Bazaar 1.6beta3

bzr 1.6beta2 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)