~bzr-pqm/bzr/bzr.dev

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

.. toctree::
   :maxdepth: 1

bzr 2.0.6
#########

:2.0.6: 2010-09-17

The sixth release in our 2.0 series addresses several user-inconvenience
bugs.  None are critical, but upgrading is recommended for all users on
earlier 2.0 releases.

Bug Fixes
*********

* Additional merges after an unrelated branch has been merged with its
  history no longer crash when deleted files are involved.
  (Vincent Ladeuil, John Arbash Meinel, #375898)

* ``bzr add SYMLINK/FILE`` now works properly when the symlink points to a
  previously-unversioned directory within the tree: the directory is
  marked versioned too.  
  (Martin Pool, #192859)

* ``bzr commit SYMLINK`` now works, rather than trying to commit the
  target of the symlink.
  (Martin Pool, John Arbash Meinel, #128562)

* ``bzr revert`` now only takes write lock on working tree, instead of on 
  both working tree and branch.
  (Danny van Heumen, #498409)

* ``bzr upgrade`` now creates the ``backup.bzr`` directory with the same
  permissions as ``.bzr`` directory on a POSIX OS.
  (Parth Malwankar, #262450)

* Don't traceback trying to unversion children files of an already
  unversioned directory.  (Vincent Ladeuil, #494221)

* Don't traceback when a lockdir's ``held/info`` file is corrupt (e.g.
  contains only NUL bytes).  Instead warn the user, and allow ``bzr
  break-lock`` to remove it.  (Andrew Bennetts, #619872)
  
* Fix ``AttributeError on parent.children`` when adding a file under a 
  directory that was a symlink in the previous commit.
  (Martin Pool, #192859)

* Prevent ``CHKMap.apply_delta`` from generating non-canonical CHK maps,
  which can result in "missing referenced chk root keys" errors when
  fetching from repositories with affected revisions.
  (Andrew Bennetts, #522637)

* Raise ValueError instead of a string exception.
  (John Arbash Meinel, #586926)

* Reduce peak memory by one copy of compressed text.
  (John Arbash Meinel, #566940)

* Repositories accessed via a smart server now reject being stacked on a
  repository in an incompatible format, as is the case when accessing them
  via other methods.  This was causing fetches from those repositories via
  a smart server (e.g. using ``bzr branch``) to receive invalid data.
  (Andrew Bennetts, #562380)

* Selftest with versions of subunit that support ``stopTestRun`` will no longer
  error. This error was caused by 2.0 not being updated when upstream
  python merged the end of run patch, which chose ``stopTestRun`` rather than
  ``done``. (Robert Collins, #571437)

* When passing a file to ``UTF8DirReader`` make sure to close the current
  directory file handle after the chdir fails. Otherwise when passing many
  filenames into a command line ``bzr status`` we would leak descriptors.
  (John Arbash Meinel, #583486)


Testing
*******

* ``build_tree_contents`` can create symlinks.
  (Martin Pool, John Arbash Meinel)


bzr 2.0.5
#########

:2.0.5: 2010-03-23

This fifth release in our 2.0 series addresses several user-inconvenience
bugs.  None are critical, but upgrading is recommended for all users on
earlier 2.0 releases.

Bug Fixes
*********

* Avoid ``malloc(0)`` in ``patiencediff``, which is non-portable.
  (Martin Pool, #331095)

* Concurrent autopacking is more resilient to already-renamed pack files.
  If we find that a file we are about to obsolete is already obsoleted, we
  do not try to rename it, and we leave the file in ``obsolete_packs``.
  The code is also fault tolerant if a file goes missing, assuming that
  another process already removed the file.
  (John Arbash Meinel, Gareth White, #507557)

* Cope with the lockdir ``held/info`` file being empty, which seems to
  happen fairly often if the process is suddenly interrupted while taking
  a lock.
  (Martin Pool, #185103)

* Give the warning about potentially slow cross-format fetches much
  earlier on in the fetch operation.  Don't show this message during
  upgrades, and show the correct format indication for remote
  repositories.
  (Martin Pool, #456077, #515356, #513157)

* Handle renames correctly when there are files or directories that 
  differ only in case.  (Chris Jones, Martin Pool, #368931)

* If ``bzr push --create-prefix`` triggers an unexpected ``NoSuchFile``
  error, report that error rather than failing with an unhelpful
  ``UnboundLocalError``.
  (Andrew Bennetts, #423563)

