Commandline tool to convert ISO(19119 and 19139) metadata to DCAT-AP

iso-2-dcatap.py

#!/usr/bin/env python3
"""
Commandline tool to convert ISO(19119 and 19139) metadata to DCAT-AP based on https://github.com/SEMICeu/iso-19139-to-dcat-ap.
Requires: lxml 
Usage: `./iso2dcat.py --help`
"""
from lxml.etree import XML, XSLT, tostring
from urllib.request import urlopen
import argparse

XSL_URL = "https://raw.githubusercontent.com/SEMICeu/iso-19139-to-dcat-ap/master/iso-19139-to-dcat-ap.xsl"


def main(xml, xsl):
    if xml.startswith("http://") or xml.startswith("https://"):
        with urlopen(xml) as response:
            xml_string = response.read()
    else:
        with open(xml, mode="rb") as xml_file:
            xml_string = xml_file.read()

    if xsl.startswith("http://") or xsl.startswith("https://"):
        with urlopen(xsl) as response:
            xsl_string = response.read()
    else:
        with open(xsl, mode="rb") as xsl_file:
            xsl_string = xsl_file.read()

    xml = XML(xml_string)
    xsl = XML(xsl_string)
    transform = XSLT(xsl)
    print(tostring(transform(xml), pretty_print=True).decode("utf-8"))


if __name__ == "__main__":
    parser = argparse.ArgumentParser(description="Convert ISO19139 to DCAT-AP")
    parser.add_argument("xml", metavar="XML", type=str, help="XML file or URL")
    parser.add_argument("--xsl", metavar="XSL", type=str, help="XSLT file or URL")
    args = parser.parse_args()
    xsl = args.xsl
    if xsl is None:
        xsl = XSL_URL
    main(args.xml, xsl)
    exit(0)