BuildStream is a Free Software tool for building/integrating software stacks. It takes inspiration, lessons and use-cases from various projects including OBS, Reproducible Builds, Yocto, Baserock, Buildroot, Aboriginal, GNOME Continuous, JHBuild, Flatpak Builder and Android repo.

BuildStream supports multiple build-systems (e.g. autotools, cmake, cpan, distutils, make, meson, qmake), and can create outputs in a range of formats (e.g. debian packages, flatpak runtimes, sysroots, system images) for multiple platforms and chipsets.

BuildStream offers the following advantages:

• Declarative build instructions/definitions

  BuildStream provides a flexible and extensible framework for the modelling of software build pipelines in a declarative YAML format, which allows you to manipulate filesystem data in a controlled, reproducible sandboxed environment.

• Support for developer and integrator workflows

  BuildStream provides traceability and reproducibility for integrators handling stacks of hundreds/thousands of components, as well as workspace features and shortcuts to minimise cycle-time for developers.

• Fast and predictable

  BuildStream can cache previous builds and track changes to source file content and build/config commands. BuildStream only rebuilds the things that have changed.

• Extensible

  You can extend BuildStream to support your favourite build-system.

• Bootstrap toolchains and bootable systems

  BuildStream can create full systems and complete toolchains from scratch, for a range of ISAs including x86_32, x86_64, ARMv7, ARMv8, MIPS.

Please refer to the documentation for information about installing BuildStream, and about the BuildStream YAML format and plugin options.

BuildStream operates on a set of YAML files (.bst files), as follows:

• Loads the YAML files which describe the target(s) and all dependencies.
• Evaluates the version information and build instructions to calculate a build graph for the target(s) and all dependencies and unique cache-keys for each element.
• Retrieves previously built elements (artifacts) from a local/remote cache, or builds the elements in a sandboxed environment using the instructions declared in the .bst files.
• Transforms/configures and/or deploys the resulting target(s) based on the instructions declared in the .bst files.

To get started, first install BuildStream by following the installation guide and then follow our tutorial in the user guide.

We also recommend exploring some existing BuildStream projects:

• https://gitlab.gnome.org/GNOME/gnome-build-meta/
• https://gitlab.com/freedesktop-sdk/freedesktop-sdk
• https://gitlab.com/baserock/definitions

If you have any questions please ask on our #buildstream channel in irc.gnome.org

• BuildStream:

• BuildStream external plugins (bst-external)