for stacked branches.

New Features
************

* New ``commit_message_template`` hook that is called by the commit
  code to generate a template commit message. (Jelmer Vernooij)

* New `shelve` and `unshelve` commands allow undoing and redoing changes.
  (Aaron Bentley)

Improvements
************

* ``(Remote)Branch.copy_content_into`` no longer generates the full revision
  history just to set the last revision info.
  (Andrew Bennetts, John Arbash Meinel)

* Fetches between formats with different serializers (such as
  pack-0.92-subtree and 1.9-rich-root) are faster now.  This is due to
  operating on batches of 100 revisions at time rather than
  one-by-one.  (Andrew Bennetts, John Arbash Meinel)

* Search index files corresponding to pack files we've already used
  before searching others, because they are more likely to have the
  keys we're looking for.  This reduces the number of iix and tix
  files accessed when pushing 1 new revision, for instance.
  (John Arbash Meinel)

* Signatures to transfer are calculated more efficiently in
  ``item_keys_introduced_by``.  (Andrew Bennetts, John Arbash Meinel)

* The generic fetch code can once again copy revisions and signatures
  without extracting them completely to fulltexts and then serializing
  them back down into byte strings. This is a significant performance
  improvement when fetching from a stacked branch.
  (John Arbash Meinel, #300289)

* When making a large readv() request over ``bzr+ssh``, break up the
  request into more manageable chunks. Because the RPC is not yet able
  to stream, this helps keep us from buffering too much information at
  once. (John Arbash Meinel)

Bug Fixes
*********

* Better message when the user needs to set their Launchpad ID.
  (Martin Pool, #289148)

* ``bzr commit --local`` doesn't access the master branch anymore.
  This fixes a regression introduced in 1.9.  (Marius Kruger, #299313)

* Don't call the system ``chdir()`` with an empty path. Sun OS seems
  to give an error in that case.  Also, don't count on ``getcwd()``
  being able to allocate a new buffer, which is a gnu extension.
  (John Arbash Meinel, Martin Pool, Harry Hirsch, #297831)

* Don't crash when requesting log --forward <file> for a revision range
  starting with a dotted revno.
  (Vincent Ladeuil, #300055)

* Don't create text deltas spanning stacked repositories; this could
  cause "Revision X not present in Y" when later accessing them.
  (Martin Pool, #288751)

* Pack repositories are now able to reload the pack listing and retry
  the current operation if another action causes the data to be
  repacked.  (John Arbash Meinel, #153786)

* PermissionDenied errors from smart servers no longer cause
  "PermissionDenied: "None"" on the client.
  (Andrew Bennetts, #299254)

* Pushing to a stacked pack repository now batches writes, the same
  way writes are batched to ordinary pack repository.  This makes
  pushing to a stacked branch over the network much faster.
  (Andrew Bennetts, #294479)

* TooManyConcurrentRequests no longer occur when a fetch fails and
  tries to abort a write group.  This allows the root cause (e.g. a
  network interruption) to be reported.  (Andrew Bennetts, #297014)

* RemoteRepository.get_parent_map now uses fallback repositories.
  (Aaron Bentley, #297991?, #293679?)

API Changes
***********

* ``CommitBuilder`` now validates the strings it will be committing,
  to ensure that they do not have characters that will not be properly
  round-tripped. For now, it just checks for characters that are
  invalid in the XML form. (John Arbash Meinel, #295161)

* Constructor parameters for NewPack (internal to pack repositories)
  have changed incompatibly.

* ``Repository.abort_write_group`` now accepts an optional
  ``suppress_errors`` flag.  Repository implementations that override
  ``abort_write_group`` will need to be updated to accept the new
  argument.  Subclasses that only override ``_abort_write_group``
  don't need to change.

* Transport implementations must provide copy_tree_to_transport.  A default
  implementation is provided for Transport subclasses.

Testing
*******

* ``bzr selftest`` now fails if no doctests are found in a module
  that's expected to have them.  (Martin Pool)

* Doctests now only report the first failure.  (Martin Pool)


bzr 1.9 2008-11-07
##################

This release of Bazaar adds a new repository format, ``1.9``, with smaller
and more efficient index files.  This format can be specified when
creating a new repository, or used to losslessly upgrade an existing
repository.  bzr 1.9 also speeds most operations over the smart server
protocol, makes annotate faster, and uses less memory when making
checkouts or pulling large amounts of data.

Bug Fixes
*********

* Fix "invalid property value 'branch-nick' for None" regression with
  branches bound to svn branches.  (Martin Pool, #293440)

* Fix SSL/https on Python2.6.  (Vincent Ladeuil, #293054)

* ``SFTPTransport.readv()`` had a bug when requests were out-of-order.
  This only triggers some-of-the-time on Knit format repositories.
  (John Arbash Meinel, #293746)


bzr 1.9rc1 2008-10-31
#####################

New Features
************

* New Branch hook ``transform_fallback_location`` allows a function to
  be called when looking up the stacked source. (Michael Hudson)

* New repository formats ``1.9`` and ``1.9-rich-root``. These have all
  the functionality of ``1.6``, but use the new btree indexes.
  These indexes are both smaller and faster for access to historical
  information.  (John Arbash Meinel)

Improvements
************

* ``BTreeIndex`` code now is able to prefetch extra pages to help tune
  the tradeoff between bandwidth and latency. Should be tuned
  appropriately to not impact commands which need minimal information,
  but provide a significant boost to ones that need more context. Only
  has a direct impact on the ``--development2`` format which uses
  btree's for the indexes. (John Arbash Meinel)

* ``bzr dump-btree`` is a hidden command introduced to allow dumping
  the contents of a compressed btree file.  (John Arbash Meinel)

* ``bzr pack`` now tells the index builders to optimize for size. For
  btree index repositories, this can save 25% of the index size
  (mostly in the text indexes). (John Arbash Meinel)

* ``bzr push`` to an existing branch or repository on a smart server
  is faster, due to Bazaar making more use of the ``get_parent_map``
  RPC when querying the remote branch's revision graph.
  (Andrew Bennetts)

* default username for bzr+ssh and sftp can be configured in
  authentication.conf. (Aaron Bentley)

* launchpad-login now provides a default username for bzr+ssh and sftp
  URLs, allowing username-free URLs to work for everyone. (Aaron Bentley)

* ``lp:`` lookups no longer include usernames, making them shareable and
  shorter. (Aaron Bentley)

* New ``PackRepository.autopack`` smart server RPC, which does
  autopacking entirely on the server.  This is much faster than
  autopacking via plain file methods, which downloads a large amount
  of pack data and then re-uploads the same pack data into a single
  file.  This fixes a major (although infrequent) cause of lengthy
  delays when using a smart server.  For example, pushing the 10th
  revision to a repository with 9 packs now takes 44 RPCs rather than
  179, and much less bandwidth too.  This requires Bazaar 1.9 on both
  the client and the server, otherwise the client will fallback to the
  slower method.  (Andrew Bennetts)

Bug Fixes
*********

* A failure to load a plugin due to an IncompatibleAPI exception is
  now correctly reported. (Robert Collins, #279451)

* API versioning support now has a multiple-version checking api
  ``require_any_api``. (Robert Collins, #279447)

* ``bzr branch --stacked`` from a smart server to a standalone branch
  works again.  This fixes a regression in 1.7 and 1.8.
  (Andrew Bennetts, #270397)

* ``bzr co`` uses less memory. It used to unpack the entire WT into
  memory before writing it to disk. This was a little bit faster, but
  consumed lots of memory. (John Arbash Meinel, #269456)

* ``bzr missing --quiet`` no longer prints messages about whether
  there are missing revisions.  The exit code indicates whether there
  were or not.  (Martin Pool, #284748)

* Fixes to the ``annotate`` code. The fast-path which re-used the
  stored deltas was accidentally disabled all the time, instead of
  only when a branch was stacked. Second, the code would accidentally
  re-use a delta even if it wasn't against the left-parent, this
  could only happen if ``bzr reconcile`` decided that the parent
  ordering was incorrect in the file graph.  (John Arbash Meinel)

* "Permission denied" errors that occur when pushing a new branch to a
  smart server no longer cause tracebacks.  (Andrew Bennetts, #278673)

* Some compatibility fixes for building the extensions with MSVC and
  for python2.4. (John Arbash Meinel, #277484)

* The index logic is now able to reload the list of pack files if and
  index ends up disappearing. We still don't reload if the pack data
  itself goes missing after checking the index. This bug appears as a
  transient failure (file not found) when another process is writing
  to the repository.  (John Arbash Meinel, #153786)

* ``bzr switch`` and ``bzr bind`` will now update the branch nickname if
  it was previously set. All checkouts will now refer to the bound branch
  for a nickname if one was not explicitly set.
  (Marius Kruger, #230903)

Documentation
*************

* Improved hook documentation. (Michael Ernst)

API Changes
***********

* commands.plugins_cmds is now a CommandRegistry, not a dict.

