fix error message when empty input image

comfy-nodes/input_image.py

@@ -55,10 +55,14 @@ class ShellAgentPluginInputImage:
     @classmethod
     def VALIDATE_INPUTS(s, input_name, default_value, description=""):
         image = default_value
+        
         if image.startswith("http"):
             return True
         
-        if not folder_paths.exists_annotated_filepath(image):
+        if not os.path.isfile(image):
+            return "Invalid image file: please check if the image is empty or invalid"
+        
+        if folder_paths.exists_annotated_filepath(image):
             return "Invalid image file: {}".format(image)
 
         return True

dependency_checker.py

@@ -283,7 +283,10 @@ def resolve_dependencies(prompt, custom_dependencies): # resolve custom nodes an
             print(f"failed to resolve repo info of {custom_node}")
         requirement_file = os.path.join(BASE_PATH, custom_node.replace(".", "/"), "requirements.txt")
         if os.path.isfile(requirement_file):
-            requirements_lines += open(requirement_file).readlines()
+            try:
+                requirements_lines += open(requirement_file).readlines()
+            except:
+                pass
     requirements_lines = list(set(requirements_lines))
     requirements_packages = [package_name for package_name, version_specifier in map(split_package_version, requirements_lines) if package_name is not None]
     package_names = set(requirements_packages + extra_packages)