bzr 2.0.0rc2 released

[Martin Pool]

The Bazaar development team is happy to announce availability of the
second release candidate for bzr 2.0.0.  We expect to release 2.0.0 within
a week, with no code changes from this rc, and we would very much
appreciate testing and bug reports on this release.

The focus of this release is our new repository format, 2a, which becomes
the default in the 2.0.0 release.  This release fixes some important bugs
in the first release candidate so we recommend people using 2.0rc1
upgrade.  This release is now also suitable for use by users of earlier
bzr releases.

Starting from 2.0.0 we will maintain a stable series of 2.0.x releases,
with no api or format changes, only bug fixes.  

Source and binaries for this release are now available from
<https://launchpad.net/bzr/2.0/2.0.0rc2>, and the changes since 2.0.0rc1
are summarized below.

-- Martin, for the bzr team


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)
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