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{
buildPythonPackage,
fetchPypi,
fetchpatch,
lib,
# build-system
cython,
pkg-config,
setuptools,
# native dependencies
leptonica,
tesseract4,
# dependencies
pillow,
# tests
unittestCheckHook,
}:
buildPythonPackage rec {
pname = "tesserocr";
version = "2.8.0";
format = "setuptools";
src = fetchPypi {
inherit pname version;
hash = "sha256-vlGNGxtf9UwRqtoeD9EpQlCepwWB4KizmipHOgstvTY=";
};
patches = [
# Fix a broken test. The issue has been reported upstream at
# https://github.com/sirfz/tesserocr/issues/363
# Check the status of the issue before removing this patch at the next
# update.
(fetchpatch {
url = "https://github.com/sirfz/tesserocr/commit/78d9e8187bd4d282d572bd5221db2c69e560e017.patch";
hash = "sha256-s51s9EIV9AZT6UoqwTuQ8lOjToqwIIUkDLjsvCsyYFU=";
})
];
# https://github.com/sirfz/tesserocr/issues/314
postPatch = ''
sed -i '/allheaders.h/a\ pass\n\ncdef extern from "leptonica/pix_internal.h" nogil:' tesserocr/tesseract.pxd
substituteInPlace setup.py \
--replace-fail "Cython>=0.23,<3.1.0" Cython
'';
build-system = [
cython
pkg-config
setuptools
];
buildInputs = [
leptonica
tesseract4
];
dependencies = [ pillow ];
pythonImportsCheck = [ "tesserocr" ];
nativeCheckInputs = [ unittestCheckHook ];
preCheck = ''
rm -rf tesserocr
'';
meta = {
changelog = "https://github.com/sirfz/tesserocr/releases/tag/v${version}";
description = "Simple, Pillow-friendly, wrapper around the tesseract-ocr API for Optical Character Recognition (OCR)";
homepage = "https://github.com/sirfz/tesserocr";
license = lib.licenses.mit;
maintainers = with lib.maintainers; [ mtrsk ];
platforms = lib.platforms.unix;
};
}
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