def check_options(options):
gs_version = ghostscript.version()
check_external_program(
program='gs',
package='ghostscript',
version_checker=gs_version,
need_version='9.15', # limited by Travis CI / Ubuntu 14.04 backports
)
if gs_version in ('9.24', '9.51'):
raise MissingDependencyError(
f"Ghostscript {gs_version} contains serious regressions and is not "
"supported. Please upgrade to a newer version, or downgrade to the "
"previous version.")
# We have these constraints to check for.
# 1. Ghostscript < 9.20 mangles multibyte Unicode
# 2. hocr doesn't work on non-Latin languages (so don't select it)
is_latin = options.languages.issubset(HOCR_OK_LANGS)
if gs_version < '9.20' and options.output_type != 'pdf' and not is_latin:
# https://bugs.ghostscript.com/show_bug.cgi?id=696874
# Ghostscript < 9.20 fails to encode multibyte characters properly
log.warning(
f"The installed version of Ghostscript ({gs_version}) does not work "
"correctly with the OCR languages you specified. Use --output-type pdf or "
"upgrade to Ghostscript 9.20 or later to avoid this issue.")
if options.output_type == 'pdfa':
options.output_type = 'pdfa-2'
if options.output_type == 'pdfa-3' and ghostscript.version() < '9.19':
raise MissingDependencyError(
"--output-type pdfa-3 requires Ghostscript 9.19 or later")
def test_pdfa_n(pdfa_level, resources, outpdf):
if pdfa_level == '3' and ghostscript.version() < '9.19':
pytest.xfail(reason='Ghostscript >= 9.19 required')
check_ocrmypdf(
resources / 'ccitt.pdf',
outpdf,
'--output-type',
'pdfa-' + pdfa_level,
'--plugin',
'tests/plugins/tesseract_cache.py',
)
pdfa_info = file_claims_pdfa(outpdf)
assert pdfa_info['conformance'] == f'PDF/A-{pdfa_level}B'
