Core Bazaar format implementations and utilities, extracted from the Breezy version control system.

bzrformats provides the internal format implementations that power Bazaar-compatible version control. It includes serialization, compression, indexing, and data structure modules for reading and writing Bazaar repositories, working trees, and branches.

• Versioned file storage — knit, weave, and groupcompress formats
• Directory state tracking — efficient metadata caching for working trees
• Serialization — XML-based inventory and revision serialization (formats 5–8), plus CHK-based serialization
• Indexing — graph index and B+Tree index for pack-based repositories
• Compression — groupcompress for efficient delta storage of related files
• Pack repositories — container format for bundling versioned data
• Rust accelerators — performance-critical code implemented in Rust with Python bindings via PyO3
• Cython extensions — optional compiled extensions for hot paths

pip install bzrformats

Building from source requires:

• Python >= 3.10, < 3.15
• A Rust toolchain (for the compiled extensions)
• Cython >= 0.29

This package is primarily intended for use by version control systems and tools that need to work with Bazaar format data. The modules provide building blocks for implementing Bazaar-compatible storage formats.

from bzrformats import knit, groupcompress, index

GNU General Public License v2 or later (GPLv2+). See COPYING.txt.

These modules were originally part of the Breezy project (breezy.bzr) and have been extracted into a standalone package.