ci: add dependabot with auto-merge and require E2E tests on PRs - stan

Author: stan-smith

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    groups:
+      dev-dependencies:
+        dependency-type: "development"
+      production-dependencies:
+        dependency-type: "production"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 5

.github/workflows/dependabot-automerge.yml

@@ -0,0 +1,32 @@
+name: Dependabot Auto-Merge
+
+on:
+  pull_request:
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  automerge:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]'
+
+    steps:
+      - name: Fetch Dependabot metadata
+        id: metadata
+        uses: dependabot/fetch-metadata@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Auto-approve Dependabot PR
+        run: gh pr review --approve "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Enable auto-merge for Dependabot PR
+        run: gh pr merge --auto --squash "$PR_URL"
+        env:
+          PR_URL: ${{ github.event.pull_request.html_url }}
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/e2e-tests.yml

@@ -1,7 +1,10 @@
 name: E2E Tests
 
 on:
-  # Runs after unit tests complete successfully
+  # Runs on PRs so we can gate merges on E2E results
+  pull_request:
+    branches: ["main", "master"]
+  # Runs after unit tests complete successfully on push
   workflow_run:
     workflows: ["Run Tests"]
     types:
@@ -11,7 +14,7 @@ on:
 jobs:
   e2e-tests:
     runs-on: ubuntu-latest
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    if: ${{ github.event_name == 'pull_request' || github.event.workflow_run.conclusion == 'success' }}
 
     steps:
       - name: Checkout code