Internals
*********

* New AuthenticationConfig.set_credentials method allows easy programmatic
  configuration of authetication credentials.


bzr 1.8 2008-10-16
##################

Bazaar 1.8 includes several fixes that improve working tree performance,
display of revision logs, and merges.  The bzr testsuite now passes on OS
X and Python 2.6, and almost completely passes on Windows.  The
smartserver code has gained several bug fixes and performance
improvements, and can now run server-side hooks within an http server.

Bug Fixes
*********

* Fix "Must end write group" error when another error occurs during
  ``bzr push``.  (Andrew Bennetts, #230902)

Portability
***********

* Some Pyrex versions require the WIN32 macro defined to compile on
  that platform.  (Alexander Belchenko, Martin Pool, #277481)


bzr 1.8rc1 2008-10-07
#####################

Changes
*******

* ``bzr log file`` has been changed. It now uses a different method
  for determining which revisions to show as merging the changes to
  the file. It now only shows revisions which merged the change
  towards your mainline. This simplifies the output, makes it faster,
  and reduces memory consumption.  (John Arbash Meinel)

* ``bzr merge`` now defaults to having ``--reprocess`` set, whenever
  ``--show-base`` is not supplied.  (John Arbash Meinel)

* ``bzr+http//`` will now optionally load plugins and write logs on the
  server. (Marius Kruger)

* ``bzrlib._dirstate_helpers_c.pyx`` does not compile correctly with
  Pyrex 0.9.4.1 (it generates C code which causes segfaults). We
  explicitly blacklist that version of the compiler for that
  extension. Packaged versions will include .c files created with
  pyrex >= 0.9.6 so it doesn't effect releases, only users running
  from the source tree. (John Arbash Meinel, #276868)

Features
********

* bzr is now compatible with python-2.6. python-2.6 is not yet officially
  supported (nor released, tests were conducted with the dev version of
  python-2.6rc2), but all known problems have been fixed.  Feedback
  welcome.
  (Vincent Ladeuil, #269535)

Improvements
************

* ``bzr annotate`` will now include uncommitted changes from the local
  working tree by default. Such uncommitted changes are given the
  revision number they would get if a commit was done, followed with a
  ? to indicate that its not actually known. (Robert Collins, #3439)

* ``bzr branch`` now accepts a ``--standalone`` option, which creates a
  standalone branch regardless of the presence of shared repositories.
  (Daniel Watkins)

* ``bzr push`` is faster in the case there are no new revisions to
  push.  It is also faster if there are no tags in the local branch.
  (Andrew Bennetts)

* File changes during a commit will update the tree stat cache.
  (Robert Collins)

* Location aliases can now accept a trailing path.  (Micheal Hudson)

* New hooks ``Lock.hooks`` when LockDirs are acquired and released.
  (Robert Collins, MartinPool)

* Switching in heavyweight checkouts uses the master branch's context, not
  the checkout's context.  (Adrian Wilkins)

* ``status`` on large trees is now faster, due to optimisations in the
  walkdirs code. Of particular note, the walkdirs code now performs
  a temporary ``chdir()`` while reading a single directory; if your
  platform has non thread-local current working directories (and is
  not windows which has its own implementation), this may introduce a
  race condition during concurrent uses of bzrlib. The bzrlib CLI
  will not encounter this as it is single threaded for working tree
  operations. (Robert Collins)

* The C extensions now build on python 2.4 (Robert Collins, #271939)

* The ``-Dhpss`` debug flag now reports the number of smart server
  calls per medium to stderr.  This is in addition to the existing
  detailed logging to the .bzr.log trace file.  (Andrew Bennetts)

Bug Fixes
*********

* Avoid random failures arising from misinterpreted ``errno`` values
  in ``_readdir_pyx.read_dir``.
  (Martin Pool, #279381)

* Branching from a shared repository on a smart server into a new
  repository now preserves the repository format.
  (Andrew Bennetts, #269214)

* ``bzr log`` now accepts a ``--change`` option.
  (Vincent Ladeuil, #248427)

* ``bzr missing`` now accepts an ``--include-merges`` option.
  (Vincent Ladeuil, #233817)

* Don't try to filter (internally) '.bzr' from the files to be deleted if
  it's not there.
  (Vincent Ladeuil, #272648)

* Fix '_in_buffer' AttributeError when using the -Dhpss debug flag.
  (Andrew Bennetts)

* Fix TooManyConcurrentRequests errors caused by a connection failure
  when doing ``bzr pull`` or ``bzr merge`` from a ``bzr+ssh`` URL.
  (Andrew Bennetts, #246233)

* Fixed ``bzr st -r branch:PATH_TO_BRANCH`` where the other branch
  is in a different repository than the current one.
  (Lukáš Lalinský, #144421)

* Make the first line of the manpage preamble a comment again.
  (David Futcher, #242106)

* Remove use of optional parameter in GSSAPI FTP support, since
  it breaks newer versions of Python-Kerberos. (Jelmer Vernooij)

* The autopacking logic will now always create a single new pack from
  all of the content which it deems is worth moving. This avoids the
  'repack a single pack' bug and should result in better packing
  overall.  (John Arbash Meinel, #242510, #172644)

* Trivial documentation fix.
  (John Arbash Meinel, #270471)

* ``bzr switch`` and ``bzr bind`` will now update the branch nickname if
  it was previously set. All checkouts will now refer to the bound branch
  for a nickname if one was not explicitly set.
  (Marius Kruger, #230903)

Documentation
*************

* Explain revision/range identifiers. (Daniel Clemente)

API Changes
***********

* ``CommitBuilder.record_entry_contents`` returns one more element in
  its result tuple - an optional file system hash for the hash cache
  to use. (Robert Collins)

* ``dirstate.DirState.update_entry`` will now only calculate the sha1
  of a file if it is likely to be needed in determining the output
  of iter_changes. (Robert Collins)

* The PackRepository, RepositoryPackCollection, NewPack classes have a
  slightly changed interface to support different index types; as a
  result other users of these classes need to supply the index types
  they want. (Robert Collins)

Testing
*******

* ``bzrlib.tests.repository_implementations`` has been renamed to
  ``bzrlib.tests.per_repository`` so that we have a common structure
  (and it is shorter). (John Arbash Meinel, #239343)

* ``LocalTransport.abspath()`` now returns a drive letter if the
  transport has one, fixing numerous tests on Windows.
  (Mark Hammond)

* PreviewTree is now tested via intertree_implementations.
  (Aaron Bentley)

* The full test suite is passing again on OSX.
  (Guillermo Gonzalez, Vincent Ladeuil)

* The full test suite passes when run with ``-Eallow_debug``.
  (Andrew Bennetts)

Internals
*********

* A new hook, ``Branch.open``, has been added, which is called when
  branch objects are opened. (Robert Collins)

* ``bzrlib.osutils._walkdirs_utf8`` has been refactored into common
  tree walking, and modular directory listing code to aid future
  performance optimisations and refactoring. (Robert Collins)

* ``bzrlib.trace.debug_memory`` can be used to get a quick memory dump
  in the middle of processing. It only reports memory if
  ``/proc/PID/status`` is available. (John Arbash Meinel)

* New method ``RevisionSpec.as_tree`` for representing the revision
  specifier as a revision tree object. (Lukáš Lalinský)

* New race-free method on MutableTree ``get_file_with_stat`` for use
  when generating stat cache results. (Robert Collins)

* New win32utils.get_local_appdata_location() provides access to a local
  directory for storing data.  (Mark Hammond)

* To be compatible with python-2.6 a few new rules should be
  observed. 'message' attribute can't be used anymore in exception
  classes, 'sha' and 'md5' modules have been deprecated (use
  osutils.[md5|sha]), object__init__ and object.__new__ don't accept
  parameters anymore.
  (Vincent Ladeuil)


bzr 1.7.1 2008-10-01
####################

No changes from 1.7.1rc1.


bzr 1.7.1rc1 2008-09-24
#######################

This release just includes an update to how the merge algorithm handles
file paths when we encounter complex history.

Features
********

* If we encounter a criss-cross in history, use information from
  direct Least Common Ancestors to resolve inventory shape (locations
  of files, adds, deletes, etc). This is similar in concept to using
  ``--lca`` for merging file texts, only applied to paths.
  (John Arbash Meinel)


bzr 1.7 2008-09-23
##################

This release includes many bug fixes and a few performance and feature
improvements.  ``bzr rm`` will now scan for missing files and remove them,
like how ``bzr add`` scans for unknown files and adds them. A bit more
polish has been applied to the stacking code. The b-tree indexing code has
been brought in, with an eye on using it in a future repository format.
There are only minor installer changes since bzr-1.7rc2.

Features
********

* Some small updates to the win32 installer. Include localization
  files found in plugins, and include the builtin distutils as part of
  packaging qbzr. (Mark Hammond)


bzr 1.7rc2 2008-09-17
#####################

A few bug fixes from 1.7rc1. The biggest change is a new
``RemoteBranch.get_stacked_on_url`` rpc. This allows clients that are
trying to access a Stacked branch over the smart protocol, to properly
connect to the stacked-on location.

