OCRmyPDF/tests/spoof/gs_feature_elision.py

#!/usr/bin/env python3
# © 2016 James R. Barlow: github.com/jbarlow83
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.


import os
import sys
from subprocess import check_call

from gs import real_ghostscript

"""Replicate one type of Ghostscript feature elision warning during
PDF/A creation."""


elision_warning = """GPL Ghostscript 9.20: Setting Overprint Mode to 1
not permitted in PDF/A-2, overprint mode not set"""


def main():
    if '--version' in sys.argv:
        print('9.20')
        print('SPOOFED: ' + os.path.basename(__file__))
        sys.exit(0)
    gs_args = ['gs'] + sys.argv[1:]
    check_call(gs_args)

    if '-sDEVICE=pdfwrite' in sys.argv[1:]:
        print(elision_warning)

    sys.exit(0)


if __name__ == '__main__':
    main()