* Running ``bzr`` command without any arguments now shows bzr
  version number along with rest of the help text.
  (Parth Malwankar, #369501)

* Use osutils.O_NOINHERIT for some files on win32 to avoid PermissionDenied
  errors.
  (Inada Naoki, #524560)

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

* Added ``location-alias`` help topic.
  (Andrew Bennetts, #337834)

* Fixed CHM generation by moving the NEWS section template into
  a separate file. (Ian Clatworthy, #524184)


bzr 2.0.4
#########

:Codename: smooth sailing
:2.0.4: 2010-01-21

The fourth bugfix-only release in the 2.0 series contains more than a
dozen bugfixes relative to 2.0.3. The primary focus is on handling
interruptions and concurrent operations more cleanly, there is also a fair
improvement to ``bzr export`` when exporting a remote branch.


Bug Fixes
*********

* ``bzr annotate`` on another branch with ``-r branch:...`` no longer
  fails with an ``ObjectNotLocked`` error.  (Andrew Bennetts, #496590)

* ``bzr export dir`` now requests all file content as a record stream,
  rather than requsting the file content one file-at-a-time. This can make
  exporting over the network significantly faster (54min => 9min in one
  case). (John Arbash Meinel, #343218)

* ``bzr serve`` no longer slowly leaks memory. The compiled
  ``bzrlib.bencode.Encoder()`` class was using ``__del__`` to cleanup and
  free resources, and it should have been using ``__dealloc__``.
  This will likely have an impact on any other process that is serving for
  an extended period of time.  (John Arbash Meinel, #494406)

* Check for SIGINT (Ctrl-C) and other signals immediately if ``readdir``
  returns ``EINTR`` by calling ``PyErr_CheckSignals``.  This affected the
  optional ``_readdir_pyx`` extension.  (Andrew Bennetts, #495023)

* Concurrent autopacks will no longer lose a newly created pack file.
  There was a race condition, where if the reload happened at the right
  time, the second packer would forget the name of the newly added pack
  file. (John Arbash Meinel, Gareth White, #507566)

* Give a clearer message if the lockdir disappears after being apparently
  successfully taken.  (Martin Pool, #498378)

* Give a warning when fetching between repositories (local or remote) with
  sufficiently different formats that the content will need to be
  serialized (ie ``InterDifferingSerializer`` or ``inventory-deltas``), so
  the user has a clue that upgrading could make it faster.
  (Martin Pool, #456077)

* If we fail to open ``~/.bzr.log`` write a clear message to stderr rather
  than using ``warning()``. The log file is opened before logging is set
  up, and it leads to very confusing: 'no handlers for "bzr"' messages for
  users, rather than something nicer.
  (John Arbash Meinel, Barry Warsaw, #503886)

* Refuse to build with any Pyrex 0.9.4 release, as they have known bugs.
  (Martin Pool, John Arbash Meinel, #449372)

* ``setup.py bdist_rpm`` now properly finds extra files needed for the
  build. (there is still the distutils bug
  http://bugs.python.org/issue644744) (Joe Julian, #175839)

* The 2a format wasn't properly restarting autopacks when something
  changed underneath it (like another autopack). Now concurrent
  autopackers will properly succeed. (John Arbash Meinel, #495000)

* ``TreeTransform`` can now handle when a delta says that the file id for
  the tree root changes. Rather than trying to rename your working
  directory, or failing early saying that you can't have multiple
  tree roots. This also fixes revert, update, and pull when the root id
  changes.  (John Arbash Meinel, #494269, #504390)

* ``_update_current_block`` no longer suppresses exceptions, so ^C at just
  the right time will get propagated, rather than silently failing to move
  the block pointer. (John Arbash Meinel, Gareth White, #495023)

Testing
*******

* We have a new ``test_source`` that ensures all pyrex ``cdef`` functions
  handle exceptions somehow. (Possibly by setting ``# cannot_raise``
  rather than an ``except ?:`` clause.) This should help prevent bugs like
  bug #495023. (John Arbash Meinel)


bzr 2.0.3
#########

:Codename: little italy
:2.0.3: 2009-12-14


The third stable release of Bazaar has a small handful of bugfixes. As
expected, this has no internal or external compatibility changes versus
2.0.2 (or 2.0.0).

