From e5c88e6aa6b17f41a83589384f5e0a2d70ff11d0 Mon Sep 17 00:00:00 2001
From: Slawomir Jaranowski <s.jaranowski@gmail.com>
Date: Mon, 23 Dec 2024 00:07:11 +0100
Subject: [PATCH] PR Automation - first step

---
 .github/workflows/pr-automation.yml | 165 ++++++++++++++++++++++++++++
 1 file changed, 165 insertions(+)
 create mode 100644 .github/workflows/pr-automation.yml

diff --git a/.github/workflows/pr-automation.yml b/.github/workflows/pr-automation.yml
new file mode 100644
index 0000000..6fa030f
--- /dev/null
+++ b/.github/workflows/pr-automation.yml
@@ -0,0 +1,165 @@
+# 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: PR Automation
+on:
+  workflow_call:
+    inputs:
+      default-label:
+        description: The default label to add to PR
+        required: false
+        default: 'maintenance'
+        type: string
+
+# To use we need:
+#
+# on:
+#  pull_request:
+#    types:
+#      - closed
+#      - unlabeled
+#      - demilestoned
+#  pull_request_review:
+#    types:
+#      - submitted
+#jobs:
+#  pr-automation:
+#    name: PR Automation
+#    uses: apache/maven-gh-actions-shared/.github/workflows/pr-automation.yml@v4
+
+
+
+# allow single build per branch or PR
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+# clare all permissions for GITHUB_TOKEN
+permissions: {}
+
+jobs:
+  # read current PR approval status
+  review-decision:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    outputs:
+      approved: ${{ steps.review-decision.outputs.result }}
+
+    steps:
+      - name: Get Review decision
+        id: review-decision
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
+        with:
+          result-encoding: string
+          script: |
+            const query = `query($owner:String!, $name:String!, $number:Int!) {
+              repository(name: $name, owner: $owner) {
+                pullRequest(number: $number) {
+                  reviewDecision, merged
+                }
+              }
+            }`;
+            
+            const variables = {
+              owner: context.repo.owner,
+              name: context.repo.repo,
+              number: context.issue.number
+            }
+            
+            const result = await github.graphql(query, variables)
+            console.log(result)
+            
+            return result.repository.pullRequest.reviewDecision == 'APPROVED' || result.repository.pullRequest.merged
+      - name: Result
+        run: echo "${{ steps.review-decision.outputs.result }}"
+
+  # check PR milestone - if not set - update with current opened milestone
+  milestone:
+    permissions:
+      issues: write
+      pull-requests: write
+
+    needs: review-decision
+    if: ( needs.review-decision.outputs.approved || github.event.action == 'demilestoned' ) && !github.event.pull_request.milestone
+    runs-on: ubuntu-latest
+    steps:
+      - name: Update milestone
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
+        with:
+          script: |
+            const milestones = await github.rest.issues.listMilestones({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open'
+            });
+            
+            console.log(milestones);
+            
+            if ( milestones.data.length == 0 ) {
+              throw new Error('There are no open milestones ... please create one')
+            }
+
+            if ( milestones.data.length > 1 ) {
+              throw new Error('There are more then oen open milestones ... please choose manually')
+            }
+            
+            console.log('Set milestone to: ' + milestones.data[0].title);
+            
+            const result = await github.rest.issues.update({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+              milestone: milestones.data[0].number
+            });
+            
+            console.log(result);
+
+  # check PR labels - if is empty list add one default
+  labels:
+    permissions:
+      issues: write
+      pull-requests: write
+
+    needs: review-decision
+    if: ( needs.review-decision.outputs.approved || github.event.action == 'unlabeled' ) && toJSON(github.event.pull_request.labels) == '[]'
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Set default label
+        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
+        env:
+          DEFAULT_LABEL: ${{ inputs.default-label }}
+        with:
+          script: |
+            
+            console.log(context.issue.labels);
+            
+            if ( !context.issue.labels?.length ) {
+            
+              if ( !process.env.DEFAULT_LABEL ) {
+                throw new ERROR('There are no labels on PR and default label is not set');
+              }
+            
+              const result = await github.rest.issues.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                labels: [ process.env.DEFAULT_LABEL ]
+              });
+            
+              console.log(result);
+            }