build: automatically merge dependabot PRs on dependencies branch (if …

…they pass tests) (#2798)

* build: enable auto-merge for dependabot PRs

* build: create a new dependencies branch each week

* fix: move permissions key to top of auto-approve job

* fix: create dependencies branch on Saturdays

* build: fix spelling of dependencies

* fix: correct spelling of dependencies

* fix: only create new dependencies branch when old one is closed/merged

.github/workflows/auto-approve.yml

@@ -2,11 +2,12 @@ name: Auto approve
 
 on: pull_request_target
 
+permissions:
+  pull-requests: write
+
 jobs:
   auto-approve:
     runs-on: ubuntu-latest
-    permissions:
-      pull-requests: write
     if: github.actor == 'dependabot[bot]'
     steps:
       - uses: hmarr/auto-approve-action@v4

.github/workflows/auto-merge.yml

@@ -0,0 +1,17 @@
+name: Dependabot auto-merge
+
+on: pull_request
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  dependabot:
+    runs-on: ubuntu-latest
+    if: github.actor == 'dependabot[bot]' && github.ref == 'refs/heads/dependencies'
+    steps:
+      - name: Enable auto-merge for Dependabot PRs
+        run: gh pr merge --auto --merge ${{ github.event.pull_request.number }}
+    env:
+      GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/dependencies-branch.yml

@@ -0,0 +1,24 @@
+name: Dependabot auto-merge
+
+on:
+  pull_request:
+    branches:
+      - dependencies
+    types:
+      - closed
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  make_branch:
+    if: github.event.pull_request.merged == true
+    runs-on: ubuntu-latest
+    steps:
+      - name: Create dependencies branch
+        uses: peterjgrainger/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          branch: "dependencies"