Bug Fixes
*********

* Branching from a shared repository on a smart server into a new
  repository now preserves the repository format.
  (Andrew Bennetts, #269214)

* Branching from a stacked branch via ``bzr+ssh`` can properly connect
  to the stacked-on branch.  (Martin Pool, #261315)

* ``bzr init`` no longer re-opens the BzrDir multiple times.
  (Vincent Ladeuil)

* Fix '_in_buffer' AttributeError when using the -Dhpss debug flag.
  (Andrew Bennetts)


bzr 1.7rc1 2008-09-09
#####################

This release candidate for bzr 1.7 has several bug fixes and a few
performance and feature improvements.  ``bzr rm`` will now scan for
missing files and remove them, like how ``bzr add`` scans for unknown
files and adds them. A bit more polish has been applied to the stacking
code. The b-tree indexing code has been brought in, with an eye on using
it in a future repository format.


Changes
*******

* ``bzr export`` can now export a subdirectory of a project.
  (Robert Collins)

* ``bzr remove-tree`` will now refuse to remove a tree with uncommitted
  changes, unless the ``--force`` option is specified.
  (Lukáš Lalinský, #74101)

* ``bzr rm`` will now scan for files that are missing and remove just
  them automatically, much as ``bzr add`` scans for new files that
  are not ignored and adds them automatically. (Robert Collins)

Features
********

* Support for GSSAPI authentication when using FTP as documented in
  RFC2228. (Jelmer Vernooij, #49623)

* Add support for IPv6 in the smart server. (Jelmer Vernooij, #165014)

Improvements
************

* A url like ``log+file:///tmp`` will log all access to that Transport
  to ``.bzr.log``, which may help in debugging or profiling.
  (Martin Pool)

* ``bzr branch`` and ``bzr push`` use the default stacking policy if the
  branch format supports it. (Aaron Bentley)

* ``bzr init`` and ``bzr init-repo`` will now print out the same as
  ``bzr info`` if it completed successfully.
  (Marius Kruger)

* ``bzr uncommit`` logs the old tip revision id, and displays how to
  restore the branch to that tip using ``bzr pull``.  This allows you
  to recover if you realize you uncommitted the wrong thing.
  (John Arbash Meinel)

* Fix problems in accessing stacked repositories over ``bzr://``.
  (Martin Pool, #261315)

* ``SFTPTransport.readv()`` was accidentally using ``list += string``,
  which 'works', but adds each character separately to the list,
  rather than using ``list.append(string)``. Fixing this makes the
  SFTP transport a little bit faster (~20%) and use a bit less memory.
  (John Arbash Meinel)

* When reading index files, if we happen to read the whole file in a
  single request treat it as a ``_buffer_all`` request. This happens
  most often on small indexes over remote transports, where we default
  to reading 64kB. It saves a round trip for each small index during
  fetch operations. Also, if we have read more than 50% of an index
  file, trigger a ``_buffer_all`` on the next request. This works
  around some inefficiencies because reads don't fall neatly on page
  boundaries, so we would ignore those bytes, but request them again
  later. This could trigger a total read size of more than the whole
  file. (John Arbash Meinel)

Bug Fixes
*********

* ``bzr rm`` is now aliased to ``bzr del`` for the convenience of svn
  users. (Robert Collins, #205416)

* Catch the infamous "select/poll returned error" which occurs when
  pycurl try to send a body request to an HTTP/1.0 server which has
  already refused to handle the request. (Vincent Ladeuil, #225020)

* Fix ``ObjectNotLocked`` errors when using various commands
  (including ``bzr cat`` and ``bzr annotate``) in combination with a
  smart server URL.  (Andrew Bennetts, #237067)

* ``FTPTransport.stat()`` would return ``0000`` as the permission bits
  for the containing ``.bzr/`` directory (it does not implement
  permissions). This would cause us to set all subdirectories to
  ``0700`` and files to ``0600`` rather than leaving them unmodified.
  Now we ignore ``0000`` as the permissions and assume they are
  invalid. (John Arbash Meinel, #259855)

* Merging from a previously joined branch will no longer cause
  a traceback. (Jelmer Vernooij, #203376)

* Pack operations on windows network shares will work even with large
  files. (Robert Collins, #255656)

* Running ``bzr st PATH_TO_TREE`` will no longer suppress merge
  status. Status is also about 7% faster on mozilla sized trees
  when the path to the root of the tree has been given. Users of
  the internal ``show_tree_status`` function should be aware that
  the show_pending flag is now authoritative for showing pending
  merges, as it was originally. (Robert Collins, #225204)

* Set valid default _param_name for Option so that ListOption can embed
  '-' in names. (Vincent Ladeuil, #263249)

* Show proper error rather than traceback when an unknown revision
  id is specified to ``bzr cat-revision``. (Jelmer Vernooij, #175569)

* Trailing text in the dirstate file could cause the C dirstate parser
  to try to allocate an invalid amount of memory. We now properly
  check and test for parsing a dirstate with invalid trailing data.
  (John Arbash Meinel, #186014)

* Unexpected error responses from a smart server no longer cause the
  client to traceback.  (Andrew Bennetts, #263527)

* Use a Windows api function to get a Unicode host name, rather than
  assuming the host name is ascii.
  (Mark Hammond, John Arbash Meinel, #256550)

* ``WorkingTree4`` trees will now correctly report missing-and-new
  paths in the output of ``iter_changes``. (Robert Collins)

Documentation
*************

* Updated developer documentation.  (Martin Pool)

API Changes
***********

* Exporters now take 4 parameters. (Robert Collins)

* ``Tree.iter_changes`` will now return False for the content change
  field when a file is missing in the basis tree and not present in
  the target tree. Previously it returned True unconditionally.
  (Robert Collins)

* The deprecated ``Branch.abspath`` and unimplemented
  ``Branch.rename_one`` and ``Branch.move`` were removed. (Jelmer Vernooij)

* BzrDir.clone_on_transport implementations must now accept a stacked_on
  parameter.  (Aaron Bentley)

* BzrDir.cloning_metadir implementations must now take a require_stacking
  parameter.  (Aaron Bentley)

Testing
*******

* ``addCleanup`` now takes ``*arguments`` and ``**keyword_arguments``
  which are then passed to the cleanup callable as it is run. In
  addition, addCleanup no longer requires that the callables passed to
  it be unique. (Jonathan Lange)

* Fix some tests that fail on Windows because files are deleted while
  still in use.
  (Mark Hammond)

* ``selftest``'s ``--starting-with`` option can now use predefined
  prefixes so that one can say ``bzr selftest -s bp.loom`` instead of
  ``bzr selftest -s bzrlib.plugins.loom``. (Vincent Ladeuil)

* ``selftest``'s ``--starting-with`` option now accepts multiple values.
  (Vincent Ladeuil)

Internals
*********

* A new plugin interface, ``bzrlib.log.log_adapters``, has been added.
  This allows dynamic log output filtering by plugins.
  (Robert Collins)

* ``bzrlib.btree_index`` is now available, providing a b-tree index
  layer. The design is memory conservative (limited memory cache),
  faster to seek (approx 100 nodes per page, gives 100-way fan out),
  and stores compressed pages allowing more keys per page.
  (Robert Collins, John Arbash Meinel)

* ``bzrlib.diff.DiffTree.show_diff`` now skips changes where the kind
  is unknown in both source and target.
  (Robert Collins, Aaron Bentley)

* ``GraphIndexBuilder.add_node`` and ``BTreeBuilder`` have been
  streamlined a bit. This should make creating large indexes faster.
  (In benchmarking, it now takes less time to create a BTree index than
  it takes to read the GraphIndex one.) (John Arbash Meinel)

* Mail clients for `bzr send` are now listed in a registry.  This
  allows plugins to add new clients by registering them with
  ``bzrlib.mail_client.mail_client_registry``.  All of the built-in
  clients now use this mechanism.  (Neil Martinsen-Burrell)


bzr 1.6.1 2008-09-05
####################

A couple regressions were found in the 1.6 release. There was a
performance issue when using ``bzr+ssh`` to branch large repositories,
and some problems with stacking and ``rich-root`` capable repositories.


bzr 1.6.1rc2 2008-09-03
#######################

Bug Fixes
*********

* Copying between ``rich-root`` and ``rich-root-pack`` (and vice
  versa) was accidentally using the inter-model fetcher, instead of
  recognizing that both were 'rich root' formats.
  (John Arbash Meinel, #264321)


bzr 1.6.1rc1 2008-08-29
#######################

This release fixes a few regressions found in the 1.6 client. Fetching
changes was using an O(N^2) buffering algorithm, so for large projects it
would cause memory thrashing. There is also a specific problem with the
``--1.6-rich-root`` format, which prevented stacking on top of
``--rich-root-pack`` repositories, and could allow users to accidentally
fetch experimental data (``-subtree``) without representing it properly.
The ``--1.6-rich-root`` format has been deprecated and users are
recommended to upgrade to ``--1.6.1-rich-root`` immediately.  Also we
re-introduced a workaround for users who have repositories with incorrect
nodes (not possible if you only used official releases).
I should also clarify that none of this is data loss level issues, but
still sufficient enough to warrant an updated release.

