Reverse the DepthFunctions of all RenderLayers of an Evergine project

reverse_RenderLayers_DepthFunctions.py

# This script reverses all the RenderLayer's DepthFunctions of an Evergine project
import argparse
import sys
from pathlib import Path

def main():
    parser = argparse.ArgumentParser(
        description='This script will reverse the DepthFunction of all the RenderLayers in you Evergine project.',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Example:
  python3 reverse_RenderLayer_DepthFunctions.py "C:\\path\\to\\my project.weproj"
        """
    )
    
    parser.add_argument(
        'weproj_file',
        help='Path to the .weproj file to process'
    )
    args = parser.parse_args()
    weproj_path = Path(args.weproj_file)
    validate_weproj_file(weproj_path)
    
    folder_path = weproj_path.parent

    visit_files_recursively(folder_path, ext='.werl', process_fn=process_render_layer_file)

def process_render_layer_file(file_path):
    modified = False
    txt = ""
    with open(file_path, 'r+', encoding='utf-8') as f:
        lines = f.readlines()
        for line in lines:
            if "DepthFunction" in line:
                if "Greater" in line:
                    line = line.replace("Greater", "Less")
                    modified = True
                elif "Less" in line:
                    line = line.replace("Less", "Greater")
                    modified = True
            txt += line
    if modified:
        with open(file_path, "w") as f:
            print(f"Fixed '{file_path}'")
            f.write(txt)

def validate_weproj_file(path):  
    if not path.exists():
        print(f"Error: File '{path}' does not exist.")
        sys.exit(1)
    
    if not path.is_file():
        print(f"Error: '{path}' is not a file.")
        sys.exit(1)
    
    if path.suffix.lower() != '.weproj':
        print(f"Error: '{path}' is not a .weproj file.")
        sys.exit(1)

def is_bin_or_obj_folder(path):
    return path.is_dir() and (path.name == 'bin' or path.name == 'obj')

def visit_files_recursively(folder_path, ext, process_fn):
    try:
        for item in folder_path.iterdir():
            if item.name.startswith('.') or is_bin_or_obj_folder(item):
                continue
            
            if item.is_file() and item.suffix.lower() == ext:
                process_fn(item)
            elif item.is_dir():
                visit_files_recursively(item, ext, process_fn)
                
    except PermissionError as e:
        print(f"Permission denied accessing '{folder_path}': {e}")
    except Exception as e:
        print(f"Error accessing '{folder_path}': {e}")

if __name__ == '__main__':
    main()