try to output CDASH url

.ci/config.ctest

@@ -66,6 +66,8 @@ IF(NOT IGNORE_BUILD_FAILURES)
     MESSAGE("")
     MESSAGE("  ${Yellow}Test results submitted to${ColorReset}")
     MESSAGE("  ${BoldYellow}${SHORTURL}${ColorReset}")
+    # Github workflow output
+    MESSAGE("::set-output name=CDASH_URL::${SHORTURL}$")
     MESSAGE("")
     MESSAGE( FATAL_ERROR "  ${Red}Build failed. Not running tests.${ColorReset}" )
     MESSAGE("")

.github/workflows/run-tests.yml

@@ -108,9 +108,13 @@ jobs:
           docker commit qgis_container qgis_image
 
       - name: run unit tests
+        id: unit-tests
         run: |
           docker-compose -f .docker/docker-compose-testing.yml run qgis-deps /root/QGIS/.docker/docker-qgis-test.sh
 
+      - name: CDASH url
+        run: echo "${{ steps.unit-tests.outputs.CDASH_URL }}"
+
       - name: QGIS runners
         run: |
           docker run -d --name qgis-testing-environment \