Bug Fixes
*********

* ``RemoteTransport.readv()`` was being inefficient about how it
  buffered the readv data and processed it. It would keep appending to
  the same string (causing many copies) and then pop bytes out of the
  start of the string (causing more copies).
  With this patch "bzr+ssh://local" can improve dramatically,
  especially for projects with large files.
  (John Arbash Meinel)

* Revision texts were always meant to be stored as fulltexts. There
  was a bug in a bzr.dev version that would accidentally create deltas
  when copying from a Pack repo to a Knit repo. This has been fixed,
  but to support those repositories, we know always request full texts
  for Revision texts. (John Arbash Meinel, #261339)

* The previous ``--1.6-rich-root`` format used an incorrect xml
  serializer, which would accidentally support fetching from a
  repository that supported subtrees, even though the local one would
  not. We deprecated that format, and introduced a new one that uses
  the correct serializer ``--1.6.1-rich-root``.
  (John Arbash Meinel, #262333)


bzr 1.6 2008-08-25
##################

Finally, the long awaited bzr 1.6 has been released. This release includes
new features like Stacked Branches, improved weave merge, and an updated
server protocol (now on v3) which will allow for better cross version
compatibility. With this release we have deprecated Knit format
repositories, and recommend that users upgrade them, we will continue to
support reading and writing them for the forseeable future, but we will
not be tuning them for performance as pack repositories have proven to be
better at scaling. This will also be the first release to bundle
TortoiseBzr in the standalone Windows installer.


bzr 1.6rc5 2008-08-19
#####################

Bug Fixes
*********

* Disable automatic detection of stacking based on a containing
  directory of the target. It interacted badly with push, and needs a
  bit more work to get the edges polished before it should happen
  automatically. (John Arbash Meinel, #259275)
  (This change was reverted when merged to bzr.dev)


bzr 1.6rc4 2008-08-18
#####################

Bug Fixes
*********

* Fix a regression in knit => pack fetching.  We had a logic
  inversion, causing the fetch to insert fulltexts in random order,
  rather than preserving deltas.  (John Arbash Meinel, #256757)


bzr 1.6rc3 2008-08-14
#####################

Changes
*******

* Disable reading ``.bzrrules`` as a per-branch rule preferences
  file. The feature was not quite ready for a full release.
  (Robert Collins)

Improvements
************

* Update the windows installer to bundle TortoiseBzr and ``qbzr``
  into the standalone installer. This will be the first official
  windows release that installs Tortoise by default.
  (Mark Hammond)

Bug Fixes
*********

* Fix a regression in ``bzr+http`` support. There was a missing
  function (``_read_line``) that needed to be carried over from
  ``bzr+ssh`` support. (Andrew Bennetts)

* ``GraphIndex`` objects will internally read an entire index if more
  than 1/20th of their keyspace is requested in a single operation.
  This largely mitigates a performance regression in ``bzr log FILE``
  and completely corrects the performance regression in ``bzr log``.
  The regression was caused by removing an accomodation which had been
  supporting the index format in use. A newer index format is in
  development which is substantially faster. (Robert Collins)


bzr 1.6rc2 2008-08-13
#####################

This release candidate has a few minor bug fixes, and some regression
fixes for Windows.

Bug Fixes
*********

* ``bzr upgrade`` on remote branches accessed via bzr:// and
  bzr+ssh:// now works.  (Andrew Bennetts)

* Change the ``get_format_description()`` strings for
  ``RepositoryFormatKnitPack5`` et al to be single line messages.
  (Aaron Bentley)

* Fix for a regression on Win32 where we would try to call
  ``os.listdir()`` on a file and not catch the exception properly.
  (Windows raises a different exception.) This would manifest in
  places like ``bzr rm file`` or ``bzr switch``.
  (Mark Hammond, John Arbash Meinel)

* ``Inventory.copy()`` was failing to set the revision property for
  the root entry. (Jelmer Vernooij)

* sftp transport: added missing ``FileExists`` case to
  ``_translate_io_exception`` (Christophe Troestler, #123475)

* The help for ``bzr ignored`` now suggests ``bzr ls --ignored`` for
  scripting use. (Robert Collins, #3834)

* The default ``annotate`` logic will now always assign the
  last-modified value of a line to one of the revisions that modified
  it, rather than a merge revision. This would happen when both sides
  claimed to have modified the line resulting in the same text. The
  choice is arbitrary but stable, so merges in different directions
  will get the same results.  (John Arbash Meinel, #232188)


bzr 1.6rc1 2008-08-06
#####################

This release candidate for bzr 1.6 solidifies the new branch stacking
feature.  Bazaar now recommends that users upgrade all knit repositories,
because later formats are much faster.  However, we plan to continue read/write and
upgrade support for knit repostories for the forseeable future.  Several
other bugs and performance issues were fixed.

Changes
*******

* Knit format repositories are deprecated and bzr will now emit
  warnings whenever it encounters one.  Use ``bzr upgrade`` to upgrade
  knit repositories to pack format.  (Andrew Bennetts)

Improvements
************

* ``bzr check`` can now be told which elements at a location it should
  check.  (Daniel Watkins)

* Commit now supports ``--exclude`` (or ``-x``) to exclude some files
  from the commit. (Robert Collins, #3117)

* Fetching data between repositories that have the same model but no
  optimised fetcher will not reserialise all the revisions, increasing
  performance. (Robert Collins, John Arbash Meinel)

* Give a more specific error when target branch is not reachable.
  (James Westby)

* Implemented a custom ``walkdirs_utf8`` implementation for win32.
  This uses a pyrex extension to get direct access to the
  ``FindFirstFileW`` style apis, rather than using ``listdir`` +
  ``lstat``. Shows a very strong improvement in commands like
  ``status`` and ``diff`` which have to iterate the working tree.
  Anywhere from 2x-6x faster depending on the size of the tree (bigger
  trees, bigger benefit.) (John Arbash Meinel)

* New registry for log properties handles  and the method in
  LongLogFormatter to display the custom properties returned by the
  registered handlers. (Guillermo Gonzalez, #162469)

Bug Fixes
*********

* Add more tests that stacking does not create deltas spanning
  physical repository boundaries.
  (Martin Pool, #252428)

* Better message about incompatible repositories.
  (Martin Pool, #206258)

* ``bzr branch --stacked`` ensures the destination branch format can
  support stacking, even if the origin does not.
  (Martin Pool)

* ``bzr export`` no longer exports ``.bzrrules``.
  (Ian Clatworthy)

* ``bzr serve --directory=/`` now correctly allows the whole
  filesystem to be accessed on Windows, not just the root of the drive
  that Python is running from.
  (Adrian Wilkins, #240910)

* Deleting directories by hand before running ``bzr rm`` will not
  cause subsequent errors in ``bzr st`` and ``bzr commit``.
  (Robert Collins, #150438)

* Fix a test case that was failing if encoding wasn't UTF-8.
  (John Arbash Meinel, #247585)

* Fix "no buffer space available" error when branching with the new
  smart server protocol to or from Windows.
  (Andrew Bennetts, #246180)

* Fixed problem in branching from smart server.
  (#249256, Michael Hudson, Martin Pool)

* Handle a file turning in to a directory in TreeTransform.
  (James Westby, #248448)

API Changes
***********

* ``MutableTree.commit`` has an extra optional keywork parameter
  ``exclude`` that will be unconditionally supplied by the command
  line UI - plugins that add tree formats may need an update.
  (Robert Collins)

* The API minimum version for plugin compatibility has been raised to
  1.6 - there are significant changes throughout the code base.
  (Robert Collins)

* The generic fetch code now uses three attributes on Repository objects
  to control fetch. The streams requested are controlled via :
  ``_fetch_order`` and ``_fetch_uses_deltas``. Setting these
  appropriately allows different repository implementations to recieve
  data in their optimial form. If the ``_fetch_reconcile`` is set then
  a reconcile operation is triggered at the end of the fetch.
  (Robert Collins)

* The ``put_on_disk`` and ``get_tar_item`` methods in
  ``InventoryEntry`` were deprecated. (Ian Clatworthy)

* ``Repository.is_shared`` doesn't take a read lock. It didn't
  need one in the first place (nobody cached the value, and
  ``RemoteRepository`` wasn't taking one either). This saves a round
  trip when probing Pack repositories, as they read the ``pack-names``
  file when locked. And during probe, locking the repo isn't very
  useful. (John Arbash Meinel)

Internals
*********

* ``bzrlib.branchbuilder.BranchBuilder`` is now much more capable of
  putting together a real history without having to create a full
  WorkingTree. It is recommended that tests that are not directly
  testing the WorkingTree use BranchBuilder instead.  See
  ``BranchBuilder.build_snapshot`` or
  ``TestCaseWithMemoryTree.make_branch_builder``.  (John Arbash Meinel)

* ``bzrlib.builtins.internal_tree_files`` broken into two giving a new
  helper ``safe_relpath_files`` - used by the new ``exclude``
  parameter to commit. (Robert Collins)

* Make it easier to introduce new WorkingTree formats.
  (Ian Clatworthy)

* The code for exporting trees was refactored not to use the
  deprecated ``InventoryEntry`` methods. (Ian Clatworthy)

* RuleSearchers return () instead of [] now when there are no matches.
  (Ian Clatworthy)


bzr 1.6beta3 2008-07-17
#######################

This release adds a new 'stacked branches' feature allowing branches to
share storage without being in the same repository or on the same machine.
(See the user guide for more details.)  It also adds a new hook, improved
weaves, aliases for related locations, faster bzr+ssh push, and several
bug fixes.

