feat: adaptive pipeline

BREAKING CHANGE: change default workflow from Branch pipeline to MR pipeline

templates/gitlab-ci-k8s.yml

@@ -13,14 +13,33 @@
 # program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth 
 # Floor, Boston, MA  02110-1301, USA.
 # =========================================================================================
-# default workflow rules
+# default workflow rules: Merge Request pipelines
 workflow:
   rules:
-    # exclude merge requests
-    - if: $CI_MERGE_REQUEST_ID
+    # prevent branch pipeline when an MR is open (prefer MR pipeline)
+    - if: '$CI_COMMIT_BRANCH && $CI_OPEN_MERGE_REQUESTS'
       when: never
     - when: always
 
+# test job prototype: implement adaptive pipeline rules
+.test-policy:
+  rules:
+    # on tag: auto & failing
+    - if: $CI_COMMIT_TAG
+    # on ADAPTIVE_PIPELINE_DISABLED: auto & failing
+    - if: '$ADAPTIVE_PIPELINE_DISABLED == "true"'
+    # on production or integration branch(es): auto & failing
+    - if: '$CI_COMMIT_REF_NAME =~ $PROD_REF || $CI_COMMIT_REF_NAME =~ $INTEG_REF'
+    # early stage (dev branch, no MR): manual & non-failing
+    - if: '$CI_MERGE_REQUEST_ID == null && $CI_OPEN_MERGE_REQUESTS == null'
+      when: manual
+      allow_failure: true
+    # Draft MR: auto & non-failing
+    - if: '$CI_MERGE_REQUEST_TITLE =~ /^Draft:.*/'
+      allow_failure: true
+    # else (Ready MR): auto & failing
+    - when: on_success
+
 variables:
   # variabilized tracking image
   TBC_TRACKING_IMAGE: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
@@ -559,8 +578,7 @@ k8s-score:
     # exclude when $K8S_SCORE_DISABLED is set
     - if: '$K8S_SCORE_DISABLED == "true"'
       when: never
-    # else: allow failure
-    - allow_failure: true
+    - !reference [.test-policy, rules]
 
 # Deploy job prototype
 # Can be extended to define a concrete environment