feat(kustomize): stop kustomize run, if there is nothing to process (#…

…3681)

* stop kustomize run, if there is nothing to process

* remove pip upgrade

.github/workflows/pr-test.yml

@@ -99,7 +99,6 @@ jobs:
       - name: Build & install checkov package
         run: |
           pipenv --python ${{ matrix.python }}
-          pipenv run pip install --upgrade pip
           pipenv run pip install pytest pytest-xdist
           pipenv run python setup.py sdist bdist_wheel
           bash -c 'pipenv run pip install dist/checkov-*.whl'

checkov/kustomize/runner.py

@@ -421,6 +421,10 @@ def run_kustomize_to_k8s(
         self, root_folder: str | None, files: list[str] | None, runner_filter: RunnerFilter
     ) -> None:
         kustomize_dirs = find_kustomize_directories(root_folder, files, runner_filter.excluded_paths)
+        if not kustomize_dirs:
+            # nothing to process
+            return
+
         for kustomize_dir in kustomize_dirs:
             self.kustomizeProcessedFolderAndMeta[kustomize_dir] = self._parseKustomization(kustomize_dir)
         self.target_folder_path = tempfile.mkdtemp()
@@ -474,6 +478,11 @@ def run(
 
         self.run_kustomize_to_k8s(root_folder, files, runner_filter)
         report = Report(self.check_type)
+
+        if not self.kustomizeProcessedFolderAndMeta:
+            # nothing to process
+            return report
+
         target_dir = ""
         try:
             k8s_runner = K8sKustomizeRunner()