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{ stdenv, fetchFromGitHub, autoreconfHook, pkgconfig
, leptonica, libpng, libtiff, icu, pango, opencl-headers
# Supported list of languages or `null' for all available languages
, enableLanguages ? null
# if you want just a specific list of languages, optionally specify a hash
# to make tessdata a fixed output derivation.
, enableLanguagesHash ? (if enableLanguages == null # all languages
then "1h48xfzabhn0ldbx5ib67cp9607pr0zpblsy8z6fs4knn0zznfnw"
else null)
}:
let tessdata = stdenv.mkDerivation ({
name = "tessdata";
src = fetchFromGitHub {
owner = "tesseract-ocr";
repo = "tessdata";
rev = "3cf1e2df1fe1d1da29295c9ef0983796c7958b7d";
# when updating don't forget to update the default value fo enableLanguagesHash
sha256 = "1v4b63v5nzcxr2y3635r19l7lj5smjmc9vfk0wmxlryxncb4vpg7";
};
buildCommand = ''
cd $src;
for lang in ${if enableLanguages==null then "*.traineddata" else stdenv.lib.concatMapStringsSep " " (x: x+".traineddata") enableLanguages} ; do
install -Dt $out/share/tessdata $src/$lang ;
done;
'';
preferLocalBuild = true;
} // (stdenv.lib.optionalAttrs (enableLanguagesHash != null) {
# when a hash is given, we make this a fixed output derivation.
outputHashMode = "recursive";
outputHashAlgo = "sha256";
outputHash = enableLanguagesHash;
}));
in
stdenv.mkDerivation rec {
name = "tesseract-${version}";
version = "3.05.00";
src = fetchFromGitHub {
owner = "tesseract-ocr";
repo = "tesseract";
rev = version;
sha256 = "11wrpcfl118wxsv2c3w2scznwb48c4547qml42s2bpdz079g8y30";
};
enableParallelBuilding = true;
nativeBuildInputs = [ pkgconfig autoreconfHook ];
buildInputs = [ leptonica libpng libtiff icu pango opencl-headers ];
LIBLEPT_HEADERSDIR = "${leptonica}/include";
postInstall = ''
for i in ${tessdata}/share/tessdata/*; do
ln -s $i $out/share/tessdata;
done
'';
meta = {
description = "OCR engine";
homepage = https://github.com/tesseract-ocr/tesseract;
license = stdenv.lib.licenses.asl20;
maintainers = with stdenv.lib.maintainers; [viric];
platforms = with stdenv.lib.platforms; linux ++ darwin;
};
}
|