Bug Fixes
*********

* ``bzr push --use-existing-dir`` no longer crashes if the directory
  exists but contains an invalid ``.bzr`` directory.
  (Andrew Bennetts, #423563)

* Content filters are now applied correctly after pull, merge and switch.
  (Ian Clatworthy, #385879)

* Fix a potential segfault in the groupcompress hash map handling code.
  When inserting new entries, if the final hash bucket was empty, we could
  end up trying to access if ``(last_entry+1)->ptr == NULL``.
  (John Arbash Meinel, #490228)

* Improve "Binary files differ" hunk handling.  (Aaron Bentley, #436325)


bzr 2.0.2
#########

:Codename: after the scare
:2.0.2: 2009-11-02

The second in our "let's keep the stable bugfixes flowing" series. As
expected this has a few (~9) bugfixes relative to 2.0.1, and no major api
changes or features.

Bug Fixes
*********

* Avoid "NoneType has no attribute st_mode" error when files disappear
  from a directory while it's being read.  (Martin Pool, #446033)

* Content filters are now applied correctly after revert.
  (Ian Clatworthy)

* Diff parsing handles "Binary files differ" hunks.  (Aaron Bentley, #436325)

* Fetching from stacked pre-2a repository via a smart server no longer
  fails intermittently with "second push failed to complete".
  (Andrew Bennetts, #437626)

* Fix typos left after test_selftest refactoring.
  (Vincent Ladeuil, Matt Nordhoff, #461149)

* Fixed ``ObjectNotLocked`` errors during ``bzr log -r NNN somefile``.
  (Andrew Bennetts, #445171)
  
* PreviewTree file names are not limited by the encoding of the temp
  directory's filesystem. (Aaron Bentley, #436794)

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

* ``bzr log`` now read-locks branches exactly once, so makes better use of
  data caches.  (Andrew Bennetts)

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

* Filtered views user documentation upgraded to refer to format 2a
  instead of pre-2.0 formats. (Ian Clatworthy)


bzr 2.0.1
#########

:Codename: Stability First
:2.0.1: 2009-10-14

The first of our new ongoing bugfix-only stable releases has arrived. It
includes a collection of 12 bugfixes applied to bzr 2.0.0, but does not
include any of the feature development in the 2.1.0 series.


Bug Fixes
*********

* ``bzr add`` in a tree that has files with ``\r`` or ``\n`` in the
  filename will issue a warning and skip over those files.
  (Robert Collins, #3918)

* bzr will attempt to authenticate with SSH servers that support
  ``keyboard-interactive`` auth but not ``password`` auth when using
  Paramiko.   (Andrew Bennetts, #433846)

* Fixed fetches from a stacked branch on a smart server that were failing
  with some combinations of remote and local formats.  This was causing
  "unknown object type identifier 60" errors.  (Andrew Bennetts, #427736)

* Fixed ``ObjectNotLocked`` errors when doing some log and diff operations
  on branches via a smart server.  (Andrew Bennetts, #389413)

* Handle things like ``bzr add foo`` and ``bzr rm foo`` when the tree is
  at the root of a drive. ``osutils._cicp_canonical_relpath`` always
  assumed that ``abspath()`` returned a path that did not have a trailing
  ``/``, but that is not true when working at the root of the filesystem.
  (John Arbash Meinel, Jason Spashett, #322807)

* Hide deprecation warnings for 'final' releases for python2.6.
  (John Arbash Meinel, #440062)

* Improve the time for ``bzr log DIR`` for 2a format repositories.
  We had been using the same code path as for <2a formats, which required
  iterating over all objects in all revisions.
  (John Arbash Meinel, #374730)

* Make sure that we unlock the tree if we fail to create a TreeTransform
  object when doing a merge, and there is limbo, or pending-deletions
  directory.  (Gary van der Merwe, #427773)

* Occasional IndexError on renamed files have been fixed. Operations that
  set a full inventory in the working tree will now go via the
  apply_inventory_delta code path which is simpler and easier to
  understand than dirstates set_state_from_inventory method. This may
  have a small performance impact on operations built on _write_inventory,
  but such operations are already doing full tree scans, so no radical
  performance change should be observed. (Robert Collins, #403322)

* Retrieving file text or mtime from a _PreviewTree has good performance when
  there are many changes.  (Aaron Bentley)

