feat: send email on ddl change

.github/workflows/notify-on-ddl-change.yml

@@ -0,0 +1,62 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Notify on DDL Change
+
+on:
+  pull_request:
+    types:
+      - closed
+
+jobs:
+  notify:
+    if: >-
+      github.event.pull_request.merged == true && 
+      contains(github.event.pull_request.labels.*.name, 'ddl-change')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          sparse-checkout: sql/updates/
+
+      - name: Get added file in sql/updates/
+        id: get_sql_file
+        run: |
+          FILE=$(git diff --name-only --diff-filter=A \
+            ${{ github.event.pull_request.base.sha }} \
+            ${{ github.event.pull_request.merge_commit_sha }} \
+            -- 'sql/updates/')
+          echo "sql_file=$FILE" >> $GITHUB_OUTPUT
+      - name: Send email
+        uses: dawidd6/action-send-mail@v7
+        with:
+          server_address: smtp.gmail.com
+          server_port: 465
+          secure: true
+          username: ${{secrets.MAIL_USERNAME}}
+          password: ${{secrets.MAIL_PASSWORD}}
+          subject: Actions Required After Pulling Latest Update
+          to: dev@texera.apache.org
+          from: ${{ github.event.pull_request.user.login }}
+          body: |
+            Hi all,
+            We have merged PR #${{ github.event.pull_request.number }} (${{ github.event.pull_request.html_url }}): ${{github.event.pull_request.title}}. To incorporate the change, please apply ${{ steps.get_sql_file.outputs.sql_file }} to your local Postgres instance and run common/dao/src/main/scala/org/apache/texera/dao/JooqCodeGenerator.scala to generate jooq tables. 
+
+            Best,
+            ${{ github.event.pull_request.user.login }}
+          reply_to: dev@texera.apache.org

LICENSE

@@ -231,6 +231,10 @@ This product bundles code derived from TypeFox monaco-languageclient:
   Copyright (c) 2024 TypeFox and others.
   Source: https://github.com/TypeFox/monaco-languageclient
 
+This product incorporates dawidd6-action-send-mail as a GitHub Actions workflow dependency:
+  Copyright (c) 2020 Dawid Dziurla
+  Source: https://github.com/dawidd6/action-send-mail
+
 This product includes SVG icons from SVGRepo:
   - frontend/src/assets/svg/operator-view-result.svg
   - frontend/src/assets/svg/operator-reuse-cache-valid.svg