gitlab: allow overriding name of the upstream repository

The CI rules have special logic for what happens in upstream. To enable
contributors who modify CI rules to test this logic, however, they need
to be able to override which repo is considered upstream. This
introduces the 'QEMU_CI_UPSTREAM' variable

  git push gitlab <branch> -o ci.variable=QEMU_CI_UPSTREAM=berrange

to make it look as if my namespace is the actual upstream. Namespace in
this context refers to the path fragment in gitlab URLs that is above
the repository. Typically this will be the contributor's gitlab login
name.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230608164018.2520330-3-berrange@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/docs/devel/ci-jobs.rst.inc b/docs/devel/ci-jobs.rst.inc
index f725378..3f6802d 100644
--- a/docs/devel/ci-jobs.rst.inc
+++ b/docs/devel/ci-jobs.rst.inc
@@ -75,6 +75,12 @@ in a handful of namespaces
    'latest', but if running pipelines for different branches
    concurrently, it should be overridden per pipeline.
 
+ * QEMU_CI_UPSTREAM - gitlab namespace that is considered to be
+   the 'upstream'. This defaults to 'qemu-project'. Contributors
+   may choose to override this if they are modifying rules in
+   base.yml and need to validate how they will operate when in
+   an upstream context, as opposed to their fork context.
+
  * nnn - other misc variables not falling into the above
    categories, or using different names for historical reasons
    and not yet converted.