From 9a897aa450e68e4ea1185f68ecb183f5fdaabb36 Mon Sep 17 00:00:00 2001
From: Takashi Kokubun <takashikkbn@gmail.com>
Date: Tue, 12 Aug 2025 10:54:42 -0700
Subject: [PATCH] Add a workflow for dependabot automerge

---
 .github/workflows/dependabot_automerge.yml | 30 ++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 .github/workflows/dependabot_automerge.yml

diff --git a/.github/workflows/dependabot_automerge.yml b/.github/workflows/dependabot_automerge.yml
new file mode 100644
index 0000000..3a711b1
--- /dev/null
+++ b/.github/workflows/dependabot_automerge.yml
@@ -0,0 +1,30 @@
+name: Dependabot auto-merge
+on:
+  pull_request:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.user.login == 'dependabot[bot]' && github.repository == 'ruby/erb'
+    steps:
+      - name: Dependabot metadata
+        uses: dependabot/fetch-metadata@v2
+        id: metadata
+
+      - name: Wait for status checks
+        uses: lewagon/wait-on-check-action@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          ref: ${{ github.event.pull_request.head.sha || github.sha }}
+          check-regexp: 'build \(.*\)'
+          wait-interval: 30
+
+      - name: Auto-merge for Dependabot PRs
+        run: gh pr merge --auto --rebase "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GITHUB_TOKEN: ${{ secrets.MATZBOT_DEPENDABOT_MERGE_TOKEN }}