ci: validate renovate

.github/workflows/validate-renovate.yml

@@ -0,0 +1,56 @@
+name: validate renovate
+
+on:
+  pull_request:
+    paths:
+      - 'renovate.json'
+      - '.github/workflows/validate-renovate.yml'
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  actionlint:
+    name: actionlint with reviewdog
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: run lint
+        id: lint
+        run: |
+          # renovate: npm:renovate
+          ver="37.291.0"
+          # pinned on exact version
+          package="renovate@=$ver"
+          echo "npx: $(npx --version)"
+          echo "installing: $package..."
+          H="$(mktemp)"
+
+          # let's do main part, but avoid pipefail
+          (npx --yes --package "$package" -- renovate-config-validator --strict || true)\
+            | ruby -e 'File.open(ENV[?H], ?w) {|r| while gets; puts $_; $> = r if $_.chomp == "WARN: Config migration necessary" ;end; }'
+
+          # init and extract
+          OLD="$(mktemp)"
+          mv "$OLD" "${OLD}.old.txt"
+          NEW="$(mktemp)"
+          mv "$NEW" "${NEW}.new.txt"
+          jq -rs '.old' < "$H" > "$OLD"
+          jq -rs '.new' < "$H" > "$NEW"
+
+          DIFF_TO_BE_REPORTED="$(mktemp)"
+          mv "$DIFF_TO_BE_REPORTED" "${DIFF_TO_BE_REPORTED}.diff"
+          git diff --no-index "$OLD" "$NEW" >> "$DIFF_TO_BE_REPORTED"
+      - name: report diff
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          DIFF_TEXT: ${{ steps.lint.outputs.DIFF }}
+          URL: ${{ github.event.pull_request.html_url }}
+        run:
+          COMMENT_BUFFER="$(mktemp)"
+
+          printf "I'm sorry, but this config should be migrated. Please apply following patch file to proceed:" >> "$COMMENT_BUFFER"
+          cat "$DIFF_TO_BE_REPORTED" >> "$COMMENT_BUFFER"
+
+          gh pr comment -F "$COMMENT_BUFFER" "${URL}"

renovate.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": [
-    "config:base",
+    "config:recommended",
     "github>ksrgtech/renovate-crate-automerge"
   ],
   "customManagers": [