[all PATCH] gitlab: add CI job for validating DCO signoff

[Daniel P. Berrangé]

This job uses the shared "check-dco" image to validate that all
commits on a developer's branch have a suitable Signed-off-by
statement present.

Signed-off-by: Daniel P. Berrangé <berrange at redhat.com>
---

This patch was against the Perl repo, but if this is approved then
I'll also apply it to *all* the other repos which currently lack a
DCO check, without reposting further patches for each repo.

For libvirt.git I'll send a patch to update its existing DCO job.

 .gitlab-ci.yml | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100644 .gitlab-ci.yml

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000..56e0e02
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,16 @@
+
+stages:
+  - prebuild
+
+# Check that all commits are signed-off for the DCO. Skip
+# on master branch and -maint branches, since we only need
+# to test developer's personal branches.
+check-dco:
+  stage: prebuild
+  image: registry.gitlab.com/libvirt/libvirt-ci/check-dco:master
+  script:
+    - /check-dco
+  only:
+    - branches
+  except:
+    - master
-- 
2.25.2