Update Slack notifications (#48)

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: Continuous Integration
 on:
   push:
     branches:
-      - '**'
+      - master
   pull_request:
     branches:
       - master
@@ -49,19 +49,57 @@ jobs:
         env:
           NGINX_PLUS_VERSION: nightly
 
-  job-failure:
-    name: Report Failures
+  notify:
+    name: Notify
     runs-on: ubuntu-18.04
-    if: failure()
+    needs: build
+    if: always() && github.ref == 'refs/heads/master'
     steps:
-      - name: Slack Notification
-        uses: rtCamp/action-slack-notify@master
+      - name: Workflow Status
+        id: check
+        uses: martialonline/workflow-status@v1
+      - name: Output Variables
+        id: commit
+        run: |
+          echo "::set-output name=sha::$(echo ${GITHUB_SHA} | cut -c1-7)"
+          echo "::set-output name=repo::$(echo ${GITHUB_REPOSITORY} | cut -d '/' -f 2)"
+      - name: Send Notification
+        uses: 8398a7/action-slack@v3
+        if: 
+          steps.check.outputs.status == 'failure' || 
+          steps.check.outputs.status == 'cancelled'
+        with:
+          status: custom
+          custom_payload: |
+            {
+              username: 'Github',
+              icon_emoji: ':octocat:',
+              mention: 'channel',
+              attachments: [{
+                title: '${{ steps.commit.outputs.repo }} ${{ github.workflow }} pipeline has failed',
+                color: '${{ steps.check.outputs.status }}' == 'failure' ? 'danger' : 'warning',
+                fields: [{
+                  title: 'Commit Hash',
+                  value: '${{ steps.commit.outputs.sha }}',
+                  short: true
+                },
+                {
+                  title: 'Author',
+                  value: '${{ github.actor }}',
+                  short: true
+                },
+                {
+                  title: 'Commit Message',
+                  value: `${{ github.event.head_commit.message }}`,
+                  short: false
+                },
+                {
+                  title: 'Pipeline URL',
+                  value: 'https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}',
+                  short: false
+                }]
+              }]
+            }
         env:
-          SLACK_CHANNEL: ${{ secrets.SLACK_CHANNEL }}
-          SLACK_COLOR: '#3278BD'
-          SLACK_ICON_EMOJI: ':github:'
-          SLACK_TITLE: Pipeline Failure
-          SLACK_MESSAGE: 'The pipeline has failed, please check the logs.'
-          SLACK_FOOTER: 'https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}'
-          SLACK_USERNAME: GitHub-Actions
-          SLACK_WEBHOOK: ${{ secrets.SLACK_HOOK }}
+          GITHUB_TOKEN: ${{ github.token }}
+          SLACK_WEBHOOK_URL: ${{ secrets.SLACK_WEBHOOK }}