Features
********

* New ``pre_change_branch_tip`` hook that is called before the
  branch tip is moved, while the branch is write-locked.  See the User
  Reference for signature details.  (Andrew Bennetts)

* Rule-based preferences can now be defined for selected files in
  selected branches, allowing commands and plugins to provide
  custom behaviour for files matching defined patterns.
  See ``Rule-based preferences`` (part of ``Configuring Bazaar``)
  in the User Guide and ``bzr help rules`` for more information.
  (Ian Clatworthy)

* Sites may suggest a branch to stack new branches on.  (Aaron Bentley)

* Stacked branches are now supported. See ``bzr help branch`` and
  ``bzr help push``.  Branches must be in the ``development1`` format
  to stack, though the stacked-on branch can be of any format.
  (Robert Collins)

Improvements
************

* ``bzr export --format=tgz --root=NAME -`` to export a gzipped tarball
  to stdout; also ``tar`` and ``tbz2``.
  (Martin Pool)

* ``bzr (re)merge --weave`` will now use a standard Weave algorithm,
  rather than the annotation-based merge it was using. It does so by
  building up a Weave of the important texts, without needing to build
  the full ancestry. (John Arbash Meinel, #238895)

* ``bzr send`` documents and better supports ``emacsclient`` (proper
  escaping of mail headers and handling of the MUA Mew).
  (Christophe Troestler)

* Remembered locations can be specified by aliases, e.g. :parent, :public,
  :submit.  (Aaron Bentley)

* The smart protocol now has improved support for setting branches'
  revision info directly.  This makes operations like push
  faster.  The new request method name is
  ``Branch.set_last_revision_ex``.  (Andrew Bennetts)

Bug Fixes
*********

* Bazaar is now able to be a client to the web server of IIS 6 and 7.
  The broken implementations of RFC822 in Python and RFC2046 in IIS
  combined with boundary-line checking in Bazaar previously made this
  impossible. (NB, IIS 5 does not suffer from this problem).
  (Adrian Wilkins, #247585)

* ``bzr log --long`` with a ghost in your mainline now handles that
  ghost properly. (John Arbash Meinel, #243536)

* ``check`` handles the split-up .bzr layout correctly, so no longer
  requires a branch to be present.
  (Daniel Watkins, #64783)

* Clearer message about how to set the PYTHONPATH if bzrlib can't be
  loaded.
  (Martin Pool, #205230)

* Errors about missing libraries are now shown without a traceback,
  and with a suggestion to install the library.  The full traceback is
  still in ``.bzr.log`` and can be shown with ``-Derror``.
  (Martin Pool, #240161)

* Fetch from a stacked branch copies all required data.
  (Aaron Bentley, #248506)

* Handle urls such as ftp://user@host.com@www.host.com where the user
  name contains an @.
  (Neil Martinsen-Burrell, #228058)

* ``needs_read_lock`` and ``needs_write_lock`` now suppress an error during
  ``unlock`` if there was an error in the original function. This helps
  most when there is a failure with a smart server action, since often the
  connection closes and we cannot unlock.
  (Andrew Bennetts, John Arbash Meinel, #125784)

* Obsolete hidden command ``bzr fetch`` removed.
  (Martin Pool, #172870)

* Raise the correct exception when doing ``-rbefore:0`` or ``-c0``.
  (John Arbash Meinel, #239933)

* You can now compare file revisions in Windows diff programs from
  Cygwin Bazaar.
  (Matt McClure, #209281)

* revision_history now tolerates mainline ghosts for Branch format 6.
  (Aaron Bentley, #235055)

* Set locale from environment for third party libs.
  (Martin von Gagern, #128496)

Documentation
*************

* Added *Using stacked branches* to the User Guide.
  (Ian Clatworthy)

* Updated developer documentation.
  (Martin Pool)

Testing
*******

* ``-Dmemory`` will cause /proc/PID/status to be catted before bzr
  exits, allowing low-key analysis of peak memory use. (Robert Collins)

* ``TestCaseWithTransport.make_branch_and_tree`` tries harder to return
  a tree with a ``branch`` attribute of the right format.  This was
  preventing some ``RemoteBranch`` tests from actually running with
  ``RemoteBranch`` instances.  (Andrew Bennetts)

API Changes
***********

* Removed ``Repository.text_store``, ``control_store``, etc.  Instead,
  there are new attributes ``texts, inventories, revisions,
  signatures``, each of which is a ``VersionedFiles``.  See the
  Repository docstring for more details.
  (Robert Collins)

* ``Branch.pull`` now accepts an ``_override_hook_target`` optional
  parameter.  If you have a subclass of ``Branch`` that overrides
  ``pull`` then you should add this parameter.  (Andrew Bennetts)

* ``bzrlib.check.check()`` has been deprecated in favour of the more
  aptly-named ``bzrlib.check.check_branch()``.
  (Daniel Watkins)

* ``Tree.print_file`` and ``Repository.print_file`` are deprecated.
  These methods are bad APIs because they write directly to sys.stdout.
  bzrlib does not use them internally, and there are no direct tests
  for them. (Alexander Belchenko)

Internals
*********

* ``cat`` command no longer uses ``Tree.print_file()`` internally.
  (Alexander Belchenko)

* New class method ``BzrDir.open_containing_tree_branch_or_repository``
  which eases the discovery of the tree, the branch and the repository
  containing a given location.
  (Daniel Watkins)

* New ``versionedfile.KeyMapper`` interface to abstract out the access to
  underlying .knit/.kndx etc files in repositories with partitioned
  storage. (Robert Collins)

* Obsolete developer-use command ``weave-join`` has been removed.
  (Robert Collins)

* ``RemoteToOtherFetcher`` and ``get_data_stream_for_search`` removed,
  to support new ``VersionedFiles`` layering.
  (Robert Collins)


bzr 1.6beta2 2008-06-10
#######################

This release contains further progress towards our 1.6 goals of shallow
repositories, and contains a fix for some user-affecting bugs in the
repository layer.  Building working trees during checkout and branch is
now faster.

Bug Fixes
*********

* Avoid KnitCorrupt error extracting inventories from some repositories.
  (The data is not corrupt; an internal check is detecting a problem
  reading from the repository.)
  (Martin Pool, Andrew Bennetts, Robert Collins, #234748)

* ``bzr status`` was breaking if you merged the same revision twice.
  (John Arbash Meinel, #235407)

* Fix infinite loop consuming 100% CPU when a connection is lost while
  reading a response body via the smart protocol v1 or v2.
  (Andrew Bennetts)

* Inserting a bundle which changes the contents of a file with no trailing
  end of line, causing a knit snapshot in a 'knits' repository will no longer
  cause KnitCorrupt. (Robert Collins)

* ``RemoteBranch.pull`` needs to return the ``self._real_branch``'s
  pull result. It was instead just returning None, which breaks ``bzr
  pull``. (John Arbash Meinel, #238149)

* Sanitize branch nick before using it as an attachment filename in
  ``bzr send``. (Lukáš Lalinský, #210218)

* Squash ``inv_entry.symlink_target`` to a plain string when
  generating DirState details. This prevents from getting a
  ``UnicodeError`` when you have symlinks and non-ascii filenames.
  (John Arbash Meinel, #135320)

Improvements
************

* Added the 'alias' command to set/unset and display aliases. (Tim Penhey)

* ``added``, ``modified``, and ``unknowns`` behaviour made consistent (all three
  now quote paths where required). Added ``--null`` option to ``added`` and
  ``modified`` (for null-separated unknowns, use ``ls --unknown --null``)
  (Adrian Wilkins)

* Faster branching (1.09x) and lightweight checkouts (1.06x) on large trees.
  (Ian Clatworthy, Aaron Bentley)

Documentation
*************

* Added *Bazaar Zen* section to the User Guide. (Ian Clatworthy)

Testing
*******

* Fix the test HTTPServer to be isolated from chdir calls made while it is
  running, allowing it to be used in blackbox tests. (Robert Collins)

API Changes
***********

* ``WorkingTree.set_parent_(ids/trees)`` will now filter out revisions
  which are in the ancestry of other revisions. So if you merge the same
  tree twice, or merge an ancestor of an existing merge, it will only
  record the newest. (If you merge a descendent, it will replace its
  ancestor). (John Arbash Meinel, #235407)

* ``RepositoryPolicy.__init__`` now requires stack_on and stack_on_pwd,
  through the derived classes do not.  (Aaron Bentley)

Internals
*********

* ``bzrlib.bzrdir.BzrDir.sprout`` now accepts ``stacked`` to control
  creating stacked branches. (Robert Collins)

* Knit record serialisation is now stricter on what it will accept, to
  guard against potential internal bugs, or broken input. (Robert Collins)

bzr 1.6beta1 2008-06-02
#######################


Commands that work on the revision history such as push, pull, missing,
uncommit and log are now substantially faster.  This release adds a
translation of some of the user documentation into Spanish.  (Contributions of
other translations would be very welcome.)  Bazaar 1.6beta1 adds a new network
protocol which is used by default and which allows for more efficient transfers
and future extensions.


