Breezy 3.1alpha1

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Jelmer Vernooij
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Release notes 

Python 2 EOL'ed

The 3.1 series will be the last Breezy release series that supports Python 2.7.
Release series 3.2 and later will only support Python 3.5 and later.

New command names

``brz init-repo`` has been renamed to ``brz init-shared-repo``
to emphasize that it creates
shared repositories rather than just any kind of repository.

``brz sprout`` is now an alias for ``brz branch``.

New Commands

A new ``brz land`` command can merge merge proposals
on Launchpad, GitHub or GitLab instances.

The ``brz patch`` command (previously bundled in bzrtools) can apply
patches to a tree.

The ``brz clone`` command can clone an entire local or remote control
directory, rather than just a single branch (as the ``brz branch`` command does).

Better detection of other version control systems

Breezy can now detect local Subversion, Fossil and Mercurial
repositories and notify the user about conversion

It will also detect and inform about remote Mercurial, Fossil, CVS-Pserver and
Subversion repositories.

Nested Tree Support

This release improves support for by-reference nested trees in Breezy, both
in the Bazaar and Git formats.

Note that nested tree support is not complete yet, and commands for creating
nested trees are still hidden.

Improved Git support

This release contains a large number of fixes for the Git support
in Breezy, both for crash fixes and performance.

There is also improved support for honoring more of the
standard Git configuration variables in e.g. ~/.gitconfig.

Repositories with Git submodules can now be imported into
Bazaar branches.


View the full changelog

External Compatibility Breaks

.. These may require users to change the way they use Breezy.

* The ``brz init-repo`` command has been renamed to
  ``brz init-shared-repo`` to emphasize that it creates
  shared repositories rather than just any kind of repository.
  (Jelmer Vernooij)

New Features

.. New commands, options, etc that users may wish to try out.

* A new ``brz land`` command can merge merge proposals on Launchpad,
  GitHub and GitLab sites. (Jelmer Vernooij, #1816213)

* The 'patch' command is now bundled with brz.
  Imported from bzrtools by Aaron Bentley. (Jelmer Vernooij)

* The 'quilt' plugin, extracted from brz-debian, is now
  bundled. (Jelmer Vernooij)

* A new ``calculate_revnos`` configuration option (defaults to enabled)
  can be used to disable revno display for branch formats that
  do not natively store revnos. This speeds up ``brz log`` on
  the Samba git branch by 33%.
  (Jelmer Vernooij)

* Directly read mtab rather than using psutil when trying to figure out
  filesystem types. This removes a dependency that not all users may
  have installed and speeds up import time since psutil brings in
  various other modules. (Jelmer Vernooij)

* ``brz diff`` now has a --color argument that can write
  color diff output. This is based on the cdiff code in
  bzrtools by Aaron Bentley.
  (Jelmer Vernooij, #376594)

* Information about tree references can now be updated on remote
  branches. (Jelmer Vernooij)

* Warn the user when they attempt to use Breezy in a Subversion
  working copy. (Jelmer Vernooij)

* Add a basic Mercurial plugin that mentions that .hg repositories
  are unsupported when the user attempts to access one.
  (Jelmer Vernooij)

* The ``2a`` format now officially supports storing tree references.
  It always partially supported storing tree reference data,
  and would happily pull in tree reference data from other repository
  formats. (Jelmer Vernooij)

* A new ``fossil`` plugin has been added that warns users when they
  attempt to access Fossil repositories.
  (Jelmer Vernooij, #1848821)

* When pushing to Git repositories, symrefs are now followed.
  (Jelmer Vernooij, #1800393)

* New ``brz clone`` command, which clones everything under
  a control directory. I.e. all colocated branches, like
  ``git clone``. (Jelmer Vernooij, #831939)

* ``brz sprout`` is now an alias for ``brz branch``.
  (Jelmer Vernooij)

* ``brz branch`` now accepts a ``-b`` flag with the
  name of the colocated branch to sprout.
  (Jelmer Vernooij, #1869977)

* Add a ``breezy.__main__`` module so that
  ``python3 -m breezy`` works. (Jelmer Vernooij)


.. Improvements to existing commands, especially improved performance
   or memory usage, or better results.

