From 05c6feecd0f9dc1b78895df0106905ab8a8f05bc Mon Sep 17 00:00:00 2001
From: Michael Kubacki <michael.kubacki@microsoft.com>
Date: Mon, 22 Jul 2024 17:42:43 -0400
Subject: [PATCH] .github/workflows/request-reviews.yml: Add workflow

Adds a new GitHub workflow to automatically add reviewers to pull
requests when they are opened, reopened, synchronized, and if a draft
pull request is marked as ready for review. The workflow will not
run on draft pull requests.

The workflow is meant to be simple to understand and modify, relying
on existing logic in GetMaintainer.py to determine the relevant
reviewers and using simple Python GitHub REST API wrappers with the
default GitHub token for authentication.

Future changes may optimize the workflow.

Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com>
---
 .github/workflows/request-reviews.yml | 72 +++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 .github/workflows/request-reviews.yml

diff --git a/.github/workflows/request-reviews.yml b/.github/workflows/request-reviews.yml
new file mode 100644
index 000000000000..8399c1cf3512
--- /dev/null
+++ b/.github/workflows/request-reviews.yml
@@ -0,0 +1,72 @@
+
+# This workflow automatically adds the appropriate reviewers to a pull request.
+#
+# The workflow directly reuses logic in the BaseTools/Scripts/GetMaintainer.py script
+# to determine the appropriate reviewers, so it matches what a user would see running
+# the script locally.
+#
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+
+name: Add Pull Request Reviewers
+
+on:
+  pull_request:
+    branches:
+      - master
+    types: [opened, ready_for_review, reopened, synchronize]
+
+env:
+  GET_MAINTAINER_REL_PATH: "BaseTools/Scripts/GetMaintainer.py"
+
+jobs:
+  auto-request-review:
+    name: Add Pull Request Reviewers
+    if: '! github.event.pull_request.draft'
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      issues: write
+      pull-requests: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
+
+      - name: Install PIP Modules
+        run: pip install edk2-pytool-library edk2-pytool-extensions requests
+
+      - name: Add Reviewers to Pull Request
+        shell: python
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          ORG_NAME: ${{ github.repository_owner }}
+          PR_NUMBER: ${{ github.event.number}}
+          REPO_NAME: ${{ github.event.pull_request.base.repo.name }}
+          TARGET_BRANCH: ${{ github.event.pull_request.base.ref }}
+          WORKSPACE_PATH: ${{ github.workspace }}
+        run: |
+            import os
+            import sys
+            sys.path.append(os.path.join(os.environ['WORKSPACE_PATH'], ".github"))
+            from scripts import GitHub
+
+            WORKSPACE_PATH = os.environ['WORKSPACE_PATH']
+            GET_MAINTAINER_LOCAL_PATH = os.path.join(WORKSPACE_PATH, os.environ['GET_MAINTAINER_REL_PATH'])
+
+            reviewers = GitHub.get_reviewers_for_current_branch(WORKSPACE_PATH, GET_MAINTAINER_LOCAL_PATH, os.environ['TARGET_BRANCH'])
+            if not reviewers:
+                print("::notice title=No Reviewers Found!::No reviewers found for this PR.")
+                sys.exit(1)
+
+            print(f"::notice title=Reviewer List::Reviewers found for PR {os.environ['PR_NUMBER']}:\n{', '.join(reviewers)}")
+
+            GitHub.add_reviewers_to_pr(os.environ['GH_TOKEN'], os.environ['ORG_NAME'], os.environ['REPO_NAME'], os.environ['PR_NUMBER'], reviewers)