.gitlab-ci.yml: use upstream container for dco-check

Signed-off-by: Zygmunt Krynicki <zygmunt.krynicki@huawei.com>

.gitlab-ci.yml

@@ -9,13 +9,28 @@ stages:
   - integration
 
 include:
-  - project: distro/oniro
-    file:
-     - .oniro-ci/dco.yaml
   - template: 'Workflows/MergeRequest-Pipelines.gitlab-ci.yml'
 
 dco:
-  extends: .dco
+  interruptible: true
+  stage: compliance
+  image: christophebedard/dco-check:latest
+  rules:
+    - if: $CI_MERGE_REQUEST_ID
+    - if: $CI_EXTERNAL_PULL_REQUEST_IID
+    - if: $CI_COMMIT_BRANCH == '$CI_DEFAULT_BRANCH'
+  script:
+    # Work around a bug in dco-check affecting pipelines for merge requests.
+    # https://github.com/christophebedard/dco-check/issues/104
+    - |
+        if [ "${CI_MERGE_REQUEST_EVENT_TYPE:-}" = detached ]; then
+            git fetch -a  # so that we can resolve branch names below
+            export CI_COMMIT_BRANCH="$CI_COMMIT_REF_NAME";
+            export CI_COMMIT_BEFORE_SHA="$CI_MERGE_REQUEST_DIFF_BASE_SHA";
+            export CI_MERGE_REQUEST_SOURCE_BRANCH_SHA="$(git rev-parse "origin/$CI_MERGE_REQUEST_SOURCE_BRANCH_NAME")";
+            export CI_MERGE_REQUEST_TARGET_BRANCH_SHA="$(git rev-parse "origin/$CI_MERGE_REQUEST_TARGET_BRANCH_NAME")";
+        fi
+    - dco-check --default-branch-from-remote --verbose
 
 reuse:
   interruptible: true