docs/ci: Add docs for EXTRA_LOCAL_PACKAGES

Add a section about reusing the CI scripts for other projects.

Signed-off-by: Helen Koike <helen.koike@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23894>

diff --git a/docs/ci/index.rst b/docs/ci/index.rst
index d49a619..03acd69 100644 (file)
--- a/docs/ci/index.rst
+++ b/docs/ci/index.rst
@@ -304,3 +304,15 @@ instructions on how to uprev Linux Kernel in the GitLab CI ecosystem.
   :maxdepth: 1
 
   kernel
+
+
+Reusing CI scripts for other projects
+--------------------------------------
+
+The CI scripts in ``.gitlab-ci/`` can be reused for other projects, to
+facilitate reuse of the infrastructure, our scripts can be used as tools
+to create containers and run tests on the available farms.
+
+.. envvar:: EXTRA_LOCAL_PACKAGES
+
+   Define extra Debian packages to be installed in the container.
\ No newline at end of file