Merge pull request 'feat: reusable Renovate config validation workflow (renovate-config-validator)' (#3) from feat/renovate-config-validate-workflow into main

Reviewed-on: #3

.gitea/workflows/pr.yaml

@@ -0,0 +1,24 @@
+name: PR Checks
+on:
+  workflow_dispatch:
+  pull_request:
+
+jobs:
+  # All workflow yaml parse + renovate-config-validator on central config
+  validate:
+    runs-on: ubuntu-latest
+    container: renovate/renovate:43
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+      - name: Parse all workflow yaml files
+        # the renovate image ships its own python + pyyaml
+        run: |
+          python3 - <<'EOF'
+          import glob, yaml
+          for f in glob.glob('.gitea/workflows/*.yaml'):
+              with open(f) as fh:
+                  yaml.safe_load(fh.read())
+              print(f, 'ok')
+          EOF
+      - name: Validate central Renovate config
+        run: renovate-config-validator config.json

.gitea/workflows/validate.yaml

@@ -0,0 +1,32 @@
+name: Renovate Config Validation
+
+on:
+  workflow_call:
+    inputs:
+      config_path:
+        description: "Path to the Renovate config to validate (a renovate.json in the calling repo). Non-blocking when absent."
+        required: false
+        type: string
+        default: "renovate.json"
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    container: renovate/renovate:43
+    steps:
+      - name: Checkout caller repo
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7
+
+      - name: Validate the repo's Renovate config
+        run: |
+          FILE="${{ inputs.config_path }}"
+          if [ ! -f "$FILE" ]; then
+            echo "No Renovate config at $FILE — skipping validation (this repo has no renovate.json)."
+            exit 0
+          fi
+          echo "Validating $FILE"
+          # renovate-config-validator parses the file against the official
+          # Renovate schema and catches: invalid fields, bad regexes in
+          # customManagers, forbidden *Template fields (e.g. registryUrlsTemplate),
+          # malformed packageRules, etc. It does NOT run Renovate itself.
+          renovate-config-validator "$FILE"