ci: send slack message when ci fails on main

Author: arad-starkware

.github/workflows/notify-slack.yaml

@@ -0,0 +1,51 @@
+name: Notify Slack on Failure
+
+on:
+  workflow_call:
+    inputs:
+      context_title:
+        required: true
+        type: string
+        description: The context title (e.g., "PR #123: Title" or "main branch")
+      failed_job_name:
+        required: true
+        type: string
+        description: The name of the failed job
+    secrets:
+      SLACK_WEBHOOK_URL:
+        required: true
+
+jobs:
+  notify-slack:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Send Slack Notification
+        uses: slackapi/[email protected]
+        with:
+          webhook: ${{ secrets.SLACK_WEBHOOK_URL }}
+          webhook-type: incoming-webhook
+
+          payload: |
+            text: "@channel CI failed on ${{ inputs.context_title }}"
+            blocks:
+              - type: "section"
+                text:
+                  type: "mrkdwn"
+                  text: "<!channel> :rotating_light: *CI FAILED on ${{ inputs.context_title }}*"
+
+              - type: "section"
+                fields:
+                  - type: "mrkdwn"
+                    text: "*Workflow:*\n`${{ github.workflow }}`"
+                  - type: "mrkdwn"
+                    text: "*Failed Job:*\n`${{ inputs.failed_job_name }}`"
+                  - type: "mrkdwn"
+                    text: "*Commit:*\n`${{ github.sha }}`"
+                  - type: "mrkdwn"
+                    text: "*Author:*\n`${{ github.actor }}`"
+
+              - type: "section"
+                text:
+                  type: "mrkdwn"
+                  text: "<https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}|View failed job run>"
+

.github/workflows/on-merge.yaml

@@ -9,3 +9,26 @@ jobs:
   test:
     uses: ./.github/workflows/test.yaml
     secrets: inherit
+
+  determine-failed-job:
+    needs: test
+    if: failure()
+    runs-on: ubuntu-latest
+    outputs:
+      job_name: ${{ steps.set-job.outputs.job_name }}
+    steps:
+      - name: Determine failed job
+        id: set-job
+        run: |
+          if [ "${{ needs.test.result }}" == "failure" ]; then
+            echo "job_name=test" >> $GITHUB_OUTPUT
+          fi
+
+  notify-slack:
+    needs: [test, determine-failed-job]
+    if: failure()
+    uses: ./.github/workflows/notify-slack.yaml
+    with:
+      context_title: "main branch"
+      failed_job_name: ${{ needs.determine-failed-job.outputs.job_name }}
+    secrets: inherit

.github/workflows/on-pull-request.yaml

@@ -12,3 +12,28 @@ jobs:
 
   check_formatting:
     uses: ./.github/workflows/check_formatting.yaml
+
+  determine-failed-job:
+    needs: [test, check_formatting]
+    if: failure()
+    runs-on: ubuntu-latest
+    outputs:
+      job_name: ${{ steps.set-job.outputs.job_name }}
+    steps:
+      - name: Determine failed job
+        id: set-job
+        run: |
+          if [ "${{ needs.test.result }}" == "failure" ]; then
+            echo "job_name=test" >> $GITHUB_OUTPUT
+          elif [ "${{ needs.check_formatting.result }}" == "failure" ]; then
+            echo "job_name=check_formatting" >> $GITHUB_OUTPUT
+          fi
+
+  notify-slack:
+    needs: [test, check_formatting, determine-failed-job]
+    if: failure()
+    uses: ./.github/workflows/notify-slack.yaml
+    with:
+      context_title: "PR #${{ github.event.pull_request.number }}: ${{ github.event.pull_request.title }}"
+      failed_job_name: ${{ needs.determine-failed-job.outputs.job_name }}
+    secrets: inherit

src/flow_test/test.cairo

@@ -3029,3 +3029,8 @@ fn enable_disable_btc_tokens_flow_test() {
         .span();
     assert!(tokens == expected_tokens);
 }
+
+#[test]
+fn test_test() {
+    panic!("test");
+}