Adding CI validation for manifest.json

.github/workflows/validate-manifest.yml

@@ -0,0 +1,37 @@
+name: Validate manifest.json
+
+on: push
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
+      - name: Validate manifest.json
+        id: validate_manifest
+        run: |
+          echo "Validating manifest files"
+          for item in $(jq -c -r '.lists.[].file | select( . != null )' manifest.json); do
+            if test -f $item; then
+              echo "$item file is listed in the manifest, and exists in the repository"
+            else
+              echo "::error file=manifest.json,title=Invalid-Manifest::$item file is listed in the manifest, but the file does not exist"
+              exit 1
+            fi
+          done
+
+          echo "Validating manifest urls"
+          for item in $(jq -c -r '.lists.[].url | select( . != null )' manifest.json); do
+            urlstatus=$(curl -H 'Cache-Control: no-cache' -o /dev/null --silent --head --write-out "$URL %{http_code}" "$item")
+            if [ $urlstatus -ne 200 ]; then
+              echo "::error file=manifest.json,title=Invalid-Manifest::$item URL is listed in the manifest, but the received HTTP status of $urlstatus"
+              exit 1
+            fi
+          done
+
+          echo "Validation complete"