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https://github.com/kmein/niveum
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30 lines
541 B
Nix
30 lines
541 B
Nix
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# OCR a PDF file to text using tesseract
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{
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writers,
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poppler_utils,
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tesseract,
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coreutils,
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}:
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writers.writeDashBin "pdf-ocr" ''
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set -efu
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pdf_path="$(${coreutils}/bin/realpath "$1")"
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[ -f "$pdf_path" ] || {
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echo "Usage: pdf-ocr FILE.pdf" >&2
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exit 1
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}
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tmpdir="$(${coreutils}/bin/mktemp -d)"
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trap 'rm -rf $tmpdir' EXIT
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cd "$tmpdir"
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${poppler_utils}/bin/pdftoppm -png "$pdf_path" pdf-ocr
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for png in pdf-ocr*.png; do
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${tesseract}/bin/tesseract "$png" "$png.txt" 2>/dev/null
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done
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cat pdf-ocr-*.txt
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''
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