Convert file links in pdf from absolute paths to relative paths.

pdf_link_converter.py

#!/usr/bin/env python

from pathlib import Path
import sys

import fitz  # pip install pymupdf==1.23.21


def convert_to_relative_path(pdf_path: str):
    """Convert file links in pdf from absolute paths to relative paths.

    Args:
        pdf_path (str): Path to the PDF file.
    """
    pdf_dir = Path(pdf_path).parent.absolute()
    doc = fitz.open(pdf_path)
    for page in doc.pages():
        for link in page.get_links():
            if filelink := link.get("file"):
                page.delete_link(link)
                del link["file"]
                link["kind"] = 2
                link["uri"] = Path(filelink[1:]).relative_to(pdf_dir).as_posix()
                page.insert_link(link)
    doc.saveIncr()


if __name__ == "__main__":
    for pdf_path in sys.argv[1:]:
        convert_to_relative_path(pdf_path)