from pathlib import Path

from pypdf import PdfWriter


def merge_pdfs(pdfs: list[Path], out_path: Path) -> Path:
    writer = PdfWriter()
    for pdf in pdfs:
        writer.append(str(pdf))
    out_path.parent.mkdir(parents=True, exist_ok=True)
    with out_path.open("wb") as f:
        writer.write(f)
    writer.close()
    return out_path