LazyLibrarian/gsconvert.py

#!/usr/bin/python

import os
import sys
import platform
import subprocess

if len(sys.argv) != 3:
    print("Usage: gsconvert input.pdf output.jpg")
else:
    GS = ""
    if platform.system() == "Windows":
        print("This version of gsconvert does not run under Windows")
    else:
        GS = os.path.join(os.getcwd(), "gs")
        if not os.path.isfile(GS):
            params = ["which", "gs"]
            try:
                GS = subprocess.check_output(params, stderr=subprocess.STDOUT).strip()
            except Exception as e:
                sys.exit("which gs failed: %s" % str(e))
            if not os.path.isfile(GS):
                sys.exit("Cannot find gs")

    try:
        params = [GS, "--version"]
        res = subprocess.check_output(params, stderr=subprocess.STDOUT)
        print("Using gs [%s] version %s" % (GS, res))
        jpeg = sys.argv[2]
        pdf = sys.argv[1]
        if '[' in pdf:
            pdf = pdf.split('[')[0]
        params = [GS, "-sDEVICE=jpeg", "-dNOPAUSE", "-dBATCH", "-dSAFER", "-dFirstPage=1", "-dLastPage=1",
                  "-sOutputFile=%s" % jpeg, pdf]
        res = subprocess.check_output(params, stderr=subprocess.STDOUT)
        if not os.path.isfile(jpeg):
            print("Failed to create jpg: %s" % res)
    except subprocess.CalledProcessError as e:
        sys.exit("call to subprocess failed: %s" % str(e))