From 019ab885723ff4fb77a3486f13c22ddf64e3849d Mon Sep 17 00:00:00 2001
From: Mike Kruskal <mkruskal@google.com>
Date: Fri, 25 Aug 2023 08:38:59 -0700
Subject: [PATCH] Add a script for cleaning up stale copybara PRs

This was tested locally over a smaller set of PRs, resulting in:
https://github.com/protocolbuffers/protobuf/pull/13557

PiperOrigin-RevId: 560101257
---
 .github/workflows/janitor.yml | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 .github/workflows/janitor.yml

diff --git a/.github/workflows/janitor.yml b/.github/workflows/janitor.yml
new file mode 100644
index 000000000000..86f746f661b5
--- /dev/null
+++ b/.github/workflows/janitor.yml
@@ -0,0 +1,23 @@
+name: Protobuf Janitor
+
+on:
+  schedule:
+    # Run daily at 10 AM UTC (2 AM PDT)
+    - cron: 0 10 * * *
+  workflow_dispatch:
+
+jobs:
+  stale-prs:
+    - name: Close Stale Copybara PRs
+      runs-on: ubuntu-latest
+      run: |
+        set -ex
+        STALE_PRS=$(gh pr list --author "app/copybara-service" --limit 500 \
+            --json "number" --search "updated:<=$(date --date="-7 day" +%F)" \
+          | jq ".[].number")
+        for pr in $(STALE_PRS); do
+          echo "Closing #$pr..."
+          gh pr close --comment "Auto-closing Copybara pull request" --delete-branch "$pr"
+        done
+      env:
+        GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
\ No newline at end of file