[ci] do test selection also for mrs in lecture

.gitlab-ci.yml

@@ -21,6 +21,8 @@ variables:
       when: manual
   variables:
     DUMUX_MR_BRANCH: $DUMUX_MERGE_REQUEST_BRANCH
+    TRIGGER_SOURCE: $CI_PIPELINE_SOURCE
+    MR_TARGET_BRANCH_NAME: $CI_MERGE_REQUEST_TARGET_BRANCH_NAME
 
 full-dune-2.7-gcc:
   extends: .default-trigger

.gitlab-ci/default.yml

@@ -10,6 +10,10 @@ workflow:
   rules:
     - if: $CI_PIPELINE_SOURCE=="parent_pipeline"
 
+variables:
+  TRIGGER_SOURCE: "unknown"
+  MR_TARGET_BRANCH_NAME: "master"
+
 select tests:
   stage: configure
   before_script:
@@ -26,8 +30,13 @@ select tests:
     - |
       dunecontrol --opts=$DUNE_OPTS_FILE --current all
       if [[ -n "${DUMUX_MR_BRANCH}" ]]; then
-          python3 dumux/bin/testing/getchangedfiles.py -o changedfiles.txt -t origin/$DUMUX_MR_BRANCH
-          python3 dumux/bin/testing/findtests.py -o affectedtests.json --file-list changedfiles.txt
+          echo "Detecting test affected by changes in Dumux"
+          python3 dumux/bin/testing/getchangedfiles.py -f dumux -o changedfiles.txt -t origin/$DUMUX_MR_BRANCH
+          python3 dumux/bin/testing/findtests.py -o affectedtests.json --file-list changedfiles.txt --build-dir build-cmake
+      elif [[ "$TRIGGER_SOURCE" == "merge_request_event" ]]; then
+          echo "Detecting test affected by changes in this merge request, using target branch $MR_TARGET_BRANCH_NAME"
+          python3 dumux/bin/testing/getchangedfiles.py -o changedfiles.txt -t origin/$MR_TARGET_BRANCH_NAME
+          python3 dumux/bin/testing/findtests.py -o affectedtests.json --file-list changedfiles.txt --build-dir build-cmake
       else
           echo "Skipping test selection, build/test stages will consider all tests!"
           echo "{}" >> affectedtests.json