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Bazaar 2.0.0 released

Subject: Bazaar 2.0.0 released
From: Martin Pool
Date: Tue, 6 Oct 2009 17:53:24 +1100
Newsgroups: gnu.announce
The Bazaar version control system development team is happy to announce
availability of bzr 2.0.0.  It is now available for download from
<http://bazaar-vcs.org/>, including binary packages for popular platforms.

This release of Bazaar makes the 2a format introduced in bzr 1.16
the default when new branches or repositories are created.  This format
is substantially smaller and faster for most 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 to 2a.

Bazaar 2.0 will be supported with api and format compatible bugfix-only
2.0.x releases for at least the next six months.  In parallel with this we
will make stable monthly beta releases with new features and larger
changes.

Bazaar's key benefits include:

* Flexibility to work either in either a centralized or distributed
  fashion.

* Quick branching and excellent automatic merging of changes, including
  renames of files and directories.

* Portability across all commonly used OS platforms, with integrated
  installers available for Microsoft Windows and Mac OS X.

* Compact storage of history.

* Foreign branch interfaces allowing interoperation with Subversion, git
  and Mercurial.

* A Python extension interface with over 100 plugins available.

* ... and more, see http://bazaar-vcs.org/BzrFeatures

Bazaar is free software (GNU GPL 2+), a part of the GNU project, and
supported by Canonical Ltd.

A list of changes since 1.18.1 is attached, but some highlights are worth
including in the main announcement:

* This release also improves the documentation content and presentation,
  including adding PDF and Windows HtmlHelp versions.

* The keywords plugin can now expand keywords on files changed by the
  commit.

* Clearer message when Bazaar runs out of memory, instead of a MemoryError
  traceback.

* 'bzr branch --switch' can now switch the checkout in the current
  directory to the newly created branch.

* '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.

* 'bzr shelve' and 'bzr unshelve' now work on windows.

-- Martin, for the bzr team


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)

* Fix a segmentation fault when computing the ``merge_sort`` of a graph
  that has a ghost in the mainline ancestry.
  (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. (LukÃÅ LalinskÃ)

Bug Fixes
*********

* 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 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)

Internals
*********

Testing
*******
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