post comment with CDASH url when tests are failing

.ci/config.ctest

@@ -67,7 +67,7 @@ IF(NOT IGNORE_BUILD_FAILURES)
     MESSAGE("  ${Yellow}Test results submitted to${ColorReset}")
     MESSAGE("  ${BoldYellow}${SHORTURL}${ColorReset}")
     # Github workflow output
-    MESSAGE("::set-output name=CDASH_URL::${SHORTURL}$")
+    MESSAGE("::set-output name=CDASH_URL::${SHORTURL}")
     MESSAGE("")
     MESSAGE( FATAL_ERROR "  ${Red}Build failed. Not running tests.${ColorReset}" )
     MESSAGE("")
@@ -80,7 +80,7 @@ IF(NOT ${NUMWARN} EQUAL 0 OR NOT ${TESTRES} EQUAL 0)
   MESSAGE("  ${Yellow}Test results submitted to${ColorReset}")
   MESSAGE("  ${BoldYellow}${SHORTURL}${ColorReset}" )
   # Github workflow output
-  MESSAGE("::set-output name=CDASH_URL::${SHORTURL}$")
+  MESSAGE("::set-output name=CDASH_URL::${SHORTURL}")
   MESSAGE("")
   SET(LEVEL "")
   IF(NOT ${TESTRES} EQUAL 0)

.github/workflows/run-tests.yml

@@ -160,6 +160,15 @@ jobs:
     name: Publish link to CDASH
     needs: build
     runs-on: ubuntu-latest
-    if: failure()
+    if: failure() and github.event_name == 'pull_request'
     steps:
       - run: echo "${{ needs.build.outputs.cdash_url }}"
+
+      - name: Create comment
+        uses: peter-evans/create-or-update-comment@v1
+        with:
+          token: ${{ steps.token.outputs.token }}
+          issue-number: ${{ github.event.pull_request.number }}
+          body: |
+            Some tests are failing.
+            Tests results: ${{ needs.build.outputs.cdash_url }}