******************
Variables Glossary
******************

This chapter lists common variables used in the CoreOS build
system and gives an overview of their function and contents.

Variables provided by OpenEmbedded-Core are documented in the
:external:doc:`Yocto Reference Manual <ref-manual/variables>`.


.. glossary::
    :sorted:

    :term:`COREOS_ROOT`

        Specifies the root directory of CoreOS.

        It is an important distinction that :term:`COREOS_ROOT` points to root of
        the Git repository of CoreOS, and not to a layer.

    :term:`COREOS_METADATA_BRANCH`

        The branch currently checked out for the CoreOS project (path
        determined by :term:`COREOS_ROOT`).
    
    :term:`COREOS_METADATA_REVISION`

        The revision currently checked out for the CoreOS project (path
        determined by :term:`COREOS_ROOT`).