/brz/remove-bazaar

====================

Bazaar Release Notes

====================

.. contents::

IN DEVELOPMENT

==============

  IMPROVEMENTS:

   * ``bzr commit`` now doesn't print the revision number twice. (Matt

     Nordhoff, #172612)

  INTERNALS:

    * readv urllib http implementation is now a real iterator above the

      underlying socket and deliver data as soon as it arrives. 'get' still

      wraps its ouput in a StringIO.

      (Vincent Ladeuil)

    * New -Dhttp debug option reports http connections, requests and responses.

      (Vincent Ladeuil)

  BUGFIXES:

   * Catch OSError 17 (file exists) in final phase of tree transform and show

     filename to user.

     (Alexander Belchenko, #111758)

   * Catch ShortReadvErrors while using pycurl. Also make readv more robust by

     allowing multiple GET requests to be issued if too many ranges are

     required.

     (Vincent Ladeuil, #172701)

   * Check for missing basis texts when fetching from packs to packs.

     (John Arbash Meinel, #165290)

   * Give more feedback during long http downloads by making readv deliver data

     as it arrives for urllib, and issue more requests for pycurl.

     (Vincent Ladeuil, #173010)

  API BREAKS:

   * Deprecate not passing a ``location`` argument to commit reporters'

     ``started`` methods. (Matt Nordhoff)

bzr 1.0rc1 2007-11-30

=====================

  NOTES WHEN UPGRADING:

   * The default repository format is now ``pack-0.92``.  This 

     default is used when creating new repositories with ``init`` and 

     ``init-repo``, and when branching over bzr+ssh or bzr+hpss. 

     (See https://bugs.launchpad.net/bugs/164626)

     This format can be read and written by Bazaar 0.92 and later, and 

     data can be transferred to and from older formats.

     To upgrade, please reconcile your repository (``bzr reconcile``), and then

     upgrade (``bzr upgrade``). 

     ``pack-0.92`` offers substantially better scaling and performance than the

     previous knits format. Some operations are slower where the code already

     had bad scaling characteristics under knits, the pack format makes such

     operations more visible as part of being more scalable overall. We will

     correct such operations over the coming releases and encourage the filing

     of bugs on any operation which you observe to be slower in a packs

     repository. One particular case that we do not intend to fix is pulling

     data from a pack repository into a knit repository over a high latency

     link;  downgrading such data requires reinsertion of the file texts, and

     this is a classic space/time tradeoff. The current implementation is

     conservative on memory usage because we need to support converting data

     from any tree without problems.  

     (Robert Collins, Martin Pool, #164476)

  CHANGES:

   * Disable detection of plink.exe as possible ssh vendor. Plink vendor

     still available if user selects it explicitly with BZR_SSH environment

     variable. (Alexander Belchenko, workaround for bug #107593)

   * The pack format is now accessible as "pack-0.92", or "pack-0.92-subtree" 

     to enable the subtree functions (for example, for bzr-svn).  

     See http://doc.bazaar-vcs.org/latest/developer/packrepo.html

     (Martin Pool)

  FEATURES:

   * New ``authentication.conf`` file holding the password or other credentials

     for remote servers. This can be used for ssh, sftp, smtp and other 

     supported transports.

     (Vincent Ladeuil)

   * New rich-root and rich-root-pack formats, recording the same data about

     tree roots that's recorded for all other directories.

     (Aaron Bentley, #164639)

   * ``pack-0.92`` repositories can now be reconciled.

     (Robert Collins, #154173)

   * ``switch`` command added for changing the branch a lightweight checkout

     is associated with and updating the tree to reflect the latest content

     accordingly. This command was previously part of the BzrTools plug-in.

     (Ian Clatworthy, Aaron Bentley, David Allouche)

   * ``reconfigure`` command can now convert branches, trees, or checkouts to

     lightweight checkouts.  (Aaron Bentley)

  PERFORMANCE:

   * Commit updates the state of the working tree via a delta rather than

     supplying entirely new basis trees. For commit of a single specified file

     this reduces the wall clock time for commit by roughly a 30%.

