#!/usr/bin/env python3

import birchscript
import os
import os.path
import subprocess
import sys

# For systems on which there is no PostScript viewer (an increasing
# number of systems), this script runs ps2pdf and then opens the
# PDF viewer to view the PDF file. After viewing, the
# temporary file is deleted.
# $ACE_Viewer is the name of the program.
# $1 is the file for the program to use.

#Choose a PDF viewer

""" ensure that there are enough command line arguments to parse """
if len(sys.argv) < 2:
    print("Missing FILE parameter");
    print("");
    print("Usage: PStoPDFviewer.py  FILE");
    exit();


ACE_PDF_COMMAND = 'gv'

if os.environ.has_key("ACE_PDF_COMMAND"):
    ACE_PDF_COMMAND = os.environ.get("ACE_PDF_COMMAND")
else:
    os.putenv('ACE_PDF_COMMAND', 'gv')

INFILE = str(sys.argv[1])

print('Converting ' + INFILE + ' to PDF...')

TEMPF = 'PStoPDFviewer_' + str(os.getpid()) + '.pdf'

subprocess.call(['ps2pdf', INFILE, TEMPF])

#ls -l ./$tempfile

if os.path.exists(TEMPF):
    birchscript.Cleanrun([[ACE_PDF_COMMAND, TEMPF]], [TEMPF], True)