fix: Revised error messages and filename sanitization processing

- Improved error messages within the `find_library_file` function to include directory names
- Organized comments within the `sanitize_filename` function
- Improved error messages within the `split_library` function to include directory names

Author: jun-shiromizu

skills/excalidraw-diagram-generator/scripts/split-excalidraw-library.py

@@ -26,121 +26,121 @@
 def sanitize_filename(name: str) -> str:
     """
     Sanitize icon name to create a valid filename.
-    
+
     Args:
         name: Original icon name
-        
+
     Returns:
         Sanitized filename safe for all platforms
     """
     # Replace spaces with hyphens
     filename = name.replace(' ', '-')
-    
+
     # Remove or replace special characters
     filename = re.sub(r'[^\w\-.]', '', filename)
-    
+
     # Remove multiple consecutive hyphens
     filename = re.sub(r'-+', '-', filename)
-    
+
     # Remove leading/trailing hyphens
     filename = filename.strip('-')
-    
+
     return filename
 
 
 def find_library_file(directory: Path) -> Path:
     """
     Find the .excalidrawlib file in the given directory.
-    
+
     Args:
         directory: Directory to search
-        
+
     Returns:
         Path to the library file
-        
+
     Raises:
         SystemExit: If no library file or multiple library files found
     """
     library_files = list(directory.glob('*.excalidrawlib'))
-    
+
     if len(library_files) == 0:
         print(f"Error: No .excalidrawlib file found in {directory}")
-        print(f"Please place a .excalidrawlib file in this directory first.")
+        print(f"Please place a .excalidrawlib file in {directory} first.")
         sys.exit(1)
-    
+
     if len(library_files) > 1:
         print(f"Error: Multiple .excalidrawlib files found in {directory}")
-        print(f"Please keep only one library file in the directory.")
+        print(f"Please keep only one library file in {directory}.")
         sys.exit(1)
-    
+
     return library_files[0]
 
 
 def split_library(library_dir: str) -> None:
     """
     Split an Excalidraw library file into individual icon files.
-    
+
     Args:
         library_dir: Path to the directory containing the .excalidrawlib file
     """
     library_dir = Path(library_dir)
-    
+
     if not library_dir.exists():
         print(f"Error: Directory not found: {library_dir}")
         sys.exit(1)
-    
+
     if not library_dir.is_dir():
         print(f"Error: Path is not a directory: {library_dir}")
         sys.exit(1)
-    
+
     # Find the library file
     library_path = find_library_file(library_dir)
     print(f"Found library: {library_path.name}")
-    
+
     # Load library file
     print(f"Loading library data...")
     with open(library_path, 'r', encoding='utf-8') as f:
         library_data = json.load(f)
-    
+
     # Validate library structure
     if 'libraryItems' not in library_data:
         print("Error: Invalid library file format (missing 'libraryItems')")
         sys.exit(1)
-    
+
     # Create icons directory
     icons_dir = library_dir / 'icons'
     icons_dir.mkdir(exist_ok=True)
     print(f"Output directory: {library_dir}")
-    
+
     # Process each library item (icon)
     library_items = library_data['libraryItems']
     icon_list = []
-    
+
     print(f"Processing {len(library_items)} icons...")
-    
+
     for item in library_items:
         # Get icon name
         icon_name = item.get('name', 'Unnamed')
-        
+
         # Create sanitized filename
         filename = sanitize_filename(icon_name) + '.json'
-        
+
         # Save icon data
         icon_path = icons_dir / filename
         with open(icon_path, 'w', encoding='utf-8') as f:
             json.dump(item, f, ensure_ascii=False, indent=2)
-        
+
         # Add to reference list
         icon_list.append({
             'name': icon_name,
             'filename': filename
         })
-        
+
         print(f"  ✓ {icon_name} → {filename}")
-    
+
     # Sort icon list by name
     icon_list.sort(key=lambda x: x['name'])
-    
+
     # Generate reference.md
     library_name = library_path.stem
     reference_path = library_dir / 'reference.md'
@@ -150,14 +150,14 @@ def split_library(library_dir: str) -> None:
         f.write("## Available Icons\n\n")
         f.write("| Icon Name | Filename |\n")
         f.write("|-----------|----------|\n")
-        
+
         for icon in icon_list:
             f.write(f"| {icon['name']} | `icons/{icon['filename']}` |\n")
-        
+
         f.write("\n## Usage\n\n")
         f.write("Each icon JSON file contains the complete `elements` array needed to render that icon in Excalidraw.\n")
         f.write("You can copy the elements from these files into your Excalidraw diagrams.\n")
-    
+
     print(f"\n✅ Successfully split library into {len(icon_list)} icons")
     print(f"📄 Reference file created: {reference_path}")
     print(f"📁 Icons directory: {icons_dir}")
@@ -174,7 +174,7 @@ def main():
         print("  python split-excalidraw-library.py skills/excalidraw-diagram-generator/libraries/aws-architecture-icons/")
         print("\nNote: The directory should contain a .excalidrawlib file.")
         sys.exit(1)
-    
+
     library_dir = sys.argv[1]
     split_library(library_dir)