[Github Actions] - Start Snapshot Build (#24230)

* Create start_snapshot_build.yml

* Update start_snapshot_build.yml

* Update start_snapshot_build.yml

* Update start_snapshot_build.yml

* Update CI.md

Co-authored-by: Danny McCormick <dannymccormick@google.com>

.github/workflows/start_snapshot_build.yml

+# 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.
+
+# This workflow will update apache beam master branch with next release version
+# and cut release branch for current development version.
+
+# To learn more about GitHub Actions in Apache Beam check the CI.md
+
+# This workflow will create an empty PR and start gradle publish job.
+
+name: Start Snapshot Build
+
+on:
+  workflow_dispatch:
+    inputs:
+      USER_REMOTE_URL:
+        description: Your beam repo URL
+        required: true
+        default: https://github.com/apache/beam.git
+
+jobs:
+  start_snapshot_build:
+    runs-on: [self-hosted, ubuntu-20.04]
+    env:
+      REMOTE_NAME: remote_repo
+      REMOTE_URL: ${{ github.event.inputs.USER_REMOTE_URL }}
+      BRANCH_NAME: snapshot_build
+    steps:
+      - name: Install Hub
+        run: |
+          cd ~
+          wget https://github.com/github/hub/releases/download/v2.14.2/hub-linux-amd64-2.14.2.tgz
+          tar zvxvf hub-linux-amd64-2.14.2.tgz
+          sudo ./hub-linux-amd64-2.14.2/install
+          echo "eval "$(hub alias -s)"" >> ~/.bashrc
+      - uses: actions/checkout@v3
+      - name: Set git config
+        run: |
+          git config user.name $GITHUB_ACTOR
+          git config user.email actions@"$RUNNER_NAME".local
+      - name: Create Snapshot Branch
+        run: |
+          git remote add ${REMOTE_NAME} ${REMOTE_URL}
+          git checkout -b ${BRANCH_NAME}
+          touch empty_file.txt
+          git add -A
+          git commit -m "Add empty file in order to create PR"
+          git push -f ${REMOTE_NAME}
+      - name: Create Pull Request
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          hub pull-request -F- <<<"[DO NOT MERGE]Start snapshot build for release process 
+          
+          
+          Run Gradle Publish"
+          
+          echo "NOTE: If there is no jenkins job started, please comment generated PR with: Run Gradle Publish"
+          echo "Things remained you need to do manually after build successful:"
+          echo "1. Close this generated PR in github website."
+          echo "2. Delete your remote branch ${BRANCH_NAME} form your beam repo in github website."
\ No newline at end of file

CI.md

@@ -127,6 +127,11 @@ Service Account shall have following permissions ([IAM roles](https://cloud.goog
 
 ### Release Preparation and Validation Workflows
 
+#### Start Snapshot Build - [start_snapshot_build.yml](.github/workflows/start_snapshot_build.yml)
+| Job                   | Description                                                             | Pull Request Run | Direct Push/Merge Run | Scheduled Run | Requires GCP Credentials |
+|-----------------------|-------------------------------------------------------------------------|------------------|-----------------------|---------------|--------------------------|
+| Start Snapshot Build  | Creates PR against apache:master and triggers a job to build a snapshot | No               | No                    | No            | No                       |
+
 #### Choose RC Commit - [choose_rc_commit.yml](.github/workflows/choose_rc_commit.yml)
 
 | Job              | Description                                                                                         | Pull Request Run | Direct Push/Merge Run | Scheduled Run | Requires GCP Credentials |