Skip tests based on git changes on GitLab

Author: smola

.gitlab-ci.yml

@@ -223,7 +223,11 @@ build_tests:
         MAVEN_OPTS: "-Xms64M -Xmx512M -Dorg.slf4j.simpleLogger.defaultLogLevel=debug" # FIXME: Build :smokeTest build fails unless mvn debug logging is on
 
   script:
-    - ./gradlew clean $GRADLE_TARGET -PskipTests $GRADLE_ARGS
+    - |
+      if [[ ! $CI_COMMIT_BRANCH =~ ^(master|release/.*)$ ]]; then
+        export GRADLE_PARAMS="$GRADLE_PARAMS -PgitBaseRef=origin/$CI_DEFAULT_BRANCH"
+      fi
+    - ./gradlew clean $GRADLE_TARGET $GRADLE_PARAMS -PskipTests $GRADLE_ARGS
 
 populate_dep_cache:
   extends: build_tests
@@ -327,7 +331,11 @@ test_published_artifacts:
   variables:
     CACHE_TYPE: lib
   script:
-    - ./gradlew $GRADLE_TARGET -PskipTests -PrunBuildSrcTests -PskipSpotless -PtaskPartitionCount=$NORMALIZED_NODE_TOTAL -PtaskPartition=$NORMALIZED_NODE_INDEX $GRADLE_ARGS
+    - |
+      if [[ ! $CI_COMMIT_BRANCH =~ ^(master|release/.*)$ ]]; then
+        export GRADLE_PARAMS="$GRADLE_PARAMS -PgitBaseRef=origin/$CI_DEFAULT_BRANCH"
+      fi
+    - ./gradlew $GRADLE_TARGET $GRADLE_PARAMS -PskipTests -PrunBuildSrcTests -PskipSpotless -PtaskPartitionCount=$NORMALIZED_NODE_TOTAL -PtaskPartition=$NORMALIZED_NODE_INDEX $GRADLE_ARGS
   after_script:
     - *cgroup_info
     - source .gitlab/gitlab-utils.sh
@@ -460,6 +468,10 @@ muzzle-dep-report:
     - if: $CI_COMMIT_BRANCH == "master"
       when: on_success
   script:
+    - |
+      if [[ ! $CI_COMMIT_BRANCH =~ ^(master|release/.*)$ ]]; then
+        export GRADLE_PARAMS="$GRADLE_PARAMS -PgitBaseRef=origin/$CI_DEFAULT_BRANCH"
+      fi
     - >
       if [ "$PROFILE_TESTS" == "true" ] && [ "$testJvm" != "ibm8" ] && [ "$testJvm" != "oracle8" ];
       then