Improvements to auto-merge action with Dependabot.

.github/workflows/automerge.yml

@@ -0,0 +1,28 @@
+name: Auto-Merge Dependabot PRs
+
+on:
+  pull_request:
+
+jobs:
+  automerge:
+    name: Auto-Merge Dependabot PRs
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      pull-requests: write
+      contents: write
+
+    if: github.actor == 'dependabot[bot]'
+    steps:
+      - name: Get Dependabot metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Enable auto-merge
+        run: |
+          gh pr review --approve "$PR_URL"
+          gh pr merge --squash --auto "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/build.yml

@@ -59,20 +59,4 @@ jobs:
   validate:
     name: Validate
     uses: ./.github/workflows/validate.yml
-    secrets: inherit
-
-  automerge:
-    name: "Auto Approve"
-    needs: [build, validate]
-
-    runs-on: ubuntu-latest
-
-    permissions:
-      pull-requests: write
-      contents: write
-
-    steps:
-      - uses: fastify/github-action-merge-dependabot@v3
-        with:
-          target: major
-          use-github-auto-merge: true
+    secrets: inherit