* A new ``--commit-message`` option has been added to
  ``brz propose``, for hosting sites that support it.
  (Jelmer Vernooij)

* Automatically upgrade to branch format 8 when setting branch references.
  (Jelmer Vernooij)

* The ``ssh`` configuration variable can be used to set the default
  SSH implementation. (Jelmer Vernooij, #650757)

* ``locks.steal_dead`` is now enabled by default.
  (Jelmer Vernooij, #220464)

* The substitution variables for the ``change_editor`` configuration
  option are now "{old_path}" and "{new_path}" rather than "@old_path" and
  "@new_path". The former is more consistent with the way substitutions
  work in other configuration options. The old syntax is still supported.
  (Jelmer Vernooij, #708718)

* The ``brz inventory`` command now accepts a ``--include-root``
  argument to show the tree root. (Jelmer Vernooij)

* Fix support for reading Git repositories over HTTP without
  a smart server. (Jelmer Vernooij)

* CVS pserver URLs now indicate that the pserver protocol is not
  supported. (Jelmer Vernooij)

* Git repositories with submodules can now be imported into 2a
  branches; submodules are converted to nested trees.
  (Jelmer Vernooij, #402814)

* Python 3 is now used by default to run scripts, etc. from the makefile.
  (Jelmer Vernooij)

* ``.git/config`` is now consulted to determine the users' identity
  for commits, and the gpg_signing_key. (Jelmer Vernooij)

* Ignore special files (fifos, block/character devices, sockets)
  when finding changes in Git working trees. (Jelmer Vernooij, #1857244)

Bug Fixes

.. Fixes for situations where brz would previously crash or give incorrect
   or undesirable results.

* Print a sensible error message when conversion for an option fails
  (i.e. when a non-int is specified as the value for an integer
  parameter) (#237844, Jelmer Vernooij)

* Don't include timestamps in filenames when reporting on binary
  files in diff. (Jelmer Vernooij, #71307)

* Ignore UnknownFormatErrors when scanning for control directories.
  (Jelmer Vernooij, #468332)

* Fix fetching from remote git repositories in ``brz git-import``.
  (Jelmer Vernooij, #1836238)

* A new ``TreeEntry.is_unmodified`` method has added, which allows
  merge to check for unmodified files without relying
  on the .revision attribute that is not available for Git trees.
  This fixes LCA merges for Git repositories.
  (Jelmer Vernooij, #1826663)

* Fix passing of directories in specific_files to
  GitWorkingTree.iter_entries_by_dir(). (Jelmer Vernooij, #1844054)

* Fix ``brz diff --using`` when {old_path} and {new_path} are not
  specified in the template. (#1847915, Jelmer Vernooij)

* Ignore ghost tags when interacting with remote Git repositories.
  (Jelmer Vernooij)

* Fix ``setup_ui=False`` when initializing Breezy.
  (Jelmer Vernooij, #1852647)

* Fix backwards compatibility with Bazaar by supporting the
  $BZR_EMAIL variable. (Jelmer Vernooij, #1869178)

* Cope with non-ascii characters in Git signatures.
  (Jelmer Vernooij, #1869533)


.. Improved or updated documentation.

API Changes

.. Changes that may require updates in plugins or other code that uses

* New ``Tree.get_transform`` method for getting a ``TreeTransform``
  object. (Jelmer Vernooij)

* The ``Tree.get_root_id`` method has been removed. Use
  ``Tree.path2id('')`` instead. (Jelmer Vernooij)

* ``Repository.find_branches`` now returns an iterator rather than a
  list. (Jelmer Vernooij, #413970)

* New ``Tree.get_nested_tree`` method for retrieving a nested tree.
  (Jelmer Vernooij)

* The ``ControlDirFormat.register_server_prober`` method has been removed.
  Instead, probers can now have a ``priority`` method to influence
  when they are run. (Jelmer Vernooij)

* New ``urlutils.strip_segment_parameters`` function for
  stripping segment parameters from a URL.
  (Jelmer Vernooij)

* ``Tree.id2path`` has a new optional argument ``recurse``,
  that determines whether it scans through nested trees.
  (Jelmer Vernooij)

* ``VersionedFiles.add_content`` can now be used to add
  content from ``ContentFactory`` objects.
  (Jelmer Vernooij)


.. Major internal changes, unlikely to be visible to users or plugin
   developers, but interesting for brz developers.


.. Fixes and changes that are only relevant to brz's test framework and
   suite. This can include new facilities for writing tests, fixes to
   spurious test failures and changes to the way things should be tested.

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