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About
-----
.. image:: https://docs.buildstream.build/_static/release.svg
:target: https://gitlab.com/BuildStream/buildstream/commits/bst-1.2
.. image:: https://docs.buildstream.build/_static/snapshot.svg
:target: https://gitlab.com/BuildStream/buildstream/commits/master
.. image:: https://gitlab.com/BuildStream/buildstream/badges/master/pipeline.svg
:target: https://gitlab.com/BuildStream/buildstream/commits/master
.. image:: https://gitlab.com/BuildStream/buildstream/badges/master/coverage.svg?job=coverage
:target: https://gitlab.com/BuildStream/buildstream/commits/master
.. image:: https://img.shields.io/pypi/v/BuildStream.svg
:target: https://pypi.org/project/BuildStream
.. image:: https://app.fossa.io/api/projects/git%2Bgitlab.com%2FBuildStream%2Fbuildstream.svg?type=shield
:target: https://app.fossa.io/projects/git%2Bgitlab.com%2FBuildStream%2Fbuildstream?ref=badge_shield
What is BuildStream?
====================
`BuildStream <https://buildstream.build>`_ 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.
Why should I use BuildStream?
=============================
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.
How do I use BuildStream?
=========================
Please refer to the `documentation <https://docs.buildstream.build>`_
for information about installing BuildStream, and about the BuildStream YAML format
and plugin options.
How does BuildStream work?
==========================
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.
How can I get started?
======================
To get started, first `install BuildStream by following the installation guide
<https://buildstream.build/install.html>`_
and then follow our tutorial in the
`user guide <https://docs.buildstream.build/main_using.html>`_.
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 <irc://irc.gnome.org/buildstream>`_ channel in `irc.gnome.org <irc://irc.gnome.org>`_
Availability in distros
=======================
* BuildStream:
.. image:: https://repology.org/badge/vertical-allrepos/buildstream.svg
:target: https://repology.org/metapackage/buildstream/versions
* BuildStream external plugins (bst-external)
.. image:: https://repology.org/badge/vertical-allrepos/bst-external.svg
:target: https://repology.org/metapackage/bst-external/versions
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