Notes When Upgrading
********************

* There is a new version of the network protocol used for bzr://, bzr+ssh://
  and bzr+http:// connections.  This will allow more efficient requests and
  responses, and more graceful fallback when a server is too old to
  recognise a request from a more recent client.  Bazaar 1.6 will
  interoperate with 0.16 and later versions, but servers should be upgraded
  when possible.  Bazaar 1.6 no longer interoperates with 0.15 and earlier via
  these protocols.  Use alternatives like SFTP or upgrade those servers.
  (Andrew Bennetts, #83935)

Changes
*******

* Deprecation warnings will not be suppressed when running ``bzr selftest``
  so that developers can see if their code is using deprecated functions.
  (John Arbash Meinel)

Features
********

* Adding ``-Derror`` will now display a traceback when a plugin fails to
  load. (James Westby)

Improvements
************

* ``bzr branch/push/pull -r XXX`` now have a helper function for finding
  the revno of the new revision (``Graph.find_distance_to_null``). This
  should make something like ``bzr branch -r -100`` in a shared, no-trees
  repository much snappier. (John Arbash Meinel)

* ``bzr log --short -r X..Y`` no longer needs to access the full revision
  history. This makes it noticeably faster when logging the last few
  revisions. (John Arbash Meinel)

* ``bzr ls`` now accepts ``-V`` as an alias for ``--versioned``.
  (Jerad Cramp, #165086)

* ``bzr missing`` uses the new ``Graph.find_unique_ancestors`` and
  ``Graph.find_differences`` to determine missing revisions without having
  to search the whole ancestry. (John Arbash Meinel, #174625)

* ``bzr uncommit`` now uses partial history access, rather than always
  extracting the full revision history for a branch. This makes it
  resolve the appropriate revisions much faster (in testing it drops
  uncommit from 1.5s => 0.4s). It also means ``bzr log --short`` is one
  step closer to not using full revision history.
  (John Arbash Meinel, #172649)

Bugfixes
********

* ``bzr merge --lca`` should handle when two revisions have no common
  ancestor other than NULL_REVISION. (John Arbash Meinel, #235715)

* ``bzr status`` was breaking if you merged the same revision twice.
  (John Arbash Meinel, #235407)

* ``bzr push`` with both ``--overwrite`` and ``-r NNN`` options no longer
  fails.  (Andrew Bennetts, #234229)

* Correctly track the base URL of a smart medium when using bzr+http://
  URLs, which was causing spurious "No repository present" errors with
  branches in shared repositories accessed over bzr+http.
  (Andrew Bennetts, #230550)

* Define ``_remote_is_at_least_1_2`` on ``SmartClientMedium`` so that all
  implementations have the attribute.  Fixes 'PyCurlTransport' object has no
  attribute '_remote_is_at_least_1_2' attribute errors.
  (Andrew Bennetts, #220806)

* Failure to delete an obsolete pack file should just give a warning
  message, not a fatal error.  It may for example fail if the file is still
  in use by another process.
  (Martin Pool)

* Fix MemoryError during large fetches over HTTP by limiting the amount of
  data we try to read per ``recv`` call.  The problem was observed with
  Windows and a proxy, but might affect other environments as well.
  (Eric Holmberg, #215426)

* Handle old merge directives correctly in Merger.from_mergeable.  Stricter
  get_parent_map requirements exposed a latent bug here.  (Aaron Bentley)

* Issue a warning and ignore passwords declared in authentication.conf when
  used for an ssh scheme (sftp or bzr+ssh).
  (Vincent Ladeuil, #203186)

* Make both http implementations raise appropriate exceptions on 403
  Forbidden when POSTing smart requests.
  (Vincent Ladeuil, #230223)

* Properly *title* header names in http requests instead of capitalizing
  them.
  (Vincent Ladeuil, #229076)

* The "Unable to obtain lock" error message now also suggests using
  ``bzr break-lock`` to fix it.  (Martin Albisetti, #139202)

* Treat an encoding of '' as ascii; this can happen when bzr is run
  under vim on Mac OS X.
  (Neil Martinsen-Burrell)

* ``VersionedFile.make_mpdiffs()`` was raising an exception that wasn't in
  scope. (Daniel Fischer #235687)

Documentation
*************

* Added directory structure and started translation of docs in spanish.
  (Martin Albisetti, Lucio Albenga)

* Incorporate feedback from Jelmer Vernooij and Neil Martinsen-Burrell
  on the plugin and integration chapters of the User Guide.
  (Ian Clatworthy)

* More Bazaar developer documentation about packaging and release process,
  and about use of Python reprs.
  (Martin Pool, Martin Albisetti)

* Updated Tortise strategy document. (Mark Hammond)

Testing
*******

* ``bzrlib.tests.adapt_tests`` was broken and unused - it has been fixed.
  (Robert Collins)

* Fix the test HTTPServer to be isolated from chdir calls made while it is
  running, allowing it to be used in blackbox tests. (Robert Collins)

* New helper function for splitting test suites
  ``split_suite_by_condition``. (Robert Collins)

Internals
*********

* ``Branch.missing_revisions`` has been deprecated. Similar functionality
  can be obtained using ``bzrlib.missing.find_unmerged``. The api was
  fairly broken, and the function was unused, so we are getting rid of it.
  (John Arbash Meinel)

API Changes
***********

* ``Branch.abspath`` is deprecated; use the Tree or Transport
  instead.  (Martin Pool)

* ``Branch.update_revisions`` now takes an optional ``Graph``
  object. This can be used by ``update_revisions`` when it is
  checking ancestry, and allows callers to prefer request to go to a
  local branch.  (John Arbash Meinel)

* Branch, Repository, Tree and BzrDir should expose a Transport as an
  attribute if they have one, rather than having it indirectly accessible
  as ``.control_files._transport``.  This doesn't add a requirement
  to support a Transport in cases where it was not needed before;
  it just simplifies the way it is reached.  (Martin Pool)

* ``bzr missing --mine-only`` will return status code 0 if you have no
  new revisions, but the remote does. Similarly for ``--theirs-only``.
  The new code only checks one side, so it doesn't know if the other
  side has changes. This seems more accurate with the request anyway.
  It also changes the output to print '[This|Other] branch is up to
  date.' rather than displaying nothing.  (John Arbash Meinel)

* ``LockableFiles.put_utf8``, ``put_bytes`` and ``controlfilename``
  are now deprecated in favor of using Transport operations.
  (Martin Pool)

* Many methods on ``VersionedFile``, ``Repository`` and in
  ``bzrlib.revision``  deprecated before bzrlib 1.5 have been removed.
  (Robert Collins)

* ``RevisionSpec.wants_revision_history`` can be set to False for a given
  ``RevisionSpec``. This will disable the existing behavior of passing in
  the full revision history to ``self._match_on``. Useful for specs that
  don't actually need access to the full history. (John Arbash Meinel)

* The constructors of ``SmartClientMedium`` and its subclasses now require a
  ``base`` parameter.  ``SmartClientMedium`` implementations now also need
  to provide a ``remote_path_from_transport`` method.  (Andrew Bennetts)

* The default permissions for creating new files and directories
  should now be obtained from ``BzrDir._get_file_mode()`` and
  ``_get_dir_mode()``, rather than from LockableFiles.  The ``_set_file_mode``
  and ``_set_dir_mode`` variables on LockableFiles which were advertised
  as a way for plugins to control this are no longer consulted.
  (Martin Pool)

* ``VersionedFile.join`` is deprecated. This method required local
  instances of both versioned file objects and was thus hostile to being
  used for streaming from a smart server. The new get_record_stream and
  insert_record_stream are meant to efficiently replace this method.
  (Robert Collins)

* ``WorkingTree.set_parent_(ids/trees)`` will now filter out revisions
  which are in the ancestry of other revisions. So if you merge the same
  tree twice, or merge an ancestor of an existing merge, it will only
  record the newest. (If you merge a descendent, it will replace its
  ancestor). (John Arbash Meinel, #235407)

* ``WorkingTreeFormat2.stub_initialize_remote`` is now private.
  (Martin Pool)


bzr 1.5 2008-05-16
##################

This release of Bazaar includes several updates to the documentation, and fixes
to prepare for making rich root support the default format. Many bugs have been
squashed, including fixes to log, bzr+ssh inter-operation with older servers.

