A python script to list the pages of drawio file and export the specified pages.

drawio-export.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import os
import sys
from pathlib import Path
import platform
import xml.etree.ElementTree as ET

# Define the output figure format. Could be 'svg', 'png', 'pdf', etc.
FIGURE_FMT = "svg"

def get_drawio_executable():
    """Find the draw.io executable based on the operating system."""
    system = platform.system()
    if system == "Windows":
        exe = "draw.io.exe"
    elif system == "Darwin":
        exe = "/Applications/draw.io.app/Contents/MacOS/draw.io"
    elif system == "Linux":
        exe = "draw.io"
    else:
        raise RuntimeError(f"Unsupported platform: {system}")
    assert Path(exe).is_file(), f"Draw.io executable not found: {exe}"
    return exe

def get_pages(filename):
    """Extract page information from a drawio file. Returns a dictionary mapping page numbers (1-based) to page names."""
    root = ET.parse(filename).getroot()
    pages = {}
    for page, elm in enumerate(root.findall(".//diagram"), start=1):
        pages[page] = elm.attrib.get("name", "<unnamed>")
    return pages

def main():
    pages = get_pages(sys.argv[1])
    if len(sys.argv) <= 2:
        for page, name in pages.items():
            print(f"{page}: {name}")
    else:
        drawio_exe = get_drawio_executable()
        for page in sys.argv[2:]:
            page = int(page)
            if page not in pages:
                print('Invalid page number:', page)
                continue
            page_name = pages[page]
            output = f"{page_name}.{FIGURE_FMT}"
            cmd = f"{drawio_exe} --export --format {FIGURE_FMT} --page-index {page} --output \"{output}\" \"{sys.argv[1]}\""
            os.system(cmd)

if __name__ == "__main__":
    if len(sys.argv) < 2:
        print("Usage: drawio.py <file.drawio> [page_numbers...]")
        print("The page numbers are 1-based.")
        sys.exit(1)
    main()