Add daily sync checks

.github/workflows/daily.sync.yml

@@ -0,0 +1,46 @@
+name: sync daily run
+
+on:
+  # Non hour start chosen deliberately https://docs.github.com/en/actions/learn-github-actions/events-that-trigger-workflows#scheduled-events
+  schedule:
+    - cron: '6 12 * * *'
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - .github/workflows/daily.sync.yml
+
+jobs:
+  sync_simple:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3.0.2
+      - name: run sync
+        run: ./sync.sh
+      - name: Show `git diff`` output
+        run: git diff
+      # Only fail in CI when there is diff content NOT on a pull request
+      - name: Check only composer changed
+        if: steps.diff.outcome  != 'success' && github.event_name != 'pull_request'
+        run: |
+          GIT_CHANGES=$(git status --porcelain=v1 -- ':!dist/vendor/composer' ':!dist/vendor/autoload.php')
+          if [[ $GIT_CHANGES ]]; then
+              exit 1
+          fi
+  sync_composer:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3.0.2
+      - name: run sync
+        run: ./sync.sh -u
+      - name: Show `git diff`` output
+        run: git diff
+      # Only fail in CI when there is diff content NOT on a pull request
+      - name: Check only composer changed
+        if: steps.diff.outcome  != 'success' && github.event_name != 'pull_request'
+        run: |
+          GIT_CHANGES=$(git status --porcelain=v1 -- ':!dist/vendor/composer' ':!dist/vendor/autoload.php')
+          if [[ $GIT_CHANGES ]]; then
+              exit 1
+          fi