Changes
*******

* Suppress deprecation warnings when bzrlib is a 'final' release. This way
  users of packaged software won't be bothered with DeprecationWarnings,
  but developers and testers will still see them. (John Arbash Meinel)

Documentation
*************

* Incorporate feedback from Jelmer Vernooij and Neil Martinsen-Burrell
  on the plugin and integration chapters of the User Guide.
  (Ian Clatworthy)


bzr 1.5rc1 2008-05-09
#####################

Changes
*******

* Broader support of GNU Emacs mail clients. Set
  ``mail_client=emacsclient`` in your bazaar.conf and ``send`` will pop the
  bundle in a mail buffer according to the value of ``mail-user-agent``
  variable. (Xavier Maillard)

Improvements
************

* Diff now handles revision specs like "branch:" and "submit:" more
  efficiently.  (Aaron Bentley, #202928)

* More friendly error given when attempt to start the smart server
  on an address already in use. (Andrea Corbellini, #200575)

* Pull completes much faster when there is nothing to pull.
  (Aaron Bentley)

Bugfixes
********

* Authentication.conf can define sections without password.
  (Vincent Ladeuil, #199440)

* Avoid muttering every time a child update does not cause a progress bar
  update. (John Arbash Meinel, #213771)

* ``Branch.reconcile()`` is now implemented. This allows ``bzr reconcile``
  to fix when a Branch has a non-canonical mainline history. ``bzr check``
  also detects this condition. (John Arbash Meinel, #177855)

* ``bzr log -r ..X bzr://`` was failing, because it was getting a request
  for ``revision_id=None`` which was not a string.
  (John Arbash Meinel, #211661)

* ``bzr commit`` now works with Microsoft's FTP service.
  (Andreas Deininger)

* Catch definitions outside sections in authentication.conf.
  (Vincent Ladeuil, #217650)

* Conversion from non-rich-root to rich-root(-pack) updates inventory
  sha1s, even when bundles are used.  (Aaron Bentley, #181391)

* Conversion from non-rich-root to rich-root(-pack) works correctly even
  though search keys are not topologically sorted.  (Aaron Bentley)

* Conversion from non-rich-root to rich-root(-pack) works even when a
  parent revision has a different root id.  (Aaron Bentley, #177874)

* Disable strace testing until strace is fixed (see bug #103133) and emit a
  warning when selftest ends to remind us of leaking tests.
  (Vincent Ladeuil, #226769)

* Fetching all revisions from a repository does not cause pack collisions.
  (Robert Collins, Aaron Bentley, #212908)

* Fix error about "attempt to add line-delta in non-delta knit".
  (Andrew Bennetts, #217701)

* Pushing a branch in "dirstate" format (Branch5) over bzr+ssh would break
  if the remote server was < version 1.2. This was due to a bug in the
  RemoteRepository.get_parent_map() fallback code.
  (John Arbash Meinel, #214894)

* Remove leftover code in ``bzr_branch`` that inappropriately creates
  a ``branch-name`` file in the branch control directory.
  (Martin Pool)

* Set SO_REUSEADDR on server sockets of ``bzr serve`` to avoid problems
  rebinding the socket when starting the server a second time.
  (John Arbash Meinel, Martin Pool, #164288)

* Severe performance degradation in fetching from knit repositories to
  knits and packs due to parsing the entire revisions.kndx on every graph
  walk iteration fixed by using the Repository.get_graph API.  There was
  another regression in knit => knit fetching which re-read the index for
  every revision each side had in common.
  (Robert Collins, John Arbash Meinel)

* When logging the changes to a particular file, there was a bug if there
  were ghosts in the revision ancestry. (John Arbash Meinel, #209948)

* xs4all's ftp server returns a temporary error when trying to list an
  empty directory, rather than returning an empty list. Adding a
  workaround so that we don't get spurious failures.
  (John Arbash Meinel, #215522)

Documentation
*************

* Expanded the User Guide to include new chapters on popular plugins and
  integrating Bazaar into your environment. The *Best practices* chapter
  was renamed to *Miscellaneous topics* as suggested by community
  feedback as well. (Ian Clatworthy)

* Document outlining strategies for TortoiseBzr. (Mark Hammond)

* Improved the documentation on hooks. (Ian Clatworthy)

* Update authentication docs regarding ssh agents.
  (Vincent Ladeuil, #183705)

Testing
*******

* Add ``thread_name_suffix`` parameter to SmartTCPServer_for_testing, to
  make it easy to identify which test spawned a thread with an unhandled
  exception. (Andrew Bennetts)

* New ``--debugflag``/``-E`` option to ``bzr selftest`` for setting
  options for debugging tests, these are complementary to the the -D
  options.  The ``-Dselftest_debug`` global option has been replaced by the
  ``-E=allow_debug`` option for selftest. (Andrew Bennetts)

* Parameterised test ids are preserved correctly to aid diagnosis of test
  failures. (Robert Collins, Andrew Bennetts)

* selftest now accepts --starting-with <id> to load only the tests whose id
  starts with the one specified. This greatly speeds up running the test
  suite on a limited set of tests and can be used to run the tests for a
  single module, a single class or even a single test.  (Vincent Ladeuil)

* The test suite modules have been modified to define load_tests() instead
  of test_suite(). That speeds up selective loading (via --load-list)
  significantly and provides many examples on how to migrate (grep for
  load_tests).  (Vincent Ladeuil)

Internals
*********

* ``Hooks.install_hook`` is now deprecated in favour of
  ``Hooks.install_named_hook`` which adds a required ``name`` parameter, to
  avoid having to call ``Hooks.name_hook``. (Daniel Watkins)

* Implement xml8 serializer.  (Aaron Bentley)

* New form ``@deprecated_method(deprecated_in(1, 5, 0))`` for making
  deprecation wrappers.  (Martin Pool)

* ``Repository.revision_parents`` is now deprecated in favour of
  ``Repository.get_parent_map([revid])[revid]``. (Jelmer Vernooij)

* The Python ``assert`` statement is no longer used in Bazaar source, and
  a test checks this.  (Martin Pool)

API Changes
***********

* ``bzrlib.status.show_pending_merges`` requires the repository to be
  locked by the caller. Callers should have been doing it anyway, but it
  will now raise an exception if they do not. (John Arbash Meinel)

* Repository.get_data_stream, Repository.get_data_stream_for_search(),
  Repository.get_deltas_for_revsions(), Repository.revision_trees(),
  Repository.item_keys_introduced_by() no longer take read locks.
  (Aaron Bentley)

* ``LockableFiles.get_utf8`` and ``.get`` are deprecated, as a start
  towards removing LockableFiles and ``.control_files`` entirely.
  (Martin Pool)

* Methods deprecated prior to 1.1 have been removed.
  (Martin Pool)


bzr 1.4 2008-04-28
##################

This release of Bazaar includes handy improvements to the speed of log and
status, new options for several commands, improved documentation, and better
hooks, including initial code for server-side hooks.  A number of bugs have
been fixed, particularly in interoperability between different formats or
different releases of Bazaar over there network.  There's been substantial
internal work in both the repository and network code to enable new features
and faster performance.

Bug Fixes
*********

* Pushing a branch in "dirstate" format (Branch5) over bzr+ssh would break
  if the remote server was < version 1.2.  This was due to a bug in the
  RemoteRepository.get_parent_map() fallback code.
  (John Arbash Meinel, Andrew Bennetts, #214894)


bzr 1.4rc2 2008-04-21
#####################

Bug Fixes
*********

* ``bzr log -r ..X bzr://`` was failing, because it was getting a request
  for ``revision_id=None`` which was not a string.
  (John Arbash Meinel, #211661)

* Fixed a bug in handling ghost revisions when logging changes in a
  particular file.  (John Arbash Meinel, #209948)

* Fix error about "attempt to add line-delta in non-delta knit".
  (Andrew Bennetts, #205156)

* Fixed performance degradation in fetching from knit repositories to
  knits and packs due to parsing the entire revisions.kndx on every graph
  walk iteration fixed by using the Repository.get_graph API.  There was
  another regression in knit => knit fetching which re-read the index for
  every revision each side had in common.
  (Robert Collins, John Arbash Meinel)


bzr 1.4rc1 2008-04-11
#####################

Changes
*******

* bzr main script cannot be imported (Benjamin Peterson)

* On Linux bzr additionally looks for plugins in arch-independent site
  directory. (Toshio Kuratomi)

* The ``set_rh`` branch hook is now deprecated. Please migrate
  any plugins using this hook to use an alternative, e.g.
  ``post_change_branch_tip``. (Ian Clatworthy)

* When a plugin cannot be loaded as the file path is not a valid
  python module name bzr will now strip a ``bzr_`` prefix from the
  front of the suggested name, as many plugins (e.g. bzr-svn)
  want to be installed without this prefix. It is a common mistake
  to have a folder named "bzr-svn" for that plugin, especially
  as this is what bzr branch lp:bzr-svn will give you. (James Westby,
  Andrew Cowie)

* UniqueIntegerBugTracker now appends bug-ids instead of joining
  them to the base URL. Plugins that register bug trackers may
  need a trailing / added to the base URL if one is not already there.
  (James Wesby, Andrew Cowie)

Features
********

* Added start_commit hook for mutable trees. (Jelmer Vernooij, #186422)