     (Robert Collins, Martin Pool)

   * Commit with many automatically found deleted paths no longer performs

     linear scanning for the children of those paths during inventory

     iteration. This should fix commit performance blowing out when many such

     paths occur during commit. (Robert Collins, #156491)

   * Fetch with pack repositories will no longer read the entire history graph.

     (Robert Collins, #88319)

   * Revert takes out an appropriate lock when reverting to a basis tree, and

     does not read the basis inventory twice. (Robert Collins)

   * Diff does not require an inventory to be generated on dirstate trees.

     (Aaron Bentley, #149254)

  IMPROVEMENTS:

   * ``bzr send`` now doesn't require the target e-mail address to be

     specified on the command line if an interactive e-mail client is used.

     (Lukáš Lalinský)

   * ``bzr tags`` now prints the revision number for each tag, instead of

     the revision id, unless --show-ids is passed. In addition, tags can be

     sorted chronologically instead of lexicographically with --sort=time.

     (Adeodato Simó, #120231)

   * Windows standalone version of bzr is able to load system-wide plugins from

     "plugins" subdirectory in installation directory. In addition standalone

     installer write to the registry (HKLM\SOFTWARE\Bazaar) useful info 

     about paths and bzr version. (Alexander Belchenko, #129298)

  DOCUMENTATION:

  BUG FIXES:

   * A progress bar has been added for knitpack -> knitpack fetching.

     (Robert Collins, #157789, #159147)

   * Branching from a branch via smart server now preserves the repository

     format. (Andrew Bennetts,  #164626)

   * ``commit`` is now able to invoke an external editor in a non-ascii

     directory. (Daniel Watkins, #84043)

   * Catch connection errors for ftp.

     (Vincent Ladeuil, #164567)

   * Catch ShortReadvErrors while using pycurl.

     (Vincent Ladeuil, 172701)

   * ``check`` no longer reports spurious unreferenced text versions.

     (Robert Collins, John A Meinel, #162931, #165071)

   * Conflicts are now resolved recursively by ``revert``.

     (Aaron Bentley, #102739)

   * Detect invalid transport reuse attempts by catching invalid URLs.

     (Vincent Ladeuil, #161819)

   * Do no use timeout in HttpServer anymore.

     (Vincent Ladeuil, #158972).

   * Don't catch the exceptions related to the http pipeline status before

     retrying an http request or some programming errors may be masked.

     (Vincent Ladeuil, #160012)

   * Fix ``bzr rm`` to not delete modified and ignored files.

     (Lukáš Lalinský, #172598)

   * Fix exception when revisionspec contains merge revisons but log

     formatter doesn't support merge revisions. (Kent Gibson, #148908)

   * Fix exception when ScopeReplacer is assigned to before any members have

     been retrieved.  (Aaron Bentley)

   * Fix multiple connections during checkout --lightweight.

     (Vincent Ladeuil, #159150)

   * Fix possible error in insert_data_stream when copying between 

     pack repositories over bzr+ssh or bzr+http.  

     KnitVersionedFile.get_data_stream now makes sure that requested

     compression parents are sent before any delta hunks that depend 

     on them.

     (Martin Pool, #164637)

   * Fix typo in limiting offsets coalescing for http, leading to

     whole files being downloaded instead of parts.

     (Vincent Ladeuil, #165061)

   * FTP server errors don't error in the error handling code.

     (Robert Collins, #161240)

   * Give a clearer message when a pull fails because the source needs

     to be reconciled.

     (Martin Pool, #164443)

   * It is clearer when a plugin cannot be loaded because of its name, and a

     suggestion for an acceptable name is given. (Daniel Watkins, #103023)

   * Leave port as None in transport objects if user doesn't

     specify a port in urls.

     (vincent Ladeuil, #150860)

   * Make sure Repository.fetch(self) is properly a no-op for all

     Repository implementations. (John Arbash Meinel, #158333)

   * Mark .bzr directories as "hidden" on Windows.

     (Alexander Belchenko, #71147)

   * ``merge --uncommitted`` can now operate on a single file.

     (Aaron Bentley, Lukáš Lalinský, #136890)

   * Obsolete packs are now cleaned up by pack and autopack operations.

     (Robert Collins, #153789)

   * Operations pulling data from a smart server where the underlying

     repositories are not both annotated/both unannotated will now work.

