Initial GitHub Workflow triggering archery bot

.github/workflows/pr_bot.yml

@@ -0,0 +1,39 @@
+name: pr-bot
+on:
+  pull_request:
+    types:
+      - opened
+      - converted_to_draft
+      - ready_for_review
+  pull_request_review:
+    types:
+      - submitted
+  push:
+
+jobs:
+  run-pr-bot:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Arrow
+        uses: actions/checkout@v3
+        with:
+          path: arrow
+          # fetch the tags for version number generation
+          fetch-depth: 0
+      - name: Set up Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: 3.8
+      - name: Install Archery and Crossbow dependencies
+        run: pip install -e arrow/dev/archery[bot]
+      - name: Handle PR workflow event
+        env:
+          ARROW_GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          CROSSBOW_GITHUB_TOKEN: ${{ secrets.CROSSBOW_GITHUB_TOKEN }}
+        run: |
+          archery trigger-bot \
+            --event-name ${{ github.event_name }} \
+            --event-payload ${{ github.event_path }}

dev/archery/archery/cli.py

@@ -783,10 +783,18 @@ def integration(with_all=False, random_seed=12345, **args):
 def trigger_bot(event_name, event_payload, arrow_token):
     from .bot import CommentBot, actions
 
-    event_payload = json.loads(event_payload.read())
+    class PullRequestWorkflowBot:
+        def handle(self, event_name, event_payload):
+            print(f"PullRequestWorkflowBot handle: {event_name} - {event_payload}")
+
 
-    bot = CommentBot(name='github-actions', handler=actions, token=arrow_token)
-    bot.handle(event_name, event_payload)
+    event_payload = json.loads(event_payload.read())
+    if 'comment' in event_name:
+        bot = CommentBot(name='github-actions', handler=actions, token=arrow_token)
+        bot.handle(event_name, event_payload)
+    else:
+        bot = PullRequestWorkflowBot()
+        bot.handle(event_name, event_payload)
 
 
 @archery.group("linking")