* The CHK index pages now use an unlimited cache size. With a limited
  cache and a large project, the random access of chk pages could cause us
  to download the entire cix file many times.
  (John Arbash Meinel, #402623)

* When a file kind becomes unversionable after being added, a sensible
  error will be shown instead of a traceback. (Robert Collins, #438569)

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

* Improved README. (Ian Clatworthy)

* Improved upgrade documentation for Launchpad branches.
  (Barry Warsaw)


bzr 2.0.0
#########

:2.0.0: 2009-09-22
:Codename: Instant Karma

This release of Bazaar makes the 2a (previously 'brisbane-core') format
the default when new branches or repositories are created.  This format is
substantially smaller and faster for many operations.  Most of the work in
this release focuses on bug fixes and stabilization, covering both 2a and
previous formats.  (See the Upgrade Guide for information on migrating
existing projects.)

This release also improves the documentation content and presentation,
including adding Windows HtmlHelp manuals.

The Bazaar team decided that 2.0 will be a long-term supported release,
with bugfix-only 2.0.x releases based on it, continuing for at least six
months or until the following stable release.

Changes from 2.0.0rc2 to final
******************************

* Officially branded as 2.0.0 rather than 2.0 to clarify between things
  that "want to happen on the 2.0.x stable series" versus things that want
  to "land in 2.0.0". (Changes how bzrlib._format_version_tuple() handles
  micro = 0.) (John Arbash Meinel)


bzr 2.0.0rc2
############

:2.0.0rc2: 2009-09-10

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

* Added post_commit hook for mutable trees. This allows the keywords
  plugin to expand keywords on files changed by the commit.
  (Ian Clatworthy, #408841)

Bug Fixes
*********

* Bazaar's native protocol code now correctly handles EINTR, which most
  noticeably occurs if you break in to the debugger while connected to a
  bzr+ssh server.  You can now can continue from the debugger (by typing
  'c') and the process continues.  However, note that pressing C-\ in the
  shell may still kill the SSH process, which is bug 162509, so you must
  sent a signal to the bzr process specifically, for example by typing
  ``kill -QUIT PID`` in another shell.  (Martin Pool, #341535)

* ``bzr check`` in pack-0.92, 1.6 and 1.9 format repositories will no
  longer report incorrect errors about ``Missing inventory ('TREE_ROOT', ...)``
  (Robert Collins, #416732)

* ``bzr info -v`` on a 2a format still claimed that it was a "Development
  format" (John Arbash Meinel, #424392)

* ``bzr log stacked-branch`` shows the full log including
  revisions that are in the fallback repository. (Regressed in 2.0rc1).
  (John Arbash Meinel, #419241)

* Clearer message when Bazaar runs out of memory, instead of a ``MemoryError``
  traceback.  (Martin Pool, #109115)

* Conversion to 2a will create a single pack for all the new revisions (as
  long as it ran without interruption). This improves both ``bzr upgrade``
  and ``bzr pull`` or ``bzr merge`` from local branches in older formats.
  The autopack logic that occurs every 100 revisions during local
  conversions was not returning that pack's identifier, which resulted in
  the partial packs created during the conversion not being consolidated
  at the end of the conversion process. (Robert Collins, #423818)

* Fetches from 2a to 2a are now again requested in 'groupcompress' order.
  Groups that are seen as 'underutilized' will be repacked on-the-fly.
  This means that when the source is fully packed, there is minimal
  overhead during the fetch, but if the source is poorly packed the result
  is a fairly well packed repository (not as good as 'bzr pack' but
  good-enough.) (Robert Collins, John Arbash Meinel, #402652)

* Fix a potential segmentation fault when doing 'log' of a branch that had
  ghosts in its mainline.  (Evaluating None as a tuple is bad.)
  (John Arbash Meinel, #419241)

* ``groupcompress`` sort order is now more stable, rather than relying on
  ``topo_sort`` ordering. The implementation is now
  ``KnownGraph.gc_sort``. (John Arbash Meinel)

* Local data conversion will generate correct deltas. This is a critical
  bugfix vs 2.0rc1, and all 2.0rc1 users should upgrade to 2.0rc2 before
  converting repositories. (Robert Collins, #422849)

* Network streams now decode adjacent records of the same type into a
  single stream, reducing layering churn. (Robert Collins)

