CI: Include workflow name instead of hard-coded "nightly" in gitter notifications

Author: cameel

.circleci/config.yml

@@ -48,8 +48,13 @@ commands:
             # but it's broken. CircleCI associates runs on develop/breaking with random old PRs.
             [[ $CIRCLE_BRANCH == develop || $CIRCLE_BRANCH == breaking ]] || { echo "Running on a PR or a feature branch - notification skipped."; exit 0; }
 
-            [[ "<< parameters.event >>" == "failure" ]] && message=" ❌ Nightly job **${CIRCLE_JOB}** failed on **${CIRCLE_BRANCH}**. Please see [build #${CIRCLE_BUILD_NUM}](${CIRCLE_BUILD_URL}) for details."
-            [[ "<< parameters.event >>" == "success" ]] && message=" ✅ Nightly job **${CIRCLE_JOB}** succeeded on **${CIRCLE_BRANCH}**. Please see [build #${CIRCLE_BUILD_NUM}](${CIRCLE_BUILD_URL}) for details."
+            # Workflow name is not exposed as an env variable. Has to be queried from the API.
+            # The name is not critical so if anything fails, use the raw workflow ID as a fallback.
+            workflow_info=$(curl --silent "https://circleci.com/api/v2/workflow/${CIRCLE_WORKFLOW_ID}") || true
+            workflow_name=$(echo "$workflow_info" | jq --raw-output .name || echo "$CIRCLE_WORKFLOW_ID")
+
+            [[ "<< parameters.event >>" == "failure" ]] && message=" ❌ [${workflow_name}] Job **${CIRCLE_JOB}** failed on **${CIRCLE_BRANCH}**. Please see [build #${CIRCLE_BUILD_NUM}](${CIRCLE_BUILD_URL}) for details."
+            [[ "<< parameters.event >>" == "success" ]] && message=" ✅ [${workflow_name}] Job **${CIRCLE_JOB}** succeeded on **${CIRCLE_BRANCH}**. Please see [build #${CIRCLE_BUILD_NUM}](${CIRCLE_BUILD_URL}) for details."
 
             curl "https://api.gitter.im/v1/rooms/${GITTER_NOTIFY_ROOM_ID}/chatMessages" \
               --request POST \