     (Robert Collins, #165304).

   * Reconcile now shows progress bars. (Robert Collins, #159351)

   * ``RemoteBranch`` was not initializing ``self._revision_id_to_revno_map``

     properly. (John Arbash Meinel, #162486)

   * Removing an already-removed file reports the file does not exist. (Daniel

     Watkins, #152811)

   * Rename on Windows is able to change filename case.

     (Alexander Belchenko, #77740)

   * Return error instead of a traceback for ``bzr log -r0``.

     (Kent Gibson, #133751)

   * Return error instead of a traceback when bzr is unable to create

     symlink on some platforms (e.g. on Windows).

     (Alexander Belchenko, workaround for #81689)

   * Revert doesn't crash when restoring a single file from a deleted

     directory. (Aaron Bentley)

   * Stderr output via logging mechanism now goes through encoded wrapper

     and no more uses utf-8, but terminal encoding instead. So all unicode

     strings now should be readable in non-utf-8 terminal.

     (Alexander Belchenko, #54173)

   * The error message when ``move --after`` should be used makes how to do so

     clearer. (Daniel Watkins, #85237)

   * Unicode-safe output from ``bzr info``. The output will be encoded

     using the terminal encoding and unrepresentable characters will be

     replaced by '?'. (Lukáš Lalinský, #151844)

   * Working trees are no longer created when pushing into a local no-trees

     repo. (Daniel Watkins, #50582)

   * Upgrade util/configobj to version 4.4.0.

     (Vincent Ladeuil, #151208).

   * Wrap medusa ftp test server as an FTPServer feature.

     (Vincent Ladeuil, #157752)

  API BREAKS:

   * ``osutils.backup_file`` is deprecated. Actually it's not used in bzrlib

     during very long time. (Alexander Belchenko)

   * The return value of

     ``VersionedFile.iter_lines_added_or_present_in_versions`` has been

     changed. Previously it was an iterator of lines, now it is an iterator of

     (line, version_id) tuples. This change has been made to aid reconcile and

     fetch operations. (Robert Collins)

   * ``bzrlib.repository.get_versioned_file_checker`` is now private.

     (Robert Collins)

   * The Repository format registry default has been removed; it was previously

     obsoleted by the bzrdir format default, which implies a default repository

     format.

     (Martin Pool)

  INTERNALS:

   * Added ``ContainerSerialiser`` and ``ContainerPushParser`` to

     ``bzrlib.pack``.  These classes provide more convenient APIs for generating

     and parsing containers from streams rather than from files.  (Andrew

     Bennetts)

   * New module ``lru_cache`` providing a cache for use by tasks that need

     semi-random access to large amounts of data. (John A Meinel)

   * InventoryEntry.diff is now deprecated.  Please use diff.DiffTree instead.

  TESTING:

bzr 0.92 2007-11-05

===================

  CHANGES:

  * New uninstaller on Win32.  (Alexander Belchenko)

bzr 0.92rc1 2007-10-29

======================

  NOTES WHEN UPGRADING:

  CHANGES:

   * ``bzr`` now returns exit code 4 if an internal error occurred, and 

     3 if a normal error occurred.  (Martin Pool)

   * ``pull``, ``merge`` and ``push`` will no longer silently correct some

     repository index errors that occured as a result of the Weave disk format.

     Instead the ``reconcile`` command needs to be run to correct those

     problems if they exist (and it has been able to fix most such problems

     since bzr 0.8). Some new problems have been identified during this release

     and you should run ``bzr check`` once on every repository to see if you

     need to reconcile. If you cannot ``pull`` or ``merge`` from a remote

     repository due to mismatched parent errors - a symptom of index errors -

     you should simply take a full copy of that remote repository to a clean

     directory outside any local repositories, then run reconcile on it, and

     finally pull from it locally. (And naturally email the repositories owner

     to ask them to upgrade and run reconcile).

     (Robert Collins)

  FEATURES:

   * New ``knitpack-experimental`` repository format. This is interoperable with

     the ``dirstate-tags`` format but uses a smarter storage design that greatly

     speeds up many operations, both local and remote. This new format can be

     used as an option to the ``init``, ``init-repository`` and ``upgrade``

     commands. See http://doc.bazaar-vcs.org/0.92/developers/knitpack.html

     for further details. (Robert Collins)

   * For users of bzr-svn (and those testing the prototype subtree support) that

     wish to try packs, a new ``knitpack-subtree-experimental`` format has also

     been added. This is interoperable with the ``dirstate-subtrees`` format.

