"""Constants shared across build scripts."""
from pathlib import Path


def get_target_directories(root_dir: Path) -> list[Path]:
    """
    Get all target directories (common, lambda subdirs, fargate subdirs).
    
    Args:
        root_dir: Root directory of the project
    
    Returns:
        List of Path objects for all target directories
    """
    common_dir = root_dir / "common"
    lambda_dir = root_dir / "lambda"
    fargate_dir = root_dir / "fargate"
    
    target_dirs = []
    
    # Add common directory first
    if common_dir.exists():
        target_dirs.append(common_dir)
    
    # Add lambda subdirectories
    if lambda_dir.exists():
        lambda_dirs = sorted([d for d in lambda_dir.iterdir() if d.is_dir() and not d.name.startswith('.mypy')])
        target_dirs.extend(lambda_dirs)
    
    # Add fargate subdirectories
    if fargate_dir.exists():
        fargate_dirs = sorted([d for d in fargate_dir.iterdir() if d.is_dir() and not d.name.startswith('.mypy')])
        target_dirs.extend(fargate_dirs)
    
    return target_dirs