ref-manual: add METADATA_REVISION and METADATA_BRANCH

These are not new variables, but we are using METADATA_REVISION in a new
place and thus need to refer to it.

(From yocto-docs rev: 3b80ece864e8cc06f09d3d4ee645ddeef5d4eaf6)

Signed-off-by: Paul Eggleton <paul.eggleton@microsoft.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 19f5e34c58..f906d4efac 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -4659,6 +4659,14 @@ system and gives an overview of their function and contents.
    :term:`MAINTAINER`
       The email address of the distribution maintainer.
 
+   :term:`METADATA_BRANCH`
+      The branch currently checked out for the OpenEmbedded-Core layer (path
+      determined by :term:`COREBASE`).
+
+   :term:`METADATA_REVISION`
+      The revision currently checked out for the OpenEmbedded-Core layer (path
+      determined by :term:`COREBASE`).
+
    :term:`MIRRORS`
       Specifies additional paths from which the OpenEmbedded build system
       gets source code. When the build system searches for source code, it