mirror of
https://github.com/ocrmypdf/OCRmyPDF.git
synced 2026-02-15 08:42:25 -05:00
8d848284df
Modified pipeline to fix regression and return the proper error code if we did not produce a PDF/A as expected. The wrapper forces the output to be PDF 1.3 which is not PDF/A compliant. The funny thing is that in some cases JHOVE incorrectly states that a file is PDF/A-1b compliant, well formed and valid, even when it is not according to Acrobat XI and is missing the PDF/A metadata marker, as far as I can tell. JHOVE may not be as beneficial as hoped.
73 lines
2.2 KiB
Python
Executable File
73 lines
2.2 KiB
Python
Executable File
#!/usr/bin/env python3
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import sys
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import os
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'''
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For testing PDF/A generation failures, this wrapper calls ghostscript
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but filters out all PDF/A information so that a regular PDF will be
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created instead.
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It assumes that it is called from a staged system PATH where the first
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item on the PATH contains a file named 'gs' which is a symlink to this
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file. It will strip out the first item on path to invoke the real
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'gs'. That is, it expects this when called
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1. tests/output/[...test name...]/bin/gs is a symlink to this file
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2. tests/output/bin is the first item on PATH
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3. The real executable is on the path
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OCRmyPDF also calls "gs --version" and "gs --help". gs answers both
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on stdout so, this wrapper prints to stderr.
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'''
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def pdfa_param(arg):
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if arg.startswith('-sPDFA'):
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return True
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if arg.startswith('-dPDFA'):
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return True
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if arg.endswith('.ps'):
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return True
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if 'ColorConversionStrategy' in arg:
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return True
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if 'ProcessColorModel' in arg:
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return True
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if 'OutputICCProfile' in arg:
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return True
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return False
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if __name__ == '__main__':
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sys_args = sys.argv[1:]
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print("Fake Ghostscript wrapper", file=sys.stderr)
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if any(pdfa_param(arg) for arg in sys_args):
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# We were asked to produce a PDF/A
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# Filter out PDF/A arguments
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args = [arg for arg in sys.argv[1:]
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if not pdfa_param(arg)]
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# Tell Ghostscript to create a PDF 1.3 instead so JHOVE won't
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# think it's a PDF/A
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indexof_pdfwrite = next(n for n, item in enumerate(args)
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if 'pdfwrite' in item)
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args.insert(indexof_pdfwrite + 1, '-dCompatibilityLevel=1.3')
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print("Rewrote arguments", file=sys.stderr)
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else:
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args = sys_args
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print("Keeping arguments", file=sys.stderr)
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exec_path = os.environ['PATH'].split(os.pathsep)
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env = os.environ.copy()
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env['PATH'] = os.pathsep.join(exec_path[1:])
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print("Calling real Ghostscript with modified args and env",
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file=sys.stderr)
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print(args, file=sys.stderr)
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print(env['PATH'], file=sys.stderr)
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sys.stderr.flush()
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os.execvpe('gs', ['gs'] + args, env)
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