title: BuildProgram
---
module: lektor.build_programs
---
summary: The class for build programs.
---
type: class
---
body:

A build program is responsible for converting a [Source Object
:ref](../../db/obj/) into final build artifacts.  Typically such a build
program implements two methods: [produce_artifacts :ref](produce-artifacts/)
and [build_artifact :ref](build-artifact/).

The former should invoke [declare_artifact :ref](declare-artifact/) for each
artifact that should be created from the source.  The builder will then
invoke [build_artifact :ref](build-artifact/) for each of these declared
artifacts if the builder determiend that the artifact needs to be built.

For an example refer to the [add_build_program
:ref](../../environment/add-build-program/) documentation.