     (Robert Collins)

   * New ``reconfigure`` command. (Aaron Bentley)

   * New ``revert --forget-merges`` command, which removes the record of a pending 

     merge without affecting the working tree contents.  (Martin Pool)

   * New ``bzr_remote_path`` configuration variable allows finer control of

     remote bzr locations than BZR_REMOTE_PATH environment variable.

     (Aaron Bentley)

   * New ``launchpad-login`` command to tell Bazaar your Launchpad

     user ID.  This can then be used by other functions of the

     Launchpad plugin. (James Henstridge)

  PERFORMANCE:

   * Commit in quiet mode is now slightly faster as the information to

     output is no longer calculated. (Ian Clatworthy)

   * Commit no longer checks for new text keys during insertion when the

     revision id was deterministically unique. (Robert Collins)

   * Committing a change which is not a merge and does not change the number of

     files in the tree is faster by utilising the data about whether files are

     changed to determine if the tree is unchanged rather than recalculating

     it at the end of the commit process. (Robert Collins)

   * Inventory serialisation no longer double-sha's the content.

     (Robert Collins)

   * Knit text reconstruction now avoids making copies of the lines list for

     interim texts when building a single text. The new ``apply_delta`` method

     on ``KnitContent`` aids this by allowing modification of the revision id

     such objects represent. (Robert Collins)

   * Pack indices are now partially parsed for specific key lookup using a

     bisection approach. (Robert Collins)

   * Partial commits are now approximately 40% faster by walking over the

     unselected current tree more efficiently. (Robert Collins)

   * XML inventory serialisation takes 20% less time while being stricter about

     the contents. (Robert Collins)

   * Graph ``heads()`` queries have been fixed to no longer access all history

     unnecessarily. (Robert Collins)

  IMPROVEMENTS:

   * ``bzr+https://`` smart server across https now supported. 

     (John Ferlito, Martin Pool, #128456)

   * Mutt is now a supported mail client; set ``mail_client=mutt`` in your

     bazaar.conf and ``send`` will use mutt. (Keir Mierle)

   * New option ``-c``/``--change`` for ``merge`` command for cherrypicking 

     changes from one revision. (Alexander Belchenko, #141368)

   * Show encodings, locale and list of plugins in the traceback message.

     (Martin Pool, #63894)

   * Experimental directory formats can now be marked with

     ``experimental = True`` during registration. (Ian Clatworthy)

  DOCUMENTATION:

   * New *Bazaar in Five Minutes* guide.  (Matthew Revell)

   * The hooks reference documentation is now converted to html as expected.

     (Ian Clatworthy)

  BUG FIXES:

   * Connection error reporting for the smart server has been fixed to

     display a user friendly message instead of a traceback.

     (Ian Clatworthy, #115601)

   * Make sure to use ``O_BINARY`` when opening files to check their

     sha1sum. (Alexander Belchenko, John Arbash Meinel, #153493)

   * Fix a problem with Win32 handling of the executable bit.

     (John Arbash Meinel, #149113)

   * ``bzr+ssh://`` and ``sftp://`` URLs that do not specify ports explicitly

     no longer assume that means port 22.  This allows people using OpenSSH to

     override the default port in their ``~/.ssh/config`` if they wish.  This

     fixes a bug introduced in bzr 0.91.  (Andrew Bennetts, #146715)

   * Commands reporting exceptions can now be profiled and still have their

     data correctly dumped to a file. For example, a ``bzr commit`` with

     no changes still reports the operation as pointless but doing so no

     longer throws away the profiling data if this command is run with

     ``--lsprof-file callgrind.out.ci`` say. (Ian Clatworthy)

   * Fallback to ftp when paramiko is not installed and sftp can't be used for

     ``tests/commands`` so that the test suite is still usable without

     paramiko.

