Bazaar Release Notes

bzr 0.11

  • Smart server transport test failures on windows fixed. (Lukáš Lalinský).

bzr 0.11rc2


Bug Fixes

  • Test suite hangs on windows fixed. (Andrew Bennets, Alexander Belchenko).
  • Commit performance regression fixed. (Aaron Bentley, Robert Collins, John Arbash Meinel).

bzr 0.11rc1



  • Knit files now wait to create their contents until the first data is added. The old code used to create an empty .knit and a .kndx with just the header. However, this caused a lot of extra round trips over SFTP. This can change the time for bzr push to create a new remote branch from 160s down to 100s. This also affects bzr commit performance when adding new files, bzr commit on a new kernel-like tree drops from 50s down to 40s (John Arbash Meinel, #44692)
  • When an entire subtree has been deleted, commit will now report that just the top of the subtree has been deleted, rather than reporting all the individual items. (Robert Collins)
  • Commit performs one less XML parse. (Robert Collins)
  • bzr checkout now operates on readonly branches as well as readwrite branches. This fixes bug #39542. (Robert Collins)
  • bzr bind no longer synchronises history with the master branch. Binding should be followed by an update or push to synchronise the two branches. This is closely related to the fix for bug #39542. (Robert Collins)
  • bzrlib.lazy_import.lazy_import function to create on-demand objects. This allows all imports to stay at the global scope, but modules will not actually be imported if they are not used. (John Arbash Meinel)
  • Support bzr:// and bzr+ssh:// URLS to work with the new RPC-based transport which will be used with the upcoming high-performance smart server. The new command bzr serve will invoke bzr in server mode, which processes these requests. (Andrew Bennetts, Robert Collins, Martin Pool)
  • New command bzr version-info which can be used to get a summary of the current state of the tree. This is especially useful as part of a build commands. See doc/version_info.txt for more information (John Arbash Meinel)

Bug Fixes

  • 'bzr inventory [FILE...]' allows restricting the file list to a specific set of files. (John Arbash Meinel, #3631)
  • Don’t abort when annotating empty files (John Arbash Meinel, #56814)
  • Add Stanza.to_unicode() which can be passed to another Stanza when nesting stanzas. Also, add read_stanza_unicode to handle when reading a nested Stanza. (John Arbash Meinel)
  • Transform._set_mode() needs to stat the right file. (John Arbash Meinel, #56549)
  • Raise WeaveFormatError rather than StopIteration when trying to read an empty Weave file. (John Arbash Meinel, #46871)
  • Don’t access e.code for generic URLErrors, only HTTPErrors have .code. (Vincent Ladeuil, #59835)
  • Handle boundary=”” lines properly to allow access through a Squid proxy. (John Arbash Meinel, #57723)
  • revert now removes newly-added directories (Aaron Bentley, #54172)
  • bzr upgrade sftp:// shouldn’t fail to upgrade v6 branches if there isn’t a working tree. (David Allouche, #40679)
  • Give nicer error messages when a user supplies an invalid –revision parameter. (John Arbash Meinel, #55420)
  • Handle when LANG is not recognized by python. Emit a warning, but just revert to using ‘ascii’. (John Arbash Meinel, #35392)
  • Don’t use preexec_fn on win32, as it is not supported by subprocess. (John Arbash Meinel)
  • Skip specific tests when the dependencies aren’t met. This includes some tests when python-dev is not available, and some tests that depend on paramiko. (John Arbash Meinel, Mattheiu Moy)
  • Fallback to Paramiko properly, if no ssh executable exists on the system. (Andrew Bennetts, John Arbash Meinel)
  • Branch.bind(other_branch) no longer takes a write lock on the other branch, and will not push or pull between the two branches. API users will need to perform a push or pull or update operation if they require branch synchronisation to take place. (Robert Collins, #43744)
  • When creating a tarball or zipfile export, export unicode names as utf-8 paths. This may not work perfectly on all platforms, but has the best chance of working in the common case. (John Arbash Meinel, #56815)
  • When committing, only files that exist in working tree or basis tree may be specified (Aaron Bentley, #50793)


  • Fixes to run on Python 2.5 (Brian M. Carlson, Martin Pool, Marien Zwart)


  • TestCaseInTempDir now creates a separate directory for HOME, rather than having HOME set to the same location as the working directory. (John Arbash Meinel)
  • run_bzr_subprocess() can take an optional env_changes={} parameter, which will update os.environ inside the spawned child. It also can take a universal_newlines=True, which helps when checking the output of the command. (John Arbash Meinel)
  • Refactor SFTP vendors to allow easier re-use when SSH is used. (Andrew Bennetts)
  • Transport.list_dir() and Transport.iter_files_recursive() should always return urlescaped paths. This is now tested (there were bugs in a few of the transports) (Andrew Bennetts, David Allouche, John Arbash Meinel)
  • New utility function symbol_versioning.deprecation_string. Returns the formatted string for a callable, deprecation format pair. (Robert Collins)
  • New TestCase helper applyDeprecated. This allows you to call a callable which is deprecated without it spewing to the screen, just by supplying the deprecation format string issued for it. (Robert Collins)
  • Transport.append and Transport.put have been deprecated in favor of .append_bytes, .append_file, .put_bytes, and .put_file. This removes the ambiguity in what type of object the functions take. Transport.non_atomic_put_{bytes,file} has also been added. Which works similarly to Transport.append() except for SFTP, it doesn’t have a round trip when opening the file. Also, it provides functionality for creating a parent directory when trying to create a file, rather than raise NoSuchFile and forcing the caller to repeat their request. (John Arbash Meinel)
  • WorkingTree has a new api unversion which allow the unversioning of entries by their file id. (Robert Collins)
  • WorkingTree.pending_merges is deprecated. Please use the get_parent_ids (introduced in 0.10) method instead. (Robert Collins)
  • WorkingTree has a new lock_tree_write method which locks the branch for read rather than write. This is appropriate for actions which only need the branch data for reference rather than mutation. A new decorator needs_tree_write_lock is provided in the workingtree module. Like the needs_read_lock and needs_write_lock decorators this allows static declaration of the locking requirements of a function to ensure that a lock is taken out for casual scripts. (Robert Collins, #54107)
  • All WorkingTree methods which write to the tree, but not to the branch have been converted to use needs_tree_write_lock rather than needs_write_lock. Also converted is the revert, conflicts and tree transform modules. This provides a modest performance improvement on metadir style trees, due to the reduce lock-acquisition, and a more significant performance improvement on lightweight checkouts from remote branches, where trivial operations used to pay a significant penalty. It also provides the basis for allowing readonly checkouts. (Robert Collins)
  • Special case importing the standard library ‘copy’ module. This shaves off 40ms of startup time, while retaining compatibility. See: bzrlib/ for more details. (John Arbash Meinel)
  • WorkingTree has a new parent class MutableTree which represents the specialisations of Tree which are able to be altered. (Robert Collins)
  • New methods mkdir and put_file_bytes_non_atomic on MutableTree that mutate the tree and its contents. (Robert Collins)
  • Transport behaviour at the root of the URL is now defined and tested. (Andrew Bennetts, Robert Collins)


  • New test helper classs MemoryTree. This is typically accessed via self.make_branch_and_memory_tree() in test cases. (Robert Collins)
  • Add start_bzr_subprocess and stop_bzr_subprocess to allow test code to continue running concurrently with a subprocess of bzr. (Andrew Bennetts, Robert Collins)
  • Add a new method Transport.get_smart_client(). This is provided to allow upgrades to a richer interface than the VFS one provided by Transport. (Andrew Bennetts, Martin Pool)

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