* ``status`` now accepts ``--no-pending`` to show the status without
  listing pending merges, which speeds up the command a lot on large
  histories.  (James Westby, #202830)

* New ``post_change_branch_tip`` hook that is called after the
  branch tip is moved but while the branch is still write-locked.
  See the User Reference for signature details.
  (Ian Clatworthy, James Henstridge)

* Reconfigure can convert a branch to be standalone or to use a shared
  repository.  (Aaron Bentley)

Improvements
************

* The smart protocol now has support for setting branches' revision info
  directly.  This should make operations like push slightly faster, and is a
  step towards server-side hooks.  The new request method name is
  ``Branch.set_last_revision_info``.  (Andrew Bennetts)

* ``bzr commit --fixes`` now recognises "gnome" as a tag by default.
  (James Westby, Andrew Cowie)

* ``bzr switch`` will attempt to find branches to switch to relative to the
  current branch. E.g. ``bzr switch branchname`` will look for
  ``current_branch/../branchname``. (Robert Collins, Jelmer Vernooij,
  Wouter van Heyst)

* Diff is now more specific about execute-bit changes it describes
  (Chad Miller)

* Fetching data over HTTP is a bit faster when urllib is used.  This is done
  by forcing it to recv 64k at a time when reading lines in HTTP headers,
  rather than just 1 byte at a time.  (Andrew Bennetts)

* Log --short and --line are much faster when -r is not specified.
  (Aaron Bentley)

* Merge is faster.  We no longer check a file's existence unnecessarily
  when merging the execute bit.  (Aaron Bentley)

* ``bzr status`` on an explicit list of files no longer shows pending
  merges, making it much faster on large trees. (John Arbash Meinel)

* The launchpad directory service now warns the user if they have not set
  their launchpad login and are trying to resolve a URL using it, just
  in case they want to do a write operation with it.  (James Westby)

* The smart protocol client is slightly faster, because it now only queries
  the server for the protocol version once per connection.  Also, the HTTP
  transport will now automatically probe for and use a smart server if
  one is present.  You can use the new ``nosmart+`` transport decorator
  to get the old behaviour.  (Andrew Bennetts)

* The ``version`` command takes a ``--short`` option to print just the
  version number, for easier use in scripts.  (Martin Pool)

* Various operations with revision specs and commands that calculate
  revnos and revision ids are faster.  (John A. Meinel, Aaron Bentley)

Bugfixes
********

* Add ``root_client_path`` parameter to SmartWSGIApp and
  SmartServerRequest.  This makes it possible to publish filesystem
  locations that don't exactly match URL paths. SmartServerRequest
  subclasses should use the new ``translate_client_path`` and
  ``transport_from_client_path`` methods when dealing with paths received
  from a client to take this into account.  (Andrew Bennetts, #124089)

* ``bzr mv a b`` can be now used also to rename previously renamed
  directories, not only files. (Lukáš Lalinský, #107967)

* ``bzr uncommit --local`` can now remove revisions from the local
  branch to be symmetric with ``bzr commit --local``.
  (John Arbash Meinel, #93412)

* Don't ask for a password if there is no real terminal.
  (Alexander Belchenko, #69851)

* Fix a bug causing a ValueError crash in ``parse_line_delta_iter`` when
  fetching revisions from a knit to pack repository or vice versa using
  bzr:// (including over http or ssh).
  (#208418, Andrew Bennetts, Martin Pool, Robert Collins)

* Fixed ``_get_line`` in ``bzrlib.smart.medium``, which was buggy.  Also
  fixed ``_get_bytes`` in the same module to use the push back buffer.
  These bugs had no known impact in normal use, but were problematic for
  developers working on the code, and were likely to cause real bugs sooner
  or later.  (Andrew Bennetts)

* Implement handling of basename parameter for DefaultMail.  (James Westby)

* Incompatibility with Paramiko versions newer than 1.7.2 was fixed.
  (Andrew Bennetts, #213425)

* Launchpad locations (lp: URLs) can be pulled.  (Aaron Bentley, #181945)

* Merges that add files to deleted root directories complete.  They
  do create conflicts.  (Aaron Bentley, #210092)

* vsftp's return ``550 RNFR command failed.`` supported.
  (Marcus Trautwig, #129786)

Documentation
*************

* Improved documentation on send/merge relationship. (Peter Schuller)

* Minor fixes to the User Guide. (Matthew Fuller)

* Reduced the evangelism in the User Guide. (Ian Clatworthy)

* Added Integrating with Bazaar document for developers (Martin Albisetti)

API Breaks
**********

* Attempting to pull data from a ghost aware repository (e.g. knits) into a
  non-ghost aware repository such as weaves will now fail if there are
  ghosts.  (Robert Collins)

* ``KnitVersionedFile`` no longer accepts an ``access_mode`` parameter, and
  now requires the ``index`` and ``access_method`` parameters to be
  supplied. A compatible shim has been kept in the new function
  ``knit.make_file_knit``. (Robert Collins)

* Log formatters must now provide log_revision instead of show and
  show_merge_revno methods. The latter had been deprecated since the 0.17
  release. (James Westby)

* ``LoopbackSFTP`` is now called ``SocketAsChannelAdapter``.
  (Andrew Bennetts)

* ``osutils.backup_file`` is removed. (Alexander Belchenko)

* ``Repository.get_revision_graph`` is deprecated, with no replacement
  method. The method was size(history) and not desirable. (Robert Collins)

* ``revision.revision_graph`` is deprecated, with no replacement function.
  The function was size(history) and not desirable. (Robert Collins)

* ``Transport.get_shared_medium`` is deprecated.  Use
  ``Transport.get_smart_medium`` instead.  (Andrew Bennetts)

* ``VersionedFile`` factories now accept a get_scope parameter rather
  than using a call to ``transaction_finished``, allowing the removal of
  the fixed list of versioned files per repository. (Robert Collins)

* ``VersionedFile.annotate_iter`` is deprecated. While in principle this
  allowed lower memory use, all users of annotations wanted full file
  annotations, and there is no storage format suitable for incremental
  line-by-line annotation. (Robert Collins)

* ``VersionedFile.clone_text`` is deprecated. This performance optimisation
  is no longer used - reading the content of a file that is undergoing a
  file level merge to identical state on two branches is rare enough, and
  not expensive enough to special case. (Robert Collins)

* ``VersionedFile.clear_cache`` and ``enable_cache`` are deprecated.
  These methods added significant complexity to the ``VersionedFile``
  implementation, but were only used for optimising fetches from knits -
  which can be done from outside the knit layer, or via a caching
  decorator. As knits are not the default format, the complexity is no
  longer worth paying. (Robert Collins)

* ``VersionedFile.create_empty`` is removed. This method presupposed a
  sensible mapping to a transport for individual files, but pack backed
  versioned files have no such mapping. (Robert Collins)

* ``VersionedFile.get_graph`` is deprecated, with no replacement method.
  The method was size(history) and not desirable. (Robert Collins)

* ``VersionedFile.get_graph_with_ghosts`` is deprecated, with no
  replacement method.  The method was size(history) and not desirable.
  (Robert Collins)

* ``VersionedFile.get_parents`` is deprecated, please use
  ``VersionedFile.get_parent_map``. (Robert Collins)

* ``VersionedFile.get_sha1`` is deprecated, please use
  ``VersionedFile.get_sha1s``. (Robert Collins)

* ``VersionedFile.has_ghost`` is now deprecated, as it is both expensive
  and unused outside of a single test. (Robert Collins)

* ``VersionedFile.iter_parents`` is now deprecated in favour of
  ``get_parent_map`` which can be used to instantiate a Graph on a
  VersionedFile. (Robert Collins)

* ``VersionedFileStore`` no longer uses the transaction parameter given
  to most methods; amongst other things this means that the
  get_weave_or_empty method no longer guarantees errors on a missing weave
  in a readonly transaction, and no longer caches versioned file instances
  which reduces memory pressure (but requires more careful management by
  callers to preserve performance). (Robert Collins)

Testing
*******

* New -Dselftest_debug flag disables clearing of the debug flags during
  tests.  This is useful if you want to use e.g. -Dhpss to help debug a
  failing test.  Be aware that using this feature is likely to cause
  spurious test failures if used with the full suite. (Andrew Bennetts)

* selftest --load-list now uses a new more agressive test loader that will
  avoid loading unneeded modules and building their tests. Plugins can use
  this new loader by defining a load_tests function instead of a test_suite
  function. (a forthcoming patch will provide many examples on how to
  implement this).
  (Vincent Ladeuil)

* selftest --load-list now does some sanity checks regarding duplicate test
  IDs and tests present in the list but not found in the actual test suite.
  (Vincent Ladeuil)

* Slightly more concise format for the selftest progress bar, so there's
  more space to show the test name.  (Martin Pool) ::

    [2500/10884, 1fail, 3miss in 1m29s] test_revisionnamespaces.TestRev

* The test suite takes much less memory to run, and is a bit faster.  This
  is done by clearing most attributes of TestCases after running them, if