54 lines
2.3 KiB
Python
54 lines
2.3 KiB
Python
# pdf-segmented: Generate PDFs using separate compression for foreground and background
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# Copyright (C) 2025 Lee Yingtong Li
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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import shutil
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import sys
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def assert_has_c44(error_message: str = 'DjvuLibre is required') -> None:
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if shutil.which('c44') is None:
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print('Error: {} (c44 not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_cjb2(error_message: str = 'DjvuLibre is required') -> None:
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if shutil.which('cjb2') is None:
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print('Error: {} (cjb2 not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_djvm(error_message: str = 'DjvuLibre is required') -> None:
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if shutil.which('djvm') is None:
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print('Error: {} (djvm not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_djvuextract(error_message: str = 'DjvuLibre is required') -> None:
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if shutil.which('djvuextract') is None:
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print('Error: {} (djvuextract not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_djvumake(error_message: str = 'DjvuLibre is required') -> None:
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if shutil.which('djvumake') is None:
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print('Error: {} (djvumake not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_imagemagick(error_message: str = 'ImageMagick is required') -> None:
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if shutil.which('magick') is None:
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print('Error: {} (magick not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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def assert_has_jbig2(error_message: str = 'jbig2enc is required') -> None:
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if shutil.which('jbig2') is None:
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print('Error: {} (jbig2 not found on PATH)'.format(error_message), file=sys.stderr)
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sys.exit(1)
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