exiftool_updater.py

import io
import os
import requests
import subprocess
import zipfile


EXIFTOOLDIR = "C:\\tools\\exiftool"
EXIFTOOLURL = "https://www.sno.phy.queensu.ca/~phil/exiftool/"
EXIFTOOLVER = "http://owl.phy.queensu.ca/~phil/exiftool/ver.txt"


def get_local_version():
    exepath = os.path.join(EXIFTOOLDIR, "exiftool.exe")
    try:
        rawver = subprocess.run([exepath, "-ver"], capture_output=True).stdout
    except Exception:
        purever = "00.00"
    else:
        purever = str(rawver.strip(), "utf-8")
    return purever


def get_remote_version():
    req = requests.get(EXIFTOOLVER)
    if req.status_code == 200:
        remver = req.text
    else:
        remver = "00.00"
    return remver


def download_exiftool(remver):
    remurl = "{}exiftool-{}.zip".format(EXIFTOOLURL, remver)
    req = requests.get(remurl)
    bio = io.BytesIO(req.content)
    zipf = zipfile.ZipFile(bio)
    exiftoolexe = zipf.read("exiftool(-k).exe")
    with open(os.path.join(EXIFTOOLDIR, "exiftool.exe"), "wb") as afile:
        afile.write(exiftoolexe)


def is_it_newer(curver, remver):
    curint = int(curver.replace(".", ""))
    remint = int(remver.replace(".", ""))
    sentinel = True if remint > curint else False
    return sentinel


def main():
    curver = get_local_version()
    remver = get_remote_version()
    is_newer = is_it_newer(curver, remver)
    if is_newer:
        download_exiftool(remver)


if __name__ == "__main__":
    main()