refactor: improve manifest.json generation and update check for changes

.gitea/workflows/wp-plugin-release.yml

@@ -57,7 +57,9 @@ jobs:
         run: |
           MAIN_FILE="${{ inputs.main_file }}"
           python3 - <<'PY'
-          import json, re, os
+          import json, os, re
+          from pathlib import Path
+
           main_file = os.environ["MAIN_FILE"]
 
           with open(main_file, "r", encoding="utf-8") as handle:
@@ -78,9 +80,13 @@ jobs:
               "author_url": read_field("Author URI"),
           }
 
-          with open("manifest.json", "w", encoding="utf-8") as handle:
+          output = json.dumps(manifest, ensure_ascii=False, indent=2)
-              json.dump(manifest, handle, ensure_ascii=False, indent=2)
+          path = Path("manifest.json")
 
+          if path.exists() and path.read_text(encoding="utf-8") == output:
+              print("manifest.json ongewijzigd")
+          else:
+              path.write_text(output, encoding="utf-8")
               print("manifest.json aangemaakt/bijgewerkt")
           PY
         env:
@@ -88,7 +94,7 @@ jobs:
 
       - name: Commit & push manifest.json (optioneel)
         run: |
-          if git diff --quiet -- manifest.json; then
+          if ! git status --short -- manifest.json | grep -q .; then
             echo "manifest.json ongewijzigd; geen commit nodig."
             exit 0
           fi