* Prevent some kinds of incomplete data from being committed to a 2a
  repository, such as revisions without inventories, a missing chk_bytes
  record for an inventory, or a missing text referenced by an inventory.
  (Andrew Bennetts, #423506, #406687)
  
Documentation
*************

* Fix assertion error about "_remember_remote_is_before" when pushing to
  older smart servers.
  (Andrew Bennetts, #418931)

* Help on hooks no longer says 'Not deprecated' for hooks that are
  currently supported. (Ian Clatworthy, #422415)

* PDF and CHM (Windows HtmlHelp) formats are now supported for the
  user documentation. The HTML documentation is better broken up into
  topics. (Ian Clatworthy)

* The developer and foreign language documents are now separated
  out so that searching in the HTML and CHM files produces more
  useful results. (Ian Clatworthy)

* The main table of contents now provides links to the new Migration Docs
  and Plugins Guide. (Ian Clatworthy)


bzr 2.0.0rc1
############

:Codename: no worries
:2.0.0rc1: 2009-08-26

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

* The default format for bzr is now ``2a``. This format brings many
  significant performance and size improvements. bzr can pull from
  any existing repository into a ``2a`` one, but can only transfer
  from ``2a`` into ``rich-root`` repositories. The Upgrade guide
  has more information about this change. (Robert Collins)

* On Windows auto-detection of Putty's plink.exe is disabled.
  Default SSH client for Windows is paramiko. User still can force
  usage of plink if explicitly set environment variable BZR_SSH=plink.
  (#414743, Alexander Belchenko)

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

* ``bzr branch --switch`` can now switch the checkout in the current directory
  to the newly created branch. (Lukáš Lalinský)

Bug Fixes
*********

* Further tweaks to handling of ``bzr add`` messages about ignored files.
  (Jason Spashett, #76616)

* Fetches were being requested in 'groupcompress' order, but weren't
  recombining the groups. Thus they would 'fragment' to get the correct
  order, but not 'recombine' to actually benefit from it. Until we get
  recombining to work, switching to 'unordered' fetches avoids the
  fragmentation. (John Arbash Meinel, #402645)

* Fix a pycurl related test failure on karmic by recognizing an error
  raised by newer versions of pycurl.
  (Vincent Ladeuil, #306264)

* Fix a test failure on karmic by making a locale test more robust.
  (Vincent Ladeuil, #413514)

* Fix IndexError printing CannotBindAddress errors.
  (Martin Pool, #286871)

* Fix "Revision ... not present" errors when upgrading stacked branches,
  or when doing fetches from a stacked source to a stacked target.
  (Andrew Bennetts, #399140)

* ``bzr branch`` of 2a repositories over HTTP is much faster.  bzr now
  batches together small fetches from 2a repositories, rather than
  fetching only a few hundred bytes at a time.
  (Andrew Bennetts, #402657)

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

* A better description of the platform is shown in crash tracebacks, ``bzr
  --version`` and ``bzr selftest``.
  (Martin Pool, #409137)

* bzr can now (again) capture crash data through the apport library, 
  so that a single human-readable file can be attached to bug reports.
  This can be disabled by using ``-Dno_apport`` on the command line, or by
  putting ``no_apport`` into the ``debug_flags`` section of
  ``bazaar.conf``.
  (Martin Pool, Robert Collins, #389328)

* ``bzr push`` locally on windows will no longer give a locking error with
  dirstate based formats. (Robert Collins)

* ``bzr shelve`` and ``bzr unshelve`` now work on windows.
  (Robert Collins, #305006)

* Commit of specific files no longer prevents using the iter_changes
  codepath. On 2a repositories, commit of specific files should now be as
  fast, or slightly faster, than a full commit. (Robert Collins)

* The internal core code that handles specific file operations like
  ``bzr st FILENAME`` or ``bzr commit FILENAME`` has been changed to
  include the parent directories if they have altered, and when a
  directory stops being a directory its children are always included. This
  fixes a number of causes for ``InconsistentDelta`` errors, and permits
  faster commit of specific paths. (Robert Collins, #347649)

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

* New developer documentation for content filtering.
  (Martin Pool)

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

* ``bzrlib.shelf_ui`` has had the ``from_args`` convenience methods of its
  classes changed to manage lock lifetime of the trees they open in a way
  consistent with reader-exclusive locks. (Robert Collins, #305006)

Testing
*******


..
   vim: tw=74 ft=rst ff=unix