     (Vincent Ladeuil, #59150)

   * Fix commit ordering in corner case. (Aaron Bentley, #94975)

   * Fix long standing bug in partial commit when there are renames 

     left in tree. (Robert Collins, #140419)

   * Fix selftest semi-random noise during http related tests.

     (Vincent Ladeuil, #140614)

   * Fix typo in ftp.py making the reconnection fail on temporary errors.

     (Vincent Ladeuil, #154259)

   * Fix failing test by comparing real paths to cover the case where the TMPDIR

     contains a symbolic link.

     (Vincent Ladeuil, #141382).

   * Fix log against smart server branches that don't support tags.

     (James Westby, #140615)

   * Fix pycurl http implementation by defining error codes from

     pycurl instead of relying on an old curl definition.

     (Vincent Ladeuil, #147530)

   * Fix 'unprintable error' message when displaying BzrCheckError and 

     some other exceptions on Python 2.5.

     (Martin Pool, #144633)

   * Fix ``Inventory.copy()`` and add test for it. (Jelmer Vernooij)

   * Handles default value for ListOption in cmd_commit.

     (Vincent Ladeuil, #140432)

   * HttpServer and FtpServer need to be closed properly or a listening socket

     will remain opened.

     (Vincent Ladeuil, #140055)

   * Monitor the .bzr directory created in the top level test

     directory to detect leaking tests.

     (Vincent Ladeuil, #147986)

   * The basename, not the full path, is now used when checking whether

     the profiling dump file begins with ``callgrind.out`` or not. This

     fixes a bug reported by Aaron Bentley on IRC. (Ian Clatworthy)

   * Trivial fix for invoking command ``reconfigure`` without arguments.

     (Rob Weir, #141629)

   * ``WorkingTree.rename_one`` will now raise an error if normalisation of the

     new path causes bzr to be unable to access the file. (Robert Collins)

   * Correctly detect a NoSuchFile when using a filezilla server. (Gary van der

     Merwe)

  API BREAKS:

   * ``bzrlib.index.GraphIndex`` now requires a size parameter to the

     constructor, for enabling bisection searches. (Robert Collins)

   * ``CommitBuilder.record_entry_contents`` now requires the root entry of a

     tree be supplied to it, previously failing to do so would trigger a

     deprecation warning. (Robert Collins)

   * ``KnitVersionedFile.add*`` will no longer cache added records even when

     enable_cache() has been called - the caching feature is now exclusively for

     reading existing data. (Robert Collins)

   * ``ReadOnlyLockError`` is deprecated; ``LockFailed`` is usually more 

     appropriate.  (Martin Pool)

   * Removed ``bzrlib.transport.TransportLogger`` - please see the new

     ``trace+`` transport instead. (Robert Collins)

   * Removed previously deprecated varargs interface to ``TestCase.run_bzr`` and

     deprecated methods ``TestCase.capture`` and ``TestCase.run_bzr_captured``.

     (Martin Pool)

   * Removed previous deprecated ``basis_knit`` parameter to the

     ``KnitVersionedFile`` constructor. (Robert Collins)

   * Special purpose method ``TestCase.run_bzr_decode`` is moved to the test_non_ascii 

     class that needs it.

     (Martin Pool)

   * The class ``bzrlib.repofmt.knitrepo.KnitRepository3`` has been folded into

     ``KnitRepository`` by parameters to the constructor. (Robert Collins)

   * The ``VersionedFile`` interface now allows content checks to be bypassed

     by supplying check_content=False.  This saves nearly 30% of the minimum

     cost to store a version of a file. (Robert Collins)

   * Tree's with bad state such as files with no length or sha will no longer

     be silently accepted by the repository XML serialiser. To serialise

     inventories without such data, pass working=True to write_inventory.

     (Robert Collins)

   * ``VersionedFile.fix_parents`` has been removed as a harmful API.

     ``VersionedFile.join`` will no longer accept different parents on either

     side of a join - it will either ignore them, or error, depending on the

     implementation. See notes when upgrading for more information.

     (Robert Collins)

  INTERNALS:

   * ``bzrlib.transport.Transport.put_file`` now returns the number of bytes

     put by the method call, to allow avoiding stat-after-write or

     housekeeping in callers. (Robert Collins)

   * ``bzrlib.xml_serializer.Serializer`` is now responsible for checking that

     mandatory attributes are present on serialisation and deserialisation.

