Use automerge without PR to reduce noise

Author: motoki317

.github/renovate.json5

@@ -15,6 +15,7 @@
   ],
   "platform": "github",
   "platformAutomerge": true,
+  "automergeType": "branch",
   "rebaseWhen": "conflicted",
   "onboarding": false,
   "dependencyDashboardTitle": "Renovate Dashboard 🤖",

.github/workflows/main.yml

@@ -1,9 +1,11 @@
 name: CI
 
 on:
+  # Validate on push for Renovate auto merge without PR
   push:
     branches:
       - 'master'
+      - 'renovate/**'
   pull_request:
 
 jobs:

.github/workflows/renovate-approve.yml

@@ -1,6 +1,7 @@
 name: Renovate
 
 on:
+  # For manual dispatch
   workflow_dispatch:
     inputs:
       dryRun:
@@ -11,16 +12,18 @@ on:
         description: Log-Level
         default: debug
         required: false
+  # For auto-merge - should exclude non-renovate branch dispatches in job definitions below
+  workflow_run:
+    workflows:
+      - CI
+    types:
+      - completed
   schedule:
     # 5 a.m. in JST(+9)
     - cron: "0 20 * * *"
+  # For auto-merge and rebasing
   push:
     branches: ["master"]
-    paths:
-      - .github/renovate-bot.json5
-      - .github/renovate.json5
-      - .github/renovate/**.json5
-      - .github/workflows/renovate.yml
 
 env:
   LOG_LEVEL: debug
@@ -31,6 +34,8 @@ jobs:
   renovate:
     name: Renovate
     runs-on: ubuntu-latest
+    # Exclude dispatch from non-renovate checks
+    if: ${{ !(github.event_name == 'workflow_run' && !startsWith(github.event.workflow_run.head_branch, 'renovate/')) }}
     steps:
       - name: Generate a token
         id: generate-token