     This fixes some holes in API usage and allows better separation between

     physical storage and object serialisation. (Robert Collins)

   * New class ``bzrlib.errors.InternalBzrError`` which is just a convenient

     shorthand for deriving from BzrError and setting internal_error = True.

     (Robert Collins)

   * New method ``bzrlib.mutabletree.update_to_one_parent_via_delta`` for

     moving the state of a parent tree to a new version via a delta rather than

     a complete replacement tree. (Robert Collins)

   * New method ``bzrlib.osutils.minimum_path_selection`` useful for removing

     duplication from user input, when a user mentions both a path and an item

     contained within that path. (Robert Collins)

   * New method ``bzrlib.repository.Repository.is_write_locked`` useful for

     determining if a repository is write locked. (Robert Collins)

   * New method on ``bzrlib.tree.Tree`` ``path_content_summary`` provides a

     tuple containing the key information about a path for commit processing

     to complete. (Robert Collins)

   * New method on xml serialisers, write_inventory_to_lines, which matches the

     API used by knits for adding content. (Robert Collins)

   * New module ``bzrlib.bisect_multi`` with generic multiple-bisection-at-once

     logic, currently only available for byte-based lookup

     (``bisect_multi_bytes``). (Robert Collins)

   * New helper ``bzrlib.tuned_gzip.bytes_to_gzip`` which takes a byte string

     and returns a gzipped version of the same. This is used to avoid a bunch

     of api friction during adding of knit hunks. (Robert Collins)

   * New parameter on ``bzrlib.transport.Transport.readv``

     ``adjust_for_latency`` which changes readv from returning strictly the

     requested data to inserted return larger ranges and in forward read order

     to reduce the effect of network latency. (Robert Collins)

   * New parameter yield_parents on ``Inventory.iter_entries_by_dir`` which

     causes the parents of a selected id to be returned recursively, so all the

     paths from the root down to each element of selected_file_ids are

     returned. (Robert Collins)

   * Knit joining has been enhanced to support plain to annotated conversion

     and annotated to plain conversion. (Ian Clatworthy)

   * The CommitBuilder method ``record_entry_contents`` now returns summary

     information about the effect of the commit on the repository. This tuple

     contains an inventory delta item if the entry changed from the basis, and a

     boolean indicating whether a new file graph node was recorded.

     (Robert Collins)

   * The python path used in the Makefile can now be overridden.

     (Andrew Bennetts, Ian Clatworthy)

  TESTING:

   * New transport implementation ``trace+`` which is useful for testing,

     logging activity taken to its _activity attribute. (Robert Collins)

   * When running bzr commands within the test suite, internal exceptions are

     not caught and reported in the usual way, but rather allowed to propagate

     up and be visible to the test suite.  A new API ``run_bzr_catch_user_errors``

     makes this behavior available to other users.

     (Martin Pool)

   * New method ``TestCase.call_catch_warnings`` for testing methods that 

     raises a Python warning.  (Martin Pool)

bzr 0.91 2007-09-26

===================

  BUG FIXES:

   * Print a warning instead of aborting the ``python setup.py install``

     process if building of a C extension is not possible.

     (Lukáš Lalinský, Alexander Belchenko)

   * Fix commit ordering in corner case (Aaron Bentley, #94975)

   * Fix ''bzr info bzr://host/'' and other operations on ''bzr://' URLs with

     an implicit port.  We were incorrectly raising PathNotChild due to

     inconsistent treatment of the ''_port'' attribute on the Transport object.

     (Andrew Bennetts, #133965)

   * Make RemoteRepository.sprout cope gracefully with servers that don't

     support the ``Repository.tarball`` request.

     (Andrew Bennetts)

bzr 0.91rc2 2007-09-11

======================

   * Replaced incorrect tarball for previous release; a debug statement was left 

     in bzrlib/remote.py.

bzr 0.91rc1 2007-09-11

======================

  CHANGES:

   * The default branch and repository format has changed to 

     ``dirstate-tags``, so tag commands are active by default.

     This format is compatible with Bazaar 0.15 and later.

     This incidentally fixes bug #126141.

     (Martin Pool)

   * ``--quiet`` or ``-q`` is no longer a global option. If present, it

     must now appear after the command name. Scripts doing things like

     ``bzr -q missing`` need to be rewritten as ``bzr missing -q``.

     (Ian Clatworthy)

  FEATURES:

   * New option ``--author`` in ``bzr commit`` to specify the author of the

     change, if it's different from the committer. ``bzr log`` and

     ``bzr annotate`` display the author instead of the committer.

     (Lukáš Lalinský)

   * In addition to global options and command specific options, a set of

     standard options are now supported. Standard options are legal for

     all commands. The initial set of standard options are:

     * ``--help`` or ``-h`` - display help message

     * ``--verbose`` or ``-v`` - display additional information

     * ``--quiet``  or ``-q`` - only output warnings and errors.

     Unlike global options, standard options can be used in aliases and

     may have command-specific help. (Ian Clatworthy)

   * Verbosity level processing has now been unified. If ``--verbose``

     or ``-v`` is specified on the command line multiple times, the

     verbosity level is made positive the first time then increased.

     If ``--quiet`` or ``-q`` is specified on the command line

     multiple times, the verbosity level is made negative the first

     time then decreased. To get the default verbosity level of zero,

     either specify none of the above , ``--no-verbose`` or ``--no-quiet``.

     Note that most commands currently ignore the magnitude of the

     verbosity level but do respect *quiet vs normal vs verbose* when

     generating output. (Ian Clatworthy)

   * ``Branch.hooks`` now supports ``pre_commit`` hook. The hook's signature

     is documented in BranchHooks constructor. (Nam T. Nguyen, #102747)

   * New ``Repository.stream_knit_data_for_revisions`` request added to the

     network protocol for greatly reduced roundtrips when retrieving a set of

     revisions. (Andrew Bennetts)

  BUG FIXES:

   * ``bzr plugins`` now lists the version number for each plugin in square

     brackets after the path. (Robert Collins, #125421)

   * Pushing, pulling and branching branches with subtree references was not

     copying the subtree weave, preventing the file graph from being accessed

     and causing errors in commits in clones. (Robert Collins)

   * Suppress warning "integer argument expected, got float" from Paramiko,

     which sometimes caused false test failures.  (Martin Pool)

   * Fix bug in bundle 4 that could cause attempts to write data to wrong

     versionedfile.  (Aaron Bentley)

   * Diffs generated using "diff -p" no longer break the patch parser.

     (Aaron Bentley)

   * get_transport treats an empty possible_transports list the same as a non-

     empty one.  (Aaron Bentley)

   * patch verification for merge directives is reactivated, and works with

     CRLF and CR files.  (Aaron Bentley)

   * Accept ..\ as a path in revision specifiers. This fixes for example

     "-r branch:..\other-branch" on Windows.  (Lukáš Lalinský) 

   * ``BZR_PLUGIN_PATH`` may now contain trailing slashes.

     (Blake Winton, #129299)

   * man page no longer lists hidden options (#131667, Aaron Bentley)

   * ``uncommit --help`` now explains the -r option adequately.  (Daniel

     Watkins, #106726)

   * Error messages are now better formatted with parameters (such as

     filenames) quoted when necessary. This avoids confusion when directory

     names ending in a '.' at the end of messages were confused with a

     full stop that may or not have been there. (Daniel Watkins, #129791)

   * Fix ``status FILE -r X..Y``. (Lukáš Lalinský)

   * If a particular command is an alias, ``help`` will show the alias

     instead of claiming there is no help for said alias. (Daniel Watkins,

     #133548)

   * TreeTransform-based operations, like pull, merge, revert, and branch,

     now roll back if they encounter an error.  (Aaron Bentley, #67699)

   * ``bzr commit`` now exits cleanly if a character unsupported by the

     current encoding is used in the commit message.  (Daniel Watkins,

     #116143)

   * bzr send uses default values for ranges when only half of an elipsis

     is specified ("-r..5" or "-r5..").  (#61685, Aaron Bentley)

   * Avoid trouble when Windows ssh calls itself 'plink' but no plink

     binary is present.  (Martin Albisetti, #107155)

   * ``bzr remove`` should remove clean subtrees.  Now it will remove (without